CN109962315B - Battery pack, vehicle and energy storage device - Google Patents
Battery pack, vehicle and energy storage device Download PDFInfo
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- CN109962315B CN109962315B CN201711418596.7A CN201711418596A CN109962315B CN 109962315 B CN109962315 B CN 109962315B CN 201711418596 A CN201711418596 A CN 201711418596A CN 109962315 B CN109962315 B CN 109962315B
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- battery
- battery pack
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- polymer film
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6572—Peltier elements or thermoelectric devices
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- 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
Abstract
The invention discloses a battery pack, a vehicle and an energy storage device, wherein the battery pack comprises a cover plate, a battery cabin body, a battery and a semiconductor refrigerating device, wherein the cover plate and the battery cabin body form a sealed space, and the battery is positioned in the sealed space; the semiconductor refrigerating device is located the apron and/or the battery cabin body, be equipped with the first, second current output terminal that are used for drawing electric current on the apron, semiconductor refrigerating device includes first, second electricity and connects, and first electricity connects and is connected with first current output terminal electricity, the apron below is equipped with electrically conductive deformation spare, electrically conductive deformation spare can make the second electricity connect and be connected with second current output terminal electricity under the effect that battery cabin body internal pressure increases when the battery generates heat, forms first current output terminal, second current output terminal and semiconductor refrigerating device return circuit. The battery pack provided by the invention reduces the complexity of a battery thermal management system, and has the advantages of simple structure, high heating and refrigerating efficiency and good safety performance.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a battery pack, a vehicle and an energy storage device.
Background
The existing battery energy storage device (such as a lithium ion battery) generally forms a module by connecting single batteries, namely battery cores in series and parallel, and the module finally forms an integral energy storage system with an active refrigeration control device by connecting the battery modules in series and parallel and combining a battery management system and other devices, so that sufficient power is provided for a motor. When the battery works, especially when the battery runs under a high multiplying power and an extreme environment, a large amount of heat can be generated, if the heat is not dissipated timely, the internal temperature of the battery can be increased, the internal pressure of the battery can be overhigh due to overhigh temperature, the electrochemical performance of the battery can be reduced, and the battery can be exploded, ignited and other safety accidents can be seriously caused. The existing battery cooling device is provided with a liquid cooling device and an air cooling device, the liquid cooling device and the air cooling device usually need complex pipelines, so that the design and the space stacking of products are difficult, the space is difficult to save, the pipelines change the sealing characteristic between a system cabin and the outside, once the pipelines are damaged, severe safety accidents (such as pipeline breakage, and outside rain and snow entering the cabin body) can occur in an extreme environment; no matter liquid cooling or air cooling is adopted, the pipeline parts in the cabin body are easy to form condensed water due to the temperature difference between the inside and the outside of the pipe wall, once the condensed water appears, the condensed water is difficult to discharge out of the cabin body, and the more the condensed water is accumulated, short circuit is easy to cause, and safety accidents are caused. In addition, these cooling devices are controlled by a Battery Management System (BMS), which is complicated and expensive in structure, and a problem in a certain place may not be able to cool the system, thereby causing a great safety problem.
Disclosure of Invention
The present invention is directed to an energy storage system with an active refrigeration control device to solve the above-mentioned problems.
In order to achieve the above object, the present invention provides a battery pack, which includes a cover plate, a battery compartment, a battery and a semiconductor refrigeration device, wherein the cover plate and the battery compartment form a sealed space, and the battery is located in the sealed space; the semiconductor refrigerating device is positioned on the cover plate and/or the battery cabin body and comprises a hot end and a cold end; the cold end is adjacent to the cell, and the hot end is used for heat dissipation; be equipped with the first current output terminal and the second current output terminal that are used for drawing electric current on the apron, semiconductor refrigerating plant includes that first electricity connects and the second electricity connects, and first electricity connects to be connected with first current output terminal electricity, the apron below is equipped with electrically conductive deformation spare, electrically conductive deformation spare can make second electricity connect and second current output terminal electricity to be connected under the effect that the battery cabin body internal pressure increases when the battery generates heat, forms first current output terminal, second current output terminal and semiconductor refrigerating plant return circuit.
Optionally, a first lug plate and a second lug plate are further arranged below the cover plate, and the first lug plate is electrically connected with a second electric connector; the second lug plate is electrically connected with a second current output terminal; the conductive deformation member is configured to electrically connect the first tab and the second tab when deformed.
Optionally, a conductive member electrically connected to the first tab is further disposed on the cover plate, and the conductive member penetrates through the cover plate; one end of the conductive piece extending out of the cover plate is electrically connected with the second electric connector.
Optionally, a conductive member is disposed adjacent to the second current output terminal.
Optionally, at least two of the first current output terminal, the second current output terminal and the conductive member are insulated and sealed from the cover plate.
Optionally, electrically conductive deformation piece is including the bellied deformation portion of below the effect that can increase in the battery cabin body pressure when the battery generates heat, the apron is provided with the recess for the apron lower surface indent corresponding to the position of deformation portion.
Optionally, the first wire connecting piece and the second wire connecting piece are respectively located at two sides of the groove and insulated from the cover plate.
Optionally, the first wire connecting piece and the second wire connecting piece are respectively attached to the lower surface of the cover plate through insulating pieces.
Optionally, an insulating layer is disposed in the groove.
Optionally, electrically conductive deformation spare is the sheetmetal, the sheetmetal is including can be when the battery generates heat the bellied deformation part of apron direction under the effect that the battery cabin internal pressure increases, the peripheral connection of sheetmetal on the battery cabin internal side wall and with battery cabin internal side wall, diapire between form the confined space who places the battery.
Optionally, the conductive deformation member is a metal sheet, and the metal sheet covers the battery compartment body.
Optionally, the conductive deformation member includes a first conductive sheet and an elastic component connected to the periphery of the first conductive sheet, and the first conductive sheet is connected to the inner side wall of the battery compartment through the elastic component and forms a sealed space for placing the battery with the inner side wall and the bottom wall of the battery compartment.
Optionally, the metal sheet or the elastic component is connected with the inner side wall of the battery cabin body in an insulating way.
Optionally, the conductive deformation member includes an elastic polymer film connected to the inner sidewall of the battery compartment and forming a sealed space for placing the battery between the inner sidewall and the bottom wall of the battery compartment, and a second conductive sheet located on the upper surface of the elastic polymer film.
Optionally, the conductive deformation component includes an elastic polymer film covering the battery compartment and a second conductive sheet located on the elastic polymer film.
Optionally, the second conductive sheet is adhered to the elastic polymer film.
Optionally, the periphery of the second conductive sheet is fixed on the elastic polymer film through a spring.
Optionally, the elastic polymer film is mounted on the inner side wall of the battery compartment through a mesh-shaped support member.
Optionally, the mesh-shaped supporting member is connected with the battery compartment in an insulating manner.
Optionally, the mesh support is selected from one or more of a ceramic mesh support, a plastic mesh support or an insulated metal mesh support.
Optionally, the elastic polymer film comprises an upper layer elastic polymer film and a lower layer elastic polymer film, the second conducting strip is located on the upper surface of the upper layer elastic polymer film, and a phase change material is further arranged between the upper layer elastic polymer film and the lower layer elastic polymer film.
Optionally, the phase change material is a fire extinguishing fluid.
Optionally, the phase change material is perfluorohexane.
Optionally, a heat sink is disposed at a hot end side of the semiconductor refrigeration device.
Optionally, the heat dissipation device is an air cooling device and/or a liquid cooling device.
Optionally, the battery compartment body includes an inner battery compartment body and an outer battery compartment body located outside the inner battery compartment body, and the semiconductor refrigeration device is located between the inner battery compartment body and the outer battery compartment body.
Optionally, the battery pack further includes a battery thermal management system, the battery thermal management system is electrically connected to the semiconductor refrigeration device, and the battery thermal management system can control the semiconductor refrigeration device.
Optionally, a current limiting and/or voltage limiting device is further connected in series between the first electrical connector and the first current output terminal.
Optionally, a medium is further filled in the battery compartment, and the medium is selected from one or more of liquid silicone oil, a phase change material, or an inert gas.
A second object of the present invention is to provide a vehicle including the battery pack described above.
A third object of the present invention is to provide an energy storage device, including the above battery pack.
Compared with the prior art, the invention has the beneficial effects that: when the battery pack works, a battery in the battery cabin generates heat due to power supply, air in the battery cabin expands due to heating, the pressure of a sealed space becomes large, the conductive deformation piece deforms to enable the semiconductor refrigerating device, the first current output terminal and the second current output terminal to form a loop, the semiconductor refrigerating device works, the cold end of the semiconductor refrigerating device refrigerates and absorbs heat in the battery cabin body to transfer to the hot end of the semiconductor, the heat radiating device is particularly and preferably arranged on the hot end side for quickly radiating heat at the hot end, when the temperature in the battery reaches balance, the conductive deformation piece breaks the loop according to the principle of thermal expansion and cold contraction to stop refrigerating, meanwhile, the semiconductor refrigerating loop and the battery are in a parallel connection state due to the fact that the semiconductor refrigerating loop and the battery are charged and discharged under high pressure, the effect of shunting can be achieved after the loop is connected, and damage of large current to the battery pack under the extreme condition is reduced, and meanwhile, the refrigeration is realized, and the flow division is also considered. Meanwhile, the specific structure of the invention can adopt the elastic polymer film and the second conducting strip positioned on the elastic polymer film as the conductive deformation part, the conduction of the semiconductor refrigeration loop can be better realized by means of the deformation of the elastic polymer film, the elastic polymer film can also be arranged into a double-layer structure, the phase-change material is added between the two layers, when the internal temperature of the battery cabin body exceeds a certain value and influences the service performance of the battery, the filler in the cabin does not expand or the expansion is not obvious, the temperature reaches the vaporization point of the phase-change material, the elastic polymer film can also be caused to deform to push the conductive deformation part to be communicated with the semiconductor refrigeration loop to realize refrigeration, if the selected phase-change material can extinguish fire, such as perfluorohexane, in extreme conditions, such as the battery catches fire, and the elastic polymer film is damaged, the phase-change material flows into the interior of the battery compartment body, so that early fire extinguishment can be realized, and more severe safety accidents caused by out-of-control battery can be prevented. The battery heat management system collects temperature signals and controls to start the semiconductor refrigerating device under the condition that the temperature of the external environment of the battery pack is low, so that the semiconductor refrigerating/heating end is switched, and the battery pack is heated.
Compared with the existing battery pack with a wind cooling and liquid cooling heat management system, the battery pack provided by the invention does not need complex pipelines, is simple in structure, good in battery sealing performance and higher in refrigeration and heating efficiency, can realize refrigeration even if the battery heat management system is damaged, and realizes dynamic refrigeration protection, thereby doubly improving the safety performance of the battery pack.
Drawings
Fig. 1 is a sectional view of a battery pack according to embodiment 1 of the present invention;
fig. 2 is a sectional view of a battery pack according to embodiment 2 of the present invention;
fig. 3 is a sectional view of a battery pack according to embodiment 3 of the present invention;
fig. 4 is a sectional view of a battery pack according to embodiment 4 of the present invention;
fig. 5 is a sectional view of a battery pack according to embodiment 5 of the present invention;
fig. 6 is a sectional view of a battery pack according to embodiment 6 of the present invention;
in the figure: 1. the battery comprises a positive terminal, 2, a negative terminal, 3, a cover plate, 4, a battery cabin body, 5, a semiconductor refrigerating device, 6, a heat radiating device, 7, a conductive piece, 8, a first wiring piece, 9, a second wiring piece, 10, a conductive deformation piece, 11, a semiconductor refrigerating circuit, 12, a spring, 13, an elastic polymer film, 131, an upper layer elastic polymer film, 132, a lower layer elastic polymer film, 14, a net-shaped supporting piece, 15, a cavity, 16, a groove, 17 and an insulating piece.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" is generally defined with reference to the drawing plane directions of the respective drawings, and "inner and outer" refer to the inner and outer of the respective component outlines.
The invention provides a battery pack, which comprises a cover plate, a battery cabin body, a battery and a semiconductor refrigerating device, wherein the cover plate and the battery cabin body form a sealed space, and the battery is positioned in the sealed space; the semiconductor refrigerating device is positioned on the cover plate and/or the battery compartment body and comprises a hot end and a cold end; the cold end is adjacent to the cell, and the hot end is used for heat dissipation; be equipped with the first current output terminal and the second current output terminal that are used for drawing electric current on the apron, semiconductor refrigerating plant includes first electricity and connects with the second electricity, and first electricity connects to be connected with first current output terminal electricity, the apron below is equipped with electrically conductive deformation spare, electrically conductive deformation spare can make the second electricity connect with second current output terminal electricity under the effect that the battery cabin body internal pressure increases when the battery generates heat and is connected, forms first current output terminal, second current output terminal and semiconductor refrigerating plant return circuit.
The cover plate is not limited in the present invention, and may be a cover plate conventional in the art, for example, a conductive metal cover plate, or an insulating plastic cover plate. The cover plate is provided with a first current output terminal and a second current output terminal for leading out current, the first current output terminal and the second current output terminal are used for outputting the current inside the battery pack and generally comprise a positive terminal and a negative terminal, the first current output terminal can be a positive terminal or a negative terminal, and correspondingly, when the first current output terminal is the positive terminal, the second current output terminal is the negative terminal; when the first current output terminal is a negative terminal, the second current output terminal is a positive terminal. The number of the first current output terminal and the second current output terminal is not limited in the present invention, and may be one or more.
The battery compartment is not limited in the present invention, and may be a battery compartment that is conventional in the art, for example, a conductive metal battery compartment, or an insulating plastic battery compartment. The shape of the metal battery compartment is not limited, and may be, for example, a conventional automobile tray shape, or a battery cabinet shape for energy storage. The battery compartment body can be of a single-layer structure or a multi-layer structure, and the battery compartment body is preferably of a multi-layer structure, namely the battery compartment body comprises an inner battery compartment body and an outer battery compartment body positioned outside the inner battery compartment body. The semiconductor refrigerating device is positioned between the inner battery chamber body and the outer battery chamber body. This allows the semiconductor refrigeration unit to be protected from interference with the various structures and components inside the battery compartment, as well as from interference from circuitry outside the battery compartment.
The battery cabin body can be filled with a medium, and the medium can be one or more selected from liquid silicone oil, phase-change materials or inert gases, so that the induction of the conductive deformation component to the inside of the battery is facilitated.
The battery may be a single or a plurality of unit batteries, an assembled battery module, or a plurality of battery modules, etc., and the present invention is not limited thereto.
The semiconductor refrigeration device is located on the cover plate and/or the battery compartment body, that is, may be located on the cover plate, may be located on the battery compartment body, may be located on the inner surface and the outer surface, or may be embedded inside, for example, it may be preferable that the semiconductor refrigeration device is located between the inner battery compartment body and the outer battery compartment body of the double-layer battery compartment body.
The semiconductor refrigerating device comprises a hot end and a cold end; the cold end is used for absorbing heat, the hot end is used for radiating heat, the cold end is close to the battery in the battery cabin body generally and is used for absorbing the heat emitted by the battery, the hot end is far away from the battery generally and is used for emitting the absorbed heat to the outside of the battery, if the semiconductor refrigerating device is positioned on the outer surface of the battery cabin body, the hot end can be exposed in the air, and the heat radiation is enhanced. Further preferably, a heat dissipation device is arranged on the hot end side of the semiconductor refrigeration device, heat dissipated from the hot end is dissipated through the heat dissipation device, and the heat dissipation device can be an air cooling device and/or a liquid cooling device and the like.
The semiconductor refrigerating device comprises a first electric connector and a second electric connector, wherein the first electric connector is electrically connected with a first current output terminal, a conductive deformation piece is arranged below a cover plate, and the second electric connector can be electrically connected with a second current output terminal under the action of pressure increase in a battery cabin when a battery generates heat, so that a first current output terminal, a second current output terminal and a semiconductor refrigerating device loop are formed. The semiconductor refrigeration device works, the cold end of the semiconductor refrigeration device refrigerates, and absorbs heat in the battery cabin body and transfers the heat to the hot end of the semiconductor, the hot end dissipates heat quickly, when the internal temperature of the battery reaches balance, the conductive deformation part breaks off a loop according to the principle of expansion with heat and contraction with cold, the refrigeration is stopped, meanwhile, the semiconductor refrigeration loop and the battery are charged and discharged at high voltage and are in a parallel state, and after the loop is connected, the semiconductor refrigeration loop can also play a shunting role, so that the damage of large current to the battery pack under extreme conditions is reduced, and the shunting is considered while the refrigeration.
The conductive deformation part of the invention is a part which is at least partially conductive and can deform due to pressure increase, as long as the loop of the semiconductor refrigeration part can be conducted, the conductive deformation part of the invention is preferably a deformable metal sheet, the shape and the material of the conductive deformation part are not required, for example, the conductive deformation part can be round copper, aluminum, lead and the like or alloy thereof, the conductive deformation part has a deformation part which can be protruded towards the cover plate direction under the action of pressure increase in the battery compartment when the battery generates heat, the periphery of the metal sheet is generally connected on the inner side wall of the battery compartment and forms a sealed space for placing the battery with the inner side wall and the bottom wall of the battery compartment, or the metal sheet is covered on the battery compartment and forms a sealed space with the battery compartment, and the pressure change in the battery can be rapidly sensed. Further preferably, the metal sheet is in insulation connection with the inner side wall of the battery compartment body, and the specific connection mode is not described herein again. Also can be preferred, electrically conductive deformation spare includes first conducting strip and the elastomeric element who is connected with first conducting strip periphery, first conducting strip pass through elastomeric element connect on the battery compartment body inside wall and with battery compartment body inside wall, diapire between form the sealed space of placing the battery, perhaps cover establish on the battery compartment body and form sealed space with the battery compartment body, can respond to the inside pressure variation of battery fast, through elastomeric element's deformation, promote the action of first conducting strip, elastomeric element also can adopt insulating connection with the battery compartment body inside wall. The invention can also preferably select, the conductive deformation piece comprises an elastic polymer film which is connected with the inner side wall of the battery cabin body and forms a sealed space for placing the battery with the inner side wall and the bottom wall of the battery cabin body, and a second conductive sheet which is positioned on the upper surface of the elastic polymer film, or the conductive deformation piece comprises the elastic polymer film which is covered on the battery cabin body and the second conductive sheet which is positioned on the elastic polymer film, the action of the second conductive sheet is pushed through the deformation of the elastic polymer film, and the second conductive sheet can be adhered to the elastic polymer film or can be fixed on the elastic polymer film through a spring at the periphery.
For the fixation of the elastic polymer film, the net-shaped supporting piece is arranged on the inner side wall of the battery cabin body to prevent the influence of the deformation of the elastic polymer film on the internal structure of the battery cabin body. Meanwhile, in order to prevent the conductive deformation piece from generating short circuit when the semiconductor refrigeration loop is conducted, the mesh-shaped supporting piece is in insulated connection with the inner side wall of the battery compartment or is made of an insulating material or is subjected to insulated treatment, preferably, the mesh-shaped supporting piece is selected from one or more of a ceramic mesh-shaped supporting piece, a plastic mesh-shaped supporting piece or an insulated metal mesh-shaped supporting piece. Elastic polymer film can design into monolayer or multilayer, and is preferred, designs elastic polymer film into bilayer structure, including upper elastic polymer film and lower floor's polymer film, and the second conducting strip is located upper polymer elastic film. Phase change material can be added between the upper and lower layer elastic polymer films, the phase change material is any one or more of high pressure resistance, insulation, non-combustion and non-promotion combustion, when the internal temperature of the battery compartment body exceeds a certain value and influences the use performance of the battery, the filler in the compartment does not begin to expand, or under the condition of unobvious expansion, the temperature reaches the vaporization point of the phase change material, and the elastic polymer film can also be caused to deform to push the conductive deformation sheet to be connected with the semiconductor refrigeration loop to realize refrigeration. Preferably, the phase change material is a fire extinguishing material, such as perfluorohexane. Under extreme conditions, such as battery ignition, after the elastic polymer film is damaged, the fire extinguishing agent flows into the interior of the battery compartment body, and early fire extinguishing can be realized.
Forming the first current output terminal, the second current output terminal and the semiconductor refrigeration device circuit by electrically connecting the second electrical connector with the second current output terminal can be realized by, but is not limited to, for example, a first lug plate and a second lug plate are further arranged below the cover plate, and the first lug plate is electrically connected with the second electrical connector; the second lug plate is electrically connected with a second current output terminal; the conductive deformation member is configured to electrically connect the first and second tabs when deformed, and is generally configured such that the deformation portion or the first and second conductive sheets are located below the aperture between the first and second tabs. First lug and second lug can and the apron between have certain distance, the deformation of the electrically conductive deformation piece of being convenient for, and can not contact with the apron after the deformation, can set up parts such as insulating part between first lug and second lug and apron. The first lug can be connected with the second electric connector through parts such as wires, if the wires are directly adopted for connection, preferably, the semiconductor refrigerating device is arranged on the inner surface of the battery cabin body, or the battery cabin body is a double-layer cavity body, the semiconductor refrigerating device is arranged between the double-layer cavity body, the first lug is positioned on the inner battery cabin body, the cover plate is used for sealing the outer battery cabin body, and the conductive deformation component is used for packaging the inner battery cabin body and the like. Preferably, be provided with the recess for the apron lower surface indent on the apron, the position of recess is preferred just to electrically conductive deformation piece epirelief switch on first lug with the position of second lug, preferably promptly, electrically conductive deformation piece is including the bellied deformation portion of cover plate direction under the effect that can the battery cabin internal pressure increases when the battery generates heat, the position that the apron corresponds to the deformation portion is provided with the recess for the apron lower surface indent. Namely the position of the cover plate corresponding to the gap between the first wire connecting piece and the second wire connecting piece. The cross section of the groove may be an arc shape or a suitable polygonal shape such as a rectangle, a square, or a pentagon, etc., and the present invention is not limited thereto, and an insulating layer is provided in the groove.
The first lug and the second lug are respectively positioned at two sides of the groove and are insulated from the cover plate, the first lug and the second lug which are optimized are respectively attached to the lower surface of the cover plate through the insulating parts, the shapes of the first lug and the second lug are not limited, for example, the first lug and the second lug can be arranged into a planar structure, and a protrusion bent towards the conductive deformation part can be arranged at one end of the conductive deformation part, which is electrically connected with the first lug and the second lug, so that the conductive deformation part is electrically connected with the first lug and the second electric connector.
The invention can be further optimized, the cover plate is also provided with a conductive piece electrically connected with the first lug plate, and the conductive piece penetrates through the cover plate; one end of the conductive piece extending out of the cover plate is electrically connected with the second electric connector. The semiconductor refrigerating device is positioned outside the battery cabin and can be connected with the conductive piece extending out of the cover plate through a lead. Further, the conductive member is disposed adjacent to the second current output terminal, so that the first and second connection lugs are conveniently disposed. The first current output terminal, the second current output terminal and the conductive member may be all insulated and sealed with the cover plate, or two of them may be insulated and sealed with the cover plate, that is, at least two of the first current output terminal, the second current output terminal and the conductive member are insulated and sealed with the cover plate.
The semiconductor refrigerating device works, the cold end of the semiconductor refrigerating device refrigerates and absorbs heat in the battery compartment body and transfers the heat to the hot end of the semiconductor, and the hot end of the semiconductor refrigerating device realizes quick heat dissipation by natural circulation of outside air. Preferably, a current limiting and voltage limiting device is further connected in series between the first electric connector and the first current output terminal of the semiconductor refrigeration device. The current and voltage limiting device is a resistor.
The battery pack of the present invention may further preferably include a battery thermal management system electrically connected to the semiconductor cooling device, and the battery thermal management system may control the semiconductor cooling device. When the battery pack is in the condition that the external environment temperature is low, the battery heat management system collects temperature signals and controls to start the semiconductor heater, so that the semiconductor refrigerating/heating end is switched, and the battery pack is heated.
The upper cover plate and the lower cabin body of the battery pack are connected in a sealing mode, so that the temperature change inside the lower cabin body is guaranteed, the temperature change can be better reflected on the volume change, once the temperature inside the system is changed, the volume of the filling material is expanded, the conductive deformation part is pushed to deform, and the semiconductor refrigeration loop is conducted to refrigerate.
The vehicle comprises the battery pack.
The energy storage device comprises the battery pack. The energy storage device can be a propulsion system energy storage device, an energy storage device of an energy storage power station and a communication base station, a portable electric tool and equipment and the like.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Like drawing edits throughout the specification refer to like constituent elements.
Example 1
This embodiment is mainly used for explaining a battery pack. Fig. 1 is a sectional view of a battery pack according to embodiment 1 of the present invention. Referring to fig. 1, the present invention provides a technical solution: the battery cooling device comprises a cover plate 3, a battery cabin body 4, a battery and a semiconductor refrigerating device 5, wherein the cover plate 3 and the battery cabin body 4 form a sealed space, the battery is located in the sealed space, the semiconductor refrigerating device 5 is located on the outer surface of the battery cabin body 4, the semiconductor refrigerating device 5 comprises a hot end and a cold end, the cold end is in contact with the outer surface of the battery cabin body, the hot end is tightly attached to a heat dissipation device 6, and the heat dissipation device 6 is an air cooling device. A positive terminal 1 and a negative terminal 2 for leading out current are arranged on the cover plate 3, a conductive piece 7 which penetrates through the cover plate 3 and is insulated and sealed with the cover plate 3 is also arranged, the conductive piece 7 is adjacent to the positive terminal 1 and is electrically connected with a first lug plate 8, the positive terminal 1 is electrically connected with a second lug plate 9, the first lug plate 8 and the second lug plate 9 are both positioned in a sealed space, the semiconductor refrigerating device 5 comprises a first electric connector and a second electric connector, the first electric connector is electrically connected with the negative terminal 2, the second electric connector is electrically connected with the conductive piece 7, the positive terminal 1, the negative terminal 2 and the cover plate 3 are insulated and sealed, a conductive deformation piece 10 is arranged below the first lug plate 8 and the second lug plate 9, the conductive deformation piece is a metal elastic piece, the metal elastic piece comprises a deformation part which is raised towards the cover plate direction under the action of pressure increase in the battery compartment when the battery generates heat, the periphery of the metal elastic piece is connected on the inner side wall of the battery compartment 4 and is connected with the inner side wall of the battery compartment 4, A sealed space for placing the battery is formed between the bottom walls. When the battery is heated, the internal temperature rises, under the action of pressure increase in the battery cabin 4, the metal elastic sheet deforms to protrude upwards and simultaneously contacts the first wiring sheet 8 and the second wiring sheet 9, so that the second electric connector of the semiconductor refrigerating device 5 is electrically connected with the positive terminal 1 to form the positive terminal 1, the negative terminal 2 and the semiconductor refrigerating circuit 11 of the semiconductor refrigerating device 5, the cold end of the semiconductor refrigerating device 5 refrigerates and absorbs heat in the battery cabin 4 and transfers the heat to the hot end of the semiconductor refrigerating device 5, the air cooling device accelerates the heat dissipation of the hot end to realize the refrigeration of the battery cabin 4, when the internal temperature of the battery reaches equilibrium, the metal elastic sheet disconnects the semiconductor refrigerating circuit 11 according to the principle of thermal expansion and cold contraction to stop the refrigeration, and simultaneously, because the semiconductor refrigerating circuit 11 and the high-voltage charge and discharge of the battery are in a parallel state, when the semiconductor refrigerating circuit 11 is conducted, the battery pack can also play a role in shunting, so that the damage of large current to the battery pack under extreme conditions is reduced, and shunting is considered while refrigeration is carried out.
Example 2
This embodiment is mainly for explaining a battery pack. Referring to fig. 2, the battery pack according to embodiment 2 has substantially the same structure as the battery pack of embodiment 1 except for the mounting member under the metal dome and the heat sink 6, and thus repeated descriptions of the same elements are omitted.
As shown in fig. 2, the heat dissipation device 6 is a liquid cooling device, an elastic polymer film 13 is disposed on one side of the metal elastic sheet facing the inside of the battery compartment according to embodiment 2, in order to prevent the elastic polymer film 13 from affecting the internal structure of the battery compartment 4 when deformed, a mesh support 14 is disposed under the surface of the metal elastic sheet facing away from the cover plate, the mesh support is a ceramic mesh support, the elastic polymer film 13 is mounted on the inner side wall of the battery compartment 4 through the ceramic mesh support and forms a sealed space for placing a battery with the inner side wall and the bottom wall of the battery compartment 4, in order to prevent a short circuit when the metal elastic sheet is conducted to the semiconductor refrigeration circuit 11, the connection between the ceramic mesh support and the wall of the battery compartment 4 is insulated, and the metal elastic sheet is connected to the elastic polymer film 13 through a spring 12.
When the battery is heated, the internal temperature rises, under the action of increasing the pressure in the battery cabin 4, the elastic polymer film 13 deforms to push the metal elastic sheet to simultaneously contact the first wiring sheet 8 and the second wiring sheet 9, so that the second electric connector of the semiconductor refrigerating device 5 is electrically connected with the positive terminal 1 to form the positive terminal 1, the negative terminal 2 and the semiconductor refrigerating circuit 11 of the semiconductor refrigerating device 5, the cold end of the semiconductor refrigerating device 5 refrigerates and absorbs the heat in the battery cabin 4 and transfers the heat to the hot end of the semiconductor refrigerating device 5, the liquid cooling device accelerates the heat dissipation of the hot end to realize the refrigeration of the battery cabin 4, when the internal temperature of the battery reaches balance, the metal elastic sheet disconnects the semiconductor refrigerating circuit 11 due to the principle of thermal expansion and cold contraction to stop the refrigeration, and simultaneously, because the semiconductor refrigerating circuit 11 and the high-voltage charge and discharge of the battery are in a parallel state, after the semiconductor refrigerating circuit 11 is conducted, the battery pack can also play a shunting role, the damage of large current to the battery pack under an extreme condition is reduced, and shunting is considered while refrigeration is carried out.
Example 3
This embodiment is mainly used for explaining a battery pack. Referring to fig. 3, the battery pack according to example 3 has substantially the same structure as the battery pack of example 2 except that the structure of the elastic polymer film and the conductive deformation member are different, and thus repeated descriptions of the same elements are omitted.
As shown in fig. 3, the elastic polymer film of example 3 has a double-layer structure, which is specifically divided into an upper layer elastic polymer film 131 and a lower layer elastic polymer film 132, perfluorohexane is added into a cavity 15 between the upper layer and the lower layer of the double-layer elastic polymer film, silicone oil is filled inside the battery compartment, and the conductive deformable component 10 is a lead metal elastic sheet here.
When the battery is heated, the internal temperature rises, when the internal temperature of the battery cabin body 4 exceeds a certain value and affects the service performance of the battery, the filler silicone oil in the cabin does not start to expand or expands insignificantly, the temperature reaches the vaporization point of perfluorohexane in the cavity 15 between the upper and lower layers of elastic polymer films, the elastic polymer films can also be caused to deform to push the lead metal elastic sheet to simultaneously contact the first wiring sheet 8 and the second wiring sheet 9, so that the second electric connector of the semiconductor refrigerating device 5 is electrically connected with the positive terminal 1 to form the positive terminal 1, the negative terminal 2 and the semiconductor refrigerating circuit 11 of the semiconductor refrigerating device 5, the cold end of the semiconductor refrigerating device 5 refrigerates and absorbs the heat in the battery cabin body and transfers the heat to the semiconductor hot end, the air cooling device accelerates the heat dissipation of the hot end to realize the refrigeration of the battery cabin body 4, when the internal temperature of the battery cabin 4 reaches equilibrium, the lead metal elastic sheet disconnects the semiconductor refrigeration loop 11 due to the principle of expansion with heat and contraction with cold, and stops refrigeration, and meanwhile, because the semiconductor refrigeration loop 11 and the battery are in a parallel state under high-voltage charge and discharge, the semiconductor refrigeration loop 11 can also play a role in shunting after being switched on, so that the damage of large current to the battery pack under extreme conditions is reduced, and the shunting is considered while refrigeration. If the battery catches fire, the fire damages the lower elastic polymer film 132 through the ceramic net-shaped supporting member, and the perfluorohexane flows into the battery compartment 4 to realize early fire extinguishing.
Example 4
This embodiment is mainly used for explaining a battery pack. Referring to fig. 4, the present invention provides a technical solution: the battery cooling device comprises a cover plate 3, a battery compartment body 4, a battery and a semiconductor cooling device 5, wherein the cover plate 3 and the battery compartment body 4 form a sealed space, the battery compartment body 4 is of a double-layer structure and specifically comprises an inner battery compartment body and an outer battery compartment body positioned outside the inner battery compartment body, the battery is positioned in the inner battery compartment body of the battery compartment body 4, the semiconductor cooling device 5 is positioned between the inner battery compartment body and the outer battery compartment body of the battery compartment body 4, the semiconductor cooling device 5 comprises a hot end and a cold end, the cold end is in contact with the surface of the battery compartment body in the battery compartment body 4, the hot end is tightly attached to a cooling device 6, and the cooling device 6 is an air cooling device. Be equipped with anodal terminal 1 and the negative terminal 2 that is used for drawing electric current on apron 3, apron 3 lower surface still includes recess 16 for the indent of apron 3 lower surface, first lug 8 and second lug 9, the inside insulating layer that is equipped with of recess 16, first lug 8, second lug 9 pastes through insulating part 17 and establishes the lower surface at apron 3 and first lug 8 and second lug 9 are located the both sides of recess 16 respectively, positive terminal 1 is connected to second lug 9 electricity, semiconductor refrigeration device 5 includes first electricity and second electricity, first lug 8 is connected to second electricity, negative terminal 2 is connected to first electricity, positive terminal 1, negative terminal 2 and apron 3 insulating seal, be equipped with electrically conductive deformation part 10 in first lug 8 and second lug below 9, electrically conductive deformation part here is the copper metal shell fragment, the copper metal shell fragment includes can be in the bellied internal pressure of apron direction under the effect that the battery cabin body increases when the battery generates heat The deformation part, the position of copper metal shell fragment deformation part corresponds to recess 16, and copper metal shell fragment periphery is connected on the battery compartment body 4 inside wall and forms the sealed space who places the battery with battery compartment body 4 inside wall, diapire.
When the battery is heated, the internal temperature rises, under the action of pressure increase in the battery cabin 4, the deformation part of the copper metal elastic sheet protrudes upwards and is electrically connected with the first lug 8 and the second lug 9, so that the second electric connector of the semiconductor refrigerating device 5 is electrically connected with the positive terminal 1 to form the positive terminal 1, the negative terminal 2 and the semiconductor refrigerating circuit 11 of the semiconductor refrigerating device 5, the cold end of the semiconductor refrigerating device 5 refrigerates and absorbs heat in the battery cabin 4 and transfers the heat to the hot end of the semiconductor refrigerating device 5, the air cooling device accelerates the heat dissipation of the hot end to realize the refrigeration of the battery cabin 4, when the internal temperature of the battery reaches equilibrium, according to the principle of thermal expansion and cold contraction, the copper metal elastic sheet disconnects the semiconductor refrigerating circuit 11 to stop the refrigeration, and simultaneously, because the semiconductor refrigerating circuit 11 and the battery are in a parallel connection state under high-pressure charge and discharge, the battery pack can also play a shunting role, the damage of large current to the battery pack under an extreme condition is reduced, and shunting is considered while refrigeration is carried out.
Example 5
This embodiment is mainly for explaining a battery pack. Referring to fig. 5, the battery pack of example 5 has substantially the same structure as the battery pack of example 4 except for the conductive deformation member 10 and the mounting members under the conductive deformation member 10 and the fillers of the battery compartment, and therefore, repeated descriptions of the same elements are omitted.
As shown in fig. 5, the conductive deformation element is an aluminum metal spring, and an elastic polymer film 13 is disposed on one side of the aluminum metal spring facing the interior of the battery compartment 4, so that the elastic polymer film 13 does not affect the interior structure of the battery compartment 4 when deforming, under its surface facing away from the cover plate, a mesh-like support 14 is provided, where the mesh-like support 14 is a plastic mesh-like support, the elastic polymer film 13 is arranged on the inner side wall of the battery cabin 4 through the plastic net-shaped supporting piece and forms a sealed space for placing the battery with the inner side wall and the bottom wall of the battery cabin 4, in order to prevent short circuit when the aluminum metal elastic sheet is conducted to the semiconductor refrigeration circuit 11, the connection part of the plastic net-shaped supporting piece and the wall of the battery cabin body 4 is insulated, the aluminum metal elastic sheet is connected to the elastic polymer film 13 through the spring 12, and the battery cabin body 4 is filled with the paraffin graphite composite phase change material.
When the battery is heated, the internal temperature rises, the paraffin graphite composite phase-change material in the battery compartment 4 expands due to heated volume, the pressure in the battery compartment 4 increases, the elastic high polymer film 13 deforms to push the aluminum metal shrapnel to be simultaneously and electrically connected with the first lug 8 and the second lug 9, so that the second electric connector of the semiconductor refrigerating device 5 is electrically connected with the positive terminal 1 to form the positive terminal 1, the negative terminal 2 and the semiconductor refrigerating circuit 11 of the semiconductor refrigerating device 5, the cold end of the semiconductor refrigerating device 5 refrigerates and absorbs the heat in the battery compartment 4 and transfers the heat to the hot end of the semiconductor refrigerating device 5, the air cooling device accelerates the heat dissipation of the hot end to realize the refrigeration of the battery compartment 4, when the internal temperature of the battery reaches the equilibrium, the aluminum metal shrapnel disconnects the semiconductor refrigerating circuit 11 due to the principle of heat shrinkage and stops the refrigeration, and simultaneously, because the semiconductor refrigerating circuit 11 and the battery are in a high-voltage charging and discharging parallel state, when the semiconductor refrigeration loop 11 is switched on, the effect of shunting can be achieved, damage of large current to the battery pack under extreme conditions is reduced, and shunting is considered while refrigeration is carried out.
Example 6
This embodiment is mainly used for explaining a battery pack. Referring to fig. 6, the battery pack of the present embodiment has substantially the same structure as the battery pack of embodiment 5 except that the structure of the elastic polymer film is different, and thus repeated descriptions of the same elements are omitted.
As shown in fig. 6, the elastic polymer film has a double-layer structure, which is specifically divided into an upper layer elastic polymer film 131 and a lower layer elastic polymer film 132, perfluorohexane is added into a cavity 15 between the upper layer and the lower layer of the double-layer elastic polymer film, and silicone oil is filled in the battery compartment.
When the battery is heated, the internal temperature rises, when the internal temperature of the battery compartment 4 exceeds a certain value and affects the service performance of the battery, the filler silicone oil in the compartment does not start to expand or expands insignificantly, the temperature reaches the vaporization point of perfluorohexane in the cavity 15 between the upper and lower elastic polymer films, the elastic polymer film 13 can also be caused to deform to push the aluminum metal elastic sheet to electrically connect the first connection sheet 8 and the second connection sheet 9, so that the second electric connection of the semiconductor refrigeration device 5 is electrically connected with the positive terminal 1 to form a semiconductor refrigeration loop 11 of the positive terminal 1, the negative terminal 2 and the semiconductor refrigeration device 10, the cold end of the semiconductor refrigeration device 5 refrigerates and absorbs the heat in the battery compartment 4 and transfers the heat to the hot end of the semiconductor refrigeration device 5, the air cooling device accelerates the heat dissipation of the hot end to realize the refrigeration of the battery compartment 4, when the internal temperature of the battery reaches equilibrium, the aluminum metal spring plate cuts off the semiconductor refrigeration loop 11 due to the principle of expansion with heat and contraction with cold, the refrigeration is stopped, meanwhile, because the semiconductor refrigeration loop 11 and the battery are in a parallel state (figure 2) under the high-voltage charge and discharge, after the semiconductor refrigeration loop 11 is switched on, the shunting effect can be achieved, the damage of large current to the battery pack under the extreme condition is reduced, and the shunting is considered while the refrigeration. If the battery catches fire, the fire damages the lower elastic polymer film 132 through the ceramic net-shaped supporting member, and the perfluorohexane flows into the battery compartment 4 to realize early fire extinguishing.
The battery pack described in the above embodiments can be used for both vehicles and energy storage devices, and the specific installation manner is the same as that in the prior art, and is not described herein again.
In the description of the present invention, it should be understood that the terms "length", "width", and the like indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (31)
1. The utility model provides a battery package, includes apron, battery cabin body, battery and semiconductor refrigerating plant which characterized in that:
the cover plate and the battery cabin form a sealed space, and the battery is positioned in the sealed space;
the semiconductor refrigerating device is positioned on the cover plate and/or the battery cabin body and comprises a hot end and a cold end; the cold end is adjacent to the cell, and the hot end is used for heat dissipation;
the semiconductor refrigeration device comprises a first electric connector and a second electric connector, the first electric connector is electrically connected with the first current output terminal, a conductive deformation piece is arranged below the cover plate, a first lug plate and a second lug plate are further arranged below the cover plate, and the first lug plate is electrically connected with the second electric connector; the second lug plate is electrically connected with a second current output terminal; the conductive deformation is located below an aperture between a first and a second lug, the conductive deformation configured to electrically connect the first and second lugs when deformed; the conductive deformation component can enable the second electric connector to be electrically connected with the second current output terminal under the action of pressure increase in the battery cabin when the battery generates heat, so that a first current output terminal, a second current output terminal and a semiconductor refrigerating device loop are formed; the conductive deformation member is a member which is at least partially conductive and can be deformed by pressure increase.
2. The battery pack as claimed in claim 1, wherein the cover plate is further provided with a conductive member electrically connected to the first tab, the conductive member penetrating the cover plate; one end of the conductive piece extending out of the cover plate is electrically connected with the second electric connector.
3. The battery pack according to claim 2, wherein the conductive member is disposed adjacent to the second current output terminal.
4. The battery pack of claim 2, wherein at least two of the first current output terminal, the second current output terminal and the conductive member are hermetically sealed with the cap plate.
5. The battery pack according to claim 1, wherein: electrically conductive deformation spare is including the bellied deformation portion of apron direction under the effect that can increase in the internal pressure of battery cabin when the battery generates heat, the apron is provided with for the recess of apron lower surface indent corresponding to the position of deformation portion.
6. The battery pack according to claim 5, wherein: the first wiring sheet and the second wiring sheet are respectively positioned on two sides of the groove and are insulated from the cover plate.
7. The battery pack according to claim 6, wherein: the first lug plate and the second lug plate are respectively attached to the lower surface of the cover plate through insulating pieces.
8. The battery pack according to any one of claims 5, 6, or 7, wherein: an insulating layer is arranged in the groove.
9. The battery pack according to claim 1, wherein: the electrically conductive deformation piece is the sheetmetal, the sheetmetal is including can be when the battery generates heat under the effect that the internal pressure of battery compartment increases to the bellied deformation portion of apron direction, the peripheral connection of sheetmetal on the internal side wall of battery compartment and with battery compartment internal side wall, diapire between form the confined space who places the battery.
10. The battery pack according to claim 1, wherein: the conductive deformation part is a metal sheet, and the metal sheet covers the battery cabin body.
11. The battery pack according to claim 1, wherein: the conductive deformation part comprises a first conductive sheet and an elastic component connected with the periphery of the first conductive sheet, and the first conductive sheet is connected to the inner side wall of the battery compartment body through the elastic component and forms a sealed space for placing a battery with the inner side wall and the bottom wall of the battery compartment body.
12. The battery pack according to claim 9, wherein: the metal sheet is connected with the inner side wall of the battery cabin body in an insulating mode.
13. The battery pack according to claim 11, wherein: the elastic component is connected with the inner side wall of the battery cabin body in an insulating way.
14. The battery pack according to claim 1, wherein: the conductive deformation piece comprises an elastic polymer film which is connected with the inner side wall of the battery compartment body and forms a sealed space for placing the battery with the inner side wall and the bottom wall of the battery compartment body and a second conductive sheet which is positioned on the upper surface of the elastic polymer film.
15. The battery pack according to claim 1, wherein: the conductive deformation piece comprises an elastic polymer film covering the battery compartment body and a second conductive sheet positioned on the elastic polymer film.
16. The battery pack according to any one of claims 14 or 15, wherein: the second conducting strip is adhered to the elastic polymer film.
17. The battery pack according to any one of claims 14 or 15, wherein: the periphery of the second conducting strip is fixed on the elastic polymer film through a spring.
18. The battery pack according to any one of claims 14 or 15, wherein the elastic polymer film is mounted on the inner side wall of the battery compartment by a net-shaped support.
19. The battery pack of claim 18, wherein the mesh support is in insulating connection with the battery compartment.
20. A battery pack, as recited in claim 19, wherein: the reticular support member is one or more selected from ceramic reticular support member, plastic reticular support member or insulating treated metal reticular support member.
21. The battery pack according to claim 14 or 15, wherein the elastic polymer films comprise an upper elastic polymer film and a lower elastic polymer film, the second conductive sheet is located on the upper surface of the upper elastic polymer film, and a phase change material is further disposed between the upper elastic polymer film and the lower elastic polymer film.
22. The battery pack of claim 21, wherein the phase change material is a fire extinguishing fluid.
23. A battery pack, as recited in claim 22, wherein said phase change material is perfluorohexane.
24. The battery pack according to claim 1, wherein the semiconductor cooling device is provided with a heat sink on a hot side thereof.
25. The battery pack of claim 24, wherein the heat sink is an air-cooled device and/or a liquid-cooled device.
26. The battery pack of claim 1, wherein the battery compartments comprise an inner battery compartment and an outer battery compartment located outside the inner battery compartment, and the semiconductor refrigeration device is located between the inner battery compartment and the outer battery compartment.
27. The battery pack of claim 1, further comprising a battery thermal management system electrically connected to the semiconductor cooling device, the battery thermal management system being capable of controlling the semiconductor cooling device.
28. A battery pack, as claimed in claim 1, wherein current and/or voltage limiting means are also connected in series between said first electrical connector and said first current output terminal.
29. The battery pack according to claim 1, wherein the battery compartment is further filled with a medium, and the medium is selected from one or more of liquid silicone oil, a phase change material and an inert gas.
30. A vehicle comprising the battery pack of any one of claims 1-29.
31. An energy storage device comprising the battery pack of any one of claims 1-29.
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| CN201711418596.7A CN109962315B (en) | 2017-12-25 | 2017-12-25 | Battery pack, vehicle and energy storage device |
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| CN201711418596.7A CN109962315B (en) | 2017-12-25 | 2017-12-25 | Battery pack, vehicle and energy storage device |
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| CN110336096A (en) * | 2019-07-31 | 2019-10-15 | 上海马勒热系统有限公司 | Batteries of electric automobile cooling system based on semiconductor heat power technology |
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