CN107402107A - For the device for detecting sealability of battery bag, method and battery bag - Google Patents
For the device for detecting sealability of battery bag, method and battery bag Download PDFInfo
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- CN107402107A CN107402107A CN201610341709.7A CN201610341709A CN107402107A CN 107402107 A CN107402107 A CN 107402107A CN 201610341709 A CN201610341709 A CN 201610341709A CN 107402107 A CN107402107 A CN 107402107A
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- Prior art keywords
- gas pressure
- battery bag
- current gas
- air pressure
- alarmed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention discloses a kind of for the device for detecting sealability of battery bag, method and battery bag.Described device includes：Air pressure acquisition module, it is configured as obtaining the current gas pressure in the battery bag；Control module, it is configured as when the current gas pressure meets default alert if, control warning device is alarmed.Thus, it can prevent from damaging battery pack because seriously intaking in battery bag, or fall ash in battery bag and influence the performance of battery pack, the sealing that can prompt staff's battery bag current effectively and in time there may be problem, thus it is easy to staff to take solution as early as possible, the effect for be finally reached and safeguard the optimum performance of battery bag, postponing the service life of battery bag.
Description
Technical field
The present invention relates to the sealing propertytest field of battery bag, in particular it relates to a kind of for battery bag
Device for detecting sealability, method and battery bag.
Background technology
Battery bag sealing water resistance is the important safety requirement of electrokinetic cell bag, in some cloth set
The battery bag put has strict degree of protection (IP grades) requirement.Such as the battery bag of bottom arrangement,
Its sealing grade has reached IP67.When the sealing of these battery bags does not reach requirement, can cause
Enter ash, even leak of making moist in battery bag.These situations can all cause battery system to be damaged, more sternly
Security incident is may result in again.Currently used battery bag method for conducting leak test is by detecting battery
Whether bag leaks electricity to judge sealing.However, there is certain defect in above-mentioned detection mode.For example, battery
Bag (certain potential point by water short circuit with vehicle body in battery pack) only in serious water inlet, can just leak
Electricity, it also can just detect that battery bag is leaked electricity, but often now, battery system has damaged.In addition, battery
Bag electric leakage is not necessarily caused by due to sealing bad water inlet, so when detecting electric leakage, can not be direct
Failure judgement reason is poor sealing, and also accurately and efficiently the sealing of battery bag cannot be entered
Row detection.
The content of the invention
It is an object of the invention to provide a kind of for the device for detecting sealability of battery bag, method and battery
Bag, to realize the accurately and efficiently detection to the sealing of battery bag.
To achieve these goals, the present invention provides a kind of device for detecting sealability for battery bag, should
Device includes：Air pressure acquisition module, it is configured as obtaining the current gas pressure in battery bag；Control module,
It is configured as when the current gas pressure meets default alert if, control warning device is alarmed.
Alternatively, the control module includes：First calculating sub module, it is configured as according to described current
Air pressure determines air pressure reduction rate, wherein, the air pressure reduction rate be the battery bag in initial gas pressure with
Air pressure change amount, detection time corresponding with the initial gas pressure between the current gas pressure are worked as to described
The ratio of time variation amount between detection time corresponding to preceding air pressure；First comparison sub-module, is configured
For the air pressure reduction rate and default reduction rate threshold value；First control submodule, is configured as
When the air pressure reduction rate is more than or equal to the reduction rate threshold value, control warning device is alarmed.
Alternatively, the control module includes：Second comparison sub-module, it is configured as current described in comparison
Air pressure and default air pressure threshold value；Second control submodule, be configured as the current gas pressure be less than or
During equal to the air pressure threshold value, the warning device is controlled to be alarmed.
Alternatively, the control module also includes：Second calculating sub module, it is configured to determine that from described
Between detection time corresponding to detection time to the current gas pressure corresponding to initial gas pressure in battery bag
Time variation amount；3rd comparison sub-module, be configured as time variation amount described in comparison with it is default when
Between be spaced；Second control submodule, it is configured as the current gas pressure and is less than or equal to the gas
When pressing threshold value and the time variation amount not less than the time interval, control warning device is alarmed.
Alternatively, second control submodule, it is configured as the current gas pressure and is less than or equal to institute
State air pressure threshold value and when the time variation amount is not less than the time interval, it is determined that with it is described when anaplasia
The corresponding alarm level of change amount, and control the warning device to be alarmed according to the alarm level.
Alternatively, the control module also includes：3rd control submodule, it is configured as described current
It is defeated when air pressure is less than or equal to the air pressure threshold value and the time variation amount and exceedes the time interval
Go out to be directed to the maintenance prompt message of the battery bag.
Alternatively, described device also includes：Temperature acquisition module, it is configured as obtaining in the battery bag
Current Temperatures；Atmospheric pressure compensating module, it is configured as entering the current gas pressure according to the Current Temperatures
Trip temperature compensates, the current gas pressure after being compensated；The control module, is configured as after compensation
When the current gas pressure meets default alert if, control warning device is alarmed.
The present invention also provides a kind of battery bag, and pressure test device and cell tube are provided with the battery bag
Reason system, wherein, the pressure test device is configured as detecting the current gas pressure in the battery bag,
The battery management system is included according to the device for detecting sealability provided by the invention.
Alternatively, set in the package surface of the battery bag formed with air-filled pore, the outside of the air-filled pore
There is the seal for sealing the air-filled pore.
Alternatively, unidirectional charge valve is provided with the air-filled pore.
Alternatively, the seal includes annular sidewall and closure, and the annular sidewall fills around described
Stomata is set and one end is tightly connected with the package surface, and the closure is threaded in the annular
The other end of side wall.
Alternatively, the inner surface setting of the closure has sealing gasket.
Alternatively, temperature-detecting device is provided with the battery bag, is configured as detecting the battery bag
Interior Current Temperatures.
The present invention also provides a kind of method for conducting leak test for battery bag, and this method includes：Obtain institute
State the current gas pressure in battery bag；Alarmed when the current gas pressure meets default alert if.
Alternatively, described the step of being alarmed when the current gas pressure meets default alert if, wraps
Include：Air pressure reduction rate is determined according to the current gas pressure, wherein, the air pressure reduction rate is the battery
It is the air pressure change amount between initial gas pressure and the current gas pressure in bag, corresponding with the initial gas pressure
The ratio of time variation amount between detection time corresponding to detection time to the current gas pressure；Compare institute
State air pressure reduction rate and default reduction rate threshold value；When the air pressure reduction rate is more than or equal to the reduction
Alarmed during rate threshold value.
Alternatively, described the step of being alarmed when the current gas pressure meets default alert if, wraps
Include：Compare the current gas pressure and default air pressure threshold value；Described in being less than or equal to when the current gas pressure
Alarmed during air pressure threshold value.
Alternatively, described the step of being alarmed when the current gas pressure meets default alert if, goes back
Including：It is determined that detection time is corresponding to the current gas pressure corresponding to initial gas pressure out of described battery bag
Detection time between time variation amount；Compare the time variation amount and default time interval；With
And described the step of being alarmed when the current gas pressure is less than or equal to the air pressure threshold value, includes：When
The current gas pressure is less than or equal to the air pressure threshold value and the time variation amount is not less than the time
Alarmed during interval.
Alternatively, it is described when the current gas pressure be less than or equal to the air pressure threshold value and it is described when anaplasia
The step of being alarmed when change amount is not less than the time interval includes：When the current gas pressure is less than or waits
When the air pressure threshold value and the time variation amount are not less than the time interval, it is determined that with it is described when
Between the corresponding alarm level of variable quantity；Alarmed according to the alarm level.
Alternatively, methods described also includes：When the current gas pressure be less than or equal to the air pressure threshold value,
And the time variation amount is when exceeding the time interval, maintenance prompt message of the output for battery bag.
Alternatively, methods described also includes：Obtain the Current Temperatures in the battery bag；Worked as according to described
Preceding temperature carries out temperature-compensating, the current gas pressure after being compensated to the current gas pressure；It is described described
Current gas pressure meets to include the step of alarm during default alert if：It is described current after compensation
Air pressure meets to be alarmed during default alert if.
In the above-mentioned technical solutions, the sealing of battery bag is judged by detecting the air pressure change in battery bag
Property, and alarmed when the current gas pressure in battery bag meets default alert if, it can prevent
Damaged because seriously being intake in battery bag in battery pack, or battery bag and fall ash and influence the property of battery pack
Can, the sealing that can prompt staff's battery bag current effectively and in time there may be problem, by
This is easy to staff to take solution as early as possible, is finally reached the optimum performance for safeguarding battery bag, delay
The effect of the service life of battery bag.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing be for providing a further understanding of the present invention, and a part for constitution instruction, with
Following embodiment is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 shows the structural representation of the battery bag according to one embodiment of the present invention.
Fig. 2 shows the device for detecting sealability for battery bag according to one embodiment of the present invention
Block diagram.
Fig. 3 shows the device for detecting sealability for battery bag according to another embodiment of the present invention
Block diagram.
Fig. 4 shows the device for detecting sealability for battery bag according to another embodiment of the present invention
Block diagram.
Fig. 5 shows the device for detecting sealability for battery bag according to another embodiment of the present invention
Block diagram.
Fig. 6 shows the device for detecting sealability for battery bag according to another embodiment of the present invention
Block diagram.
Fig. 7 shows the device for detecting sealability for battery bag according to another embodiment of the present invention
Block diagram.
Fig. 8 shows the partial structural diagram of the battery bag according to another embodiment of the present invention.
Fig. 9 shows the partial structural diagram of the battery bag according to another embodiment of the present invention.
Figure 10 shows the sealing propertytest side for battery bag according to one embodiment of the present invention
The flow chart of method.
Figure 11 shows the sealing propertytest side for battery bag according to another embodiment of the present invention
The flow chart of method.
Figure 12 shows the sealing propertytest side for battery bag according to another embodiment of the present invention
The flow chart of method.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Embodiment described herein is merely to illustrate and explain the present invention, and is not limited to this hair
It is bright.
Fig. 1 shows the structural representation of the battery bag according to one embodiment of the present invention.Such as Fig. 1
Shown, the battery bag 10 can include：Battery pack 101, inclusion 102 and battery management system (BMS)
103, wherein, BMS 103 and battery pack 101 are arranged in inclusion 102.BMS 103 can be used for
Battery management is carried out to battery pack 101, such as included but is not limited to：Cell voltage, temperature and electric current are adopted
Sample, battery balanced, charging, electric discharge management etc..In addition, as shown in figure 1, in battery bag 10 also
Pressure test device 104 is provided with, the pressure test device 104 can be configured as detecting battery bag 10
Interior air pressure.So, can be monitored in real time by pressure test device 104 current in battery bag 10
Air pressure.In addition, device for detecting sealability can be configured with BMS 103, the device for detecting sealability energy
It is enough to obtain the current gas pressure that pressure test device 104 detects in real time, and battery is judged according to current gas pressure
Whether bag 10 occurs gas leakage, and then detects the sealing of battery bag 10.Sealing inspection is described below in detail
Survey device is that the principle and process of sealing propertytest how are carried out according to air pressure.
Fig. 2 shows the device for detecting sealability for battery bag according to one embodiment of the present invention
20 block diagram, wherein, the device for detecting sealability 20 can be configured at battery management system BMS 103
In.As shown in Fig. 2 the detection means 20 can include：Air pressure acquisition module 201, it is configured as obtaining
Take the current gas pressure in battery bag 10.For example, as it was previously stated, can be by being arranged in battery bag 10
Pressure test device 104 detect the current gas pressure in the battery bag 10 in real time, so, air pressure obtains
Modulus block 201 can obtain the current gas pressure from the pressure test device 104.In addition, such as Fig. 2 institutes
Show, the detection means 20 can also include：Control module 202, it is configured as meeting in advance in current gas pressure
If alert if when, control warning device 30 alarmed.
In one embodiment, can be before the encapsulation to battery bag 10 be completed, to battery bag 10
Inside it is inflated, so that the air pressure in battery bag 10 is higher than ambient pressure.After being inflated, can incite somebody to action
The battery bag 10 is packaged.So, the initial gas pressure in battery bag 10 is higher than ambient pressure.Once
Breakage occurs for the poor sealing or battery bag 10 of battery bag 10, and battery bag 10 can occur gas leakage and show
As so that the air pressure step-down in battery bag 10.Thus, control module 202 can be according to air pressure change
Judge the sealing of battery bag 10, and control warning device 30 to alarm, present battery bag 10 is warned with this
Sealing it is poor.
For example, in one embodiment, control module 202 can pass through this parameter of air pressure reduction rate
Index judges whether current gas pressure meets default alert if.Specifically, as shown in figure 3, the control
Molding block 202 can include：First calculating sub module 2021, is configured as determining gas according to current gas pressure
Reduction rate is pressed, wherein, the air pressure reduction rate is between initial gas pressure and current gas pressure in battery bag 10
Air pressure change amount, detection time corresponding with initial gas pressure is between detection time corresponding to current gas pressure
Time variation amount ratio.It is for instance possible to use below equation represents the calculating side of air pressure reduction rate
Formula：
Wherein, S represents air pressure reduction rate, P0The initial gas pressure in battery bag 10 is represented, P represents battery
Current gas pressure in bag 10, Δ P represent the initial gas pressure P in battery bag 100Between current gas pressure P
Air pressure change amount, T0Represent initial gas pressure P0Corresponding detection time, T represent that current gas pressure P is corresponding
Detection time, Δ T represents initial gas pressure P0Detected corresponding to corresponding detection time to current gas pressure P
Time variation amount between time.In addition, the initial gas pressure P in battery bag 100Can be in completion pair
After being inflated in battery bag 10, the air pressure of form in the battery bag 10.Air pressure reduction rate S can be anti-
The speed of air pressure reduction is mirrored, it can be the form of percentage.
In addition, the control module 202 can also include：First comparison sub-module 2022, it is configured as comparing
Compared with the air pressure reduction rate and default reduction rate threshold value；First control submodule 2023, is configured as gas
When pressure reduction rate is more than or equal to reduction rate threshold value, control warning device 30 is alarmed.
For example, when breakage occurs for battery bag 10, the air pressure in battery bag 10 can reduce rapidly, i.e.
Air pressure declines obvious within the less period.Can be by comparing air pressure reduction rate and default reduction rate
Threshold value, to detect the sealing of battery bag 10.When air pressure reduction rate is more than or equal to reduction rate threshold value,
Illustrate air pressure in battery bag 10 in a short time just there occurs the decline of obvious air pressure, now battery bag
10 are likely to damaged.First control submodule 2023 can determine that current gas pressure meets default alarm bar
Part, and control warning device 30 to be alarmed, warn staff's battery bag 10 damaged with this, it is close
Envelope property is poor, answers on-call maintenance.
Sometimes, when the sealing in battery bag 10 goes wrong, the air pressure in battery bag 10 can't
Obvious air pressure occurs in a short time to decline, but slowly declines.Now, air pressure is may result in subtract
Small rate is not above reduction rate threshold value.In order to adapt to such case, in another embodiment of the invention,
As shown in figure 4, control module 202 can include：Second comparison sub-module 2024, is configured as comparing
Current gas pressure and default air pressure threshold value.Wherein, the air pressure threshold value can be based on ambient pressure setting, example
Such as, the air pressure threshold value can be set to be slightly larger than ambient pressure.In addition, control module 202 can be with
Including：Second control submodule 2025, it is configured as the current gas pressure and is less than or equal to the air pressure
During threshold value, control warning device 30 is alarmed.
When the air pressure in battery bag 10 is gradually lowered to default air pressure threshold value, show in battery bag 10
The gas of injection is gradually from the internal leakage of battery bag 10 so that and the air pressure in battery bag 10 tends to ambient pressure,
Now, the second control submodule 2025 can determine that current gas pressure meets alert if, control alarm dress
Put 30 to be alarmed, warn staff's battery bag 10 phenomenon of leaking slowly occur with this, sealing occurs
Problem, it should detect and repair in time.
Under normal circumstances, over time, the air pressure in battery bag 10 can be reduced gradually, for example,
It is reduced to the level of the air pressure threshold value.That is, in this case, the gas in battery bag 10
Pressure is reduced to air pressure threshold value and belongs to normal phenomenon, can not illustrate it is that sealing there is a problem.Therefore,
In view of this case, in another embodiment of the present invention, as shown in figure 5, the control module 202
It can also include：Second calculating sub module 2026, the initial gas being configured to determine that out of battery bag 10
Time variation amount between detection time corresponding to detection time to current gas pressure corresponding to pressure；3rd compares
Submodule 2027, it is configured as comparing the time variation amount and default time interval.In this case,
Second control submodule 2025 can be further configured to when the current gas pressure is less than or equal to air pressure
Threshold value and when the time variation amount is not less than the time interval, then control warning device 30 to carry out
Alarm.Wherein, the time interval can be set according to the actually required maintenance period of battery bag 10.
That is, in this embodiment, if dropped to from initial gas pressure less than or equal to air pressure threshold value
The duration that is undergone of current gas pressure not less than default time interval, then may indicate that in battery bag 10
Gas slowly leakage, now meet default alert if, the second control submodule 2025 can be controlled
Warning device 30 processed is alarmed, close to warn staff's battery bag 10 phenomenon leaked slowly occur
Envelope property is likely to occur problem, should detect and repair in time.
In addition, in another embodiment, the second control submodule 2025 can be further configured to
When the current gas pressure be less than or equal to the air pressure threshold value and the time variation amount not less than it is described when
Between when being spaced, it is determined that the alarm level corresponding with the time variation amount, and control warning device 30 to press
Alarmed according to identified alarm level.Wherein, time variation amount can be into inverse correlation with alarm level
Relation, that is to say, that time variation amount is smaller, and alarm level is higher, so represent battery bag 10
Sealing it is poorer.
In the present invention, warning device 30 can be, for example, the warning device of diversified forms, for example, sound
Sound alarm, visual alarm etc..As described above, the second control submodule 2025 can be described
Current gas pressure is less than or equal to the air pressure threshold value and the time variation amount is not less than the time interval
When, it is determined that the alarm level corresponding with the time variation amount.It is voice guard in warning device 30
Embodiment in, the alarm level can be, for example, audible frequency, wherein, time variation amount is smaller,
Audible frequency is bigger.In addition, in the embodiment that warning device 30 is visual alarm, the alarm
Grade can be, for example, glow frequency, wherein, time variation amount is smaller, and glow frequency is bigger.So,
The classifying alarm of the sealing to battery bag 10 can be realized, so that staff can be according to alarm etc.
Level more intuitively judges the degree of the poor sealing of present battery bag 10.
In addition, in another embodiment of the present invention, as shown in fig. 6, control module 202 can be with
Including：3rd control submodule 2028, it is configured as the current gas pressure and is less than or equal to the air pressure
Threshold value and when the time variation amount exceedes the time interval, output is for the battery bag 10
Maintain prompt message.For example, can be configured with suggestion device in battery bag 10, the suggestion device can
To be, for example, indicator lamp, display screen, buzzer etc..3rd control submodule 2028 can be worked as when described
When preceding air pressure is less than or equal to the air pressure threshold value and the time variation amount and exceedes the time interval,
To suggestion device output for the battery bag 10 maintenance prompt message, with by the suggestion device to
User prompts battery bag 10 to need to be maintained.
That is, in this embodiment, if dropped to from initial gas pressure less than or equal to air pressure threshold value
The duration that is undergone of current gas pressure exceeded default time interval, then may indicate that battery bag 10 is worked as
Preceding usage time for a long time and needs to be maintained, and now produces and is battery bag compared with the reason for low pressure
10 usage time is long, and its air pressure, which is gradually reduced, belongs to normal phenomenon, therefore, in this case,
It need not be alarmed, but export the maintenance prompt message for the battery bag 10, so as to carry
Show that staff's battery bag 10 is currently needed for carrying out care and maintenance., can be again after maintenance
The sealing to battery bag 10 is realized to being inflated in battery bag 10, and again according to aforesaid way
Monitoring.
In the application scenarios of reality, air pressure is influenced by temperature toward contact, and air pressure change varies with temperature
The relation being proportionate, that is to say, that temperature is higher, and air pressure is bigger, conversely, temperature is lower, air pressure
It is smaller.Because corresponding temperature is corresponding with initial gas pressure when pressure test device 104 detects current gas pressure
Temperature may be different, it is thus impossible to directly by current gas pressure compared with initial gas pressure.On the other hand,
In yet another embodiment of the present invention, in order to eliminate the influence that temperature detects to air pressure, such as Fig. 7 institutes
Show, be additionally provided with temperature-detecting device in battery bag 10 provided by the invention, the temperature-detecting device
It is configured as detecting the Current Temperatures in the battery bag, and the Current Temperatures is sent to detection means 20.
Correspondingly, can also include in detection means 20 provided by the invention：Temperature acquisition module 203, quilt
It is configured to obtain the Current Temperatures in battery bag 10；Atmospheric pressure compensating module 204, it is configured as according to
Current Temperatures carry out temperature-compensating, the current gas pressure after being compensated to the current gas pressure.In this feelings
Under condition, the control module 202 can be configured as the current gas pressure after compensation and meet default alarm
During condition, control warning device 30 is alarmed.How to judge whether the current gas pressure after compensation meets
The mode of default alert if judges with the current gas pressure described above to not carrying out temperature-compensating
It is no meet default alert if mode it is identical, difference is only in that the former is to be directed to temperature-compensating
Current gas pressure afterwards, the latter are the current gas pressure for not carrying out temperature-compensating, therefore, its concrete principle
And process just repeats no more herein.
In the above-mentioned technical solutions, the sealing of battery bag is judged by detecting the air pressure change in battery bag
Property, and alarmed when the current gas pressure in battery bag meets default alert if, it can prevent
Damaged because seriously being intake in battery bag in battery pack, or battery bag and fall ash and influence the property of battery pack
Can, the sealing that can prompt staff's battery bag current effectively and in time there may be problem, by
This is easy to staff to take solution as early as possible, is finally reached the optimum performance for safeguarding battery bag, delay
The effect of the service life of battery bag.
As set forth above, it is possible to before the encapsulation of battery bag 10 is completed, to being inflated in battery bag 10,
To realize according to the sealing propertytest provided by the invention based on air pressure change.It is inflated for convenience,
In a preferred embodiment of the present invention, as shown in figure 8, battery bag 10 the table of inclusion 102
Face is provided with for sealing the air-filled pore 105 formed with air-filled pore 105, the outside of the air-filled pore 105
Seal 106.So, can be realized by air-filled pore 105 from outside to being filled in battery bag 10
Gas, and after being inflated, the air-filled pore 105 is sealed by seal 106.So, can cause
Air pressure in battery bag 10 keeps relatively high level, for example, being higher than ambient pressure.
In addition, as shown in figure 9, the present invention an optional embodiment in, in air-filled pore 105
On be provided with unidirectional charge valve 107.In addition, as shown in figure 9, the seal 106 can include ring
Shape side wall 109 and closure 110, the annular sidewall 109 are set and one around the air-filled pore 105
End is connected with the face seal of the inclusion 102, and the closure 110 is threaded in the annular side
The other end of wall 109.
By increasing the unidirectional charge valve 107 of with closure 110, it can prevent the air pressure in inclusion from reducing,
Can conveniently it inflate simultaneously.In the case of the good seal of battery bag 10, reduce aqueous vapor and penetrate into bag
Possibility.
In addition, as shown in figure 9, for the sealing of further lift-off seal lid 110, in closure 110
Inner surface setting have sealing gasket 111, thus, it is possible to farthest improve battery bag 10 sealing.
Figure 10 shows the sealing propertytest side for battery bag according to one embodiment of the present invention
The flow chart of method.As shown in Figure 10, this method can include：
In step S1001, the current gas pressure in battery bag is obtained；
In step S1002, alarmed when current gas pressure meets default alert if.
Thus, the sealing of battery bag is judged by detecting the air pressure change in battery bag, and when electricity
Current gas pressure in the bag of pond meets to be alarmed during default alert if, can prevent because tight in battery bag
Intake again and damage battery pack, or fall in battery bag ash and influence the performance of battery pack, can effectively and
The sealing for prompting staff's battery bag current in time there may be problem, thus be easy to staff
Solution is taken as early as possible, is finally reached the optimum performance for safeguarding battery bag, the use longevity of delay battery bag
The effect of life.
Figure 11 shows the sealing propertytest side for battery bag according to another embodiment of the present invention
The flow chart of method.As shown in figure 11, this method can include：
In step S1101, the current gas pressure in battery bag is obtained.
In step S1102, air pressure reduction rate is determined according to the current gas pressure, wherein, the air pressure
Air pressure change amount and institute of the reduction rate between the initial gas pressure in the battery bag and the current gas pressure
State the when anaplasia between detection time corresponding to detection time corresponding to initial gas pressure to the current gas pressure
The ratio of change amount.
In step S1103, the air pressure reduction rate and default reduction rate threshold value.When the gas
When pressure reduction rate is more than or equal to the reduction rate threshold value, step S1104 is performed, otherwise, performs step
S1105。
In step S1104, alarmed.
In step S1105, the current gas pressure and default air pressure threshold value.When the current gas
When pressure is less than or equal to the air pressure threshold value, step S1106, otherwise, return to step S1101 are performed.
In step S1106, it is determined that detection time corresponding to initial gas pressure out of described battery bag is to institute
State the time variation amount between detection time corresponding to current gas pressure.
In step S1107, the time variation amount and default time interval.When the time
When variable quantity is not less than the time interval, step S1108 is performed, otherwise, performs step S1110.
In step S1108, it is determined that the alarm level corresponding with the time variation amount.
In step S1109, alarmed according to the alarm level.
In step S1110, maintenance prompt message of the output for the battery bag.
Pass through above method, it is possible to achieve the maintenance of classifying alarm and battery bag to battery bag sealing
Prompting, consequently facilitating staff is detected to battery bag, maintained in time so that battery bag
Keep optimum performance and extend the service life of battery bag.
Figure 12 shows the sealing propertytest side for battery bag according to another embodiment of the present invention
The flow chart of method.As shown in figure 12, this method can include：
In step S1201, the current gas pressure in battery bag is obtained；
In step S1202, the Current Temperatures in battery bag are obtained；
In step S1203, temperature-compensating is carried out to the current gas pressure according to the Current Temperatures, obtained
Current gas pressure after to compensation；
In step S1204, the current gas pressure after compensation meets to carry out during default alert if
Alarm.
How to judge whether the current gas pressure after compensation meets that the mode of default alert if is same and retouch above
That states judges whether the mode phase for meeting default alert if to the current gas pressure that does not carry out temperature-compensating
Together, difference is only in that the former is to be directed to the current gas pressure after temperature-compensating, and the latter is for not entering
The current gas pressure of trip temperature compensation, therefore, its concrete principle and process just repeat no more herein.
By above method, the influence that temperature detects to air pressure can be eliminated, so as to improve battery bag
Sealing propertytest accuracy and reliability.
On the method in above-described embodiment, wherein each concrete mode for performing operation is in relevant inspection
Survey in the embodiment of device and be described in detail, explanation will be not set forth in detail herein.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, it is still, of the invention and unlimited
Detail in above-mentioned embodiment, can be to the present invention in the range of the technology design of the present invention
Technical scheme carry out a variety of simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned embodiment is special
Sign, in the case of reconcilable, can be combined by any suitable means.In order to avoid need not
The repetition wanted, the present invention no longer separately illustrate to various combinations of possible ways.
In addition, various embodiments of the present invention can be combined randomly, as long as its
Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (20)
1. a kind of device for detecting sealability for battery bag, it is characterised in that described device includes：
Air pressure acquisition module, it is configured as obtaining the current gas pressure in the battery bag；
Control module, it is configured as when the current gas pressure meets default alert if, control alarm
Device is alarmed.
2. device for detecting sealability according to claim 1, it is characterised in that the control mould
Block includes：
First calculating sub module, it is configured as determining air pressure reduction rate according to the current gas pressure, wherein,
The air pressure reduction rate is that the air pressure between initial gas pressure and the current gas pressure in the battery bag becomes
Change amount, detection time corresponding with the initial gas pressure are between detection time corresponding to the current gas pressure
Time variation amount ratio；
First comparison sub-module, it is configured as air pressure reduction rate described in comparison and default reduction rate threshold value；
First control submodule, it is configured as the air pressure reduction rate and is more than or equal to the reduction rate threshold
During value, the warning device is controlled to be alarmed.
3. device for detecting sealability according to claim 1, it is characterised in that the control mould
Block includes：
Second comparison sub-module, it is configured as current gas pressure described in comparison and default air pressure threshold value；
Second control submodule, it is configured as the current gas pressure and is less than or equal to the air pressure threshold value
When, control the warning device to be alarmed.
4. device for detecting sealability according to claim 3, it is characterised in that the control mould
Block also includes：
Second calculating sub module, it is configured to determine that detection corresponding to the initial gas pressure out of described battery bag
Time variation amount between detection time corresponding to time to the current gas pressure；
3rd comparison sub-module, it is configured as time variation amount described in comparison and default time interval；
Second control submodule, it is configured as the current gas pressure and is less than or equal to the air pressure threshold
Value and the time variation amount not less than the time interval when, control the warning device to be alarmed.
5. device for detecting sealability according to claim 4, it is characterised in that second control
System module, it is configured as the current gas pressure and is less than or equal to the air pressure threshold value and the time
When variable quantity is not less than the time interval, it is determined that the alarm level corresponding with the time variation amount,
And the warning device is controlled to be alarmed according to the alarm level.
6. device for detecting sealability according to claim 4, it is characterised in that the control mould
Block also includes：
3rd control submodule, be configured as the current gas pressure less than or equal to the air pressure threshold value,
And the time variation amount is when exceeding the time interval, maintenance prompting letter of the output for the battery bag
Breath.
7. according to the device for detecting sealability any one of claim 1-6, it is characterised in that
Described device also includes：
Temperature acquisition module, it is configured as obtaining the Current Temperatures in the battery bag；
Atmospheric pressure compensating module, it is configured as entering the current gas pressure according to the Current Temperatures trip temperature benefit
Repay, the current gas pressure after being compensated；
The control module, it is configured as the current gas pressure after compensation and meets default alert if
When, control warning device is alarmed.
8. a kind of battery bag, it is characterised in that be provided with pressure test device and electricity in the battery bag
Pond management system, wherein, the pressure test device is configured as detecting the current gas in the battery bag
Pressure, the battery management system include the sealing propertytest dress according to any one of claim 1-7
Put.
9. battery bag according to claim 8, it is characterised in that in the inclusion of the battery bag
Surface is provided with the seal for sealing the air-filled pore formed with air-filled pore on the outside of the air-filled pore.
10. battery bag according to claim 9, it is characterised in that set on the air-filled pore
There is unidirectional charge valve.
11. the battery bag according to claim 9 or 10, it is characterised in that the seal bag
Annular sidewall and closure are included, the annular sidewall is set around the air-filled pore and one end and the inclusion
Face seal connects, and the closure is threaded in the other end of the annular sidewall.
12. battery bag according to claim 11, it is characterised in that the interior table of the closure
Face is provided with sealing gasket.
13. battery bag according to claim 8, it is characterised in that be provided with the battery bag
Temperature-detecting device, it is configured as detecting the Current Temperatures in the battery bag.
14. a kind of method for conducting leak test for battery bag, it is characterised in that methods described includes：
Obtain the current gas pressure in the battery bag；
Alarmed when the current gas pressure meets default alert if.
15. method for conducting leak test according to claim 14, it is characterised in that described in institute
Current gas pressure is stated to meet to include the step of alarm during default alert if：
Air pressure reduction rate is determined according to the current gas pressure, wherein, the air pressure reduction rate is the battery
It is the air pressure change amount between initial gas pressure and the current gas pressure in bag, corresponding with the initial gas pressure
The ratio of time variation amount between detection time corresponding to detection time to the current gas pressure；
Compare the air pressure reduction rate and default reduction rate threshold value；
Alarmed when the air pressure reduction rate is more than or equal to the reduction rate threshold value.
16. method for conducting leak test according to claim 14, it is characterised in that described in institute
Current gas pressure is stated to meet to include the step of alarm during default alert if：
Compare the current gas pressure and default air pressure threshold value；
Alarmed when the current gas pressure is less than or equal to the air pressure threshold value.
17. method for conducting leak test according to claim 16, it is characterised in that described in institute
Current gas pressure is stated to meet also to include the step of alarm during default alert if：
It is determined that detection time is corresponding to the current gas pressure corresponding to initial gas pressure out of described battery bag
Detection time between time variation amount；
Compare the time variation amount and default time interval；And
Described the step of being alarmed when the current gas pressure is less than or equal to the air pressure threshold value, includes：
When the current gas pressure is less than or equal to the air pressure threshold value and the time variation amount is not less than institute
Alarmed when stating time interval.
18. method for conducting leak test according to claim 17, it is characterised in that described to work as institute
Current gas pressure is stated less than or equal to the air pressure threshold value and the time variation amount is not less than between the time
Every when alarmed the step of include：
When the current gas pressure is less than or equal to the air pressure threshold value and the time variation amount is not less than institute
When stating time interval, it is determined that the alarm level corresponding with the time variation amount；
Alarmed according to the alarm level.
19. method for conducting leak test according to claim 17, it is characterised in that methods described
Also include：
When the current gas pressure is less than or equal to the air pressure threshold value and the time variation amount is more than described
During time interval, maintenance prompt message of the output for the battery bag.
20. according to the method for conducting leak test any one of claim 14-19, it is characterised in that
Methods described also includes：
Obtain the Current Temperatures in the battery bag；
Temperature-compensating, the current gas after being compensated are carried out to the current gas pressure according to the Current Temperatures
Pressure；
Described the step of being alarmed when the current gas pressure meets default alert if, includes：
The current gas pressure after compensation meets to be alarmed during default alert if.
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| CN201610341709.7A CN107402107B (en) | 2016-05-20 | 2016-05-20 | Device and method for detecting sealing performance of battery pack and battery pack |
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| CN201610341709.7A CN107402107B (en) | 2016-05-20 | 2016-05-20 | Device and method for detecting sealing performance of battery pack and battery pack |
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| CN109506856A (en) * | 2018-12-12 | 2019-03-22 | 东风时代(武汉)电池系统有限公司 | Battery pack air-tightness detection method |
| CN109521365A (en) * | 2018-12-04 | 2019-03-26 | 远东福斯特新能源江苏有限公司 | Power battery box body protective capacities detection device and its detection method |
| CN110427305A (en) * | 2019-08-06 | 2019-11-08 | Oppo广东移动通信有限公司 | Battery gas leak treatment method and apparatus, electronic equipment, readable storage medium storing program for executing |
| CN113252245A (en) * | 2021-06-02 | 2021-08-13 | 蜂巢能源科技有限公司 | Moisture resistance test method and moisture resistance test system for sealing member of battery pack |
| CN113823847A (en) * | 2020-06-18 | 2021-12-21 | 郑州宇通客车股份有限公司 | Safety management method and device for battery system |
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| CN117346946A (en) * | 2023-11-29 | 2024-01-05 | 宁德时代新能源科技股份有限公司 | Air pressure sampling circuit, method, battery management system and power utilization device |
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| CN109521365A (en) * | 2018-12-04 | 2019-03-26 | 远东福斯特新能源江苏有限公司 | Power battery box body protective capacities detection device and its detection method |
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| CN110427305A (en) * | 2019-08-06 | 2019-11-08 | Oppo广东移动通信有限公司 | Battery gas leak treatment method and apparatus, electronic equipment, readable storage medium storing program for executing |
| CN113823847B (en) * | 2020-06-18 | 2023-09-01 | 宇通客车股份有限公司 | Safety management method and device for battery system |
| CN113823847A (en) * | 2020-06-18 | 2021-12-21 | 郑州宇通客车股份有限公司 | Safety management method and device for battery system |
| WO2022017059A1 (en) * | 2020-07-23 | 2022-01-27 | 华为技术有限公司 | Fire extinguishing system and fault determining method |
| CN113252245A (en) * | 2021-06-02 | 2021-08-13 | 蜂巢能源科技有限公司 | Moisture resistance test method and moisture resistance test system for sealing member of battery pack |
| CN114646433A (en) * | 2021-08-11 | 2022-06-21 | 宇通客车股份有限公司 | Vehicle and air tightness detection method of battery pack of vehicle |
| DE102023203561A1 (en) | 2023-04-19 | 2024-02-22 | Vitesco Technologies GmbH | Method, control device and computer program for detecting a fault in a battery device of a vehicle as well as fault detection device and battery device |
| CN117346946A (en) * | 2023-11-29 | 2024-01-05 | 宁德时代新能源科技股份有限公司 | Air pressure sampling circuit, method, battery management system and power utilization device |
| CN117346946B (en) * | 2023-11-29 | 2024-05-03 | 宁德时代新能源科技股份有限公司 | Air pressure sampling circuit, method, battery management system and power utilization device |
| CN117848627A (en) * | 2024-03-06 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Air tightness detection method, air tightness detection device, storage medium, battery system and electricity utilization device |
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