CN113394481A - Battery radiator and battery pack - Google Patents

Battery radiator and battery pack Download PDF

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Publication number
CN113394481A
CN113394481A CN202110797859.XA CN202110797859A CN113394481A CN 113394481 A CN113394481 A CN 113394481A CN 202110797859 A CN202110797859 A CN 202110797859A CN 113394481 A CN113394481 A CN 113394481A
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CN
China
Prior art keywords
battery
heat sink
radiator
heat
ventilation hole
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.)
Pending
Application number
CN202110797859.XA
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Chinese (zh)
Inventor
李�杰
邹序平
林倡全
吴佳凡
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.)
Zhuhai Cosmx Power Battery Co Ltd
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Zhuhai Cosmx Power 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.)
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Publication date
Application filed by Zhuhai Cosmx Power Battery Co Ltd filed Critical Zhuhai Cosmx Power Battery Co Ltd
Priority to CN202110797859.XA priority Critical patent/CN113394481A/en
Publication of CN113394481A publication Critical patent/CN113394481A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • 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
    • 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
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • 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
    • 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
    • H01M50/572—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
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a battery radiator and a battery pack. The battery radiator is used for being in thermal contact with a lug of a battery, at least one ventilation hole is formed in the side face of the battery radiator and penetrates through the two side faces of the battery radiator, and a plurality of radiating fins are arranged in the at least one ventilation hole. The invention provides a battery radiator and a battery pack, which are used for at least solving the technical problems of low radiating efficiency and poor radiating effect of battery tabs.

Description

Battery radiator and battery pack
Technical Field
The invention relates to the technical field of battery heat dissipation, in particular to a battery radiator and a battery pack.
Background
Unmanned aerial vehicle has more and more generally used transportation, industry and agricultural field, and when unmanned aerial vehicle carried out the operation in the air, the battery lasted discharge, and the battery itself generates heat more seriously, especially under unmanned aerial vehicle was in the condition of high-power operating mode, the battery often had comparatively serious problem of generating heat in the use. If the heat generated by the battery cannot be timely dissipated, a large amount of heat can be accumulated to cause the temperature rise of the battery, the efficiency of the battery can be reduced due to the excessively high temperature of the battery, the service life of the battery can be shortened, and even a safety accident can occur in the serious case.
The battery radiator is a device for battery heat dissipation, the existing battery radiator usually adopts a water cooling or air cooling mode to realize the heat dissipation of the battery, the water cooling mode has a low temperature control range, is greatly influenced by the external environment, has high cost, and the air cooling mode has the defects of uneven cooling and low cooling efficiency. By the limitation of the structure of the battery pack, when the battery pack works, heat generated by the pole lugs and heat conducted to the pole lugs by the battery cell are difficult to effectively radiate outwards, the temperature rise of the battery pack is large due to the large heat concentration, and particularly the service life of the battery pack is seriously influenced for the high-power and high-heat-flow-density battery pack.
Therefore, how to improve the heat dissipation efficiency of the battery tab and improve the heat dissipation effect of the battery pack is one of the technical problems to be solved urgently at present.
Disclosure of Invention
The invention provides a battery radiator and a battery pack, which are used for at least solving the technical problems of low radiating efficiency and poor radiating effect of battery tabs.
In order to achieve the above object, the present invention provides a battery heat sink and a battery pack. The battery radiator is used for being in thermal contact with the tabs of the battery, and a plurality of radiating fins are arranged inside the battery radiator.
The battery radiator is used for being in thermal contact with the tabs of the battery, so that heat exchange between the battery radiator and the tabs can be realized, and the plurality of radiating fins are arranged for increasing the radiating area of the battery radiator and accelerating the radiating, so that the radiating effect is improved.
In a possible implementation manner, at least one ventilation hole is formed in a side surface of the battery heat sink, the at least one ventilation hole penetrates through two side surfaces of the battery heat sink, and the plurality of heat dissipation fins are arranged in the at least one ventilation hole.
According to the battery radiator provided by the invention, the side surface of the battery radiator is provided with at least one ventilation hole, so that external air can conveniently enter the ventilation hole from the side surface of the radiator, and the heat conducted to the battery radiator by the lug of the battery is taken away; the ventilation holes penetrate through the two side faces of the battery radiator, and are beneficial to forming a channel for air circulation in the ventilation holes, air can enter the ventilation holes from the two side faces of the battery radiator, the air can quickly circulate in the ventilation holes, heat conducted to the battery radiator by the lugs is taken away, and the heat dissipation efficiency is improved.
In a possible implementation manner, the plurality of radiating fins are longitudinally arranged and spaced from each other, and the upper end and the lower end of each of the plurality of radiating fins are connected with the inner wall of the ventilation hole;
the plurality of radiating fins extend from one end of the at least one ventilation hole to the other end of the at least one ventilation hole.
In a possible embodiment, the top surface of the battery heat sink is provided with a cavity for accommodating a battery management system, the cavity being located above and isolated from the at least one vent hole.
In a possible implementation manner, first preformed holes are arranged in the cavity, the first preformed holes all penetrate through the bottom of the cavity, and the first preformed holes are all isolated from the at least one ventilation hole;
still be provided with the second preformed hole in the cavity, the second preformed hole with ventilation hole mutual isolation.
In one possible embodiment, the battery heat sink has a bottom surface facing away from the cavity, and the bottom surface is provided with a pre-groove.
In a possible implementation manner, the top surface of the battery radiator is further provided with an upper limiting groove, and the upper limiting groove is recessed inwards along the wall thickness direction of the battery radiator.
In a possible implementation manner, two ends of the battery radiator are respectively provided with a pair of mounting columns, and connecting holes are formed in the mounting columns; and the bottom of the mounting column is provided with a lower limiting groove.
The invention also provides a battery pack which comprises a shell, a battery core body, a battery management system, an upper cover and the battery radiator, wherein the battery core body is accommodated in the shell;
the battery management system is attached to the bottom surface of the cavity, and the bottom surface of the battery radiator is directly or indirectly contacted with a lug arranged on the battery cell body, so that the heat generated by the battery management system and the battery cell body is radiated by conduction through the battery radiator.
In one possible implementation manner, the bottom surface of the battery heat sink is in thermal contact with the cell body through a heat conduction member, one side of the heat conduction member is attached to the cell body, and the other side of the heat conduction member is attached to the reserved groove of the battery heat sink.
In a possible implementation manner, an adapter plate is further disposed on the cell body, a lead line is disposed on the adapter plate, the tab extends onto the adapter plate, and at least a portion of the tab is electrically connected to the lead line on the adapter plate.
In a possible implementation manner, the battery radiator is located on the adapter plate, and the lead row extends to the upper part of the battery radiator through a first reserved hole formed in the battery radiator;
an insulating layer is arranged between the bottom surface of the battery radiator and the adapter plate.
In a possible implementation manner, the lower end of the upper cover abuts against the upper limiting groove of the battery radiator, the lower limiting groove of the battery radiator abuts against the upper end of the shell, and the battery radiator is connected to the shell through a fastening piece.
In a possible embodiment, an interface is provided on one side of the upper cover.
The battery radiator provided by the invention has a simple structure, is convenient for cooling and radiating the lug, is also convenient for installing and fixing the battery management system, fully utilizes the space inside the battery radiator to fix the battery management system, cools and radiates the battery management system, and is beneficial to improving the radiating effect of the battery.
According to the battery pack provided by the invention, the insulating layer is arranged between the bottom surface of the battery radiator and the adapter plate, so that an insulating protection effect is achieved, the bottom surface of the battery radiator can be directly contacted with the lug, heat conduction and insulating protection can be realized, a heat dissipation path is optimized, efficient heat management is realized, and the service life of the battery pack is prolonged.
In the battery pack provided by the invention, the battery management system is attached to the bottom surface of the concave cavity of the battery radiator, so that the battery management system can directly and quickly conduct heat to the battery radiator, the temperature of a control component on the battery management system can be effectively reduced, and the stable operation of the battery management system is ensured.
In the battery pack provided by the invention, the bottom surface of the battery radiator is in thermal contact with the lug arranged on the battery core body, the lug on the battery core body can transfer heat to the battery radiator, so that the thermal resistance of the lug in transferring heat to the battery radiator is reduced, and the battery radiator is arranged, so that high-efficiency heat dissipation is realized, the lug is cooled, the heat dissipation cost of the battery pack is reduced, and the light weight of the battery pack is facilitated.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions, other technical problems that can be solved by a battery heat sink and a battery pack provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a battery heat sink according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a battery heat sink according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an installation effect of a battery heat sink according to an embodiment of the present invention;
fig. 4 is an effect diagram of the installation of the battery heat sink and the tabs according to the embodiment of the present invention;
fig. 5 is an exploded view of a battery pack according to an embodiment of the present invention.
Description of reference numerals:
10-a battery heat sink;
11-a vent hole;
12-heat dissipation fins;
13-a bottom surface;
131-an insulating layer;
14-a cavity;
141-an upper limiting groove;
15-reserving a groove;
16-a first preformed hole;
17-a second preformed hole;
18-mounting posts;
181-connecting hole;
182-through groove;
19-a lower limiting groove;
20-a cell body;
21-a tab;
30-upper cover;
31-an interface;
40-a battery management system;
50-an adapter plate;
51-lead row;
60-a housing;
70-heat conducting member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The battery package during operation, main heat production position is electric core body, utmost point ear simultaneously, and battery management system also can produce the heat, the heat that electric core body produced can be passed through the casing effluvium of battery, but receive the restriction of battery package structural layout, the heat that utmost point ear produced, the heat of utmost point ear is given in the electric core conduction, and the heat that battery management system produced is difficult to effectively outwards effluvium, the heat gathers in a large number and leads to the temperature rise of battery package big, the life reduction of battery package, influence the battery and use under the high-power high energy consumption's such as unmanned aerial vehicle scene, be difficult to realize under limited condition high-power, the abundant heat dissipation of high heat flux density battery package.
Therefore, it is one of the technical problems to be solved urgently at present how to break through the limitation of the structural layout of the battery pack and improve the heat dissipation effect of the battery pack.
In view of the above background, in the battery heat sink and the battery pack provided by the present invention, since the at least one ventilation hole is formed in the side surface of the battery heat sink, air can circulate through the ventilation hole, and the plurality of heat dissipation fins are disposed in the at least one ventilation hole, so that a contact area between the air circulating through the ventilation hole and the battery heat sink is increased, thereby improving a heat dissipation effect. In the battery pack provided by the invention, because the bottom surface of the battery radiator is directly or indirectly contacted with the lug, the heat at the lug position can be conducted to the battery radiator to be dissipated in time, and the service life of the battery pack is prevented from being influenced by heat accumulation.
The following describes a battery heat sink and a battery pack according to an embodiment of the present invention with reference to the drawings.
Referring to fig. 1 and 2, the present invention provides a battery heat sink 10 for thermally contacting tabs 21 of a battery, the battery heat sink 10 having a plurality of heat dissipating fins 12 disposed therein. The plurality of heat dissipation fins 12 are used to increase the heat dissipation area of the battery heat sink 10, thereby accelerating heat dissipation and improving the heat dissipation effect.
At least one ventilation hole 11 is opened on the side of battery radiator 10, and at least one ventilation hole 11 link up the both sides face of battery radiator 10, and a plurality of radiating fin 12 sets up in at least one ventilation hole 11.
Referring to fig. 1 and 4, a battery heat sink 10 according to an embodiment of the present invention is configured to dissipate heat of a tab 21 of a battery, where at least one ventilation hole 11 is formed in a side surface of the battery heat sink 10, so that external air can enter the ventilation hole 11 from the side surface of the heat sink 10 to take away heat conducted from the tab 21 of the battery to the battery heat sink 10; ventilation hole 11 link up battery radiator 10's both sides face, help forming the passageway of circulation of air in ventilation hole 11, the air can all enter into ventilation hole 11 from battery radiator 10's both sides face, realize the air and circulate fast in ventilation hole 11, take away the heat of conduction for battery radiator 10, improve the radiating efficiency, and be provided with a plurality of radiating fin 12 in at least one ventilation hole 11, accelerate the heat dissipation, thereby improve the radiating effect.
It is easy to understand that the battery heat sink 10 is in thermal contact with the tab 21 of the battery, so that heat generated by the tab 21 of the battery and heat conducted to the tab 21 by the cell body 20 of the battery can be conducted to the battery heat sink 10 to realize heat exchange.
In a possible implementation manner, referring to fig. 1 and 2, two ventilation holes 11 are opened on a side surface of the battery heat sink 10, the two ventilation holes 11 are arranged side by side, and a plurality of heat dissipation fins 12 are disposed in each of the two ventilation holes 11. The plurality of heat dissipation fins 12 are vertical. The number of the heat dissipation fins 12 may be 5, 7, 10, etc., and the number of the heat dissipation fins 12 is set according to the use requirement, which is not specifically limited herein.
The plurality of radiating fins 12 are longitudinally arranged and spaced from each other, and the upper end and the lower end of each radiating fin 12 are connected with the inner wall of the ventilation hole 11. With the structure, heat conducted to the battery radiator 10 from the battery tabs 21 can be quickly and uniformly conducted to the radiating fins 12, so that the air circulating into the ventilation holes 11 can take away the heat conducted to the radiating fins 12, the exchange between the heat and the outside air is accelerated, and the radiating effect is improved. And a plurality of radiating fin 12 all extends to the other end of at least one ventilation hole 11 from the one end of at least one ventilation hole 11 for a plurality of radiating fin 12 can the limited space in make full use of ventilation hole 11 enlarge radiating area of radiating fin 12, thereby improves the radiating efficiency, is favorable to rapid cooling.
Of course, in other embodiments, more vent holes 11 may be opened on the side of the battery heat sink 10. The heat dissipating fins 12 may be inclined, and the inclination directions of the heat dissipating fins 12 in the plurality of air vents 11 may be the same or different.
Referring to fig. 1 and 3, the top surface of the Battery heat sink 10 is provided with a cavity 14 for receiving a Battery Management System 40 (BMS) of the Battery, the cavity 14 is located above the at least one vent hole 11, and the cavity 14 and the at least one vent hole 11 are isolated from each other. The battery management system 40 may be connected to the battery heat sink 10 by screws, the cavity 14 formed at the top of the battery heat sink 10 provides an installation space for the battery management system 40, and the battery management system 40 is a control system for the battery and monitors the use state of the battery.
It is easy to understand that the battery management system 40 includes a control board and control components disposed on the control board, so that the battery management system 40 also generates heat during operation, and since the cavity 14 for accommodating the battery management system 40 is located above the at least one ventilation hole 11, the heat generated during operation of the battery management system 40 is favorably conducted to the heat dissipation fins 12 through the bottom surfaces of the cavities 14, and the heat conducted to the heat dissipation fins 12 is taken away through the air flowing into the ventilation holes 11, thereby ensuring the heat dissipation of the battery management system 40.
In one possible embodiment, the battery heat sink 10 may be cube-shaped. The cavity 14 is a rectangular cavity recessed downward.
Referring to fig. 2 and 3, a first prepared hole 16 is provided in the cavity 14, the first prepared holes 16 all penetrate through the bottom of the cavity 14, and the first prepared holes 16 are all isolated from at least one vent hole 11, where a pair of first prepared holes 16 are provided in the cavity 14, a pair of first prepared holes 16 all penetrate through the bottom of the cavity 14, and a pair of first prepared holes 16 are all isolated from at least one vent hole 11. The first prepared hole 16 is used for a lead bar 51 connected inside the battery to pass through, so that the lead bar 51 connected with the battery core body 20 of the battery passes through the first prepared hole 16 to be electrically connected with the battery management system 40, and the first prepared hole 16 is mainly used for threading the lead bar 51.
In one possible implementation, the electric wire connected to the cell body 20 may be a power wire or the like.
In a possible embodiment, the first preformed holes 16 may be rectangular, oval, etc., and a pair of the first preformed holes 16 are respectively located at two ends of the cavity 14 in the length direction, so as to be isolated from one ventilation hole 11.
A second prepared hole 17 is further formed in the cavity 14, and the second prepared hole 17 is isolated from the vent hole 11. The second prepared hole 17 is used for passing a communication line connected to the inside of the battery.
In a possible implementation manner, the second reserved hole 17 may be rectangular, circular, oval, or the like, there may be two second reserved holes 17, the second reserved hole 17 is located in the middle of the length direction of the cavity 14, and the two second reserved holes 17 are located on two sides of the width direction of the cavity 14 respectively, so that the second reserved hole 17 and the vent hole 11 are isolated from each other.
The battery radiator 10 has a bottom surface 13 facing away from the cavity 14, and a pre-groove 15 is formed in the bottom surface 13, and the pre-groove 15 is located in the middle of the bottom surface 13.
In a possible embodiment, the preformed groove 15 is a rectangular groove recessed toward the bottom surface 13, but the preformed groove 15 may also be oval or the like. The reserve groove 15 is located between two second reserve holes 17.
Referring to fig. 3 and 4, the preformed groove 15 is used for accommodating the heat conduction member 70 in contact with the tab 21, and ensures that the heat conduction member 70 is in contact with the battery heat sink 10, so that heat generated by the tab 21 can be conducted to the battery heat sink 10 through the heat conduction member 70, and then the battery heat sink 10 performs heat exchange with the outside. The heat-conducting member 70 may be a heat-conducting pad, for example, in the shape of a strip.
Referring to fig. 1 and 2, the top surface of the battery heat sink 10 is further provided with an upper limiting groove 141, and the upper limiting groove 141 is recessed inward along the wall thickness direction of the battery heat sink 10. The upper limiting groove 141 serves to limit the position of the upper cover 30 of the battery mounted on the battery heat sink 10.
The battery heat sink 10 has a pair of mounting posts 18 at both ends thereof, the side walls of the pair of mounting posts 18 are connected to both end surfaces of the battery heat sink 10, and the mounting posts 18 are provided with connecting holes 181.
The pair of mounting posts 18 may be respectively located at two ends of the battery heat sink 10 in the width direction, a through slot 182 is formed between the pair of mounting posts 18, and the connecting hole 181 may be a threaded hole to facilitate the mounting of the battery heat sink 10 to the housing 60 of the battery by a screw.
The bottom of the mounting post 18 is opened with a lower limit groove 19, and the lower limit groove 19 is used for limiting the mounting position of the battery heat sink 10 when the battery heat sink 10 is mounted.
The battery radiator 10 provided by the embodiment of the invention has a simple structure, is convenient for cooling and radiating the tab 21 of the battery, is also convenient for installing and fixing the battery management system 40, fully utilizes the space inside the battery radiator 10 to fix the battery management system 40, cools and radiates the battery management system 40, and is beneficial to improving the radiating effect of the battery.
According to the battery radiator 10 provided by the embodiment of the invention, the pair of mounting columns 18 is arranged, so that the battery can be conveniently mounted and fixed, and the battery radiator 10 and the shell 60 of the battery can be conveniently and fixedly connected.
On the basis, referring to fig. 3 and fig. 5, an embodiment of the present invention further provides a battery pack, which includes a casing 60, a cell body 20, a battery management system 40, an upper cover 30, and the above battery heat sink 10, where the cell body 20 is accommodated in the casing 60, the battery heat sink 10 is disposed on the casing 60, the battery management system 40 is accommodated in a cavity 14 formed at the top of the battery heat sink 10, and the upper cover 30 is disposed on the battery heat sink 10.
The battery management system 40 is attached to the bottom surface of the cavity 14, and the bottom surface 13 of the battery heat sink 10 is in direct or indirect contact with the tabs 21 disposed on the cell body 20, so that the heat generated by the battery management system 40 and the cell body 20 is dissipated by conducting the heat to the battery heat sink 10. Heat can be transferred from the high temperature tab 21 to the low temperature battery heat sink 10.
In one possible embodiment, the bottom surface 13 of the battery heat sink 10 and the tabs 21 provided on the cell body 20 are abutted against each other, so that heat is directly exchanged between the battery heat sink 10 and the tabs 21, which helps heat to be transferred from the tabs 21 having a high temperature to the battery heat sink 10 having a low temperature, and heat dissipation effect of the tabs 21 is improved by balancing the heat.
In another possible implementation manner, heat is transferred between the bottom surface 13 of the battery heat sink 10 and the tab 21 disposed on the cell body 20 through the heat conducting member 70 or the heat conducting glue, so that the tab 21 with a higher temperature conducts heat to the battery heat sink 10 with a lower temperature through the heat conducting member 70 or the heat conducting glue, and the heat conducting member 70 or the heat conducting glue can reduce thermal resistance between the tab 21 and the battery heat sink 10, thereby improving heat conduction until the heat is balanced, and improving the heat dissipation effect of the tab 21.
In the battery pack provided by the embodiment of the invention, at least one vent hole 11 is formed in the side surface of the adopted battery radiator 10, the vent hole 11 penetrates through the two side surfaces of the battery radiator 10, the plurality of radiating fins 12 are arranged in the vent hole 11, the radiating area of the surface of the battery is increased by the radiating fins 12, and the surface thermal resistance of the battery is reduced, so that the heat conducted to the battery radiator 10 can be quickly radiated to the outside, the radiating efficiency and the radiating effect are improved, for a high-power and high-heat-flow-density battery, the heat generated during the operation of the battery can be ensured to be timely radiated to the outside, and the phenomenon that a large amount of heat is accumulated in the battery core body 20 and the position of the tab 21 to influence the working efficiency of the battery pack is avoided, and the service life of the battery pack is shortened.
In the battery pack provided by the embodiment of the invention, the battery management system 40 can be connected with the battery radiator 10 through screws, and the battery management system 40 is attached to the bottom surface of the cavity 14, so that the temperature of control components on the battery management system 40 can be effectively reduced, and the stable operation of the battery management system 40 is ensured.
Referring to fig. 3 and 5, the upper cover 30 may be screwed to the battery heat sink 10, and the battery heat sink 10 may be screwed to the case 60.
The bottom surface 13 of the battery heat sink 10 is thermally conductive to the cell body 20 through the thermal conductor 70, one side of the thermal conductor 70 is attached to the cell body 20, and the other side of the thermal conductor 70 is attached to the preformed groove 15 of the battery heat sink 10. The thermal conductive member 70 may be a thermal pad, and the thermal conductive member 70 is used to reduce thermal resistance between the cell body 20 and the battery heat sink 10, so that heat generated by the cell body 20 is directly conducted to the battery heat sink 10 through the thermal conductive member 70.
The cell body 20 is further provided with an adapter plate 50, the adapter plate 50 is provided with a lead row 51, the tabs 21 extend onto the adapter plate 50, and at least part of the tabs 21 are electrically connected with the lead row 51 on the adapter plate 50.
The battery heat sink 10 is located on the interposer 50, and the lead row 51 extends to the upper side of the battery heat sink 10 through the first prepared hole 16 opened on the battery heat sink 10.
In one possible implementation, the lead row 51 includes a positive lead row and a negative lead row. The first prepared holes 16 have a pair, and the positive lead row and the negative lead row extend upward from the pair of first prepared holes 16 to the battery heat sink 10, respectively.
Referring to fig. 3 and 4, in order to improve the safety of use, an insulating layer 131 is disposed between the bottom surface 13 of the battery heat sink 10 and the interposer 50, so that the bottom surface 13 of the battery heat sink 10 can directly contact with the tabs 21 extending to the interposer 50, which can not only conduct heat but also protect the tabs 21 in an insulating manner, optimize the heat dissipation path of the tabs 21, achieve efficient thermal management of the battery cell body 20, and prolong the service life of the battery pack.
The insulating layer 131 may be adhered to the bottom surface 13 of the battery heat sink 10, and the insulating layer 131 may be made of one or more of thermal conductive silica gel, polyester resin (PET) and Polymer (PTC) materials, so as to improve the insulating reliability and safety protection of the battery.
In a possible implementation, the lead line 51 may be a copper line or an aluminum line.
In the battery pack provided by the embodiment of the present invention, the battery cell body 20 is used for generating electric energy, the battery management system 40 is a control system of the battery, and monitors a use state of the battery, the casing 60 and the upper cover 30 are used for protecting the battery cell body 20, and the upper cover 30 is also used for protecting the battery management system 40. The battery radiator 10 can effectively optimize the heat dissipation path of the core body 20 to the outside, realize the efficient heat management of the battery, and prolong the service life of the battery.
It is easy to understand that, utmost point ear 21 includes the anodal utmost point ear and the negative pole utmost point ear of outwards drawing the electric energy in the electric core body 20, and the heat conduction pad can be a plurality ofly, laminates one side of part heat conduction pad with the side of anodal utmost point ear 21, laminates one side of another part heat conduction pad with the side of negative pole utmost point ear 21, strengthens the heat conduction effect between utmost point ear 21 to battery radiator 10 through the heat conduction pad.
In this embodiment, the thermal pad may be made of a thermal conductive material, such as thermal conductive silicone.
It is easily understood that after the positive electrode tab and the negative electrode tab are connected in series, the formed positive electrode terminal is connected in series with the positive electrode lead line, and the formed negative electrode terminal is connected in series with the negative electrode lead line.
The lower end of the upper cover 30 abuts against the upper limit groove 141 of the battery heat sink 10, the lower limit groove 19 of the battery heat sink 10 abuts against the upper end of the case 60, and the battery heat sink 10 is attached to the case 60 by a fastener. The upper limit groove 141 serves to limit the battery when the upper cover 30 is mounted, and the lower limit groove 19 serves to limit the battery when the battery heat sink 10 is mounted to the case 60.
In one possible embodiment, the fastener may be a screw.
One side of the upper cover 30 is provided with an interface 31, and the interface 31 is used for connecting an external device, so that the external device is electrically connected with the battery management system 40.
The battery pack provided by the embodiment of the invention can meet the use requirements of an unmanned aerial vehicle under high-power working conditions such as continuous flight and the like, and provides a cooling and radiating effect for the battery through the battery radiator 10 in a high-power operation state, so that the influence on the service life due to overhigh temperature rise of the battery is avoided.
In the battery pack provided by the embodiment of the invention, the heat resistance of the heat transfer of the battery core body 20 can be effectively reduced, the bottom surface 13 of the battery radiator 10 is in contact with the lug 21 arranged on the battery core body 20 through the heat conducting piece 70, the heat resistance of the lug 21 transferring heat to the battery radiator 10 is reduced, and by arranging the battery radiator 10, efficient heat dissipation is realized, the heat dissipation cost of the battery is reduced, and the light weight of the battery is facilitated.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, are used to indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be of particular construction and operation, and thus, are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (14)

1. The battery radiator is characterized in that the battery radiator is used for being in thermal contact with tabs (21) of a battery, and a plurality of radiating fins (12) are arranged inside the battery radiator (10).
2. The battery heat sink according to claim 1, wherein at least one ventilation hole (11) is opened on a side surface of the battery heat sink (10), the at least one ventilation hole (11) penetrates through two side surfaces of the battery heat sink (10), and the plurality of heat dissipation fins (12) are disposed in the at least one ventilation hole (11).
3. The battery radiator according to claim 2, wherein the plurality of radiating fins (12) are longitudinally arranged and spaced from each other, and the upper and lower ends of the plurality of radiating fins (12) are connected to the inner wall of the ventilation hole (11);
the plurality of radiating fins (12) extend from one end of the at least one ventilation hole (11) to the other end of the at least one ventilation hole (11).
4. The battery heat sink according to claim 3, characterized in that the top surface of the battery heat sink (10) is provided with a cavity (14) for accommodating a battery management system (40), the cavity (14) being located above the at least one ventilation hole (11) and being isolated from the at least one ventilation hole (11).
5. The battery radiator according to claim 4, characterized in that first prepared holes (16) are arranged in the cavity (14), the first prepared holes (16) all penetrate through the bottom of the cavity (14), and the first prepared holes (16) are all isolated from the at least one vent hole (11);
still be provided with second preformed hole (17) in cavity (14), second preformed hole (17) with ventilation hole (11) mutual isolation.
6. The battery heat sink according to claim 4, characterized in that the battery heat sink (10) has a bottom surface (13) facing away from the cavity (14), the bottom surface (13) being provided with a pre-groove (15).
7. The battery heat sink according to any one of claims 1-6, wherein the top surface of the battery heat sink (10) is further provided with an upper limiting groove (141), and the upper limiting groove (141) is recessed inwards along the wall thickness direction of the battery heat sink (10).
8. The battery radiator according to any one of claims 1-6, wherein both ends of the battery radiator (10) are provided with a pair of mounting posts (18), and the mounting posts (18) are internally provided with connecting holes (181);
the bottom of the mounting column (18) is provided with a lower limiting groove (19).
9. A battery pack, comprising a casing (60), a cell body (20), a battery management system (40), an upper cover (30) and the battery heat sink (10) of any one of claims 1 to 8, wherein the cell body (20) is accommodated in the casing (60), the battery heat sink (10) is disposed on the casing (60), the battery management system (40) is accommodated in a cavity (14) formed at the top of the battery heat sink (10), and the upper cover (30) is disposed on the battery heat sink (10);
the battery management system (40) is attached to the bottom surface of the cavity (14), and the bottom surface (13) of the battery radiator (10) is in direct or indirect contact with a tab (21) arranged on the battery cell body (20), so that heat generated by the battery management system (40) and the battery cell body (20) is radiated by conduction to the battery radiator (10).
10. The battery pack according to claim 9, wherein the bottom surface (13) of the battery heat sink (10) is in thermal contact with the cell body (20) through a heat conducting member (70), one side of the heat conducting member (70) is attached to the cell body (20), and the other side of the heat conducting member (70) is attached to the preformed groove (15) of the battery heat sink (10).
11. The battery pack according to claim 9, wherein an interposer (50) is further disposed on the cell body (20), a lead line (51) is disposed on the interposer (50), the tabs (21) extend onto the interposer (50), and at least a portion of the tabs (21) are electrically connected to the lead line (51) on the interposer (50).
12. The battery pack according to claim 11, wherein the battery heat sink (10) is located on the interposer (50), and the lead row (51) extends above the battery heat sink (10) through a first prepared hole (16) formed in the battery heat sink (10);
an insulating layer (131) is arranged between the bottom surface (13) of the battery radiator (10) and the adapter plate (50).
13. The battery pack according to claim 12, wherein the lower end of the upper cover (30) abuts on the upper limit groove (141) of the battery heat sink (10), the lower limit groove (19) of the battery heat sink (10) abuts on the upper end of the case (60), and the battery heat sink (10) is attached to the case (60) by a fastener.
14. The battery pack according to claim 9, wherein an interface (31) is provided at one side of the upper cover (30).
CN202110797859.XA 2021-07-14 2021-07-14 Battery radiator and battery pack Pending CN113394481A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022228565A1 (en) * 2021-04-30 2022-11-03 东莞新能安科技有限公司 Battery pack and power consuming device
WO2023082051A1 (en) * 2021-11-09 2023-05-19 深圳市大疆创新科技有限公司 Battery assembly and unmanned aerial vehicle
WO2023098878A1 (en) * 2021-12-02 2023-06-08 东莞新能安科技有限公司 Battery pack, method for manufacturing battery pack, and electric apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022228565A1 (en) * 2021-04-30 2022-11-03 东莞新能安科技有限公司 Battery pack and power consuming device
WO2023082051A1 (en) * 2021-11-09 2023-05-19 深圳市大疆创新科技有限公司 Battery assembly and unmanned aerial vehicle
WO2023098878A1 (en) * 2021-12-02 2023-06-08 东莞新能安科技有限公司 Battery pack, method for manufacturing battery pack, and electric apparatus

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