CN208140894U - Internal resistance of cell detection device and portable device - Google Patents
Internal resistance of cell detection device and portable device Download PDFInfo
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- CN208140894U CN208140894U CN201820622893.7U CN201820622893U CN208140894U CN 208140894 U CN208140894 U CN 208140894U CN 201820622893 U CN201820622893 U CN 201820622893U CN 208140894 U CN208140894 U CN 208140894U
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Abstract
The utility model discloses a kind of internal resistance of cell detection devices and portable device, described device to include：Battery voltage acquisition circuit, battery voltage acquisition circuit are connected with battery, to acquire the voltage at battery both ends in real time；Controllable switch and internal resistance of cell detection load, internal resistance of cell detection load are connected to battery by controllable switch；Controller, controller are connected with the control terminal of battery voltage acquisition circuit and controllable switch respectively, are opened or closed to control controllable switch；Wherein.When controllable switch disconnects, battery voltage acquisition circuit obtains the first cell voltage, in controllable switch closure, battery voltage acquisition circuit obtains the second cell voltage, controller obtains the internal resistance of battery according to internal resistance of cell detection load, the first cell voltage and the second cell voltage, and thereby, it is possible to simply and effectively measure the internal resistance of battery, the problem of effectively preventing battery capacity caused by measuring inaccuracy because of the internal resistance of cell and show mistake, or even cannot be started up.
Description
Technical field
The utility model relates to portable device technologies field, in particular to a kind of internal resistance of cell detection device and a kind of tool
There is the portable device of the device.
Background technique
Do not have to since dry cell is long placed in after a period of use, battery can be reacted because of internal chemical, so that the voltage at both ends
The internal resistance of virtual height, battery increases, this phenomenon be commonly referred to as empty electricity.For portable device, the internal resistance caused by battery is because of empty electricity
When increase, load current becomes larger, and may cause equipment can not start.Meanwhile this empty electricity often makes electronic equipment generate mistake
Sentence to show the electricity of mistake, the reason of this erroneous judgement occur is：It is simple that the electricity of many electronic equipments, which is shown, on the market
Corresponding battery capacity is converted by measurement cell voltage.For example, empty piezoelectric voltage may cause practical electricity and there was only 20%, and show
The electricity shown is 90%, and after using the short period, the electricity of display rapidly drops to 20% from 90%, brings to user constant
And puzzlement, influence user experience.
In the related technology, the internal resistance detection method of battery is that battery is taken out from the device, then uses special internal resistance
Detector is detected.Although this method can detecte out the internal resistance of battery, but complicated for operation, and need additional equipment
Detection.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose a kind of internal resistance of cell detection device with first novel purpose, can simply and effectively detects the interior of battery
Resistance, so that effectively preventing battery capacity caused by measuring inaccuracy because of the internal resistance of cell shows mistake, or even cannot be started up
Problem substantially increases user experience.
Second purpose of the utility model is to propose a kind of portable device.
In order to achieve the above objectives, the first aspect of the utility model proposes a kind of internal resistance of cell detection device, including：Electricity
Cell voltage Acquisition Circuit, the battery voltage acquisition circuit are connected with battery, to acquire the voltage at battery both ends in real time；Controllably
Switch and the load of pond internal resistance detection, wherein the internal resistance of cell detection load is connected to battery by the controllable switch；Control
Device, the controller are connected with the control terminal of the battery voltage acquisition circuit and the controllable switch respectively, the controller
It is opened or closed to control the controllable switch, wherein when the controllable switch disconnects, the battery voltage acquisition circuit
The first cell voltage is got, in controllable switch closure, the battery voltage acquisition circuit gets the second battery electricity
Pressure, the controller are obtained according to internal resistance of cell detection load, first cell voltage and second cell voltage
The internal resistance of the battery.
Internal resistance of cell detection device according to the present utility model, controller control controllable switch are opened or closed, and can
The first cell voltage is obtained by battery voltage acquisition circuit when control switch disconnects, and passes through battery in controllable switch closure
Voltage collection circuit obtains the second cell voltage, and according to internal resistance of cell detection load, the first cell voltage and the second battery electricity
Pressure obtains the internal resistance of battery.The device can simply and effectively detect the internal resistance of battery as a result, to effectively prevent because of electricity
Battery capacity shows mistake caused by pond internal resistance measurement inaccuracy, or even the problem of cannot be started up, substantially increases user's body
It tests.
In addition, can also have following additional technology according to the utility model internal resistance of cell detection device set forth above
Feature：
In some instances, the internal resistance of cell detection load is resistance R or constant-current source I.
In some instances, the battery is also connected with apparatus of load, to power to the apparatus of load, wherein described
Controller is also according to internal resistance of cell detection load, the power of the apparatus of load, first cell voltage and described the
Two cell voltages obtain the internal resistance of the battery.
In some instances, the internal resistance of cell detection device further includes：First analog-digital converter, first modulus
Converter is connected with the battery voltage acquisition circuit and the controller respectively, to adopt to the battery voltage acquisition circuit
The cell voltage collected carries out analog-to-digital conversion.
In some instances, the internal resistance of cell detection device further includes：Backup power source；Backup power source voltage acquisition electricity
Road, the backup power source voltage Acquisition Circuit is connected with the backup power source, to acquire the voltage of the backup power source in real time；
Power supply switch circuit, the first end of the power supply switch circuit are connected with the battery, the second end of the power supply switch circuit
It is connected with the backup power source, the third end of the power supply switch circuit is connected with the apparatus of load, the power supply switching electricity
The control terminal on road is connected with the controller, wherein the controller is also connected with the backup power source voltage Acquisition Circuit, uses
To be controlled according to the voltage of the backup power source the power supply switch circuit.
In some instances, the internal resistance of cell detection device further includes：Second analog-digital converter, second modulus
Converter is connected with the backup power source voltage Acquisition Circuit and the controller respectively, to adopt to the backup power source voltage
The voltage of the collected backup power source of collector carries out analog-to-digital conversion.
In some instances, the internal resistance of cell detection device further includes：Detection circuit, the detection circuit respectively with
The controller is connected with the apparatus of load, detects to the stability to the apparatus of load, to set described in judgement
Whether standby load is fluctuated, wherein when the apparatus of load fluctuates, the controller is according to the backup power source
Voltage controls the power supply switch circuit.
In some instances, the power supply switch circuit includes single-pole double-throw switch (SPDT), wherein the single-pole double-throw switch (SPDT)
First movement end is connected with the battery, and the second mobile terminal of the single-pole double-throw switch (SPDT) is connected with the backup power source, described
The fixing end of single-pole double-throw switch (SPDT) is connected with the apparatus of load, the control terminal of the single-pole double-throw switch (SPDT) and the controller phase
Even.
In some instances, the power supply switch circuit includes：First switch, one end of the first switch and the electricity
Pond is connected, and the other end of the first switch is connected with the apparatus of load, the control terminal of the first switch and the control
Device is connected；Second switch, one end of the second switch are connected with the backup power source, the other end of the second switch and institute
It states apparatus of load to be connected, the control terminal of the second switch is connected with the controller；Wherein, when the first switch is closed,
The second switch disconnects, when the first switch disconnects, the second switch closure.
In order to achieve the above objectives, the utility model second aspect proposes a kind of portable device comprising above-mentioned electricity
Pond internal resistance detection device.
The portable device of the utility model can be detected simply and effectively by above-mentioned internal resistance of cell detection device
The internal resistance of battery out, so that effectively preventing battery capacity caused by measuring inaccuracy because of the internal resistance of cell shows mistake, even
The problem of cannot be started up substantially increases user experience.
The advantages of the utility model additional aspect, will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
Fig. 1 is the block diagram according to the internal resistance of cell detection device of the utility model embodiment；
Fig. 2 is the block diagram according to the internal resistance of cell detection device of the utility model one embodiment；
Fig. 3 is the schematic diagram according to the internal resistance of cell detection device of first specific example of the utility model；
Fig. 4 is the block diagram according to the internal resistance of cell detection device of the utility model another embodiment；
Fig. 5 is the schematic diagram according to the internal resistance of cell detection device of second specific example of the utility model；
Fig. 6 is the schematic diagram according to the internal resistance of cell detection device of the utility model third specific example.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
With reference to the accompanying drawings come describe the utility model proposes internal resistance of cell detection device, with the portable of the device
Equipment and internal resistance of cell detection method.
Fig. 1 is the block diagram according to the internal resistance of cell detection device of the utility model embodiment.
As shown in Figure 1, the internal resistance of cell detection device of the utility model embodiment may include：Battery voltage acquisition circuit
10, controllable switch 20, internal resistance of cell detection load 30 and controller 40.
Wherein, battery voltage acquisition circuit 10 is connected with battery 100, to acquire the voltage at 100 both ends of battery in real time.Electricity
Pond internal resistance detection load 30 is connected to battery 100 by controllable switch 20.Controller 40 respectively with battery voltage acquisition circuit 10
It is connected with the control terminal of controllable switch 20, controller 40 is opened or closed to control controllable switch 20.In this embodiment, exist
When controllable switch 20 disconnects, battery voltage acquisition circuit 10 obtains the first cell voltage, when controllable switch 20 is closed, battery electricity
Press Acquisition Circuit 10 obtain the second cell voltage, controller 40 can according to the internal resistance of cell detect load the 30, first cell voltage and
The internal resistance of second cell voltage acquisition battery 100.
Specifically, controllable switch 20 is connected with 100 input terminal of battery, and controls its open and close by controller 40,
In closed condition, 100 input terminal of battery is connected controllable switch 20 with internal resistance of cell detection load 30, to examine to the internal resistance of cell
30 power supply of load is surveyed, controller 40 can acquire the voltage at 100 both ends of battery by battery voltage acquisition circuit 10 at this time, be denoted as the
Two cell voltages.Controllable switch 20 is under disconnection, and 100 input terminal of battery and internal resistance of cell detection load 30 disconnect, at this time
Controller 40 can acquire the voltage at 100 both ends of battery by battery voltage acquisition circuit 10, be denoted as the first cell voltage.Work as battery
When internal resistance detection load 30 is connected with 100 input terminal of battery, the voltage of 100 input terminal of battery can detect load 30 because of the internal resistance of cell
Access and reduce, therefore, controller 40 can according to voltage reduce amplitude (access cell resistance detection load 30 when voltage
Variation) and Given information (resistance value when such as internal resistance of cell detection load is resistance) calculate the internal resistance of battery.
In one embodiment of the utility model, as shown in Fig. 2, battery 100 is also connected with apparatus of load 60, to be set
Standby 60 power supply of load.
In this embodiment, controller 40 is also according to internal resistance of cell detection load 30, the power of apparatus of load 60, the first electricity
Cell voltage and the second cell voltage obtain the internal resistance of battery 100.
In one embodiment of the utility model, as shown in Fig. 2, internal resistance of cell detection device may also include the first modulus
Converter 50, the first analog-digital converter 50 are connected with battery voltage acquisition circuit 10 and controller 40 respectively, to battery is electric
The analog signal that pressure Acquisition Circuit 10 acquires is converted to corresponding digital signal, and is transferred to the processing of controller 40.It is understood that
If controller 40 carries analog-digital converter function, analog-to-digital conversion is carried out without using analog-digital converter 50.
It is discussed in detail the internal resistance for how obtaining battery 100 below.
One embodiment according to the present utility model, internal resistance of cell detection load 30 is resistance R or constant-current source I.
Specifically, when internal resistance of cell detection load 30 is resistance R, controller 40 can calculate electricity according to following formula (1)
The internal resistance in pond 100：
Wherein, P is the power of apparatus of load, and Rs is the internal resistance of battery, and U1 is the first cell voltage, and U2 is the second battery electricity
Pressure.
As a specific example, as shown in figure 3, the access of 100 input terminal of battery is battery 100, for convenience of explanation
It is depicted as the equivalent circuit of battery, due to battery and a kind of power supply, thus its equivalent circuit is believed that by voltage Us and resistance
Rs, wherein Rs is the internal resistance of battery 100 to be detected.When detection device does not start, battery 100 does not export electric current,
Thus have power input VIN=Us.
The actual circuit of controllable switch 20 is not limited to the switching circuit that any device is built, as long as constituting controllable switch
?.For ease of description, controllable switch is indicated with SW1, its closing or opening is controlled by controller 40.Internal resistance of cell detection is negative
30 load using equivalent resistance for R is carried, the circuit that equivalent resistance is R can be arbitrarily built into practice and be used equally for battery electric
Resistance detection load 30, for example, the resistance that ohmic load, metal-oxide-semiconductor are constituted, the load (such as LCD backlight) that a certain function of equipment is opened
It is resistance R Deng, final equivalent result.In addition, the position of internal resistance of cell detection load 30 and controllable switch 20 does not limit, front and back
Position does not influence actually detected effect.Also, resistance R will guarantee after controllable switch 20 is closed, and VIN has sufficiently large pressure
Drop, avoids generating big internal resistance detection error because of too small can not differentiate of pressure drop.
Controller 40 can be any applicable microcontroller, and battery voltage acquisition circuit 10 can be according to actual battery electricity
Pressure and analog-digital converter 60 situation decayed or amplified, low-pass filtering treatment.Analog-digital converter 60 can be outside
Independent analog-digital converter, the analog-digital converter being also possible to inside controller 40.
Specifically, as shown in figure 3, after portable device booting operation, battery 100 is needed to except internal resistance of cell detection is negative
It carries the apparatus of load other than 30 to be powered, portable device first initializes each module of detection device, until portable
Formula equipment stable operation.In order to reduce measurement error, external equipment can be closed to greatest extent, at 40 control circuit of controller
In a kind of power consumption state, and proof load power is stable as far as possible, and high current is avoided to flow through the interior of 100 input terminal of battery
Resistance, causes the internal resistance measurement error of battery 100 big.This stage uses power meter or current voltmeter test equipment load 60
Power, obtain the performance number of apparatus of load 60, if operating status is consistent, power deviation very little between equipment, performance number
It only needs to measure primary.For ease of calculation, the power of apparatus of load 30 is denoted as P, equivalent load resistance is denoted as RL,
In,
Controller 40 is sampled by voltage of the battery voltage acquisition circuit 10 to 100 input terminal of battery, and passes through the
One analog-digital converter 50 carries out low-pass filtering to digital signal and obtains voltage value, is denoted as the first cell voltage U1, whereinController 40 controls SW1 closure, 30 ground connection of cell resistance detection load, controller 40
It is sampled by voltage of the battery voltage acquisition circuit 10 to 100 input terminal of battery, and right by the first analog-digital converter 50
Digital signal carries out low-pass filtering and obtains voltage value, is denoted as the second cell voltage U2, wherein According to RL, U1 and U2 formula, above-mentioned formula (1) can be obtained, i.e., battery is connected with equipment
When load, the internal resistance of battery
In addition, can then ignore the power P of apparatus of load when apparatus of load power is smaller, then the internal resistance of battery
In above-mentioned internal resistance of cell detection device, battery not only needs to power to internal resistance of cell measuring circuit, it is also necessary to give
60 power supply of whole equipment load, if apparatus of load fluctuates, the internal resistance value that may cause measurement is not allowed, therefore can also be
Backup power source is introduced in above-mentioned apparatus.
One embodiment according to the present utility model, as shown in figure 4, internal resistance of cell detection device further includes：Backup power source
70, backup power source voltage Acquisition Circuit 80 and power supply switch circuit 90.Wherein, backup power source voltage Acquisition Circuit 80 and standby electricity
Source 70 is connected, to acquire the voltage of backup power source 70 in real time.The first end of power supply switch circuit 90 is connected with battery 100, electricity
The second end of source switching circuit 90 is connected with backup power source 70, and the third end of power supply switch circuit 90 is connected with apparatus of load 60,
The control terminal of power supply switch circuit 90 is connected with controller 40, and controller 40 is connected with backup power source voltage Acquisition Circuit 80.
In this embodiment, controller 40 is also connected with backup power source voltage Acquisition Circuit 80, to according to backup power source
Voltage power supply switch circuit is controlled.Specifically, controller 40 judges whether the voltage of backup power source 70 is more than or equal to
Predeterminated voltage, and the voltage of backup power source 70 be more than or equal to predeterminated voltage when, control power supply switch circuit 90 switch over
Backup power source 70 is set to power to apparatus of load 60.Wherein, predeterminated voltage can be demarcated according to the actual situation.
Further, in this embodiment, internal resistance of cell detection device further includes detection circuit (being not shown in Fig. 4), inspection
Slowdown monitoring circuit is connected with controller 40 and apparatus of load 60 respectively, detects to the stability to apparatus of load 60, with judgement
Whether apparatus of load 60 fluctuates.When the apparatus of load fluctuates, the controller is according to the backup power source
Voltage controls when apparatus of load 60 fluctuates the power supply switch circuit,
Specifically, controllable switch 20 is connected with 100 input terminal of battery, and its closure is controlled by controller 40 and is broken
It opens, in closed condition, 100 input terminal of battery is connected controllable switch 20 with internal resistance of cell detection load 30；Controllable switch 20
Under disconnection, 100 input terminal of battery and internal resistance of cell detection load 30 are disconnected.Internal resistance of cell detection load 30 and battery
When 100 input terminals are connected, the voltage of 100 input terminal of battery can be reduced because the internal resistance of cell detects the access of load 30, thus
Controller 40 can be according to the amplitude (voltage change when access cell resistance detection load 30) that voltage reduces and Given information is (such as
Resistance value when internal resistance of cell detection load is resistance) calculate the internal resistance of battery.
Backup power source 70 provides power supply to device, and what power supply switch circuit 90 was used to be switched to the power supply of apparatus of load 60 is electricity
Pond 100 or backup power source 70.For example, controller 40 passes through spare when detection circuit detects that apparatus of load 60 fluctuates
Supply voltage Acquisition Circuit 80 acquires the voltage of backup power source 70, and it is default to judge whether the voltage of backup power source 70 is more than or equal to
Voltage, if it is larger than or equal to controller 40 then controls power supply switch circuit 90 and switches over, so that backup power source 70 is negative to equipment
Carry 60 power supplies；If it is less, illustrating that the voltage of backup power source 70 is unable to reach the minimum supply voltage of device, device will lead to
Can not normal power supply, thus improper progress internal resistance of cell detection can charge to backup power source 70, until backup power source 70
Voltage be more than or equal to predeterminated voltage, controller 40 controls power supply switch circuit 90 and switches over, so that backup power source 70 is to being set
Standby 60 power supply of load.
Further, in one embodiment of the utility model, internal resistance of cell detection device may also include：Second modulus
Converter, the second analog-digital converter is connected with backup power source voltage Acquisition Circuit 80 and controller 40 respectively, to standby electricity
The voltage of the collected backup power source 70 of source voltage collection circuit 80 carries out analog-to-digital conversion.
In this embodiment, the second analog-digital converter can be integrally disposed with the first analog-digital converter 50, alternatively, can be by first
Analog-digital converter 50 replaces the second analog-digital converter, as shown in figure 4,
Optionally, as shown in figure 5, power supply switch circuit 90 may include first switch SW2 and second switch SW3, wherein the
One end of one switch SW2 is connected with battery 100, and the other end of first switch SW2 is connected with apparatus of load 60, first switch SW2
Control terminal be connected with controller 40；One end of second switch SW3 is connected with backup power source 70, the other end of second switch SW3
It is connected with apparatus of load 60, the control terminal of second switch SW3 is connected with controller 40, and when first switch SW2 closure, second is opened
SW3 is closed to disconnect, when first switch SW2 is disconnected, second switch SW3 closure.
As a specific example, as shown in figure 5, controllable switch 20 and internal resistance of cell detection load the description of 30 parts,
It can refer to embodiment shown in Fig. 3, tediously long to avoid, which is not described herein again, the backup power source 70 of main description access, standby electricity
Source voltage collection circuit 80 and power supply switch circuit 90.
Backup power source 70 can be super capacitor or battery, as long as the voltage for meeting backup power source 70 is more than or equal to device
Input voltage.
Specifically, detection device is first initialized, if controller 40 does not complete initialization, the control of controller 40 can
Switch SW2 closure is controlled, SW3 is disconnected, and controller 40 is powered using battery 100；If controller 40 has been completed to initialize,
Then controller 40 is sampled by voltage of the backup power source voltage Acquisition Circuit 80 to backup power source 70, and to digital signal into
Row low-pass filtering obtains voltage value.If the voltage value is more than or equal to predeterminated voltage, controller 40 ifs, controls SW3 closure, and SW2 is disconnected
It opens, is powered using backup power source 70, battery 100 does not export electric current at this time；If the voltage value is less than predeterminated voltage,
It charges to backup power source 70, until the voltage of backup power source 70 is more than or equal to predeterminated voltage.
Controller 40 is sampled by voltage of the battery voltage acquisition circuit 10 to 100 input terminal of battery, and to number
Signal carries out low-pass filtering and obtains voltage value, is denoted as the first supply voltage U1；Controller 40 controls SW1 closure, at this time in battery
30 ground connection of resistance detection load, controller 40 are sampled by voltage of the battery voltage acquisition circuit 10 to 100 input terminal of battery,
And low-pass filtering is carried out to digital signal and obtains voltage value, it is denoted as the second cell voltage U2.Finally, according in U1, U2 and battery
Resistance detection load R can calculate the internal resistance Rs of battery, for example, calculating the internal resistance Rs for obtaining battery by above-mentioned formula (1).
Internal resistance of cell detection load 30 not only can be ohmic load, can also be current source loads, practical new according to this
Another embodiment of type, when internal resistance of cell detection load 30 is constant-current source I, controller 40 is calculated according to following formula (2)
The internal resistance of battery：
Wherein, Rs is the internal resistance of battery, and U1 is the first cell voltage, and U2 is the second cell voltage.
Specifically, as shown in fig. 6, the distinctive points with embodiment shown in fig. 5 are that internal resistance of cell detection load 30 uses
Constant-current source I is as load.After initialization, controller 40 is by backup power source voltage Acquisition Circuit 80 to standby electricity for detection device
The voltage in source 70 is sampled, and is carried out low-pass filtering to digital signal by analog-digital converter 50 and obtained voltage value, if should
Voltage value is greater than predeterminated voltage, and controller 40 then controls SW3 closure, and SW2 is disconnected, is powered using backup power source 70, battery
100 do not export electric current.Controller 40 is sampled by voltage of the battery voltage acquisition circuit 10 to 100 input terminal of battery,
And low-pass filtering is carried out to digital signal by analog-digital converter 50 and obtains voltage value, it is denoted as the first cell voltage U1；Controller
40 control SW1 closures, 30 ground connection of internal resistance of cell detection load, controller 40 is by battery voltage acquisition circuit 10 to battery 100
The voltage of input terminal is sampled, and is carried out low-pass filtering to digital signal by analog-digital converter 50 and obtained voltage value, is denoted as
Second cell voltage U2.Finally, acquisition electricity can be calculated according to current known I, the first cell voltage U1 and the second cell voltage U2
The internal resistance Rs in pond, for example, calculating the internal resistance for obtaining battery by above-mentioned formula (2).
Optionally, power supply switch circuit 90 may also include single-pole double-throw switch (SPDT), wherein the first movement of single-pole double-throw switch (SPDT)
End is connected with battery 100, and the second mobile terminal of single-pole double-throw switch (SPDT) is connected with backup power source 70, the fixing end of single-pole double-throw switch (SPDT)
It is connected with apparatus of load 60, the control terminal of single-pole double-throw switch (SPDT) is connected with controller 40.Certainly, it is not limited in actual circuit
Controller 40 controls two switches, a single-pole double-throw switch (SPDT)s respectively, as long as can achieve the purpose that power supply switch circuit 90.
Backup power source voltage Acquisition Circuit 80 can be carried out according to actual cell voltage and the situation of the second analog-digital converter decaying or
Person's amplification, low-pass filtering treatment.
To sum up, the internal resistance of cell detection device of the utility model embodiment can simply and effectively detect the interior of battery
The problem of hindering, battery capacity display mistake caused by effectively preventing because of internal resistance of cell inaccuracy, or even cannot be started up, significantly
Improve user experience.
In addition, the embodiments of the present invention also proposed a kind of portable device comprising above-mentioned internal resistance of cell inspection
Survey device.
The portable device of the utility model embodiment can be simple and effective by above-mentioned internal resistance of cell detection device
Detect the internal resistance of battery, so that it is wrong to effectively prevent battery capacity display caused by measuring inaccuracy because of the internal resistance of cell
Accidentally, the problem of or even cannot be started up, substantially increases user experience.
It should be appreciated that each section of the utility model can be realized with hardware, software, firmware or their combination.?
In above embodiment, what multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Software or firmware are realized.It, and in another embodiment, can be with known in this field for example, if realized with hardware
Any one of following technology or their combination realize：With for realizing the logic gate of logic function to data-signal
The discrete logic of circuit, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA),
Field programmable gate array (FPGA) etc..
In addition, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thick in the description of the present invention,
Degree ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " clockwise ",
The orientation or positional relationship of the instructions such as " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure or position
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (10)
1. a kind of internal resistance of cell detection device, which is characterized in that including：
Battery voltage acquisition circuit, the battery voltage acquisition circuit are connected with battery, to acquire the electricity at battery both ends in real time
Pressure；
Controllable switch and internal resistance of cell detection load, wherein the internal resistance of cell detection load is connected by the controllable switch
To the battery；
Controller, the controller are connected with the control terminal of the battery voltage acquisition circuit and the controllable switch respectively, institute
It states controller and is opened or closed to control the controllable switch, wherein when the controllable switch disconnects, the cell voltage
Acquisition Circuit gets the first cell voltage, and in controllable switch closure, the battery voltage acquisition circuit gets the
Two cell voltages, the controller is according to internal resistance of cell detection load, first cell voltage and second battery
Voltage obtains the internal resistance of the battery.
2. internal resistance of cell detection device as described in claim 1, which is characterized in that the internal resistance of cell detection load is resistance
R or constant-current source I.
3. internal resistance of cell detection device as claimed in claim 1 or 2, which is characterized in that it is negative that the battery is also connected with equipment
It carries, to power to the apparatus of load, wherein the controller is negative also according to internal resistance of cell detection load, the equipment
The power of load, first cell voltage and second cell voltage obtain the internal resistance of the battery.
4. internal resistance of cell detection device as described in claim 3, which is characterized in that further include：
First analog-digital converter, first analog-digital converter respectively with the battery voltage acquisition circuit and the controller phase
Even, to carry out analog-to-digital conversion to the collected cell voltage of the battery voltage acquisition circuit.
5. internal resistance of cell detection device as described in claim 3, which is characterized in that further include：
Backup power source；
Backup power source voltage Acquisition Circuit, the backup power source voltage Acquisition Circuit is connected with the backup power source, to real-time
Acquire the voltage of the backup power source；
Power supply switch circuit, the first end of the power supply switch circuit are connected with the battery, and the of the power supply switch circuit
Two ends are connected with the backup power source, and the third end of the power supply switch circuit is connected with the apparatus of load, and the power supply is cut
The control terminal for changing circuit is connected with the controller, wherein the controller also with the backup power source voltage Acquisition Circuit phase
Even, to be controlled according to the voltage of the backup power source the power supply switch circuit.
6. internal resistance of cell detection device as described in claim 5, which is characterized in that further include：
Second analog-digital converter, second analog-digital converter respectively with the backup power source voltage Acquisition Circuit and the control
Device is connected, and carries out analog-to-digital conversion to the voltage to the collected backup power source of the backup power source voltage Acquisition Circuit.
7. internal resistance of cell detection device as described in claim 5, which is characterized in that further include：
Detection circuit, the detection circuit are connected with the controller and the apparatus of load respectively, to negative to the equipment
The stability of load is detected, to judge whether the apparatus of load fluctuates, wherein when the apparatus of load fluctuates
When, the controller controls the power supply switch circuit according to the voltage of the backup power source.
8. internal resistance of cell detection device as described in claim 5, which is characterized in that the power supply switch circuit includes hilted broadsword
Commutator, wherein the first movement end of the single-pole double-throw switch (SPDT) is connected with the battery, and the of the single-pole double-throw switch (SPDT)
Two mobile terminals are connected with the backup power source, and the fixing end of the single-pole double-throw switch (SPDT) is connected with the apparatus of load, the list
The control terminal of double-pole double throw switch is connected with the controller.
9. internal resistance of cell detection device as described in claim 5, which is characterized in that the power supply switch circuit includes：
First switch, one end of the first switch are connected with the battery, the other end of the first switch and the equipment
Load is connected, and the control terminal of the first switch is connected with the controller；
Second switch, one end of the second switch are connected with the backup power source, the other end of the second switch with it is described
Apparatus of load is connected, and the control terminal of the second switch is connected with the controller；
Wherein, when the first switch is closed, the second switch is disconnected, when the first switch disconnects, the second switch
Closure.
10. a kind of portable device, which is characterized in that detected including the internal resistance of cell as claimed in any one of claims 1-9 wherein
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820622893.7U CN208140894U (en) | 2018-04-27 | 2018-04-27 | Internal resistance of cell detection device and portable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820622893.7U CN208140894U (en) | 2018-04-27 | 2018-04-27 | Internal resistance of cell detection device and portable device |
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| CN208140894U true CN208140894U (en) | 2018-11-23 |
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ID=64311491
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221217A (en) * | 2019-05-23 | 2019-09-10 | 武汉光庭科技有限公司 | A kind of detection device and method of charging and discharging lithium battery circuit |
| CN113702853A (en) * | 2021-07-14 | 2021-11-26 | 深圳市有为信息技术发展有限公司 | Vehicle-mounted battery health condition detection device and detection method thereof |
-
2018
- 2018-04-27 CN CN201820622893.7U patent/CN208140894U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221217A (en) * | 2019-05-23 | 2019-09-10 | 武汉光庭科技有限公司 | A kind of detection device and method of charging and discharging lithium battery circuit |
| CN110221217B (en) * | 2019-05-23 | 2021-12-21 | 武汉光庭科技有限公司 | Detection device and method for lithium battery charging and discharging circuit |
| CN113702853A (en) * | 2021-07-14 | 2021-11-26 | 深圳市有为信息技术发展有限公司 | Vehicle-mounted battery health condition detection device and detection method thereof |
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