CN113117274A - Cooling system for battery pack - Google Patents
Cooling system for battery pack Download PDFInfo
- Publication number
- CN113117274A CN113117274A CN202110385259.2A CN202110385259A CN113117274A CN 113117274 A CN113117274 A CN 113117274A CN 202110385259 A CN202110385259 A CN 202110385259A CN 113117274 A CN113117274 A CN 113117274A
- Authority
- CN
- China
- Prior art keywords
- cooling
- pipe
- battery
- storage tank
- cooling system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 111
- 239000000110 cooling liquid Substances 0.000 claims abstract description 45
- 239000007921 spray Substances 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000002826 coolant Substances 0.000 claims description 50
- 239000007788 liquid Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 17
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000008266 hair spray Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
- A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0072—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using sprayed or atomised water
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a cooling system for a battery pack, which comprises a cooling liquid storage tank arranged outside a battery pack box body, a temperature sensor used for monitoring the temperature of the battery pack and a battery management controller connected with the temperature sensor, wherein the cooling liquid storage tank is arranged outside the battery pack box body; the cooling liquid storage tank is connected with a first cooling pipeline and a second cooling pipeline; the first cooling pipeline is a circulating pipeline and comprises a first branch pipe, a circulating pump, a heat exchanger, a first branch pipe and a main pipe which are connected in series, the heat exchanger is positioned on one side of the battery cell, and the heat exchanger is configured to exchange heat with the battery cell; the second cooling pipeline comprises a main pipe, a second branch pipe and a spray pipe which are connected in series; wherein the first and second branches are each in communication with the manifold, the desuperheating system being configured to activate the second cooling circuit when the temperature sensor reaches a predetermined condition.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a cooling system for a battery pack.
Background
With the development of the new energy automobile industry, the battery safety problem is more and more emphasized. Because a large amount of high-temperature gas is generated in the charge and discharge process of the battery core, the internal pressure of the battery box body is increased sharply; the high-temperature gas can heat the peripheral electric cores of the battery cells, so that the phenomenon of thermal runaway of the peripheral electric cores occurs; and can also cause the burning and explosion of the battery core inside the box body. Therefore, when the electric core in the battery box body generates thermal runaway and combustion, the battery is timely cooled to reduce damage.
Because electric core is located inside the battery box, generally adopt recirculated cooling liquid to cool down to electric core. When the battery cell is out of control due to heat, the battery cell can be burnt due to the rise of the temperature of the battery cell, external oxygen is not needed for the burning of the battery cell, and the positive and negative short circuits of the battery cell release huge energy along with the damage of an internal structure, so that the burning is facilitated; therefore, if the battery core is not cooled down quickly in time, fire will be generated, and safety accidents are caused. The existing cooling liquid circulating structure is difficult to effectively realize the rapid cooling of the battery core. And at present, the electric core is generally put out a fire by installing an electronic fire extinguisher in the battery pack. However, the electronic fire extinguisher has a good fire extinguishing effect on other parts in the battery pack except the battery core, but the fire extinguishing capability of the burning battery core is weak, so that the time taken by the battery core for fire extinguishing or cooling is prolonged, and peripheral battery cores are even ignited. Therefore, how to rapidly extinguish and cool the fire of the burning single battery cell is an urgent technical problem to be solved.
Disclosure of Invention
Accordingly, the present invention is directed to a cooling system for a battery pack to solve one or more of the problems of the prior art.
According to one aspect of the invention, the invention discloses a cooling system for a battery pack, which comprises a cooling liquid storage tank arranged outside a battery pack box body, a temperature sensor used for monitoring the temperature of the battery pack and a battery management controller connected with the temperature sensor;
the cooling liquid storage tank is connected with a first cooling pipeline and a second cooling pipeline;
the first cooling pipeline is a circulating pipeline and comprises a first branch pipe, a circulating pump, a heat exchanger, a first branch pipe and a main pipe which are connected in series, the heat exchanger is positioned on one side of the battery cell, and the heat exchanger is configured to exchange heat with the battery cell;
the second cooling pipeline comprises a main pipe, a second branch pipe and a spray pipe which are connected in series;
wherein the first and second branches are each in communication with the manifold, the desuperheating system being configured to activate the second cooling circuit when the temperature sensor reaches a predetermined condition.
In some embodiments of the present invention, one end of the spray pipe is closed, and the other end of the spray pipe is connected to one end of the second branch pipe, which is away from the main pipe, and the spray pipe is provided with a plurality of spray openings corresponding to the battery cells and opened under a predetermined condition.
In some embodiments of the present invention, the eruption port is a weak point of the wall of the shower pipe, and the material of the eruption port of the shower pipe is a material which is easily broken at a predetermined temperature and/or a predetermined pressure.
In some embodiments of the invention, the weak point is a concave point having a wall thickness less than the wall thickness of the pipe around it.
In some embodiments of the present invention, in the working state of the first cooling pipeline, the refrigerant fluid flows through the first branch pipe, the circulation pump, the heat exchanger, the first branch pipe and the main pipe in sequence;
and under the working state of the second cooling pipeline, the refrigerant liquid sequentially flows through the main pipe, the second branch pipe and the spray pipe.
In some embodiments of the present invention, the temperature reduction system is further provided with a quick replacement device connected to the coolant storage tank and used for quickly discharging the coolant in the coolant storage tank in the second cooling circuit working state.
In some embodiments of the invention, the rapid replacement device is a high pressure gas tank.
In some embodiments of the present invention, a control valve is disposed between the rapid replacement device and the coolant storage tank, and the control valve is further used for communicating the battery management controller with the rapid replacement device.
In some embodiments of the invention, the sensor is at least one of a smoke sensor, a voltage detection sensor and an infrared sensor.
In some embodiments of the present invention, the number of the battery cells is multiple, the number of the burst openings is the same as the number of the battery cells, and the multiple burst openings correspond to the positions of the safety valve outlets of the multiple battery cells one to one.
In the cooling system for the battery pack in the embodiment of the invention, the cooling liquid storage tank is connected with the first cooling pipeline and the second cooling pipeline, the first branch pipe in the first cooling pipeline and the second branch pipe in the second cooling pipeline are both communicated with the header pipe, the header pipe can be used as a return pipe of the first cooling pipeline and also can be used as an outlet pipe of the second cooling pipeline, and the cooling system is configured to activate the second cooling pipeline when the temperature sensor reaches a preset condition; through the setting of above-mentioned structure for coolant liquid in the coolant liquid bin can play rapid cooling effect to electric core, also can play the effect of putting out a fire fast, consequently can guarantee this cooling system and continuously carry out rapid cooling and put out a fire fast to the electric core of catching fire in a period, has avoided the battery to catch fire and has taken place thermal expansion to other electric cores.
In addition, set up the shower in the relief valve outlet side of electric core, and the shower still have the easy weak point of being torn under predetermined temperature and predetermined pressure with the corresponding position department of electric core relief valve, so that when the sensor detects that electric core thermal runaway phenomenon appears, the pressure increase in the coolant liquid bin is so that highly compressed coolant liquid break through the shower with catch fire the corresponding weak point of the relief valve of electric core, thereby accurate spray the coolant liquid to catching fire electric core, thereby further realized catching fire the quick fire extinguishing of electric core, thereby ensure to prevent that its peripheral electric core from being ignited and catching fire electric core secondary reburning.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For purposes of illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary apparatus actually manufactured according to the present invention. In the drawings:
fig. 1 is a schematic structural diagram of a cooling pipeline of a cooling system for a battery pack according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a cooling system for a battery pack according to another embodiment of the present invention.
Fig. 3 is a front view of the shower pipe of the cooling system for a battery pack shown in fig. 2.
Fig. 4 is an enlarged view of a point a shown in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
It should be emphasized that the term "comprises/comprising/comprises/having" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It should be noted that the terms of orientation and orientation used in the present specification are relative to the position and orientation shown in the drawings; the term "coupled" herein may mean not only directly coupled, but also indirectly coupled, in which case intermediates may be present, if not specifically stated. A direct connection is one in which two elements are connected without the aid of intermediate elements, and an indirect connection is one in which two elements are connected with the aid of other elements.
At present, a battery pack with a cooling system generally has a cooling liquid storage box arranged outside a battery pack box body, a liquid cooling plate capable of carrying out heat exchange with a battery core is arranged inside the battery pack box body, and the heat of the battery core is taken away by refrigerating liquid flowing through the liquid cooling plate in a circulating manner, so that the battery core is cooled. Although the cooling mode cools the battery core to a certain extent, when the battery core generates thermal runaway and catches fire or the temperature sharply rises, the cooling speed of the currently and generally adopted cooling mode is slow, and the requirement of rapid cooling is difficult to meet.
The invention discloses a cooling system for a battery pack, which aims to quickly extinguish a fire of a burning single battery cell so as to avoid other battery cells around a fire-catching battery cell from being ignited or avoiding secondary reburning of the fire-catching battery cell after the fire-catching battery cell is extinguished. Second cooling line among this cooling system is in catching fire or under the thermal runaway state at the battery, but starting work to quick through shower spout to catching fire or thermal runaway electricity core of refrigerating fluid in the coolant liquid bin has not only realized the rapid cooling of electric core in the battery package, has still realized putting out a fire fast to burning monomer electric core.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, like reference characters designate the same or similar parts throughout the several views.
Fig. 1 is a schematic structural diagram of a cooling pipeline of a cooling system for a battery pack 01 according to an embodiment of the present invention, and as shown in fig. 1, the cooling system includes a coolant storage tank 60, a temperature sensor 20, and a battery management controller 30. Wherein the coolant storage tank 60 may be provided outside the battery pack 01; the temperature sensor 20 is used for monitoring the temperature of the battery pack 01, and can be specifically positioned outside or inside the box body 90 of the battery pack 01; and the battery management controller 30 is connected to the temperature sensor 20 and is configured to receive a temperature signal of the battery pack 01 monitored by the temperature sensor 20.
The coolant storage tank 60 is connected with a first cooling line and a second cooling line. The first cooling pipeline is a circulating pipeline, and the first cooling pipeline comprises a first branch pipe 71, a circulating pump 72, a heat exchanger 73, a first branch pipe 74 and a header pipe 80 which are connected in series, the heat exchanger 73 is located on one side of the battery cell, and the heat exchanger 73 is configured to exchange heat with the battery cell. The second cooling pipeline comprises a main pipe 80, a second branch pipe 81 and a spray pipe 10 which are connected in series; the spray pipe 10 may be specifically disposed inside the box 90 of the battery pack 01, and the spray pipe 10 is used to spray the cooling liquid to the battery cell. In addition, the first branch 74 and the second branch 81 are both in communication with the manifold 80, and the desuperheating system is configured to activate the second cooling circuit when the temperature sensor 20 reaches a predetermined condition, such that the manifold 80 can deliver the cooling fluid to the second branch 81 when the temperature sensor 20 reaches the predetermined condition.
In the above-described embodiment, the first branch 74 of the first cooling circuit and the second branch 81 of the second cooling circuit are both connected to the manifold 80; so that when the first cooling line is in operation, the manifold 80 acts as a return line to return the coolant flowing through the heat exchanger 73 to the coolant reservoir 60; and when the second cooling pipe is operated, the header pipe 80 serves as an outflow pipe, so that the coolant in the coolant storage tank 60 flows to the shower pipe 10 through the header pipe 80, and is sprayed to the electric core in which a fire or a thermal runaway occurs.
In one embodiment of the present invention, the first branch pipe 71, the circulation pump 72, the heat exchanger 73, the first branch pipe 74, and the header pipe 80 are connected in series in this order. At this time, one end of the first branch pipe 71 is connected to the liquid outlet of the coolant storage tank 60, the other end of the first branch pipe 71 is connected to the liquid inlet of the circulation pump 72, the liquid outlet of the circulation pump 72 is connected to the liquid inlet of the heat exchanger 73, the liquid outlet of the heat exchanger 73 is connected to one end of the first branch pipe 74, the other end of the first branch pipe 74 is connected to one end of the main pipe 80, and the other end of the main pipe 80 is connected to the liquid inlet of the coolant storage tank 60. Similarly, the header 80, the second branch 81, and the shower pipe 10 may be connected in series in this order. At this time, one end of the header pipe 80 except the end connected to the inlet of the coolant storage tank 60 is connected to one end of the second branch pipe 81, and the other end of the second branch pipe 81 is communicated with the shower pipe 10. It is to be understood that this embodiment is only one of many embodiments, and that other components may be added between any two components as desired; for example, a second branch pipe is added between the circulation pump 72 and the heat exchanger 73, and one end of the second branch pipe may be connected to the liquid outlet of the circulation pump 72, and the second end of the second branch pipe is connected to the liquid inlet of the heat exchanger 73. In this embodiment, the first branch pipe 74 and the second branch pipe 81 are connected to the end of the manifold 80 away from the coolant storage tank 60, and a three-way valve may be installed at the end of the manifold 80.
Fig. 2 is a schematic structural view illustrating a cooling system for a battery pack 01 according to another embodiment of the present invention, and as shown in fig. 2, the cooling system for a battery pack 01 includes a coolant storage tank 60, a temperature sensor 20, a battery management controller 30, a quick replacement device, and a first cooling line and a second cooling line connected to the coolant storage tank 60.
The temperature sensor 20 is configured to monitor a thermal runaway state of the battery cell in the box 90 of the battery pack 01, and convert the received running state information of the battery cell into an electrical signal or information in other forms for output; which is located within a cavity of the case 90 of the battery pack 01, and which may be fixed, in particular, to a side wall or a top wall of the case 90. The battery management controller 30 is electrically connected with the temperature sensor 20, and the battery management controller 30 is specifically arranged outside the box body 90 and is used for receiving a detection signal of the temperature sensor 20 and judging a thermal runaway state of the battery core; illustratively, the battery management controller 30 and the temperature sensor 20 may be connected by a signal line to realize transmission of an electrical signal. The thermal runaway state of the cell comprises a fire state of the cell. The rapid replacement device may be specifically a high pressure gas tank 50, and the high pressure gas tank 50 is disposed outside the box 90 of the battery pack 01, and the gas outlet thereof is communicated with the coolant storage tank 60, so that the battery management controller 30 can control it to deliver high pressure gas into the coolant storage tank 60. The liquid inlet of the spray pipe 10 is communicated with the cooling liquid storage tank 60 through a second branch pipe 81 and a main pipe 80, and the spray pipe 10 is positioned on one side of the safety valve outlet of the battery cell. Specifically, one end of the shower pipe 10 is closed, and the other end is connected to an end of the second branch pipe 81 remote from the header pipe 80.
When the battery cell is out of control thermally or catches fire, in order to make the shower pipe 10 emit the cooling liquid to the battery cell which catches fire in an accurate orientation, a plurality of emitting openings which correspond to the battery cells and are opened under a preset condition are arranged on the shower pipe 10. Illustratively, the eruption is a weak point of the wall of the shower 10, and the material of the eruption of the shower 10 is a material that is susceptible to rupture at a predetermined temperature and/or a predetermined pressure. When the eruption is broken, a water jet is formed.
In this embodiment, if only the battery pack 01 is cooled, the first cooling pipeline is operated, and at this time, the refrigerant fluid flows through the first branch pipe 71, the circulation pump 72, the heat exchanger 73, the first branch pipe 74, and the header pipe 80 in this order; that is, the coolant in the coolant storage tank 60 flows out of the first branch pipe 71 and flows back from the manifold 80, thereby achieving the circulation of the coolant in the first cooling line. If the electric core in the battery pack 01 needs to be rapidly cooled or put out a fire, the second cooling pipeline works; at this time, the coolant in the coolant storage tank 60 flows out from the header pipe 80 and further flows into the shower pipe 10 through the second branch pipe 81, and is sprayed to the cells in the battery pack 01.
Further, the cooling system may also include a control valve for communicating the battery management controller 30 with the quick-replacement device. The quick replacement device is connected to the coolant storage tank 60 and is used for quickly discharging the coolant in the coolant storage tank 60 in the second cooling line operating state. Preferably, the quick-change device is a high pressure air reservoir 50. Illustratively, the control valve may also be located outside the housing and electrically connected to the battery management controller 30. The control valve receives a control signal sent by the battery management controller 30 and controls the valve body to open or close. The control valve further has an air inlet and an air outlet, the air inlet of the control valve is communicated with the air outlet of the high pressure air tank 50, and the air outlet of the control valve is communicated with the air inlet of the coolant storage tank 60, so that the connection between the battery management controller 30 and the high pressure air tank 50 is realized, and the connection between the high pressure air tank 50 and the coolant storage tank 60 is also realized. It should be understood that the quick-replacement device could be other types of gas generating devices with fire extinguishing materials in addition to the high pressure gas tank 50.
In this embodiment, when the battery cell in the box of the battery pack 01 is in a fire state, the battery management controller 30 receives a fire signal of the battery cell and determines whether the battery cell really fires; when the battery core is judged to be in fire, a control signal is sent to the control valve, so that the valve of the control valve is opened, and the high-pressure gas storage tank 50 is enabled to convey high-pressure gas into the cooling liquid storage tank 60. The cooling liquid storage tank 60 is filled with liquid capable of cooling or extinguishing fire for the battery core; when the control valve is opened, the high-pressure gas tank delivers high-pressure gas into the coolant storage tank 60, and the coolant in the coolant storage tank 60 is delivered to the shower pipe 10 under the pressure of the high-pressure gas.
The shower pipe 10 is preferably disposed on the outlet side of the safety valve of the battery cell, and a pipe wall of the shower pipe 10 has a weak point at a position corresponding to the safety valve of the battery cell, and the weak point may be torn at a predetermined temperature and/or a predetermined pressure. It should be understood that the predetermined temperature may be a temperature of a gas emitted by the cell thermal runaway, and the predetermined pressure may be a pressure of the gas emitted by the cell thermal runaway; in addition, when the thermal runaway occurs in the battery cell, the mechanical performance of the weak point corresponding to the battery cell is reduced due to the thermal runaway spraying effect of the battery cell, so that the weak point with the reduced mechanical performance on the spray pipe 10 can be torn by the high-pressure liquid due to the high-pressure liquid in the cooling liquid storage box 60, and the torn weak point serves as a water spray opening, so that the cooling liquid is further sprayed to the battery cell which catches fire through the water spray opening, and the accurate and quick fire extinguishing of the battery cell which catches fire is ensured. Therefore, the cooling system for the battery pack 01 in the embodiment of the invention ensures accurate fire extinguishing and rapid cooling of the battery cell in fire, so that the time required by the battery cell for fire extinguishing or cooling is reduced, and other battery cells around the battery cell in fire are prevented from being ignited.
Preferably, the heat exchanger 73 of the cooling system for the battery pack 01 is a liquid cooling plate, and a liquid outlet of the liquid cooling plate is communicated with a liquid inlet of the cooling liquid storage tank 60 through the first branch pipe 74 and the header pipe 80; in addition, since the end portion of the shower pipe 10 communicates with the coolant storage tank 60 via the second branch pipe 81 and the header pipe 80, the first branch pipe 74 communicates with the second branch pipe 81. As shown in fig. 1, the liquid cooling plate is located in the cavity of the case of the battery pack 01, and the circulation pump 72 is located outside the case. The liquid cooling plate can be placed close to the surface of the battery cell specifically so as to cool the battery cell. The inlet of the coolant storage tank 60 may specifically be located on a side wall or on a top wall of the coolant storage tank 60. The liquid inlet of the liquid cooling plate is communicated with the liquid outlet of the cooling liquid storage tank 60 through a circulating pump 72, so that the cooling liquid in the cooling liquid storage tank 60 can be conveyed to the liquid cooling plate; the outlet of the liquid cooling plate communicates with the inlet of the coolant reservoir 60 via the first branch pipe 74 and the header pipe 80. The liquid cooling plate can realize the circulating flow of the cooling liquid under the action of the circulating pump 72, and the flowing cooling liquid takes away part of heat generated by the battery core, so that the effective cooling of the battery core is realized.
In an embodiment of the present invention, a three-way pipe may be installed at the liquid inlet of the cooling liquid storage tank 60, one end of the three-way pipe is connected to the liquid inlet of the cooling liquid storage tank 60, and the other two ends of the three-way pipe are respectively connected to the liquid inlet of the spray pipe 10 and the liquid outlet of the liquid cooling plate. In addition, a three-way control valve can be arranged at the liquid inlet of the cooling liquid storage tank 60, the connection mode of the three-way control valve is similar to that of a three-way pipe, and the three-way control valve can control the on-off of each branch; for example, when the electric vehicle is used for extinguishing fire or rapidly cooling, only the spray pipe 10 is kept to be communicated with the cooling liquid storage tank 60, so that the cooling liquid in the cooling liquid storage tank 60 is only used for extinguishing the electric cell; and only the communication between the liquid cooling plate and the cooling liquid storage tank 60 is reserved during the normal operation of the battery pack 01, so that the cooling liquid flowing through the liquid cooling plate can realize high-efficiency circulation flow.
For the conventional battery management system, since the battery cell generates a large amount of heat during the charging and discharging processes, a special heat dissipation device is generally provided for the battery cell. The heat sink generally includes a liquid-cooled plate, a circulation pump 72, and a coolant storage tank 60, and the coolant storage tank 60 is generally large enough that the coolant stored therein can also satisfy the fire extinguishing capacity of the cells. Therefore to this fire extinguishing systems, can directly follow the coolant liquid bin 60 of battery management system itself, saved and put out a fire required fire extinguishing agent and fire extinguishing agent splendid attire equipment to electric core, this system not only has reduced entire system's cost for the system that sets up fire extinguishing agent splendid attire equipment alone, has still alleviateed weight.
Further, the material of the shower pipe 10 is a deformable material. Preferably a plastic or aluminium tube. In the charging and discharging process of the battery, when the battery is overheated or catches fire, the temperature of the single battery core rises, so that the spray pipe 10 positioned on one side of the outlet of the battery core safety valve is heated to be damaged or the mechanical strength is reduced. For example, the weak point may be a concave point with a wall thickness smaller than that of the peripheral pipe wall, so that when the shower pipe 10 is damaged or has reduced mechanical strength due to heat, the weak point corresponding to the outlet of the cell safety valve may be damaged more significantly or earlier than other parts of the shower pipe 10. Therefore, when the electric core is put out a fire or cooled down rapidly, the cooling liquid in the cooling liquid storage box 60 is delivered to the spray pipe 10 under high pressure, and the cooling liquid can firstly break or tear the weak point of the spray pipe 10 corresponding to the outlet of the safety valve of the electric core on fire, so that the cooling liquid in the spray pipe 10 can be sprayed to the electric core on fire from the broken weak point, and the fire can be accurately put out a fire facing the electric core on fire.
It should be understood that the weak point refers to a vulnerable point of the shower pipe 10 at a position corresponding to the outlet of the cell safety valve, that is, the weak point is preferentially damaged over the pipe wall at the periphery thereof under the action of a predetermined temperature or a predetermined pressure, so as to ensure that the damaged weak point serves as a spray opening of the cooling liquid. It will be appreciated that the point of weakness may be configured other than with a wall thickness less than that of the surrounding pipe, provided that it is ensured that it is opened when the temperature and/or pressure conditions are met.
Further, the sensor may be at least one of a smoke sensor, a temperature sensor 20, a voltage detection sensor, and an infrared sensor. The smoke sensor achieves the purpose of monitoring the thermal runaway state of the battery cell by monitoring smoke gas in the box body; the temperature sensor 20 is used for monitoring the cell temperature in the box body, converting the cell temperature into an electric signal and outputting the electric signal to the battery management controller 30; the voltage detection sensor may convert the monitored voltage signal of the battery cell into a usable output signal, and the infrared sensor, similarly, converts the monitored temperature of the battery cell into an electrical signal and transmits the electrical signal to the battery management controller 30. After receiving the signal sent by the sensor, the battery management controller 30 further determines the thermal runaway state of the battery core, and further controls the control valve to open or close according to the determination result. The control valve is preferably a solenoid valve 40.
In some embodiments of the present invention, the battery pack 01 has a plurality of battery cells in the box, and accordingly, the number of weak points on the shower pipe 10 is also multiple, that is, the number of the hair spray openings on the shower pipe 10 is also multiple. Preferably, the number of the weak points is the same as that of the battery cells, and the plurality of the weak points correspond to the positions of the safety valve outlets of the plurality of the battery cells in a one-to-one manner. As shown in fig. 1, the shower pipe 10 may be specifically located in the cavity of the box body and located at one side of the safety valve outlet of the battery cell, that is, at a position near or directly above the safety valve outlet of the battery cell. If the safety valve outlet of the battery cell is located on the other sides of the battery cell except the upper side, the spray pipe 10 is also located on the side where the safety valve outlet of the battery cell is located, so long as the spray pipe 10 can be ensured in the spray range of the spray opening of the battery cell.
Fig. 3 is a schematic structural diagram of the shower pipe 10, and fig. 4 is a partially enlarged view of a weak point of the shower pipe 10, as shown in fig. 3 and 4, a plurality of weak points are uniformly distributed on a pipe wall of the shower pipe 10, and are disposed on a side of the shower pipe 10 close to the battery core. The weak point may specifically be a local easy-tear point provided at a local position of the shower 10 with a wall thickness smaller than the wall thickness of its peripheral pipe. The easy-to-tear point can be realized by cutting off part of the wall thickness at a local position of the tube wall. However, it should be ensured that the weak point is not torn during the normal operation of the battery pack 01, that is, the cooling liquid in the cooling liquid storage tank is only used for cooling the battery cell through the liquid cooling plate; and when the battery cell is in a thermal runaway state, the weak point is torn, and the cooling liquid in the cooling liquid storage tank plays a role in extinguishing the fire of the battery cell which catches fire.
Through the embodiment, it can be found that the cooling system for the battery pack of the present disclosure sets up the shower on the outlet side of the safety valve of the battery cell, and the position of the shower corresponding to the battery cell safety valve also has the weak point which is easy to be torn under the predetermined temperature and/or the predetermined pressure, so that when the sensor detects that the thermal runaway phenomenon occurs to the battery cell, the pressure in the cooling liquid storage box increases and makes the high-pressure cooling liquid break through the weak point of the shower corresponding to the safety valve of the battery cell on fire, thereby accurately spraying the cooling liquid to the battery cell on fire, thereby realizing the quick fire extinguishing or the quick cooling of the battery cell on fire, thereby preventing the peripheral battery cell thereof from being ignited and the secondary reburning of the battery cell on fire.
In addition, the liquid cooling plate and the spray pipe share the same cooling liquid storage tank, so that the cost of the whole system is reduced, the structural compactness of the whole system is improved, and the weight of the system is reduced.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.
The above-mentioned embodiments illustrate and describe the basic principles and main features of the present invention, but the present invention is not limited to the above-mentioned embodiments, and those skilled in the art should make modifications, equivalent changes and modifications without creative efforts to the present invention within the protection scope of the technical solution of the present invention.
Claims (10)
1. A cooling system for a battery pack is characterized by comprising a cooling liquid storage tank arranged outside a battery pack box body, a temperature sensor used for monitoring the temperature of the battery pack and a battery management controller connected with the temperature sensor;
the cooling liquid storage tank is connected with a first cooling pipeline and a second cooling pipeline;
the first cooling pipeline is a circulating pipeline and comprises a first branch pipe, a circulating pump, a heat exchanger, a first branch pipe and a main pipe which are connected in series, the heat exchanger is positioned on one side of the battery cell, and the heat exchanger is configured to exchange heat with the battery cell;
the second cooling pipeline comprises a main pipe, a second branch pipe and a spray pipe which are connected in series;
wherein the first and second branches are each in communication with the manifold, the desuperheating system being configured to activate the second cooling circuit when the temperature sensor reaches a predetermined condition.
2. The cooling system according to claim 1, wherein one end of the spray pipe is closed, the other end of the spray pipe is connected with one end of the second branch pipe, which is far away from the main pipe, and a plurality of spray openings which correspond to the battery cells and are opened under a predetermined condition are formed in the spray pipe.
3. The cooling system according to claim 2, wherein the blowout opening is a weak point of the shower pipe wall, and the material of the blowout opening of the shower pipe is a material which is easily broken at a predetermined temperature and/or a predetermined pressure.
4. The cooling system, as set forth in claim 3, wherein said weak point is a concave point having a wall thickness less than the wall thickness of the tube surrounding it.
5. The cooling system of claim 1,
under the working state of the first cooling pipeline, the refrigerant liquid sequentially flows through the first branch pipe, the circulating pump, the heat exchanger, the first branch pipe and the main pipe;
and under the working state of the second cooling pipeline, the refrigerant liquid sequentially flows through the main pipe, the second branch pipe and the spray pipe.
6. The cooling system according to claim 5, further comprising a quick-replacement device connected to the coolant storage tank for quickly discharging the coolant in the coolant storage tank in the second cooling line operating state.
7. The cooling system, as set forth in claim 6, wherein said quick-change device is a high-pressure air reservoir.
8. The cooling system according to claim 6, wherein a control valve is provided between the rapid replacement device and the coolant storage tank, and the control valve is further used for communicating the battery management controller with the rapid replacement device.
9. The cooling system, as set forth in claim 2, wherein said sensor is at least one of a smoke sensor, a voltage detection sensor, and an infrared sensor.
10. The cooling system according to any one of claims 2 to 9, wherein the number of the battery cells is multiple, the number of the burst openings is the same as the number of the battery cells, and the multiple burst openings correspond to the positions of the safety valve outlets of the multiple battery cells in a one-to-one manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385259.2A CN113117274A (en) | 2021-04-09 | 2021-04-09 | Cooling system for battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385259.2A CN113117274A (en) | 2021-04-09 | 2021-04-09 | Cooling system for battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113117274A true CN113117274A (en) | 2021-07-16 |
Family
ID=76775799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110385259.2A Pending CN113117274A (en) | 2021-04-09 | 2021-04-09 | Cooling system for battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113117274A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113769294A (en) * | 2021-08-06 | 2021-12-10 | 合肥工业大学 | Novel new energy automobile battery package fire extinguishing systems |
| US20220359947A1 (en) * | 2019-09-05 | 2022-11-10 | Lg Energy Solution, Ltd. | Battery pack comprising fire extinguishing unit |
| WO2023126245A1 (en) * | 2021-12-28 | 2023-07-06 | Polarium Energy Solutions Ab | A battery device comprising a tube including a cooling and/or fire extinguishing medium |
| EP4293798A4 (en) * | 2021-07-22 | 2024-10-30 | Lg Energy Solution Ltd | Cooling member, and battery module and battery pack including same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202076386U (en) * | 2010-12-31 | 2011-12-14 | 比亚迪股份有限公司 | Battery temperature management system and automobile |
| CN111106276A (en) * | 2018-12-28 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Spraying system of battery pack and battery pack |
| CN111509163A (en) * | 2020-05-25 | 2020-08-07 | 重庆金康动力新能源有限公司 | Battery pack with fire extinguishing function |
| CN112332013A (en) * | 2019-09-26 | 2021-02-05 | 宁德时代新能源科技股份有限公司 | Battery pack, vehicle and control method for relieving thermal runaway spread of battery pack |
| CN112402840A (en) * | 2020-11-13 | 2021-02-26 | 重庆金康动力新能源有限公司 | Fire extinguishing control method for battery pack |
| CN215505235U (en) * | 2021-04-09 | 2022-01-14 | 北京科易动力科技有限公司 | Battery pack fire extinguishing system |
-
2021
- 2021-04-09 CN CN202110385259.2A patent/CN113117274A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202076386U (en) * | 2010-12-31 | 2011-12-14 | 比亚迪股份有限公司 | Battery temperature management system and automobile |
| CN111106276A (en) * | 2018-12-28 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Spraying system of battery pack and battery pack |
| CN112332013A (en) * | 2019-09-26 | 2021-02-05 | 宁德时代新能源科技股份有限公司 | Battery pack, vehicle and control method for relieving thermal runaway spread of battery pack |
| CN111509163A (en) * | 2020-05-25 | 2020-08-07 | 重庆金康动力新能源有限公司 | Battery pack with fire extinguishing function |
| CN112402840A (en) * | 2020-11-13 | 2021-02-26 | 重庆金康动力新能源有限公司 | Fire extinguishing control method for battery pack |
| CN215505235U (en) * | 2021-04-09 | 2022-01-14 | 北京科易动力科技有限公司 | Battery pack fire extinguishing system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220359947A1 (en) * | 2019-09-05 | 2022-11-10 | Lg Energy Solution, Ltd. | Battery pack comprising fire extinguishing unit |
| EP4293798A4 (en) * | 2021-07-22 | 2024-10-30 | Lg Energy Solution Ltd | Cooling member, and battery module and battery pack including same |
| CN113769294A (en) * | 2021-08-06 | 2021-12-10 | 合肥工业大学 | Novel new energy automobile battery package fire extinguishing systems |
| WO2023126245A1 (en) * | 2021-12-28 | 2023-07-06 | Polarium Energy Solutions Ab | A battery device comprising a tube including a cooling and/or fire extinguishing medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113117274A (en) | Cooling system for battery pack | |
| CN113193261B (en) | Liquid-cooling fire-fighting combined management and control system and management and control method for lithium battery energy storage system | |
| CN215505235U (en) | Battery pack fire extinguishing system | |
| WO2022116908A1 (en) | High-energy lithium battery and large energy storage system comprising same | |
| CN112397810A (en) | Fire control and integrative energy storage system of heat dissipation | |
| CN114497802A (en) | Immersed liquid-cooled battery energy storage system and working method thereof | |
| CN109698310B (en) | Pipeline communication type power supply system and safety management method thereof | |
| CN111725582B (en) | Vehicle-mounted battery fireproof heat source management synchronization device and application method | |
| CN112820978B (en) | Battery box liquid cooling heat dissipation and fire extinguishing system | |
| CN112038728A (en) | Cooling and fire-fighting hybrid system for energy storage device and control method thereof | |
| CN218827611U (en) | Battery pack with liquid cooling function and anti-pressure-release energy storage function | |
| CN111384341A (en) | Lithium battery box with fireproof function and using method thereof | |
| CN114448049A (en) | Temperature control system and method and energy storage charging system | |
| EP4300656A2 (en) | Battery module, battery cluster, fire-fighting equipment and enclosed energy storage system | |
| CN214477655U (en) | Battery pack cooling device, battery pack cooling system and battery pack | |
| CN212542547U (en) | Cooling and fire-fighting hybrid system for energy storage device | |
| US20240313290A1 (en) | Safety control mechanism and method, battery system, and electrical apparatus | |
| CN113206317A (en) | Cooling system and method for preventing heat spread of battery pack | |
| CN219149082U (en) | Battery fire extinguishing system and power device | |
| CN217280954U (en) | Battery pack with fire-fighting inhibiting function | |
| WO2023240605A1 (en) | Safety control mechanism and method, battery system, and electric device | |
| CN213093275U (en) | Large-capacity storage battery cabinet | |
| CN216366391U (en) | Fire extinguishing system of energy storage battery device based on temperature switch | |
| CN116031537A (en) | Battery pack | |
| CN114976349A (en) | New energy automobile power battery cooling system from putting out a fire |
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 |