[go: up one dir, main page]

CN102236080A - Voltage detection circuit and method thereof - Google Patents

Voltage detection circuit and method thereof Download PDF

Info

Publication number
CN102236080A
CN102236080A CN201010167750XA CN201010167750A CN102236080A CN 102236080 A CN102236080 A CN 102236080A CN 201010167750X A CN201010167750X A CN 201010167750XA CN 201010167750 A CN201010167750 A CN 201010167750A CN 102236080 A CN102236080 A CN 102236080A
Authority
CN
China
Prior art keywords
voltage
detection node
voltage detection
circuit
difference
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201010167750XA
Other languages
Chinese (zh)
Other versions
CN102236080B (en
Inventor
张雅媚
高育彬
刘烘良
蔡丞阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Simplo Technology Co Ltd
Original Assignee
Simplo Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Simplo Technology Co Ltd filed Critical Simplo Technology Co Ltd
Priority to CN201010167750.XA priority Critical patent/CN102236080B/en
Publication of CN102236080A publication Critical patent/CN102236080A/en
Application granted granted Critical
Publication of CN102236080B publication Critical patent/CN102236080B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention discloses a voltage detection circuit which comprises a plurality of even voltage detection nodes, at least one odd voltage detection node, a voltage difference generation circuit, a selection circuit and an operation circuit. The selection circuit is used for controlling the coupling relation between the voltage difference generation circuit and the even-numbered voltage detection nodes and between the voltage difference generation circuit and at least one odd-numbered voltage detection node so as to supply the voltage difference generation circuit to generate the voltage difference between the voltage detection nodes. The operation circuit knows that the voltage of a first coupling voltage detection node is a reference voltage or obtains the voltage of the first coupling voltage detection node according to the reference voltage, and respectively obtains the voltages of the voltage detection nodes according to the voltage difference between the voltage detection nodes and the voltage of the first coupling voltage detection node.

Description

Voltage detecting circuit and method thereof
Technical field
The invention relates to a kind of voltage detecting circuit, especially about a kind of voltage detecting circuit that is used for detecting the respective voltage of a plurality of battery units of battery (battery cell).
Background technology
Rechargeable battery have can recharge therefore quite economic convenience of advantage.Generally speaking, when rechargeable battery is charged, can see through a voltage detecting circuit, the respective voltage of a plurality of battery units (batterycell) in the monitoring battery.During if note abnormalities, charging procedure can be in time stopped,, the life-span of rechargeable battery can be avoided taking place or prolonging by this because of the unusual disaster that causes with the protection rechargeable battery.
Fig. 1 shows the circuit diagram of existing voltage detecting circuit.As shown in Figure 1, a battery 10 comprises a plurality of mutual series connected battery unit (battery cell) 11.Voltage detecting circuit 20 comprises a plurality of subtraction circuits 21.Each subtraction circuit 21 comprises a partial pressure unit 22, a reference voltage generation unit 23 and a subtrator 24, and those subtraction circuits 21 are respectively coupled to a positive electrode and a negative electrode of those battery units 11, in order to detect the voltage of those battery units 11.
Yet, utilize the voltage detecting circuit of prior art, when detecting the voltage of battery unit out of the ordinary in the battery, have error and reach the more problem of required circuit component more greatly.
Summary of the invention
The purpose of one embodiment of the invention is to provide a kind of can reduce the voltage detecting circuit that detects error.The purpose of one embodiment of the invention is to provide a kind of voltage detecting circuit that can reduce manufacturing cost.
According to one embodiment of the invention, provide a kind of voltage detecting circuit its comprise a plurality of even number voltage detecting nodes, at least one odd number voltage detecting node, a voltage difference and produce circuit, and select a circuit and a computing circuit.A plurality of even number voltage detecting nodes comprise one first even number voltage detecting node and one second even number voltage detecting node.At least one odd number voltage detecting node comprises one first odd number voltage detecting node.Select circuit to couple voltage difference and produce circuit, those even number voltage detecting nodes and this at least one odd number voltage detecting node, be used for controlling voltage difference and produce circuit and a plurality of even number voltage detecting node and the internodal relation that couples of at least one odd number voltage detecting, the voltage of using the voltage of counting the voltage detecting node for first coupling and the first odd number voltage detecting node exports voltage difference generation circuit to, make voltage difference produce circuit and produce one first voltage difference according to this, and export voltage difference generation circuit to for the voltage of the first odd number voltage detecting node and the voltage that second coupling is counted the voltage detecting node, make voltage difference produce circuit and produce one second voltage difference according to this.Computing circuit couples voltage difference and produces circuit, receive first voltage difference and second voltage difference, the voltage that known this first coupling of computing circuit is counted the voltage detecting node be a reference voltage or benchmark voltage obtain the voltage that first coupling is counted the voltage detecting node, the voltage of counting the voltage detecting node according to first voltage difference, first coupling obtains the voltage of the first odd number voltage detecting node, and obtains the voltage that second coupling is counted the voltage detecting node according to the voltage of second voltage difference, the first odd number voltage detecting node that obtained.
According to one embodiment of the invention, provide a kind of voltage detection method, in order to detect a plurality of even number voltage detecting nodes and at least one odd number voltage detecting node.Voltage detection method comprises: control a voltage difference and produce circuit and those even number voltage detecting nodes and the internodal relation that couples of at least one odd number voltage detecting, the voltage of using the voltage of counting the voltage detecting node for first coupling and the first odd number voltage detecting node exports voltage difference generation circuit to, make voltage difference produce circuit and produce one first voltage difference according to this, and export voltage difference generation circuit to for the voltage of the first odd number voltage detecting node and the voltage that second coupling is counted the voltage detecting node, make voltage difference produce circuit and produce one second voltage difference according to this; The voltage that known first coupling is counted the voltage detecting node be a reference voltage or benchmark voltage obtain the voltage that first coupling is counted the voltage detecting node; The voltage of counting the voltage detecting node according to first voltage difference, first coupling obtains the voltage of the first odd number voltage detecting node; And obtain the voltage that second coupling is counted the voltage detecting node according to the voltage of second voltage difference, the first odd number voltage detecting node that obtained.
According to one embodiment of the invention voltage detecting circuit, use a voltage difference to produce circuit and cooperate the selection circuit, try to achieve the voltage difference of a plurality of battery units in the different time, so used less subtraction circuit, and can access less error with respect to prior art.
Other purposes of the present invention and advantage can be further understood from the disclosed technical characterictic of the present invention.For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, embodiment cited below particularly also cooperates appended graphicly, is described in detail below.
Description of drawings
Fig. 1 shows the circuit diagram of existing voltage detecting circuit;
Fig. 2 shows the circuit diagram according to the voltage detecting circuit of one embodiment of the invention;
Fig. 3 shows the circuit diagram according to the voltage detecting circuit of one embodiment of the invention;
Fig. 4 shows the circuit diagram according to the voltage detecting circuit of one embodiment of the invention;
Fig. 5 shows the process flow diagram according to the voltage detection method of one embodiment of the invention.
The main element symbol description:
10 batteries
11 battery units
1b first electrode
1a second electrode
20 voltage detecting circuits
21 subtraction circuits
22 partial pressure unit
23 reference voltage generation units
24 subtrators
110 battery units
111 first battery units
112 second battery units
200, the 200a voltage detecting circuit
210, the 210a voltage difference produces circuit
211 first input ends
212 second input ends
213 subtrators
The 213a amplifier
214 bleeder circuits
220 voltage differences produce circuit
221 first selected cells
222 second selected cells
223 select control circuit
230 computing circuits
231 analogies are to digital quantizer (ADC)
C 0～C nThe voltage detecting node
Embodiment
Fig. 2 shows the circuit diagram according to the voltage detecting circuit of one embodiment of the invention.As shown in Figure 2, voltage detecting circuit 200 is coupled to a battery.Power brick contains a plurality of battery units 110, and those battery units 110 are series connection and most tie points of formation mutually.Voltage detecting circuit 200 is suitable for detecting the voltage difference of a plurality of battery units 110, uses the voltage V that tries to achieve those tie points 0～V n Voltage detecting circuit 200 comprises a plurality of voltage detecting node C 0～C n, a voltage difference produces circuit 210, and selects a circuit 220 and a computing circuit 230.Voltage detecting node C 0～C nBe respectively coupled to the tie point of those battery units 110, and can be divided into a plurality of even number voltage detecting node C 0, C 2... and C N-1, and at least one odd number voltage detecting node C 1... and C nA plurality of even number voltage detecting nodes comprise one first even number voltage detecting node C 0With one second even number voltage detecting node C 2At least one odd number voltage detecting node comprises one first odd number voltage detecting node C 1Note that in the present embodiment that n is the odd number positive integer, right present technique field have know usually the knowledgeable comply with exposure of the present invention as can be known n also can be the even number positive integer, when n was the even number positive integer, a plurality of even number voltage detecting nodes were C 0, C 2... and C nAt least one odd number voltage detecting node is C 1... and C N-1Other note that disclosure of the present invention " odd number " and " even number " title system are used for convenient explanation, is used for separating out the voltage node of two distinct groups, is not the definition that is equal to mathematical odd number and coupling number fully.
Select circuit 220 to couple voltage difference and produce circuit 210, even number voltage detecting node C 0, C 2... and C N-1With this at least one odd number voltage detecting node C 1... and C n, be used for controlling voltage difference and produce circuit 210 and even number voltage detecting node C 0, C 2... and C N-1With this at least one odd number voltage detecting node C 1... and C nBetween the relation that couples.For example, select circuit 220 to make first coupling count voltage detecting node C in a time point 0With the first odd number voltage detecting node C 1Be coupled to voltage difference and produce circuit 210, use for first coupling and count voltage detecting node C 0Voltage V 0With the first odd number voltage detecting node C 1Voltage V 1Export voltage difference to and produce circuit 210, make voltage difference produce circuit 210 and produce one first voltage difference according to this, so can record the positive electrode of one first battery unit 111 of those battery units 110 and the voltage difference between negative electrode.Select circuit 220 to make the first odd number voltage detecting node C in another time point 1Count voltage detecting node C with second coupling 2Be coupled to voltage difference and produce circuit 210, use for the first odd number voltage detecting node C 1Voltage V 1Count voltage detecting node C with this second coupling 2Voltage V 2Export voltage difference to and produce circuit 210, make voltage difference produce circuit 210 and produce one second voltage difference according to this, so can record the positive electrode of one second battery unit 112 of those battery units 110 and the voltage difference between negative electrode.
Computing circuit 230 couples voltage difference and produces circuit 210 to receive first voltage difference and second voltage difference.Since in the present embodiment, V 0Equal a default reference voltage, thus computing circuit 230 as can be known first coupling count voltage detecting node C 0Voltage V 0Value, and then count voltage detecting node C according to first voltage difference, first coupling 0Voltage V 0And one default operation rule obtain the first odd number voltage detecting node C 1Voltage V 1In addition again according to second voltage difference, the first odd number voltage detecting node C that obtained 1Voltage V 1And should default operation rule obtain second coupling and count voltage detecting node C 2Voltage V 2The rest may be inferred, can try to achieve voltage detecting node C 0～C nVoltage.In present embodiment, first coupling is counted voltage detecting node C 0Ground connection, so reference voltage is ground voltage 0V, that is first coupling is counted voltage detecting node C 0Voltage be 0V.
Fig. 3 shows the circuit diagram according to the voltage detecting circuit of one embodiment of the invention.In present embodiment, select circuit 220 to comprise one first selected cell 221, one second selected cell 222 and a selection control circuit 223.First selected cell 221 couples those odd number voltage detecting nodes C 1... and C nAnd a first input end 211 of voltage difference generation circuit 210, in order under the control of selecting control circuit 223, from those odd number voltage detecting nodes C 1... and C nIn select a voltage detecting node, and voltage that will this selecteed voltage detecting node is exported to the first input end 211 that voltage difference produces circuit 210.Second selected cell 222 couples those even number voltage detecting nodes C 0, C 2... and C N-1And one second input end 212 of voltage difference generation circuit 210, in order under the control of selecting control circuit 223, from even number voltage detecting node C 0, C 2... and C N-1In select a voltage detecting node, and voltage that will this selecteed voltage detecting node is exported to second input end 212 that voltage difference produces circuit 210.In an embodiment, selected cell 221 and 222 can be realized with a multiplexer.In another embodiment, selected cell 221 and 222 is to realize with a plurality of switches, because the utilization of switch is the common knowledge in present technique field with control, the present technique field has knows that usually the knowledgeable can utilize existing switch and aforementioned selection control circuit 223 to implement the present invention according to the relevant exposure of selecting circuit of the present invention.
More specifically, in the time will detecting one first battery unit 111 of those battery units 110, first selected cell 221 is from those odd number voltage detecting nodes C 1... and C nMiddle selection couples the voltage detecting node C of one first electrode 1b (positive electrode) of first battery unit 111 1And export the first electrode 1b (or voltage detecting node C 1) one first voltage V 1Produce circuit 210 to voltage difference.Second selected cell 222 is from those even number voltage detecting nodes C 0, C 2... and C N-1Middle selection couples the voltage detecting node C of one second electrode 1a (negative electrode) of first battery unit 111 0And export the second electrode 1a (or voltage detecting node C 0) one second voltage V 0Produce circuit 210 to voltage difference.Voltage difference produces the first voltage V of circuit 210 according to first battery unit 111 1And the second voltage V 0Record and export the voltage difference of first battery unit 111.In present embodiment, voltage difference produces circuit 210 can be an amplifier, and amplifier is with the first voltage V 1And the second voltage V 0Subtract each other and multiply by behind the gain coefficient to obtain the voltage difference of first battery unit 111, in the present embodiment, this gain coefficient is made as 1 with simplified illustration.
In the time will detecting one second battery unit 112 of those battery units 110,221 selections of first selected cell couple the voltage detecting node C of one first electrode (negative electrode) of second battery unit 112 1And export first electrode (or voltage detecting node C 1) one first voltage V 1Produce circuit 210 to voltage difference.222 selections of second selected cell couple the voltage detecting node C of one second electrode (positive electrode) of second battery unit 112 2And export second electrode (or voltage detecting node C 2) one second voltage V 2Produce circuit 210 to voltage difference.Voltage difference produces the first voltage V of circuit 210 according to second battery unit 112 1And the second voltage V 2Record and export the voltage difference of second battery unit 112.In the time will detecting a Nth battery unit N of those battery units 110,221 selections of first selected cell couple the voltage detecting node C of one first electrode (positive electrode) of Nth battery unit N nAnd export first electrode (or voltage detecting node C n) one first voltage V nProduce circuit 210 to voltage difference.222 selections of second selected cell couple the voltage detecting node C of one second electrode (negative electrode) of Nth battery unit N N-1And export second electrode (or voltage detecting node C N-1) one second voltage V N-1Produce circuit 210 to voltage difference.Voltage difference produces the first voltage V of circuit 210 according to Nth battery unit N nAnd the second voltage V N-1Record and export the voltage difference of Nth battery unit N.
Fig. 4 shows the circuit diagram according to the voltage detecting circuit of one embodiment of the invention.The voltage detecting circuit 200a of Fig. 4 embodiment is similar in appearance to the voltage detecting circuit 200 of Fig. 3 embodiment, so the identical symbol of components identical use, and the repetitive description thereof will be omitted.As shown in Figure 4, computing circuit 230 includes an analogy to digital quantizer (ADC) 231.Analogy to digital quantizer 231 will convert digital signal to from the anaiog signal that voltage difference produces circuit 210a, use the arithmetic element (figure indicates) for computing circuit 230 to carry out computing.
Voltage difference produces circuit 210a and comprises a subtrator 213 and a bleeder circuit 214, and voltage difference generation circuit 210a receives an offset voltage V Offset, the voltage difference that voltage difference generation circuit 210a is exported is on the occasion of (can also be negative value in an embodiment), is handled to offer computing circuit 230.More specifically, subtrator 213 can be an amplifier 213a.The first input end 211 of amplifier 213a is a positive input terminal; And its second input end 212 is a negative input end, right this first input end 211 also can be designed to negative input end, this moment, second input end 212 was positive input terminal, and all the other are impartial to change that to implement be that the present technique field has and knows that usually the knowledgeable can know by inference easily according to the present invention's exposure.Therefore, as shown in Figure 4, can make amplifier 213a receive an offset voltage V Offset, make the voltage difference of those battery units 110 be respectively Δ V 1=V Offset+ (V 1-V 0) (first battery unit 111), Δ V 2=V Offset+ (V 1-V 2) (second battery unit 112), Δ V 3=V Offset+ (V 3-V 2) (the 3rd battery unit; Be not shown in figure), Δ V 4=V Offset+ (V 3-V 4) (the 4th battery unit; Be not shown in figure) ... and Δ V n=V Offset+ (V n-V N-1) (Nth battery unit N), use so that the voltage difference of those battery units 110 that amplifier 213a is exported is all the voltage (being positive voltage) of identical sign symbol in present embodiment.
Bleeder circuit 214 produces the voltage difference that suitable computing circuit 230 is handled according to the voltage difference of those battery units 110.In detail, as input voltage Δ V during in bleeder circuit 214, bleeder circuit 214 output voltage k Δ Y.The voltage difference of those battery units 110 can be converted to the voltage difference that suitable computing circuit 230 is handled by the size of adjusting the k value.In the present embodiment, aforementioned k value system is determined that by the value of two resistance the present technique field has knows that usually the knowledgeable can decide how to select resistance value according to 230 treatable voltage ranges of computing circuit, repeats no more in this.
Note that aforementioned offset voltage V OffsetWith bleeder circuit 214 is to increase elasticity of the invention process and propose, but if the processes voltage scope of computing circuit 230 is enough big, and can handle the voltage of different signs, then this offset voltage V OffsetAlso can omit with bleeder circuit 214 need not.
In addition, those voltage detecting nodes C 0～C nThe voltage of one of them is reference voltage, and computing circuit 230 is tried to achieve the voltage of other each voltage detecting nodes according to this reference voltage and according to the voltage difference of above-mentioned those battery units 110.For example with voltage detecting node C 0Ground connection, voltage detecting node C 0Voltage be reference voltage, that is voltage V 0Be 0V, and because the k value and the offset voltage V of bleeder circuit 214 OffsetFor known, computing circuit 230 can be obtained voltage detecting node C respectively according to following formula 0～C nVoltage: V 1=(k Δ V 1)/k-V Offset+ V 0, V 2=-(k Δ V 2)/k+V Offset+ V 1, V 3=(k Δ V 3)/k-V Offset+ V 2, V 4=-(k Δ V 4)/k+V Offset+ V 3... V n=(k Δ V n)/k-V Offset+ V N-1
According to one embodiment of the invention voltage detecting circuit 200 or 200a, use a voltage difference to produce circuit 210 or 210a, cooperate selected cell 221 and 222, record the voltage difference of a plurality of battery units 110 at different time points, so can access less error with respect to prior art.Its reason is in the prior art, use a plurality of different subtraction circuits to record the voltage difference of a plurality of different battery units, yet in producing, cause the error of voltage measurement, and can't more accurately detect the voltage difference of those battery units as the deviation of elements such as resistance often because of subtraction circuit.Compared to this,, then do not have the problems referred to above according to one embodiment of the invention.One embodiment of the invention has used less voltage difference to produce circuit 210 with respect to prior art in addition, so manufacturing cost is lower, and does not need complicated circuit to reduce the time cost of configuration design.
Fig. 5 shows the process flow diagram according to the voltage detection method of one embodiment of the invention.As shown in Figure 5, according to the voltage detection method of one embodiment of the invention, it is in order to detecting the voltage of a plurality of even number voltage detecting nodes and at least one odd number voltage detecting node, and this voltage detection method comprises following steps.
Step S02: control a voltage difference and produce circuit and those even number voltage detecting nodes and the internodal relation that couples of this at least one odd number voltage detecting, the voltage of using the voltage of counting the voltage detecting node for first coupling and the first odd number voltage detecting node exports voltage difference generation circuit to, make voltage difference produce circuit and produce one first voltage difference according to this, and export voltage difference generation circuit to for the voltage of the first odd number voltage detecting node and the voltage that second coupling is counted the voltage detecting node, make voltage difference produce circuit and produce one second voltage difference according to this.
Step S04: the voltage that known first coupling is counted the voltage detecting node be a reference voltage or benchmark voltage obtain the voltage that first coupling is counted the voltage detecting node.In another embodiment, step S04 can more comprise reception one offset voltage.
Step S06: the voltage of counting the voltage detecting node according to first voltage difference, first coupling obtains the voltage of the first odd number voltage detecting node.In an embodiment, step S06 can comprise first voltage difference is added that first coupling counts the voltage of voltage detecting node.In another embodiment, step S06 can comprise first voltage difference is added that first coupling counts the voltage of voltage detecting node and deduct offset voltage.
Step S08: the voltage according to second voltage difference, the first odd number voltage detecting node that obtained obtains the voltage that second coupling is counted the voltage detecting node.In an embodiment, the voltage that step S08 can comprise the first odd number voltage detecting node deducts second voltage difference.In another embodiment, the voltage that step S08 can comprise the first odd number voltage detecting node deducts second voltage difference and adds offset voltage.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, in not breaking away from spiritual scope of the present invention; when can doing a little change and retouching, thus protection scope of the present invention when with claim the person of being defined be as the criterion.In addition, arbitrary embodiment of the present invention or claim must not reached the disclosed whole purposes of the present invention or advantage or characteristics.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting protection scope of the present invention.

Claims (10)

1.一种电压检测电路，其特征在于，所述的电路包含：1. A voltage detection circuit, characterized in that, said circuit comprises: 多个偶数电压检测节点，包含一第一偶数电压检测节点与一第二偶数电压检测节点；A plurality of even voltage detection nodes, including a first even voltage detection node and a second even voltage detection node; 至少一个奇数电压检测节点，包含一第一奇数电压检测节点；At least one odd voltage detection node, including a first odd voltage detection node; 一电压差产生电路；a voltage difference generating circuit; 一选择电路，耦接所述的电压差产生电路、所述的偶数电压检测节点与所述的至少一个奇数电压检测节点，用来控制所述的电压差产生电路与所述的多个偶数电压检测节点及所述的至少一个奇数电压检测节点间的耦接关系，藉以供所述的第一耦数电压检测节点的电压与所述的第一奇数电压检测节点的电压输出至所述的电压差产生电路，使所述的电压差产生电路据以产生一第一电压差，并且供所述的第一奇数电压检测节点的电压与所述的第二耦数电压检测节点的电压输出至所述的电压差产生电路，使所述的电压差产生电路据以产生一第二电压差；以及A selection circuit, coupled to the voltage difference generation circuit, the even voltage detection node and the at least one odd voltage detection node, for controlling the voltage difference generation circuit and the plurality of even voltage detection nodes The coupling relationship between the detection node and the at least one odd voltage detection node, so that the voltage of the first coupled voltage detection node and the voltage of the first odd voltage detection node are output to the voltage A difference generating circuit, so that the voltage difference generating circuit generates a first voltage difference accordingly, and provides the voltage of the first odd voltage detection node and the voltage of the second even number voltage detection node to output to the said voltage difference generating circuit, so that said voltage difference generating circuit generates a second voltage difference accordingly; and 一运算电路，耦接所述的电压差产生电路，接收所述的第一电压差与所述的第二电压差，所述的运算电路已知所述的第一耦数电压检测节点的电压为一基准电压或已依据所述的基准电压求得所述的第一耦数电压检测节点的电压，所述的运算电路更依据所述的第一电压差、所述的第一耦数电压检测节点的电压得到所述的第一奇数电压检测节点的电压，并且依据所述的第二电压差、已得到的所述的第一奇数电压检测节点的电压得到所述的第二耦数电压检测节点的电压。An operation circuit, coupled to the voltage difference generating circuit, receives the first voltage difference and the second voltage difference, and the operation circuit knows the voltage of the first coupling voltage detection node It is a reference voltage or the voltage of the first coupling voltage detection node has been obtained according to the reference voltage, and the operation circuit is further based on the first voltage difference, the first coupling voltage detecting the voltage of the node to obtain the voltage of the first odd voltage detection node, and obtaining the second couple voltage according to the second voltage difference and the obtained voltage of the first odd voltage detection node sense the voltage of the node. 2.如权利要求1所述的电压检测电路，其特征在于，所述选择电路包含：2. The voltage detection circuit according to claim 1, wherein the selection circuit comprises: 一第一选择单元，耦接所述的多个偶数电压检测节点；a first selection unit, coupled to the plurality of even voltage detection nodes; 一第二选择单元，耦接所述的至少一个奇数电压检测节点，以及a second selection unit, coupled to the at least one odd voltage detection node, and 一选择控制电路，用来控制所述的第一选择单元及所述的第二选择单元，藉以控制所述的电压差产生电路与所述的多个偶数电压检测节点及所述的至少一个奇数电压检测节点间的耦接关系。A selection control circuit, used to control the first selection unit and the second selection unit, so as to control the voltage difference generation circuit, the plurality of even-numbered voltage detection nodes and the at least one odd-numbered Coupling relationship between voltage detection nodes. 3.如权利要求1所述的电压检测电路，其特征在于，所述的电压差产生电路包含：3. The voltage detection circuit according to claim 1, wherein the voltage difference generating circuit comprises: 一减法单元，用以将所述的第一耦数电压检测节点的电压与所述的第一奇数电压检测节点的电压相减以产生一第一电压差，将所述的第一奇数电压检测节点的电压与所述的第二耦数电压检测节点的电压相减以产生一第二电压差；以及A subtraction unit, used to subtract the voltage of the first coupled voltage detection node from the voltage of the first odd voltage detection node to generate a first voltage difference, and detect the first odd voltage The voltage of the node is subtracted from the voltage of the second coupling voltage detection node to generate a second voltage difference; and 一分压电路，依据所述的第一电压差及所述的第二电压差，分别产生配合所述的运算电路的所述的第一电压差及所述的第二电压差。A voltage dividing circuit, according to the first voltage difference and the second voltage difference, respectively generates the first voltage difference and the second voltage difference matching the operation circuit. 4.如权利要求1所述的电压检测电路，其特征在于，所述的电压差产生电路更接收一偏移电压，用以使所述的第一电压差及所述的第二电压差皆为相同正负符号的电压。4. The voltage detection circuit according to claim 1, wherein the voltage difference generating circuit further receives an offset voltage for making both the first voltage difference and the second voltage difference Voltages of the same sign. 5.如权利要求4所述的电压检测电路，其特征在于，所述的运算电路系依据一预设运算规则运算出所述的第一奇数电压检测节点的电压以及所述的第二耦数电压检测节点的电压，所述的预设运算规则包含将所述的第一电压差加上所述的第一耦数电压检测节点的电压并减去所述的偏移电压，以及包含将所述的第一奇数电压检测节点的电压减去所述的第二电压差并加上所述的偏移电压。5. The voltage detection circuit according to claim 4, wherein the operation circuit calculates the voltage of the first odd voltage detection node and the second coupling number according to a preset operation rule The voltage of the voltage detection node, the preset operation rule includes adding the first voltage difference to the voltage of the first coupler voltage detection node and subtracting the offset voltage, and adding the The second voltage difference is subtracted from the voltage of the first odd voltage detection node and the offset voltage is added. 6.如权利要求1所述的电压检测电路，其特征在于，所述的运算电路系依据一预设运算规则运算出所述的第一奇数电压检测节点的电压以及所述的第二耦数电压检测节点的电压，所述的预设运算规则包含将所述的第一电压差加上所述的第一耦数电压检测节点的电压，以及包含将所述的第一奇数电压检测节点的电压减去所述的第二电压差。6. The voltage detection circuit according to claim 1, wherein the operation circuit calculates the voltage of the first odd voltage detection node and the second coupling number according to a preset operation rule The voltage of the voltage detection node, the preset operation rule includes adding the first voltage difference to the voltage of the first couple voltage detection node, and adding the voltage of the first odd voltage detection node to voltage minus the second voltage difference. 7.一种电压检测方法，用以检测多个偶数电压检测节点及至少一个奇数电压检测节点的电压，其特征在于，所述的方法包含：7. A voltage detection method for detecting voltages of a plurality of even voltage detection nodes and at least one odd voltage detection node, characterized in that the method comprises: 控制一电压差产生电路与所述的偶数电压检测节点及所述的至少一个奇数电压检测节点间的耦接关系，藉以供所述的第一耦数电压检测节点的电压与所述的第一奇数电压检测节点的电压输出至所述的电压差产生电路，使所述的电压差产生电路据以产生一第一电压差，且供所述的第一奇数电压检测节点的电压与所述的第二耦数电压检测节点的电压输出至所述的电压差产生电路，使所述的电压差产生电路据以产生一第二电压差；controlling the coupling relationship between a voltage difference generating circuit and the even-numbered voltage detection node and the at least one odd-numbered voltage detection node, so as to provide the voltage of the first even-numbered voltage detection node and the first The voltage of the odd voltage detection node is output to the voltage difference generating circuit, so that the voltage difference generating circuit generates a first voltage difference accordingly, and the voltage of the first odd voltage detection node is compared with the The voltage of the second coupling voltage detection node is output to the voltage difference generating circuit, so that the voltage difference generating circuit generates a second voltage difference accordingly; 已知所述的第一耦数电压检测节点的电压为一基准电压或已依据所述的基准电压得到所述的第一耦数电压检测节点的电压；It is known that the voltage of the first coupling voltage detection node is a reference voltage or the voltage of the first coupling voltage detection node has been obtained according to the reference voltage; 依据所述的第一电压差、所述的第一耦数电压检测节点的电压得到所述的第一奇数电压检测节点的电压；以及Obtaining the voltage of the first odd voltage detection node according to the first voltage difference and the voltage of the first even number voltage detection node; and 依据所述的第二电压差、已得到的所述的第一奇数电压检测节点的电压得到所述的第二耦数电压检测节点的电压。The voltage of the second even-numbered voltage detection node is obtained according to the second voltage difference and the obtained voltage of the first odd-numbered voltage detection node. 8.如权利要求7所述的电压检测方法，其特征在于，所述的得到所述的第一奇数电压检测节点的电压的步骤，包含：将所述的第一电压差加上所述的第一耦数电压检测节点的电压；以及8. The voltage detection method according to claim 7, wherein the step of obtaining the voltage of the first odd voltage detection node comprises: adding the first voltage difference to the the voltage of the first coupling voltage detection node; and 所述的得到所述的第二耦数电压检测节点的电压的步骤，包含：将所述的第一奇数电压检测节点的电压减去所述的第二电压差。The step of obtaining the voltage of the second coupled voltage detection node includes: subtracting the second voltage difference from the voltage of the first odd voltage detection node. 9.如权利要求7所述的电压检测方法，其特征在于，控制一电压差产生电路与所述的偶数电压检测节点及所述的至少一个奇数电压检测节点间的耦接关系的步骤，包含接收一偏移电压，用以使所述的第一电压差及所述的第二电压差皆为相同正负符号的电压。9. The voltage detection method according to claim 7, wherein the step of controlling the coupling relationship between a voltage difference generating circuit and the even voltage detection node and the at least one odd voltage detection node comprises An offset voltage is received so that the first voltage difference and the second voltage difference are voltages with the same positive and negative signs. 10.如权利要求9所述的电压检测方法，其中，所述的得到所述的第一奇数电压检测节点的电压的步骤，包含：将所述的第一电压差加上所述的第一耦数电压检测节点的电压并减去所述的偏移电压；以及10. The voltage detection method according to claim 9, wherein the step of obtaining the voltage of the first odd voltage detection node comprises: adding the first voltage difference to the first the voltage of the coupling voltage detection node and subtracting the offset voltage; and 所述的得到所述第二耦数电压检测节点的电压的步骤，包含：将所述的第一奇数电压检测节点的电压减去所述第二电压差并加上所述的偏移电压。The step of obtaining the voltage of the second even number voltage detection node includes: subtracting the second voltage difference from the voltage of the first odd voltage detection node and adding the offset voltage.
CN201010167750.XA 2010-04-26 2010-04-26 Voltage detection circuit and method thereof Expired - Fee Related CN102236080B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010167750.XA CN102236080B (en) 2010-04-26 2010-04-26 Voltage detection circuit and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010167750.XA CN102236080B (en) 2010-04-26 2010-04-26 Voltage detection circuit and method thereof

Publications (2)

Publication Number Publication Date
CN102236080A true CN102236080A (en) 2011-11-09
CN102236080B CN102236080B (en) 2014-07-30

Family

ID=44886919

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010167750.XA Expired - Fee Related CN102236080B (en) 2010-04-26 2010-04-26 Voltage detection circuit and method thereof

Country Status (1)

Country Link
CN (1) CN102236080B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107741570A (en) * 2017-11-16 2018-02-27 常州机电职业技术学院 Detection method of series lithium battery pack

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362627B1 (en) * 1998-03-06 2002-03-26 Matsushita Electric Industrial Co., Ltd. Voltage measuring instrument with flying capacitor
JP2002139522A (en) * 2000-11-02 2002-05-17 Matsushita Electric Ind Co Ltd Stacked voltage measurement device
CN101093245A (en) * 2006-06-12 2007-12-26 美国凹凸微系有限公司 Apparatus and method for detecting battery pack voltage
CN101144836A (en) * 2006-09-11 2008-03-19 精拓科技股份有限公司 Voltage detection circuit and method thereof
JP2009099473A (en) * 2007-10-19 2009-05-07 Panasonic Ev Energy Co Ltd Abnormality detecting device for power storage device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362627B1 (en) * 1998-03-06 2002-03-26 Matsushita Electric Industrial Co., Ltd. Voltage measuring instrument with flying capacitor
JP2002139522A (en) * 2000-11-02 2002-05-17 Matsushita Electric Ind Co Ltd Stacked voltage measurement device
CN101093245A (en) * 2006-06-12 2007-12-26 美国凹凸微系有限公司 Apparatus and method for detecting battery pack voltage
CN101144836A (en) * 2006-09-11 2008-03-19 精拓科技股份有限公司 Voltage detection circuit and method thereof
JP2009099473A (en) * 2007-10-19 2009-05-07 Panasonic Ev Energy Co Ltd Abnormality detecting device for power storage device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107741570A (en) * 2017-11-16 2018-02-27 常州机电职业技术学院 Detection method of series lithium battery pack

Also Published As

Publication number Publication date
CN102236080B (en) 2014-07-30

Similar Documents

Publication Publication Date Title
KR102446380B1 (en) Method and battery management sytem for cell balancing
CN100585423C (en) Battery Fuel Gauge Circuit
CN108603903B (en) Apparatus and method for calculating insulation resistance of battery
CN102074766B (en) Battery pack and method of sensing voltage of the battery pack
CN102195314B (en) Circuit and method for balancing battery cells
US9041353B2 (en) Battery fuel gauge apparatus
JP2019522215A (en) Battery management apparatus and method for calibrating the state of charge of a battery
US10156613B2 (en) Voltage detection device
JP2009081981A (en) Charge state optimizing apparatus and battery pack system provided therewith
CN104541431A (en) Voltage detection device and equalization device
Gao et al. State‐of‐charge estimation and active cell pack balancing design of lithium battery power system for smart electric vehicle
US9419644B2 (en) System, circuit and method for converting a differential voltage signal including a high common mode voltage component to a ground referenced signal for battery voltage managment
JP2017112677A (en) Battery pack monitoring system
CN113972724B (en) Detection circuit and method, communication device and method, battery balancing control method
CN113552490B (en) A Reconfigurable Battery Pack SOC Estimation Method Based on Rest Recovery Effect
JP2008082731A (en) Laminated voltage detection device
US8427132B2 (en) Voltage detection circuit and method thereof
US9977092B2 (en) Voltage monitoring device
CN102236080A (en) Voltage detection circuit and method thereof
CN103762626A (en) Equalizing charge control circuit
JP6145311B2 (en) Battery state detection device
TW201743533A (en) Balanced battery charging system
Chetri et al. A comprehensive review of active EV battery cell voltage balancing systems: current issues and prospective solutions
CN222016211U (en) A passive balancing battery management system
JP2009072038A (en) Battery voltage detection apparatus and control method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140730

Termination date: 20160426