CN107878204B - Battery pack sealing detection method and system and vehicle - Google Patents
Battery pack sealing detection method and system and vehicle Download PDFInfo
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- CN107878204B CN107878204B CN201610871932.2A CN201610871932A CN107878204B CN 107878204 B CN107878204 B CN 107878204B CN 201610871932 A CN201610871932 A CN 201610871932A CN 107878204 B CN107878204 B CN 107878204B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4228—Leak testing of cells or batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention provides a sealing detection method and system for a battery pack and a vehicle, wherein the method comprises the following steps: detecting whether a sealing detection signal of the battery pack is received; if so, inflating the sealed cavity until the air pressure in the sealed cavity is increased to a first preset pressure from the normal pressure; the sealed cavity is decompressed through a breather valve until the air pressure in the sealed cavity is reduced to normal pressure, and the decompression time is recorded; judging whether the pressure relief time is less than a first preset time; if yes, judging that the sealed cavity is leaked, and alarming the leakage. The method can effectively detect whether the sealing state of the battery pack is good or not in real time, and can give an early warning on the untight sealing of the battery pack, so that the safety and the reliability of the battery pack can be improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a sealing detection method and system for a battery pack and a vehicle.
Background
The running condition of the vehicle is complicated, and for the electric automobile, if the vehicle is in running conditions such as wading, battery pack charging and the like, if the battery pack is sealed and is not well soaked in water, the problems of short circuit, fire, explosion and the like can be caused, the safety of passengers is damaged, and property loss is caused.
Because the battery pack is provided with the breather valve which has the functions of balancing the air pressure inside and outside the battery pack, preventing dust, preventing liquid water under certain pressure from entering the battery pack and reducing the concentration of harmful gas leaked from the battery in the battery pack, the sealing state of the battery pack can not be effectively judged by the pressure sensor.
In addition, the waterproof grade of the power battery pack for the vehicle is IP67, the power battery pack is required to be waterproof for 3 hours under water with the depth of 1m, if the battery pack is soaked in water for a long time, leakage may occur even if the water depth is less than 1m, and the safety of the battery pack cannot be ensured. In the operation process of the battery pack, due to the reasons of vibration, aging, corrosion, rubbing and the like, the sealing of the battery pack may not reach IP67, so that the sealing safety of the battery pack cannot be ensured by mechanical sealing detection before delivery.
Disclosure of Invention
In view of this, the present invention is directed to a method for detecting the sealing of a battery pack, which can effectively detect whether the sealing state of the battery pack is good or not in real time, and perform an early warning on the sealing failure of the battery pack, so as to improve the safety and reliability of the battery pack.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a sealing detection method of a battery pack comprises a sealing cavity and a power battery positioned in the sealing cavity, wherein a breather valve is arranged on the sealing cavity, and the method comprises the following steps: detecting whether a sealing detection signal of the battery pack is received; if so, inflating the sealed cavity until the air pressure in the sealed cavity is increased to a first preset pressure from normal pressure, and stopping inflating; the sealed cavity is decompressed through the breather valve until the air pressure in the sealed cavity is reduced to the normal pressure, and the decompression time is recorded; judging whether the pressure relief time is less than a first preset time or not; if yes, judging that the sealed cavity leaks air, and giving an air leakage alarm.
Further, the sealing detection signal includes at least one of a first flooding signal, a charging signal, and a manual detection signal.
Further, the method also comprises the following steps: detecting whether a second flooding signal is received; if the first preset pressure is lower than the second preset pressure, a battery pack is soaked and alarmed, the sealed cavity is inflated until the air pressure in the sealed cavity is increased to the first preset pressure from the normal pressure, the air pressure in the sealed cavity is maintained at the first preset pressure, and the soaking depth corresponding to the second soaking signal is larger than the soaking depth corresponding to the first soaking signal.
Further, the method also comprises the following steps: detecting whether a third flooding signal is received; and if so, carrying out vehicle flooding alarm and forbidding the inflation function in the sealed cavity, wherein the flooding depth corresponding to the third flooding signal is greater than the flooding depth corresponding to the second flooding signal.
Further, the method also comprises the following steps: detecting whether the humidity in the sealed cavity is greater than a first preset humidity; if yes, inflating the sealed cavity and exhausting air through the breather valve so as to dehumidify the sealed cavity through air flow.
Further, when the sealed cavity is inflated, the device further comprises: judging whether the humidity of the gas filled in the sealed cavity is greater than a second preset humidity or not; if yes, drying the gas filled in the sealed cavity.
Further, in the process of inflating the sealed cavity and stopping inflating until the air pressure in the sealed cavity is increased from the normal pressure to the first preset pressure, the method further includes: recording the inflation time; judging whether the inflation time is greater than a second preset time; if yes, judging that the sealed cavity leaks air, and giving an air leakage alarm.
Further, the method also comprises the following steps: judging whether the pressure relief time is greater than a third preset time; if so, judging that the breather valve is in fault, and alarming the breather valve in fault, wherein the third preset time is greater than the first preset time.
Compared with the prior art, the sealing detection method of the battery pack has the following advantages:
the sealing detection method of the battery pack can effectively detect whether the sealing state of the battery pack is good or not in real time, and can give an early warning on the untight sealing of the battery pack, so that the safety and the reliability of the battery pack can be improved.
Another objective of the present invention is to provide a sealing detection system for a battery pack, which can effectively detect whether the sealing state of the battery pack is good or not in real time, and perform an early warning on the sealing failure of the battery pack, so as to improve the safety and reliability of the battery pack.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a sealed detecting system of battery package, the battery package includes seal chamber and is located power battery in the seal chamber, the last breather valve that is equipped with of seal chamber, the system includes: the detection device is used for detecting a sealing detection signal of the battery pack and a pressure signal in the sealing cavity; the inflation device is used for inflating the sealed cavity; the controller is respectively connected with the detection device and the inflation device, so that when the detection device detects a sealing detection signal of the battery pack, the inflation device is controlled to inflate the air in the sealed cavity to a first preset pressure, the inflation device is controlled to stop inflating, when the breather valve releases the pressure of the sealed cavity to normal pressure, the pressure release time is recorded, when the pressure release time is judged to be smaller than a first preset time, the sealed cavity is judged to be air leaked, and air leakage alarm is carried out.
Further, the sealing detection signal at least includes one of a first submergence depth sensor for detecting a first submergence signal, a charging signal collector for detecting a charging signal, and a switch for turning on a manual detection signal.
Further, the method also comprises the following steps: a second depth sensor that soaks for detecting the second signal that soaks, the controller with the second depth sensor that soaks links to each other, so that the second depth sensor that soaks detects when the second signal that soaks, carry out the warning that soaks of battery package, and control aerating device to aerify in the sealed cavity, and will atmospheric pressure in the sealed cavity is maintained first predetermined pressure, wherein, the depth that soaks that the second signal that soaks corresponds is greater than and corresponds to the depth that soaks that the first signal that soaks corresponds.
Further, the method also comprises the following steps: a third depth sensor that soaks for detecting the third signal that soaks, the controller with the third depth sensor that soaks links to each other to when the third depth sensor that soaks detects the third signal that soaks, carry out the vehicle and soak the warning, and forbid aerating device, wherein, the depth that soaks that the third signal that soaks corresponds is greater than and corresponds to the depth that soaks that the second signal that soaks corresponds.
Further, the method also comprises the following steps: a first humidity transducer for detecting the humidity in the sealed cavity, the controller with first humidity transducer links to each other, with first humidity transducer detects when humidity in the sealed cavity is greater than first predetermined humidity, control aerating device to aerify in the sealed cavity, with the utilization with the air current that the breather valve exhaust formed is right dehumidify in the sealed cavity.
Further, the method also comprises the following steps: the drying device is arranged between the inflating device and the sealed cavity; and the second humidity sensor is used for detecting the humidity of the gas filled into the sealed cavity, and the controller is connected with the second humidity sensor so as to control the inflation device to inflate the gas into the sealed cavity, and control the drying device to dry the gas filled into the sealed cavity if the humidity of the gas filled into the sealed cavity is judged to be greater than a second preset humidity.
Further, the controller is further used for judging that the sealed cavity is leaked and giving an air leakage alarm according to the recorded inflation time of the inflation device and when the inflation time is judged to be larger than a second preset time.
Further, the controller is further configured to determine whether the pressure relief time is greater than a third predetermined time, and if so, determine that the breathing valve is faulty, and alarm the breathing valve as to the fault, where the third predetermined time is greater than the first predetermined time.
The advantages of the sealing detection system of the battery pack and the sealing detection method of the battery pack are the same compared with the prior art, and are not repeated herein.
Still another object of the present invention is to provide a vehicle, which can effectively detect whether the sealing state of a battery pack is good or not in real time, and can early warn that the battery pack is not sealed tightly, so as to improve the safety and reliability of the battery pack.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with the quick charging system of the power battery according to any one of the embodiments.
The vehicle and the above-mentioned sealing detection system for a battery pack have the same advantages as the prior art, and are not described herein again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for detecting a seal of a battery pack according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a method of detecting a seal of a battery pack according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a positional relationship between a battery pack and a related device in the method for detecting a seal of a battery pack according to the embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a method for detecting the sealing of a battery pack according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating a structure of a sealing detection system of a battery pack according to an embodiment of the present invention.
Description of reference numerals:
the system comprises a battery pack sealing detection system 500, a detection device 510, an air charging device 520, a controller 530, a battery pack charging signal collector C1, a battery pack internal humidity sensor S1, a battery pack internal pressure sensor P1, a battery pack immersion depth sensor J1, a battery pack immersion depth sensor J2, an automobile immersion depth sensor J3, an air pump air inlet humidity sensor S2, a normally closed check valve F1 and a normally closed check valve F2.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a flowchart of a method of detecting a seal of a battery pack according to an embodiment of the present invention.
Before describing the sealing detection method of the battery pack according to the embodiment of the invention, firstly, the battery pack is introduced, the battery pack generally comprises a power battery and a sealing cavity for sealing the power battery, the power battery is arranged in the sealing cavity, a breather valve is arranged on the sealing cavity, the breather valve has the functions of balancing the air pressure inside and outside the battery pack, preventing dust, preventing liquid water under certain pressure from entering the battery pack, and reducing the concentration of harmful gas leaked from the power battery in the battery pack, the power battery comprises a plurality of single batteries, and the plurality of single batteries can be connected in series and/or in parallel according to the output voltage requirement of the power battery.
As shown in fig. 1, a method for detecting the sealing of a battery pack according to an embodiment of the present invention includes the steps of:
s101: whether a sealing detection signal of the battery pack is received is detected. In one embodiment of the present invention, the seal detection signal includes at least one of, but is not limited to, a first submergence signal, a charge signal, and a manual detection signal.
As shown in fig. 2, the sealing detection signal can be detected by a corresponding detection unit, for example: a battery pack submergence depth sensor J1 that detects the first submergence signal, a battery pack charge signal collector C1 that detects the charge signal, a switch or button (not shown in fig. 2) that generates a manual detection signal when activated.
In one embodiment of the present invention, the submersion depth sensor J1 may be disposed at a height as shown in fig. 3. Namely: between the ground and the battery pack lower shell.
S102: if yes, inflating the sealed cavity, and stopping inflating until the air pressure in the sealed cavity is increased to a first preset pressure from the normal pressure, wherein the first preset pressure is higher than the normal pressure. The atmospheric pressure is generally normal atmospheric pressure.
With reference to fig. 2 and fig. 4, step S102 may be executed by the sealing monitoring control unit, and the sealing monitoring control unit, when receiving the first water immersion signal, the charging signal, or the manual detection signal, indicates that there is a current need for performing the sealing detection on the battery pack, at this time, inflates air into the sealed cavity, and stops inflating until the air pressure in the sealed cavity rises from the normal pressure to a first predetermined pressure, where the first predetermined pressure is greater than the normal pressure. The atmospheric pressure is generally normal atmospheric pressure.
In this example, the air pump may inflate the sealed cavity of the battery pack, as shown in fig. 2, after passing through the normally closed one-way valve 1 and the air drying device, the air pump inflates the inside of the battery pack (i.e., inside the sealed cavity), or after passing through the normally closed one-way valve 2, the air pump inflates the inside of the battery pack (i.e., inside the sealed cavity).
The first predetermined pressure may be detected by a pressure sensor, as shown in fig. 2 and 4, which may be detected by a pressure sensor P1 provided in the battery pack. The first predetermined pressure may be determined experimentally or empirically, and is required to be greater than atmospheric pressure so as to prevent some water from entering the battery pack, and is denoted as P0.
S103: and (4) decompressing the sealed cavity through the breather valve until the air pressure in the sealed cavity is reduced to the normal pressure, and recording the decompression time.
As shown in fig. 4, taking the first submersion signal as an example, if the first submersion signal is received, the wading submersion needs to be protected. In this case, after the vehicle is waded or immersed in water, the air pressure in the battery pack may be maintained at the first predetermined pressure P0 in step S102, thereby preventing a certain amount of water from being immersed in the battery pack. Then, because the breather valve has the function of balancing the air pressure inside and outside the battery pack, the breather valve can be used for decompressing the sealed cavity until the air pressure in the sealed cavity is reduced to the normal pressure, and the decompression time is recorded, wherein the decompression time is represented by t 2.
S104: and judging whether the pressure relief time is less than a first preset time.
Specifically, if the sealed cavity is good and no poor seal exists, the time for relieving the air pressure in the sealed cavity from the first preset pressure P0 to the normal pressure by the breather valve is a standard time range which can be calibrated through experiments. The first predetermined time of the embodiment of the present invention may be set as a lower limit time of the standard time range.
S105: if yes, judging that the sealed cavity is leaked, and alarming the leakage.
Specifically, if the pressure relief time t2 is less than the first predetermined time, namely: the pressure release speed is compared when sealed cavity is sealed well with the help of the breather valve in with the atmospheric pressure in the sealed cavity by first predetermined pressure P0 pressure release to the pressure release of ordinary pressure fast, and it leaks gas to show that sealed cavity exists, promptly: the sealing cavity is not sealed well. That is, if the pressure relief time t2 is less than the first predetermined time, it can be determined that there is air leakage in the sealed cavity, and at this time, an air leakage alarm can be performed.
According to the sealing detection method of the battery pack, whether the sealing state of the battery pack is good or not can be effectively detected in real time, and early warning is carried out on the untight sealing of the battery pack, so that the safety and the reliability of the battery pack can be improved.
As a specific example, if the sealing detection signal is a charging signal, the sealing detection may be performed on the battery pack in a charging mode. Specifically, referring to fig. 2, if the battery pack charging signal collector C1 collects a charging signal, it indicates that the power battery is in a charging mode, and at this time, in order to ensure the safety and reliability of the charging process, the battery pack needs to be subjected to sealing detection. Specifically, the air pump is turned on, during which whether to dry the air can be selected according to the humidity of the pumped air, and if the air needs to be dried, the normally closed one-way valve F1 can be opened so that the air passes through the air drying device and enters the battery pack. After the pressure in the battery pack is increased to P0, the air pump is closed, at the moment, the normally closed one-way valves F1 and F2 are closed, the pressure P0 in the battery pack is reduced to normal pressure after a period of time t2 because the breather valve and the gap exist, if t2 is less than the lower limit of the t set value (namely the lower limit time of the standard time range), the sealing state is considered to be poor, the air pump is started to prompt an alarm, the pressure in the battery pack is continuously maintained in a P0 state, and water with a certain resistance value enters the battery pack. If t2 is larger than the upper limit of the t set value (namely the lower limit time of the standard time range), judging that the breather valve is abnormal, and giving an alarm; if t2 is within the set value (i.e. standard time range), no alarm is given, indicating that the sealing is normal, and the air pump is turned off.
As another specific example, if the seal detection signal is the first submergence signal, the seal detection may be performed on the battery pack under a submergence condition. Specifically, as shown in fig. 2 and 4, if the battery pack submergence depth sensor J1 detects submergence (i.e., outputs a first submergence signal), it indicates that the power battery may be in a submergence risk, and in this case, the battery pack needs to be subjected to sealing detection in order to ensure the safety and reliability of the power battery when the power battery is used under the condition. Specifically, when the battery pack immersion depth sensor J1 monitors that the electric vehicle is in a wading state, an air pump is started, whether air is dry or not is selected according to the humidity of pumped air, then the pressure in the battery pack is increased to P0, the air pump is closed, at the moment, normally closed one-way valves F1 and F2 are closed, the pressure in the battery pack P0 is reduced to normal pressure after a period of time t2 due to the existence of a breather valve and a gap, if t2 is less than the lower limit of a t set value (namely the lower limit time of a standard time range), the sealing state is considered to be poor, an alarm is given, the air pump is started, the pressure in the battery pack is continuously maintained in a P0 state, and water.
As still another specific example, the sealing state of the battery pack may be detected at any time as needed. Namely: a user manually opens a switch or a button to trigger a manual detection signal, at the moment, an air pump is automatically started, whether air is dried or not is selected according to the humidity of pumped air, then the pressure in the battery pack is increased to P0 and then the air pump is closed, at the moment, normally closed one-way valves F1 and F2 are closed, due to the existence of a breather valve and a gap, the pressure in the battery pack P0 is reduced to normal pressure after a period of time t2, if t2 is less than the lower limit of a t set value (namely the lower limit time of a standard time range), the sealing state is considered to be poor, and the alarm prompt is carried out, so that whether the sealing of the battery pack.
As shown in fig. 2 and 4, if the immersion depth is high, for example: the immersion depth is immersed above the lower case of the battery pack, and at this time, the method of the embodiment of the present invention further includes:
1. detecting whether a second flooding signal is received. As shown in fig. 2, it is possible to detect whether the water level exceeds the lower case of the battery pack by the battery pack submergence depth sensor J2 and generate a second submergence signal.
2. If yes, performing water immersion alarm on the battery pack, inflating the sealed cavity until the air pressure in the sealed cavity is increased to a first preset pressure from the normal pressure, and maintaining the air pressure in the sealed cavity at the first preset pressure. Therefore, the water can be prevented from permeating into the battery pack to a certain extent, the battery pack is protected, and the safety of the battery pack is improved.
3. And detecting whether a third flooding signal is received. As shown in fig. 2, it is possible to detect whether the water level exceeds the air pump by the battery pack submergence depth sensor J3 and generate a third submergence signal
4. If yes, a vehicle immersion alarm is carried out, and the inflation function in the sealed cavity is forbidden, namely: the air pump has the risk of entering, so the air pump is stopped use, in order to avoid the air pump to damage.
That is, when there are signals from J1 and J2 and no signal from J3, the air pump is turned on, and air is selected to be dry or not according to the humidity of the pumped air, the air pressure in the battery pack is raised to P0, and the air pump is used to maintain the air pressure in the pack, and when there is a signal from J3, it indicates that the air inlet of the air pump may be submerged in water, and the air pump is turned off, thereby protecting the air pump and preventing water from being pumped into the battery pack.
As shown in fig. 4, in this example, the second flooding signal corresponds to a greater flooding depth than the flooding depth corresponding to the first flooding signal, and the third flooding signal corresponds to a greater flooding depth than the flooding depth corresponding to the second flooding signal.
The method provided by the embodiment of the invention can effectively detect whether the sealing performance of the battery pack is good or not, and can effectively dehumidify the interior of the battery pack, thereby ensuring the performance and safety of the battery pack. Specifically, the method comprises the following steps:
1. detecting whether the humidity in the sealed cavity is greater than a first predetermined humidity.
As shown in fig. 2, the humidity in the sealed cavity can be detected by a humidity sensor S1 disposed in the sealed cavity.
2. If yes, inflating air into the sealed cavity, and exhausting air through the breather valve so as to dehumidify the sealed cavity through air flow.
Further, when aerifing in sealed cavity, still include:
1. and judging whether the humidity of the gas filled into the sealed cavity is greater than a second preset humidity.
2. If yes, the gas filled in the sealed cavity is dried.
That is, the humidity sensor S1 monitors the humidity inside the battery pack, and when the humidity value monitored by the humidity sensor S1 > set S1 (i.e., first predetermined humidity), the air pump is activated to select whether to dry air according to the humidity of the pumped air (i.e., if it is greater than second predetermined humidity, drying is required), the pressure inside the pack P0 is controlled, and the dry air input into the battery pack gradually discharges the moist air inside the pack through the breather valve, and when the humidity value monitored by the humidity sensor S1 < S1, it indicates that the air inside the pack is in a dry state, and the air pump is deactivated. Therefore, the battery pack can be effectively dehumidified, and the performance of the battery pack is improved.
It will be appreciated that the first predetermined humidity and the second predetermined humidity may be pre-calibrated experimentally or empirically.
The method of the embodiment of the present invention may determine whether the battery pack is well sealed according to the air leakage time, and in other examples of the present invention, may also determine whether the battery pack is well sealed according to the air inflation time, specifically, in a process of inflating the sealed cavity until the air pressure in the sealed cavity is increased from the normal pressure to the first predetermined pressure, the method further includes:
1. the time of inflation was recorded.
2. And judging whether the inflation time is greater than a second preset time.
3. If yes, judging that the sealed cavity is leaked, and alarming the leakage.
That is, if the battery pack is well sealed, the time from the normal pressure aeration to the first predetermined pressure is within a standard time range. Therefore, the second predetermined time may be set to the lower time of the time range of the standard, that is: when the inflation time is longer than the second preset time, the air leakage of the sealing cavity is indicated, and the required inflation time is longer. Therefore, whether the sealing performance of the battery pack is good or not can be effectively detected in real time.
In one embodiment of the present invention, the method of detecting the sealing of a battery pack further includes:
1. and judging whether the pressure relief time is greater than a third preset time. The third predetermined time is the upper time of the standard pressure relief time range.
2. If so, judging that the breather valve is in fault, and alarming the fault of the breather valve, wherein the third preset time is greater than the first preset time.
That is, if the breather valve fails, for example: the breather valve blocks, may not carry out the atmospheric pressure balance inside the battery package and outside the battery package well, and consequently the pressure release time that the pressure release time is more normal will be some longer, consequently, when this time surpassed third scheduled time, can judge that the breather valve has broken down, consequently reports to the police, and the timely maintenance of suggestion relevant personnel is in order to guarantee the security and the reliability of battery package.
According to the sealing detection method of the battery pack, whether the sealing state of the battery pack is good or not can be effectively detected in real time, and early warning is carried out on the untight sealing of the battery pack, so that the safety and the reliability of the battery pack can be improved.
Fig. 5 is a block diagram of a structure of a seal detection system of a battery pack according to an embodiment of the present invention. As shown in fig. 5, a seal detection system 500 of a battery pack according to an embodiment of the present invention includes: a detection device 510, an inflator 520, and a controller 530.
The detection device 510 is used for detecting a sealing detection signal of the battery pack and a pressure signal in the sealed cavity. The inflation device 520 is used for inflating the sealed cavity. The controller 530 is respectively connected with the detection device 510 and the inflation device 520, so that when the detection device 510 detects a sealing detection signal of the battery pack, the inflation device 520 is controlled to inflate the sealed cavity to a first preset pressure, the inflation device 520 is controlled to stop inflating, when the breather valve releases the pressure of the sealed cavity to normal pressure, the pressure release time is recorded, when the pressure release time is judged to be less than a first preset time, the sealed cavity is determined to be air-leaking, and air-leaking alarm is performed.
In one embodiment of the present invention, the seal detection signal includes at least one of a first submergence depth sensor for detecting a first submergence signal, a charge signal collector for detecting a charge signal, and a switch for turning on a manual detection signal.
In one embodiment of the present invention, the sealing detection system 500 of the battery pack further includes: a second submergence depth sensor (not shown in fig. 5) for detecting a second submergence signal, wherein the controller 530 is connected to the second submergence depth sensor, so as to alarm the submergence of the battery pack when the second submergence depth sensor detects the second submergence signal, control the inflation device to inflate the air into the sealed cavity, and maintain the air pressure in the sealed cavity at the first predetermined pressure; a third immersion depth sensor (not shown in fig. 5) for detecting a third immersion signal, wherein the controller 530 is connected to the third immersion depth sensor to alarm vehicle immersion and disable the inflator when the third immersion depth sensor detects the third immersion signal, wherein the immersion depth corresponding to the second immersion signal is greater than the immersion depth corresponding to the first immersion signal, and the immersion depth corresponding to the third immersion signal is greater than the immersion depth corresponding to the second immersion signal.
In one embodiment of the present invention, the sealing detection system 500 of the battery pack further includes: a first humidity sensor (not shown in fig. 5) for detecting the humidity inside the sealed cavity, wherein the controller 530 is connected to the first humidity sensor to control the air charging device 520 to charge air into the sealed cavity when the first humidity sensor detects that the humidity inside the sealed cavity is greater than a first predetermined humidity, so as to dehumidify the inside of the sealed cavity by using the airflow formed by the air discharged from the breather valve; a drying device (not shown in fig. 5) disposed between the inflator 520 and the sealed chamber; a second humidity sensor (not shown in fig. 5) for detecting the humidity of the gas filled in the sealed cavity, wherein the controller 530 is connected to the second humidity sensor, so that when the inflation device 520 is controlled to inflate the gas filled in the sealed cavity, if the humidity of the gas filled in the sealed cavity is determined to be greater than a second predetermined humidity, the drying device is controlled to dry the gas filled in the sealed cavity.
In an embodiment of the present invention, the controller 530 is further configured to determine that the sealed cavity is air-leaked and perform an air-leakage alarm when the inflation time of the inflator 520 is determined to be greater than a second predetermined time.
In an embodiment of the present invention, the controller 530 is further configured to determine whether the pressure relief time is greater than a third predetermined time, and if so, determine that the breathing valve is failed, and perform a breathing valve failure alarm, where the third predetermined time is greater than the first predetermined time.
According to the sealing detection system of the battery pack, whether the sealing state of the battery pack is good or not can be effectively detected in real time, and early warning is carried out on the untight sealing of the battery pack, so that the safety and the reliability of the battery pack can be improved.
It should be noted that a specific implementation manner of the seal detection system of the battery pack according to the embodiment of the present invention is similar to a specific implementation manner of the seal detection method of the battery pack according to the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not described here in order to reduce redundancy.
Further, the embodiment of the invention discloses a vehicle provided with the sealing detection system of the battery pack according to any one of the above embodiments, wherein the vehicle is a pure electric vehicle or a hybrid electric vehicle. The vehicle is an electric vehicle or a hybrid vehicle (hybrid vehicle). The vehicle can effectively detect whether the sealing state of the battery pack is good or not in real time, and can give an early warning to untight sealing of the battery pack, so that the safety and reliability of the battery pack can be improved.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (13)
1. The battery pack sealing detection method is characterized by comprising a sealing cavity and a power battery positioned in the sealing cavity, wherein a breather valve is arranged on the sealing cavity, and the method comprises the following steps:
detecting whether a sealing detection signal of the battery pack is received;
if so, inflating the sealed cavity until the air pressure in the sealed cavity is increased to a first preset pressure from normal pressure, and stopping inflating;
the sealed cavity is decompressed through the breather valve until the air pressure in the sealed cavity is reduced to the normal pressure, and the decompression time is recorded;
judging whether the pressure relief time is less than a first preset time or not;
if yes, judging that the sealed cavity leaks air, and giving an air leakage alarm;
further comprising: detecting whether the humidity in the sealed cavity is greater than a first preset humidity; if yes, inflating the sealed cavity and exhausting air through the breather valve so as to dehumidify the sealed cavity through air flow;
judging whether the humidity of the gas filled in the sealed cavity is greater than a second preset humidity or not;
if yes, drying the gas filled in the sealed cavity.
2. The method of detecting a sealing of a battery pack according to claim 1, wherein the sealing detection signal includes at least one of a first flooding signal, a charging signal, and a manual detection signal.
3. The method of detecting a seal of a battery pack according to claim 2, further comprising:
detecting whether a second flooding signal is received;
if the first preset pressure is lower than the second preset pressure, a battery pack is soaked and alarmed, the sealed cavity is inflated until the air pressure in the sealed cavity is increased to the first preset pressure from the normal pressure, the air pressure in the sealed cavity is maintained at the first preset pressure, and the soaking depth corresponding to the second soaking signal is larger than the soaking depth corresponding to the first soaking signal.
4. The method of detecting a seal of a battery pack according to claim 3, further comprising:
detecting whether a third flooding signal is received;
and if so, carrying out vehicle flooding alarm and forbidding the inflation function in the sealed cavity, wherein the flooding depth corresponding to the third flooding signal is greater than the flooding depth corresponding to the second flooding signal.
5. The method for detecting the sealing of a battery pack according to claim 1, wherein, in the process of inflating the sealed cavity and stopping the inflation until the air pressure in the sealed cavity rises from the normal pressure to the first predetermined pressure, the method further comprises:
recording the inflation time;
judging whether the inflation time is greater than a second preset time;
if yes, judging that the sealed cavity leaks air, and giving an air leakage alarm.
6. The method of detecting the sealing of a battery pack according to any one of claims 1 to 5, further comprising:
judging whether the pressure relief time is greater than a third preset time;
if so, judging that the breather valve is in fault, alarming the fault of the breather valve,
wherein the third predetermined time is greater than the first predetermined time.
7. The utility model provides a sealed detecting system of battery package, its characterized in that, the battery package includes seal chamber and is located power battery in the seal chamber, the last breather valve that is equipped with of seal chamber, the system includes:
the detection device is used for detecting a sealing detection signal of the battery pack and a pressure signal in the sealing cavity;
the inflation device is used for inflating the sealed cavity;
the controller is respectively connected with the detection device and the inflation device, so that when the detection device detects a sealing detection signal of the battery pack, the inflation device is controlled to inflate the sealed cavity to a first preset pressure, the inflation device is controlled to stop inflating, when the breather valve releases the pressure of the sealed cavity to normal pressure, the pressure release time is recorded, when the pressure release time is judged to be smaller than the first preset time, the sealed cavity is judged to be air-leaked, and air leakage alarm is carried out;
further comprising: the controller is connected with the first humidity sensor so as to control the inflation device to inflate into the sealed cavity when the first humidity sensor detects that the humidity in the sealed cavity is higher than a first preset humidity, so that the air flow formed by the air exhaust of the breather valve is utilized to dehumidify the sealed cavity;
the drying device is arranged between the inflating device and the sealed cavity; and the second humidity sensor is used for detecting the humidity of the gas filled into the sealed cavity, and the controller is connected with the second humidity sensor so as to control the inflation device to inflate the gas into the sealed cavity, and control the drying device to dry the gas filled into the sealed cavity if the humidity of the gas filled into the sealed cavity is judged to be greater than a second preset humidity.
8. The system of claim 7, wherein the seal detection signal comprises at least one of a first submergence depth sensor for detecting a first submergence signal, a charge signal collector for detecting a charge signal, and a switch for turning on a manual detection signal.
9. The system for detecting sealing of a battery pack according to claim 8, further comprising:
a second depth sensor that soaks for detecting the second signal that soaks, the controller with the second depth sensor that soaks links to each other, so that the second depth sensor that soaks detects when the second signal that soaks, carry out the warning that soaks of battery package, and control aerating device to aerify in the sealed cavity, and will atmospheric pressure in the sealed cavity is maintained first predetermined pressure, wherein, the depth that soaks that the second signal that soaks corresponds is greater than and corresponds to the depth that soaks that the first signal that soaks corresponds.
10. The system for detecting sealing of a battery pack according to claim 9, further comprising:
a third immersion depth sensor for detecting a third immersion signal, the controller being connected to the third immersion depth sensor for performing a vehicle immersion alarm and disabling the inflator when the third immersion depth sensor detects the third immersion signal,
and the immersion depth corresponding to the third immersion signal is greater than the immersion depth corresponding to the second immersion signal.
11. The system of claim 7, wherein the controller is further configured to determine that the sealed cavity is leaking and alarm when the inflation time is greater than a second predetermined time according to the inflation time recorded by the inflator.
12. The system of any one of claims 7-11, wherein the controller is further configured to determine whether the pressure relief time is greater than a third predetermined time, and if so, determine that the breather valve is malfunctioning, and alarm the breather valve as to the malfunction, wherein the third predetermined time is greater than the first predetermined time.
13. A vehicle provided with a seal detection system for a battery pack according to any one of claims 7 to 12.
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| CN201610871932.2A CN107878204B (en) | 2016-09-30 | 2016-09-30 | Battery pack sealing detection method and system and vehicle |
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| CN109164219A (en) * | 2018-11-15 | 2019-01-08 | 广东铭利达科技有限公司 | A kind of battery pack housing compactness detection device |
| CN109547047B (en) * | 2018-11-20 | 2021-03-26 | Oppo广东移动通信有限公司 | Antenna tuning circuit and wireless communication equipment |
| CN113771627A (en) * | 2020-06-05 | 2021-12-10 | 北京新能源汽车股份有限公司 | Power battery pack air tightness monitoring method and device and electric automobile |
| CN111735707A (en) * | 2020-06-29 | 2020-10-02 | 天津市捷威动力工业有限公司 | Method and device for testing packaging strength of lithium ion soft package battery |
| CN113948813B (en) * | 2020-07-17 | 2024-02-06 | 上海汽车集团股份有限公司 | Explosion-proof control system and method for power battery |
| CN111982426B (en) * | 2020-07-22 | 2022-05-03 | 华人运通(江苏)动力电池系统有限公司 | Battery pack tightness detection method and device, electric vehicle and storage medium |
| CN112026523B (en) * | 2020-08-31 | 2022-01-18 | 蜂巢能源科技有限公司 | Battery pack sealing performance detection system and electric vehicle |
| CN114323470A (en) * | 2020-09-30 | 2022-04-12 | 奥动新能源汽车科技有限公司 | Electric connection device and water inlet detection method thereof |
| CN115569320B (en) * | 2021-06-21 | 2023-11-03 | 宇通客车股份有限公司 | Vehicle and battery fireproof device and control method thereof |
| CN113500917B (en) * | 2021-06-24 | 2023-04-28 | 烟台创为新能源科技股份有限公司 | Method for charging protective gas into lithium ion battery box |
| CN113670522A (en) * | 2021-07-29 | 2021-11-19 | 恒大新能源技术(深圳)有限公司 | Liquid leakage detection method, liquid leakage detection device, and liquid leakage detection system |
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Effective date of registration: 20190128 Address after: 213000 168 Huacheng Road, Jintan District, Changzhou, Jiangsu Applicant after: SVOLT Energy Technology Co.,Ltd. Address before: No. 2266 Chaoyang South Street, Baoding City, Hebei Province, 071000 Applicant before: GREAT WALL MOTOR Co.,Ltd. |
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Address after: No.8899 Xincheng Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: SVOLT Energy Technology Co.,Ltd. Address before: 213000 168 Huacheng Road, Jintan District, Changzhou, Jiangsu Patentee before: SVOLT Energy Technology Co.,Ltd. |