WO2024259751A1 - 一种电池包 - Google Patents

一种电池包 Download PDF

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Publication number
WO2024259751A1
WO2024259751A1 PCT/CN2023/106520 CN2023106520W WO2024259751A1 WO 2024259751 A1 WO2024259751 A1 WO 2024259751A1 CN 2023106520 W CN2023106520 W CN 2023106520W WO 2024259751 A1 WO2024259751 A1 WO 2024259751A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
pressure relief
battery pack
cell group
battery
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.)
Ceased
Application number
PCT/CN2023/106520
Other languages
English (en)
French (fr)
Inventor
周红权
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.)
Eve Energy Co Ltd
Original Assignee
Eve Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202310730179.5A external-priority patent/CN116826270A/zh
Priority claimed from CN202321571433.3U external-priority patent/CN220042068U/zh
Application filed by Eve Energy Co Ltd filed Critical Eve Energy Co Ltd
Publication of WO2024259751A1 publication Critical patent/WO2024259751A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—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
    • H01M10/6567—Liquids
    • 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery pack.
  • the CTP grouping technology of the battery pack meets the market demand for high specific energy and low cost.
  • CTP technology has developed to CTP3.0, the system design is complex, the cost is high, the system grouping is difficult and the efficiency is low.
  • the cell group needs to have higher structural strength to meet the module-free requirements.
  • a separate structure is used to fix the cell group, which complicates the structure of the CTP battery pack.
  • the present application provides a battery pack that can increase the structural strength of the system and achieve thermal and electrical separation.
  • a battery pack includes a case; a plurality of battery cell groups, each of the battery cell groups including a plurality of battery cells; a pressure relief assembly connected to the case and opposite to an explosion-proof valve of the battery cell, the pressure relief assembly pressing against a first side of the battery cell group; a liquid cooling plate connected to the case and pressing against a second side of the battery cell group, the second side being opposite to the first side, the liquid cooling plate being provided with a support member, the support member being located at a junction of two adjacent battery cell groups, and one side of the support member supporting the second side of one of the two adjacent battery cell groups, and the other side of the support member supporting the second side of the other of the two adjacent battery cell groups.
  • a support is provided on the liquid cooling plate to support two adjacent battery cell groups at the same time, thereby preventing the liquid cooling plate from being deformed by the battery cell groups.
  • a pressure relief component is pressed against the first side of the battery cell group, and the pressure relief component is opposite to the explosion-proof valve of the battery cell.
  • the pressure relief component is used to directionally clear the eruption material ejected from the explosion-proof valve, and the pressure relief component is pressed against the battery cell group to prevent the battery cell group from being affected by the cyclic expansion force and causing the battery cell group to rise, so that the pressure relief component as the pressure relief channel of the battery cell and the liquid cooling plate as the cold source of the battery cell form a fixed structure of the module-free battery pack, thereby realizing the combination of the pressure relief component, the liquid cooling plate and the mechanical structure of the box body, optimizing the structure of the module-free battery pack, simplifying the process, and enhancing the rigidity of the system.
  • the pressure relief pipe is provided with a plurality of weak portions, and the weak portions are arranged opposite to the explosion-proof valve.
  • a trigger channel is formed between the pressure relief pipe and the explosion-proof valve, and a trigger gasket is installed in the trigger channel.
  • the trigger gasket is made of a high temperature resistant insulating material.
  • a side portion of the pressure relief pipe extends toward the battery cell group to form a pressing edge abutting against the battery cell group.
  • adjacent battery cells are bonded together via structural members.
  • a cooling cavity for accommodating a refrigerant is provided inside the liquid cooling plate.
  • the support member is disposed in the cooling cavity.
  • a void-avoiding recess is provided on the liquid cooling plate, and the support member is embedded in the void-avoiding recess.
  • the side wall of the box body extends toward the second side of the battery cell group to form a bearing portion, and the bearing portion and the support member respectively support different positions of the second side of the battery cell group.
  • it further includes a bracket arranged on the outside of the battery cell group, an end of the bracket is fixedly connected to the side wall of the box body, and the pressure relief assembly is fixedly connected to the bracket.
  • a base is fixedly connected between the pressure relief assembly and the bracket.
  • a bottom guard plate is provided on one side of the box body close to the second side, and the liquid cooling plate is provided between the bottom guard plate and the battery cell group.
  • a side of the bottom guard plate close to the second side is fixedly connected to a side of the liquid cooling plate away from the second side.
  • the battery pack provided by this application has the following technical effects:
  • the pressure relief component is used to directionally clear the ejected material ejected from the explosion-proof valve, and the pressure relief component is pressed against the battery cell group to prevent the battery cell group from being affected by the cyclic expansion force and causing the battery cell group to rise, so that the pressure relief component as the pressure relief channel of the battery cell and the liquid cooling plate as the cold source of the battery cell form a fixed structure of the module-free battery pack, so as to realize the combination of the pressure relief component, the liquid cooling plate and the mechanical structure of the box body, optimize the structure of the module-free battery pack, simplify the process, and enhance the rigidity of the system;
  • a trigger channel is formed between the pressure relief pipe and the explosion-proof valve of the battery cell, and a trigger gasket is installed in the trigger channel, so that when the explosion-proof valve of the battery cell erupts, the position of the trigger gasket corresponding to the explosion-proof valve is broken by the eruption material, and then the eruption material passes through the trigger gasket and enters the pressure relief pipe, and the trigger gaskets at other positions are not affected, and the rest of the trigger channel is continuously closed to prevent the eruption material of the explosion-proof valve of the battery cell from splashing onto the surrounding battery cells, or the eruption material in the pressure relief pipe from flowing back onto the explosion-proof valve of the surrounding battery cells, thereby avoiding the surrounding battery cells from being affected;
  • a pressure edge is formed by extending the side of the pressure relief pipe toward the battery cell group to press the battery cell group and improve the rigidity of the pressure relief pipe and the system to avoid direct contact between the battery cell group and the pressure relief pipe when the battery cell group erupts, thereby buffering the force between the battery cell group and the pressure relief pipe.
  • the pressure edge can effectively block the eruption material from overflowing from the side of the battery cell group to avoid the eruption material from the battery cell group affecting the surrounding battery cell groups.
  • the extended pressure edge creates a gap between the pressure relief pipe and the explosion-proof valve, thereby forming a trigger channel, fully optimizing the structure of the module-free battery pack.
  • FIG1 is a schematic diagram of the structure of a battery pack according to an embodiment of the present application.
  • FIG2 is another schematic diagram of the structure of the battery pack according to the embodiment of the present application.
  • FIG3 is an enlarged schematic diagram of the E region in FIG2 ;
  • FIG4 is another schematic structural diagram of a battery pack according to an embodiment of the present application.
  • FIG5 is an enlarged schematic diagram of area A in FIG4 ;
  • FIG6 is an enlarged schematic diagram of area B in FIG4 ;
  • FIG. 7 is an enlarged schematic diagram of region C in FIG. 4 .
  • the first side 34 refers to the top of the battery cell group 3 in the vertical direction
  • the second side 35 refers to the bottom of the battery cell group 3 in the vertical direction
  • a battery pack includes a case 1, a pressure relief assembly 2, a liquid cooling plate 4 and a plurality of battery cell groups 3.
  • the battery cell group 3 includes a plurality of battery cells 32; the pressure relief assembly 2 is connected to the case 1 and is opposite to the explosion-proof valve 31 of the battery cell 32, and the pressure relief assembly 2 presses against the first side 34 of the battery cell group 3; the liquid cooling plate 4 is connected to the case 1 and abuts against the second side 35 of the battery cell group 3, and the second side 35 is opposite to the first side 34.
  • the liquid cooling plate 4 is provided with a support member 42, and the support member 42 is located at the junction of two adjacent battery cell groups 3, and one side of the support member 42 supports the second side 35 of one of the two adjacent battery cell groups 3, and the other side of the support member 42 supports the second side 35 of the other of the two adjacent battery cell groups 3.
  • a support member 42 is provided on the liquid cooling plate 4 to support two adjacent battery cell groups 3 at the same time, so as to prevent the liquid cooling plate 4 from being deformed by the battery cell group 3.
  • the first side 34 of the battery cell group 3 is pressed by a pressure relief component 2, and the pressure relief component 2 is opposite to the explosion-proof valve 31 of the battery cell 32.
  • the pressure relief component 2 is used to directionally clear the eruption material ejected from the explosion-proof valve 31, and the pressure relief component 2 is pressed against the battery cell group 3 to prevent the battery cell group 3 from being affected by the cyclic expansion force and causing the battery cell group 3 to rise, so that the pressure relief component 2 serving as the pressure relief channel of the battery cell 32 and the liquid cooling plate 4 serving as the cold source of the battery cell 32 form a fixed structure of a module-free battery pack, thereby combining the pressure relief component 2, the liquid cooling plate 4 and the mechanical structure of the box 1, optimizing the battery pack structure, simplifying the process, and enhancing the system rigidity.
  • At least one of the battery cell groups 3 is arranged below the pressure relief assembly 2 along the length direction of the pressure relief assembly 2, and the pressure relief assembly 2 is pressed against the first side 34 of the battery cell group 3 to press the battery cell 32 against the liquid cooling plate 4 to prevent the battery cell 32 from moving upward.
  • it also includes a bracket 13 arranged on the outside of the battery cell group 3, and the end of the bracket 13 is fixedly connected to the side wall 14 of the box body 1, and the pressure relief assembly 2 is fixedly connected to the bracket 13.
  • a base 15 is fixedly connected between the pressure relief component 2 and the bracket 13; specifically, the connection method adopted by the fixed connection can be welding or bolt connection; in one embodiment, the end of the bracket 13 is connected to the side wall 14 of the box body 1 by bolts, the base 15 is connected to the bracket 13 by bolts, and the pressure relief component 2 is connected to the base 15 by bolts; in one embodiment, the bracket 13 and the base 15 can be integrally formed, the pressure relief component 2 is connected to the base 15 by bolts, and the end of the bracket 13 is connected to the side wall 14 of the box body 1 by bolts, so that the pressure relief component 2 is connected to the box body 1 , can serve as a reinforcement structure of the box body 1 to improve the strength of the box body 1; at the same time, the pressure relief component 2 is opposite to the explosion-proof valve 31 of the battery cell 32, and the ejection material ejected from the explosion-proof valve 31 is directional dredged to achieve thermal and electrical separation, and can prevent the battery cell group 3 from being affected by the
  • the plurality of battery cell groups 3 can be arranged along the length direction or the width direction of the box body 1, and the first side 34 of each battery cell group 3 is pressed against a pressure relief component 2, and the pressure relief component 2 is opposite to the explosion-proof valve 31 of the battery cell 32, and the ejection material ejected from the explosion-proof valve 31 is directional dredged to solve the thermal safety pressure relief of the system.
  • the battery cell 32 is pressed against the liquid cooling plate 4 by the pressure relief component 2 to prevent the battery cell 32 from moving upward, so that the liquid cooling plate 4 can contact with the battery cell 32 for effective cooling, and the pressure relief components 2 arranged on the plurality of battery cell groups 3 are combined as the reinforcement structure of the box body 1 to improve the strength of the box body 1 and realize the pressure relief.
  • the component 2 is combined with the mechanical structure of the box 1 to solve the problem of thermal safety pressure relief of the system while optimizing the system structure and improving the system rigidity, which can reduce costs, simplify processes, and improve yield and efficiency.
  • a fixed structure of the battery pack in the vertical direction is formed by the pressure relief component 2 pressed against the first side 34 of the battery cell group 3 and the liquid cooling plate 4 pressed against the second side 35 of the battery cell group 3, and a support member 42 is provided on the liquid cooling plate 4 to support two adjacent battery cell groups 3 at the same time to prevent the liquid cooling plate 4 from being compressed and deformed, thereby realizing the combination of the pressure relief component 2, the liquid cooling plate 4 and the mechanical structure of the box 1, optimizing the structure of the module-free battery pack, simplifying the process, and enhancing the system rigidity.
  • the pressure relief assembly 2 includes a pressure relief pipe 21, and the explosion-proof valve 31 of the battery cell 32 is arranged opposite to the pressure relief pipe 21, so that the high-temperature and high-pressure eruption material ejected from the explosion-proof valve 31 of the battery cell 32 enters the pressure relief pipe 21 and is directionally cleared along the pressure relief pipe 21 to prevent the high-temperature and high-pressure eruption material from splashing onto surrounding components or the battery cell 32, causing damage to the surrounding components or the battery cell 32.
  • the pressure relief pipe 21 is provided with a plurality of weak portions 22, and the weak portions 22 are arranged opposite to the explosion-proof valve 31.
  • the explosion-proof valve 31 of the battery cell 32 is correspondingly arranged below the weak portion 22 of the pressure relief pipe 21, so that the high-temperature and high-pressure gas released when the explosion-proof valve 31 of the battery cell 32 is opened directly enters the pressure relief pipe 21 through the weak portion 22 opposite thereto, while the weak portions 22 at other positions of the pressure relief pipe 21 remain closed, which can effectively prevent the eruption material in the pressure relief pipe 21 from flowing back to the explosion-proof valve 31 of the surrounding battery cells 32.
  • the weak portion 22 is sealed and connected to the explosion-proof valve 31 to prevent the high-temperature and high-pressure eruption material ejected when the explosion-proof valve 31 is opened from overflowing and splashing onto surrounding components or the battery cell 32, causing The surrounding parts or the battery cell 32 are damaged; further, the battery cell 32 may be provided with a corresponding groove corresponding to the pressure relief pipe 21, and the pressure relief pipe 21 is snapped into the groove to form a stronger connection between the pressure relief pipe 21 and the battery cell 32, and at the same time, the weak part 22 of the pressure relief pipe 21 is tightly attached to the explosion-proof valve 31 of the battery cell group 3 or is sealed with the explosion-proof valve 31 of the battery cell 32 through a guide member such as a conduit, so as to avoid the overflow of high-temperature and high-pressure gas ejected when the explosion-proof valve 31 is opened, and can effectively guide the high-temperature and high-pressure eruption ejected when the explosion-proof valve 31 is opened into the pressure relief pipe 21, and carry out directional dre
  • the liquid cooling plate 4 and the pressure relief pipe 21 are used to form a fixed structure in the vertical direction to limit and fix the battery cell group 3, and the multiple battery cells 32 are arranged along the length direction of the pressure relief pipe 21 and pressed against the bottom of the pressure relief pipe 21.
  • the explosion-proof valve 31 of a certain battery cell 32 opens to eject high-temperature and high-pressure ejecta, the ejecta may contain substances such as the electrolyte of the battery cell 32.
  • each pressure relief pipe 21 is simultaneously connected to the explosion-proof valves 31 of multiple battery cells 32, after the ejecta enters the pressure relief pipe 21, it can flow along the pressure relief pipe 21 and flow back to the explosion-proof valves 31 of other battery cells 32, causing the explosion-proof valves 31 of other battery cells 32 to be contaminated or open due to high temperature, resulting in a chain effect. Therefore, referring to Figures 3 and 6, in some embodiments, a trigger channel 23 is provided between the pressure relief pipe 21 and the explosion-proof valve 31, and a trigger gasket 24 is installed in the trigger channel 23.
  • the battery cell group 3 and the pressure relief pipe 21 pressed against the first side 34 of the battery cell group 3 form a trigger channel 23, and the trigger gasket 24 is assembled in the trigger channel 23.
  • the explosion-proof valve 31 of the battery cell 32 erupts, the position of the trigger gasket 24 corresponding to the explosion-proof valve 31 is broken by the eruption material, and then the eruption material passes through the trigger gasket 24 and the weak portion 22 of the pressure relief pipe 21 in sequence and enters the pressure relief pipe 21.
  • the trigger gaskets 24 at other positions are not affected, and continue to close the rest of the trigger channel 23 to prevent the eruption material erupted from the explosion-proof valve 31 of the battery cell 32 from splashing onto the surrounding battery cells 32, or the eruption material in the pressure relief pipe 21 flows back to the explosion-proof valve 31 of the surrounding battery cells 32, thereby preventing the surrounding battery cells 32 from being affected.
  • the trigger gasket 24 is made of a high temperature resistant insulating material to prevent the trigger gasket 24 from being melted by the high temperature eruption material, and can effectively prevent the high temperature eruption material from flowing back to the explosion-proof valve 31 of other battery cells 32.
  • the trigger gasket 24 is preferably mica paper.
  • the mica paper is assembled in the trigger channel 23 between the pressure relief pipe 21 and the explosion-proof valve 31, so that the trigger channel 23 is in a closed state, that is, at this time, the explosion-proof valve 31 of the adjacent battery cell 32 is blocked and closed by the mica paper, and the pressure relief pipe 21 and the explosion-proof valve 31 are also blocked and closed by their own weak parts 22 and mica paper, and the eruption material of the explosion-proof valve 31 of the adjacent battery cell 32 cannot be splashed to the surrounding battery cells 32, and the eruption material flowing in the pressure relief pipe 21 cannot pass through the trigger channel 23 provided with mica paper, thereby preventing the eruption material from flowing back to the explosion-proof valve 31 of the surrounding battery cells 32.
  • the eruption material can only continue to flow along the pressure relief pipe 21 and cannot flow back to the surrounding explosion-proof valves 31, thereby effectively protecting the surrounding battery cell groups 3 from being affected.
  • the side of the pressure relief pipe 21 extends toward the battery cell group 3 to form a pressure edge 25 that abuts against the battery cell group 3.
  • both sides of the pressure relief pipe 21 extend toward the battery cell group 3 to form a pressure edge 25, and the pressure edge 25 abuts against the battery cell group 3 to abut against the battery cell group 3, and improve the rigidity of the pressure relief pipe 21 and the system to avoid direct abutment between the battery cell group 3 and the pressure relief pipe 21 when the battery cell group 3 erupts, buffering the force between the battery cell group 3 and the pressure relief pipe 21, and at the same time, the pressure edge 25 can effectively prevent the eruption from overflowing from the side of the battery cell group 3, avoiding the eruption from the battery cell group 3 affecting the surrounding battery cell groups 3, and the extended pressure edge 25 makes a gap between the pressure relief pipe 21 and the explosion-proof valve 31, thereby forming a trigger channel 23, fully optimizing the structure of the module-free battery pack.
  • a cooling cavity 41 for accommodating a refrigerant is provided inside the liquid cooling plate 4.
  • a hollow cooling cavity 41 is provided inside the liquid cooling plate 4 for accommodating a refrigerant to cool down the battery cell group 3 disposed above the liquid cooling plate 4.
  • the cooling cavity 41 may be provided with an inlet and outlet for the inlet and outlet of the refrigerant.
  • the refrigerant in the cooling cavity 41 is replaced through the inlet and outlet of the cooling cavity 41 to ensure the cooling effect of the liquid cooling plate 4.
  • the liquid cooling plate 4 is provided with a cooling cavity 41 for accommodating the refrigerant, the bearing capacity of the liquid cooling plate 4 is weak, and under the long-term heavy pressure of the power module, the liquid cooling plate 4 is prone to deformation, especially the middle area of the liquid cooling plate 4, which is very prone to sinking downward, destroying the original layout of the power module and seriously affecting the stability of the overall structure of the system. Therefore, a support member 42 is provided in the cooling cavity 41 to support the battery group 3.
  • the support member 42 can be a grid-like structure, which can support the battery group 3 without affecting the flow of the refrigerant in the cooling cavity 41.
  • the support member 42 can also enclose a cooling channel in the cooling cavity 41 of the liquid cooling plate 4. While supporting the battery group 3 through the support member 42, the flow path of the refrigerant can also be limited, so that the liquid cooling plate 4 has a better bearing capacity and a better cooling effect.
  • the side wall 14 of the box body 1 extends toward the second side 35 of the battery group 3 to form a bearing portion 11.
  • one end of the battery cell group 3 close to the side wall 14 of the box body 1 is supported by the bearing portion 11 formed by extending the side wall 14 of the box body 1, and the remaining area of the battery cell group 3 is supported by the support member 42 arranged in the cooling cavity 41, that is, the bearing portion 11 and the support member 42 respectively support different positions of the second side 35 of the battery cell group 3, thereby ensuring the stability of the overall structure of the module-free battery pack.
  • a bottom guard plate 12 is provided on a side of the box body 1 close to the second side 35, and the liquid cooling plate 4 is provided between the bottom guard plate 12 and the battery cell group 3; in one embodiment, the bottom guard plate 12 is connected to a side of the box body 1 close to the second side 35 by bolts, and in one embodiment, the side of the bottom guard plate 12 close to the second side 35 is fixedly connected to a side of the liquid cooling plate 4 away from the second side 35, and in one embodiment, the side of the bottom guard plate 12 close to the second side 35 is fixedly connected to the side of the liquid cooling plate 4 away from the second side 35.
  • One side of the battery cell group 3 is fixedly connected by a stir friction welding process or a FDS process.
  • the second side 35 of the battery cell group 3 is bonded to the side of the liquid cooling plate 4 close to the second side 35 by a thermally conductive structural adhesive, so that the battery cell group 3 is fixedly connected to the liquid cooling plate 4 without affecting normal heat transfer.
  • a protective coating is provided on the side of the liquid cooling plate 4 close to the box body 1 to protect the liquid cooling plate 4 and to prevent external heat from flowing into from the side of the liquid cooling plate 4 close to the box body 1, thereby affecting the cooling effect of the liquid cooling plate 4 on the battery cell group 3.
  • the adjacent battery cell groups 3 are bonded together by a structural member 33.
  • the adjacent battery cells 32 are bonded to each other on the side close to each other by a structural member 33 to improve the stability of the overall structure.
  • the support member 42 is disposed in the cooling cavity 41 of the liquid cooling plate 4 and is located at the junction of two adjacent battery cell groups 3.
  • One side of the support member 42 supports the second side 35 of one of the two adjacent battery cell groups 3, and the other side of the support member 42 supports the second side 35 of the other of the two adjacent battery cell groups 3. That is, the support member 42 supports the two adjacent battery cell groups 3 at the same time, effectively avoiding the problem of the middle area of the liquid cooling plate 4 sinking downward.
  • the first side 34 of the battery cell group 3 is pressed by a pressure relief component 2, and the pressure relief component 2 is opposite to the explosion-proof valve 31 of the battery cell 32.
  • the pressure relief component 2 is used to dredge the eruption material ejected from the explosion-proof valve 31 in a directional manner, and the pressure relief component 2 is pressed against the battery cell group 3 to prevent the battery cell group 3 from being affected by the cyclic expansion force and causing the battery cell group 3 to rise, so that the pressure relief component 2 as the pressure relief channel of the battery cell 32 and the liquid cooling plate 4 as the cold source of the battery cell 32 form a fixed structure of the battery pack, and realize the combination of the pressure relief component 2, the liquid cooling plate 4 and the mechanical structure of the box 1, optimize the structure of the module-free battery pack, simplify the process, and enhance the rigidity of the system.
  • the pressure relief component 2 includes a pressure relief pipe 21, and a trigger channel 23 is provided between the pressure relief pipe 21 and the explosion-proof valve 31 of the battery cell group 3, and a trigger gasket 24 is installed in the trigger channel 23.
  • the trigger gaskets 24 at other positions and the weak parts 22 at other positions on the pressure relief pipe 21 are not affected, and the remaining areas of the trigger channel 23 continue to be closed to prevent the eruption from the explosion-proof valve 31 of the battery cell 32 from splashing onto the surrounding battery cells 32, or the eruption in the pressure relief pipe 21 from flowing back onto the explosion-proof valve 31 of the surrounding battery cells 32, so as to avoid the surrounding battery cells 32 from being affected, so as to realize the directional dredging of the eruption from the explosion-proof valve 31 by the pressure relief pipe 21, and solve the thermal safety pressure relief of the module-free battery pack.
  • the adjacent battery cell groups 3 are bonded together by a structural member 33.
  • the adjacent battery cells 32 are bonded to each other on the side close to each other by a structural member 33 to improve the stability of the overall structure.
  • the liquid cooling plate 4 is provided with a hollow recess 43, and the support member 42 is embedded in the hollow recess 43.
  • the support member 42 is located at the junction of two adjacent battery cell groups 3, and one side of the support member 42 supports the second side 35 of one of the two adjacent battery cell groups 3, and the other side of the support member 42 supports the second side 35 of the other of the two adjacent battery cell groups 3, that is, the support member 42 supports the two adjacent battery cell groups 3 at the same time, effectively avoiding the liquid cooling plate 4 from
  • the battery pack 3 is not dented downward, and the first side 34 of the battery pack 3 is pressed by a pressure relief component 2, and the pressure relief component 2 is opposite to the explosion-proof valve 31 of the battery pack 32.
  • the pressure relief component 2 is used to dredge the ejected material from the explosion-proof valve 31 in a directional manner, and the pressure relief component 2 is pressed against the battery pack 3 to prevent the battery pack 3 from being affected by the cyclic expansion force and causing the battery pack 3 to rise, so that the pressure relief component 2 as the pressure relief channel of the battery pack 32 and the liquid cooling plate 4 as the cold source of the battery pack 32 form a fixed structure of the battery pack, and the pressure relief component 2, the liquid cooling plate 4 and the mechanical structure of the box 1 are combined to optimize the structure of the module-free battery pack, simplify the process, and enhance the rigidity of the system.
  • the pressure relief component 2 includes a pressure relief pipe 21, and a trigger channel 23 is provided between the pressure relief pipe 21 and the explosion-proof valve 31 of the battery pack 3, and a trigger gasket 24 is installed in the trigger channel 23.
  • the trigger gaskets 24 at other positions and the weak parts 22 at other positions on the pressure relief pipe 21 are not affected, and the remaining areas of the trigger channel 23 continue to be closed to prevent the eruption from the explosion-proof valve 31 of the battery cell 32 from splashing onto the surrounding battery cells 32, or the eruption in the pressure relief pipe 21 from flowing back onto the explosion-proof valve 31 of the surrounding battery cells 32, so as to avoid the surrounding battery cells 32 from being affected, so as to realize the directional dredging of the eruption from the explosion-proof valve 31 by the pressure relief pipe 21, and solve the thermal safety pressure relief of the module-free battery pack.

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

Abstract

本申请公开了一种电池包，包括箱体；多个电芯组，所述电芯组包括多个电芯；泄压组件连接于所述箱体并抵压所述电芯组的第一侧；液冷板设有支撑件，所述支撑件位于相邻两个所述电芯组的交界处，并且所述支撑件的一侧支撑相邻两个的一所述电芯组的所述第二侧，所述支撑件的另一侧支撑相邻两个的另一所述电芯组的所述第二侧。

Description

一种电池包
本申请要求在2023年6月19日提交中国专利局、申请号为2023215714333的中国专利申请以及在2023年6月19日提交中国专利局、申请号为2023107301795的中国专利申请早的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，尤其涉及一种电池包。
 背景技术
电池包的CTP成组技术满足高比能量，低成本的市场需求，CTP技术虽然已发展到CTP3.0，但是系统设计复杂，成本较高，系统成组困难效率低下。
在相关技术中，随着CTP电池包的无模组化，电芯组需要具备更高的结构强度才能满足无模组的需求，一般情况下，均是采用另设的结构来固定电芯组，造成了CTP电池包结构的复杂化。
发明内容
为了克服上述现有技术所述的至少一种缺陷，本申请提供一种电池包，能够增加系统结构强度并且实现热电分离。
根据申请实施例的一种电池包，包括箱体；多个电芯组，所述电芯组包括多个电芯；泄压组件，连接于所述箱体并与所述电芯的防爆阀相对，所述泄压组件抵压所述电芯组的第一侧；液冷板，连接于所述箱体并抵接于所述电芯组的第二侧，所述第二侧与所述第一侧相对，所述液冷板设有支撑件，所述支撑件位于相邻两个所述电芯组的交界处，并且所述支撑件的一侧支撑相邻两个的一所述电芯组的所述第二侧，所述支撑件的另一侧支撑相邻两个的另一所述电芯组的所述第二侧。
在本电池包中，通过在液冷板上设置支撑件，同时支撑相邻的两个电芯组，避免液冷板被电芯组压至变形，同时所述电芯组的第一侧抵压有泄压组件，所述泄压组件与所述电芯的防爆阀相对，利用泄压组件对防爆阀喷出的喷发物进行定向疏通，并且通过泄压组件对电芯组的抵压，能够避免电芯组受循环膨胀力影响发生上窜现象，以使作为电芯的泄压通道的泄压组件和作为电芯的冷源的液冷板形成无模组电池包的固定结构，实现将泄压组件、液冷板和箱体机械结构相结合，优化无模组电池包的结构，简化工艺，增强系统刚度。
根据本申请的一些实施例，所述泄压管道开设有若干薄弱部，所述薄弱部与所述防爆阀相对设置。
根据本申请的一些实施例，所述泄压管道与防爆阀之间形成有触发通道，所述触发通道中装配有触发垫片。
根据本申请的一些实施例，所述触发垫片由耐高温的绝缘材料制成。
根据本申请的一些实施例，所述泄压管道的侧部向所述电芯组延伸形成与电芯组相抵接的压边。
根据本申请的一些实施例，相邻所述电芯之间通过结构件粘接为一体。
根据本申请的一些实施例，所述液冷板内部设置有用于容纳冷媒的冷却腔。
根据本申请的一些实施例，所述支撑件设置于冷却腔中。
根据本申请的一些实施例，所述液冷板上设有避空凹陷部，所述支撑件嵌装于所述避空凹陷部内。
根据本申请的一些实施例，所述箱体的侧壁向所述电芯组的所述第二侧延伸形成承载部，所述承载部和所述支撑件分别支撑所述电芯组的所述第二侧的不同位置。
根据本申请的一些实施例，还包括设置在电芯组外侧的支架，所述支架的端部与所述箱体的侧壁固定连接，所述泄压组件与所述支架固定连接。
根据本申请的一些实施例，所述泄压组件与所述支架之间固定连接有基座。
根据本申请的一些实施例，所述箱体靠近所述第二侧的一侧设置有底护板，所述液冷板设置于所述底护板与电芯组之间。
根据本申请的一些实施例，所述底护板靠近所述第二侧的一侧与所述液冷板远离所述第二侧的一侧固定连接。
综上所述，本申请提供的电池包具有如下技术效果：
1）通过在液冷板上设置支撑件，同时支撑相邻的两个电芯组，避免液冷板被电芯组压至变形，同时所述电芯组的第一侧抵压有泄压组件，所述泄压组件与所述电芯的防爆阀相对，利用泄压组件对防爆阀喷出的喷发物进行定向疏通，并且通过泄压组件对电芯组的抵压，能够避免电芯组受循环膨胀力影响发生上窜现象，以使作为电芯的泄压通道的泄压组件和作为电芯的冷源的液冷板形成无模组电池包的固定结构，实现将泄压组件、液冷板和箱体机械结构相结合，优化无模组电池包的结构，简化工艺，增强系统刚度；
2）通过在泄压管道与电芯的防爆阀之间形成触发通道，并且所述触发通道中装配触发垫片，以使电芯的防爆阀喷发时，触发垫片与该防爆阀相对应的位置被喷发物冲破，然后喷发物穿过触发垫片进入泄压管道中，其余位置的触发垫片不受影响，继续封闭触发通道的其余区域，以防止电芯的防爆阀喷发的喷发物溅射到周边的电芯上，或者泄压管道内的喷发物倒流到周边的电芯的防爆阀上，从而避免周边的电芯被影响；
3）通过泄压管道的侧部向电芯组方向延伸形成与电芯组相抵接的压边，以压住电芯组，并且提高泄压管道及系统刚度，避免电芯组喷发时，电芯组与泄压管道直接发生抵接，缓冲电芯组与泄压管道之间的作用力，同时压边能够有效阻挡喷发物从电芯组的侧边溢出，避免电芯组喷出的喷发物影响周边的电芯组，并且延伸出来的压边使得泄压管道与防爆阀之间存在间隙，从而形成触发通道，充分优化无模组电池包的结构。
 附图说明
图1为本申请实施例的电池包的结构示意图；
图2为本申请实施例的电池包的又一结构示意图；
图3为图2中E区域放大示意图；
图4为本申请实施例的电池包的再一结构示意图；
图5为图4中A区域放大示意图；
图6为图4中B区域放大示意图；
图7为图4中C区域放大示意图。
其中，附图标记含义如下：
1、箱体；11、承载部；12、底护板；13、支架；14、侧壁；15、基座；2、泄压组件；21、泄压管道；22、薄弱部；23、触发通道；24、触发垫片；25、压边；3、电芯组；31、防爆阀；32、电芯；33、结构件；34、第一侧；35、第二侧；4、液冷板；41、冷却腔；42、支撑件；43、避空凹陷部。
具体实施方式
在本申请的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
在本申请中，所述第一侧34均指电芯组3在垂直方向上的顶部，所述第二侧35均指电芯组3在垂直方向上的底部。
参阅图1、图2、图3、图4、图5、图6和图7，在本申请实施例中，一种电池包，包括箱体1、泄压组件2、液冷板4和多个电芯组3，在一些实施例中，所述电芯组3包括多个电芯32；泄压组件2，连接于所述箱体1并与所述电芯32的防爆阀31相对，所述泄压组件2抵压所述电芯组3的第一侧34；液冷板4，连接于所述箱体1并抵接于所述电芯组3的第二侧35，所述第二侧35与所述第一侧34相对，所述液冷板4设有支撑件42，所述支撑件42位于相邻两个所述电芯组3的交界处，并且所述支撑件42的一侧支撑相邻两个的一所述电芯组3的所述第二侧35，所述支撑件42的另一侧支撑相邻两个的另一所述电芯组3的所述第二侧35。在一些实施例中，通过在液冷板4上设置支撑件42，同时支撑相邻的两个电芯组3，避免液冷板4被电芯组3压至变形，同时所述电芯组3的所述第一侧34抵压有泄压组件2，所述泄压组件2与所述电芯32的防爆阀31相对，利用泄压组件2对防爆阀31喷出的喷发物进行定向疏通，并且通过泄压组件2对电芯组3的抵压，能够避免电芯组3受循环膨胀力影响发生上窜现象，以使作为电芯32的泄压通道的泄压组件2和作为电芯32的冷源的液冷板4形成无模组电池包的固定结构，实现将泄压组件2、液冷板4和箱体1机械结构相结合，优化电池包结构，简化工艺，增强系统刚度。
在一些实施例中，至少一个所述电芯组3沿所述泄压组件2的长度方向排布于所述泄压组件2的下方，并且所述泄压组件2抵压于所述电芯组3的所述第一侧34，以将电芯32压紧在液冷板4上，避免电芯32向上移动，在一实施例中，还包括设置在电芯组3外侧的支架13，所述支架13的端部与所述箱体1的侧壁14固定连接，所述泄压组件2与所述支架13固定连接。进一步的，所述泄压组件2与所述支架13之间固定连接有基座15；具体的，所述固定连接所采用的连接方式可以为焊接或螺栓连接；在一实施例中，所述支架13的端部与所述箱体1的侧壁14通过螺栓连接，所述基座15通过螺栓连接在所述支架13上，所述泄压组件2通过螺栓连接在所述基座15上；在一实施例中，所述支架13与所述基座15可以为一体成型设置，所述泄压组件2通过螺栓连接在所述基座15上，所述支架13的端部与所述箱体1的侧壁14通过螺栓连接，以使泄压组件2连接于箱体1，能够作为箱体1的加强结构，提高箱体1的强度；同时所述泄压组件2与所述电芯32的防爆阀31相对，对防爆阀31喷出的喷发物进行定向疏通，以实现热电分离，并且能够避免电芯组3受循环膨胀力影响发生上窜现象，导致连接失效，以使泄压组件2作为热电分离的专用泄压通道的同时，兼并作为箱体1的加强结构，提高箱体1的强度，实现将泄压组件2与箱体1机械结构相结合，解决系统热安全泄压的同时，优化系统结构兼并提升系统刚度，能够降低无模组电池包的生产成本，简化工艺，提升良率及效率。
进一步的，多个所述电芯组3可以沿箱体1的长度方向或者宽度方向进行排布设置，并且每个所述电芯组3的所述第一侧34抵压有一泄压组件2，所述泄压组件2与所述电芯32的防爆阀31相对，对防爆阀31喷出的喷发物进行定向疏通，解决系统热安全泄压，同时通过泄压组件2将电芯32压紧在液冷板4上，避免电芯32向上移动，使得液冷板4能够与电芯32接触，进行有效的降温，并且设置在多个所述电芯组3上的泄压组件2兼并作为箱体1的加强结构，提高箱体1的强度，实现将泄压组件2与箱体1机械结构相结合，解决系统热安全泄压的同时，优化系统结构兼并提升系统刚度，能够降低成本，简化工艺，提升良率及效率，进一步的，通过抵压于所述电芯组3的所述第一侧34的泄压组件2以及抵接于所述电芯组3的所述第二侧35液冷板4形成电池包的在竖直方向上的固定结构，且在液冷板4上设置支撑件42，同时支撑相邻的两个电芯组3，避免液冷板4被压变形，实现将泄压组件2、液冷板4和箱体1机械结构相结合，优化无模组电池包的结构，简化工艺，增强系统刚度。
参阅图7，在一些实施例中，所述泄压组件2包括泄压管道21，所述电芯32的防爆阀31与所述泄压管道21相对设置，以使电芯32的防爆阀31喷出的高温高压的喷发物进入泄压管道21，并沿泄压管道21进行定向疏通，避免高温高压的喷发物溅射到周边部件或电芯32，造成周边部件或电芯32损坏，在一实施例中，所述泄压管道21开设有若干薄弱部22，所述薄弱部22与所述防爆阀31相对设置。在一实施例中，所述电芯32的防爆阀31对应设置于泄压管道21的薄弱部22的下方，以使电芯32的防爆阀31开阀时释放的高温高压的气体直接通过与其相对的薄弱部22进入泄压管道21中，而泄压管道21其他位置上的薄弱部22仍保持封闭，能够有效防止泄压管道21内的喷发物倒流到周边的电芯32的防爆阀31上，进一步的，所述薄弱部22与所述防爆阀31密封连接，以避免防爆阀31开阀时喷出的高温高压的喷发物外溢，溅射到周边部件或电芯32，造成周边部件或电芯32损坏；进一步的，所述电芯32上可对应所述泄压管道21设置有相应的凹槽，所述泄压管道21卡接于凹槽中，以使泄压管道21与电芯32形成更牢固的连接，同时泄压管道21的薄弱部22紧贴在电芯组3的防爆阀31上或者通过导管等导向构件与电芯32的防爆阀31形成密封连接，以避免防爆阀31开阀时喷出的高温高压的气体外溢，能够有效地引导防爆阀31开阀时喷出的高温高压的喷发物进入泄压管道21，并沿泄压管道21进行定向疏通。
在一些实施例中，利用液冷板4与所泄压管道21形成竖直方向上的固定结构对电芯组3进行限位固定，并且多个所述电芯32沿所述泄压管道21的长度方向排布，且抵压于所述泄压管道21的下方。当某一电芯32的防爆阀31开阀喷出的高温高压的喷发物时，喷发物中可能有电芯32的电解液等物质，由于每个泄压管道21同时连通于多个电芯32的防爆阀31，喷发物进入泄压管道21后，可以沿泄压管道21流动，并倒流到其他电芯32的防爆阀31上，致使其他电芯32的防爆阀31被污染或者受高温影响而发生开阀，造成连锁效应，因此，参阅图3和图6，在一些实施例中，所述泄压管道21与防爆阀31之间设置有触发通道23，所述触发通道23中装配有触发垫片24。在一实施例中，电芯组3与抵压于所述电芯组3的所述第一侧34的泄压管道21形成有触发通道23，触发垫片24装配在所述触发通道23中，当电芯32的防爆阀31喷发时，触发垫片24与该防爆阀31相对应的位置被喷发物冲破，然后喷发物依次穿过触发垫片24和泄压管道21的薄弱部22进入泄压管道21中，由于防爆阀31开阀时的冲击力向上冲击，所以其余位置的触发垫片24并未受影响，继续封闭触发通道23的其余区域，以防止电芯32的防爆阀31喷发的喷发物溅射到周边的电芯32上，或者泄压管道21内的喷发物倒流到周边的电芯32的防爆阀31上，从而避免周边的电芯32被影响。在一实施例中，所述触发垫片24由耐高温的绝缘材料制成，以避免触发垫片24被高温的喷发物融化，能够有效阻挡高温的喷发物倒流到其他电芯32的防爆阀31上。进一步的，所述触发垫片24优选云母纸，具体的，云母纸装配在泄压管道21与防爆阀31之间的触发通道23，以使触发通道23处于封闭状态，也即此时相邻的电芯32的防爆阀31被云母纸阻隔并封闭，并且泄压管道21与防爆阀31也被自身的薄弱部22以及云母纸阻隔并封闭，相邻的电芯32的防爆阀31喷发的喷发物无法溅射到周边的电芯32，在泄压管道21中流动的喷发物无法穿过设置有云母纸的触发通道23，从而避免喷发物倒流到周边电芯32的防爆阀31上的现象，当某一个电芯32的防爆阀31开阀的喷出高压高温的喷发物时，在喷发物的冲击下，云母纸上与该防爆阀31相对应的位置被喷发物冲破，而云母纸的其他区域未受影响，继续将开阀的防爆阀31与其他防爆阀31阻隔并封闭，然后喷发物突破泄压管道21的薄弱部22进入到泄压管道21中，并沿泄压管道21进行流动，由于其他位置仍封闭有云母纸，以及泄压管道21其他位置的薄弱部22未必冲破，使得喷发物只能继续沿泄压管道21进行流动，无法倒流到周边的防爆阀31上，有效保护周边的电芯组3不受影响。
在一些实施例中，所述泄压管道21的侧部向电芯组3延伸形成与电芯组3相抵接的压边25。在一实施例中，所述泄压管道21的两个侧部均向电芯组3延伸形成压边25，所述压边25与所述电芯组3相抵接，以抵接所电芯组3，并且提高泄压管道21及系统刚度，避免电芯组3喷发时，电芯组3与泄压管道21直接发生抵接，缓冲电芯组3与泄压管道21之间的作用力，同时压边25能够有效阻挡喷发物从电芯组3的侧边溢出，避免电芯组3喷出的喷发物影响周边的电芯组3，并且延伸出来的压边25使得泄压管道21与防爆阀31之间存在间隙，从而形成触发通道23，充分优化无模组电池包的结构。
参阅图2、图3、图4、图5和图6，在一些实施例中，所述液冷板4内部设置有用于容纳冷媒的冷却腔41。在一实施例中，所述液冷板4内部设置有中空的冷却腔41，用于容纳冷媒，以对设置在液冷板4上方的电芯组3进行冷却降温，在一实施例中，所述冷却腔41可设置有进出口，用于冷媒的进出，在一些实施例中，通过冷却腔41的进出口来更换冷却腔41中的冷媒，以保证液冷板4的冷却效果。在实际应用中，由于所述液冷板4内部设置有用于容纳冷媒的冷却腔41，导致所述液冷板4的承重能力弱，并且在电源模块的长时间重压之下，所述液冷板4容易发生变形，尤其是液冷板4的中部区域，极容易发生向下凹陷等问题，破坏电源模块原本的布局设置，严重系统整体结构的稳定性，因此，在所述冷却腔41中设置有支撑件42，用于支撑电芯组3，在一实施例中，所述支撑件42可以为格栅状结构，能够支撑电芯组3的同时，不影响冷媒在冷却腔41中的流动。进一步的，所述支撑件42还可以在液冷板4的冷却腔41中围成冷却流道，通过支撑件42实现对电芯组3进行支撑的同时，还可限定冷媒的流动路径，以使液冷板4具备更好的承重能力以及更优的冷却效果。参阅图4，在一实施例中，所述箱体1的侧壁14向所述电芯组3的所述第二侧35延伸形成承载部11。也即电芯组3靠近箱体1的侧壁14的一端由箱体1侧壁14延伸形成承载部11进行支撑，电芯组3的其余区域由设置在冷却腔41中的支撑件42进行支撑，也即所述承载部11和所述支撑件42分别支撑所述电芯组3的所述第二侧35的不同位置，从而保证无模组电池包整体结构的稳定。
在一些实施例中，所述箱体1靠近所述第二侧35的一侧设置有底护板12，所述液冷板4设置于所述底护板12与电芯组3之间；在一实施例中，所述底护板12与箱体1靠近所述第二侧35的一侧通过螺栓连接，在一实施例中，所述底护板12靠近所述第二侧35的一侧与所述液冷板4远离所述第二侧35的一侧固定连接，在一实施例中，所述底护板12靠近所述第二侧35的一侧与所述液冷板4远离所述第二侧35的一侧通过搅拌摩擦焊工艺进行固定连接或者通过FDS工艺进行固定连接，进一步的，所述电芯组3的所述第二侧35通过导热结构胶粘接于所述液冷板4靠近所述第二侧35的一侧上，以使电芯组3固定连接于液冷板4上，并且不影响正常的热量传递，同时所述液冷板4靠近箱体1的一侧设置有防护涂层，以保护液冷板4，并且能够阻碍外界热量从液冷板4靠近箱体1的一侧流入，影响液冷板4对电芯组3的冷却效果。
参阅图1、图2、图3、图4、图5、图6和图7，在一些实施例中，相邻的所述电芯组3通过结构件33粘接为一体。具体的，相邻的所述电芯32相互靠近的一侧通过结构件33相互粘接，以提高整体结构的稳定性，在一实施例中，所述支撑件42设置液冷板4的冷却腔41中，且位于相邻两个所述电芯组3的交界处并且所述支撑件42的一侧支撑相邻两个的一所述电芯组3的所述第二侧35，所述支撑件42的另一侧支撑相邻两个的另一所述电芯组3的所述第二侧35，也即所述支撑件42同时支撑相邻的两个所述电芯组3，有效避免液冷板4中部区域发生向下凹陷等问题，同时所述电芯组3的第一侧34抵压有泄压组件2，所述泄压组件2与所述电芯32的防爆阀31相对，利用泄压组件2对防爆阀31喷出的喷发物进行定向疏通，并且通过泄压组件2对电芯组3的抵压，能够避免电芯组3受循环膨胀力影响发生上窜现象，以使作为电芯32的泄压通道的泄压组件2和作为电芯32的冷源的液冷板4形成电池包的固定结构，实现将泄压组件2、液冷板4和箱体1机械结构相结合，优化无模组电池包的结构，简化工艺，增强系统刚度。在一实施例中，所述泄压组件2包括泄压管道21，所述泄压管道21与电芯组3的防爆阀31之间设置有触发通道23，所述触发通道23中装配有触发垫片24。当电芯32的防爆阀31喷发时，触发垫片24与该防爆阀31相对应的位置被喷发物冲破，然后喷发物穿过泄压管道21的薄弱部22进入泄压管道21中，由于防爆阀31开阀时的冲击力向上冲击，所以其余位置的触发垫片24以及泄压管道21上其余位置的薄弱部22并未受影响，继续封闭触发通道23的其余区域，以防止电芯32的防爆阀31喷发的喷发物溅射到周边的电芯32上，或者泄压管道21内的喷发物倒流到周边的电芯32的防爆阀31上，避免周边的电芯32被影响，实现泄压管道21对防爆阀31喷出的喷发物进行定向疏通，解决无模组电池包的热安全泄压。
参阅图1、图2、图3、图4、图5、图6和图7，在一些实施例中，相邻的所述电芯组3通过结构件33粘接为一体。具体的，相邻的所述电芯32相互靠近的一侧通过结构件33相互粘接，以提高整体结构的稳定性，在一实施例中，所述液冷板4上设有避空凹陷部43，所述支撑件42嵌装于所述避空凹陷部43内，且所述支撑件42位于相邻两个所述电芯组3的交界处并且所述支撑件42的一侧支撑相邻两个的一所述电芯组3的所述第二侧35，所述支撑件42的另一侧支撑相邻两个的另一所述电芯组3的所述第二侧35，也即所述支撑件42同时支撑相邻的两个所述电芯组3，有效避免液冷板4发生向下凹陷等问题，同时所述电芯组3的所述第一侧34抵压有泄压组件2，所述泄压组件2与所述电芯32的防爆阀31相对，利用泄压组件2对防爆阀31喷出的喷发物进行定向疏通，并且通过泄压组件2对电芯组3的抵压，能够避免电芯组3受循环膨胀力影响发生上窜现象，以使作为电芯32的泄压通道的泄压组件2和作为电芯32的冷源的液冷板4形成电池包的固定结构，实现将泄压组件2、液冷板4和箱体1机械结构相结合，优化无模组电池包的结构，简化工艺，增强系统刚度。在一实施例中，所述泄压组件2包括泄压管道21，所述泄压管道21与电芯组3的防爆阀31之间设置有触发通道23，所述触发通道23中装配有触发垫片24。当电芯32的防爆阀31喷发时，触发垫片24与该防爆阀31相对应的位置被喷发物冲破，然后喷发物穿过泄压管道21的薄弱部22进入泄压管道21中，由于防爆阀31开阀时的冲击力向上冲击，所以其余位置的触发垫片24以及泄压管道21上其余位置的薄弱部22并未受影响，继续封闭触发通道23的其余区域，以防止电芯32的防爆阀31喷发的喷发物溅射到周边的电芯32上，或者泄压管道21内的喷发物倒流到周边的电芯32的防爆阀31上，避免周边的电芯32被影响，实现泄压管道21对防爆阀31喷出的喷发物进行定向疏通，解决无模组电池包的热安全泄压。

Claims (14)

  1. 一种电池包，包括
    箱体（1）；
    多个电芯组（3），所述电芯组（3）包括多个电芯（32）；
    泄压组件（2），连接于所述箱体（1）并与所述电芯（32）的防爆阀（31）相对，所述泄压组件（2）抵压所述电芯组（3）的第一侧（34）；
    液冷板（4），连接于所述箱体（1）并抵接于所述电芯组（3）的第二侧（35），所述第二侧（35）与所述第一侧（34）相对，所述液冷板（4）设有支撑件（42），所述支撑件（42）位于相邻两个所述电芯组（3）的交界处，并且所述支撑件（42）的一侧支撑相邻两个的一所述电芯组（3）的所述第二侧（35），所述支撑件（42）的另一侧支撑相邻两个的另一所述电芯组（3）的所述第二侧（35）。
  2. 根据权利要求1所述的电池包，其中，所述泄压组件（2）包括泄压管道（21），所述泄压管道（21）开设有薄弱部（22），所述薄弱部（22）与所述防爆阀（31）相对设置。
  3. 根据权利要求2所述的电池包，其中，所述泄压管道（21）与防爆阀（31）之间形成有触发通道（23），所述触发通道（23）中装配有触发垫片（24）。
  4. 根据权利要求3所述的电池包，其中，所述触发垫片（24）由耐高温的绝缘材料制成。
  5. 根据权利要求2所述的电池包，其中，所述泄压管道（21）的侧部向所述电芯组（3）延伸形成与电芯组（3）相抵接的压边（25）。
  6. 根据权利要求1-5任一项所述的电池包，其中，相邻所述电芯（32）之间通过结构件（33）粘接为一体。
  7. 根据权利要求1-5任一项所述的电池包，其中，所述液冷板（4）内部设置有用于容纳冷媒的冷却腔（41）。
  8. 根据权利要求7所述的电池包，其中，所述支撑件（42）设置于冷却腔（41）中。
  9. 根据权利要求7所述的电池包，其中，所述液冷板（4）上设有避空凹陷部（43），所述支撑件（42）嵌装于所述避空凹陷部（43）内。
  10. 根据权利要求1所述的电池包，其中，所述箱体（1）的侧壁（14）向所述电芯组（3）的所述第二侧（35）延伸形成承载部（11），所述承载部（11）和所述支撑件（42）分别支撑所述电芯组（3）的所述第二侧（35）的不同位置。
  11. 根据权利要求1所述的电池包，其中，还包括设置在电芯组（3）外侧的支架（13），所述支架（13）的端部与所述箱体（1）的侧壁（14）固定连接，所述泄压组件（2）与所述支架（13）固定连接。
  12. 根据权利要求11所述的电池包，其中，所述泄压组件（2）与所述支架（13）之间固定连接有基座（15）。
  13. 根据权利要求1所述的电池包，其中，所述箱体（1）靠近所述第二侧（35）的一侧设置有底护板（12），所述液冷板（4）设置于所述底护板（12）与电芯组（3）之间。
  14. 根据权利要求13所述的电池包，其中，所述底护板（12）靠近所述第二侧（35）的一侧与所述液冷板（4）远离所述第二侧（35）的一侧固定连接。
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