WO2020118548A1 - Dispositif utilisant une conception thermique d'un bloc-batterie - Google Patents

Dispositif utilisant une conception thermique d'un bloc-batterie Download PDF

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Publication number
WO2020118548A1
WO2020118548A1 PCT/CN2018/120501 CN2018120501W WO2020118548A1 WO 2020118548 A1 WO2020118548 A1 WO 2020118548A1 CN 2018120501 W CN2018120501 W CN 2018120501W WO 2020118548 A1 WO2020118548 A1 WO 2020118548A1
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WO
WIPO (PCT)
Prior art keywords
chamber
section
cooling
battery pack
thermal design
Prior art date
Application number
PCT/CN2018/120501
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English (en)
Chinese (zh)
Inventor
彭再武
娄岗
刘进程
黄河
张彪
言艳毛
Original Assignee
湖南中车时代电动汽车股份有限公司
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Application filed by 湖南中车时代电动汽车股份有限公司 filed Critical 湖南中车时代电动汽车股份有限公司
Priority to PCT/CN2018/120501 priority Critical patent/WO2020118548A1/fr
Publication of WO2020118548A1 publication Critical patent/WO2020118548A1/fr

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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
    • H01M10/60—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
    • H01M10/65—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

Definitions

  • the invention relates to the technical field of battery heat dissipation, in particular to a device based on battery pack heat design, which is a dual heat exchange system combining phase change and liquid cooling.
  • the operating temperature of the battery module is too high or too low, or the temperature in the battery module is inconsistent. If the temperature of the battery module is too high, the heat generated by the current flow and the electrochemical reaction during the work process will cause the battery pack temperature to rise. High, affecting its internal resistance, voltage, SOC, available capacity and battery life, etc., may lead to potential safety hazards; if the battery cell temperature of the battery module is inconsistent, the accumulation of heat generated by the battery module will cause uneven temperature everywhere, affecting Consistency, reduce charge and discharge cycle efficiency, and even lead to thermal runaway of battery cells. Therefore, it is particularly important to cool the battery module and reduce the temperature difference of the battery module in order to maintain the operating temperature of the battery module within an appropriate range.
  • air cooling has a small heat transfer coefficient, which cannot meet the heat dissipation requirements of battery modules with increasing heat load.
  • Heat dissipation requirements of battery modules under complex working conditions phase change materials have problems such as low thermal conductivity and weak thermal conductivity, which are likely to cause heat accumulation of battery modules; although liquid cooling methods have fast cooling speeds, there are leakages, etc. safe question.
  • the purpose of the present invention is to provide a device based on the thermal design of the battery pack, which can improve the heat dissipation efficiency of the battery module, effectively control the temperature difference between the battery cells in the battery module, and has high safety and simple structure.
  • the present invention provides a device based on the thermal design of a battery pack, which includes an open box with an accommodating cavity for accommodating a battery module;
  • a first chamber is provided at the bottom of the accommodating chamber portion, two opposite sides of the accommodating chamber portion are provided with second chambers, and the first chamber communicates with the two second chambers;
  • the first chamber and the two second chambers are filled with a phase change medium;
  • the box is further provided with a cooling channel through which a cooling liquid circulates;
  • the cooling channel is located outside the second chamber, and at least a part of the wall portion forming the second chamber and the cooling channel are formed Wall heat exchange coordination;
  • the first chamber is an evaporation section
  • the second chamber is a condensation section
  • the present invention provides a device based on battery pack thermal design, which uses a combination of phase change medium cooling and liquid cooling to dissipate heat to the battery module. That is to say, the device is actually a double change of phase change plus liquid cooling.
  • Thermal system specifically, the box has a containing cavity containing a battery module, the bottom of the containing cavity has a first cavity, and two opposite sides of the containing cavity are provided with a second cavity, a second cavity Communicating with the first chamber, the first chamber and the second chamber are filled with phase change media, and a cooling channel is also provided on the outside of the second chamber, and a cooling liquid flows in the cooling channel; wherein, the first chamber is In the evaporation section, the second chamber is a condensing section, and at least a part of the wall forming the second chamber is heat-exchanged with the wall forming the cooling channel; in this way, the battery module is placed behind the accommodating chamber of the box, the first The chamber is located at the bottom of the battery module, and the second chamber
  • the heat generated by the battery module is transferred to the first chamber through thermal conduction.
  • the phase change medium in the first chamber absorbs heat and heats up and vaporizes.
  • the vaporized phase change medium will flow to the second chamber on both sides, and the second chamber exchanges heat with the cooling channel, so that the gaseous phase change medium in the second chamber undergoes a liquefaction process, and the liquid phase change medium flows back.
  • this cycle achieves the purpose of heat dissipation of the battery module.
  • this device based on the heat of the battery pack heat exchanges with the battery module through the phase change medium, and then exchanges heat with the cooling liquid in the cooling channel to finally achieve the cooling of the battery module.
  • a cooling medium with a lower viscosity can be used to increase the flow rate, thereby improving the heat exchange efficiency, and avoiding the structure of the closed flow channel inside the battery module, which makes the structure of the entire device simple.
  • the related structure of the cooling liquid can be located on the outside of the entire device, which avoids the hidden safety hazards caused by problems such as liquid leakage.
  • each of the second chambers communicates with the first chamber through a transition chamber, and the first chamber is an insulating section.
  • a device based on the thermal design of the battery pack as described above further includes a heat exchange plate member disposed in the box body, the heat exchange plate member including a bottom plate portion and side plate portions provided on both sides of the bottom plate portion
  • the first chamber is formed in the bottom plate portion, and the transition chamber and the second chamber are both formed in the side plate portion.
  • a device based on the thermal design of a battery pack includes a plurality of heat exchange plates.
  • the side plate portion includes an upper plate section and a lower plate section located inside the upper plate section, the upper plate section and the lower side
  • the plate segments are connected by side plate connecting segments; the upper side plate segments are not in contact with the battery module;
  • the transition chamber is formed in the lower plate section, and the second chamber is formed in the upper plate section and the side plate connection section;
  • the side plate portion includes an upper side plate section and a lower side plate section located below the upper side plate section, the side plate section is a linear structure; the upper side plate section and the battery module are not contact;
  • the transition chamber is formed in the lower plate section, and the second chamber is formed in the upper plate section.
  • the heat exchange plate is an integrated hollow structure, and the inner cavity forms the first cavity, the second cavity and the transition cavity.
  • the upper plate section is attached to the wall portion forming the cooling channel to facilitate heat exchange.
  • a thermally conductive glue is applied between the upper plate section and the wall forming the cooling channel.
  • a device based on the thermal design of the battery pack as described above further includes a heat pipe, the heat pipe includes a bottom pipe section at the bottom of the accommodating chamber portion and side pipe sections at two opposite sides of the accommodating chamber portion, so The lumen of the bottom tube section forms the first chamber, and the lumen of the side tube section forms the second chamber.
  • the side tube segment is connected to the bottom tube segment through a side transition tube segment, a lumen of the side transition tube segment forms a transition chamber, and the second cavity
  • the chamber communicates with the first chamber through the transition chamber; the transition chamber is an adiabatic section.
  • a device based on the thermal design of a battery pack as described above further includes a heat conducting plate member disposed in the box body, and a plurality of the heat pipes are fixedly embedded on the heat conducting plate member.
  • the heat pipe protrudes from the inner and outer plate surfaces of the heat conducting plate, so that the wall of the bottom pipe section of the heat pipe can The bottom surface of the battery module is in contact fit, and the tube wall of the side tube section of the heat pipe can be in contact fit with the wall portion forming the cooling channel.
  • a thermally conductive glue is applied between the wall of the side tube section and the wall forming the cooling channel.
  • the cooling channel includes two cooling chambers, and the two cooling chambers are respectively formed on two opposite side walls of the box.
  • the cooling channel further includes a cooling tube communicating with the two cooling chambers.
  • the cooling cavity extends from the first end of the side wall to the second end of the side wall, and the cooling channel further has a cooling liquid inlet and a cooling liquid
  • the outlet, the cooling liquid inlet and the cooling liquid outlet are respectively formed at the first ends of the two cooling chambers, and the second ends of the two cooling chambers communicate through the cooling pipe.
  • the cooling tube is located outside the end wall of the box close to the second end of the cooling cavity.
  • a device based on the thermal design of the battery pack as described above further includes a cover body, the cover body and the box body cooperate to form an enclosed space for accommodating the battery module; a wall forming the first chamber The part is in contact with the bottom surface of the battery module.
  • a device based on the thermal design of the battery pack is coated with a thermally conductive adhesive between the wall portion forming the first chamber and the bottom surface of the battery module.
  • a device based on the thermal design of the battery pack is provided with a heat insulating member between the wall forming the first chamber and the box.
  • FIG. 1 is an exploded view of a device based on the thermal design of a battery pack at an angle in a specific embodiment provided by the present invention
  • FIG. 2 is an exploded view of a device based on the thermal design of a battery pack at another angle in a specific embodiment provided by the present invention
  • FIG. 3 is a schematic diagram of cooperation between a battery module and a heat exchange plate in a specific embodiment provided by the present invention
  • FIG. 4 is a schematic diagram of cooperation between a heat exchange plate and a box in a specific embodiment provided by the present invention.
  • FIG. 5 is a schematic diagram of the heat dissipation principle of a device based on the thermal design of a battery pack provided by the present invention
  • FIG. 6 is an exploded view of a device based on the thermal design of a battery pack in another specific embodiment provided by the present invention.
  • FIG. 7 is a schematic diagram of cooperation between the battery module and the heat exchange plate in the embodiment shown in FIG. 6;
  • FIG. 8 is a schematic diagram of the cooperation between the heat exchange plate and the box in the embodiment shown in FIG. 6.
  • Box 100 accommodating cavity portion 100a, side wall 110, cooling cavity 1101, lower wall portion 111, middle wall portion 112, upper wall portion 113, first end wall 120, second end wall 130, first cooling fluid take-over 140 , The second coolant takes over 150, the cooling tube 160;
  • Heat exchange plate 200 bottom plate portion 210, first chamber 210a, side plate portion 220, second chamber 220a, transition chamber 220b, upper plate section 221, lower plate section 222, side plate connection section 223;
  • Heat exchange plate 200' bottom plate portion 210', side plate portion 220', upper plate section 221', lower plate section 222';
  • the battery module 500, the battery cell 510, and the tightening member 520 are identical to each other.
  • FIG. 1 is an exploded view of a device based on the thermal design of a battery pack at an angle in a specific embodiment provided by the present invention
  • FIG. 2 is a battery pack based on a battery pack in a specific embodiment provided by the present invention Exploded view of a thermally designed device at another angle
  • FIG. 3 is a schematic diagram of cooperation between a battery module and a heat exchange plate in a specific embodiment provided by the invention
  • FIG. 4 is a heat exchange in a specific embodiment provided by the invention Schematic diagram of the cooperation between the board and the box
  • FIG. 5 is a schematic diagram of the heat dissipation principle of a device based on the thermal design of the battery pack provided by the present invention.
  • a device based on the thermal design of a battery pack includes a battery module 500 and a heat dissipation structure, wherein the battery module 500 is usually arranged by a plurality of battery cells 510 to form a module body with a square body structure, adjacent The battery cells 510 are relatively fixed, and the fixing method may use conventional bonding and other forms; in order to ensure the connection stability between the battery cells 510, the battery module 500 further includes a tightening member 520, and the tightening member 520 wraps around the module body The periphery of the module fastens the module body. As shown in FIGS. 1 and 2, the tightening member 520 is equivalent to the outer shell of the module body, and is usually located in the middle of the module body.
  • the heat dissipation structure of the device includes an open box 100 having a receiving cavity 100a for receiving the battery module 500.
  • the box body 100 is enclosed by a bottom wall, two side walls 110, and two end walls to form an open structure with a receiving cavity portion 100a, which is convenient for placing the battery module 500 in the box body 100 during assembly.
  • the bottom of the accommodating cavity 100a is provided with a first cavity 210a
  • the two opposite sides of the accommodating cavity 100a are provided with second cavities 220a
  • the two ends of the first cavity 210a are respectively connected with the two second cavities 220a communicates
  • the first chamber 210a and the two second chambers 220a are filled with the phase change medium 300; it can be understood that since the first chamber 210a communicates with the two second chambers 220a, the phase change medium 300 can It flows in the space formed by the first chamber 210a and the two second chambers 220a.
  • the first chamber 210a is an evaporation section
  • the second chamber 220a is a condensation section, that is, the phase change medium in the first chamber 210a can absorb heat to evaporate, and the phase change medium in the second chamber 220a It can release heat to condense; it can be understood that both the wall portion forming the first chamber 210a and the wall portion forming the second chamber 220a are made of a thermally conductive material.
  • the box 100 is further provided with a cooling channel through which a cooling liquid circulates, the cooling channel is located outside the second chamber 220a, and at least a portion of the wall forming the second chamber 220a is heat-exchanged with the wall forming the cooling channel; In this way, the phase change medium in the second chamber 220a can exchange heat with the cooling liquid in the cooling channel.
  • the side relatively close to the accommodating cavity portion 100a is defined as inside, and the side relatively away from the accommodating cavity portion 100a is defined as outside.
  • the orientation words related to inside and outside are the same as this reference, and will not be repeated here.
  • the first chamber 210a is located at the bottom of the battery module 500, and the second chamber 220a is located at the side of the battery module 500, it can be understood that The second chamber 220a is located between the battery module 500 and the cooling channel.
  • the heat generated by the battery module 500 can be transferred to the first chamber 210a at the bottom thereof.
  • the phase change medium in the first chamber 210a absorbs heat and heats up and vaporizes.
  • the vaporized phase change medium will go to both sides
  • the second chamber 220a flows, and the second chamber 220a exchanges heat with the cooling channel, so that the gaseous phase change medium in the second chamber 220a undergoes a liquefaction process, and the liquid phase change medium flows back to the first chamber 210a. In this way, the purpose of heat dissipation of the battery module 500 is achieved.
  • the second chamber 220a is a condensing section, heat needs to be released to the outside. It can be understood that there is no heat exchange between the second chamber 220a and the battery module 500.
  • the second chamber 220a is specifically communicated with the first chamber 210a through the transition chamber 220b, wherein the transition chamber 220b is an insulating section, specifically, the wall material forming the second chamber 220b may be made of an insulating material Or, the wall forming the transition chamber 220b may be covered with an insulating jacket, etc.; after this arrangement, the flow direction of the phase change medium is clearer, and the heat exchange effect can be improved.
  • the heat dissipation structure further includes a heat exchange plate 200 that is placed in the accommodating cavity portion 100a of the cabinet 100.
  • the heat exchange plate 200 includes a bottom plate portion 210 and sides provided on both sides of the bottom plate portion 210
  • the plate portion 220 wherein the bottom plate portion 210 has a first chamber 210a, and the side plate portion 220 has a transition chamber 220b and a second chamber 220a, it can be understood that the heat exchange plate 200 has an approximately U-shaped structure, and can also It is understood that the transition chamber 220b is located below the second chamber 220a.
  • a plurality of heat exchange plates 200 are provided, so that the flow of the phase change medium 300 in the heat exchange plates 200 is facilitated, and the heat dissipation efficiency is improved.
  • only one heat exchange plate 200 matching the battery module 500 may be provided.
  • the heat exchange plate 200 is an integrated hollow structure, and its inner cavity is the space where the aforementioned first chamber 210a, second chamber 220a, and transition chamber 220b communicate; of course, the bottom plate portion of the heat exchange plate 200
  • the 210 and the side plate portion 220 can also be formed separately and then fixed together. Compared with this, the heat exchange plate 200 with an integrated structure can more ensure the tightness of the flow space of the phase change medium 300.
  • the cooling channel of the box 100 includes two cooling chambers 1101, and the two cooling chambers 1101 are respectively formed on the two side walls 110 of the box 100.
  • the side plate portion of the heat exchange plate 200 220 is in contact with the portion of the side wall 110 corresponding to the position of the cooling cavity 1101, and a plurality of heat exchange plates 200 are arranged in the box 100 along the extending direction of the side wall 110.
  • each heat exchange plate 200 can be placed in the box 100 before the battery module 500 is placed. It can be understood that the heat exchange plate 200 is located between the battery module 500 and the box 100.
  • the two cooling chambers 1101 of the cabinet 100 communicate with each other through a cooling tube 160, and the two cooling chambers 1101 and the cooling tube 160 form a cooling channel.
  • the cooling channel has a cooling liquid inlet and a cooling liquid outlet, which can be specifically connected
  • the pipeline is connected with the cooling liquid source, so that the cooling liquid circulates in the cooling channel.
  • the two cooling chambers 1101 may not be connected, and a cooling liquid inlet and an outlet are provided in each cooling chamber 1101, and the cooling liquids in the two cooling chambers 1101 are relatively independently controlled.
  • the bottom plate portion 210 of the heat exchange plate 200 is used to contact and cooperate with the bottom wall of the battery module 500 of the battery pack to achieve heat exchange, and the side plate portion 220 of the heat exchange plate 200 forms at least a portion of the wall of the second chamber 220a The portion is in contact with the cooling cavity 1101 on the corresponding side to achieve heat exchange. It can be understood that the side plate portion 220 specifically contacts the portion of the side wall 110 forming the cooling cavity 1101.
  • a heat conductive glue may be applied between the bottom plate portion 210 and the bottom wall of the battery module 500 to enhance heat exchange between the two.
  • the heat generated by the battery module 500 can be transferred to the bottom plate portion 210 of the heat exchange plate 200 through heat conduction.
  • the phase change medium in the heat exchange plate 200 is initially in a liquid state, as the battery module 500 The heat is transferred to the bottom plate portion 210 of the heat exchange plate 200.
  • the temperature of the bottom plate portion 210 rises.
  • the phase change medium in the bottom plate portion 210 will be converted from a liquid state to a gaseous state, that is, vaporization occurs;
  • the vaporization of the phase change medium absorbs the heat of the battery module 500 to achieve the purpose of cooling the battery module 500.
  • phase change medium in the bottom plate portion 210 of the heat exchange plate 200 After the phase change medium in the bottom plate portion 210 of the heat exchange plate 200 is converted into a gaseous state, the gaseous phase change medium will flow upward, that is, in the direction of the side plate portions 220 on both sides, and along the space inside the side plate portion 220 Ascending, the arrow in the cavity of the heat exchange plate 200 in FIG.
  • the inside of the side plate portion 220 The gaseous phase change medium can exchange heat with the cooling fluid flowing in the cooling cavity 1101, that is, the gaseous phase change medium can transfer heat to the cooling liquid, and the cooling liquid absorbs the heat of the gaseous phase change medium, thereby reducing the side plate
  • the temperature of the portion 220 causes the gaseous phase change medium to undergo a liquefaction process, and the liquid phase change medium flows back to the bottom plate portion 210 of the heat exchange plate 200.
  • this device based on the thermal design of the battery pack performs heat exchange with the battery module 500 through the phase change medium, and then performs heat exchange with the cooling liquid to finally achieve the cooling of the battery module 500.
  • the heat dissipation structure of the device combines phase change medium cooling and liquid cooling. Among them, the related parts of liquid cooling are far from the battery module 500 and are located on the outside of the entire device. There is no need to insulate the cooling liquid, and there is no restriction on the cooling liquid.
  • the coolant medium with lower viscosity can be selected to increase the flow rate, thereby improving the heat exchange, and accordingly, the structure of the closed flow channel and the like inside the battery module 500 is avoided, which makes the structure of the whole device simple and more convenient Integration, at the same time, the liquid cooling related structure is located on the outside of the entire device, which also avoids hidden safety hazards caused by problems such as liquid leakage.
  • a plurality of heat exchange plates 200 are arranged at intervals along the extending direction of the side wall 110.
  • the plurality of heat exchange plates 200 is also equivalent to The battery modules 500 are arranged at intervals along the extending direction of the corresponding side of the battery module. Due to the structure of the heat exchange plate 200, it can also be understood that the heat exchange plate 200 is similarly engaged with the battery module 500, or that the battery module 500 Embedded in the U-shaped space of the heat exchange plate 200, the bottom plate portion 210 of the heat exchange plate 200 is in contact with the bottom wall of the battery module 500 to facilitate heat exchange.
  • the matching structure of the battery module 500 and the heat exchange plate 200 is shown in FIG.
  • the size and number of the heat exchange plate 200 are related to the heat dissipation requirements of the battery module 500, and specific applications can be determined according to actual needs The number of heat exchange plates 200 and related dimensions, including the distance between two adjacent heat exchange plates 200, etc., as long as they can meet the heat dissipation requirements of the battery module 500.
  • the cooling cavity 1101 extends from the first end of the side wall 110 to the second end of the side wall 110, that is, the cooling cavity 1101 runs through the entire length of the side wall 110, which can ensure that each heat exchange plate Both of the side plate portions 210 of 200 can exchange heat with the cooling liquid in the cooling cavity 1101.
  • the coolant inlet and the coolant outlet are respectively formed at the first ends of the two cooling chambers 1101, that is, the coolant inlet and the coolant outlet are located at the same end of the box 100, and the second ends of the two cooling chambers 1101 pass through The cooling pipe 160 communicates.
  • the coolant flows in from the coolant inlet at the first end of the first cooling cavity 1101, it flows along the first cooling cavity 1101 to its second end, and flows through the cooling tube 160 to the second of the second cooling cavity 1101 End, then flow along the second cooling chamber 1101 to its first end, and finally flow out through the cooling liquid outlet at the first end of the second cooling chamber 1101, so that the cooling liquid is cooled by the two cooling chambers 1101 and the cooling tube 160
  • the channel can be circulated to facilitate heat exchange with the gaseous phase change medium in the side plate 220.
  • the first coolant connector 140 is connected to the coolant port near the left end of the cooling chamber 1101, and the left coolant port is connected to the front side cooling chamber 1101
  • a second coolant connection 150 one of the first coolant connection 140 and the second coolant connection 150, one is used as a coolant inlet pipe, the other is used as a coolant outlet pipe, and the two are connected to a coolant source, Between the two, other necessary components such as pumps or valves, or other heat exchange components that cool the coolant can also be provided as needed.
  • the cooling tube 160 is located outside the end wall of the box 100 near the second end of the cooling chamber 1101; in the solution shown in FIG. 4, the end wall near the left side is the first end wall 120, and the end wall near the right side
  • the first cooling liquid connection 140 and the second cooling liquid connection 150 are disposed at the end of the first end wall 120, then, accordingly, the cooling tube 160 is located at the second end wall 130 Outside.
  • the cooling pipe 160 is located outside the box 100 and is separated from the battery module 500 in the box 100 to avoid the hidden safety hazards caused by the leakage of the cooling pipe 160 and improve the safety of the entire device.
  • the battery module 500 further includes a tightening member 520 for tightening the module body around the periphery of the module body.
  • a tightening member 520 for tightening the module body around the periphery of the module body.
  • FIGS. 1 and 2 such a battery module 500 has a tightening member A stepped structure will be formed between 520 and the side of the battery module 500; herein, for ease of understanding and explanation, the side of the battery module 500 refers specifically to the outer wall of the battery cell 510 located on the outer periphery.
  • the side plate portion 220 of the heat exchange plate 200 includes an upper plate section 221 and a lower plate section 222 located inside the upper plate section 221.
  • the upper plate section 221 and the lower plate section 222 pass through the side plate
  • the connection section 223 is connected; as shown in the figure, it can be understood that the upper side plate section 221, the lower side plate section 222 and the side plate connection section 223 form a stepped structure; specifically, the lower side plate section 222 may be connected to the battery module 500.
  • the sides are in contact, as mentioned above, the upper plate section 221 is a condensation section, so during installation, after the components are assembled, there is no contact between the upper plate section 221 and the battery module 500 to avoid heat between the two exchange. Since the lower plate section 222 is an insulating section, it can be placed in contact with the side of the battery module 500 or non-contact.
  • the transition chamber 220b is formed in the lower plate section 222, and the second chamber 220a is formed in the upper plate section 221 and the side plate connection section 223; obviously, the phase change medium and the cooling channel in the second chamber 220a are to be realized
  • the material of the upper side plate section 221 and the side plate connecting section 223 is a thermally conductive material, and the heat exchange between the phase change medium in the first chamber 210a and the battery module 500 should be realized to form the first chamber
  • the material of the bottom plate portion 210 of 210a is also a thermally conductive material.
  • the lower plate section 222 forming the transition chamber 220b is made of heat-insulating material or covered with heat-insulating material, so that the heat generated by the battery module 500 can only be transferred to the first chamber 210a through the bottom plate portion 210 Phase change medium without heat exchange with the phase change medium in the transition chamber 220b, the cooling chamber 1101 is formed in the middle position of the side wall 110 of the box 100, and the position is the same as the upper plate section 221 of the side plate portion 220 Fitting, that is to say, in actual installation, only the upper plate section 221 of the side plate portion 220 exchanges heat with the cooling cavity 1101. In this way, the heat transfer parts are more concentrated and the heat exchange efficiency is higher, which is more conducive to the temperature change and vaporization of the phase change medium in the first chamber 210a and then flows to the second chamber 220a through the transition chamber 220b.
  • the inner wall surface of the side wall 110 of the box body 100 may have a planar structure, and a central portion of the side wall 110 protrudes outward to form a tubular wall portion having a cooling cavity 1101, the tubular wall portion and the side plate portion 220
  • the side plate segments 221 are attached, the portion of the side wall 110 below the tubular wall portion forms a lower wall portion 111, the portion above the tubular wall portion forms an upper wall portion 113, and the tubular wall portion forms a middle wall portion of the side wall 110 112.
  • the lower plate section 222 is located inside the upper plate section 221. After the hot plate 200 and the box 100 are assembled, a cavity structure is formed between the lower plate section 222 and the side wall 110, which can be understood with reference to FIG. 5.
  • the side wall 110 of the box 100 may also be designed as a stepped structure matching the structure of the heat exchange plate 200 to provide support for the side plate connection section 223 of the heat exchange plate 200.
  • the side wall 110 includes a lower wall portion 111, a middle wall portion 112, and an upper wall portion 113 connected in this order from bottom to top; wherein, the middle wall portion 112 is a tubular wall portion having a cooling cavity 1101, and the lower wall portion 111 and the middle wall
  • the connection portion of the portion 112 is formed on the inner side of the side wall 110 to form an upward first step surface for supporting the side plate connection section 223, and the connection portion of the middle wall portion 112 and the upper wall portion 113 is formed on the inner side of the side wall 110
  • the second step surface so that the first step surface, the inner wall surface of the middle wall portion 112 and the second step surface form a groove portion facing the inner cavity of the lower case 100, and after the heat exchange plate 200 and the case 100 are assembled, the The upper plate section 221 of the side plate portion 220 is located in the groove portion and is bonded to the middle wall portion 112, so that a certain limit can be formed on the heat exchange plate 200.
  • the length of the upper side plate segment 221 may be slightly shorter than the length of the middle wall portion 112, or the second step surface may be set smaller.
  • the side wall 110 of the box 100 is formed regardless of the structure.
  • the tubular wall portion of the cooling cavity 1101 and the upper side plate section 221 are also coated with thermally conductive adhesive to strengthen the gap between the two. The heat exchange effect improves the heat dissipation efficiency of the battery module 500.
  • a corresponding limit structure may be provided in the box 100, for example, a matching limit protrusion is provided at a corresponding position on the bottom wall of the box 100, The bottom plate portion 210 of the heat exchange plate 200 is limited between two limiting protrusions.
  • the device based on the battery pack thermal design further includes a cover 400 that cooperates with the box 100 to form an enclosed space for accommodating the battery module 500.
  • a sealing ring may be provided between the cover 400 and the box 100 to ensure the tightness of the enclosed space.
  • the first cavity, the second cavity and the transition cavity filled with the phase change medium can be implemented in addition to the heat exchange plate 200 with an integrated hollow structure described above.
  • a heat pipe is provided in the box 100, and the heat pipe includes a bottom pipe section located at the bottom of the accommodating chamber portion 100a and side pipe sections located at two opposite sides of the accommodating chamber portion 100a, wherein the lumen of the bottom pipe section forms the first chamber
  • the lumen of the side pipe section forms a second chamber.
  • the first chamber is an evaporation section
  • the phase change medium in the first chamber can absorb heat to evaporate
  • the second chamber is a condensation section. Phase change media can release heat to condense.
  • the side pipe section of the heat pipe is connected to the bottom pipe section through the side transition pipe section, wherein the lumen of the side transition pipe section forms a transition chamber, that is, the second chamber passes through the transition chamber and the first chamber Connected, the transition chamber is adiabatic.
  • the battery module 500 usually has a certain size.
  • a plurality of heat pipes may be provided in the box 100, specifically, the plurality of heat pipes may be along a box provided with a cooling channel
  • the extending direction of the side walls of the body 100 is arranged, and the specific number of heat pipes and the distance between adjacent heat pipes can be set according to actual heat dissipation requirements.
  • the heat dissipation structure in order to improve the pressure-bearing capacity of the heat pipe and avoid damage to the heat pipe, may be provided with a heat conduction plate, and a plurality of heat pipes are fixedly embedded on the heat conduction plate.
  • all the heat pipes in the box 100 may be embedded on one heat-conducting plate, and of course, may be grouped and embedded on more than two heat-conducting plates.
  • the heat pipe protrudes from the inner and outer plate surfaces of the heat conductive plate; it can be understood that after assembly, the heat pipe is located between the battery module 500 and the box 100; here , The inner plate surface of the heat conduction plate is the plate surface facing the battery module 500, and the outer plate surface is the plate surface facing the box body 100; after this setting, the wall of the bottom pipe section of the heat pipe can be in contact with the bottom surface of the battery module 500 Cooperate to strengthen the heat exchange between the two.
  • the wall of the side pipe section of the heat pipe can be in contact with the wall forming the cooling channel, thereby enhancing the heat exchange between the two and improving the heat dissipation efficiency of the battery module 500.
  • the heat pipe can also be coated between the side pipe section of the heat pipe and the wall portion forming the cooling channel to improve the heat exchange efficiency between the two.
  • the heat exchange plate 200 may also be in other forms, which can be understood with reference to FIGS. 6 to 8, which is a device based on the thermal design of the battery pack in another specific embodiment provided by the present invention 7 is a schematic diagram of the cooperation between the battery module and the heat exchange plate in the embodiment shown in FIG. 6; FIG. 8 is a schematic diagram of the cooperation between the heat exchange plate and the box in the embodiment shown in FIG.
  • the specific structure of a device based on the thermal design of the battery pack is similar to the previous embodiment, except that the structure of the heat exchange plate is different.
  • the structure of the heat exchange plate is only described below, and other components can be Refer to the foregoing embodiment description.
  • the heat exchange plate 200' has a U-shaped structure, including a bottom plate portion 210' and side plate portions 220' provided on both sides of the bottom plate portion 210', wherein the side plate portion 220' is
  • the linear structure includes an upper plate section 221' and a lower plate section 222'. It can be understood that the upper plate section 221' and the lower plate section 222' are directly connected, and the two have a straight plate structure.
  • the heat exchange plate 200' is also an integrated hollow structure, the inner cavity of the bottom plate portion 210' forms a first chamber, the inner cavity of the upper plate section 221' forms a second chamber, and the lower plate section The inner cavity of 222' forms a transition chamber, and the inner cavity of the heat exchange plate 200' is filled with a phase change medium.
  • the bottom plate section 210' is an evaporation section, which is heat-exchanged with the bottom surface of the battery module 500;
  • the upper plate section 221' is a condensation section, which is heat-exchanged with the cooling chamber 1101 of the cabinet 100;
  • the lower plate section 222 'It is adiabatic section.
  • the bottom surface of the battery module 500 is in contact with the bottom plate portion 210' of the heat exchange plate 200' to achieve heat exchange.
  • the upper plate section 221' of the heat exchange plate 200' and the cooling cavity 1101 form The walls are in contact with each other to achieve heat exchange.
  • a heat conductive glue may be applied between the bottom plate portion 210' and the bottom surface of the battery module 500 to enhance heat exchange; a heat conductive glue may also be applied between the upper plate section 221' and the wall portion forming the cooling cavity 1101, To enhance heat transfer.
  • the size design of the heat exchange plate 200' should be such that after assembly, the upper plate section 221' does not contact the battery module 500.
  • a heat insulating member may be provided between the wall forming the first chamber 210a and the box 100 to prevent the temperature of the box 100 from affecting the phase change medium in the first chamber; the heat insulating member may be A thermally conductive member with a low thermal conductivity to minimize the heat conduction between the box 100 and the wall forming the first chamber 210a.
  • the heat insulating member is preferably an insulating member to avoid the box 100 and the formation Heat is conducted between the walls of the first chamber 210a.
  • heat insulation parts can be set according to application requirements.

Landscapes

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

Abstract

L'invention concerne un dispositif utilisant une conception thermique d'un bloc-batterie. Le dispositif comprend un boîtier (100) ayant une ouverture. Le boîtier (100) comprend une cavité de réception (100a) accueillant un module de batterie (500). Une première chambre (210a) est disposée au fond de la cavité de réception (100a). Des secondes chambres (220a) sont disposées au niveau de deux parties latérales opposées de la cavité de réception (100a). La première chambre (210a) est reliée aux deux secondes chambres (220a). Des milieux à changement de phase (300) sont disposés dans la première chambre (210a) et les deux secondes chambres (220a). Des canaux de refroidissement dans lesquels s'écoule un agent de refroidissement sont également fournis au niveau du boîtier (100). Les canaux de refroidissement sont situés à l'extérieur des secondes chambres (220a). Au moins des parties de portions de paroi des secondes chambres (220a) sont couplées à des portions de paroi des canaux de refroidissement pour mettre en œuvre un échange de chaleur. La première chambre (210a) est une section d'évaporation. Les secondes chambres (220a) sont des sections de condensation. Le dispositif utilise un système à deux échangeurs de chaleur combinant un refroidissement liquide et un changement de phase, augmente l'efficacité de dissipation de chaleur d'un module de batterie, et régule efficacement la différence de température entre des éléments de batterie individuelles dans le module de batterie. Le dispositif est également hautement sure pour utilisation et est de structure simple.
PCT/CN2018/120501 2018-12-12 2018-12-12 Dispositif utilisant une conception thermique d'un bloc-batterie WO2020118548A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/120501 WO2020118548A1 (fr) 2018-12-12 2018-12-12 Dispositif utilisant une conception thermique d'un bloc-batterie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/120501 WO2020118548A1 (fr) 2018-12-12 2018-12-12 Dispositif utilisant une conception thermique d'un bloc-batterie

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102157761A (zh) * 2011-03-18 2011-08-17 华南理工大学 一种基于脉动热管的动力电池热管理***
CN104538700A (zh) * 2015-01-12 2015-04-22 华南理工大学 一种车用动力电池内插扁平微热管散热装置及其散热方法
US20160104925A1 (en) * 2013-04-23 2016-04-14 Xiaodong Xiang A cooling mechanism for batteries using l-v phase change materials
CN105552476A (zh) * 2016-03-07 2016-05-04 宁德时代新能源科技股份有限公司 电池包热管理***
CN105633509A (zh) * 2016-03-17 2016-06-01 华南理工大学 一种动力电池复合热管理***及其方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102157761A (zh) * 2011-03-18 2011-08-17 华南理工大学 一种基于脉动热管的动力电池热管理***
US20160104925A1 (en) * 2013-04-23 2016-04-14 Xiaodong Xiang A cooling mechanism for batteries using l-v phase change materials
CN104538700A (zh) * 2015-01-12 2015-04-22 华南理工大学 一种车用动力电池内插扁平微热管散热装置及其散热方法
CN105552476A (zh) * 2016-03-07 2016-05-04 宁德时代新能源科技股份有限公司 电池包热管理***
CN105633509A (zh) * 2016-03-17 2016-06-01 华南理工大学 一种动力电池复合热管理***及其方法

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