CN105842538B - The measuring equipment of internal resistance - Google Patents
The measuring equipment of internal resistance Download PDFInfo
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- CN105842538B CN105842538B CN201510023546.3A CN201510023546A CN105842538B CN 105842538 B CN105842538 B CN 105842538B CN 201510023546 A CN201510023546 A CN 201510023546A CN 105842538 B CN105842538 B CN 105842538B
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Abstract
The present invention discloses a kind of measuring equipment of internal resistance, to measure the internal resistance of multiple determinands, it includes ammeter, first link block, multiple second link blocks and switch module, first link block is electrically connected ammeter, multiple determinands are electrically connected in multiple second link blocks, switch module is electrically connected between the first link block and multiple second link blocks, switch module is to optionally switch conducting one of the first link block and multiple second link blocks, so that ammeter measures the internal resistance for corresponding to the determinand of the second link block switched on.
Description
Technical field
The present invention relates to a kind of measuring equipments, and in particular to a kind of for measuring the measurement of the internal resistance value of determinand
Device.
Background technique
With flourishing for electric vehicle, electric tool or various portable electronic products, so that lithium battery etc. is various
Battery and then promotes its market scale as the yield of various electronic products increases.By taking lithium battery as an example, lithium battery concatenates more
It is used at battery pack, pushes example electric vehicle as mentioned or electric tool to improve output voltage and electric current.Therefore, lithium electricity
Pond needs to be classified after production is completed, distinguishes the battery with close charge-discharge characteristic, so that lithium battery is working
When electric energy can be provided in a manner of full blast.And not only lithium battery, other batteries also respectively have its characteristic to need during the test
Carry out measuring determination.
And mostly use mechanical moving to pop one's head in the test of the AC internal Resistance of traditional battery, because it belongs to mechanical position
Move, thus measure battery internal resistance value when, be that probe is moved on mesuring battary via Mechanical course, movement relatively slowly and
Test error is big, and the service life of tester table is relatively low.
Summary of the invention
In view of above problem, the application proposes a kind of measuring equipment of internal resistance, and arranged in pairs or groups spy in a manner of switching
Different wiring to carry out internal resistance measurement to multiple determinands.
According to the measuring equipment of the internal resistance in one embodiment of the application, the measuring equipment of this internal resistance is to be measured to measure M
The internal resistance value of object, and the measuring equipment of this internal resistance includes ammeter, the first link block, M the second link blocks and switch module.
First link block is electrically connected ammeter, and i-th of second link blocks are electrically connected i-th of determinand, and switch module is electrical
It is connected between the first link block and the M the second link blocks.First link block has first to be mutually in parallel together
Shaft cable and the second coaxial cable, each second link block have the third coaxial cable being mutually in parallel and the 4th coaxial electrical
Cable, and the first coaxial cable, the second coaxial cable third coaxial cable and the 4th coaxial cable all have inner conductor and outside
Conductor.Switch module is to optionally switch one of the first link block of conducting and the M the second link blocks.Its
In, when the first link block is connected with i-th of second link blocks, the inner conductor and external conductor of the first coaxial cable with
And second coaxial cable inner conductor and external conductor the third coaxial cable of i-th of second link blocks is electrically connected
Inner conductor and external conductor and the 4th coaxial cable inner conductor and external conductor so that ammeter measure i-th to
Survey the internal resistance value of object.Wherein i is the positive integer less than or equal to M, and M is the positive integer more than or equal to two.
In summary, the application provides a kind of measuring equipment of internal resistance, the measuring equipment of this internal resistance passes through switching molding
Block allows its ammeter to be electrically connected different determinands in different time points switching, to measure the internal resistance of different determinands
Value.In addition, the measuring equipment of the internal resistance of the application more by by the first link block be electrically connected at ammeter and switch module it
Between, and by correspond to determinand number multiple second link blocks be electrically connected in switch module with it is multiple to be measured
Design between object, to reduce the interference when internal resistance value for measuring determinand.
Above is to demonstrate and explain this hair about the explanation of teachings herein and the explanation of the following embodiments and the accompanying drawings
Bright spirit and principle, and claims of the present invention is provided and is further explained.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the measuring equipment of the internal resistance of one embodiment of the application.
Fig. 2A is the side view according to the coaxial cable of one embodiment of the application.
Fig. 2 B is the cross-sectional view according to the coaxial cable of one embodiment of the application.
Fig. 3 is the structural schematic diagram according to the measuring equipment of the internal resistance of another embodiment of the application.
Fig. 4 A is measurement of the measuring equipment of the internal resistance of the embodiment according to disclosed by Fig. 3 when measuring first determinand
Illustrative view.
Fig. 4 B is measurement of the measuring equipment of the internal resistance of the embodiment according to disclosed by Fig. 3 when measuring second determinand
Illustrative view.
Fig. 4 C is measurement of the measuring equipment of the internal resistance of the embodiment according to disclosed by Fig. 3 when measuring the 8th determinand
Illustrative view.
Fig. 5 is the structural schematic diagram according to the application more measuring equipment of the internal resistance of an embodiment.
Symbol description:
1 ammeter
2 first link blocks
3_1~3_M, the second link block of 3_1~3_8
4 switch modules
40_1~40_M, 40_1~40_8 switching group
5,5a, 5b, 5c, 5d test board
The first coaxial cable of C1
The second coaxial cable of C2
C3 third coaxial cable
The 4th coaxial cable of C4
First contact of the first terminal of D+ ammeter, determinand
Second contact of the Second terminal of D- ammeter, determinand
DUT_1~DUT_M, DUT_1~DUT_32 determinand
The third contact of the third terminal of S+ ammeter, determinand
4th contact of the forth terminal of S- ammeter, determinand
SW1 first switch
SW2 second switch
SW3 third switch
SW4 the 4th is switched
90 inner conductors
92 internal insulators
94 external conductors
96 outer insulators
Specific embodiment
Describe detailed features and advantage of the invention in detail in embodiments below, content is enough to make any to be familiar with
Relevant art understands technology contents of the invention and implements accordingly, and according to content disclosed by this specification, claim
Book and schema, it is any to be familiar with relevant art and be readily understood upon the relevant purpose of the present invention and advantage.Embodiment below into
The one step viewpoint that the present invention will be described in detail, but it is non-anyways to limit scope of the invention.
It is noted that institute's accompanying drawings of the present invention are simplified schematic diagram, the base that only the invention is illustrated in a schematic way
This structure.Therefore, the specification when actual implementation of component shown in structural schematic diagram is a kind of selective design,
And its assembly layout form is likely more complexity, first give chat it is bright.
Fig. 1 is please referred to, Fig. 1 is the structural schematic diagram according to the measuring equipment of the internal resistance of one embodiment of the application.Such as Fig. 1 institute
Show, the measuring equipment of the internal resistance of the present embodiment to measure M determinand (device under test, DUT) DUT_1~
DUT_M, the measuring equipment of this internal resistance include ammeter 1, the first link block 2, M second link block 3_1~3_M and switching molding
Block 4, it is the positive integer more than or equal to two that wherein switch module 4, which has M switching group 40_1~40_M, M,.First link block 2
It is electrically connected ammeter 1, the M determinand DUT_1 is electrically connected in one end of the M second link block 3_1~3_M
~DUT_M, and the other end of the M second link block 3_1~3_M be electrically connected the M switching group 40_1~
40_M, that is, i-th of determinand DUT_i of one end electric connection of i-th of second link block 3_i, and i-th second connection moulds
The other end of block 3_i is electrically connected i-th of switching group 40_i, and switch module 4 be electrically connected at the first link block 2 with it is described
Between M second link block 3_1~3_M, wherein i is the positive integer less than or equal to M.In in practice, determinand DUT is one kind
Battery or other electronic building bricks with low AC internal Resistance testing requirement, such as supercapacitor (super capacitor).
First link block 2 has the first coaxial cable C1 and the second coaxial cable C2 that are mutually in parallel, and each the
Two link block 3_1~3_M all have the third coaxial cable C3 and the 4th coaxial cable C4 being mutually in parallel.In order to more clearly
The thin portion structure for illustrating the first coaxial cable C1, the second coaxial cable C2, third coaxial cable C3 and the 4th coaxial cable C4, is asked
It is the side view according to the coaxial cable of one embodiment of the application referring to Fig. 2A and Fig. 2 B, Fig. 2A；Fig. 2 B is according to the application one
The cross-sectional view of the coaxial cable of embodiment.As shown in Fig. 2A and Fig. 2 B, the first coaxial cable C1, the second coaxial cable C2, third
Coaxial cable C3 and the 4th coaxial cable C4 all have inner conductor 90, internal insulator 92, external conductor 94 and exterior insulation
Body 96, wherein internal insulator 92 surrounds inner conductor 90, and external conductor 94 surrounds internal insulator 92, and outer insulator 96 is enclosed
Around external conductor 94.
In in practice, inner conductor 90 is a kind of conductive copper wire, and internal insulator 92 is a kind of plastic insulation, and outside is led
Body 94 is a kind of reticulated conductive layer, and outer insulator 96 is a kind of wire outer skin, and this external conductor 94 can be coated on inside absolutely
On the lateral wall of edge body 92.It must first one be mentioned that, since inner conductor 90 is located at the first coaxial cable C1, the second coaxial cable
C2, third coaxial cable C3 and the central axis of the 4th coaxial cable C4 are online, therefore the first coaxial cable C1 of Fig. 1, second are coaxially
The online wiring of the central axis of cable C2, third coaxial cable C3 and the 4th coaxial cable C4 is the inner conductor of Fig. 2A and Fig. 2 B
90, and Fig. 1 close to the first coaxial cable C1, the second coaxial cable C2, third coaxial cable C3 and the 4th coaxial cable C4
Wiring on side wall is the external conductor 94 of Fig. 2A and Fig. 2 B.
Please continue to refer to Fig. 1, the inner conductor of the first coaxial cable C1 and external conductor are interior with the second coaxial cable C2's
The first terminal D+, Second terminal D-, third terminal S+ and of ammeter 1 is electrically connected in one end of portion's conductor and external conductor
Four terminal S-, and the inner conductor and outside of the inner conductor of the first coaxial cable C1 and external conductor and the second coaxial cable C2
The first switch SW1 of the M switching group 40_1~40_M, second switch SW2, is then electrically connected in the other end of conductor
Three switch SW3 and the 4th switch SW4, wherein the first switch SW1 of the M switching group 40_1~40_M, second switch SW2,
Third switch SW3 will be illustrated with the 4th switch SW4 later.The third coaxial cable C3 of i-th of second link block 3_i
One end of inner conductor and the inner conductor and external conductor of external conductor and the 4th coaxial cable C4 be electrically connected
First switch SW1, second switch SW2, third switch SW3 and the 4th switch SW4 of i-th of switching group 40_i, and i-th second
The inner conductor of the inner conductor of the third coaxial cable C3 of link block 3_i and external conductor and the 4th coaxial cable C4 with
The first contact D+, the second contact D-, third of corresponding determinand DUT_i is then electrically connected in the other end of external conductor
Contact S+ and the 4th contact S-.
In in practice, the first contact D+ and third contact S+ of each determinand DUT is to be located at this determinand DUT just
Pole+, and the second contact D- of this determinand DUT and the 4th contact S- are then the cathode-positioned at this determinand DUT.In addition, this reality
Apply example herein the first contact D+ without restriction and third contact S+ be located at the anode of determinand DUT+physical location, Yi Ji
Two point D- and the 4th contact S- is located at the physical location of the cathode-of determinand DUT.In fact, the of the second link block 3_i
What triaxial cable C3 can be electrically connected indirectly corresponding determinand DUT_i by various conductive conductors first connects
Point D+ and the second contact D-；And the 4th coaxial cable C4 of the second link block 3_i can by various conductive conductors and
Ground connection is electrically connected third contact S+, the 4th contact S- of corresponding determinand DUT_i.Whereby, the second link block 3_i
The anode+and cathode-of determinand DUT_i can be electrically connected in third coaxial cable C3 and the 4th coaxial cable C4 in turn.
In an embodiment, one end of the inner conductor and external conductor of third coaxial cable C3 and the 4th coaxial cable C4
Multiple probes (probe) is electrically connected.The inner conductor of third coaxial cable C3 is indirectly electric via a wherein probe
Property the first contact D+ of connection, and its external conductor is electrically connected the second contact D- via wherein another probe indirectly；4th
The inner conductor of coaxial cable C4 is electrically connected third contact S+ via a wherein probe indirectly, and its external conductor via
Wherein another probe and be electrically connected the 4th contact S- indirectly.In addition, the embodiment of the present invention can also pass through multiple crocodile clips
(crocodile clip) or the conductor of other conductions replace probe.
Switch module 4 to optionally switch the first link block 2 of conducting and the M the second link block 3_1~
One of 3_M.For more specifically, when the first link block 2 and i-th of second link block 3_i are via switch unit 4
And when being connected, the inner conductor and outside of the inner conductor and external conductor and the second coaxial cable C2 of the first coaxial cable C1
Conductor be electrically connected the third coaxial cable C3 of i-th of second link block 3_i inner conductor and external conductor and
The inner conductor and the external conductor of 4th coaxial cable C4, so that ammeter measures the internal resistance value of i-th of determinand DUT_i.
For further, each switching group 40_1~40_M in switch module 4 further includes first switch SW1,
Two switch SW2, third switch SW3 and the 4th switch SW4.The first switch SW1 of i-th of switching group 40_i is electrically connected at first
Between the inner conductor of the third coaxial cable C3 of the inner conductor of coaxial cable C1 and i-th of second link block 3_i.I-th
The external conductor that the second switch SW2 of a switching group 40_i is electrically connected at the first coaxial cable C1 connect mould with i-th second
Between the external conductor of the third coaxial cable C3 of block 3_i.The third switch SW3 of i-th of switching group 40_i is electrically connected at
Between the inner conductor of the 4th coaxial cable C4 of the inner conductor of two coaxial cable C2 and i-th of second link block 3_i.The
The external conductor that the 4th switch SW4 of i switching group 40_i is electrically connected at the second coaxial cable C2 connect mould with i-th second
Between the external conductor of the 4th coaxial cable C4 of block 3_i.
In actual operation, when ammeter 1 is intended to measure the internal resistance value of i-th of determinand DUT_i, i-th of switching group 40_
First switch SW1, second switch SW2, third switch SW3 and the 4th switch SW4 of i can be simultaneously turned on, and rest switch group
First switch SW1, second switch SW2, third switch SW3 and the 4th switch SW4 can be simultaneously switched off.At this point, the first coaxial cable
The inner conductor and external conductor of C1 and the inner conductor and external conductor of the second coaxial cable C2 are switched via i-th respectively
The group first switch SW1 of 40_i, second switch SW2, third switch SW3 and the 4th switch SW4 and that third is electrically connected is same
The inner conductor and external conductor of shaft cable C3 and the inner conductor and external conductor of the 4th coaxial cable C4.In in practice,
The above-mentioned switch SW4 of first switch SW1~the 4th is, 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. there is the switching of low internal resistance to switch.
Continue the narration that previous ammeter 1 measures the internal resistance of determinand DUT_i, in ammeter 1 via i-th switching group 3_i's
It is connected after being electrically connected to i-th of determinand DUT_i, ammeter 1 can be to its first terminal D+ to i-th determinand DUT_i's
The second contact D- to its Second terminal D- of first contact D+ and i-th of determinand DUT_i are formed by circuit and provide detection
Electric current, and measure by the third contact S+ and i-th determinand DUT_i of its third terminal S+ to i-th determinand DUT_i
4th contact S- is formed by the cross-pressure in circuit to its forth terminal S-, calculates the internal resistance of i-th of determinand DUT_i accordingly
Value.Therefore, the ammeter 1 of the present embodiment is suitable for the measurement of four endpoints (four-terminal measurement, also known as four-wire type
Measure) LCR table (LCRmeter, also known as impedance analyzer), ohmmeter (ohmmeter, also known as ohmmeter) etc. has in exchange
Hinder the ammeter measured.
In in practice, the first coaxial cable C1 and the second coaxial cable C2, length of the first link block 2 are all substantial
It is equal, and the third coaxial cable C3 of each second link block 3_1~3_M and the length of the 4th coaxial cable C4 are all substantive
It is upper equal.In addition, in actual operation, it more can be set that there are two coaxial electricals between two adjacent switching group 40_i and 40_i+1
Cable (is not illustrated in schema).In more detail, the inner conductor of one of coaxial cable can be electrically connected at switching group 40_i
First switch SW1 and switching group 40_i+1 first switch SW1 between, and its external conductor can be electrically connected at switching group
Between the second switch SW2 of the second switch SW2 and switching group 40_i+1 of 40_i.On the other hand, another coaxial cable is interior
Portion's conductor can be electrically connected between the third switch SW3 of the third switch SW3 and switching group 40_i+1 of switching group 40_i, and its
External conductor can be electrically connected between the 4th switch SW4 of the 4th switch SW4 and switching group 40_i+1 of switching group 40_i.
In fields tool usually intellectual it is appreciated that being set between two adjacent switching group 40_i and 40_i+1
Setting two coaxial cables is a kind of selectivity design, for example, if the distance between two adjacent switching group 40_i and 40_i+1
When greater than a pre-determined distance, then two coaxial cables can be set between two adjacent switching group 40_i and 40_i+1, so that ammeter 1
The internal resistance value of each determinand DUT_1~DUT_M measured will not because of the too long influence of the route between each switching group and
Error.On the other hand, it if the distance between two adjacent switching group 40_i and 40_i+1 are less than a pre-determined distance, is not required to
Two coaxial cables (i.e. shown in Fig. 1) are set between two adjacent switching group 40_i and 40_i+1.
In in practice, the first link block 2 of Fig. 1, the M second link block 3_1~3_M and switch module 4 can
To form a test board 5, in more detail, the first link block 2 of Fig. 1, the M second link block 3_1~3_M with
Switch module 4 is set on test board 5, and the M second link block 3_1~3_M be for electrically connecting to the M to
The one end for surveying object DUT_1~DUT_M can be respectively welded on multiple metal gaskets on test board 5, the position of these metal gaskets
Setting can connect corresponding to the first contact D+, the second contact D-, the third contact S+ of the M determinand DUT_1~DUT_M with the 4th
The position of point S-.
Practical actuation of the measuring equipment of internal resistance in order to illustrate the embodiments of the present invention more clearly when measuring determinand,
Algebra M is set as eight below, referring to figure 3., Fig. 3 is the structure according to the measuring equipment of the internal resistance of another embodiment of the application
Schematic diagram.As shown in figure 3, the measuring equipment of the internal resistance of the present embodiment is to measure eight determinand DUT_1~DUT_8.It is corresponding
In the quantity of determinand DUT_1~DUT8, the measuring equipment of internal resistance includes eight second link block 3_1~3_8 and eight
Switching group 40_1~40_8.It has been observed that one end of second link block 3_1~3_8 be electrically connected determinand DUT_1~
DUT_8, and corresponding switching group 40_1~40_8 is electrically connected in the other end of second link block 3_1~3_8.Work as electricity
When table 1 is intended to measure i-th of determinand DUT_i, the switch SW4 of first switch SW1~the 4th in i-th of switching group 40_i can be led
It is logical, and make first terminal D+~forth terminal S- of ammeter 1 via the first link block 2, switching group 40_i, i-th second it is same
Shaft cable group 3_i and the first contact S- of contact D+~the 4th that i-th of determinand DUT_i is electrically connected, wherein in this reality
Applying i in example is the positive integer less than or equal to eight.With input as the aforementioned detection electric current to measure third contact S+ and the 4th contact
Cross-pressure between S-, and the internal resistance value of determinand DUT_i is judged accordingly.
More specifically with an embodiment for, A~Fig. 4 C referring to figure 4., Fig. 4 A~Fig. 4 C are the reality according to disclosed by Fig. 3
Measurement actuation of the measuring equipment of the internal resistance of example when sequentially measuring first~the 8th determinand DUT_1~DUT_8 is applied to show
It is intended to.In this embodiment, the measuring equipment of internal resistance the 1st switching group 40_1 is first connected and disconnect other switching group 40_2~
40_8, and by the input of ammeter 1 detection electric current in the first contact D of first terminal D+, the 1st determinand DUT_1 by ammeter 1
+, inside the 1st determinand DUT_1, the Second terminal D- of the second contact D- and ammeter 1 of the 1st determinand DUT_1 formed
Circuit.Then ammeter 1 can be measured by the third terminal S+ of ammeter 1, the third contact S+ of the 1st determinand DUT_1, the 1st
Inside determinand DUT_1, the forth terminal S- of the 4th contact S- of the 1st determinand DUT_1 and ammeter 1 is formed by circuit
Cross-pressure, then judge the internal resistance value of determinand DUT_1 accordingly.
Then as shown in Figure 4 B, the measuring equipment of internal resistance can be connected the 2nd switching group 40_2 and disconnect other switching groups
40_1,40_3~40_8, and measure as described above the 2nd determinand DUT_2 internal resistance value.Then and so on, sequentially lead
Lead to the 3rd~7 switching group 40_3~40_7, and sequentially measures the internal resistance value of the 3rd~7 determinand DUT_3~DUT_7.Finally
As shown in Figure 4 C, the 8th switching group 40_8 is connected and disconnects other switching group 40_1~40_7, and measure the 8th to be measured
The internal resistance value of object DUT_8.Technical field has usual skill when it can be appreciated that during measuring multiple determinands, and
It is not limited only to sequentially measure to obtain each determinand DUT_1~DUT_ as such embodiment with the sequence of determinand DUT_1~DUT_8
8, it can also be measured according to the sequence of determinand DUT_8~DUT_1, even it is measured with random number decision sequence.This can
It is arbitrarily devised depending on the demand in implementation, it is herein and without restriction.
In in practice, the measuring equipment of the internal resistance of previous embodiment when measuring M*n determinand, wherein n be greater than etc.
The pipeline design can be used in positive integer in two, so that the process of measurement is effectively.In one embodiment, when M is eight and n is
When four, that is, when a total of 32 determinand DUT_1~DUT_32, the measuring equipment of internal resistance be electrically connected at the beginning to
Survey object DUT_1~DUT_8, and as earlier mentioned by be turned on or off switching group and sequentially input detection electric current to measure determinand
The internal resistance of DUT_1~DUT_8.Then, for the measuring equipment of internal resistance by assembly line, it is another for replacing determinand DUT_1~DUT_8
Determinand DUT_9~DUT_16 is criticized, and the internal resistance for carrying out determinand DUT_9~DUT_16 of next round measures, until being needed
Until the internal resistance value measurement of survey object DUT_1~DUT_32 finishes.In another embodiment, when M is eight and n is four, Yi Jizong
When sharing 32 determinand DUT_1~DUT_32, when the measuring equipment of internal resistance measures to obtain determinand DUT_1~DUT_8
After internal resistance value, the measuring equipment of internal resistance can with assembly line it is mobile itself position be electrically connected another crowd of determinand DUT_9~
DUT_16 is measured with carrying out the internal resistance of determinand DUT_9~DUT_16 of next round, until all determinand DUT_1~DUT_
Until 32 internal resistance value measurement finishes.
It is the knot according to the application more measuring equipment of the internal resistance of an embodiment please with reference to Fig. 1, Fig. 3 and Fig. 5, Fig. 5
Structure schematic diagram.If Fig. 5 shows, one end of test board 5a~5d can be electrically connected in parallel, and the other end of test board 5a
It is then electrically connected determinand DUT_1~DUT_8, test board 5b~5d is then sequentially electrically connected determinand DUT_9~DUT_32.Often
One test board 5 is all provided with the first link block 2,8 second link block 3_1~3_8 and switch module 4 above-mentioned.
In the embodiment corresponding to Fig. 5, the measuring equipment of internal resistance by the multiple switching group be turned on or off according to
Sequence measures the internal resistance value for the determinand DUT_9~DUT_32 being electrically connected on test board 5a~5d, also that is, the amount of internal resistance
The internal resistance value of determinand DUT_1~DUT_8 can first be measured by surveying device, then measure the internal resistance value of determinand DUT_9~DUT_16, be connect
Sequentially measure the internal resistance value of determinand DUT_17~DUT_24 and the internal resistance value of determinand DUT_25~DUT_32.It is worth noting
, when a certain switching group on a certain test board is connected in the measuring equipment of internal resistance, the measuring equipment of internal resistance is in addition to meeting
It disconnects except remaining switching group on this test board, the measuring equipment of internal resistance but will disconnect all switches on other test boards
Group.
In summary, the embodiment of the present invention provides a kind of measuring equipment of internal resistance, the measuring equipment of this internal resistance passes through
Switch module allows its ammeter to be electrically connected different determinands in different time points switching, to measure different determinands
Internal resistance value.In addition, the measuring equipment of the internal resistance of the embodiment of the present invention more through by the first link block be electrically connected at ammeter with
Between switch module, and multiple second link blocks of number for corresponding to determinand are electrically connected in switch module
With the design between multiple determinands, come reduce measure determinand internal resistance value when interference.Whereby, the embodiment of the present invention is interior
The measuring equipment of resistance can reduce the error in measurement when internal resistance value for measuring determinand, and promote measurement efficiency, and promote internal resistance
Measuring equipment service life, very have practicability.
Although the present invention is disclosed above with the above embodiments, however, it is not to limit the invention.This hair is not being departed from
In bright spirit and scope, carried out by change and retouch, belong to scope of patent protection of the invention.It is defined about the present invention
Protection scope please refers to appended claims.
Claims (9)
1. a kind of measuring equipment of internal resistance, to measure the internal resistance value of M determinand respectively, which is characterized in that the amount of the internal resistance
Surveying device includes:
One ammeter；
One first link block is electrically connected the ammeter, and coaxial with one first coaxial cable being mutually in parallel and one second
Cable；
M the second link blocks, i-th of second link blocks are electrically connected i-th of determinand, and each second link block
With the third coaxial cable and one the 4th coaxial cable being mutually in parallel；And
One switch module is electrically connected between first link block and the M the second link blocks, to selectively
One of switched conductive first link block and the M the second link blocks；
Wherein, first coaxial cable, second coaxial cable, the third coaxial cable and the 4th coaxial cable all have one
Inner conductor and an external conductor, when first link block is connected with i-th of second link blocks, first coaxial cable
The inner conductor be electrically connected i-th of second link blocks the third coaxial cable the inner conductor, this is first coaxial
The external conductor of cable is electrically connected the external conductor of the third coaxial cable of i-th of second link blocks, and this
The inner conductor of two coaxial cables is electrically connected the inner conductor of the 4th coaxial cable of i-th of second link blocks,
It is led outside this of 4th coaxial cable of the external conductor i-th of second link blocks of electric connection of second coaxial cable
Body, so that the ammeter measures the internal resistance value of i-th of determinand, wherein i is the positive integer less than or equal to M, and M is more than or equal to two
Positive integer.
2. the measuring equipment of internal resistance as described in claim 1, which is characterized in that wherein the switch module includes M switching group,
Each switching group further includes a first switch, a second switch, third switch and one the 4th switch, wherein i-th of switch
The first switch of group is electrically connected at the inner conductor of first coaxial cable and the third of i-th of second link blocks
Between the inner conductor of coaxial cable, the second switch of i-th of switching group is electrically connected at being somebody's turn to do for first coaxial cable
Between external conductor and the external conductor of the third coaxial cable of i-th of second link blocks, i-th switching group this
Three switches are electrically connected at the inner conductor of second coaxial cable and the 4th coaxial cable of i-th of second link blocks
The inner conductor between, the 4th switch of i-th switching group is electrically connected at the external conductor of second coaxial cable
Between the external conductor of the 4th coaxial cable of i-th of second link blocks.
3. the measuring equipment of internal resistance as claimed in claim 2, which is characterized in that wherein when the ammeter measures i-th of determinand
Internal resistance value when, the first switch of i-th of switching group, the second switch, third switch are switched with the 4th and are simultaneously turned on,
And the first switch of rest switch group, the second switch, third switch are simultaneously switched off with the 4th switch.
4. the measuring equipment of internal resistance as described in claim 1, which is characterized in that wherein first coaxial cable and this is second same
The length of shaft cable is substantially equal, and the third coaxial cable of each second link block and the 4th coaxial cable
Length is substantially equal.
5. the measuring equipment of internal resistance as described in claim 1, which is characterized in that wherein each determinand has one first to connect
Point, one second contact, a third contact and one the 4th contact, the ammeter have a first terminal, a Second terminal, a third end
Son with a forth terminal, the first terminal, the Second terminal, the third terminal and the forth terminal be electrically connected this first
The inner conductor of coaxial cable, the external conductor of first coaxial cable, second coaxial cable the inner conductor with
The external conductor of second coaxial cable, first contact of i-th of determinand, second contact, the third contact with should
It is coaxial that the inner conductor of the third coaxial cable of i-th of second link blocks, the third is electrically connected in 4th contact
The external conductor of the external conductor of cable, the inner conductor of the 4th coaxial cable and the 4th coaxial cable.
6. the measuring equipment of internal resistance as claimed in claim 5, which is characterized in that wherein first contact of the determinand with should
Third contact is located at the anode of the determinand, and second contact and the 4th contact of the determinand are located at the negative of the determinand
Pole.
7. the measuring equipment of internal resistance as claimed in claim 5, which is characterized in that wherein when first link block and i-th
When second link block is mutually conducted, the ammeter to first contact of the first terminal to i-th determinand and i-th to
Second contact to the Second terminal for surveying object is formed by circuit and provides a detection electric current, and measures by the third terminal to the
The third contact of i determinand and the 4th contact to forth terminal of i-th of determinand are formed by the one of circuit
Cross-pressure calculates the internal resistance value of i-th of determinand accordingly.
8. the measuring equipment of internal resistance as described in claim 1, which is characterized in that wherein first coaxial cable, this is second same
Shaft cable, the third coaxial cable and the 4th coaxial cable are with more an internal insulator and an outer insulator, inside this
Insulator surrounds the inner conductor, which surrounds the internal insulator, which surrounds the external conductor.
9. the measuring equipment of internal resistance as described in claim 1, which is characterized in that wherein first link block, the M the
Two link blocks and the switch module are to be set on a test board, and the test board is more parallel to the electricity with other test boards
Table.
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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| Publication Number | Publication Date |
|---|---|
| CN105842538A CN105842538A (en) | 2016-08-10 |
| CN105842538B true 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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| CN (1) | CN105842538B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1220413B1 (en) * | 1999-09-09 | 2009-03-04 | Toyota Jidosha Kabushiki Kaisha | Apparatus for battery capacity measurement and for remaining capacity calculation |
| JP4577294B2 (en) * | 2006-10-24 | 2010-11-10 | 株式会社デンソー | Battery state detection device |
| TWI364545B (en) * | 2008-04-29 | 2012-05-21 | Chroma Ate Inc | Switched type measurement system for measuring resistance value and voltage resisting value of tested duty |
| CN201788271U (en) * | 2010-09-21 | 2011-04-06 | 天津渤海易安泰电子半导体测试有限公司 | Double-station finished battery testing system |
| CN102879744A (en) * | 2012-09-06 | 2013-01-16 | 深圳睿立方智能科技有限公司 | Storage battery online monitoring system and monitoring method thereof |
| CN103311991B (en) * | 2013-06-21 | 2016-08-24 | 惠州市亿能电子有限公司 | A kind of battery management system and equilibrium state on-line monitoring method thereof |
| CN103823118A (en) * | 2014-02-25 | 2014-05-28 | 中航锂电（洛阳）有限公司 | Device and method for measuring internal resistance of battery cells during equalization |
| CN104849565B (en) * | 2015-05-26 | 2017-12-26 | 深圳市共济科技股份有限公司 | A kind of lead accumulator internal resistance detection circuit |
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| CN105842538A (en) | 2016-08-10 |
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