WO2021212794A1 - 电池包及电动车 - Google Patents

电池包及电动车 Download PDF

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Publication number
WO2021212794A1
WO2021212794A1 PCT/CN2020/124746 CN2020124746W WO2021212794A1 WO 2021212794 A1 WO2021212794 A1 WO 2021212794A1 CN 2020124746 W CN2020124746 W CN 2020124746W WO 2021212794 A1 WO2021212794 A1 WO 2021212794A1
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WIPO (PCT)
Prior art keywords
pole core
battery pack
electrode lead
adjacent
box body
Prior art date
Application number
PCT/CN2020/124746
Other languages
English (en)
French (fr)
Inventor
孙华军
鲁志佩
彭青波
万龙
朱燕
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to KR1020227040738A priority Critical patent/KR20230005895A/ko
Priority to EP20932601.6A priority patent/EP4142024A4/en
Priority to EP23214629.0A priority patent/EP4318781A3/en
Priority to JP2022564522A priority patent/JP2023522472A/ja
Priority to EP23214631.6A priority patent/EP4311008A3/en
Priority to EP23214628.2A priority patent/EP4329081A3/en
Publication of WO2021212794A1 publication Critical patent/WO2021212794A1/zh

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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
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/358—External gas exhaust passages located on the battery cover or case
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
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    • 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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    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
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    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
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    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
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    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
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    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/276—Inorganic material
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
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    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
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    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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    • H01M50/572—Means for preventing undesired use or discharge
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    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
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    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/591—Covers
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    • H01M50/593—Spacers; Insulating plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/12—Emission reduction of exhaust
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    • 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
    • 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

Definitions

  • the present disclosure relates to the field of batteries, in particular to a battery pack and an electric vehicle.
  • the traditional battery pack uses the battery module to be installed in the battery pack box to form a battery pack structure.
  • the battery module includes a battery pack composed of a plurality of single cells arranged in sequence, side plates arranged on both sides of the battery pack, and end plates arranged on both ends of the battery pack.
  • the side plate and the end plate are connected by bolts or tie rods or welding to realize the fixation of the battery pack.
  • This assembly method of first assembling the battery into a battery module and then installing the battery module in the battery pack box has the problems of cumbersome assembly process and complicated assembly process, which leads to an increase in costs such as manpower and material resources.
  • the structural components of the battery module itself will also cause the weight of the battery pack to be heavy, which reduces the utilization of the internal space of the battery pack.
  • the water vapor and other substances in the battery pack will also affect the service life of the parts in the battery pack.
  • a battery pack in a first aspect of the embodiments of the present disclosure, includes a sealed box, at least one structural beam located in the box, and a plurality of pole core strings electrically connected to each other;
  • the box body includes a box body, the box body includes a top plate and a bottom plate oppositely arranged along a first direction, the first direction is the height direction of the box body, and the structural beam is located between the top plate and the bottom plate.
  • at least one of the structural beams divides the inside of the box into a plurality of accommodating cavities, at least one of the structural beams is connected to the top plate and the bottom plate, and at least one of the accommodating chambers is provided with at least one accommodating cavity.
  • the pole core string; the air pressure of the accommodating cavity is lower than the air pressure outside the box;
  • a mounting part is provided on the box body, and the mounting part is used for connecting and fixing with an external load;
  • the pole core string includes a plurality of pole core groups arranged in sequence along a second direction and connected in series; the pole core set is encapsulated in a packaging film; the length direction of the pole core string extends in the second direction; the first The two directions are the width direction of the box body or the second direction is the length direction of the box body.
  • the beneficial effects of the first aspect of the embodiments of the present disclosure omits the fixing structure of the battery casing and the battery module in the prior art, thereby improving the space utilization rate of the battery pack and reducing the battery pack
  • the weight of the battery pack increases the energy density of the battery pack, and the battery pack of the present disclosure has a simple structure and high assembly efficiency, which is conducive to reducing production costs.
  • the structural beam is located between the top plate and the bottom plate.
  • the structural beam is connected to the top plate and the bottom plate. This design makes the structural beam, the top plate and the bottom plate constitute an I-shaped structure. This structure has high strength and rigidity, which can meet the requirements of the battery pack box.
  • the structure of the box body of the battery pack of the embodiment of the present disclosure is relatively simple, the manufacturing cost is low, and the space utilization rate is high.
  • the structural beam divides the box into multiple accommodating cavities. When the cell assembly or single battery in one of the accommodating cavities is thermally out of control, other accommodating cavities will not be affected, which can improve the safety of the battery pack.
  • the structural strength of the battery pack can be used as a part of the structural strength of the entire vehicle, thereby improving the structural strength of the entire vehicle, which is conducive to the realization of the lightweight design of the entire electric vehicle At the same time, it also reduces the design and manufacturing cost of the whole vehicle; in addition, vacuum treatment is carried out inside the accommodating cavity in the battery pack box to avoid the long-term aging effect of water vapor and oxygen on the pole core group and various parts in the box. Improve the service life of the pole core group or each component inside the box.
  • an electric vehicle including a vehicle body and the battery pack described above, the battery pack being fixed to the vehicle body.
  • FIG. 1 is a schematic structural diagram of a battery pack provided by an embodiment of the disclosure.
  • FIG. 2 is a schematic diagram of a structure of assembling a pole core into a box provided by an embodiment of the present disclosure.
  • FIG. 3 is a schematic structural diagram of a pole core string provided by an embodiment of the present disclosure.
  • Fig. 4a is a schematic structural diagram of a pole core set and a fixed spacer connection provided by an embodiment of the present disclosure.
  • Fig. 4b is an exploded perspective view of a pole core set and a fixed spacer connection provided by an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of two pole core strings connected in series in the same accommodating cavity according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of another structure in which two pole core strings are connected in series in the same accommodating cavity according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a series-parallel connection of two pole cores in the same accommodating cavity provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a series connection of two pole core strings in two accommodating cavities provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a series-parallel connection of two pole cores in two accommodating cavities according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of another structure in which two pole core strings in two accommodating cavities are connected in series according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of another structure in which two pole cores in two accommodating cavities are connected in series and connected in parallel according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a pole core assembly encapsulated by a packaging film provided by an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a pole core assembly encapsulated by a encapsulation film provided by another embodiment of the present disclosure.
  • Fig. 14 is an enlarged view of part M in Fig. 2.
  • FIG. 15 is a three-dimensional exploded view of a battery pack provided by an embodiment of the disclosure.
  • Fig. 16 is an enlarged view of part N in Fig. 15.
  • FIG. 17 is a partial perspective exploded view of an insulating fixing member and a protective cover provided by an embodiment of the present disclosure.
  • FIG. 18 is a schematic diagram of a structure in which an insulating and heat insulating member is installed in a box provided by an embodiment of the present disclosure.
  • FIG. 19 is a schematic structural diagram of another battery pack omitting the third frame and the fourth frame provided by an embodiment of the present disclosure.
  • FIG. 20 is a schematic structural diagram of the distribution of air suction holes in a battery pack provided by an embodiment of the present disclosure.
  • FIG. 21 is a schematic structural diagram of the distribution of air suction holes in a battery pack provided by another embodiment of the present disclosure.
  • FIG. 22 is a schematic diagram of the structure of the air extraction hole distribution in the battery pack provided by another embodiment of the present disclosure.
  • FIG. 23 is a schematic structural diagram of an electric vehicle provided by another embodiment of the present disclosure.
  • Pole core set 401. Pole core string; 410, the first electrode lead-out part; 420, the second electrode lead-out part; 430, the main body of the pole core set; 440, the first conductive member; 450, the fixed spacer; 451, Plug; 452, jack; 453, first spacer; 454, second spacer; 460, second conductive member;
  • Packaging film 510. Packaging department;
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present disclosure, “plurality” means two or more than two, unless otherwise specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection. , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components.
  • installed may be a fixed connection or a detachable connection. , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components.
  • the first embodiment of the present disclosure provides a battery pack 10, the battery pack 10 includes a sealed box and at least one structural beam 200 (shown in FIG. 2) located in the box , A plurality of pole core strings 401 electrically connected to each other.
  • the box body includes a box body 100.
  • the box body 100 includes a top plate 120 and a bottom plate 130 oppositely arranged along a first direction.
  • the first direction is the height direction of the box body 100.
  • the structural beam 200 is located at Between the top plate 120 and the bottom plate 130, at least one structural beam 200 divides the inside of the box into a plurality of accommodating cavities 300, and at least one structural beam 200 is connected to the top plate 120 and the bottom plate 130.
  • At least one pole core string 401 is provided in at least one accommodating cavity 300; the air pressure of the accommodating cavity 300 is lower than the air pressure outside the box body; the box body is provided with a mounting portion 110, so The mounting portion 110 is used for connecting and fixing with an external load.
  • the pole core string 401 includes a plurality of pole core groups 400 arranged in sequence along the second direction and connected in series; the pole core groups 400 are encapsulated in a packaging film 500 (as shown in FIG. 12 or FIG. 13);
  • the length direction of the core string 401 extends along the second direction; the second direction is the width direction of the box body or the second direction is the length direction of the box body.
  • the first direction is the X direction in the figure
  • the second direction is the Z direction in the figure.
  • the embodiment of the present disclosure omits the fixing structure of the battery case and the battery module, thereby improving the space utilization rate of the battery pack 10, reducing the weight of the battery pack 10, and increasing the energy density of the battery pack 10, and the battery pack 10 of the present disclosure
  • the structure is simple and the assembly efficiency is high, which is beneficial to reduce production costs.
  • the structural beam 200 is located between the top plate 120 and the bottom plate 130, and the structural beam 200 is connected to the top plate 120 and the bottom plate 130.
  • the structural beam 200, the top plate 120 and the bottom plate 130 constitute an "I"-shaped structure.
  • This structure has high strength and rigidity, so as to meet the load-bearing, impact-resistant and anti-extrusion of the box of the battery pack 10
  • the requirements of compression performance are relatively simple, the manufacturing cost is low, and the space utilization rate is high.
  • the structural beam 200 divides the box into a plurality of accommodating cavities 300. When the cell assembly or single battery in one of the accommodating cavities 300 is thermally out of control, it will not affect the other accommodating cavities 300, which can improve the battery pack 10 Safety at work.
  • the structural strength of the battery pack 10 can be used as a part of the structural strength of the entire vehicle, thereby improving the structural strength of the entire vehicle, which is conducive to the realization of lightweight electric vehicles. It also reduces the design and manufacturing costs of the entire vehicle.
  • the air pressure of the accommodating cavity 300 is lower than the air pressure outside the box.
  • the inside of the accommodating chamber 300 can be evacuated so that the air pressure of the accommodating chamber 300 is lower than the air pressure outside the box.
  • the stock of water vapor, oxygen and other substances in the box can be reduced to avoid water vapor,
  • the long-term aging effect of oxygen on the pole core group and various parts in the box body is beneficial to improve the service life of the pole core group or each part in the box body.
  • the pole core group 400 includes at least one pole core.
  • the pole core group 400 includes two or more pole cores, the pole cores are connected in parallel.
  • the pole core mentioned in the embodiments of the present disclosure is a pole core commonly used in the field of power batteries.
  • the pole core and the pole core group 400 are part of the battery and cannot be understood as the battery itself; in addition, the pole core may be a coil.
  • the pole core formed by winding can also be a pole core made by lamination; in general, the pole core includes at least a positive electrode sheet, a separator and a negative electrode sheet.
  • the structural beam 200 is connected to the top plate 120 and the bottom plate 130. It can be understood that the structural beam 200 is integrally formed with the top plate 120 and the bottom plate 130; or, the structural beam 200, the top plate 120 and the bottom plate 130 are made separately and then directly or The connection is made in an indirect connection mode, which is not specifically limited in the embodiment of the present disclosure.
  • the direct connection can be that one end of the structural beam 200 is connected to the bottom plate 130, and the opposite end of the structural beam 200 is connected to the top plate 120.
  • one end of the structural beam 200 can be welded to the bottom plate 130 first, and then the other end of the structural beam 200 is opposite to the other.
  • One end is welded to the top plate 120.
  • the indirect connection may be that one end of the structural beam 200 is connected to the bottom plate 130 through an intermediate plate, and the opposite end of the structural beam 200 is connected to the top plate 120 through the intermediate plate.
  • At least one structural beam 200 is joined to the top plate 120 and the bottom plate 130. It can be understood that the top plate 120, the bottom plate 130, and the structural beam 200 are integrally formed; or, one of the top plate 120 and the bottom plate 130 is integrally formed with the structural beam 200, and the other is welded to the structural beam 200; or, the structural beam 200 One end is welded to the bottom plate 130, and the opposite end of the structural beam 200 is welded to the top plate 120.
  • the plurality of pole core strings 401 are electrically connected to each other, and the pole core strings 401 in two adjacent accommodating cavities 300 may be connected in series or in parallel; or, the pole cores in two spaced accommodating cavities 300 may be connected in series or in parallel.
  • the strings 401 are connected in series or in parallel; it can also be connected in series or in parallel with three or more pole core strings 401 in the accommodating cavity 300.
  • the number of pole core strings 401 in each accommodating cavity 300 and the number of pole core groups 400 contained in each pole core string 401 can be designed according to different power requirements.
  • the number of pole core strings 401 in each accommodating cavity 300 may be the same or different.
  • the pole core strings 401 can be connected in series, in parallel or in series.
  • the box body of the battery pack 10 of the embodiment of the present disclosure is provided with a mounting portion 110, and the box body of the battery pack 10 is detachably or non-detachably connected and fixed with an external load through the mounting portion provided thereon.
  • the box body of the battery pack 10 needs to be connected and fixed with an external load, so it has special requirements for its anti-impact and anti-extrusion properties, so it cannot be simply equated with the outer casing of a battery module or a single battery.
  • the battery pack 10 also includes at least one of a battery management system (BMS), a battery connector, a battery sampler, and a battery thermal management system.
  • BMS battery management system
  • the pressure in the accommodating cavity is -40KPa to -70KPa.
  • This setting can ensure to reduce the inventory of water vapor, oxygen and other substances in the box, avoid the long-term aging effect of water vapor and oxygen on the pole core set and various parts in the box, and is beneficial to improve the pole core set or each zero in the box.
  • the service life of the component can also ensure good ion conduction of the pole core group, so as to help improve the cycle life.
  • each of the structural beams 200 there are multiple structural beams 200, and the multiple structural beams 200 are spaced apart along the third direction, and the length of the structural beam 200 extends in the second direction, so The third direction is different from the first direction and the second direction, and each of the structural beams 200 is connected to the top plate 120 and the bottom plate 130.
  • each structural beam 200 when each structural beam 200 is connected to the top plate 120 and the bottom plate 130, each of the structural beams 200, top plate 120 and bottom plate 130 form an "I"-shaped structure.
  • This structure has high strength and rigidity, which can satisfy The load-bearing, anti-impact and anti-extrusion performance requirements of the box.
  • the structural strength of the battery pack 10 can be used as a part of the structural strength of the entire vehicle, thereby improving the structural strength of the entire vehicle, which is conducive to the realization of the lightweight design of the entire electric vehicle Requirements, while also reducing the design and manufacturing costs of the entire vehicle.
  • the first direction is the height of the box 100
  • the second direction is the width direction of the box 100
  • the third direction is the length direction of the box 100; alternatively, the second direction is the length of the box 100
  • the third direction is the width direction of the box 100.
  • the first direction is the X direction in the figure
  • the second direction is the Z direction in the figure
  • the third direction is the Y direction in the figure.
  • any two of the first direction, the second direction, and the third direction may also be set at other angles, such as 80° or 85°, which is not specifically limited in the embodiment of the present disclosure.
  • the structural beam 200 is connected to the top plate 120 and the bottom plate 130. It can be understood that the structural beam 200 is integrally formed with the top plate 120 and the bottom plate 130; or, the structural beam 200, the top plate 120 and the bottom plate 130 are made separately and then The connection is made through a direct or indirect connection, which is not specifically limited in the embodiment of the present disclosure.
  • the box body and the structural beam are integrally formed.
  • Such a setting not only has simple processing technology, but also helps reduce production costs, but also ensures that the box body has sufficient structural strength and rigidity to meet the requirements of the box body's load-bearing, impact resistance, and anti-extrusion properties.
  • the top plate, the bottom plate and the structural beam are integrally formed.
  • the bottom plate and the structural beam are integrally formed, and then the top plate is welded to the structural beam.
  • the top plate and the structural beam are integrally formed, and then the bottom plate is welded to the structural beam.
  • the length of the accommodating cavity 300 along the second direction is greater than 500 mm, and further, the length of the accommodating cavity 300 along the second direction is 500 mm-2500 mm.
  • Such a design can make the length of the pole core string 401 arranged in the accommodating cavity 300 longer, and can also accommodate more pole core groups 400, so that the battery pack 10 can meet a larger capacity and a higher space utilization rate. Requirements.
  • the length of the accommodating cavity 300 along the second direction is 1000 mm-2000 mm.
  • the length of the accommodating cavity 300 along the second direction is 1300 mm-2200 mm.
  • the box body 100 further includes a first frame 140 and a second frame 150 distributed on both sides of the box body 100 along a third direction, and the second direction is
  • the third direction is the width direction of the box body 100; or, the second direction is the width direction of the box body 100, and the third direction is the width direction of the box body 100.
  • the length direction of the body 100 is For the length direction of the box body 100.
  • the box body 100 includes a top plate 120 and a bottom plate 130 opposed to each other along a first direction, and a first frame 140 and a second frame 150 opposed to each other along a third direction.
  • the top plate 120, the first frame 140, the bottom plate 130, and the second frame The two frames 150 are connected.
  • the top plate 120, the first frame 140, the bottom plate 130, and the second frame 150 are connected, and may be connected by direct or indirect connection.
  • the direct connection can be understood as that the top plate 120, the first frame 140, the bottom plate 130, and the second frame 150 jointly enclose an accommodation space, and the structural beam 200 is located in the accommodation space.
  • the top plate 120, the first frame 140, the bottom plate 130, and the second frame 150 are integrally formed, and this arrangement can ensure that the box has a high structural strength, while the processing is relatively simple, which is beneficial to reduce production costs.
  • the top plate 120, the first frame 140, the bottom plate 130, and the second frame 150 can also be made separately and then connected.
  • the connection may be through a connecting plate, which is not specifically limited in the embodiment of the present disclosure.
  • the top plate 120, the first frame 140, the bottom plate 130, the second frame 150 and the structural beam 200 are integrally formed, for example, an integral aluminum profile is used for extrusion. This not only ensures that the box body of the battery pack 10 has a high structural strength, but also simplifies the manufacturing process and reduces the processing cost.
  • At least one of the first frame 140 and the second frame 150 has a cavity, and a reinforcing plate 141 is provided in the cavity, and the reinforcing plate 141 divides the cavity into a plurality of sub-cavities.
  • This arrangement can ensure that the first frame 140 and the second frame 150 have a certain strength, which is beneficial to improve the impact and compression resistance of the battery pack 10.
  • first frame 140 and the second frame 150 are provided with mounting portions 110, and the mounting portions 110 are used for connecting and fixing with an external load.
  • the mounting portion 110 may also be provided on the top plate 120 or the bottom plate 130.
  • the mounting portion 110 is a mounting hole 111 provided on the first frame 140 and the second frame 150.
  • the mounting hole 111 is used for passing fasteners (such as bolts or rivets) to connect and fix the battery pack 10 to an external load.
  • the mounting hole 111 provided on the first frame 140 penetrates the first frame 140 along the first direction
  • the mounting hole 111 provided on the second frame 150 penetrates the second frame 150 along the first direction.
  • the axial direction of the mounting hole 111 and the first direction may also be arranged at an included angle, for example, 5° or 10°.
  • the mounting holes 111 provided on the first frame 140 are sequentially arranged along the length direction of the first frame 140.
  • the length direction of the first frame 140 is parallel to the second direction.
  • the mounting holes 111 provided on the second frame 150 are sequentially arranged along the length direction of the second frame 150. Wherein, the length direction of the second frame 150 is parallel to the second direction.
  • the mounting portion 110 is a hanging ring provided on the first frame 140 and the second frame 150.
  • the lifting ring is fixedly connected with the vehicle body to connect and fix the battery pack 10 to an external load.
  • the mounting portion 110 is a mounting block provided on the first frame 140 and the second frame 150, and the mounting block can be fixed to the vehicle body by welding.
  • the mounting block can also be fixed to the external load by gluing or clamping.
  • the end of the box body 100 along the second direction is provided with a first opening 180; the box body further includes an end plate that closes the first opening 180 112. It can be understood that the pole core string 401 can be installed in the receiving cavity 300 through the first opening 180. This installation method is easier to operate and can ensure that the box body 100 has a higher structural strength.
  • both ends of the box body 100 along the second direction are provided with first openings 180;
  • the end plate 112 includes a third frame 160 and a fourth frame 170, the third frame 160 and the fourth frame
  • the frame 170 is hermetically connected with the box body 100 to close the corresponding first opening 180. That is, the third frame 160 and the fourth frame 170 are distributed at both ends of the box body 100 along the second direction, and the third frame 160 is hermetically connected to the box body 100 to close the first opening 180 provided adjacent to the third frame 160.
  • the four frame 170 is sealed to the box body 100 to close the first opening 180 provided adjacent to the fourth frame 170.
  • both ends of the box body 100 along the second direction are provided with the first openings 180, the first electrode and the second electrode (that is, the positive electrode and the negative electrode) of the electrode core string 401 located in the containing cavity 300 It can be led out from two first openings 180 respectively.
  • box body 100, the third frame 160, and the fourth frame 170 are made of metal parts and are hermetically connected by welding.
  • the box body 100, the third frame 160 and the fourth frame 170 can also be made of plastic.
  • both the third frame 160 and the fourth frame 170 and the box body 100 can also be hermetically connected by means of gluing or clamping.
  • the third frame 160 and the fourth frame 170 have a hollow structure inside, and the third frame 160 and the fourth frame 170 are provided with reinforcing plates, and the reinforcing plates divide the internal spaces of the third frame 160 and the fourth frame 170 into multiple A sub-cavity. This arrangement can ensure that the third frame 160 and the fourth frame 170 have a certain strength, which is beneficial to improve the impact and compression resistance of the box body 100 of the battery pack 10.
  • the battery pack 10 further includes a sealing plate, the end of the accommodating cavity 300 in the second direction is provided with a second opening, the sealing plate is located inside the end plate, and the sealing plate It is connected with the structural beam 200 and the box body 10 to block a part of the second opening adjacent to the bottom plate 130. That is, the second opening is half-blocked by the sealing plate, so that when the packaging film 500 is accidentally ruptured, the electrolyte flows from one accommodating cavity 300 to another accommodating cavity 300 and causing an internal short circuit, thereby improving the battery Pack 10 security for use.
  • the semi-blocking of the second openings of the accommodating cavities 300 at both ends of the plurality of accommodating cavities 300 may be that the sealing plate is connected to the first frame 140, the bottom plate 130 and the structural beam 200, or the sealing plate is connected to the second frame 150 , The bottom plate 130 and the structural beam 200 are connected to block a portion of the second opening of the receiving cavity 300 adjacent to the bottom plate 130.
  • the second opening of the remaining accommodating cavities 300 among the plurality of accommodating cavities 300 may be half-blocked by connecting a sealing plate with the bottom plate 130 and two adjacent structural beams 200 to block the second opening of the accommodating cavity 300 adjacent to the bottom plate 130. Part.
  • the battery pack 10 further includes a sealing plate, an end of the accommodating cavity in the second direction is provided with a second opening, and the sealing plate is located inside the end plate,
  • the sealing plate is connected with the structural beam 200 and the box body 100 to completely block the second opening of the accommodating cavity 300. That is, the second opening of the accommodating cavity 300 is completely blocked by the sealing plate, so as to further improve the safety of the battery pack 10 in use.
  • the second openings of the accommodating cavities 300 located at both ends of the plurality of accommodating cavities 300 are completely blocked by the sealing plate being connected to the first frame 140, the structural beam 200, the top plate 120 and the bottom plate 130, or the sealing plate and the first frame
  • the two frames 150, the structural beam 200, the top plate 120 and the bottom plate 130 are connected to completely block the second opening of the containing cavity 300.
  • the sealing plate may be connected with the bottom plate 130, the top plate 120 and two adjacent structural beams 200 to completely block the second openings of the accommodating cavity 300 .
  • the length of the pole core string 401 is greater than 400 mm, and further, the length of the pole core string 401 is 400 mm-2500 mm. Further, the length of the pole core string 401 is 1000 mm-2000 mm. Further, the length of the pole core string 401 is 1300 mm-2200 mm. It is understandable that a plurality of pole core groups 400 are arranged in series in the accommodating cavity 300 to form a pole core string 401. Compared with the existing pole core set 400 with the same length as the pole core string 401, the internal resistance can be reduced. .
  • the pole core set 400 includes a first electrode lead-out part 410 and a second electrode lead-out part 420 for drawing current, the first electrode lead-out part 410 and The second electrode lead-out parts 420 are distributed on opposite sides of the pole core set 400 along the second direction.
  • the second electrode lead-out component 420 is electrically connected to connect two adjacent pole core groups 400 in series. That is, the multiple pole core groups 400 are arranged in a "head to tail connection" arrangement, which can conveniently realize the pair of pole core sets 400 in series, and the connection structure is simple.
  • a plurality of pole core strings 401 are provided in the containing cavity 300, and the plurality of pole core strings 401 are sequentially arranged and electrically connected along the thickness direction of the pole core group 400.
  • the thickness direction of the pole core assembly 400 is parallel to the third direction. In this way, more pole core strings 401 can be arranged in the containing cavity 300 to meet actual requirements.
  • a plurality of the pole core strings 401 in the same containing cavity 300 are connected in series.
  • the first pole core set 400 of one pole core string 401 of the two adjacent pole core strings 401 is electrically connected to the first pole core set 400 of the other pole core string 401.
  • the last pole core group 400 of one pole core string 401 of the two adjacent pole core strings 401 is electrically connected to the last pole core set 400 of the other pole core string 401.
  • the leftmost one of the two pole core strings 401 is the first pole core group 400, and the rightmost one is the last pole core group 400.
  • first electrode lead-out part 410 of the first pole core group 400 of one pole core string 401 of the two adjacent pole core strings 401 and the first pole core set 400 of the other pole core string 401 The two electrode lead-out parts 420 are located on the same side (as shown in FIG. 5). Or, the second electrode leading part 420 of the last pole core group 400 of one pole core string 401 of the two adjacent pole core strings 401 and the first electrode of the last pole core set 400 of the other pole core string 401 are drawn The parts 410 are on the same side (as shown in Figure 6).
  • the series connection between the pole core strings 401 in the same accommodating cavity 300 can save the wiring space of the connecting wires.
  • other series connection methods can also be used.
  • a plurality of pole core strings 401 in the same containing cavity 300 are connected in parallel.
  • the first pole core set 400 of one pole core string 401 of the two adjacent pole core strings 401 is electrically connected to the first pole core set 400 of the other pole core string 401, and two adjacent pole core strings 401 are electrically connected.
  • the last pole core set 400 of one pole core string 401 is electrically connected to the last pole core set 400 of the other pole core string 401. As shown in FIG. 7, the leftmost one of the two pole core strings 401 is the first pole core group 400, and the rightmost one is the last pole core group 400.
  • the first electrode lead-out part 410 of the first pole core group 400 of one pole core string 401 of the two adjacent pole core strings 401 and the first electrode of the first pole core set 400 of the other pole core string 401 The lead-out part 410 is located on the same side, and the second electrode lead-out part 420 of the last electrode core group 400 of one of the two adjacent electrode core strings 401 and the last electrode core group of the other electrode core string 401
  • the second electrode lead-out part 420 of 400 is located on the same side.
  • the pole core strings 401 in the same accommodating cavity 300 are connected in parallel by the above-mentioned connection method, which can save the wiring space of the connecting wires.
  • other parallel connection methods can also be used.
  • pole core strings 401 in two adjacent accommodating cavities 300 are connected in series.
  • the first pole core group 400 of one of the pole core strings 401 in one of the two adjacent accommodating cavities 300 and the first pole core set of one of the pole core strings 401 in the other accommodating cavity 300 400 is electrically connected; or, the last pole core group 400 of one of the pole core strings 401 in one of the two adjacent accommodating cavities 300 and the last pole core string 401 of the other accommodating cavity 300
  • One pole core group 400 is electrically connected.
  • the first pole core group 400 of the pole core string 401 is the leftmost pole core group 400
  • the last pole core group 400 of the pole core string 401 is the rightmost pole core group 400.
  • the first pole core set 400 of the pole core string 401 is the rightmost pole core set 400
  • the last pole core set 400 of the pole core string 401 is the leftmost pole core set 400.
  • FIG. 8 shows a situation where each accommodating cavity 300 includes three pole core strings 401, and the two pole core strings 401 with the closest spacing positions in the two accommodating cavities 300 are electrically connected; in other embodiments
  • the accommodating cavity 300 may include one or different from three pole core strings 401
  • the accommodating cavity 300 when the accommodating cavity 300 includes a plurality of pole core strings 401, it may also include one of the accommodating cavities 300 in the third direction.
  • the first pole core string 401 is electrically connected to the second pole core string 401 of the other accommodating cavity 300 in the third direction, that is to say, it may not be the two pole core strings 401 with the closest spacing in the two accommodating cavities 300. Electric connection.
  • the first electrode lead-out part 410 of the first electrode core group 400 of one of the electrode core strings 401 in one of the accommodating cavities 300 of the two adjacent accommodating cavities 300 and the other accommodating cavity 300 The second electrode lead-out component 420 of the first pole core set 400 of one of the pole core strings 401 is located on the same side;
  • the first electrode lead-out part 410 of the last pole core set 400 of one of the pole core strings 401 in one of the two adjacent accommodating cavities 300 and one of the pole core strings in the other accommodating cavity 300 The second electrode lead-out part 420 of the last pole core group 400 of 401 is located on the same side.
  • the series connection between the pole core strings 401 in two adjacent accommodating cavities 300 can save the wiring space of the connecting wires by adopting the above-mentioned connection method. In other embodiments, other series connection methods can also be used.
  • two adjacent accommodating cavities 300 are respectively defined as a first accommodating cavity 300 and a second accommodating cavity 300, and a pole core string 401 is arranged in the first accommodating cavity 300 adjacent to the second accommodating cavity 300 It is connected in series with a pole core string 401 arranged in the second accommodating cavity 300 adjacent to the first accommodating cavity 300.
  • first pole core set 400 of a pole core string 401 in the first accommodating cavity 300 adjacent to the second accommodating cavity 300 and a pole core string 401 in the second accommodating cavity 300 adjacent to the first accommodating cavity 300 The first pole core set 400 is electrically connected.
  • One pole core group 400 is electrically connected.
  • connection mode can save the wiring space of the connection line.
  • pole core strings 401 in two adjacent accommodating cavities 300 are connected in parallel.
  • the first pole core set 400 of one of the pole core strings 401 in one of the two adjacent accommodating cavities 300 and the first pole core set of one of the pole core strings 401 in the other accommodating cavity 300 400 is electrically connected, and the last pole core group 400 of one of the pole core strings 401 in one of the two adjacent accommodating cavities 300 and the last pole core string 401 of the other accommodating cavity 300
  • the pole core assembly 400 is electrically connected.
  • the first pole core group 400 of the pole core string 401 is the leftmost pole core group 400
  • the last pole core group 400 of the pole core string 401 is the rightmost pole core group 400.
  • the first pole core set 400 of the pole core string 401 is the rightmost pole core set 400
  • the last pole core set 400 of the pole core string 401 is the leftmost pole core set 400.
  • the first electrode lead-out part 410 of the first pole core group 400 of one of the pole core strings 401 in one of the two adjacent accommodating cavities 300 and one of the pole cores in the other accommodating cavity 300 The first electrode lead-out part 410 of the first pole core group 400 of the string 401 is located on the same side, and one of the pole core strings 401 of the last pole core set 400 in one of the two adjacent accommodating cavities 300 is The second electrode lead-out part 420 is located on the same side as the second electrode lead-out part 420 of the last electrode core group 400 of one of the electrode core strings 401 in the other accommodating cavity 300.
  • the parallel connection between the pole core strings 401 in two adjacent accommodating cavities 300 can save the wiring space of the connecting wires.
  • other parallel connection methods can also be used.
  • two adjacent accommodating cavities 300 are respectively defined as a first accommodating cavity 300 and a second accommodating cavity 300, and a pole core string 401 and a second accommodating cavity 300 are arranged adjacent to the second accommodating cavity 300 in the first accommodating cavity 300
  • a pole core string 401 arranged adjacent to the first accommodating cavity 300 is connected in parallel.
  • a first pole core set 400 of a pole core string 401 in the first accommodating cavity 300 adjacent to the second accommodating cavity 300 and a pole core string 401 in the second accommodating cavity 300 adjacent to the first accommodating cavity 300 The first pole core set 400 of the first accommodating cavity 300 is electrically connected, and the last pole core set 400 of a pole core string 401 disposed adjacent to the second accommodating cavity 300 is adjacent to the first accommodating cavity in the second accommodating cavity 300
  • the last pole core group 400 of a pole core string 401 set at 300 is electrically connected. It can be understood that the use of the above-mentioned connection mode can save the wiring space of the connection line.
  • each accommodating cavity 300 is provided with a pole core string 401
  • the electrical connection of the pole core strings 401 of two adjacent accommodating cavities 300 is similar to the above-mentioned method, and only a brief introduction is given below:
  • only one pole core string 401 is provided in the accommodating cavity 300.
  • the pole core sets 400 in two adjacent accommodating cavities 300 are connected in series as follows: The first pole core set 400 of the pole core string 401 in one of the accommodating cavities 300 is electrically connected to the first pole core set 400 of the pole core string 401 in the other accommodating cavity 300; or, adjacent The last pole core group 400 of the pole core string 401 in one accommodating cavity 300 of the two accommodating cavities 300 is electrically connected to the last pole core set 400 of the pole core string 401 in the other accommodating cavity 300.
  • the first pole core group 400 of the pole core string 401 is the leftmost pole core group 400, and the last pole core group 400 of the pole core string 401 is the rightmost pole core group 400.
  • the first pole core set 400 of the pole core string 401 is the rightmost pole core set 400, and the last pole core set 400 of the pole core string 401 is the leftmost pole core set 400.
  • only one pole core string 401 is provided in the containing cavity 300.
  • the pole core sets 400 in two adjacent containing cavities 300 are connected in parallel as follows:
  • the first pole core group 400 of the pole core string 401 in one of the accommodating cavities 300 is electrically connected to the first pole core set 400 of the pole core string 401 in the other accommodating cavity 300, and two adjacent ones are adjacent to each other.
  • the last pole core group 400 of the pole core string 401 in one accommodating cavity 300 of the two accommodating cavities 300 is electrically connected to the last pole core set 400 of the pole core string 401 in the other accommodating cavity 300.
  • the first pole core group 400 of the pole core string 401 is the leftmost pole core group 400, and the last pole core group 400 of the pole core string 401 is the rightmost pole core group 400.
  • the first pole core set 400 of the pole core string 401 is the rightmost pole core set 400, and the last pole core set 400 of the pole core string 401 is the leftmost pole core set 400.
  • the pole core set 400 includes a pole core set body 430 and a first electrode lead-out part 410 and a second electrode lead-out part 420 for drawing current.
  • the first electrode lead-out part 410 and the second electrode lead-out part 420 are distributed on opposite sides of the pole core set main body 430 along the second direction, and the first pole core set 400 of one of the two adjacent pole core sets 400
  • the electrode lead-out part 410 and the second electrode lead-out part 420 of the other electrode core group 400 are electrically connected through the first conductive member 440;
  • a fixed spacer 450 is provided between the pole core set main bodies 430 of two adjacent pole core sets 400, and the first conductive member 440 is fixed in the fixed spacer 450; the poles of two adjacent pole core sets 400
  • the structure glue is filled between the core group main body 430 and the fixed spacer 450, so that the plurality of pole core groups 400 can be connected into a whole through the structure glue, so that the structural strength of the pole core string 401 can be improved, so that the poles can be easily assembled.
  • the core string 401 is installed in the containing cavity 300.
  • the fixed spacer 450 includes a first spacer 453 and a second spacer 454 arranged opposite to each other along a third direction, and the first conductive member 440 is located between the first spacer 453 and the second spacer 454, The first spacer ring 453 and the second spacer ring 454 are connected to clamp and fix the first conductive member 440 to avoid movement between the pole core groups 400.
  • one of the first spacer 453 and the second spacer 454 is provided with a plug 451 on the surface facing the first conductive member 440, and the other of the first spacer 453 and the second spacer 454 is provided There is a socket 452, the first spacer 453 and the second spacer 454 are inserted into the socket 452 through the plug 451 to be fixedly connected, and the first conductive member 440 is sandwiched between the two.
  • the plurality of pole core groups 400 constituting the pole core string 401 are encapsulated in a packaging film 500;
  • the pole core set 400 includes a pole core set body 430 and a The first electrode lead-out part 410 and the second electrode lead-out part 420 of the electric current, the first electrode lead-out part 410 of one of the two electrode core groups 400 connected in series and the second electrode lead-out part 410 of the other electrode core group 400
  • the connection of the electrode lead-out part 420 is located in the packaging film 500; the packaging film 500 and the first electrode lead-out part 410 and/or the second electrode lead-out part 420 are oppositely formed with a packaging part to connect adjacent
  • the main body 430 of the bipolar core group is isolated.
  • the encapsulation part 510 isolates the plurality of pole core groups 400 to prevent the electrolyte between the plurality of pole core sets 400 from circulating each other, the plurality of pole core sets 400 will not affect each other, and the plurality of pole core sets 400 The electrolyte will not decompose due to excessive potential difference, ensuring the safety and service life of the battery.
  • the packaging part 510 can be implemented in various ways.
  • the packaging film 500 can be tightly tied to form the packaging part 510 with a cable tie, or the packaging film 500 can be directly thermally fused to form the packaging part 510.
  • the specific method of the packaging portion 510 is not particularly limited.
  • the sealing material adopted for the packaging film 500 is a PET and PP composite film or an aluminum plastic film.
  • the pole core assembly 400 will expand after being divided into a volume.
  • the cavity inside the packaging film 500 is pumped under negative pressure to restrain the pole core assembly 400, so the accommodating cavity 300 in the packaging film 500 has Air tightness requirements.
  • each pole core group 400 is respectively encapsulated in a packaging film 500 to form a pole core set 400, and the pole core sets 400 are connected in series.
  • the number of packaging films 500 corresponds to the number of pole core groups 400 one-to-one, and each pole core set 400 is individually packaged in one packaging film 500.
  • a encapsulation film 500 can be separately set outside each pole core group 400, and then 400 pole core groups are connected in series.
  • a heat dissipation channel 210 is provided in the structural beam 200.
  • the heat generated by the pole core assembly 400 can enter the heat dissipation channel 210 and then be transferred to the outside of the box via the top plate 120 and the bottom plate 130.
  • the structural design of the present disclosure increases The heat dissipation space in the box is beneficial to improve the effect of cooling and heat dissipation.
  • the length of the pole core set 400 extends in the second direction, and the thickness of the pole core set 400 extends in the third direction; the surface of the pole core set 400 in the third direction faces the structural beam 200,
  • the extending direction of the heat dissipation channel 210 is the same as the second direction.
  • the surface of the pole core assembly 400 corresponding to the largest area in the thickness direction is close to the structural beam 200, which can increase the heat dissipation efficiency of the pole core assembly 400 by the heat dissipation channel 210 in the structural beam 200.
  • the structural beam 200 includes a first side plate 220 and a second side plate 230 spaced apart along the third direction, the first side plate 220, the second side plate 230, the top plate 120 and the bottom plate 130 collectively enclose the heat dissipation channel 210.
  • the space enclosed by the first side plate 220, the second side plate 230, the top plate 120, and the bottom plate 130 is the heat dissipation channel 210.
  • the heat dissipation channel 210 is formed by the components of the box body and the structural beam 200, without additional heat pipes to form the heat dissipation channel 210120, which saves material, and the heat dissipation channel 210 is formed in the battery pack 10 without affecting the entire battery pack. 10's structural stability.
  • the structural beam 200 further includes a partition plate 240 connected to the first side plate 220 and the second side plate 230, and the partition plate 240 divides the heat dissipation channel 210 into a plurality of sub-channels.
  • the number of partitions 240 is not limited. When there are multiple partitions 240, preferably, the partitions 240 are arranged symmetrically between the first side plate 220 and the second side plate 230. The symmetrical structure can improve the structural beam 200 stability.
  • the box body is provided with a glue injection hole 1010 (as shown in FIG. 1) communicating with the containing cavity 300, and each containing cavity corresponds to at least one glue hole 1010.
  • the glue hole 1010 is used to The cavity 300 is filled with glue to fix the pole core assembly 400 and the box body. Part of the injection hole 1010 is shown in FIG. 1. Hollow glass microbead filling glue or structural glue can be used to fix the pole core assembly 400, the box body and the structural beam 200 together by potting, so as to further improve the structural strength of the battery pack 10.
  • two adjacent pole core groups 400 constituting the pole core string 401 are electrically connected by the first conductive member 440, and the glue injection hole 1010 is provided corresponding to the first conductive member 440.
  • Such a configuration can ensure a high connection strength between the pole core groups 400.
  • the battery pack 10 further includes a sampling component (not shown in the figure).
  • the sampling component is used to collect information of the pole core group 400 so as to understand the current working condition of the pole core group 400.
  • the information of the pole core set 400 includes voltage, current, or temperature information of the pole core set 400, and may also include air pressure information in the accommodating cavity 300.
  • the end of the accommodating cavity along the second direction is provided with a second opening.
  • the group 400 is electrically connected through the second conductive member 460. That is, the first pole core group 400 of one accommodating cavity 300 of the two adjacent accommodating cavities 300 is electrically connected to the first pole core group 400 of the other accommodating cavity 300 through the second conductive member 460, or, The last pole core group 400 of one of the two accommodating cavities 300 is electrically connected to the last pole core group 400 of the other accommodating cavity 300 through the second conductive member 460.
  • the second opening is provided with an insulating fixing member 600 and the second conductive member 460 is fixed on the insulating fixing member 600, and the insulating fixing member 600 can play a role of fixing, supporting and insulating the second conductive member 460.
  • both ends of the accommodating cavity 300 along the second direction are provided with second openings, and the insulating fixing member 600 is provided with two, and they are provided at the corresponding second openings.
  • the second conductive member 460 is provided on a side of the insulating fixing member 600 away from the pole core set 400, and the pole core set 400 includes a first electrode lead-out component for drawing current. 410 and the second electrode lead-out part 420.
  • the first electrode lead-out part 410 and the second electrode lead-out part 420 are distributed on opposite sides of the electrode core set 400 along the second direction, and the two adjacent cavities 300 are located in the same
  • the first electrode lead-out part 410 of one electrode core group 400 and the first electrode lead-out part 410 of the other electrode core group 400 in the two-pole core group 400 at the side and adjacent to the second opening penetrate the insulating fixing part 600 and pass through
  • the second conductive member 460 is electrically connected to realize the parallel connection of the pole core assemblies 400 of two adjacent accommodating cavities 300, and the connection path of this connection mode is relatively short, which is beneficial to reduce the internal resistance.
  • the second electrode lead-out member 420 of a pole core set 400 penetrates the insulating fixing member 600 and is electrically connected by the second conductive member 460, so as to realize the parallel connection of the pole core sets 400 of two adjacent accommodating cavities 300, and
  • the connection path of the connection mode is relatively short, which is beneficial to reduce the internal resistance.
  • the second electrode lead-out part 420 of a pole core set 400 penetrates the insulating fixing member 600 and is electrically connected by the second conductive member 460, so as to realize the series connection of the pole core sets 400 of two adjacent accommodating cavities 300, and
  • the connection path of the connection mode is relatively short, which is beneficial to reduce the internal resistance.
  • the second conductive member 460 is provided with a fixing hole
  • the insulating fixing member 600 is provided with a fixing portion on the side away from the pole core assembly
  • the fixing portion is fixed in the fixing hole to realize the fixing of the second conductive member 460 On the insulating fixing member 600.
  • the second conductive member 460 may also be fixed to the side of the insulating fixing member 600 away from the pole core assembly 400 by gluing.
  • the insulating fixing member 600 is provided with clamping portions 620 (as shown in FIG. 16) on both sides along the first direction, and the insulating fixing member 600 is connected to each other through the clamping portions 620 The structural beam 200 is clamped and fixed, so that the insulating fixing member 600 is connected and fixed to the box body.
  • the clamping portions 620 are arranged oppositely along the first direction, there are multiple clamping portions 620, and the plurality of clamping portions 620 are arranged along the third direction.
  • the arrangement direction of the clamping portions 620 is the same as that of the structural beam 200.
  • the arrangement direction is the same, and they are arranged along the third direction.
  • the end of the structural beam 200 is provided with an extension part 260 arranged opposite to each other along the first direction, the structural beam 200 and the extension part 260 enclose a concave part 250, and the insulating fixing The member 600 is engaged with the extension portion 260 through the clamping portion 620 to be fixed in the concave portion 250.
  • the clamping portion 620 is provided with a groove 621, the extension portion 260 is a clamping block, and the clamping block 620 is clamped in the groove 261.
  • the structural beam 200 includes the first side plate 220 and the second side plate 230 spaced apart along the third direction
  • the extension portion 260 corresponds to two opposite side plate extension portions, and the clamping portion Two grooves 621 are provided on the 620, and two oppositely disposed side plate extensions are respectively clamped in the two grooves 621 respectively.
  • the extension portion 260 is provided with a groove
  • the clamping portion 620 is a clamping block
  • the clamping block 620 is connected in the groove 261.
  • the battery pack 10 further includes a protective cover 700 (as shown in FIG. 15 ), and the protective cover 700 is disposed on a side of the insulating fixing member 600 away from the electrode core assembly 400.
  • the protective cover 700 protects the insulating fixing member 600 and the pole core assembly 400 located in the containing cavity 300 and other components. As shown in FIGS. 1 and 15, the protective cover 700 is located on the inner side of the end plate 112, that is, on the side of the end plate 112 close to the pole core assembly 400.
  • there are two protective covers 700 there are two protective covers 700, the two protective covers 700 are distributed on both sides of the box body 100 along the second direction, one protective cover 700 is located inside the third frame 160, and the other is located on the fourth frame 170 inside.
  • both sides of the protective cover 700 along the first direction are provided with flanging portions 710 (as shown in FIG. 15 and FIG. 17) extending toward the receiving cavity 300, and the insulating fixing
  • One side of the member 600 away from the receiving cavity 300 is provided with a connecting portion 630.
  • the connecting portion 630 is provided on opposite sides of the second conductive member 460 along the first direction. The connecting portion 630 is snap-fitted to connect the protective cover 700 and the insulating fixing member 600 in a fixed manner.
  • a hook 631 is provided on the side of the connecting portion 630 away from the second conductive member 460, a slot 711 is provided on the flange portion 710, and the hook 631 is snapped into the slot 711 to protect
  • the cover 700 is fixedly connected to the insulating fixing member 600.
  • the connecting portion 630 is provided with a latching groove
  • the flange portion 710 is provided with a hook on the side close to the accommodating cavity 300, and the hook is latched in the latching groove, so that the protective cover 700 and the insulating fixing member 600 Fixed connection.
  • an insulating and heat-insulating member 800 is provided in the containing cavity 300.
  • the insulation and heat insulation member 800 is an insulation and heat insulation board, and the insulation and heat insulation board is attached to the surface of the pole core assembly 400 in the thickness direction, and the thickness direction of the pole core assembly 400 is the third direction, that is, the pole core
  • the surface of the group 400 corresponding to the largest area in the thickness direction is attached to the insulating and heat-insulating board, thereby improving the insulating and heat-insulating effect.
  • the insulation and heat insulation member 800 is an insulation and heat insulation coating provided on the inner wall of the containing cavity 300.
  • the battery pack 10 further includes a first general electrode 410a and a second general electrode 420a for drawing current, and the first general electrode 410a and the second general electrode 420a are located at The box body is along the same side of the second direction. Further, the first total electrode 410a and the second total electrode 420a may be led out from the third frame 160 or the fourth frame 170.
  • the electrode core assembly 400 includes a first electrode extraction part 410 and a second electrode extraction part 420 for drawing current, the first electrode extraction part 410 and the second electrode extraction part 420 are distributed in the electrode core assembly 400 along the second direction.
  • a plurality of pole core groups 400 forming a pole core string in the accommodating cavity 300 are arranged along the second direction and connected in series;
  • the plurality of accommodating cavities 300 are arranged along the third direction, and the first electrode lead-out part 410 and the last accommodating cavity of the first electrode core group 400 in the first accommodating cavity 300 arranged in the third direction among the plurality of accommodating cavities 300 are arranged along the third direction
  • the second electrode lead-out part 420 of the first electrode core group 400 in 300 is located on the same side of the box; one of the first electrode lead-out part 410 and the second electrode lead-out part 420 is the first total electrode 410a, and the other It is the second total electrode 420a.
  • one of the first general electrode 410a and the second general electrode 420a is a positive electrode and the other is a negative electrode, so that the positive and negative currents of the entire battery pack 10 are drawn on the same side to facilitate connection with external devices, such as The vehicle's electronic devices are connected.
  • the first electrode lead-out part 410 of the pole core assembly 400 is located on the same side of the box.
  • One of the first electrode lead-out part 410 and the second electrode lead-out part 420 is the first total electrode 410a, and the other is the second total electrode 420a.
  • one of the first general electrode 410a and the second general electrode 420a is a positive electrode and the other is a negative electrode, so that the positive and negative currents of the entire battery pack 10 are drawn on the same side to facilitate connection with external devices, such as The vehicle's electronic devices are connected.
  • a suction hole 190 is provided on the box body (as shown in FIG. 2).
  • the number of the suction holes 190 may be one or multiple, and may be arranged at a position of the top plate 120 or the bottom plate 130 corresponding to the receiving cavity 300, or on the third frame 160 and the fourth frame 170.
  • a plurality of air extraction holes 190 are provided on the box body, and the plurality of air extraction holes 190 are respectively communicated with the plurality of accommodating cavities 300. That is to say, each accommodating cavity 300 can be evacuated through the corresponding evacuating hole 190. For example, when there are 14 accommodating cavities, there are also 14 suction holes 190.
  • a plurality of accommodating cavities 300 are in communication with each other, and the box body is provided with at least one suction hole communicating with the accommodating cavity 300. That is to say, one or more can be set on the box.
  • the box body is provided with at least one suction hole communicating with the accommodating cavity 300. That is to say, one or more can be set on the box.
  • the air extraction hole 190 since a plurality of accommodating cavities 300 are connected to each other, when only the air extraction hole 190 is pumped, the entire accommodating cavity 300 in the box can be evacuated.
  • FIG. 21 it is shown that the top plate 120 corresponding to the sidemost accommodating cavity 300 is provided with a suction hole 190.
  • the one suction hole 190 may also be provided in another position of the box.
  • the three air extraction holes 190 can be evenly arranged on the box body, and the three air extraction holes 190 can be pumped at the same time, which can speed up the vacuuming speed.
  • the number of suction holes can be set according to actual needs.
  • a through hole is opened on the structural beam 200 to connect two adjacent accommodating cavities 300 in communication.
  • the end of the structural beam 200 in the second direction is provided with a recess 250 (as shown in FIG. 16) that is recessed away from the third frame 160 or the fourth frame 170, and two adjacent accommodating cavities 300 pass The recess 250 communicates with each other.
  • the box body 100 includes a top plate 120 and a bottom plate 130 oppositely arranged along a first direction, and a first frame 140 distributed on both sides of the top plate 120 and both sides of the bottom plate 130 along a third direction.
  • the second frame 150; the suction holes 190 are provided on the top plate 120 and/or the bottom plate 130.
  • the air extraction holes 190 are provided on the top plate 120, and in order to avoid the short distance between the air extraction holes 190 and affect the structural strength of the top plate 120, the air extraction holes 190 can be evenly distributed on the top plate 120, as shown in FIG.
  • the dotted line in 20 is provided with a suction hole 190 on the top plate 120 corresponding to each accommodating cavity 300.
  • a suction hole 190 may be provided on the top plate 120 corresponding to the spaced accommodating cavities 300, and a suction hole 190 may be provided on the bottom plate 130 corresponding to the remaining spaced accommodating cavities 300.
  • the box body further includes a third frame 160 and a fourth frame 170 that are distributed at both ends of the box body 100 along the second direction of the box body 100, and the two ends of the box body 100 along the second direction A first opening 180 is provided.
  • the third frame 160 and the fourth frame 170 are hermetically connected with the box body 100 to close the corresponding first opening 180; the second direction is parallel to the extension direction of the structural beam 200;
  • the air hole 190 is provided on the third frame 160 or the fourth frame 170.
  • the suction hole 190 is provided on the third frame 160.
  • the embodiment of the present disclosure also provides an electric vehicle 1, as shown in FIG. 23, which includes a vehicle body 20 and the above-mentioned battery pack, and the battery pack 10 is fixed to the vehicle body 20 through a mounting portion.
  • the structural strength of the battery pack 10 can be used as a part of the structural strength of the entire vehicle, thereby improving the structural strength of the entire vehicle. Conducive to the realization of electric vehicles. Lightweight design requirements also reduce the design and manufacturing costs of the entire vehicle.
  • the height of the battery pack of the embodiment of the present disclosure is relatively low, so that it does not occupy too much space at the height of the vehicle.

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  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本公开提供了一种电池包和电动车，电池包包括密封的箱体以及位于箱体内的至少一个结构梁、多个相互电连接的极芯串；箱体包括箱本体，箱本体包括沿第一方向相对设置的顶板和底板，结构梁位于顶板与底板之间，至少一个结构梁将箱体内部分隔为多个容纳腔，至少一个结构梁连接于顶板和底板，至少一个容纳腔内设有至少一个极芯串；容纳腔的气压低于箱体外的气压；箱体上设有安装部，安装部用于与外部负载连接固定；极芯串包括多个沿第二方向依次排布且串联的极芯组；极芯组封装于封装膜内；极芯串的长度方向沿第二方向延伸。

Description

电池包及电动车
相关申请的交叉引用
本公开要求比亚迪股份有限公司于2020年04月24日提交的、发明名称为“电池包及电动车”的中国专利申请号“202010333329.5”的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及电池领域，具体涉及一种电池包及电动车。
背景技术
随着新能源汽车的不断普及，对新能源汽车中动力电池的使用要求变得越来越高。传统的电池包采用的是将电池模组安装到电池包箱体内，形成电池包结构。其中，电池模组包括多个依次排列的单体电池构成的电池组、设置于电池组两侧的侧板和设置于电池组两端的端板。侧板与端板通过螺栓或者拉杆或者焊接的方式连接，以实现对电池组的固定。电池模组在组装完成后再通过螺栓等紧固件安装于电池包箱体内。这种先将电池组装成电池模组，再将电池模组安装在电池包箱体内的组装方式存在组装过程繁琐、组装工序复杂的问题，导致人力、物力等成本的增加。电池模组本身的结构部件也会导致电池包重量大，降低了电池包内部空间利用率。此外，电池包内的水汽等物质也会影响电池包内的各零部件的使用寿命。
发明内容
在本公开实施例的第一个方面，提供一种电池包，所述电池包包括密封的箱体以及位于所述箱体内的至少一个结构梁、多个相互电连接的极芯串；
所述箱体包括箱本体，所述箱本体包括沿第一方向相对设置的顶板和底板，所述第一方向为所述箱体的高度方向，所述结构梁位于所述顶板与所述底板之间，至少一个所述结构梁将所述箱体内部分隔为多个容纳腔，至少一个所述结构梁连接于所述顶板和所述底板，至少一个所述容纳腔内设有至少一个所述极芯串；所述容纳腔的气压低于所述箱体外的气压；
所述箱体上设有安装部，所述安装部用于与外部负载连接固定；
所述极芯串包括多个沿第二方向依次排布且串联的极芯组；所述极芯组封装于封装膜内；所述极芯串的长度方向沿第二方向延伸；所述第二方向为所述箱体的宽度方向或者所 述第二方向为所述箱体的长度方向。
本公开实施例第一方面的有益效果：本公开采用的极芯串，其省略了现有技术中的电池外壳和电池模组的固定结构，从而可提高电池包的空间利用率，减轻电池包的重量，提高电池包的能量密度，而且本公开的电池包结构简单，组装效率高，有利于降低生产成本；再者，本公开实施例的电池包的箱体，结构梁位于顶板与底板之间，且结构梁连接于顶板和底板，如此设计使得结构梁、顶板及底板三者构成“工”字型结构，这种结构具有较高的强度和刚度，从而可满足电池包的箱体的承重、抗撞击以及抗挤压等性能的要求。并且，本公开实施例的电池包的箱体的结构比较简单、制作成本较低，而且空间利用率较高。另外，结构梁将箱体分隔为多个容纳腔，当其中某个容纳腔内电芯组件或单体电池发生热失控时，不会影响其他容纳腔，这样可提高电池包工作的安全性。此外，当将这种电池包安装到整车上时，该电池包的结构强度可以作为整车结构强度的一部分，从而可提升整车的结构强度，有利于实现电动汽车整车轻量化的设计要求，同时也降低整车的设计和制造成本；此外，将电池包箱体内的容纳腔内部进行抽真空处理，避免水汽、氧气对箱体中极芯组及各零部件的长时间老化作用，提高箱体内部极芯组或者各零部件的使用寿命。
在本公开实施例的第二个方面，提供一种电动车，包括车体和上面所述的电池包，所述电池包固定于所述车体。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本公开一实施例提供的一种电池包的结构示意图。
图2为本公开一实施例提供的一种将极芯组装入箱体的结构示意图。
图3为本公开一实施例提供的一种极芯串的结构示意图。
图4a为本公开一实施例提供的一种极芯组及固定隔圈连接的结构示意图。
图4b为本公开一实施例提供的一种极芯组及固定隔圈连接的立体分解图。
图5为本公开一实施例提供的一种同一个容纳腔内的两个极芯串串联的结构示意图。
图6为本公开一实施例提供的另一种同一个容纳腔内的两个极芯串串联的结构示意图。
图7为本公开一实施例提供的一种同一个容纳腔内的两个极芯串并联的结构示意图。
图8为本公开一实施例提供的一种两个容纳腔内的两个极芯串串联的结构示意图。
图9为本公开一实施例提供的一种两个容纳腔内的两个极芯串并联的结构示意图。
图10为本公开一实施例提供的另一种两个容纳腔内的两个极芯串串联的结构示意图。
图11为本公开一实施例提供的另一种两个容纳腔内的两个极芯串并联的结构示意图。
图12为本公开一实施例提供的一种封装膜封装极芯组的结构示意图。
图13为本公开另一实施例提供的一种封装膜封装极芯组的结构示意图。
图14为图2中M部分的放大图。
图15为本公开一实施例提供的一种电池包的立体分解图。
图16为图15中N部分的放大图。
图17为本公开一实施例提供的绝缘固定件和保护盖的局部的立体分解图。
图18为本公开一实施例提供的一种将绝缘隔热件装入箱体的结构示意图。
图19为本公开一实施例提供的另一种省略了第三边框和第四边框的电池包的结构示意图。
图20为本公开一实施例提供的电池包中抽气孔分布的结构示意图。
图21为本公开另一实施例提供的电池包中抽气孔分布的结构示意图。
图22为本公开又一实施例提供的电池包中抽气孔分布的结构示意；
图23为本公开又一实施例提供的电动车的结构示意图。
附图标记
电动车1；
10、电池包；
100、箱本体；110、安装部；111、安装孔；120、顶板；130、底板；140、第一边框；150、第二边框；141、加强板；160、第三边框；170、第四边框；180、第一开口；190、抽气孔；1010、注胶孔；112、端板；
200、结构梁；210、散热通道；250、凹部；260、延伸部；220、第一侧板；230、第二侧板；240、隔板；
300、容纳腔；
400、极芯组；401、极芯串；410、第一电极引出部件；420、第二电极引出部件；430、极芯组主体；440、第一导电件；450、固定隔圈；451、插销；452、插孔；453、第一隔圈；454、第二隔圈；460、第二导电件；
500、封装膜；510、封装部；
600、绝缘固定件；620、卡接部；621、凹槽；630、连接部；631、卡钩；
700、保护盖；710、翻边部；711、卡槽；
800、绝缘隔热件；
车体20。
具体实施方式
以下所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本公开的保护范围。
在本公开的描述中，需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本公开中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
请参阅图1至图3，本公开第一实施例提供一种电池包10，所述电池包10包括密封的箱体以及位于所述箱体内的至少一个结构梁200(如图2所示)、多个相互电连接的极芯串401。所述箱体包括箱本体100，所述箱本体100包括包括沿第一方向相对设置的顶板120和底板130，所述第一方向为所述箱体100的高度方向，所述结构梁200位于所述顶板120与所述底板130之间，至少一个所述结构梁200将所述箱体内部分隔为多个容纳腔300，至少一个所述结构梁200连接于所述顶板120和所述底板130，至少一个所述容纳腔300内设有至少一个所述极芯串401；所述容纳腔300的气压低于所述箱体外的气压；所述箱体上设有安装部110，所述安装部110用于与外部负载连接固定。所述极芯串401包括多个沿第二方向依次排布且串联的极芯组400；所述极芯组400封装于封装膜500内(如图12或图13所示)；所述极芯串401的长度方向沿第二方向延伸；所述第二方向为所述箱体的宽度方向或者所述第二方向为所述箱体的长度方向。其中，第一方向为图中X方向，第二方向为图中Z方向。
而本公开实施例省略了电池外壳和电池模组的固定结构，从而可提高电池包10的空间利用率，减轻电池包10的重量，提高电池包10的能量密度，而且本公开的电池包10结构简单，组装效率高，有利于降低生产成本；再者，本公开的电池包10的箱体，结构梁200位于顶板120与底板130之间，且结构梁200连接于顶板120和底板130，如此设计使得结构梁200、顶板120及底板130三者构成“工”字型结构，这种结构具有较高的强度和刚度，从而可满足电池包10的箱体的承重、抗撞击以及抗挤压等性能的要求。并且，本公开的电池包10的箱体的结构比较简单、制作成本较低，而且空间利用率较高。另外，结构梁200将箱体分隔为多个容纳腔300，当其中某个容纳腔300内电芯组件或单体电池发生热失控时，不会影响其他容纳腔300，这样可提高电池包10工作的安全性。此外，当将这种电池包10安装到整车上时，该电池包10的结构强度可以作为整车结构强度的一部分，从而可提升整车的结构强度，有利于实现电动汽车整车轻量化的设计要求，同时也降低整车的设计和制造成本。
此外，在本公开实施例中，容纳腔300的气压低于箱体外的气压。可通过对容纳腔300内部进行抽真空处理，而使容纳腔300的气压低于箱体外的气压，容纳腔300抽真空后，可降低箱体中水汽、氧气等物质的存量，避免水汽、氧气对箱体中极芯组及各零部件的长时间老化作用，有利于提高箱体内部极芯组或者各零部件的使用寿命。
在本公开实施例中，极芯组400包括至少一个极芯。当极芯组400包括两个及以上的极芯时，极芯间并联连接。
在本公开实施例中所提到的极芯，为动力电池领域常用的极芯，极芯以及极芯组400属于电池的组成部分，而不能被理解为电池本身；另外，极芯可以是卷绕形成的极芯，也可以是叠片的方式制成的极芯；一般情况下，极芯至少包括正极片、隔膜和负极片。
另外，结构梁200连接于顶板120和底板130，可以理解为，结构梁200与顶板120及底板130一体成型；或者，结构梁200、顶板120和底板130分别单独制成，然后再通过直接或者间接的连接方式进行连接，对此，本公开实施例不作具体限定。直接连接可以为结构梁200的一端与底板130连接，结构梁200相对的另一端与顶板120连接，例如，可将结构梁200的一端先与底板130焊接，然后再将结构梁200相对的另一端与顶板120焊接。间接连接可以为结构梁200的一端通过中间板与底板130连接，结构梁200相对的另一端与通过中间板与顶板120连接。
在一些实施例中，至少一个结构梁200接合于顶板120和底板130。可以理解为，顶板120、底板130及结构梁200三者一体成型；或者，顶板120和底板130中的一个与结构梁200一体成型，另一个再与结构梁200焊接；或者，结构梁200的一端与底板130焊接，结构梁200相对的另一端与顶板120焊接。
需要说明的是，多个极芯串401相互电连接，可以是相邻两个容纳腔300内的极芯串401串联或并联；也可以是，相间隔的两个容纳腔300内的极芯串401串联或并联；也可以是三个或三个以上的容纳腔300内的极芯串401串联或并联。
另外，每个容纳腔300内的极芯串401的数量、每个极芯串401包含的极芯组400的数量可根据不同的电量需求进行设计。并且，每个容纳腔300内的极芯串401的数量可以相同也可不同。当容纳腔300内设有多个极芯串401时，极芯串401间可以串联、并联或混联。
此外，本公开实施例的电池包10的箱体上设有安装部110，电池包10的箱体通过设置在其上的安装部与外部负载实现可拆卸或不可拆卸的连接固定。通常而言，电池包10的箱体需要与外部负载连接固定，因此对其抗撞击、抗挤压等性能都有特殊的要求，故不能简单将其等同于电池模组或单体电池的外壳。一般地，电池包10还包括电池管理系统(BMS)、电池连接器、电池采样器和电池热管理系统中的至少之一。
在一实施例中，所述容纳腔内的压力为-40KPa至-70KPa。如此设置，可保证降低箱体中水汽、氧气等物质的存量，避免水汽、氧气对箱体中极芯组及各零部件的长时间老化作用，有利于提高箱体内部极芯组或者各零部件的使用寿命。同时该压力值还可保证极芯组的离子良好传导，以利于提高循环使用寿命。
在一实施例中，如图2所示，所述结构梁200设有多个，多个所述结构梁200沿第三方向间隔分布，所述结构梁200的长度沿第二方向延伸，所述第三方向与所述第一方向、第二方向不同，每个所述结构梁200连接于所述顶板120和所述底板130。
可以理解的，当每个结构梁200连接于顶板120和底板130，每个结构梁200、顶板120及底板130构成“工”字型结构这种结构具有较高的强度和刚度，从而可满足箱体的承重、抗撞击以及抗挤压等性能的要求。当将这种电池包10安装到整车上时，该电池包10的结构强度可以作为整车结构强度的一部分，从而可提升整车的结构强度，有利于实现电动汽车整车轻量化的设计要求，同时也降低整车的设计和制造成本。
在本公开实施例中，第一方向为箱体100的高度，第二方向为箱体100的宽度方向，第三方向为箱体100的长度方向；或者，第二方向为箱体100的长度方向，第三方向为箱体100的宽度方向。其中第一方向为图中X方向，第二方向为图中Z方向，第三方向为图中Y方向。
然而，在其他实施例中，第一方向、第二方向和第三方向中的任意两者也可呈其他夹角设置，例如80°或者85°，对此，本公开实施例不作具体限定。
需要说明的是，结构梁200连接于顶板120和底板130，可以理解为，结构梁200与顶板120及底板130一体成型；或者，结构梁200、顶板120和底板130分别单独制成，然 后再通过直接或者间接的连接方式进行连接，对此，本公开实施例不作具体限定。
在一实施例中，箱本体与结构梁一体成型。如此设置，不仅加工工艺简单，有利于降低生产成本，而且还可保证箱体具有足够的结构强度和刚度，以满足箱体的承重、抗撞击以及抗挤压等性能的要求。
具体的，顶板、底板和结构梁一体成型制成。在另一实施例中，底板与结构梁一体成型，然后顶板再与结构梁焊接。或者，顶板与结构梁一体成型，然后底板再与结构梁焊接。
在一实施例中，所述容纳腔300沿第二方向的长度大于500mm，进一步地，所述容纳腔300沿第二方向的长度为500mm-2500mm。如此设计，可使得设置在容纳腔300内的极芯串401的长度更长，也即可容纳更多的极芯组400，以使电池包10满足较大的容量和较高的空间利用率的要求。
进一步地，所述容纳腔300沿第二方向的长度为1000mm-2000mm。
进一步地，所述容纳腔300沿第二方向的长度为1300mm-2200mm。
在一实施例中，如图1及图2所示，所述箱本体100还包括沿第三方向分布于箱本体100两侧的第一边框140和第二边框150，所述第二方向为所述箱体100的长度方向，所述第三方向为所述箱体100的宽度方向；或者，所述第二方向为所述箱体100的宽度方向，所述第三方向为所述箱体100的长度方向。
具体地，箱本体100包括沿第一方向相对设置的顶板120和底板130、以及沿第三方向相对设置的第一边框140和第二边框150，顶板120、第一边框140、底板130及第二边框150相连。
需要说明的是，顶板120、第一边框140、底板130及第二边框150相连，可以是通过直接或者间接的连接方式进行连接。其中，直接连接可以理解为，顶板120、第一边框140、底板130及第二边框150共同围成容纳空间，结构梁200位于该容纳空间内。优选地，顶板120、第一边框140、底板130和第二边框150一体成型，如此设置，可保证箱体具有较高的结构强度，同时加工相对简单，有利于降低生产成本。当然，顶板120、第一边框140、底板130及第二边框150也可分别单独制成，然后再进行连接。至于间接连接的方式，例如，可以是通过连接板进行连接，对此，本公开实施例不作具体限定。
在一实施例中，顶板120、第一边框140、底板130、第二边框150和结构梁200一体成型，例如，采用一体式铝型材挤压成型。这样不仅可以保证电池包10的箱体具有较高的结构强度，而且还可简化其制作工艺、降低加工成本。
在进一步的实施例中，第一边框140和第二边框150至少之一具有空腔，空腔内设有加强板141，加强板141将空腔分隔成多个子腔。如此设置，可保证第一边框140和第二边框150具有一定的强度，有利于提高电池包10的抗撞击和抗挤压的强度。
在进一步的实施例中，所述第一边框140和所述第二边框150上设有安装部110，所述安装部110用于与外部负载连接固定。
当然，在其他实施例中，安装部110也可设置顶板120或底板130上。
在一实施例中，如图2所示，安装部110为设置在第一边框140和第二边框150上的安装孔111。安装孔111用于供紧固件(例如螺栓或铆钉)穿设，以将电池包10连接固定于外部负载上。
具体地，设置在第一边框140上的安装孔111沿第一方向贯穿第一边框140，设置在第二边框150上的安装孔111沿第一方向贯穿第二边框150。然而，安装孔111的轴向与第一方向也可呈夹角设置，例如5°或10°。
进一步地，安装孔111设有多个，设置在第一边框140上的安装孔111沿第一边框140的长度方向依次排布。其中，第一边框140的长度方向与第二方向平行。
同样，设置在第二边框150上的安装孔111沿第二边框150的长度方向依次排布。其中，第二边框150的长度方向与第二方向平行。
当然，在另一实施例中，安装部110为设置在第一边框140和第二边框150上的吊环。吊环与车体固定连接，以将电池包10连接固定于外部负载上。
然而，在另一实施例中，安装部110为设置在第一边框140和第二边框150上的安装块，安装块可通过焊接的方式固定于车体上。当然，安装块也可通过胶粘或卡接固定于外部负载上。
在一实施例中，如图1及图2所示，所述箱本体100沿第二方向的端部设有第一开口180；所述箱体还包括封闭所述第一开口180的端板112。可以理解的，极芯串401可通过该第一开口180安装于容纳腔300内，这种安装方式比较便于操作，同时可保证箱体100具有较高的结构强度。
进一步地，所述箱本体100沿第二方向的两端均设有第一开口180；所述端板112包括第三边框160和第四边框170，所述第三边框160和所述第四边框170与所述箱本体100密封连接以封闭对应的所述第一开口180。也即，第三边框160和第四边框170沿第二方向分布于箱本体100的两端，第三边框160与箱本体100密封连接以封闭邻近第三边框160设置的第一开口180，第四边框170与箱本体100密封连接以封闭邻近第四边框170设置的第一开口180。可以理解的，当箱本体100沿第二方向的两端均设有第一开口180时，位于容纳腔300内极芯串401的第一电极和第二电极(也即正电极和负电极)可分别从两个第一开口180处引出。
进一步地，所述箱本体100、所述第三边框160、所述第四边框170为金属件，并通过焊接密封连接。
然而，在其他实施例中，箱本体100、第三边框160及第四边框170也可采用塑料制作。并且，第三边框160和第四边框170均与箱本体100也可通过胶粘或卡接等方式密封连接。
进一步地，第三边框160和第四边框170内部为中空结构，第三边框160和第四边框170内设有加强板，加强板将第三边框160和第四边框170的内部空间分隔成多个子腔。如此设置，可保证第三边框160和第四边框170具有一定的强度，有利于提高电池包10的箱体100抗撞击和抗挤压的强度。
在一实施例中，所述电池包10还包括密封板，所述容纳腔300沿第二方向的端部设有第二开口，所述密封板位于所述端板的内侧，所述密封板与结构梁200及箱本体10连接，以封堵第二开口邻近所述底板130的一部分。也即，通过密封板实现半封堵第二开口，这样可避免当封装膜500由于意外破裂时，电解液从一个容纳腔300内流到另一容纳腔300内而造成内部短路，进而提高电池包10使用的安全性。
其中，多个容纳腔300中位于两端的容纳腔300的第二开口的半封堵，可以是密封板与第一边框140、底板130及结构梁200连接，或者，密封板与第二边框150、底板130及结构梁200连接，以封堵容纳腔300的第二开口邻近底板130的一部分。
多个容纳腔300中其余容纳腔300的第二开口的半封堵，可以是密封板与底板130及相邻两个结构梁200连接，以封堵容纳腔300的第二开口邻近底板130的一部分。
在一实施例中，如图所示，所述电池包10还包括密封板，所述容纳腔沿第二方向的端部设有第二开口，所述密封板位于所述端板的内侧，所述密封板与结构梁200及箱本体100连接，以完全封堵容纳腔300的第二开口。也即，通过密封板实现完全封堵容纳腔300的第二开口，以进一步提高电池包10使用的安全性。
其中，多个容纳腔300中位于两端的容纳腔300的第二开口的完全封堵，可以是密封板与第一边框140、结构梁200、顶板120及底板130连接，或者，密封板与第二边框150、结构梁200、顶板120及底板130连接，以完全封堵容纳腔300的第二开口。
多个容纳腔300中其余容纳腔300的第二开口的完全封堵，可以是密封板与底板130、顶板120及相邻两个结构梁200连接，以完全封堵容纳腔300的第二开口。
在一实施例中，如图2及图3所示，所述极芯串401的长度大于400mm，进一步地，所述极芯串401的长度为400mm-2500mm。进一步地，极芯串401的长度为1000mm-2000mm。进一步地，极芯串401的长度为1300mm-2200mm。可以理解的，在容纳腔300内设置多个极芯组400串联成极芯串401，与现有的只设置一个与极芯串401相同长度的极芯组400相比，可以减小内阻。因为，一旦极芯组400越长，用作集流体的铜铝箔的长度即会相应增加，大大提高了内部的电阻，无法满足当前越来越高的功率及快充的要求，而采用本公开实施例的多个极芯组400串联的方式可避免产生上述问题。
请参阅图4a和图4b，在进一步的实施例中，所述极芯组400包括用于引出电流的第一电极引出部件410和第二电极引出部件420，所述第一电极引出部件410和第二电极引出部件420沿第二方向分布于极芯组400的相对两侧，相邻两个极芯组400中的一个极芯组400的第一电极引出部件410与另一极芯组400的第二电极引出部件420电连接，以使相邻两个极芯组400串联。也即，多个极芯组400采用“头尾相连”的排布方式，此排布方式可以较为方便地实现极芯组400之间的两两串联，连接结构简单。
在一实施例中，如图2所示，所述容纳腔300内设有多个所述极芯串401，多个极芯串401沿极芯组400的厚度方向依次排布且电连接，所述极芯组400的厚度方向与第三方向平行。这样，可使得容纳腔300内设置较多的极芯串401，以满足实际使用的需求。
下面具体介绍同一容纳腔300内的多个极芯串401电连接的几种情形，需要说明的是以下只是举例介绍，本公开实施例的实施方式并不局限于此：
请参阅图5和图6，在进一步的实施例中，同一所述容纳腔300内的多个所述极芯串401串联连接。
相邻两个极芯串401中的一个极芯串401的第一个极芯组400与另一个极芯串401的第一个极芯组400电连接。或者，相邻两个极芯串401中的一个极芯串401的最后一个极芯组400与另一个极芯串401的最后一个极芯组400电连接。如图5和图6所示，两个极芯串401中最左边的为第一个极芯组400，最右边的为最后一个极芯组400。
进一步地，相邻两个极芯串401中的一个极芯串401的第一个极芯组400的第一电极引出部件410与另一个极芯串401的第一个极芯组400的第二电极引出部件420位于同一侧(如图5所示)。或者，相邻两个极芯串401中的一个极芯串401的最后一个极芯组400的第二电极引出部件420与另一个极芯串401的最后一个极芯组400的第一电极引出部件410位于同一侧(如图6所示)。
在同一个容纳腔300内的极芯串401之间采用上述连接方式串联连接可以节约连接线的布线空间。在其他实施例中，也可以采用其他串联连接方式。
请参阅图7，在进一步的实施例中，同一所述容纳腔300内的多个极芯串401并联连接。
相邻两个极芯串401中的一个极芯串401的第一个极芯组400与另一极芯串401的第一个极芯组400电连接，且相邻两个极芯串401中的一个极芯串401的最后一个极芯组400与另一极芯串401的最后一个极芯组400电连接。如图7所示，两个极芯串401中最左边的为第一个极芯组400，最右边的为最后一个极芯组400。
具体的，相邻两个极芯串401中的一个极芯串401的第一极芯组400的第一电极引出部件410与另一个极芯串401的第一极芯组400的第一电极引出部件410位于同一侧，且相邻两个极芯串401中的一个极芯串401的最后一个极芯组400的第二电极引出部件420 与另一个极芯串401的最后一个极芯组400的第二电极引出部件420位于同一侧。
在同一个容纳腔300内的极芯串401之间采用上述连接方式并联连接，可以节约连接线的布线空间。在其他实施例中，也可以采用其他并联连接方式。
进一步地，下面具体介绍一下相邻两个容纳腔300的极芯串401电连接的几种情形，需要说明的是以下只是举例介绍，本公开实施例的实施方式并不局限于此：
请参阅图8，在进一步的实施例中，相邻两个容纳腔300内的极芯串401串联连接。
相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的第一个极芯组400与另一个容纳腔300内的其中一个极芯串401的第一个极芯组400电连接；或者，相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的最后一个极芯组400与另一个容纳腔300内的其中一个极芯串401的最后一个极芯组400电连接。在图8中，极芯串401的第一极芯组400为最左边的极芯组400，极芯串401的最后一个极芯组400为最右边的极芯组400。或者，极芯串401的第一极芯组400为最右边的极芯组400，极芯串401的最后一个极芯组400为最左边的极芯组400。在图8中示出了每个容纳腔300中包括三个极芯串401的情形，并且是将两个容纳腔300中的间隔位置最近的两个极芯串401电连接；在其他实施例中，容纳腔300中可包括1个或者不同于3个极芯串401的情形，当容纳腔300中包括多个极芯串401时，还可包括将其中一个容纳腔300在第三方向的第一个极芯串401与另一个容纳腔300在第三方向的第二个极芯串401电连接，也就是说可以不是两个容纳腔300中的间隔位置最近的两个极芯串401电连接。
在进一步的实施例中，相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的第一个极芯组400的第一电极引出部件410与另一个容纳腔300内的其中一个极芯串401的第一个极芯组400的第二电极引出部件420位于同一侧；
或者，相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的最后一个极芯组400的第一电极引出部件410与另一个容纳腔300内的其中一个极芯串401的最后一个极芯组400的第二电极引出部件420位于同一侧。
在相邻两个容纳腔300内的极芯串401之间采用上述连接方式串联连接可以节约连接线的布线空间。在其他实施例中，也可以采用其他串联连接方式。
在一些优选地的实施例中，相邻两个容纳腔300分别定义为第一容纳腔300和第二容纳腔300，第一容纳腔300内邻近第二容纳腔300设置的一个极芯串401与第二容纳腔300内邻近第一容纳腔300设置的一个极芯串401串联连接。
具体地，第一容纳腔300内邻近第二容纳腔300设置的一个极芯串401的第一个极芯组400与第二容纳腔300内邻近第一容纳腔300设置的一个极芯串401的第一个极芯组400电连接。
或者，第一容纳腔300内邻近第二容纳腔300设置的一个极芯串401的最后一个极芯组400与第二容纳腔300内邻近第一容纳腔300设置的一个极芯串401的最后一个极芯组400电连接。
可以理解的，采用上述的连接方式可以节约连接线的布线空间。
请参阅图9，在进一步的实施例中，相邻两个容纳腔300内的极芯串401并联连接。
相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的第一个极芯组400与另一个容纳腔300内的其中一个极芯串401的第一个极芯组400电连接，且相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的最后一个极芯组400与另一个容纳腔300内的其中一个极芯串401的最后一个极芯组400电连接。在图9中，极芯串401的第一极芯组400为最左边的极芯组400，极芯串401的最后一个极芯组400为最右边的极芯组400。或者，极芯串401的第一极芯组400为最右边的极芯组400，极芯串401的最后一个极芯组400为最左边的极芯组400。
具体的，相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的第一极芯组400的第一电极引出部件410与另一个容纳腔300内的其中一个极芯串401的第一极芯组400的第一电极引出部件410位于同一侧，且相邻两个容纳腔300中的一个容纳腔300内的其中一个极芯串401的最后一个极芯组400的第二电极引出部件420与另一个容纳腔300内的其中一个极芯串401的最后一个极芯组400的第二电极引出部件420位于同一侧。
在相邻两个容纳腔300内的极芯串401之间采用上述连接方式并联连接可以节约连接线的布线空间。在其他实施例中，也可以采用其他并联连接方式。
优选地，相邻两个容纳腔300分别定义为第一容纳腔300和第二容纳腔300，第一容纳腔300内邻近第二容纳腔300设置的一个极芯串401与第二容纳腔300内邻近第一容纳腔300设置的一个极芯串401并联连接。
具体地，第一容纳腔300内邻近第二容纳腔300设置的一个极芯串401的第一个极芯组400与第二容纳腔300内邻近第一容纳腔300设置的一个极芯串401的第一个极芯组400电连接，且第一容纳腔300内邻近第二容纳腔300设置的一个极芯串401的最后一个极芯组400与第二容纳腔300内邻近第一容纳腔300设置的一个极芯串401的最后一个极芯组400电连接。可以理解的，采用上述的连接方式可以节约连接线的布线空间。
至于每个容纳腔300内设有一个极芯串401，相邻两个容纳腔300的极芯串401电连接的方式与上述方式类似，以下只做简单介绍：
在一些实施方式中，如图10所示，容纳腔300内只设有一个极芯串401，此时相邻两个容纳腔300内的极芯组400串联连接的方式为：相邻两个容纳腔300中的一个容纳腔300内的极芯串401的第一个极芯组400与另一个容纳腔300内的极芯串401的第一个极芯组 400电连接；或者，相邻两个容纳腔300中的一个容纳腔300内的极芯串401的最后一个极芯组400与另一个容纳腔300内的极芯串401的最后一个极芯组400电连接。在图10中，极芯串401的第一极芯组400为最左边的极芯组400，极芯串401的最后一个极芯组400为最右边的极芯组400。或者，极芯串401的第一极芯组400为最右边的极芯组400，极芯串401的最后一个极芯组400为最左边的极芯组400。
在一些实施方式中，如图11所示，容纳腔300内只设有一个极芯串401，此时相邻两个容纳腔300内的极芯组400并联连接的方式为：相邻两个容纳腔300中的一个容纳腔300内的极芯串401的第一个极芯组400与另一个容纳腔300内的极芯串401的第一个极芯组400电连接，且相邻两个容纳腔300中的一个容纳腔300内的极芯串401的最后一个极芯组400与另一个容纳腔300内的极芯串401的最后一个极芯组400电连接。在图11中，极芯串401的第一极芯组400为最左边的极芯组400，极芯串401的最后一个极芯组400为最右边的极芯组400。或者，极芯串401的第一极芯组400为最右边的极芯组400，极芯串401的最后一个极芯组400为最左边的极芯组400。
请再次参阅图4a和图4b，在进一步的实施例中，所述极芯组400包括极芯组主体430和用于引出电流的第一电极引出部件410及第二电极引出部件420，所述第一电极引出部件410和第二电极引出部件420沿第二方向分布于所述极芯组主体430的相对两侧，相邻两个极芯组400中的其中一个极芯组400的第一电极引出部件410和另一个极芯组400的第二电极引出部件420之间通过第一导电件440电连接；
相邻两个极芯组400的极芯组主体430之间设有固定隔圈450，所述第一导电件440固定于所述固定隔圈450内；相邻两个极芯组400的极芯组主体430与所述固定隔圈450之间填充有结构胶，这样通过结构胶可将多个极芯组400连接成一个整体，从而可提高极芯串401的结构强度，以便于将极芯串401安装于容纳腔300内。
所述固定隔圈450包括沿第三方向相对设置的第一隔圈453和第二隔圈454，所述第一导电件440位于所述第一隔圈453和第二隔圈454之间，所述第一隔圈453与第二隔圈454连接以夹持固定所述第一导电件440，以避免极芯组400间的窜动。
在本实施例中，第一隔圈453和第二隔圈454的其中一个朝向第一导电件440的表面上设有插销451，第一隔圈453和第二隔圈454的另一个上设有插孔452，第一隔圈453和第二隔圈454通过插销451插入插孔452以固定连接，并将第一导电件440夹设在两者之间。
请参阅图12，在进一步的实施例中，组成极芯串401的所述多个极芯组400封装于一个封装膜500内；所述极芯组400包括极芯组主体430以及用于引出电流的第一电极引出部件410和第二电极引出部件420，串联连接的两个极芯组400中的其中一个极芯组400 的第一电极引出部件410和另外一个极芯组400的第二电极引出部件420的连接处位于所述封装膜500内；所述封装膜500与所述第一电极引出部件410和/或所述第二电极引出部件420相对位置形成有封装部以将相邻两极芯组主体430隔离。
通过封装部510将多个极芯组400之间隔离，避免多个极芯组400间的电解液互相流通，多个极芯组400之间不会相互影响，且多个极芯组400中的电解液不会因电位差过大而分解，保证电池的安全性和使用寿命。
封装部510可以多种实施方式，例如可以采用扎带将封装膜500扎紧形成封装部510，也可以直接将封装膜500热熔融连接形成封装部510。封装部510的具体方式不作特殊限定。
在本公开实施例中，封装膜500采用的密封材质为PET和PP复合膜或铝塑膜。而采用极芯组400分容化成后会膨胀，在本公开实施例中，将封装膜500内部的腔体抽负压对极芯组400进行约束，因此对封装膜500内的容纳腔300有气密性要求。
请参阅图13，在另一些的实施例中，每个极芯组400分别封装于一个封装膜500内以形成极芯组400件，所述极芯组400件间串联。
换句话说，封装膜500的数量与极芯组400的数量一一对应，每个极芯组400单独封装在一个封装膜500，该种实施方式，在多个极芯组400制备完成后，可在每个极芯组400外单独套一个封装膜500，然后极芯组400件再串联。
请参阅图14，在进一步的实施例中，所述结构梁200内设有散热通道210。这样，极芯组400产生的热量可进入散热通道210内后经由顶板120和底板130传递至箱体外，与采用实心结构设计的结构梁200相比，本公开的这种结构设计增大了箱体内的散热空间，从而有利于提高冷却散热的效果。
进一步的，所述极芯组400的长度沿第二方向延伸，所述极芯组400的厚度沿第三方向延伸；所述极芯组400沿第三方向的表面朝向所述结构梁200，所述散热通道210的延伸方向与第二方向相同。也就是说，极芯组400沿厚度方向所对应的面积最大的表面与结构梁200相贴近，进而可以加大结构梁200中的散热通道210对极芯组400的散热效率。
在进一步的实施例中，所述结构梁200包括沿第三方向间隔设置的第一侧板220和第二侧板230，所述第一侧板220、第二侧板230、顶板120以及底板130共同围成所述散热通道210。换言之，第一侧板220、第二侧板230、顶板120以及底板130共同围成的空间即为散热通道210。也就是说散热通道210是由箱体的组件和结构梁200构成的，而无需额外设置散热管形成散热通道210120，节约材料，并且散热通道210形成在电池包10中，不会影响整个电池包10的结构稳定性。
在一实施例中，所述结构梁200还包括与所述第一侧板220及第二侧板230连接的隔 板240，所述隔板240将所述散热通道210分隔成多个子通道。其中隔板240的数量不限，当隔板240具有多个时，优选的，将隔板240对称设置在第一侧板220和第二侧板230之间，对称结构可提高结构梁200的稳定性。
在一实施例中，箱体上设有连通容纳腔300的注胶孔1010(如图1所示)，每个容纳腔至少对应一个注胶孔1010，注胶孔1010用于向对应的容纳腔300内填充胶，以将极芯组400以及箱体固定连接。其中图1中示出了部分注胶孔1010。可使用空心玻璃微珠填充胶或结构胶通过灌封的形式把极芯组400、箱体以及结构梁200之间固定连接在一起，进一步提高电池包10的结构强度。
在进一步的实施例中，组成极芯串401的相邻两个极芯组400之间通过第一导电件440电连接，注胶孔1010与第一导电件440对应设置。如此设置，可保证极芯组400间具有较高的连接强度。
在进一步的实施例中，电池包10还包括采样组件(图未示出)，采样组件用于采集极芯组400的信息，以便于了解极芯组400当前的工作状况。所述极芯组400的信息包括极芯组400的电压、电流或者温度信息，还可包括容纳腔300内的气压信息。
请参阅图15至图17，在进一步的实施例中，容纳腔沿第二方向的端部设有第二开口，相邻两个容纳腔300的位于同一侧且邻近第二开口处的两极芯组400通过第二导电件460电连接。也即，相邻两个容纳腔300中的一个容纳腔300的第一个极芯组400与另一容纳腔300的第一个极芯组400通过第二导电件460电连接，或者，相邻两个容纳腔300中的一个容纳腔300的最后一个极芯组400与另一容纳腔300的最后一个极芯组400通过第二导电件460电连接。
在进一步的实施例中，第二开口处设有绝缘固定件600第二导电件460固定于绝缘固定件600上，绝缘固定件600可对第二导电件460起到固定支撑及绝缘的作用。
在一实施例中，容纳腔300沿第二方向的两端均设有第二开口，绝缘固定件600设有两个，且设于对应的第二开口处。
在进一步的实施例中，所述第二导电件460设于所述绝缘固定件600远离所述极芯组400的一侧，所述极芯组400包括用于引出电流的第一电极引出部件410和第二电极引出部件420，所述第一电极引出部件410和第二电极引出部件420沿第二方向分布于极芯组400的相对两侧，相邻两个容纳腔300内的位于同一侧且邻近所述第二开口处的两极芯组400中一个极芯组400的第一电极引出部件410与另一极芯组400的第一电极引出部件410贯穿所述绝缘固定件600并通过所述第二导电件460电连接，以实现相邻两容纳腔300的极芯组400的并联连接，并且该连接方式的连接路径相对较短，有利于减小内阻。
在另一实施例中，相邻两个容纳腔300内的位于同一侧且邻近所述容纳腔300第二开 口处的两极芯组400中一个极芯组400的第二电极引出部件420与另一极芯组400的第二电极引出部件420贯穿所述绝缘固定件600并通过所述第二导电件460电连接，以实现相邻两容纳腔300的极芯组400的并联连接，并且该连接方式的连接路径相对较短，有利于减小内阻。
在另一实施例中，相邻两个容纳腔300内的位于同一侧且邻近所述容纳腔300第二开口处的两极芯组400中一个极芯组400的第一电极引出部件410与另一极芯组400的第二电极引出部件420贯穿所述绝缘固定件600并通过所述第二导电件460电连接，以实现相邻两容纳腔300的极芯组400的串联连接，并且该连接方式的连接路径相对较短，有利于减小内阻。
在进一步的实施例中，第二导电件460上设有固定孔，绝缘固定件600远离极芯组的一侧设有固定部，固定部固定于固定孔内，以实现第二导电件460固定于绝缘固定件600上。当然，在其他实施例中，第二导电件460也可通过胶粘固定于绝缘固定件600远离极芯组400的一侧。
在进一步的实施例中，所述绝缘固定件600沿所述第一方向的两侧设有卡接部620(如图16所示)，所述绝缘固定件600通过所述卡接部620与所述结构梁200卡合固定，进而使绝缘固定件600与箱体连接固定。
具体地，卡接部620沿第一方向相对设置，卡接部620设有多个，多个卡接部620沿第三方向排布，卡接部620的排布方向与结构梁200的排布方向相同，均沿第三方向排布。
在进一步的实施例中，所述结构梁200的端部设有沿所述第一方向相对设置的延伸部260，所述结构梁200与所述延伸部260围成凹部250，所述绝缘固定件600通过所述卡接部620与所述延伸部260卡合以固定在所述凹部250中。
在进一步的实施例中，卡接部620上设有凹槽621，延伸部260为卡块，卡块620卡接于凹槽261内。在本实施例中，由于结构梁200包括沿第三方向间隔设置的第一侧板220和第二侧板230，因此延伸部260对应有两个相对设置的侧板延伸部，而卡接部620上设有两个凹槽621，两个相对设置的侧板延伸部分别对应卡接于两个凹槽621中。在其他一些实施例中，延伸部260内设有凹槽，卡接部620为卡块，卡块卡620接于凹槽261内。
在进一步的实施例中，所述电池包10还包括保护盖700(如图15所示)，所述保护盖700设置于所述绝缘固定件600远离所述极芯组400的一侧。保护盖700保护绝缘固定件600以及位于容纳腔300内的极芯组400等部件。如图1及图15所示，保护盖700位于端板112的内侧，也即位于端板112的靠近极芯组400的一侧。
在一实施例中，保护盖700设有两个，两个保护盖700沿第二方向分布于箱本体100的两侧，一个保护盖700位于第三边框160的内侧，另一个位于第四边框170的内侧。
在进一步的实施例中，所述保护盖700沿所述第一方向的两侧设有朝向所述容纳腔300延伸的翻边部710(如图15和图17所示)，所述绝缘固定件600远离所述容纳腔300的一侧设有连接部630，所述连接部630沿所述第一方向设于所述第二导电件460的相对两侧，所述翻边部710与所述连接部630卡接配合以固定连接所述保护盖700与所述绝缘固定件600。
在进一步的实施例中，连接部630远离第二导电件460的一侧设有卡钩631，翻边部710上设有卡槽711，卡钩631卡接于卡槽711内，以使保护盖700与绝缘固定件600固定连接。在一些实施例中，连接部630上设有卡槽，翻边部710靠近容纳腔300的一侧设有卡钩，卡钩卡接于卡槽内，以使保护盖700与绝缘固定件600固定连接。
请参阅图18，在进一步的实施例中，容纳腔300内设有绝缘隔热件800。
在一实施例中，绝缘隔热件800为绝缘隔热板，绝缘隔热板与极芯组400厚度方向的表面贴合，极芯组400的厚度方向为第三方向，也就是说极芯组400沿厚度方向所对应的面积最大的表面与绝缘隔热板相贴合，进而可以提高绝缘隔热效果。
在另一实施例中，绝缘隔热件800为设置在容纳腔300的内壁上的绝缘隔热涂层。
请参阅图19，在进一步的实施例中，所述电池包10还包括用于引出电流的第一总电极410a和第二总电极420a，所述第一总电极410a和第二总电极420a位于所述箱体沿所述第二方向的同一侧。进一步地，第一总电极410a和第二总电极420a可从第三边框160或第四边框170引出。
具体地，极芯组400包括用于引出电流的第一电极引出部件410和第二电极引出部件420，第一电极引出部件410和第二电极引出部件420沿第二方向分布于极芯组400的相对两侧；容纳腔300内组成极芯串的多个极芯组400沿第二方向排列且串联连接；
多个容纳腔300沿第三方向排列，多个容纳腔300中沿第三方向排列的第一个容纳腔300中的第一个极芯组400的第一电极引出部件410和最后一个容纳腔300中的第一个极芯组400的第二电极引出部件420位于箱体的同一侧；其中第一电极引出部件410和第二电极引出部件420中的一个为第一总电极410a，另一个为第二总电极420a。并且，第一总电极410a和第二总电极420a的其中一个为正极、另一个为负极，这样电池包10整体的正负极电流的引出方向在同一侧，以便于与外部设备连接，例如与车辆的电子器件连接。
在另一些实施例中，多个容纳腔300中沿第三方向排列的第一个容纳腔300中的最后一个极芯组400的第二电极引出部件420和最后一个容纳腔300中的最后一个极芯组400的第一电极引出部件410位于箱体的同一侧。其中第一电极引出部件410和第二电极引出部件420中的一个为第一总电极410a，另一个为第二总电极420a。并且，第一总电极410a和第二总电极420a的其中一个为正极、另一个为负极，这样电池包10整体的正负极电流 的引出方向在同一侧，以便于与外部设备连接，例如与车辆的电子器件连接。
在进一步的实施例中，箱体上设有抽气孔190(如图2所示)。其中抽气孔190个数可以为一个，也可以为多个，可设置在顶板120或者底板130对应容纳腔300的位置上，或者设置在第三边框160和第四边框170上。
请参阅图20，在进一步的实施例中，箱体上设有多个抽气孔190，多个抽气孔190分别与多个容纳腔300对应连通。也就是说每个容纳腔300可通过对应的抽气孔190对其抽气。例如当容纳腔为14个时，所述抽气孔190也为14个。
在一些实施例中，多个容纳腔300相互连通，箱体上设有至少一个与容纳腔300连通的抽气孔。也就是说箱体上可以设置1个或者多个。例如，当抽气孔190为1个时，由于多个容纳腔300相互连通，因此只对该抽气孔190抽气时，可以将整个箱体内的容纳腔300都抽真空。在图21中示出了在最侧边的一个容纳腔300对应的顶板120设有一个抽气孔190。在其他实施例中，所述一个抽气孔190还可设置在箱体的其他位置。
当抽气孔为多个时，例如抽气孔为3个时，可将3个抽气孔190均匀的设置在箱体上，对3个抽气孔190同时抽气，可加快抽真空的速度。在其他实施例中，抽气孔的个数可根据实际需要来设置。
在进一步的实施例中，结构梁200上开设有通孔以使相邻两个容纳腔300相连通。或者，在一些实施例中，结构梁200沿第二方向的端部设有背离第三边框160或者第四边框170凹陷的凹部250(如图16所示)，相邻两个容纳腔300通过凹部250相连通。
请再次参阅图20，在一实施例中，箱本体100包括沿第一方向相对设置的顶板120和底板130，以及沿第三方向分布于顶板120两侧和底板130两侧的第一边框140和第二边框150；抽气孔190设置在顶板120和/或底板130上。在本实施例中，抽气孔190设置在顶板120上，且为了避免抽气孔190之间的距离较近而影响顶板120的结构强度，可将抽气孔190均匀的分布在顶板120上，在图20中的虚线为了清楚的显示每个容纳腔300的位置，每个容纳腔300对应的顶板120上对应设置一个抽气孔190。在其他实施例中，还可以在相间隔的容纳腔300对应的顶板120上设置一个抽气孔190，在剩余的相间隔的容纳腔300对应的底板130上设置一个抽气孔190。
请参阅图22，在一些实施例中，箱体还包括沿箱本体100第二方向分布于箱本体100两端的的第三边框160和第四边框170，箱本体100沿第二方向的两端设有第一开口180，第三边框160和第四边框170与箱本体100密封连接以封闭对应的第一开口180；第二方向与结构梁200的延伸方向平行；抽气孔190为一个，抽气孔190设置第三边框160或者第四边框170上。在本实施例中，抽气孔190设置第三边框160上。
本公开实施例还提供一种电动车1，如图23所示，包括车体20和上述的电池包，所述 电池包10通过安装部固定于车体20。本公开实施例提供的电动车1，当将这种电池包10安装到整车上时，该电池包10的结构强度可以作为整车结构强度的一部分，从而可提升整车的结构强度，有利于实现电动汽车整车。轻量化的设计要求，同时也降低整车的设计和制造成本。另外，本公开实施例的电池包的高度相对较低，这样不会过多占用车辆高度的空间。
以上所述实施例仅表达了本公开的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本公开专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以做出若干变形和改进，这些都属于本公开的保护范围。因此，本公开专利的保护范围应以所附权利要求为准。

Claims (44)

  1. 一种电池包，其特征在于，所述电池包包括密封的箱体以及位于所述箱体内的至少一个结构梁、多个相互电连接的极芯串；
    所述箱体包括箱本体，所述箱本体包括沿第一方向相对设置的顶板和底板，所述第一方向为所述箱体的高度方向，所述结构梁位于所述顶板与所述底板之间，至少一个所述结构梁将所述箱体内部分隔为多个容纳腔，至少一个所述结构梁连接于所述顶板和所述底板，至少一个所述容纳腔内设有至少一个所述极芯串；所述容纳腔的气压低于所述箱体外的气压；
    所述箱体上设有安装部，所述安装部用于与外部负载连接固定；
    所述极芯串包括多个沿第二方向依次排布且串联的极芯组；所述极芯组封装于封装膜内；所述极芯串的长度方向沿第二方向延伸；所述第二方向为所述箱体的宽度方向或者所述第二方向为所述箱体的长度方向。
  2. 如权利要求1所述的电池包，其特征在于，所述箱体上设有抽气孔。
  3. 如权利要求2所述的电池包，其特征在于，所述箱体上设有多个抽气孔，所述多个抽气孔分别与所述多个容纳腔对应连通。
  4. 如权利要求2所述的电池包，其特征在于，所述多个容纳腔相互连通，所述箱体上设有至少一个与所述容纳腔连通的抽气孔。
  5. 如权利要求4所述的电池包，其特征在于，所述结构梁上开设有通孔以使相邻两个容纳腔相连通。
  6. 如权利要求3或4所述的电池包，其特征在于，所述箱本体还包括沿第三方向分布于箱本体两侧的第一边框和第二边框；所述抽气孔设置在所述顶板和所述底板的至少一个上，所述第二方向为所述箱体的长度方向，所述第三方向为所述箱体的宽度方向；或者，所述第二方向为所述箱体的宽度方向，所述第三方向为所述箱体的长度方向。
  7. 如权利要求1所述的电池包，其特征在于，所述箱本体沿第二方向的端部设有第一开口；所述箱体还包括封闭所述第一开口的端板。
  8. 如权利要求7所述的电池包，其特征在于，所述箱本体沿第二方向的两端均设有第一开口；所述端板包括第三边框和第四边框，所述第三边框和所述第四边框与所述箱本体密封连接以封闭对应的所述第一开口；所述第三边框或者所述第四边框上设有抽气孔。
  9. 如权利要求7或8所述的电池包，其特征在于，所述箱本体沿第二方向的两端均设有第一开口；所述端板包括第三边框和第四边框，所述第三边框和所述第四边框与所述箱本体密封连接以封闭对应的所述第一开口；所述结构梁沿第二方向的端部设有背离所述第 三边框或者第四边框凹陷的凹部，相邻两个所述容纳腔通过所述凹部相连通。
  10. 如权利要求7所述的电池包，其特征在于，所述电池包还包括密封板，所述容纳腔沿第二方向的端部设有第二开口，所述密封板位于所述端板的内侧，所述密封板封堵所述第二开口邻近所述底板的一部分。
  11. 如权利要求7所述的电池包，其特征在于，所述电池包还包括密封板，所述容纳腔沿第二方向的端部设有第二开口，所述密封板位于所述端板的内侧，所述密封板完全封堵所述第二开口。
  12. 如权利要求8所述的电池包，其特征在于，所述箱本体、所述第三边框、所述第四边框为金属件，并通过焊接密封连接。
  13. 如权利要求1所述的电池包，其特征在于，所述容纳腔内的压力为-40KPa至-70KPa。
  14. 如权利要求1所述的电池包，其特征在于，所述箱本体与所述结构梁一体成型。
  15. 如权利要求1所述的电池包，其特征在于，所述结构梁为多个，多个所述结构梁沿第三方向间隔分布，所述结构梁的长度沿第二方向延伸，所述第二方向为所述箱体的宽度方向，所述第三方向为所述箱体的长度方向；或者，所述第二方向为所述箱体的长度方向，所述第三方向为所述箱体的宽度方向；所述容纳腔的长度大于500mm；所述极芯串的长度大于400mm。
  16. 如权利要求1所述的电池包，其特征在于，所述箱本体还包括沿第三方向分布于箱本体两侧的第一边框和第二边框；所述第二方向为所述箱体的长度方向，所述第三方向为所述箱体的宽度方向；或者，所述第二方向为所述箱体的宽度方向，所述第三方向为所述箱体的长度方向。
  17. 如权利要求16所述的电池包，其特征在于，所述第一边框和第二边框至少之一内部具有空腔，所述空腔内设有加强板，所述加强板将所述空腔分隔成多个子腔。
  18. 如权利要求16或17所述的电池包，其特征在于，所述第一边框和所述第二边框上设有所述安装部。
  19. 如权利要求1所述的电池包，其特征在于，所述极芯组包括用于引出电流的第一电极引出部件和第二电极引出部件，所述第一电极引出部件和所述第二电极引出部件沿第二方向分布于所述极芯组的相对两侧，相邻两个所述极芯组中的一个所述极芯组的所述第一电极引出部件与另一所述极芯组的所述第二电极引出部件电连接。
  20. 如权利要求1所述的电池包，其特征在于，同一个所述容纳腔内设有多个所述极芯串，多个所述极芯串沿所述极芯组的厚度方向依次排布且电连接，所述极芯组的厚度方向与第三方向平行，所述第二方向为所述箱体的长度方向，所述第三方向为所述箱体的宽 度方向；或者，所述第二方向为所述箱体的宽度方向，所述第三方向为所述箱体的长度方向。
  21. 如权利要求20所述的电池包，其特征在于，同一所述容纳腔内的多个所述极芯串串联连接；相邻两个所述极芯串中的一个所述极芯串的第一个所述极芯组与另一个所述极芯串的第一个所述极芯组电连接，相邻两个所述极芯串中的一个所述极芯串的第一个所述极芯组的所述第一电极引出部件与另一个所述极芯串的第一个所述极芯组的所述第二电极引出部件位于同一侧；
    或者，相邻两个所述极芯串中的一个所述极芯串的最后一个所述极芯组与另一个所述极芯串的最后一个所述极芯组电连接，相邻两个所述极芯串中的一个所述极芯串的最后一个所述极芯组的所述第二电极引出部件与另一个所述极芯串的最后一个所述极芯组的所述第一电极引出部件位于同一侧。
  22. 如权利要求20所述的电池包，其特征在于，同一所述容纳腔内的多个所述极芯串并联连接；
    相邻两个所述极芯串中的一个所述极芯串的第一个所述极芯组与另一所述极芯串的第一个所述极芯组电连接，且相邻两个所述极芯串中的一个所述极芯串的最后一个所述极芯组与另一所述极芯串的最后一个所述极芯组电连接；
    相邻两个所述极芯串中的一个所述极芯串的所述第一极芯组的所述第一电极引出部件与另一个所述极芯串的所述第一极芯组的所述第一电极引出部件位于同一侧，且相邻两个所述极芯串中的一个所述极芯串的最后一个所述极芯组的所述第二电极引出部件与另一个所述极芯串的最后一个所述极芯组的所述第二电极引出部件位于同一侧。
  23. 如权利要求20-22中任一项所述的电池包，其特征在于，相邻两个所述容纳腔内的所述极芯串串联连接；
    相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的第一个所述极芯组与另一个所述容纳腔内的其中一个所述极芯串的第一个所述极芯组电连接，相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的第一个所述极芯组的所述第一电极引出部件与另一个所述容纳腔内的其中一个所述极芯串的第一个所述极芯组的所述第二电极引出部件位于同一侧，或者，相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组与另一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组电连接，相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组的所述第一电极引出部件与另一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组的所述第二电极引出部件位于同一侧。
  24. 如权利要求20-22中任一项所述的电池包，其特征在于，相邻两个所述容纳腔内 的所述极芯串并联连接；
    相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的第一个所述极芯组与另一个所述容纳腔内的其中一个所述极芯串的第一个所述极芯组电连接，且相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组与另一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组电连接；
    相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的所述第一极芯组的所述第一电极引出部件与另一个所述容纳腔内的其中一个所述极芯串的所述第一极芯组的所述第一电极引出部件位于同一侧，且相邻两个所述容纳腔中的一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组的所述第二电极引出部件与另一个所述容纳腔内的其中一个所述极芯串的最后一个所述极芯组的所述第二电极引出部件位于同一侧。
  25. 如权利要求1所述的电池包，其特征在于，所述容纳腔内设有一个所述极芯串；相邻两个所述容纳腔内的所述极芯串串联连接或并联连接；
    当相邻两个所述容纳腔内的所述极芯串串联连接时，相邻两个所述容纳腔中的一个所述容纳腔内的所述极芯串的第一个所述极芯组与另一个所述容纳腔内的所述极芯串的第一个所述极芯组电连接，或者，相邻两个所述容纳腔中的一个所述容纳腔内的所述极芯串的最后一个所述极芯组与另一个所述容纳腔内的所述极芯串的最后一个所述极芯组电连接；
    当相邻两个所述容纳腔内的所述极芯组并联连接时，相邻两个所述容纳腔中的一个所述容纳腔内的所述极芯串的第一个所述极芯组与另一个所述容纳腔内的所述极芯串的第一个所述极芯组电连接，且相邻两个所述容纳腔中的一个所述容纳腔内的所述极芯串的最后一个所述极芯组与另一个所述容纳腔内的所述极芯串的最后一个所述极芯组电连接。
  26. 如权利要求1所述的电池包，其特征在于，所述极芯组包括极芯组主体和用于引出电流的第一电极引出部件及第二电极引出部件，所述第一电极引出部件和第二电极引出部件沿第二方向分布于所述极芯组主体的相对两侧，相邻两个所述极芯组中的其中一个极芯组的所述第一电极引出部件和另一个所述极芯组的所述第二电极引出部件之间通过所述第一导电件电连接；
    相邻两个所述极芯组的所述极芯组主体之间设有固定隔圈，所述第一导电件固定于所述固定隔圈内；相邻两个所述极芯组的所述极芯组主体与所述固定隔圈之间填充有结构胶；
    所述固定隔圈包括沿第三方向相对设置的第一隔圈和第二隔圈，所述第一导电件位于所述第一隔圈和所述第二隔圈之间，所述第一隔圈与所述第二隔圈连接以夹持固定所述第一导电件，所述第三方向与所述第一方向、所述第二方向不同。
  27. 如权利要求1所述的电池包，其特征在于，组成极芯串的所述多个极芯组封装于一个封装膜内；所述极芯组包括极芯组主体以及用于引出电流的第一电极引出部件和第二 电极引出部件，串联连接的两个所述极芯组中的其中一个所述极芯组的所述第一电极引出部件和另外一个所述极芯组的所述第二电极引出部件的连接处位于所述封装膜内；所述封装膜与所述第一电极引出部件和/或所述第二电极引出部件相对位置形成有封装部以将相邻两所述极芯组主体隔离。
  28. 如权利要求1所述的电池包，其特征在于，每个极芯组分别封装于一个封装膜内以形成极芯组件，所述极芯组件间串联。
  29. 如权利要求1所述的电池包，其特征在于，所述结构梁内设有散热通道；所述极芯组的长度沿所述第二方向延伸，所述极芯组的厚度沿所述第三方向延伸；所述极芯组沿所述第三方向的表面朝向所述结构梁，所述散热通道的延伸方向与所述第二方向相同，所述第二方向与所述第三方向不同。
  30. 如权利要求29所述的电池包，其特征在于，所述结构梁包括沿所述第二方向间隔设置的第一侧板和第二侧板，所述第一侧板、所述第二侧板、所述顶板以及所述底板共同围成所述散热通道。
  31. 如权利要求30所述的电池包，其特征在于，所述结构梁还包括与所述第一侧板及所述第二侧板连接的隔板，所述隔板将所述散热通道分隔成多个子通道。
  32. 如权利要求1所述的电池包，其特征在于，所述箱体上设有连通所述容纳腔的注胶孔，每个所述容纳腔至少对应一个注胶孔，所述注胶孔用于向对应的所述容纳腔内填充胶，以将所述极芯组以及箱体固定连接。
  33. 如权利要求32所述的电池包，其特征在于，组成所述极芯串的相邻两个所述极芯组通过第一导电件电连接，所述注胶孔与所述第一导电件对应设置。
  34. 如权利要求1所述的电池包，其特征在于，所述电池包还包括采样组件，所述采样组件用于采集所述极芯组的信息。
  35. 如权利要求1所述的电池包，其特征在于，所述容纳腔沿第二方向的端部设有第二开口，相邻两个所述容纳腔内的位于同一侧且邻近所述第二开口处的两所述极芯组通过第二导电件电连接；所述第二开口处设有绝缘固定件，所述第二导电件固定于所述绝缘固定件上。
  36. 如权利要求35所述的电池包，其特征在于，所述第二导电件设于所述绝缘固定件远离所述极芯组的一侧，所述极芯组包括用于引出电流的第一电极引出部件和第二电极引出部件，所述第一电极引出部件和所述第二电极引出部件沿第二方向分布于所述极芯组的相对两侧，相邻两个所述容纳腔内的位于同一侧且邻近所述第二开口处的两所述极芯组中一个极芯组的所述第一电极引出部件与另一所述极芯组的所述第一电极引出部件贯穿所述绝缘固定件并通过所述第二导电件电连接；或者，
    相邻两个所述容纳腔内的位于同一侧且邻近所述第二开口处的两所述极芯组中一个所述极芯组的所述第二电极引出部件与另一所述极芯组的所述第二电极引出部件贯穿所述绝缘固定件并通过所述第二导电件电连接；或者，
    相邻两个所述容纳腔内的位于同一侧且邻近所述第二开口处的两所述极芯组中一个所述极芯组的所述第一电极引出部件与另一极芯组的所述第二电极引出部件贯穿所述绝缘固定件并通过所述第二导电件电连接。
  37. 如权利要求36所述的电池包，其特征在于，所述绝缘固定件沿所述第一方向的两侧设有卡接部，所述绝缘固定件通过所述卡接部与所述结构梁卡合固定。
  38. 如权利要求37所述的电池包，其特征在于，所述结构梁的端部设有沿所述第一方向相对设置的延伸部，所述结构梁与所述延伸部围成凹部，所述绝缘固定件通过所述卡接部与所述延伸部卡合以固定在所述凹部中。
  39. 如权利要求38所述的电池包，其特征在于，所述延伸部内设有凹槽，所述卡接部为卡块；或者，所述卡接部上设有凹槽，所述延伸部为卡块，所述卡块卡接于所述凹槽内。
  40. 如权利要求35-39中任一项所述的电池包，其特征在于，所述电池包还包括保护盖，所述保护盖设置于所述绝缘固定件远离所述极芯组的一侧。
  41. 如权利要求40所述的电池包，其特征在于，所述保护盖沿所述第一方向的两侧设有朝向所述容纳腔延伸的翻边部，所述绝缘固定件远离所述容纳腔的一侧设有连接部，所述连接部沿所述第一方向分布于所述第二导电件的相对两侧，所述翻边部与所述连接部卡接配合以固定连接所述保护盖与所述绝缘固定件。
  42. 如权利要求41所述的电池包，其特征在于，所述连接部远离所述第二导电件的一侧设有卡钩，所述翻边部上设有卡槽；或者，所述连接部上设有卡槽，所述翻边部靠近所述容纳腔的一侧设有卡钩；所述卡钩卡接于所述卡槽内。
  43. 如权利要求1所述的电池包，其特征在于，所述电池包还包括用于引出电流的第一总电极和第二总电极，所述第一总电极和第二总电极位于所述箱体沿所述第二方向的同一侧；
    所述箱本体还包括沿第三方向分布于箱本体两侧的第一边框和第二边框；
    所述结构梁设有多个，多个所述结构梁沿第三方向间隔分布，所述结构梁的长度沿第二方向延伸，多个所述结构梁连接于所述顶板和所述底板；所述箱本体与所述结构梁一体成型；
    所述箱本体沿所述第二方向的两端均设有第一开口，所述箱体还包括第三边框和第四边框，所述第三边框和所述第四边框与所述箱本体密封连接以封闭对应的所述第一开口。
  44. 一种电动车，其特征在于，所述电动车包括车体和如权利要求1-43任一项所述的 电池包，所述电池包通过所述安装部固定于所述车体。
PCT/CN2020/124746 2020-04-24 2020-10-29 电池包及电动车 WO2021212794A1 (zh)

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