CN113571833A - Battery pack and management method - Google Patents
Battery pack and management method Download PDFInfo
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- CN113571833A CN113571833A CN202110829155.6A CN202110829155A CN113571833A CN 113571833 A CN113571833 A CN 113571833A CN 202110829155 A CN202110829155 A CN 202110829155A CN 113571833 A CN113571833 A CN 113571833A
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- battery pack
- explosion
- shell
- housing
- proof valve
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- 238000007726 management method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000007791 dehumidification Methods 0.000 claims abstract description 22
- 230000001172 regenerating effect Effects 0.000 claims abstract description 15
- 230000008929 regeneration Effects 0.000 claims description 13
- 238000011069 regeneration method Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 229910001629 magnesium chloride Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the technical field of batteries, in particular to a battery pack and a management method, wherein the battery pack comprises a battery pack body, and a BMS is arranged in the battery pack body; dehumidification explosion-proof valve, dehumidification explosion-proof valve includes: the first end of the shell is provided with an air hole communicated with the hollow cavity; the dehumidifying part is arranged in the shell and is positioned at the downstream position of the air vent; a heating member provided in the case, the heating member being provided on the dehumidifying part, the heating member being electrically connected to the BMS; a regenerative sealing valve electrically connected to the BMS; an explosion-proof valve body assembly disposed on the first end of the housing. The invention can effectively prevent the occurrence of condensed water in the battery pack, thereby protecting the safety of the battery pack.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack and a management method.
Background
With the increase of the holding capacity of electric vehicles, thermal runaway accidents are increasingly frequent. The safety problem of electric vehicles has become a focus of social attention. The battery package is under the great environment of high wet, the difference in temperature round the clock, the comdenstion water easily appears in the battery package, and the comdenstion water can lead to high low voltage circuit short circuit in the battery package to appear, endangers battery package safety, leads to the incident to take place even.
Therefore, a battery pack and a management method are required to solve the above technical problems.
Disclosure of Invention
An object of the present invention is to provide a battery pack capable of effectively preventing condensed water from occurring in the battery pack, thereby protecting the safety of the battery pack.
In order to achieve the purpose, the invention adopts the following technical scheme:
a battery pack, comprising:
the battery pack comprises a battery pack body, wherein a BMS is arranged in the battery pack body;
dehumidification explosion-proof valve, dehumidification explosion-proof valve includes:
the battery pack comprises a shell and a battery pack body, wherein the shell is provided with a hollow cavity, the shell is arranged on the battery pack body in a penetrating mode, the first end of the shell extends out relative to the battery pack body, and the first end of the shell is provided with an air hole communicated with the hollow cavity;
the dehumidifying part is arranged in the shell and is positioned at the downstream position of the air vent;
a heating member provided in the case, the heating member being provided on the dehumidifying part, the heating member being electrically connected to the BMS;
the regenerative sealing valve is arranged at a second end opposite to the first end of the shell, the regenerative sealing valve can control the battery pack body to be communicated with the outside atmosphere through the air holes, and the regenerative sealing valve is electrically connected with the BMS;
the explosion-proof valve body assembly is arranged at the first end of the shell and can move relative to the shell and open when the gas pressure of the battery pack body is greater than a set value.
Optionally, the explosion-proof valve body assembly includes an explosion-proof valve core and an elastic member, the explosion-proof valve core is disposed at the first end of the housing, one end of the elastic member is connected to the explosion-proof valve core, and the other end of the elastic member is connected to the housing.
Optionally, a dust cover is disposed in the housing, and the dust cover is covered on the elastic member.
Optionally, a first sealing ring is arranged between the housing and the explosion-proof valve core.
Optionally, a mounting flange is arranged on the casing, a mounting hole is formed in the battery pack body, the second end of the casing is inserted into the mounting hole, and the casing is connected with the battery pack body through the mounting flange.
Optionally, a second sealing ring is arranged between the mounting flange and the battery pack body.
Optionally, an annular groove is formed in one side, facing the battery pack body, of the mounting flange, the second sealing ring is arranged in the annular groove, and one side of the second sealing ring protrudes relative to the annular groove.
Optionally, a waterproof breathable film is arranged on the air holes.
Optionally, the battery pack body comprises a box body and a battery cell, the battery cell and the BMS are arranged in the box body, the box body is provided with the mounting hole, and the shell is inserted in the box body.
Another object of the present invention is to provide a management method of a battery pack, which can effectively prevent the occurrence of condensed water in the battery pack, thereby protecting the safety of the battery pack.
In order to achieve the purpose, the invention adopts the following technical scheme:
a battery pack management method for humidity management of a battery pack as described above, comprising the steps of:
pressure balance mode: the BMS controls the regeneration sealing valve to be opened, external air enters through the air holes in the shell, the dehumidifying part adsorbs water vapor in the external air, and the air with the water vapor removed enters the battery pack body;
dehumidification regeneration mode: the BMS controls the regeneration sealing valve to be closed and controls a heating element to work, the heating element heats the dehumidifying element, water in the dehumidifying element is heated to be changed into water vapor, and the water vapor is discharged through the air holes;
thermal runaway exhaust mode: the BMS controls the regeneration sealing valve to be opened, the high-temperature gas with the pressure greater than the set value pushes the explosion-proof valve body assembly to move relative to the shell to be opened, and the high-temperature gas is discharged through the hollow cavity of the shell.
The invention has the beneficial effects that:
according to the battery pack provided by the invention, the dehumidification explosion-proof valve is arranged on the battery pack body, the air holes are formed in the shell of the dehumidification explosion-proof valve, the dehumidification part is arranged in the shell and is positioned at the downstream position of the air holes, when external gas enters the battery pack body, the dehumidification part is used for filtering and adsorbing, the dehumidification part adsorbs water vapor in the external air, and the air entering the battery pack body is ensured to have no moisture, so that condensed water in the battery pack is effectively prevented from occurring, and the purpose of protecting the safety of the battery pack is achieved; the BMS can control the heating element to heat the dehumidifying element and close the regeneration sealing valve at the same time, so that the heated water vapor is discharged through the air holes, the dehumidifying element is regenerated, the dehumidifying element can be repeatedly used, and the phenomenon that condensed water appears in the battery pack body due to untimely replacement is avoided; and when the battery pack breaks down and causes heat to rise, the explosion-proof valve body assembly can be quickly opened, so that safety accidents are avoided.
According to the battery pack management method provided by the invention, the humidity management is carried out on the battery pack, a pressure balance mode, a dehumidification regeneration mode and a thermal runaway exhaust mode can be realized, and condensed water in the battery pack can be effectively prevented, so that the safety of the battery pack is protected.
Drawings
Fig. 1 is a general schematic diagram of a battery pack according to an embodiment of the present invention;
FIG. 2 is an exploded view of a dehumidification explosion-proof valve in an embodiment of the present invention;
FIG. 3 is a schematic view of a housing in an embodiment of the invention;
fig. 4 is a flowchart of a battery pack management method according to a second embodiment of the present invention.
In the figure:
1. a box body; 2. a BMS; 3. an electric core; 4. a dehumidification explosion-proof valve; 41. a housing; 411. air holes are formed; 412. a waterproof breathable film; 413. installing a flange; 4131. an annular groove; 42. a dehumidifying part; 421. a heating member; 43. a regenerative sealing valve; 44. a second seal ring; 45. an elastic member; 451. a dust cover; 46. a first seal ring; 47. an explosion-proof valve core.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example one
In order to effectively prevent condensed water from occurring in the battery pack, thereby protecting the safety of the battery pack and ensuring the safety of the electric vehicle, as shown in fig. 1 to 3, the invention provides a battery pack. This battery package includes: a battery pack body and a dehumidifying explosion-proof valve 4.
Wherein, dehumidification explosion-proof valve 4 includes: the housing 41, the dehumidifying part 42, the heating part 421, the regenerative sealing valve 43 and the explosion-proof valve body assembly. The shell 41 is provided with a hollow cavity, the shell 41 is arranged on the battery pack body in a penetrating mode, the first end of the shell 41 extends out relative to the battery pack body, and the first end of the shell 41 is provided with an air hole 411 communicated with the hollow cavity; the dehumidifying part 42 is fixedly arranged in the shell 41 and is positioned at the downstream position of the air vent 411; a heating member 421 is provided in the case 41, the heating member 421 is provided on the dehumidifying member 42, and the heating member 421 is electrically connected to a BMS2 (battery management system) provided in the battery pack body; a regenerative sealing valve 43 is disposed at a second end opposite to the first end of the case 41, the regenerative sealing valve 43 can control the cell pack body to communicate with the outside atmosphere through the vent 411, and the regenerative sealing valve 43 is electrically connected to the BMS 2; the explosion-proof valve body assembly is disposed on the first end of the housing 41, and can be moved to open relative to the housing 41 when the gas pressure of the battery pack body is greater than a set value.
When external gas enters the battery pack body, the gas is firstly filtered and adsorbed through the dehumidifying part 42, and the dehumidifying part 42 adsorbs water vapor in the external air to ensure that no water exists in the air entering the battery pack body, so that condensed water in the battery pack is effectively prevented from occurring, and the purpose of protecting the safety of the battery pack is achieved; moreover, the heating element 421 is arranged beside the dehumidifying element 42, the BMS2 can control the heating element 421 to heat the dehumidifying element 42, and the regeneration sealing valve 43 is closed, so that the heated water vapor is discharged through the air vent 411, the dehumidifying element 42 is regenerated, the dehumidifying element can be repeatedly used, and the phenomenon that condensed water is generated in the battery pack body due to untimely replacement is avoided; and when the battery pack breaks down and causes heat to rise, the explosion-proof valve body assembly can be quickly opened, so that safety accidents are avoided.
In the present embodiment, the dehumidifying part 42 employs a chemical dehumidifying method. Specifically, magnesium chloride is mainly provided on the dehumidifying part 42. The magnesium chloride can adsorb water to form magnesium chloride as crystal water. When the magnesium chloride containing the crystal water is heated, the crystal water can be rapidly volatilized, so that the dehumidifying element 42 can be repeatedly used for a certain period of time.
Optionally, the explosion-proof valve body assembly comprises an explosion-proof valve core 47 and an elastic member 45, the explosion-proof valve core 47 is arranged at a first end of the housing 41, one end of the elastic member 45 is connected with the explosion-proof valve core 47, and the other end is connected with the housing 41. Specifically, the elastic member 45 is an extension spring in this embodiment, when the electric core 3 in the battery pack body is out of control to cause generation of a large amount of high-temperature gas, the pressure in the battery pack body rises rapidly, so that the gas pressure is too high to reach a threshold value at which the explosion-proof valve is opened, and the explosion-proof valve element 47 overcomes the pretightening force of the elastic member 45 under the action of the gas pressure, so that the explosion-proof valve element 47 opens to exhaust outwards, thereby ensuring the safety of the battery pack body and preventing the explosion of the battery pack due to the high-temperature and high-pressure gas.
Optionally, a dust cover 451 is provided in the housing 41, the dust cover 451 covering the elastic member 45. The dust cover 451 prevents dust from entering the elastic member 45, thereby preventing the elastic member 45 from being jammed by dust and failing to operate.
Optionally, a first sealing ring 46 is provided between the housing 41 and the explosion-proof valve spool 47. The sealing performance between the explosion-proof valve core 47 and the shell 41 can be ensured by arranging the first sealing ring 46, and gas is prevented from entering through a gap between the explosion-proof valve core 47 and the shell 41, so that the dehumidifying part 42 is rapidly failed. Specifically, the first sealing ring 46 may be made of rubber or silicone with good mechanical properties.
Optionally, the housing 41 is provided with an installation flange 413, the battery pack body is provided with an installation hole, the second end of the housing 41 is inserted into the installation hole, and the housing 41 is connected with the battery pack body through the installation flange 413. By providing the mounting flange 413, the housing 41 is conveniently connected to the battery pack body. And can be replaced quickly after the dehumidification explosion-proof valve 4 is failed. Through the mode, quick assembly disassembly of dehumidification explosion-proof valve 4 can be realized.
Optionally, a second sealing ring 44 is disposed between the mounting flange 413 and the battery pack body. Can shutoff mounting flange 413 and the clearance between the battery package body through setting up second sealing washer 44, prevent that outside air from directly getting into the battery package body through the clearance between mounting flange 413 and the battery package body inside, cause this internal existence of battery package to appear the possibility of comdenstion water.
Optionally, an annular groove 4131 is opened on one side of the mounting flange 413 facing the battery pack body, a second sealing ring 44 is disposed in the annular groove 4131, and one side of the second sealing ring 44 protrudes relative to the annular groove 4131. Through seting up ring channel 4131, be convenient for install and fix a position second sealing washer 44, at the in-process of installation casing 41 moreover, utilize the connection between mounting flange 413 and the battery package body, extrude second sealing washer 44 and warp to the clearance between shutoff mounting flange 413 and the battery package body guarantees the gas tightness between mounting flange 413 and the battery package body.
Optionally, a waterproof breathable film 412 is arranged on the breathable hole 411. Through setting up waterproof ventilated membrane 412, can prevent effectively that external atmosphere from carrying more steam and entering into casing 41 to avoid dehumidification piece 42 to adsorb steam fast a large amount and lead to becoming invalid. The waterproof breathable membrane 412 only allows gas to enter, while liquid droplets cannot.
Optionally, the battery pack body comprises a box body 1 and a battery cell 3, the battery cell 3 and the BMS2 are arranged in the box body 1, a mounting hole is formed in the box body 1, and the housing 41 is inserted into the box body 1. Store and discharge through electric core 3, box 1 is used for saving electric core 3, and BMS2 is used for managing the battery package, guarantees that the battery package can normally work.
Example two
An object of the present embodiment is to provide a management method of a battery pack, which can effectively prevent condensed water from occurring in the battery pack, thereby protecting the safety of the battery pack.
To achieve the above object, as shown in fig. 4, the present embodiment provides a method for managing a battery pack, which performs humidity management on the battery pack according to the first embodiment, and includes the following steps:
pressure balance mode: the BMS2 controls the regeneration sealing valve 43 to open, the outside air enters through the air vent 411 on the case 41, the moisture removal member 42 absorbs the water vapor in the outside air, and the air with the water vapor removed enters the battery pack body; specifically, when the whole vehicle is in normal use or a static state, the dehumidification explosion-proof valve 4 is in a pressure balance mode.
After the battery pack operates for a certain time, the dehumidifying capacity of the dehumidifying part 42 tends to be saturated.
Dehumidification regeneration mode: the BMS2 controls the regenerative sealing valve 43 to close and controls the heating element 421 to work, the heating element 421 heats the dehumidifying element 42, the water in the dehumidifying element 42 is heated to be changed into water vapor, and the water vapor is discharged through the air vent 411; so that the dehumidifying part 42 can be reused. By the above manner, the dehumidifying element 42 can be repeatedly used, frequent replacement of the dehumidifying element 42 is avoided, and economic cost is saved.
Thermal runaway exhaust mode: the BMS2 controls the regenerative sealing valve 43 to open, the high temperature gas with pressure higher than the set value pushes the explosion-proof valve body assembly to move and open relative to the housing 41, and the high temperature gas is discharged through the hollow cavity of the housing 41. Through the mode, when the electric core 3 is out of control thermally, a large amount of high-temperature shells 41 generated by the electric core 3 can be discharged quickly, so that the safety of the battery pack is ensured.
Optionally, the explosion-proof valve body assembly comprises an explosion-proof valve core 47 and an elastic member 45, the explosion-proof valve core 47 is arranged at a first end of the housing 41, one end of the elastic member 45 is connected with the explosion-proof valve core 47, and the other end is connected with the housing 41. Specifically, the elastic member 45 is an extension spring in this embodiment, when the electric core 3 in the battery pack body is out of control to cause generation of a large amount of high-temperature gas, the pressure in the battery pack body rises rapidly, so that the gas pressure is too high to reach a threshold value at which the explosion-proof valve is opened, and the explosion-proof valve element 47 overcomes the pretightening force of the elastic member 45 under the action of the gas pressure, so that the explosion-proof valve element 47 opens to exhaust outwards, thereby ensuring the safety of the battery pack body and preventing the explosion of the battery pack due to the high-temperature and high-pressure gas.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A battery pack, comprising:
a battery pack body in which a BMS (2) is disposed;
dehumidification explosion-proof valve (4), dehumidification explosion-proof valve (4) include:
the battery pack comprises a shell (41) and a battery pack body, wherein the shell (41) is provided with a hollow cavity, the shell (41) penetrates through the battery pack body, the first end of the shell (41) extends out relative to the battery pack body, and the first end of the shell (41) is provided with a vent hole (411) communicated with the hollow cavity;
a dehumidifying part (42), wherein the dehumidifying part (42) is arranged in the shell (41) and is positioned at the downstream position of the air vent (411);
a heating member (421), the heating member (421) being provided in the housing (41), the heating member (421) being provided on the dehumidifying part (42), the heating member (421) being electrically connected to the BMS (2);
a regenerative sealing valve (43), the regenerative sealing valve (43) being disposed at a second end opposite to the first end of the housing (41), the regenerative sealing valve (43) being capable of controlling the battery pack body to communicate with the outside atmosphere through the vent hole (411), the regenerative sealing valve (43) being electrically connected to the BMS (2);
the explosion-proof valve body assembly is arranged at the first end of the shell (41), and can move relative to the shell (41) and open when the gas pressure of the battery pack body is greater than a set value.
2. The battery pack according to claim 1, wherein the explosion-proof valve body assembly comprises an explosion-proof valve core (47) and an elastic member (45), the explosion-proof valve core (47) is arranged at a first end of the housing (41), one end of the elastic member (45) is connected with the explosion-proof valve core (47), and the other end is connected with the housing (41).
3. A battery pack according to claim 2, wherein a dust cover (451) is provided in the housing (41), and the dust cover (451) is covered on the elastic member (45).
4. A battery pack, as claimed in claim 2, characterised in that a first sealing ring (46) is provided between the housing (41) and the explosion-proof valve cartridge (47).
5. The battery pack according to claim 1, wherein the housing (41) is provided with a mounting flange (413), the battery pack body is provided with a mounting hole, the second end of the housing (41) is inserted into the mounting hole, and the housing (41) is connected with the battery pack body through the mounting flange (413).
6. A battery pack, as claimed in claim 5, characterised in that a second sealing ring (44) is provided between the mounting flange (413) and the body of the battery pack.
7. The battery pack according to claim 6, wherein the mounting flange (413) has an annular groove (4131) formed on a side thereof facing the battery pack body, the second sealing ring (44) is disposed in the annular groove (4131), and a side of the second sealing ring (44) protrudes relative to the annular groove (4131).
8. The battery pack according to any one of claims 1 to 7, wherein the air permeable hole (411) is provided with a waterproof air permeable membrane (412).
9. The battery pack according to any one of claims 6, wherein the battery pack body comprises a case (1) and a battery cell (3), the battery cell (3) and the BMS (2) are arranged in the case (1), the mounting hole is formed in the case (1), and the housing (41) is inserted into the case (1).
10. A battery pack management method for humidity management of a battery pack according to any one of claims 1 to 9, comprising the steps of:
pressure balance mode: the BMS (2) controls the regeneration sealing valve (43) to be opened, external air enters through the air vent (411) on the shell (41), the dehumidifying part (42) adsorbs water vapor in the external air, and the air with the water vapor removed enters the battery pack body;
dehumidification regeneration mode: the BMS (2) controls the regeneration sealing valve (43) to be closed and controls a heating element (421) to work, the heating element (421) heats the dehumidifying element (42), water in the dehumidifying element (42) is heated to be changed into water vapor, and the water vapor is discharged through the air vent (411);
thermal runaway exhaust mode: the BMS (2) controls the regeneration sealing valve (43) to be opened, the high-temperature gas with the pressure greater than the set value pushes the explosion-proof valve body assembly to move relative to the shell (41) to be opened, and the high-temperature gas is discharged through the hollow cavity of the shell (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829155.6A CN113571833A (en) | 2021-07-22 | 2021-07-22 | Battery pack and management method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829155.6A CN113571833A (en) | 2021-07-22 | 2021-07-22 | Battery pack and management method |
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| CN113571833A true CN113571833A (en) | 2021-10-29 |
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| CN202110829155.6A Pending CN113571833A (en) | 2021-07-22 | 2021-07-22 | Battery pack and management method |
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