CN105842538A - Internal resistance measuring device - Google Patents
Internal resistance measuring device Download PDFInfo
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- CN105842538A CN105842538A CN201510023546.3A CN201510023546A CN105842538A CN 105842538 A CN105842538 A CN 105842538A CN 201510023546 A CN201510023546 A CN 201510023546A CN 105842538 A CN105842538 A CN 105842538A
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- switch
- link block
- coaxial cable
- determinand
- internal resistance
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Abstract
The invention discloses an internal resistance measuring device which is used for measuring the internal resistance of multiple objects to be measured. The device comprises an electric meter, a first connection module, multiple second connection modules, and a switching module. The first connection module is electrically connected with the electric meter. The multiple second connection modules are respectively and electrically connected with multiple objects to be measured. The switching module is electrically connected between the first connection module and the multiple second connection modules, and is used for selectively switching on the first connection module and one of the multiple second connection modules to enable the electric meter to measure the internal resistance of the object to be measured corresponding to the switched-on second connection module.
Description
Technical field
The present invention relates to a kind of measuring equipment, and in particular to the measurement of a kind of internal resistance value for measuring determinand
Device.
Background technology
Flourish along with electric motor car, electric tool or various portable electronic product so that lithium battery etc. are various
Battery increases along with the yield of various electronic products and and then promotes its market scale.As a example by lithium battery, lithium battery is many
It is concatenated into set of cells to use, to improve output voltage and electric current to promote example electric motor car as mentioned or electric tool.
Therefore, lithium battery needs classification in addition after production is completed, distinguishes the battery with close charge-discharge characteristic, makes
Obtain lithium battery and electric energy operationally can be provided in the way of full blast.And not only lithium battery, other battery was being tested
Journey is also respectively arranged with its characteristic and need to carry out measuring determination.
And test the mechanical moving probe that uses at the AC internal Resistance of traditional battery more, because it belongs to mechanical displacement,
Therefore when measuring the internal resistance value of battery, be via Mechanical course, probe to be moved on mesuring battary, action is the slowest
And test error is big, the life-span of tester table is relatively low.
Summary of the invention
Because above problem, the application proposes the measuring equipment of a kind of internal resistance, and arrange in pairs or groups in the way of switch switching spy
Different wiring carries out internal resistance measurement to multiple determinands.
According to the measuring equipment of the internal resistance in the application one embodiment, the measuring equipment of this internal resistance is to be measured in order to measure M
The internal resistance value of thing, and the measuring equipment of this internal resistance includes ammeter, the first link block, M the second link block and opens
Close module.First link block is electrically connected with ammeter, and i-th the second link block is electrically connected with i-th determinand, and
Switch module is electrically connected between the first link block and described M the second link block.First link block has
The first coaxial cable being in parallel mutually and the second coaxial cable, each second link block has the 3rd be in parallel mutually
Coaxial cable and the 4th coaxial cable, and the first coaxial cable, the second coaxial cable triaxial cable are coaxial with the 4th
Cable all has inner conductor and external conductor.Switch module is in order to optionally switched conductive the first link block and institute
State M the second link block one of them.Wherein, when the first link block turns on i-th the second link block,
The inner conductor of the first coaxial cable is the most electric with external conductor with the inner conductor of external conductor and the second coaxial cable
Property connect inner conductor and external conductor and the 4th coaxial cable of triaxial cable of i-th the second link block
Inner conductor and external conductor so that ammeter measure i-th determinand internal resistance value.Wherein i is less than or equal to M
Positive integer, M is the positive integer more than or equal to two.
Comprehensive the above, the application provides the measuring equipment of a kind of internal resistance, and the measuring equipment of this internal resistance passes through switching molding
Block makes its ammeter can be electrically connected with different determinands in different time points switching, to measure in different determinand
Resistance.Additionally, the measuring equipment of the internal resistance of the application is more by being electrically connected at ammeter and switch by the first link block
Between module, and multiple second link blocks that would correspond to the number of determinand are electrically connected with in switch module
And the design between multiple determinands, reduces the interference during internal resistance value measuring determinand.
The above explanation about teachings herein and the explanation of following embodiment are to demonstrate and explain the present invention
Spirit and principle, and provide claims of the present invention further to explain.
Accompanying drawing explanation
Fig. 1 is the structural representation of the measuring equipment of the internal resistance according to the application one embodiment.
Fig. 2 A is the side view of the coaxial cable according to the application one embodiment.
Fig. 2 B is the sectional view of the coaxial cable according to the application one embodiment.
Fig. 3 is the structural representation of the measuring equipment of the internal resistance according to another embodiment of the application.
Fig. 4 A is the measuring equipment of the internal resistance according to the embodiment disclosed by Fig. 3 amount in time measuring first determinand
Survey illustrative view.
Fig. 4 B is the measuring equipment of the internal resistance according to the embodiment disclosed by Fig. 3 amount in time measuring second determinand
Survey illustrative view.
Fig. 4 C is the measuring equipment of the internal resistance according to the embodiment disclosed by Fig. 3 amount in time measuring the 8th determinand
Survey illustrative view.
Fig. 5 is the structural representation of the measuring equipment of the internal resistance according to a application more embodiment.
Symbol description:
1 ammeter
2 first link blocks
3_1～3_M, 3_1～3_8 the second link block
4 switch modules
40_1～40_M, 40_1～40_8 switches set
5,5a, 5b, 5c, 5d test board
C1 the first coaxial cable
C2 the second coaxial cable
C3 triaxial cable
C4 the 4th coaxial cable
The first terminal of D+ ammeter, the first contact of determinand
Second terminal of D-ammeter, the second contact of determinand
DUT_1～DUT_M, DUT_1～DUT_32 determinand
3rd terminal of S+ ammeter, the 3rd contact of determinand
4th terminal of S-ammeter, the 4th contact of determinand
SW1 first switchs
SW2 second switch
SW3 the 3rd switchs
SW4 the 4th switchs
90 inner conductors
92 internal insulator
94 external conductors
96 outer insulator
Detailed description of the invention
Hereinafter describing detailed features and the advantage of the present invention the most in detail, its content be enough to make any be familiar with
Relevant art understands the technology contents of the present invention and implements according to this, and according to the content disclosed by this specification, right
Claim and graphic, any relevant art of being familiar with can be readily understood upon purpose and the advantage that the present invention is correlated with.Following
Embodiment further describes the viewpoint of the present invention, but non-to limit scope of the invention anyways.
It is noted that institute of the present invention accompanying drawings is the schematic diagram of simplification, the base of the present invention is described the most in a schematic way
This structure.Therefore, specification during the actual enforcement of shown in structural representation assembly be a kind of optionally
Design, and its assembly layout form is likely more complexity, first give chat bright.
Refer to the structural representation of the measuring equipment that Fig. 1, Fig. 1 are internal resistance according to the application one embodiment.Such as Fig. 1
Shown in, the measuring equipment of the internal resistance of the present embodiment is in order to measure M determinand (device under test, DUT)
DUT_1～DUT_M, the measuring equipment of this internal resistance comprises ammeter the 1, first link block 2, M the second connection mode
Block 3_1～3_M and switch module 4, wherein switch module 4 has M switches set 40_1～40_M, and M is big
In the positive integer equal to two.First link block 2 is electrically connected with ammeter 1, described M the second link block
One end of 3_1～3_M is electrically connected with described M determinand DUT_1～DUT_M, and described M second
The other end of link block 3_1～3_M is electrically connected with described M switches set 40_1～40_M, that is i-th
One end electric connection i-th determinand DUT_i of individual second link block 3_i, and i-th the second link block 3_i
The other end be electrically connected with i-th switches set 40_i, and switch module 4 is electrically connected at the first link block 2 and institute
Stating between M the second link block 3_1～3_M, wherein i is the positive integer less than or equal to M.In practice, treat
Survey thing DUT be a kind of battery or other there is the electronic building brick of low AC internal Resistance testing requirement, such as ultracapacitor
(super capacitor)。
First link block 2 has a first coaxial cable C1 and the second coaxial cable C2 being in parallel mutually, and each
Second link block 3_1～3_M all have the triaxial cable C3 and the 4th coaxial cable C4 being in parallel mutually.For
It is illustrated more clearly that the first coaxial cable C1, the second coaxial cable C2, triaxial cable C3 are coaxial with the 4th
The thin portion structure of cable C4, refer to Fig. 2 A with Fig. 2 B, Fig. 2 A is the coaxial electrical according to the application one embodiment
The side view of cable；Fig. 2 B is the sectional view of the coaxial cable according to the application one embodiment.Such as Fig. 2 A and Fig. 2 B institute
Showing, the first coaxial cable C1, the second coaxial cable C2, triaxial cable C3 and the 4th coaxial cable C4 all have
There are inner conductor 90, internal insulator 92, external conductor 94 and outer insulator 96, wherein internal insulator 92
Around inner conductor 90, external conductor 94 is around internal insulator 92, and outer insulator 96 is around external conductor 94.
In practice, inner conductor 90 is a kind of conductive copper wire, and internal insulator 92 is a kind of plastic insulation, outward
Portion's conductor 94 is a kind of reticulated conductive layer, and outer insulator 96 is a kind of wire outer skin, and this external conductor 94 meeting
It is coated on the lateral wall of internal insulator 92.Must first one be mentioned that, owing to inner conductor 90 is positioned at the first coaxial electrical
Cable C1, the second coaxial cable C2, triaxial cable C3 and the 4th coaxial cable C4 central shaft online, therefore figure
In the first coaxial cable C1 of 1, the second coaxial cable C2, triaxial cable C3 and the 4th coaxial cable C4
The inner conductor 90 that wiring is Fig. 2 A and Fig. 2 B that mandrel is online, and Fig. 1 near the first coaxial cable C1, the
Two coaxial cable C2, triaxial cable C3 and the 4th coaxial cable C4 sidewall on wiring be Fig. 2 A and figure
The external conductor 94 of 2B.
Continue referring to Fig. 1, the inner conductor of the first coaxial cable C1 and external conductor and the second coaxial cable C2's
One end of inner conductor and external conductor be electrically connected with the first terminal D+ of ammeter 1, the second terminal D-, the 3rd
Terminal S+ and the 4th terminal S-, and the inner conductor of the first coaxial cable C1 and external conductor and the second coaxial cable
The inner conductor of C2 and the other end of external conductor are then electrically connected with described M switches set 40_1～40_M's
First switch SW1, second switch SW2, the 3rd switch SW3 and SW4, wherein said M, the 4th switch are opened
Pass group 40_1～the first switch SW1 of 40_M, second switch SW2, the 3rd switch SW3 and the 4th switch SW4
To illustrate after a while.The inner conductor of the triaxial cable C3 of i-th the second link block 3_i is led with outside
The inner conductor of body and the 4th coaxial cable C4 and one end of external conductor are electrically connected with i-th switches set 40_i
The first switch SW1, second switch SW2, the 3rd switch SW3 switch SW4, and i-th second with the 4th
The inner conductor of the triaxial cable C3 of link block 3_i and external conductor and the inside of the 4th coaxial cable C4
The other end of conductor and external conductor be then electrically connected with the first contact D+ of corresponding determinand DUT_i, the
Two point D-, the 3rd contact S+ and the 4th contact S-.
In practice, the first contact D+ of each determinand DUT and the 3rd contact S+ is in this determinand DUT
Positive pole+, the second contact D-of this determinand DUT and the 4th contact S-is then in the negative of this determinand DUT
Pole-.Additionally, the present embodiment is not any limitation as the first contact D+ and the 3rd contact S+ at this is positioned at determinand DUT's
Positive pole+physical location, and the second contact D-and the 4th contact S-be positioned at the negative pole of determinand DUT-actual bit
Put.It is true that the triaxial cable C3 of the second link block 3_i can by various conductive conductors indirectly
The first contact D+ and the second contact D-of the determinand DUT_i corresponding to electric connection；And the second link block 3_i
The 4th coaxial cable C4 can indirectly be electrically connected with corresponding determinand by various conductive conductors
The 3rd contact S+ of DUT_i, the 4th contact S-.Thereby, the triaxial cable C3 of the second link block 3_i with
4th coaxial cable C4 can and then be electrically connected with the positive pole of determinand DUT_i+with negative pole-.
In an embodiment, the inner conductor of triaxial cable C3 and the 4th coaxial cable C4 and the one of external conductor
End is electrically connected with multiple probe (probe).The inner conductor of triaxial cable C3 is via a wherein probe
Indirectly it is electrically connected with the first contact D+, and its external conductor is indirectly electrically connected with via wherein another probe
Two point D-；The inner conductor of the 4th coaxial cable C4 is electrically connected with the 3rd contact indirectly via a wherein probe
S+, and its external conductor is electrically connected with the 4th contact S-indirectly via wherein another probe.Additionally, the present invention is real
Execute example and also can replace probe by the conductor of multiple alligator clamp (crocodile clip) or other conduction.
Switch module 4 is in order to optionally switched conductive the first link block 2 and described M the second link block
One of them of 3_1～3_M.For more specifically, when the first link block 2 and i-th the second link block 3_i
When turning on via switch element 4, the inner conductor of the first coaxial cable C1 and external conductor and the second coaxial electrical
The inner conductor of cable C2 and external conductor are electrically connected with the triaxial cable of i-th the second link block 3_i
The inner conductor of the inner conductor of C3 and external conductor and the 4th coaxial cable C4 and this external conductor, so that ammeter
Measure the internal resistance value of i-th determinand DUT_i.
For further, each switches set 40_1 in switch module 4～40_M further include the first switch SW1,
Second switch SW2, the 3rd switch SW3 and the 4th switch SW4.First switch SW1 of i-th switches set 40_i
It is electrically connected at the inner conductor of the first coaxial cable C1 and the triaxial cable of i-th the second link block 3_i
Between the inner conductor of C3.The second switch SW2 of i-th switches set 40_i is electrically connected at the first coaxial cable
Between the external conductor of the external conductor of C1 and the triaxial cable C3 of i-th the second link block 3_i.I-th
3rd switch SW3 of individual switches set 40_i is electrically connected at inner conductor and the i-th second of the second coaxial cable C2
Between the inner conductor of the 4th coaxial cable C4 of link block 3_i.4th switch SW4 of i-th switches set 40_i
It is electrically connected at the external conductor of the second coaxial cable C2 and the 4th coaxial cable of i-th the second link block 3_i
Between the external conductor of C4.
In actual operation, when the internal resistance value of ammeter 1 i-th to be measured determinand DUT_i, i-th switchs
The first switch SW1 of group 40_i, second switch SW2, the 3rd switch SW3 and the 4th switch SW4 can lead simultaneously
Logical, and the first of rest switch group the switch SW1, second switch SW2, the 3rd switch SW3 and the 4th switch SW4
Can simultaneously switch off.Now, the inner conductor of the first coaxial cable C1 and external conductor and the second coaxial cable C2
Inner conductor and external conductor respectively via the first switch SW1 of i-th switches set 40_i, second switch SW2,
3rd switch SW3 and the 4th switchs SW4 and is electrically connected with the inner conductor of triaxial cable C3 with outside
Conductor and the inner conductor of the 4th coaxial cable C4 and external conductor.In practice, above-mentioned first switch SW1～
4th switch SW4 for example, relay (relay, also known as relaying), metal-oxide half field effect transistor (metal oxide
Semiconductor field effect transistor, MOSFET), bipolar transistor (bipolar junction
Transistor, BJT) etc. have low internal resistance switching switch.
Continue the narration that previous ammeter 1 measures the internal resistance of determinand DUT_i, at ammeter 1 via i-th switches set 3_i
Conducting and after being electrically connected to i-th determinand DUT_i, ammeter 1 can be to be measured to i-th to its first terminal D+
The second contact D-of the first contact D+ and i-th determinand DUT_i of thing DUT_i to its second terminal D-institute
The loop formed provides detection electric current, and measures by the 3rd contact of its 3rd terminal S+ to i-th determinand DUT_i
The cross-pressure in the loop that the 4th contact S-of S+ and i-th determinand DUT_i is formed to its 4th terminal S-, according to
To calculate the internal resistance value of i-th determinand DUT_i.Therefore, the ammeter 1 of the present embodiment is applicable to four end points measurements
(LCRmeter, also known as impedance divide the LCR table of (four-terminal measurement, also known as four-wire type measure)
Analyzer), ohmmeter (ohmmeter, also known as ohmmeter) etc. there is the ammeter that AC internal Resistance measures.
In practice, the first coaxial cable C1 and the second coaxial cable C2 of the first link block 2, length the most real
In matter equal, and each second link block 3_1～the triaxial cable C3 and the 4th coaxial cable C4 of 3_M
Length be all substantially equal.Additionally, in actual operation, between two adjacent switches set 40_i and 40_i+1 more
Two coaxial cables (not being illustrated in graphic) can be provided with.In more detail, the inner conductor of one of them coaxial cable
Can be electrically connected between the first switch SW1 of switches set 40_i and the first switch SW1 of switches set 40_i+1,
And its external conductor can be electrically connected at the second switch SW2 of switches set 40_i and hold with the second of switches set 40_i+1
Close between SW2.On the other hand, the inner conductor of another coaxial cable can be electrically connected at the of switches set 40_i
Between three switch SW3 and the 3rd switch SW3 of switches set 40_i+1, and its external conductor can be electrically connected at and hold
Between the 4th switch SW4 and the 4th switch SW4 of switches set 40_i+1 of pass group 40_i.
In art tool usually intellectual it is appreciated that between two adjacent switches set 40_i and 40_i+1
Two coaxial cables are set for a kind of selectivity design, for example, if two adjacent switches set 40_i and 40_i+1 it
Between distance more than a predeterminable range time, then can arrange between two adjacent switches set 40_i and 40_,i+1 two coaxial
Cable, so that the internal resistance value of each determinand DUT_1～DUT_M that ammeter 1 is measured will not be because of each switches set
Between the long impact of circuit and error.On the other hand, if between two adjacent switches set 40_i and 40_i+1
Distance less than a predeterminable range time, then need not to arrange between two adjacent switches set 40_i and 40_,i+1 two with
Shaft cable (i.e. shown in Fig. 1).
In practice, first link block 2 of Fig. 1, described M the second link block 3_1～3_M and switching molding
Block 4 can form a test board 5, and in more detail, first link block 2 of Fig. 1, described M individual second is even
Connection module 3_1～3_M and switch module 4 are arranged on test board 5, and described M the second link block
One end being for electrically connecting to described M determinand DUT_1～DUT_M of 3_1～3_M can be respectively welded in survey
On multiple metallic gaskets on test plate (panel) 5, the position of these metallic gaskets can correspond to described M determinand
The first contact D+ of DUT_1～DUT_M, the second contact D-, the 3rd contact S+ and the position of the 4th contact S-.
In order to be illustrated more clearly that the actual start in time measuring determinand of the measuring equipment of the internal resistance of the embodiment of the present invention,
Hereinafter algebraically M is set as eight, refer to the measurement dress that Fig. 3, Fig. 3 are the internal resistance according to another embodiment of the application
The structural representation put.As it is shown on figure 3, the measuring equipment of the internal resistance of the present embodiment is in order to measure eight determinands
DUT_1～DUT_8.Corresponding to the quantity of determinand DUT_1～DUT8, the measuring equipment of internal resistance comprises eight
Two link blocks 3_1～3_8 and eight switches set 40_1～40_8.It has been observed that the second link block 3_1～3_8
One end be electrically connected with determinand DUT_1～DUT_8, and the other end of the second link block 3_1～3_8 is respectively
Switches set 40_1 corresponding to electric connection～40_8.As ammeter 1 i-th to be measured determinand DUT_i, i-th
The first switch SW1～the 4th switch SW4 in individual switches set 40_i can turn on, and make the first terminal of ammeter 1
D+～the 4th terminal S-divides via the first link block 2, switches set 40_i, i-th the second coaxial cable group 3_i
Electricity Xing Lianjie the first contact D+～the 4th contact S-of i-th determinand DUT_i, wherein i in the present embodiment
For the positive integer less than or equal to eight.With input detection electric current as the aforementioned to measure the 3rd contact S+ and the 4th contact S-
Between cross-pressure, and judge the internal resistance value of determinand DUT_i according to this.
For more specifically with an embodiment, refer to Fig. 4 A～Fig. 4 C, Fig. 4 A～Fig. 4 C by being taken off according to Fig. 3
The measuring equipment of internal resistance of the embodiment of dew is in time sequentially measuring first～the 8th determinand DUT_1～DUT_8
Measure illustrative view.In this embodiment, the measuring equipment of internal resistance first turns on the 1st switches set 40_1 and disconnection
Other switches set 40_2～40_8, and by ammeter 1 input detection electric current in by the first terminal D+ of ammeter 1,
Inside the first contact D+ of the 1st determinand DUT_1, the 1st determinand DUT_1, the 1st determinand
The loop that the second contact D-of DUT_1 and the second terminal D-of ammeter 1 is formed.Then ammeter 1 can measure by electricity
In 3rd terminal S+ of table 1, the 3rd contact S+ of the 1st determinand DUT_1, the 1st determinand DUT_1
On the loop that portion, the 4th contact S-of the 1st determinand DUT_1 and the 4th terminal S-of ammeter 1 are formed across
Pressure, judges the internal resistance value of determinand DUT_1 the most according to this.
The most as shown in Figure 4 B, the measuring equipment of internal resistance can turn on the 2nd switches set 40_2 and disconnect other switch
Group 40_1,40_3～40_8, and measure to obtain the internal resistance value of the 2nd determinand DUT_2 as described above.Then with this
Analogize, turn in order the 3rd～7 switches set 40_3～40_7, and sequentially measure the 3rd～7 determinand
The internal resistance value of DUT_3～DUT_7.The most as shown in Figure 4 C, turn on the 8th switches set 40_8 and disconnect other
Switches set 40_1～40_7, and measure to obtain the internal resistance value of the 8th determinand DUT_8.Art tool is logical
Often skill is when it can be appreciated that during measuring multiple determinands, be not limited in as such embodiment sequentially with
The order of determinand DUT_1～DUT_8 measures to obtain each determinand DUT_1～DUT_8, it is also possible to according to determinand
The order of DUT_8～DUT_1 measures, even measure with random number decision order.In this visual implementation
Demand is arbitrarily devised, is not any limitation as at this.
In practice, the measuring equipment of the internal resistance of previous embodiment is when measuring M*n determinand, and wherein n is for being more than
Positive integer equal to two can use the pipeline design, so that the process of measurement is effectively.In one embodiment, M is worked as
It is eight and n when being four, that is during a total of 32 determinand DUT_1～DUT_32, the measuring equipment of internal resistance
Determinand DUT_1～DUT_8 it is electrically connected with at the beginning, and as earlier mentioned by being turned on or off switches set sequentially
Input detection electric current is to measure the internal resistance of determinand DUT_1～DUT_8.Then, the measuring equipment of internal resistance is by flowing water
Line, displacement determinand DUT_1～DUT_8 is another crowd of determinand DUT_9～DUT_16, and carries out next round
The internal resistance of determinand DUT_9～DUT_16 measures, until the internal resistance value amount of all determinand DUT_1～DUT_32
Survey complete till.In another embodiment, when M be eight and n be four time, that is a total of 32 determinands
During DUT_1～DUT_32, when the measuring equipment of internal resistance measure determinand DUT_1～DUT_8 internal resistance value after,
The measuring equipment of internal resistance can move the position of itself to be electrically connected with another batch of determinand with streamline
DUT_9～DUT_16, to carry out the internal resistance measurement of determinand DUT_9～DUT_16 of next round, until being needed
Survey thing DUT_1～DUT_32 internal resistance value measure complete till.
Please with reference to Fig. 1, Fig. 3 and Fig. 5, Fig. 5 is the measuring equipment of the internal resistance according to a application more embodiment
Structural representation.As Fig. 5 shows, one end of test board 5a～5d can be electrically connected with in parallel, and test board
The other end of 5a is then electrically connected with determinand DUT_1～DUT_8, test board 5b～5d and is the most sequentially electrically connected with to be measured
Thing DUT_9～DUT_32.Each test board 5 be all provided with aforesaid first link block 2, described 8 second
Link block 3_1～3_8 and switch module 4.
In embodiment corresponding to Fig. 5, the measuring equipment of internal resistance is depended on by the plurality of being turned on or off of switches set
Sequence measures the internal resistance value of described determinand DUT_9～DUT_32 being electrically connected with on test board 5a～5d, that is,
The measuring equipment of internal resistance can first record the internal resistance value of determinand DUT_1～DUT_8, then records determinand
The internal resistance value of DUT_9～DUT_16, the most sequentially records the internal resistance value of determinand DUT_17～DUT_24 and to be measured
The internal resistance value of thing DUT_25～DUT_32.It should be noted that when the measuring equipment of internal resistance turns on a certain test board
A certain switches set when, the measuring equipment of internal resistance in addition to disconnecting remaining switches set on this test board,
The measuring equipment of internal resistance more can disconnect all switches set on other test board.
Comprehensive the above, the embodiment of the present invention provides the measuring equipment of a kind of internal resistance, and the measuring equipment of this internal resistance passes through
Switch module makes its ammeter can be electrically connected with different determinands in different time points switching, different to be measured to measure
The internal resistance value of thing.Additionally, the measuring equipment of the internal resistance of the embodiment of the present invention is more electrically connected with through by the first link block
Between ammeter and switch module, and multiple second link blocks that would correspond to the number of determinand the most electrically connect
It is connected to the design between switch module and multiple determinand, reduces the interference during internal resistance value measuring determinand.Thereby,
The measuring equipment of the internal resistance of the embodiment of the present invention can reduce the error in measurement during internal resistance value measuring determinand, and lifting capacity
Survey efficiency, and the service life of the measuring equipment of lifting internal resistance, extremely there is practicality.
Although the present invention is disclosed above with the above embodiments, so it is not limited to the present invention.Without departing from this
In bright spirit and scope, the change done and retouching, all belong to the scope of patent protection of the present invention.About institute of the present invention
The protection domain defined refer to appending claims.
Claims (9)
1. a measuring equipment for internal resistance, in order to measure the internal resistance value of M determinand respectively, it is characterised in that this internal resistance
Measuring equipment includes:
One ammeter；
One first link block, is electrically connected with this ammeter, and has one first coaxial cable and one second being in parallel mutually
Coaxial cable；
M the second link block, i-th the second link block is electrically connected with i-th determinand, and each this second
Link block has the triaxial cable and one the 4th coaxial cable being in parallel mutually；And
One switch module, is electrically connected between this first link block and described M the second link block, in order to select
This first link block of switched conductive and described M, selecting property ground the second link block one of them；
Wherein, this first coaxial cable, this second coaxial cable, this triaxial cable are with the 4th coaxial cable all
There is an inner conductor and an external conductor, when this first link block turns on i-th the second link block, should
It is the 3rd coaxial that this inner conductor of first coaxial cable and this external conductor are electrically connected with i-th the second link block
This inner conductor of cable and this external conductor, and this inner conductor of this second coaxial cable is electrical with this external conductor
Connect this inner conductor and this external conductor of the 4th coaxial cable of i-th the second link block, so that this ammeter
Measuring the internal resistance value of i-th determinand, wherein i is the positive integer less than or equal to M, and M is the most whole more than or equal to two
Number.
2. the measuring equipment of internal resistance as claimed in claim 1, it is characterised in that wherein this switch module includes M switch
Group, this switches set each further includes one first switch, a second switch, one the 3rd switch and one the 4th switch, wherein
This first switch of i-th switches set is electrically connected at this inner conductor of this first coaxial cable with i-th second even
Between this inner conductor of this triaxial cable of connection module, this second switch of i-th switches set is electrically connected at
This external conductor of this triaxial cable of this external conductor of this first coaxial cable and i-th the second link block
Between, the 3rd switch of i-th switches set is electrically connected at this inner conductor and the i-th of this second coaxial cable
Between this inner conductor of 4th coaxial cable of the second link block, the 4th switch of i-th switches set is electrically
This being connected to this external conductor of this second coaxial cable and the 4th coaxial cable of i-th the second link block is outer
Between portion's conductor.
3. the measuring equipment of internal resistance as claimed in claim 2, it is characterised in that wherein measure i-th determinand when this ammeter
Internal resistance value time, this first switch of i-th switches set, this second switch, the 3rd switch with the 4th switch with
Time conducting, and this first switch of rest switch group, this second switch, the 3rd switch with the 4th switch break simultaneously
Open.
4. the measuring equipment of internal resistance as claimed in claim 1, it is characterised in that wherein this first coaxial cable with this second with
The length of shaft cable is substantially equal, and this triaxial cable of this second link block each and the 4th coaxial electrical
The length of cable is substantially equal.
5. the measuring equipment of internal resistance as claimed in claim 1, it is characterised in that this determinand of each of which has one first and connects
Point, one second contact, one the 3rd contact and one the 4th contact, this ammeter have a first terminal, one second terminal,
One the 3rd terminal and one the 4th terminal, this first terminal, this second terminal, the 3rd terminal are with the 4th terminal respectively
Be electrically connected with this inner conductor of this first coaxial cable, this external conductor of this first coaxial cable, this is second coaxial
This inner conductor of cable and this external conductor of this second coaxial cable, this first contact of i-th determinand, should
It is the 3rd coaxial that second contact, the 3rd contact and the 4th contact are electrically connected with i-th the second link block
This inner conductor of cable, this external conductor of this triaxial cable, the 4th coaxial cable this inner conductor with
This external conductor of 4th coaxial cable.
6. the measuring equipment of internal resistance as claimed in claim 5, it is characterised in that wherein this first contact of this determinand with should
3rd contact is positioned at the positive pole of this determinand, and this second contact of this determinand and the 4th contact are positioned at this determinand
Negative pole.
7. the measuring equipment of internal resistance as claimed in claim 5, it is characterised in that wherein when this first link block and i-th
When second link block is conducted mutually, this ammeter this first contact and to this first terminal to i-th determinand
This second contact of i determinand provides a detection electric current to loop that this second terminal is formed, and measure by this
Three terminals are to the 3rd contact of i-th determinand and the 4th contact of i-th determinand to the 4th terminal institute
One cross-pressure in the loop formed, calculates the internal resistance value of i-th determinand according to this.
8. the measuring equipment of internal resistance as claimed in claim 1, it is characterised in that wherein this first coaxial cable, this second with
Shaft cable, this triaxial cable and the 4th coaxial cable have more an internal insulator and an outer insulator, should
Internal insulator is around this inner conductor, and this external conductor is around this internal insulator, and this outer insulator is outer around this
Portion's conductor.
9. the measuring equipment of internal resistance as claimed in claim 1, it is characterised in that wherein this first link block, described M
Second link block and this switch module are disposed on a test board, and this test board is more in parallel with other this test board
In this ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023546.3A CN105842538B (en) | 2015-01-16 | 2015-01-16 | The measuring equipment of internal resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023546.3A CN105842538B (en) | 2015-01-16 | 2015-01-16 | The measuring equipment of internal resistance |
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| CN105842538A true CN105842538A (en) | 2016-08-10 |
| CN105842538B CN105842538B (en) | 2019-01-11 |
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| CN201510023546.3A Active CN105842538B (en) | 2015-01-16 | 2015-01-16 | The measuring equipment of internal resistance |
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| CN105842538B (en) | 2019-01-11 |
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