CN109962190B - Battery pack and vehicle - Google Patents
Battery pack and vehicle Download PDFInfo
- Publication number
- CN109962190B CN109962190B CN201711432882.9A CN201711432882A CN109962190B CN 109962190 B CN109962190 B CN 109962190B CN 201711432882 A CN201711432882 A CN 201711432882A CN 109962190 B CN109962190 B CN 109962190B
- Authority
- CN
- China
- Prior art keywords
- battery
- battery pack
- heat
- absorbing material
- temperature threshold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
-
- 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
- H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack and a vehicle, the battery pack includes: the battery comprises a shell, an elastic membrane and a battery, wherein the interior of the shell is hollow; the elastic membrane is arranged in the shell and divides the inner space of the shell into a battery accommodating cavity and a buffer cavity, and the buffer cavity is positioned at the upper part of the battery accommodating cavity; the battery accommodating cavity is internally accommodated with a first heat-absorbing material, and the first heat-absorbing material is heated to generate gas at a first preset temperature valve value; the battery is located in the battery receiving cavity. From this, through the casing with, elastic membrane and battery cooperation, can promote the energy density of battery package to can increase the electric quantity of battery package, and the cushion chamber can provide the deformation space for the elastic membrane, thereby can promote the safety in utilization of battery package.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a battery pack and a vehicle with the battery pack.
Background
In the related technology, the battery pack is generally formed by connecting battery monomers in series or in parallel through structural members to form a module, the module is assembled into the battery pack, large gaps are formed among the battery monomers, between the module and the module or some structural members are filled in the gaps, and the gaps or the structural members greatly occupy the space of the battery pack, so that the energy density of the battery pack is greatly reduced, and the performance and the market acceptance degree of a product are finally influenced.
Moreover, the cooling (heating) of the battery pack is generally achieved through natural cooling outside the battery pack or cooling through a liquid cooling pipeline, the cooling pipeline may be unevenly distributed, and only the local part of the battery pack or the local part of the module can be cooled (or heated), so that the attenuation of part of the battery is accelerated finally.
In addition, part of the battery packs are made of phase-change composite materials and heat conduction oil for thermal optimization, but the materials are easily oxidized or expanded in natural environment or under the high-temperature condition after the battery is heated, so that new potential safety hazards are brought. Once a fire occurs in the battery pack, no certain measures are taken to stop the expansion of the fire, so that the fire is easy to spread out of control, and great life and property loss is brought.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a battery pack which can improve the energy density of the battery pack and can also improve the use safety of the battery pack.
The invention further provides a vehicle.
The battery pack according to the present invention includes: the battery comprises a shell, an elastic membrane and a battery, wherein the interior of the shell is hollow; the elastic membrane is arranged in the shell and divides the inner space of the shell into a battery accommodating cavity and a buffer cavity, and the buffer cavity is positioned at the upper part of the battery accommodating cavity; the battery accommodating cavity is internally accommodated with a first heat-absorbing material, and the first heat-absorbing material is heated to generate gas at a first preset temperature valve value; the battery is located in the battery receiving cavity.
According to the battery pack, the shell, the elastic membrane and the battery are matched, so that the energy density of the battery pack can be improved, the electric quantity of the battery pack can be increased, the buffer cavity can provide a deformation space for the elastic membrane, and the use safety of the battery pack can be improved.
Optionally, a second heat absorbing material is contained in the buffer cavity, and the second heat absorbing material is heated to generate gas at a second preset temperature threshold.
Further, the first predetermined temperature threshold is less than the second temperature threshold; when the temperature in the battery accommodating cavity is greater than or equal to the first preset temperature threshold value, the first heat-absorbing material is heated to generate gas; and when the temperature in the battery accommodating cavity is greater than the second preset temperature threshold value, the first heat-absorbing material and the second heat-absorbing material are heated to generate gas.
Further, the housing includes: the elastic film is arranged in the tray, and a space below the elastic film in the tray is the battery accommodating cavity; the outer cover plate is spaced from the elastic membrane and fixed with the tray, and the space defined by the tray, the outer cover plate and the elastic membrane is the buffer cavity.
Specifically, a pressure release valve is arranged on the outer cover plate, and the pressure release valve is opened when the temperature in the battery pack reaches a third preset temperature threshold value.
Further, the second preset temperature threshold is smaller than the third preset temperature threshold; when the temperature in the battery accommodating cavity is higher than a third preset temperature threshold value, the first heat-absorbing material and the second heat-absorbing material are heated to generate gas, and the pressure release valve on the outer cover plate is opened.
Specifically, the outer cover plate includes: the battery pack comprises a body part and a pressure relief part, wherein the pressure relief part is connected with the body part and is broken or separated from the body part when the temperature in the battery pack reaches a third preset temperature threshold value.
Optionally, the thickness of the relief portion is less than the thickness of the body portion.
Further, the body portion and the relief portion are welded.
Specifically, the second heat absorbing material is a fire fighting agent.
Optionally, the outer cover is plugged on top of the tray.
Furthermore, an inserting groove is formed in the outer cover plate, an inserting connector is arranged on the tray, and the lower end face of the part, located on the inner side of the inserting connector, of the inserting groove abuts against the elastic membrane.
Specifically, the lower part of the elastic membrane is provided with a supporting piece which is used for supporting the elastic membrane and is in a grid shape.
Optionally, the battery includes a plurality of battery cells, the plurality of battery cells are accommodated in the battery accommodation cavity, and the first heat absorbing material is accommodated between the adjacent battery cells.
Further, the battery pack further comprises: the heat dissipation members are arranged between two adjacent battery cells and/or on the outer side of the battery cell at one end.
Specifically, the first heat absorption material is a phase change material or heat conduction oil.
According to the invention, the vehicle comprises the battery pack.
Drawings
Fig. 1 and 2 are sectional views of a battery pack according to an embodiment of the present invention in different directions;
fig. 3 is a schematic view of an outer cap plate of a battery pack according to an embodiment of the present invention.
Reference numerals:
a battery pack 10;
a tray 1; an inner peripheral wall 11; an outer peripheral wall 12; a plug-in connector 13;
a battery cell 2; an elastic film 5;
an outer cover plate 6; an insertion groove 61; a body portion 62; a relief portion 63;
a support 7;
a housing 8; a battery housing chamber 81; a buffer chamber 82.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A battery pack 10 according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.
As shown in fig. 1, a battery pack 10 according to an embodiment of the present invention includes: casing 8, elastic membrane 5 and battery, the battery can include a plurality of battery monomer 2, the inside cavity of casing 8, elastic membrane 5 sets up the inside at casing 8, and elastic membrane 5 divides into the battery with the 8 inner space of casing and holds chamber 81 and cushion chamber 82, battery monomer 2 is located the battery and holds the chamber 81, the battery can be battery monomer 2, a plurality of battery monomer 2 of having arranged in the battery holds the chamber 81, cushion chamber 82 is located the upper portion that the chamber 81 was held to the battery, and, the battery holds and has held first endothermic material in the chamber 81, first endothermic material is heated at first predetermined temperature valve value and is produced gas. In other words, the first heat-absorbing material can be converted into gas during heat absorption, so that the effect of absorbing heat and reducing the temperature of the battery can be achieved through a phase change process, and the cooling mode is simple, good in cooling effect and safe.
From this, this battery package 10 has cancelled the form that sets up of module, a plurality of battery monomer 2 align to grid are in battery holds chamber 81, can be furthest utilize the space of battery package 10, and, can separate the predetermined distance between per two adjacent battery monomer 2, the predetermined distance can be for being less than 2 mm's distance, like this hold under the certain circumstances in battery hold chamber 81's space, can increase the quantity of arranging of battery monomer 2 in battery holds chamber 81, can promote the energy density of battery package 10, thereby can increase the electric quantity of battery package 10.
Moreover, when the elastic membrane 5 deforms, the buffer cavity 82 can provide a deformation space for the elastic membrane 5, and the use safety of the battery pack 10 can be ensured.
Wherein, the housing 8 may further include: tray 1 and outer apron 6, elastic membrane 5 set up in tray 1, and the space that lies in the elastic membrane 5 below in tray 1 moreover holds chamber 81 for the battery, and outer apron 6 is spaced apart from elastic membrane 5 and fixed mutually with tray 1, and the space that tray 1, outer apron 6 and elastic membrane 5 limited is cushion chamber 82.
Wherein, inject the battery in the tray 1 and hold the chamber 81, the top that the chamber 81 was held to the battery is opened, a plurality of battery monomer 2 closely become to be listed as parallel arrangement, a plurality of battery monomer 2 hold respectively in the chamber 81 is held to the battery, it should be explained that, a plurality of battery monomer 2 can adopt the structure to glue and glue in the chamber 81 is held to the battery, also can fix in the chamber 81 is held to the battery through the metal crate of taking the insulating layer, as long as can fix a plurality of battery monomer 2 in the chamber 81 is held to the battery, other fixed modes also can.
The buffer cavity 82 is internally provided with a second heat absorbing material, the second heat absorbing material is heated at a second preset temperature threshold to generate gas, therefore, the second heat absorbing material becomes gas at a certain temperature, then the second heat absorbing material can take away heat in the battery accommodating cavity 81, when the gaseous second heat absorbing material rises and meets the outer cover plate 6, the gaseous second heat absorbing material exchanges heat with the outer cover plate 6 to transfer heat, so that heat dissipation of the second heat absorbing material is realized, and when the temperature of the gaseous second heat absorbing material falls, the second heat absorbing material becomes liquid again, falls on the elastic film 5, continuously performs reciprocating action, and heat dissipation and temperature reduction can be realized.
Wherein the second heat absorbing material may be a fire extinguishing agent, whereby the fire extinguishing agent may perform a fire extinguishing function in case of thermal runaway of the battery pack 10. The fire fighting agent can be a solid fire fighting agent or a liquid fire fighting agent, for example: the fire-fighting agent can be perfluorohexanone, but the invention is not limited to this, and the fire-fighting agent can be selected according to the actual use condition.
The battery pack 10 may further include: the heat dissipation members are disposed between two adjacent battery cells 2 and/or outside the battery cell 2 at one end, that is, the heat dissipation members may be disposed only between two adjacent battery cells 2, may be disposed only outside the battery cell 2 at one end, and may be disposed both between two adjacent battery cells 2 and outside the battery cell 2 at one end. The heat dissipation piece has the radiating effect to battery monomer 2, can dispel the heat to battery package 10 well, can realize the purpose to the cooling of battery monomer 2 to can realize the thermal optimization to battery monomer 2, simultaneously, also can prevent battery package 10 at the during operation high temperature, thereby can prevent the emergence of conflagration, and then can promote the safety in utilization of battery package 10.
Wherein a plurality of battery cells 2 are accommodated in the battery accommodating chamber 81, the first heat absorbing material is accommodated between the adjacent battery cells 2, the first heat absorbing material can exchange heat with the battery cells 2, and the first heat absorbing material has a variable volume when the temperature changes, it should be explained that the first heat absorbing material has a larger volume when the temperature rises. 5 closing cap batteries of elastic membrane hold chamber 81, elastic membrane 5 can be the good insulating polymer film of elasticity (like rubber materials), insulating polymer film can be according to the in-service use operating mode, it is insulating to select, elasticity is better, have certain structural strength and weatherability the material can, set up like this and can seal first endothermic material in battery holds chamber 81, can prevent first endothermic material and air direct contact to can avoid first endothermic material thermo-oxidation ageing.
When the heated volume of the first heat absorbing material is increased, the energy of the first heat absorbing material and the pressure of the battery pack 10 can be released through the volume change of the polymer elastic film 5, so that the danger of the battery pack 10 during operation can be avoided. Wherein, outer apron 6 and elastic membrane 5 spaced apart the setting, so set up can guarantee that first heat-absorbing material is heated the sufficient expansion space occasionally, also can understand that elastic membrane 5 is heated the sufficient expansion space occasionally. And outer apron 6 is fixed mutually with tray 1, can guarantee that battery package 10 has certain mechanical strength, can promote the fail safe nature of battery package 10.
In addition, the battery accommodating cavity 81 can be filled with nitrogen or inert gas, so that the battery accommodating cavity 81 forms a sealed cabin to isolate oxygen, thereby reducing the occurrence of fire and further improving the use safety and reliability of the battery pack 10. Meanwhile, by providing the first heat absorbing material in the BATTERY receiving cavity 81, thermal optimization inside the BATTERY pack 10 can be further achieved, polarization of temperature is reduced, a transfer speed of thermal spread can be reduced, and a corresponding thermal optimization program can be automatically started by sensing a temperature change of the BATTERY pack 10 through devices such as a BMS (BATTERY MANAGEMENT SYSTEM — BATTERY management system).
From this, through the form that sets up that cancels the module to a plurality of battery monomer 2, with a plurality of battery monomer 2 align to grid in battery holds chamber 81, can increase the quantity of arranging of battery monomer 2 in battery holds chamber 81, can promote the energy density of battery package 10 to can increase the electric quantity of battery package 10. Moreover, by disposing the heat sink between two adjacent battery cells 2 and/or outside the battery cell 2 at one end, the battery pack 10 can be well heat-dissipated, so that thermal optimization of the battery cell 2 can be achieved. In addition, the elastic film 5 seals the first heat-absorbing material between the adjacent battery cells 2, so that the first heat-absorbing material can be prevented from directly contacting with air, thermal-oxidative aging of the first heat-absorbing material can be avoided, the pressure of the battery pack 10 can be released, and the safety and reliability of the battery pack 10 can be improved.
Optionally, the heat exchanger tube that radiating piece can have the medium for flowing, the medium in the heat exchanger tube can be taken away the heat on the battery package 10, and the heat exchanger tube can set flat pipe into, and, the thickness of flat pipe is unanimous with the distance between two adjacent battery monomer 2 roughly, can guarantee like this that flat pipe is put between two adjacent battery monomer 2, also can make flat pipe and battery monomer surface laminate betterly, and then can dispel the heat to battery monomer 2 better. Wherein, the heat exchange tube can be a metal tube, for example: aluminum tubes, steel tubes, and the like.
Further, the heat exchange tube is also connected with an inlet tube and an outlet tube, that is, the heat exchange tube communicates with the inlet tube and the outlet tube, the tray 1 includes an inner circumferential wall 11 and an outer circumferential wall 12, the inner circumferential wall 11 defines a battery accommodating chamber 81, the outer circumferential wall 12 is wound around the outside of the inner circumferential wall 11, and the outer circumferential wall 12 and the inner circumferential wall 11 define a cavity accommodating the inlet tube and the outlet tube. The medium in the heat exchange tube can flow into the heat exchange tube from the inlet tube and also can flow out of the heat exchange tube from the outlet tube, and can form the circulating flow of the medium in the heat exchange tube, so that the heat of the battery pack 10 can be continuously taken away by the medium in the heat exchange tube, and further the heat optimization of the battery pack 10 can be realized.
Specifically, an insulating heat conducting pad is laid on the inner peripheral wall 11 of the tray 1, and the plurality of battery cells 2 are arranged on the insulating heat conducting pad. The insulating heat conduction pad has the effect of insulating, heat conduction, can prevent battery package 10 electric leakage, can guarantee battery package 10's work safety to, also can be with the heat transfer that battery package 10 during operation produced advance pipe and exit tube, then advance the medium in pipe and the exit tube and take away the heat, thereby can further cool down battery package 10.
Optionally, the first heat absorbing material may be a phase change material or heat conducting oil, the phase change material or the heat conducting oil has better heat conducting performance, and heat conducting and heat dissipating work can be completed by using the heat exchange tube, the phase change material and the heat conducting oil in a combined manner, so that the service performance of the battery pack 10 can be further improved, and further the user satisfaction can be improved.
Further, as shown in fig. 1 and 2, a supporting member 7 for supporting the elastic membrane 5 is disposed at a lower portion of the elastic membrane 5, and the supporting member 7 may be made of an insulating polymer material or a polymer material with an insulating surface, so that the supporting member 7 has sufficient supporting strength, and the elastic membrane 5 can be better supported. In addition, the supporting members 7 are arranged in a lattice shape, and when the elastic membrane 5 is expanded, the supporting members 7 do not hinder the expansion of the elastic membrane 5, so that the normal operation of the elastic membrane 5 can be ensured.
Specifically, as shown in fig. 1, the outer cover 6 is inserted into the top of the tray 1, so that the outer cover 6 can be more reliably connected to the tray 1, thereby improving the structural strength of the battery pack 10, and the outer cover 6 is preferably made of a structurally strong metal, such as: aluminium, steel etc. guarantee like this that outer apron 6 has under the circumstances of higher intensity, also can guarantee that outer apron 6 has fine heat conductivity to can realize better heat dissipation. Wherein the top of the tray 1 refers to the upper part of the tray 1 in fig. 1.
Alternatively, as shown in fig. 1, one of the outer cover 6 and the tray 1 is provided with a plug 13, and the other of the outer cover 6 and the tray 1 is provided with a plug groove 61, and the plug 13 is plugged in the plug groove 61. It should be noted that if the insertion groove 61 is provided on the outer cover 6, the insertion head 13 should be provided on the tray 1, and if the insertion groove 61 is provided on the tray 1, the insertion head 13 should be provided on the outer cover 6. The plug structure thus provided is simple, the structure of the battery pack 10 can be simplified, and the mating of the plug 13 and the plug groove 61 is simple and convenient, which makes the plug operation easier.
Further, be provided with inserting groove 61 on the outer apron 6, be provided with bayonet joint 13 on the tray 1, inserting groove 61 is located the lower terminal surface of the inboard part of bayonet joint 13 and ends on elastic membrane 5, can make the battery monomer 2 in the battery package 10, support piece 7 and elastic membrane 5's position more fixed like this to can promote the overall structure stability of battery package 10, and then can further promote the overall structure intensity of battery package 10.
Optionally, as shown in fig. 1, a pressure relief valve is arranged on the outer cover plate 6, the pressure relief valve is opened when the temperature in the battery pack 10 reaches a third preset temperature threshold, the pressure relief valve has a pressure relief effect, and when the pressure in the battery pack 10 becomes large, the pressure relief valve is opened to reduce the pressure in the battery pack 10, so that the pressure balance between the pressure in the battery pack 10 and the external environment can be ensured, and further, the occurrence of explosion accidents caused by the excessive pressure in the battery pack 10 can be prevented.
The pressure relief valve herein may also be a pressure relief valve conventional in the art and is not limited herein.
Optionally, the first predetermined temperature threshold is smaller than the second temperature threshold, when the temperature in the battery accommodating cavity 81 is greater than or equal to the first predetermined temperature threshold, the first predetermined temperature threshold may be 30-48 ℃, and when the temperature in the battery accommodating cavity 81 is smaller than the second temperature threshold, the first heat absorbing material is heated to generate gas, the pressure in the battery accommodating cavity 81 is increased, so that the elasticity 5 expands towards the buffer cavity 82, the temperature of the buffer cavity 82 is increased, the temperature of the buffer cavity 82 can be reduced through heat exchange between the outer cover plate 6 and the outside air, and then the first heat absorbing material returns to the initial state, and the process does not have the second heat absorbing material to work.
In addition, when the temperature in the battery accommodating cavity is higher than a second preset temperature threshold value, the second preset temperature threshold value can be 49-85 ℃, the first heat absorbing material and the second heat absorbing material are heated to generate gas, the pressure in the battery accommodating cavity 81 is increased to enable the elastic membrane 5 to expand towards the buffer cavity 82, the temperature of the buffer cavity 82 is increased, the second heat absorbing material is heated to generate gas, the second heat absorbing material exchanges heat with the outside air through the outer cover plate 6 to reduce the temperature of the buffer cavity 82, then the first heat absorbing material and the second heat absorbing material return to the initial state, and the second heat absorbing material works in the process.
Further, the second preset temperature threshold is smaller than the third preset temperature threshold, when the temperature in the battery accommodating cavity 81 is larger than the third preset temperature threshold, the third preset temperature threshold can be larger than or equal to 86 ℃, the first heat absorbing material and the second heat absorbing material are heated to generate gas, at this moment, the temperature in the shell 8 cannot be controlled only through heat exchange between the outer cover plate 6 and the outside air, a large amount of gas causes the pressure in the battery accommodating cavity 81 and the buffer cavity 82 to increase, the pressure release valve on the outer cover plate 6 is opened, the elastic membrane 5 is broken, the second heat absorbing material flows into the battery accommodating cavity 81 to extinguish fire, and the use safety of the battery pack 10 can be ensured.
Further, as shown in fig. 3, the outer cover plate may include: the battery pack 10 comprises a body part 62 and a pressure relief part 63, wherein the pressure relief part 63 is connected with the body part 62, and when the temperature in the battery pack 10 reaches a third preset temperature threshold value, the pressure relief part 63 is separated from the body part 62 or is broken, so that the pressure relief effect can be realized, and further, the battery pack 10 can be prevented from being exploded in the using process.
Specifically, as shown in fig. 3, the thickness of the relief portion 63 is smaller than that of the body portion 62, for example: the thickness of this somatic part 62 can be more than or equal to the thickness of twice relief pressure portion 63, and the ability that this somatic part 62 bore pressure is stronger than the ability that relief pressure portion 63 bore pressure, and when battery package 10 internal pressure reached the predetermined value, relief pressure portion 63 can not bear the pressure this moment and break or separate with this somatic part 62, from this, so set up can guarantee that relief pressure portion 63 satisfies the working requirement better to can guarantee the smooth completion of the pressure release work of battery package 10. The pressure relief portion 63 may be made of the same material as the main body portion 62, or may be made of different materials, and the pressure relief portion 63 and the main body portion 62 may be configured to be depressible under a certain pressure by adopting a certain connection manner, so as to prevent danger.
Optionally, the main body 62 and the pressure relief portion 63 are welded, and when the pressure in the battery pack 10 reaches a predetermined value, the welded joint between the main body 62 and the pressure relief portion 63 will be cracked, so that the main body 62 and the pressure relief portion 63 are separated, thereby achieving the pressure relief operation, and further improving the operation safety of the battery pack 10. According to the vehicle of the embodiment of the invention, the battery pack 10 comprises the battery pack 10 of the embodiment, the battery pack 10 is arranged and installed on the vehicle, the battery pack 10 can increase the electric quantity of the battery pack 10, more electric energy can be provided for the vehicle, and therefore the running distance of the vehicle can be prolonged.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. A battery pack, comprising:
a housing, the interior of which is hollow;
the elastic membrane is arranged in the shell and divides the inner space of the shell into a battery accommodating cavity and a buffer cavity, and the buffer cavity is positioned at the upper part of the battery accommodating cavity;
the battery accommodating cavity is internally accommodated with a first heat-absorbing material, and the first heat-absorbing material is heated to generate gas at a first preset temperature valve value;
a battery located within the battery receiving cavity;
a second heat-absorbing material is accommodated in the buffer cavity and is heated to generate gas at a second preset temperature threshold;
the first preset temperature threshold is smaller than the second preset temperature threshold.
2. The battery pack of claim 1, wherein the first heat-absorbing material is heated to generate gas when the temperature in the battery receiving cavity is greater than or equal to the first preset temperature threshold;
and when the temperature in the battery accommodating cavity is greater than the second preset temperature threshold value, the first heat-absorbing material and the second heat-absorbing material are heated to generate gas.
3. The battery pack of claim 1, wherein the housing comprises: the elastic film is arranged in the tray, and a space below the elastic film in the tray is the battery accommodating cavity;
the outer cover plate is spaced from the elastic membrane and fixed with the tray, and the space defined by the tray, the outer cover plate and the elastic membrane is the buffer cavity.
4. The battery pack according to claim 3, wherein a pressure relief valve is provided on the outer cover plate, and the pressure relief valve is opened when the temperature in the battery pack reaches a third preset temperature threshold.
5. The battery pack of claim 4, wherein the second predetermined temperature threshold is less than the third predetermined temperature threshold;
when the temperature in the battery accommodating cavity is higher than a third preset temperature threshold value, the first heat-absorbing material and the second heat-absorbing material are heated to generate gas, and the pressure release valve on the outer cover plate is opened.
6. The battery pack of claim 3, wherein the outer cover plate comprises: the battery pack comprises a body part and a pressure relief part, wherein the pressure relief part is connected with the body part and is broken or separated from the body part when the temperature in the battery pack reaches a third preset temperature threshold value.
7. The battery pack of claim 6, wherein the relief portion has a thickness less than a thickness of the body portion.
8. The battery pack according to claim 6, wherein the body portion and the pressure relief portion are welded.
9. The battery pack of claim 1, wherein the second heat sink material is a fire retardant.
10. The battery pack of claim 3, wherein the outer cover plate is plugged on top of the tray.
11. The battery pack according to claim 10, wherein the outer cover plate is provided with a plug groove, the tray is provided with a plug connector, and a lower end surface of a portion of the plug groove located inside the plug connector abuts against the elastic film.
12. The battery pack according to claim 1, wherein the elastic membrane is provided at a lower portion thereof with a supporting member in a lattice shape for supporting the elastic membrane.
13. The battery pack of claim 1, wherein the battery includes a plurality of battery cells received within the battery receiving cavity, the first heat sink material being received between adjacent battery cells.
14. The battery pack of claim 13, further comprising: the heat dissipation members are arranged between two adjacent battery cells and/or on the outer side of the battery cell at one end.
15. The battery pack of claim 1, wherein the first heat sink material is a phase change material or a thermal oil.
16. A vehicle characterized by comprising a battery pack according to any one of claims 1-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711432882.9A CN109962190B (en) | 2017-12-26 | 2017-12-26 | Battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711432882.9A CN109962190B (en) | 2017-12-26 | 2017-12-26 | Battery pack and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109962190A CN109962190A (en) | 2019-07-02 |
| CN109962190B true CN109962190B (en) | 2021-03-26 |
Family
ID=67022054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711432882.9A Active CN109962190B (en) | 2017-12-26 | 2017-12-26 | Battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109962190B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725454B (en) * | 2020-06-12 | 2022-11-22 | 上汽通用汽车有限公司 | Battery module and battery pack assembly |
| CN112467266B (en) * | 2020-11-30 | 2023-12-19 | 惠州市恒泰科技股份有限公司 | Preparation method of steel shell button cell and steel shell button cell |
| CN112665678A (en) * | 2020-12-28 | 2021-04-16 | 湖北亿纬动力有限公司 | Battery gas production amount measuring device and battery gas production amount measuring method |
| CN114179639A (en) * | 2021-12-22 | 2022-03-15 | 镇江市高等专科学校 | Energy storage battery pack with heat radiation structure |
| CN114464918B (en) * | 2022-01-18 | 2023-11-14 | 苏州清陶新能源科技有限公司 | Battery pack |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101107731A (en) * | 2005-03-25 | 2008-01-16 | 株式会社Lg化学 | Small battery pack having frame retardant adhesive member |
| CN104009196A (en) * | 2013-02-26 | 2014-08-27 | 罗伯特·博世有限公司 | Equipment for protecting drain valve, support element, storage battery electric core, and storage battery |
| CN104241565A (en) * | 2014-07-30 | 2014-12-24 | 浙江超威创元实业有限公司 | Lithium battery provided with fire-proof and explosion-proof device and electric car adopting battery |
| CN105679976A (en) * | 2014-11-21 | 2016-06-15 | 北京长城华冠汽车科技有限公司 | Battery box |
| CN205985149U (en) * | 2016-07-29 | 2017-02-22 | 惠州比亚迪实业有限公司 | Compound explosion -proof valve, apron subassembly and battery |
| CN107078231A (en) * | 2014-05-21 | 2017-08-18 | 赛美西有限公司 | Passive isolated material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6073737B2 (en) * | 2013-04-24 | 2017-02-01 | 日立オートモティブシステムズ株式会社 | Power storage module |
-
2017
- 2017-12-26 CN CN201711432882.9A patent/CN109962190B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101107731A (en) * | 2005-03-25 | 2008-01-16 | 株式会社Lg化学 | Small battery pack having frame retardant adhesive member |
| CN104009196A (en) * | 2013-02-26 | 2014-08-27 | 罗伯特·博世有限公司 | Equipment for protecting drain valve, support element, storage battery electric core, and storage battery |
| CN107078231A (en) * | 2014-05-21 | 2017-08-18 | 赛美西有限公司 | Passive isolated material |
| CN104241565A (en) * | 2014-07-30 | 2014-12-24 | 浙江超威创元实业有限公司 | Lithium battery provided with fire-proof and explosion-proof device and electric car adopting battery |
| CN105679976A (en) * | 2014-11-21 | 2016-06-15 | 北京长城华冠汽车科技有限公司 | Battery box |
| CN205985149U (en) * | 2016-07-29 | 2017-02-22 | 惠州比亚迪实业有限公司 | Compound explosion -proof valve, apron subassembly and battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109962190A (en) | 2019-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109962190B (en) | Battery pack and vehicle | |
| US9689624B2 (en) | Method for mitigating thermal propagation of batteries using heat pipes | |
| CN106856230B (en) | battery module | |
| CN101523636B (en) | Battery pack and battery-mounted device | |
| US20170256831A1 (en) | Energy storage system | |
| CN107093686B (en) | Battery pack and vehicle | |
| CN108110381B (en) | Battery module and electric vehicle | |
| CN111386627A (en) | Partition member and battery pack | |
| CN112331990A (en) | Battery pack, vehicle and control method for relieving thermal runaway spread of battery pack | |
| CN111916596B (en) | Battery protection device | |
| JP7371239B2 (en) | A battery module including an absorbing member, a battery rack including the same, and a power storage system | |
| CN116845425A (en) | Liquid cooling battery pack and battery energy storage system | |
| CN112838294A (en) | Phase-change material, embedded cold-tube lithium battery, thermal management and runaway suppression system | |
| KR20210109315A (en) | Battery Pack, Battery Rack Comprising The Same, And Power Storage System | |
| CN113908471A (en) | Power battery device | |
| CN213989031U (en) | Spontaneous combustion preventing power lithium battery pack for vehicle | |
| US20220328896A1 (en) | Battery module having structure capable of rapid cooling, and ess comprising same | |
| CN113964422A (en) | Battery shell and square-shell battery | |
| CN216536635U (en) | Power battery device | |
| CN217246348U (en) | Battery pack | |
| CN220106666U (en) | Constant temperature battery pack | |
| CN221304914U (en) | Battery box and battery pack | |
| EP4336650A1 (en) | Battery pack with fire-fighting water storage tank | |
| CN219497923U (en) | Heat absorption subassembly, battery module, battery package and vehicle | |
| CN217062298U (en) | Structure for preventing battery from burning and lithium ion battery applying structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211208 Address after: 402761 No. 8, Hufeng Avenue, Qinggang street, Bishan District, Chongqing Patentee after: Chongqing Fudi Battery Research Institute Co.,Ltd. Address before: 518118 BYD Road, Pingshan New District, Shenzhen, Guangdong 3009 Patentee before: BYD Co.,Ltd. |
|
| TR01 | Transfer of patent right |