CN219534587U - Battery pack and vehicle - Google Patents

Battery pack and vehicle Download PDF

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Publication number
CN219534587U
CN219534587U CN202320458287.7U CN202320458287U CN219534587U CN 219534587 U CN219534587 U CN 219534587U CN 202320458287 U CN202320458287 U CN 202320458287U CN 219534587 U CN219534587 U CN 219534587U
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CN
China
Prior art keywords
flat plate
battery pack
adjacent
accommodating space
plate portion
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN202320458287.7U
Other languages
Chinese (zh)
Inventor
席兵荣
何兵权
常红磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xinwangda Power Technology Co ltd
Original Assignee
Sunwoda Electric Vehicle Battery Co Ltd
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 Sunwoda Electric Vehicle Battery Co Ltd filed Critical Sunwoda Electric Vehicle Battery Co Ltd
Priority to CN202320458287.7U priority Critical patent/CN219534587U/en
Application granted granted Critical
Publication of CN219534587U publication Critical patent/CN219534587U/en
Priority to PCT/CN2023/122485 priority patent/WO2024178977A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B60L58/27—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 heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The utility model relates to the technical field of batteries and discloses a battery pack and a vehicle, wherein the battery pack comprises a box body, single batteries and a plurality of heat management components, the heat management components are arranged in the box body at intervals along a first direction, the heat management components comprise a plurality of first flat plate parts, a plurality of second flat plate parts and a plurality of connecting parts, the first flat plate parts and the second flat plate parts are alternately arranged along a second direction and are connected through the connecting parts, a space is reserved between the side walls of the same side of the adjacent first flat plate parts and second flat plate parts in the first direction, the adjacent two heat management components define a first accommodating space and a second accommodating space which are communicated with each other, and the single batteries are arranged in the first accommodating space and the second accommodating space; based on the interval, the same side of the single batteries in the first accommodating space and the second accommodating space in the second direction is also provided with a distance, so that the dead area between the single batteries is reduced, the thermal resistance between the single batteries can be reduced, and the safety of the battery pack is improved.

Description

Battery pack and vehicle
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery pack and a vehicle.
Background
The battery pack is generally formed by combining a plurality of single batteries. In practical application, a thermal management component for performing thermal management on the single battery is arranged in the battery pack so as to ensure the service performance of the battery pack.
In the prior art, most of the battery packs adopt the heat management components with the straight plate type structures to clamp the two sides of the single batteries, so that adjacent single batteries are completely right opposite, when one of the single batteries is in thermal runaway, heat quickly spreads to the rest single batteries, and the thermal safety of the battery packs is poor.
Disclosure of Invention
The purpose of the utility model is that: the thermal safety of the battery pack is improved.
In order to achieve the above object, the present utility model provides a battery pack comprising:
the box body is provided with a first direction and a second direction which are intersected;
the single batteries are arranged in the box body;
a plurality of thermal management components disposed within the tank at intervals along a first direction, the thermal management components comprising: a plurality of first flat plate parts, a plurality of second flat plate parts and a plurality of connecting parts, wherein at least part of the first flat plate parts and the second flat plate parts are alternately arranged along a second direction, the adjacent first flat plate parts and the adjacent second flat plate parts have a space between the side walls on the same side in the first direction, and the connecting parts are arranged between the first flat plate parts and the second flat plate parts;
at least two adjacent first flat plate parts of the heat management component are oppositely arranged along a first direction and define a first accommodating space, at least two adjacent second flat plate parts of the heat management component are oppositely arranged along the first direction and define a second accommodating space, the first accommodating space is communicated with the second accommodating space, and at least one single battery is arranged in each of the first accommodating space and the second accommodating space.
Optionally, the unit cell is disposed between two adjacent connection parts of the thermal management component, the unit cell has a third side wall and a fourth side wall that are disposed opposite to each other along the second direction, and a projection of the connection part on a plane where the third side wall is located at least partially covers the third side wall along the second direction; and/or the projection of the connecting part on the plane of the fourth side wall at least partially covers the fourth side wall.
Optionally, along the first direction, a first distance D is provided between the first plate portion and the second plate portion 1 mm, a second distance D is provided between the first plate part and the second plate part adjacent along the second direction 2 mm, satisfy: d is more than or equal to 0.01 1 /D 2 ≤100。
Optionally, the first distance D 1 The method meets the following conditions: d is more than or equal to 0.3 1 Less than or equal to 50, and/or the second distance D 2 The method meets the following conditions: d is more than or equal to 0.3 2 ≤50。
In a specific embodiment of the present utility model, each of the first flat plate portion, the second flat plate portion and the connection portion is at least partially covered with an insulating layer.
Optionally, the size of the single battery along the first direction is H 1 mm, satisfy: h is more than 0.03 and less than 2 /H 1 ＜0.8。
Optionally, the spacing between the first side and the second side on the same side of the thermal management component in the first direction is H 2 mm satisfies: 50. not less than H 2 ≥2.5。
Optionally, at least part of the single cells are opposite to each other in the second direction, and the facing area of two adjacent single cells is S 1 mm 2 The area of one side of the single battery along the second direction is S 2 mm 2 The method comprises the following steps: s is more than 0.2 and less than 1 /S 2 ＜1。
Optionally, along the first direction, a third accommodating space is defined between two adjacent connecting parts, and at least one of a heat insulating piece, an insulating piece and a buffer piece is arranged in the third accommodating space.
Optionally, the unit cell includes a first side wall and a second side wall that are disposed opposite to each other along a first direction, where the surface areas of the first side wall and the second side wall are equal and are the side walls with the largest surface areas of the unit cell, and the first side wall and the second side wall are respectively in contact with adjacent first flat plate portions, or the first side wall and the second side wall are respectively in contact with adjacent second flat plate portions.
Optionally, the first plate portion, the second plate portion and the connecting portion are of a unitary structure.
Optionally, a medium flow channel is disposed in the thermal management component, and the medium flow channel penetrates through the first flat plate portion, the second flat plate portion and the connection portion along the extending direction of the thermal management component.
Optionally, the first plate portion and the second plate portion are disposed in parallel.
The utility model also provides a vehicle comprising the battery pack.
Compared with the prior art, the battery pack and the vehicle have the beneficial effects that:
according to the battery pack, the first flat plate part and the second flat plate part of the thermal management component are provided with the first distance in the first direction, so that the first accommodating space limited by the first flat plate part and the second accommodating space limited by the second flat plate part are staggered in the second direction, and the single batteries arranged in the first accommodating space and the single batteries arranged in the second accommodating space are staggered in the second direction, so that the area of the part, covered by the adjacent side surfaces of two adjacent single batteries, of each other is smaller than that of the side surface of a single battery, namely, the opposite area of the adjacent single battery is reduced, the thermal resistance between the single batteries can be increased, and the safety of the battery pack is improved.
Drawings
FIG. 1 is a block diagram of a plurality of thermal management components in accordance with an embodiment of the present utility model mated with a plurality of cells;
FIG. 2 is a first angular block diagram of a thermal management component of an embodiment of the present utility model;
FIG. 3 is a block diagram of the location of two adjacent thermal management components of an embodiment of the present utility model;
FIG. 4 is a block diagram of two adjacent thermal management components mated with a single cell in accordance with an embodiment of the present utility model;
fig. 5 is a schematic view showing the positions of two adjacent single batteries when viewed from the second direction according to an embodiment of the present utility model;
fig. 6 is a schematic view of a single cell when viewed from a second direction according to an embodiment of the present utility model;
FIG. 7 is a second angular schematic view of a thermal management component of an embodiment of the present utility model;
FIG. 8 is a third angular structural schematic of a thermal management component of an embodiment of the present utility model.
In the figure, 10, a single battery; 20. a thermal management component; 21. a first flat plate portion; 211. a first side; 22. a second flat plate portion; 221. a second side; 23. a connection part; 24. a media flow path; x, a first direction; y, second direction.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "plurality" means two or more, unless specifically defined otherwise.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
In the examples of the present application, "parallel" refers to a state in which the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is-1 ° to 1 °. The term "perpendicular" refers to a state in which the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89 ° to 91 °. Equal distance, equal angle or equal area refers to a state where the tolerance range is-1%.
The utility model provides a vehicle, which is provided with a battery pack for providing power for electric equipment on the vehicle.
As shown in fig. 1 to 8, a battery pack according to a preferred embodiment of the present utility model includes a case, a unit cell 10, and a thermal management member 20. Referring to fig. 1, 2 and 3, the case (not shown) has a first direction X and a second direction Y intersecting each other, and preferably, the first direction X is perpendicular to the second direction Y, and the unit cells 10 and the thermal management members 20 are all plural and provided in the case. Wherein the plurality of heat management components 20 are arranged in the box body at intervals along the first direction X, the heat management components 20 comprise a plurality of first flat plate parts 21, a plurality of second flat plate parts 22 and a plurality of connecting parts 23, at least part of the first flat plate parts 21 and the second flat plate parts 22 are alternately arranged along the second direction Y, and a space H is reserved between the side walls of the same side of the adjacent first flat plate parts 21 and second flat plate parts 22 along the first direction X 2 mm, where H 2 > 0, the adjacent first flat plate portion 21 and second flat plate portion 22 are connected by a connecting portion 23.
The first flat plate portions 21 of at least part of two adjacent thermal management components 20 are disposed opposite to each other along the first direction X and define a first accommodating space. The second flat plate portions 22 of at least part of two adjacent thermal management components 20 are disposed opposite to each other along the first direction X and define a second accommodating space, and the connecting portions 23 of at least part of two adjacent thermal management components 20 are disposed opposite to each other along the first direction X and define a third accommodating space. The first accommodating space is communicated with the second accommodating space through the third accommodating space, and at least one single battery 10 is arranged in each of the first accommodating space and the second accommodating space.
Based on the above-described structure, in the battery pack of the present embodiment, since the first flat plate portion 21 and the second flat plate portion 22 have a pitch in the first direction X, the same side of the first accommodating space and the second accommodating space in the second direction Y will also have a certain distance, so that the unit cells 10 in the first accommodating space and the unit cells 10 in the second accommodating space are offset from each other, at this time, the area of the overlapping portion of the two projected on the plane perpendicular to the second direction Y is smaller than the side area of one side of the single unit cell 10 in the second direction Y, and the thermal resistance between the adjacent two unit cells 10 in the battery pack 1 becomes smaller; in addition, a third accommodating space is reserved between two adjacent single batteries 10, so that a certain distance is reserved between the two adjacent single batteries 10, namely, the creepage distance and the heat transfer distance between the two adjacent single batteries 10 are increased, and an insulating and heat-insulating material can be filled in the third accommodating space to further improve the insulating and heat-insulating performance between the two adjacent single batteries 10, and the area of the projection overlapping part of the two adjacent single batteries 10 is smaller than the side area of the single batteries 10, so that the insulating and heat-insulating material is filled in the position corresponding to the overlapping part of the two adjacent single batteries 10, thereby reducing the use of the insulating and heat-insulating material, reducing the cost of a battery pack, and simultaneously ensuring the insulating safety and the thermal safety of the battery pack.
In the present embodiment, the first flat plate portion 21 and the second flat plate portion 22 are parallel, that is, the distances between the side walls on the same side of the first flat plate portion 21 and the second flat plate portion 22 are approximately equal.
In the present embodiment, the first flat plate portion 21, the connection portion 23, and the second flat plate portion 22 have substantially equal thicknesses in the first direction X, and are sequentially connected to form a substantially broken line structure, that is, the thermal management component 20 is formed with a groove structure on both sides in the first direction X. At this time, the thermal management component 20 may be formed by welding a plurality of plates, or by bending one plate, or by re-punching an extrusion.
In other embodiments, the thicknesses of the first flat plate portion 21, the connection portion 23, and the second flat plate portion 22 along the first direction X are different, and are sequentially connected, and the thermal management member 20 is formed with a groove structure only on one side along the first direction X. At this time, the thermal management component 20 may be stamped from a sheet of material.
In some embodiments, along the first direction X, a third accommodating space is defined between two adjacent connecting portions 23, and a filler is disposed in the third accommodating space, where the filler includes at least one of a heat insulating member, an insulating member, and a buffer member; so as to fully utilize the third accommodation space, thus also increasing the heat insulation performance or the insulation performance between the adjacent single batteries 10 and improving the safety. Specifically, the insulating member made of the insulating and heat-insulating material can realize insulation and heat-insulation between two adjacent unit cells 10, so that short circuit or heat spreading between two unit cells 10 is avoided, or the insulating member made of the insulating material is placed between two adjacent unit cells 10, further preventing heat spreading, or the buffer member made of the elastic material can increase limit between two unit cells 10, and provide a certain buffer space, or simultaneously provide an insulating member and an insulating member to realize insulation and heat-insulation between two adjacent unit cells 10, which is not limited in this embodiment. Wherein the heat insulating material is plastic, aerogel, etc. Insulating materials such as insulating foam, rubber, ceramic silicone rubber, and the like.
In some embodiments, the first accommodating space and the second accommodating space are both provided with one single battery 10, and at least one of an insulating member, a heat insulating member, and a buffer member is disposed between two adjacent single batteries 10.
In other embodiments, the first accommodating space and the second accommodating space may be provided with different numbers of single batteries 10, or two single batteries 10 or a plurality of single batteries 10 are provided, at this time, the single battery 10 in the first accommodating space close to the second accommodating space is the first single battery 10, the single battery 10 in the second accommodating space close to the first accommodating space is the second single battery 10, at least one of an insulating member, a heat insulating member and a buffer member is provided between the adjacent first single battery 10 and the adjacent second single battery 10, in addition, at least one of an insulating member, a heat insulating member and a buffer member may be provided between the adjacent two single batteries 10 in the first accommodating space, and at least one of an insulating member, a heat insulating member and a buffer member is provided between the adjacent two single batteries 10 in the second accommodating space.
In some embodiments, referring to fig. 1 and 3, taking a single first accommodating space and a single second accommodating space as an example where a single battery cell 10 is disposed between two adjacent connecting portions 23 of the thermal management component 20, projections of the single battery cell 10 and the connecting portions 23 along the second direction Y at least partially overlap, and more preferably, in this embodiment, two ends of the single battery cell 10 along the second direction Y are respectively contacted with the two adjacent connecting portions 23, specifically, the first accommodating space is defined by two first flat plate portions 21 disposed opposite to each other along the first direction X and two adjacent connecting portions 23 of one of the thermal management components 20, and the second accommodating space is defined by two second flat plate portions 22 disposed opposite to each other along the first direction X and two adjacent connecting portions 23 of the other thermal management component 20, and therefore, the two adjacent connecting portions 23 of the thermal management component 20 can limit the single battery cell 10, so that the single battery cell 10 is limited by the first direction X and the second direction Y at the same time, and stability of the single battery cell 10 in the package can be improved.
When the first accommodating space is provided with at least two single batteries 10, along the second direction Y, the first single battery 10 in the first accommodating space contacts one of the two connection parts 23 adjacent to the thermal management component 20, and the last single battery 10 contacts the other connection part 23, based on which the arrangement stability of all the single batteries 10 in the first accommodating space can be ensured. Similarly, when the second accommodating space is provided with at least two unit batteries 10, the two adjacent connecting portions 23 of the thermal management component 20 limit all the unit batteries 10 in the above manner.
In some embodiments, referring to fig. 3, there is a first distance D between the first plate portion 21 and the second plate portion 22 along the first direction X 1 mm, a second distance D is provided between the first plate portion 21 and the second plate portion 22 adjacent in the second direction Y 2 mm, satisfy: d is more than or equal to 0.01 1 /D 2 Less than or equal to 100, e.g., D 1 /D 2 May be in the range of one or any two of 0.08, 1.5, 2.4, 3.2, 4.5, 5.8, 7.3, 8.2, 9.6, 15, 25, 47, 58, 77, 84, 92. Wherein D is 1 /D 2 Satisfying the relation can enable the first flat plate portion 21 and the second flat plate portion 22 of the thermal management component 20 to have proper distances in the first direction X and the second direction Y, and corresponding avoidance positions are formed on two sides of the thermal management component 20 along the first direction X, so that the specifications of the first accommodating space and the second accommodating space are the same when the thermal management components 20 are arranged along the first direction X, and single batteries 10 with the same specification can be placed, thereby reducing the manufacturing cost of the battery pack 1. When D is 1 /D 2 The distance between the first accommodating space and the second accommodating space is reduced, the structure of the battery pack 1 is more compact, but at this time, the limiting effect of the first accommodating space or the second accommodating space on the single battery 10 is reduced, the connection reliability of the single battery 10 is reduced, and when D 1 /D 2 The limiting effect of the first accommodating space or the second accommodating space on the single battery 10 can be increased, the connection reliability of the single battery 10 is improved, the distance between the first accommodating space and the second accommodating space is increased, the structure of the battery pack 1 can be loose, and the space utilization rate is reduced, so that the connection reliability and the structural compactness of the battery pack 1 can be both considered when the range is satisfied.
In other preferred embodiments, 1.9.ltoreq.D 1 /D 2 88 or less, more preferably 24 or less D 1 /D 2 And less than or equal to 57 to better control the manufacturing cost of the battery pack.
Further, a first distance D 1 The method meets the following conditions: d is more than or equal to 0.3 1 Less than or equal to 50, e.g., D 1 May be in the range of one or any two of 0.35, 0.5, 0.54, 0.98, 1.6, 4.4, 6.2, 8.5, 14.4, 16.8, 25.6, 28.3, 32.4, 40.8, 43, 48.6. Based on this, the first flat plate portion 21 and the second flat plate portion 22 of the thermal management member 20 are made to have an appropriate distance therebetween to give consideration to the manufacturing cost and the safety of the battery pack 1.
In other preferred embodiments, the first distance D 1 The method meets the following conditions: d is not less than 3 1 Less than or equal to 35, more preferably, the first distance D 1 The method meets the following conditions: d is 11-11 1 21, so that the distance between the first plate portion 21 and the second plate portion 22 is more appropriate.
In some embodiments, the second distance D 2 The method meets the following conditions: d is more than or equal to 0.3 2 ≤50，D 2 The range may be one or any two of 0.5, 2.6, 5.6, 8.8, 14.6, 18, 22, 25, 30, 34, 39, 45, so that the distance between the first plate portion 21 and the second plate portion 22 is appropriate, the amount of heat resistance and insulating material between adjacent unit cells 10 is controlled to be in an appropriate range and the maintenance of the battery pack 1 is facilitated, and the weight of the heat management member 20 is prevented from being excessively large, resulting in a decrease in the weight energy density of the battery pack 1.
In some embodiments, 0.3.ltoreq.D 1 50 is less than or equal to 0.3 is less than or equal to D 2 ≤50。
Specifically, a first distance D 1 The measurement method of (2) is as follows: the side surface of the first flat plate part 21, which is close to the second flat plate part 22, is taken as a first measuring surface, the side surface of the second flat plate part 22, which is close to the first flat plate part 21, is taken as a second measuring surface, the distances between the first measuring surface and the second measuring surface are measured for a plurality of times to obtain a plurality of first measuring values, and the average value of the plurality of first measuring values is calculated to be the first distance D 1 。
Second distance D 2 The measurement method of (2) is as follows: taking the first side 211 and the second side 221 of the thermal management component 20 on the same side in the first direction X as measurement references, firstly acquiring a first edge line with abrupt curvature at one side of the first side 211 near the second side 221, that is, a bending line at which bending occurs, and then acquiring a second edge line near the first side 221A second edge line with abrupt curvature at one side of the side surface 211, i.e. a bending line at which bending occurs, measuring the distances between the first edge line and the second edge line in the second direction Y for multiple times to obtain multiple second measurement values, and calculating an average value of the multiple second measurement values to obtain a second distance D 2 。
In some embodiments, referring to fig. 3 and 4, the cell 10 has a dimension H in the first direction X 1 mm; the first flat plate portion 21 includes two first side surfaces 211 disposed opposite to each other in the first direction X, the second flat plate portion 22 includes two second side surfaces 221 disposed opposite to each other in the first direction X, and a space between the first side surfaces 211 and the second side surfaces 221 on the same side of the first direction X of the thermal management component 20 is H 2 mm, satisfy: 0.03<H 2 /H 1 <0.8, e.g. H 2 /H 1 May be in the range of one or any two of 0.035, 0.06, 0.15, 0.18, 0.24, 0.27, 0.36, 0.38, 0.43, 0.50, 0.56, 0.63, 0.78. Wherein H is 1 、H 2 Satisfying the relation can make the connecting portion 23 have a proper length in the first direction X, so as to firmly limit the single battery 10, avoid the single battery 10 from sliding relatively with the connecting portion 23 when receiving the acting force along the second direction Y, and avoid the extrusion between the adjacent single batteries 10, and the connecting portion 23 with a proper length can control the facing area between the two single batteries 10 adjacent to the connecting portion 23, so as to control the consumption of the insulating and heat-insulating material, and in addition, because of H 2 The dimensional influence of the thermal management member 20 in the first direction X, control H 2 And H is 1 The problem of excessive overall weight of the thermal management member 20 due to the excessively long length of the connection portion 23 can be avoided, and thus, the manufacturing cost and the weight energy density of the battery pack are not affected.
In other preferred embodiments, the battery pack satisfies: 0.1<H 2 /H 1 <0.55, more preferably, satisfies: 0.2<H 2 /H 1 <0.4, along the first direction X, the length of the connection portion 23 is more reasonable along with the dimensional change of the single battery 10, and connection reliability and cost control of the single battery 10 can be considered.
Specifically, the unit cell 10 in the present embodiment is square, so its dimension along the first direction X is H 1 In the present embodiment, the dimension of the single battery 10 along the first direction X is the distance between the two opposite side walls along the first direction X, and the distance can be obtained by a conventional test method, that is, the two opposite side walls along the first direction X of the single battery 10 can be clamped by a vernier caliper, a plurality of third measurement values are obtained by measurement, and an average value of the plurality of third measurement values is calculated to obtain H 1 。
In the present embodiment, opposite side walls of the unit cell 10 in the first direction X are respectively in contact with the adjacent thermal management members 20.
And the distance H 2 The measurement method of (2) is as follows: taking the first side 211 and the second side 221 of the thermal management component 20 along the same side of the first direction X as measurement surfaces, measuring the distance between the first side 211 and the second side 221 as measurement surfaces for multiple times to obtain multiple fourth measurement values, and calculating the average value of the multiple fourth measurement values to obtain a distance H 2 。
Further, a distance H between the first side 211 and the second side 221 on the same side of the thermal management component 20 along the first direction X 2 The method meets the following conditions: 50. not less than H 2 Gtoreq 2.5, e.g. H 2 May be one of 3.4, 5.6, 10.8, 17, 23.2, 31.6, 35.6, 42, 47.9. Wherein H is 2 This relationship is satisfied to accommodate the size setting of the unit cell 10.
In other embodiments, 33. Gtoreq.H 2 More preferably 24.gtoreq.H 2 11 or more to better accommodate the size of the cell 10.
In some embodiments, referring to fig. 5, fig. 5 is a schematic diagram of the positions of two adjacent single cells 10 when viewed from the second direction Y, and at least a part of the single cells 10 have the facing areas S of the two adjacent single cells 10 along the second direction Y 1 mm 2 As shown in fig. 5, the facing area S1 is a portion shown by a broken line frame; referring to fig. 6, fig. 6 is a schematic view of the unit cell 10 as seen from the second direction Y, and a side area of one side of the unit cell 10 along the second direction YIs S 2 mm 2 The method comprises the following steps: s is more than 0.2 and less than 1 /S 2 < 1. Specifically, taking a single first accommodating space and a single second accommodating space each provided with one single battery cell 10 as an example for explanation, two adjacent battery cells 10 along the second direction Y have a facing area S 1 mm 2 Which refers to the facing area between the unit cells 10 of the first accommodation space and the unit cells 10 of the second accommodation space, wherein S 1 /S 2 May be in the range of one or any two of 0.31, 0.48, 0.53, 0.58, 0.64, 0.66, 0.72, 0.78, 0.82, 0.92, 0.99, 0.995. S is S 1 、S 2 Satisfying the relation can provide a suitable facing area between the two unit cells 10 when the facing area S 1 When the duty ratio of the battery pack is reduced, the consumption of the insulating and heat-insulating material is reduced, the manufacturing cost of the battery pack 1 is reduced, at the moment, the thermal resistance between the adjacent single batteries 10 is increased, the thermal diffusion risk of the battery pack is reduced, the thermal safety performance of the battery pack is ensured, but at the moment, the space between the adjacent single batteries 10 is reduced, the breakthrough space reserved for the disassembling tool is smaller, the detachability of the battery pack 1 is reduced, and the subsequent maintenance convenience is reduced; when facing area S 1 When the duty ratio is increased, the space between the adjacent unit cells 10 is increased at this time, the detachability of the battery pack 1 is increased, so that the subsequent maintenance convenience is increased, that is, the maintenance cost is reduced, but at this time, the amount of the insulating and heat-insulating material is increased, the manufacturing cost is increased, the thermal resistance between the adjacent unit cells 10 is reduced, the thermal diffusion risk of the battery pack 1 is increased, and the thermal safety of the battery pack 1 is reduced; when the facing area ratio is in the above range, the thermal safety, the manufacturing cost, and the maintenance convenience of the battery pack can be well considered. Specifically, the facing area refers to a partial area of one of the adjacent two unit cells 10, which is covered by a projection of the other unit cell 10 onto the other unit cell 10.
In other preferred embodiments, 0.45.ltoreq.S 1 /S 2 And less than or equal to 0.65 so that a more proper facing area is provided between the adjacent two unit batteries 10.
In some embodiments, 20 < S 1 < 10000, preferably 600 < S 1 ＜6000；100＜S 2 < 10000, preferably 800 < S 2 ＜6000。
Specifically, the unit cell 10 is square in the present embodiment, so the projected area of the unit cell 10 along the second direction Y is S 2 mm 2 The method can be obtained by a conventional measuring method, namely measuring the side length of the square for a plurality of times, calculating a plurality of area measuring values, and then obtaining the average value of the plurality of area measuring values to obtain S 2 Is a value of (2).
While the facing area of two adjacent single batteries 10 along the second direction Y is S 1 mm 2 The measuring method comprises the following steps: drawing boundary lines on adjacent side walls of two adjacent single batteries 10 by a right-angle tool, forming a closed graph, measuring the side length of the closed graph by a length measuring tool such as a ruler, calculating the side length to obtain an area measurement value, repeating for multiple times to obtain a plurality of area measurement values, and averaging the area measurement values to obtain S 2 。
In some embodiments, the first plate portion 21, the second plate portion 22, and the connection portion 23 are at least partially covered with an insulating layer to achieve insulation between the unit cells 10 and the thermal management part 20, wherein the insulating layer may be formed by pasting an insulating film or spraying insulating powder.
In some embodiments, the battery cell 10 includes a first sidewall and a second sidewall disposed opposite to each other along the first direction X, preferably, the first sidewall and the second sidewall have equal surface areas, and the first sidewall and the second sidewall are sidewalls with the largest surface area of the battery cell 10. The first side wall of the unit cell 10 contacts with the adjacent thermal management component 20, that is, the first side wall contacts with the first flat plate portion 21 or the second flat plate portion 22, and since the first side wall and the second side wall are both the side walls with the largest surface area of the unit cell 10, the bonding area of the unit cell 10 and the thermal management component 20 is also the largest, and based on this, the thermal management efficiency of the unit cell 10 can be improved. The first side wall may be in direct contact with the first flat plate portion 21 or the second flat plate portion 22, or may be in contact with the first flat plate portion through an intermediate medium, and in practical application, at least one of an insulating layer or an adhesive layer may be further disposed between the first side wall of the unit cell 10 and the thermal management component 20, and at least one of an insulating layer or an adhesive layer may be further disposed between the second side wall of the unit cell 10 and the thermal management component 20.
Specifically, the unit cell 10 further includes a third sidewall and a fourth sidewall disposed opposite to each other along the second direction Y, wherein the third sidewall and the fourth sidewall are perpendicular to the first sidewall and the second sidewall, and the surface areas of the third sidewall and the fourth sidewall are equal to and smaller than the surface areas of the first sidewall and the second sidewall. In other embodiments, two adjacent thermal management components 20 are in contact with the third and fourth sidewalls of the battery cell 10, respectively, which may also enable thermal management of the battery cell 10.
In some embodiments, the first plate portion 21, the second plate portion 22 and the connecting portion 23 are formed as a single piece, such as a single piece made by injection molding, a single piece formed by stamping and bending a profile, or a welded structure by stamping.
In some embodiments, referring to fig. 7, the connection portion 23 is a flat plate structure, and the angle between the connection portion 23 and the first flat plate portion 21 is α, which satisfies: alpha is more than or equal to 75 degrees and less than or equal to 179 degrees; for example, α is a range of one or any two of 80 °, 90 °, 96 °, 112 °, 120 °, 138 °, 145 °, 164 °, and satisfying the relational expression may allow a proper angle between the connection portion 23 and the first flat plate portion 21 to ensure that the first flat plate portion 21 and the second flat plate portion 22 have a proper pitch in the second direction Y.
In some embodiments, the connection 23 transitions to the first plate portion 21 and the second plate portion 22 by a rounded structure. The connecting portion 23 of the flat plate structure includes two first planes disposed opposite to each other, where the single first plane and the single first side 211 are located on the same side of the thermal management component 20, and the included angle between the two first planes is the included angle α, which can be measured by a conventional measurement method, which is not described in detail in this embodiment.
In other embodiments, the connecting portion 23 may also be an arc-shaped plate structure or other plate structures, which is not limited in this embodiment.
In some embodiments, referring to fig. 8, a medium flow passage 24 is provided in the thermal management component 20, and the medium flow passage 24 penetrates the first flat plate portion 21, the connection portion 23, and the second flat plate portion 22 in the extending direction of the thermal management component 20, specifically, the medium flow passage 24 penetrates the first flat plate portion 21, the connection portion 23, and the second flat plate portion 22 in order in the connecting direction of the first flat plate portion 21, the connection portion 23, and the second flat plate portion 22. As one specific implementation manner of the medium flow passage 24, the thermal management component 20 has a tubular structure with equal wall thickness, and the formed pipeline is the medium flow passage 24, so that the thermal management component 20 with the structure has large space of the medium flow passage 24, which is beneficial to improving the thermal management efficiency. Of course, this embodiment does not exclude the case where the distances between the inner walls of the medium flow channels 24 and the outer walls of the thermal management member 20 are not everywhere equal.
In the present embodiment, the medium flow passage 24 penetrates all of the first flat plate portion 21, the second flat plate portion 22, and the connection portion 23 in the thermal management member 20, that is, both ends of the thermal management member 20 in the length direction are provided with the medium inlet and the medium outlet, respectively, so that the heat exchange efficiency of the thermal management member 20 is improved and the safety of the battery pack is improved.
In other embodiments, at least some of the two adjacent thermal management structures 20 are connected such that the medium flow channels 24 in the thermal management structures 20 are in communication, thereby reducing the number of inlets and outlets of the medium flow channels 24 in the battery pack 1.
Specifically, the thermal management of the unit cell 10 may be heat dissipation of the unit cell 10 or heating of the unit cell 10. In practical applications, when it is necessary to dissipate heat from the unit cell 10, a liquid, such as a cooling liquid, is introduced into the medium flow channel 24, and the flowing cooling liquid takes away heat generated by the unit cell 10. When it is necessary to heat the unit cell 10, hot steam, hot water, or the like is introduced into the medium flow path 24, and heat is transferred from the hot steam or the hot water to the unit cell 10. In other embodiments, heating plates may be provided on the first plate portion 21 and the second plate portion 22 of the thermal management member 20, by which the unit cells 10 are heated.
The following are related test methods:
the method for testing the thermal resistance of the filler is as follows:
(1) Completely scraping the filler between adjacent single batteries 10;
(2) Measuring the thickness of the filler for multiple times and taking an average value to obtain the thickness L mm of the filler; alternatively, when the filler almost fills the space between the adjacent unit cells 10, the space between the adjacent unit cells 10 is approximately equal to the thickness of the filler for the convenience of measurement, and the space between the unit cells 10 is measured and averaged several times to obtain D 2 mm, thickness of filler l=d 2 ；
(3) The heat transfer area of the adjacent unit cells 10 is measured and calculated a plurality of times and averaged to obtain S 1 mm 2 ；
(4) According to the formula: r=l/(ρs) 1 )×10 3 Calculating thermal resistance R between adjacent single batteries 10, wherein R is thermal resistance, and the unit is K/W; ρ is the thermal conductivity in W (m×k).
The method for weighing the filler comprises the following steps:
(1) Preparing a container, weighing the container 3 times by adopting an electronic scale, and taking an average value to obtain the weight M of the container 1 g；
(2) Disassembling the battery pack 1, scraping the filler between adjacent single batteries 10, and placing the battery pack in a container;
(3) Weighing the total weight of the container filled with the filler for 3 times, and taking the average value to obtain M 2 g；
(4) Filler weight = M 2 -M 1 。
The method for measuring the maintenance space of the battery pack comprises the following steps:
(1) Removing the outer envelope of the battery pack 1 so that the thermal management part 20 and the unit batteries 10 located in the first and second receiving spaces can be directly observed;
(2) Measuring the minimum length, the minimum width and the minimum height of the single battery 10 in the first accommodating space, the single battery 10 in the second accommodating space and the third accommodating space surrounded by the thermal management component 20 for a plurality of times by adopting a vernier caliper, and taking respective average values;
(3) Calculating the volume V of the third accommodating space by using the values in the step (2) 1 mm 3 ；
(4) Repair space = volume V 1 。
Examples 1 to 16
Provided is a battery pack including a case having a first direction X and a second direction Y orthogonal to each other; a plurality of single batteries 10 arranged in the case; a plurality of thermal management components 20 are disposed in the case at intervals along the first direction X, and the thermal management components 20 include: a plurality of first flat plate portions 21 and a plurality of second flat plate portions 22, the first flat plate portions 21 and the second flat plate portions 22 being alternately arranged in the second direction Y; at least one group of the first plate portion 21 and the second plate portion 22 has a spacing H between the side walls on the same side along the first direction X 2 mm, the adjacent first plate part 21 and second plate part 22 are connected by a connecting part 23; the first flat plate portions 21 of the two adjacent heat management components 20 are oppositely arranged along the first direction X and define a first accommodating space, the second flat plate portions 22 of the two adjacent heat management components 20 are oppositely arranged along the first direction X and define a second accommodating space, the first accommodating space is communicated with the second accommodating space, and one single battery 10 is arranged in each of the first accommodating space and the second accommodating space.
Along the first direction X, a third accommodating space is defined between two adjacent connecting portions 23, and a filler is disposed in the third accommodating space, wherein the filler is ceramic silicone rubber with insulation and heat-insulation properties, the thermal conductivity of the ceramic silicone rubber is 0.35W/(m×k), and the density is 1.5g/cm 3 。
The dimension of the single cell 10 along the first direction X is H 1 mm, the facing area of two adjacent single cells 10 along the second direction Y is the ratio S between the facing area of the single cells 10 and the area of one side of the single cells 10 along the second direction Y 1 /S 2 A second distance D is provided between the first plate portion 21 and the second plate portion 22 adjacent in the second direction Y 2 mm。
Examples 1 to 16 were tested using the test methods described above, and the results are shown in the following table:
referring to examples 1 to 5, it was found that the specification of the cell 10 was unchanged and H was increased 2 At this time, H 2 /H 1 Will increase, the ratio of the facing areas is S 1 /S 2 The thermal resistance and the weight of the filler are reduced, so that the thermal safety can be improved, the manufacturing cost can be reduced, the maintenance space can be reduced, and the three components are not changed greatly.
Referring to examples 2, 6 to 7, 10 and 11, it is possible to increase D 2 The facing area will not change, at this time, the thermal resistance will increase, the maintenance space will increase too, demonstrate the thermal safety and maintenance convenience of the battery pack are all good, but at this time the weight of the filler will increase too, but the three are not changed much.
Referring to examples 2, 8, and 9, it can be obtained to increase H 1 At this time, the thickness of the single battery 10 changes, H 2 /H 1 The ratio of the facing area is reduced, the maintenance space is increased, namely the maintenance cost is reduced, but the thermal resistance is reduced correspondingly, the weight of the filler is increased correspondingly, namely the thermal safety of the battery pack 1 is reduced, the manufacturing cost is increased, and the three components are not changed greatly at the moment.
Referring to examples 12 to 15, it can be obtained that, when S 1 /S 2 When the value of (2) is smaller than the lower limit of the preferred value, the thermal resistance is greatly improved, the weight of the filler is also greatly reduced, the thermal safety of the battery pack 1 is improved, the manufacturing cost is reduced, but the maintenance space is also greatly reduced, the maintenance convenience is reduced, and the subsequent maintenance cost is greatly increased; it is noted that the facing area ratio in example 4 was 0, that is, the adjacent unit cells 10 were completely staggered.
Referring to example 16, it can be obtained that, when S 1 /S 2 Is greater than the upper limit of the preferred value, e.g. S 1 /S 2 When =1, that is, when two adjacent unit batteries 10 are completely aligned, the thermal resistance will be low and the maintenance space will be large, but the weight of the filler will be greatly increased at this time, that is, the manufacturing cost will be greatly increased.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (15)

1. A battery pack, comprising:
a case having a first direction (X) and a second direction (Y) intersecting each other;
a plurality of single batteries (10) arranged in the box body;
a plurality of thermal management components (20) disposed within the tank at intervals along the first direction (X), the thermal management components (20) comprising: a plurality of first flat plate portions (21), a plurality of second flat plate portions (22), and a plurality of connection portions (23), at least a part of the first flat plate portions (21) and the second flat plate portions (22) being alternately arranged along the second direction (Y), and adjacent first flat plate portions (21) and second flat plate portions (22) having a space between side walls on the same side in the first direction (X), the connection portions (23) being disposed between the first flat plate portions (21) and the second flat plate portions (22);
at least two adjacent first flat plate parts (21) of the thermal management component (20) are oppositely arranged along a first direction (X) and define a first accommodating space, at least two adjacent second flat plate parts (22) of the thermal management component (20) are oppositely arranged along the first direction (X) and define a second accommodating space, the first accommodating space is communicated with the second accommodating space, and at least one single battery (10) is arranged in each of the first accommodating space and the second accommodating space.
2. The battery pack according to claim 1, wherein the unit cells (10) are disposed between two adjacent connection portions (23) of the thermal management component (20), the unit cells (10) having third and fourth side walls disposed opposite each other along the second direction (Y), and wherein a projection of the connection portions (23) on a plane in which the third side walls lie at least partially covers the third side walls along the second direction (Y); and/or the projection of the connecting part (23) on the plane of the fourth side wall at least partially covers the fourth side wall.
3. The battery pack according to claim 1, wherein in the first direction (X), the first flat plate portion (21) and the second flat plate portion (22) have a first distance D therebetween 1 mm, a second distance D is provided between the first plate part (21) and the second plate part (22) adjacent along the second direction (Y) 2 mm, satisfy: d is more than or equal to 0.01 1 /D 2 ≤100。
4. The battery pack of claim 3, wherein the first distance D 1 The method meets the following conditions: d is more than or equal to 0.3 1 Less than or equal to 50, and/or the second distance D 2 The method meets the following conditions: d is more than or equal to 0.3 2 ≤50。
5. The battery pack according to claim 1, wherein the first flat plate portion (21), the second flat plate portion (22), and the connection portion (23) are each at least partially covered with an insulating layer.
6. The battery pack of claim 1, wherein the spacing is H 2 mm, the dimension of the single battery (10) along the first direction (X) is H 1 mm, satisfy: h is more than 0.03 and less than 2 /H 1 ＜0.8。
7. The battery pack according to claim 6, wherein the unit cells (10) have a dimension H in the first direction (X) 1 mm, satisfy: h is more than 0.1 and less than 2 /H 1 ＜0.6。
8. The battery pack of claim 1, wherein the battery pack satisfies: 50. not less than H 2 ≥2.5。
9. The battery pack according to claim 1, wherein at least a part of the unit cells (10) have a facing area S of two unit cells (10) adjacent in the second direction (Y) 1 mm 2 The area of one side of the single battery (10) along the second direction (Y) is S 2 mm 2 The method comprises the following steps: s is more than 0.2 and less than 1 /S 2 ＜1。
10. The battery pack according to claim 1, wherein a third receiving space is defined between adjacent two of the connecting portions (23) in the first direction (X), and a filler is provided in the third receiving space, the filler including at least one of a heat insulating member, an insulating member, and a buffer member.
11. The battery pack according to claim 1, wherein the unit cells (10) include first and second side walls disposed opposite to each other in the first direction (X), the first and second side walls having equal surface areas and being the side walls having the largest surface areas of the unit cells (10), the first and second side walls being in contact with the adjacent first flat plate portions (21), respectively, or the first and second side walls being in contact with the adjacent second flat plate portions (22), respectively.
12. The battery pack according to claim 1, wherein the first flat plate portion (21), the second flat plate portion (22), and the connection portion (23) are of an integral structure.
13. The battery pack according to claim 1, wherein a medium flow passage (24) is provided in the thermal management member (20), the medium flow passage (24) penetrating through the first flat plate portion (21), the connection portion (23), and the second flat plate portion (22) in the extending direction of the thermal management member (20).
14. The battery pack according to claim 1, wherein the first flat plate portion (21) and the second flat plate portion (22) are disposed in parallel.
15. A vehicle comprising the battery pack of any one of claims 1 to 14.
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province

Patentee after: Xinwangda Power Technology Co.,Ltd.

Address before: 518132 1-2/F, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen, Guangdong Province

Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd.