CN205882736U

CN205882736U - Voltage supervision device and vehicle of a plurality of battery modules

Info

Publication number: CN205882736U
Application number: CN201620420540.XU
Authority: CN
Inventors: 张文斌; 樊峰; 樊一峰; 徐勋高; 王英; 吴志文
Original assignee: Faraday and Future Inc
Current assignee: Faraday and Future Inc
Priority date: 2016-05-11
Filing date: 2016-05-11
Publication date: 2017-01-11
Anticipated expiration: 2026-05-11

Abstract

The utility model relates to a voltage supervision device and vehicle of a plurality of battery modules belongs to the battery management technology field. The utility model discloses an in the voltage supervision device, gathering or keeping watch on under the circumstances of a plurality of battery modules at voltage supervision integrated circuit, consider voltage acquisition who is in a certain cell that pressure drop that the connecting piece between the battery module produced borders on the connecting piece in charge and discharge circuit or the influence that the control produced, the pressure drop of calculating this connecting piece through the electric current of gathering this charge and discharge circuit is as the offset voltage, and then definite this cell's voltage supervision value. The utility model discloses a voltage supervision device is favorable to reducing voltage supervision integrated circuit's use, reduce cost to voltage supervision to cell is accurate.

Description

The voltage monitoring device of multiple battery modules and vehicle

Technical field

This utility model belongs to technical field of battery management, relates to using a monitoring voltage integrated circuit to multiple series connection Battery unit in the battery modules connected carries out the voltage monitoring device of monitoring voltage and uses this voltage monitoring device Vehicle.

Background technology

In technical field of battery management, the energy module constituted for many battery modules is needed to carry out battery management, side Just the needs of battery management, it is desirable to each battery unit in each battery modules is carried out such as monitoring voltage, accordingly, it would be desirable to Accurate acquisition or detection obtain the magnitude of voltage of each battery unit as monitoring voltage value.

It is currently, there are various types of special IC (ASIC) to gather often as monitoring voltage integrated circuit (IC) The magnitude of voltage of each battery unit in individual battery modules, such as, the LTC6804 (6-12) of Linear (LT) company, Texas Instrument (TI) bq76PL455 (6-16) and bq76PL536 (3-6) of company, the MC33771 (6-of Freescale (Freescale) company 14) etc.；Further, a monitoring voltage integrated circuit (IC) is generally used to carry out each battery in one battery modules of corresponding collection The magnitude of voltage of unit, say, that need each battery modules arranges a monitoring voltage integrated circuit (IC).

Utility model content

The purpose of this utility model is, it is achieved a monitoring voltage integrated circuit can accurately monitor multiple being connected in series The magnitude of voltage of battery modules.

For realizing object above or other purposes, this utility model provides techniques below scheme.

According to one side of the present utility model, it is provided that the voltage monitoring device of a kind of battery modules, for the most N number of string M the battery unit being in charging and discharging circuit in the battery modules that connection connects each carry out monitoring voltage, wherein, phase It is provided with the connector with the first resistance value between battery modules and (i+1) individual described battery modules described in adjacent i-th, N is the integer more than or equal to 2, and 1≤i≤(N-1), M are the integer more than N；

Wherein, described voltage monitoring device includes:

Monitoring voltage integrated circuit, it is configured with the first collection terminal and the second collection terminal, described first collection terminal and Two collection terminals bridge each described connector arbitrary described battery unit adjacent with the two ends of this connector to form this battery The voltage acquisition circuit of unit；And

First compensating module, its be configured to based on the first sample rate current in the described charging and discharging circuit acquired and First resistance value of described connector is calculated the first compensation voltage；

Wherein, described voltage monitoring device is configured to based on described monitoring voltage integrated circuit acquisition described first and adopts Collection end and the second collection terminal between magnitude of voltage and the most described first compensate voltage be calculated described first collection terminal and The monitoring voltage value of the battery unit of the second collection terminal correspondence bridging.

According to the voltage monitoring device of this utility model one embodiment, wherein, also include: the first current acquisition parts, its It is configured to the electric current gathering described charging and discharging circuit as described first sample rate current.

In one example, described first current acquisition parts and/or the first compensating module are configured in battery management system In.

In a further example, described first current acquisition parts and/or the first compensating module are configured in described voltage prison Depending in integrated circuit.

According to the voltage monitoring device of the another embodiment of this utility model, wherein, also include:

Second current acquisition parts, its balanced discharge being configured to gather each battery unit being in balanced discharge process The electric current in loop is as the second sample rate current；And

Second compensating module, it is configured to be calculated the second electricity based on described second sample rate current and the second resistance value Pressure offset, wherein said second resistance value is balanced discharge loop and this battery of each battery unit of balanced discharge process The resistance value of the multiplexing part of the voltage acquisition circuit of any battery unit that unit is adjacent；

Wherein, described voltage monitoring device is also structured to balanced discharge based on described monitoring voltage integrated circuit acquisition The magnitude of voltage of any battery unit that each battery unit of process is adjacent and the most described second compensates voltage and calculates Monitoring voltage value to the adjacent any battery unit of each battery unit of balanced discharge process.

Further, described second compensating module is also structured to based on described second sample rate current and the 3rd resistance value meter Calculation obtains tertiary voltage offset, and wherein said 3rd resistance value is the balanced discharge of each battery unit of balanced discharge process The resistance value of the multiplexing part of self corresponding voltage acquisition circuit of loop and this battery unit；

Wherein, described voltage monitoring device is also structured to balanced discharge based on described monitoring voltage integrated circuit acquisition The magnitude of voltage of each battery unit of process and the most described 3rd compensates voltage calculating and is equalized each of discharge process The monitoring voltage value of battery unit.

Further, described multiplexing part is adopting of described balanced discharge loop and correspondence described voltage acquisition circuit multiplexing Line-transect, this sampling line connects described monitoring voltage integrated circuit and described battery modules.

In one example, described second current acquisition parts and/or the second compensating module are configured in battery management system In.

In a further example, described second current acquisition parts and/or the second compensating module are configured in described voltage prison Depending in integrated circuit.

According to the voltage monitoring device of this utility model a further embodiment, wherein, also include for putting described voltage prison Monitoring units circuit socket and the one or more element circuits being connected to described monitoring units circuit socket depending on integrated circuit Extension socket.

Further, described monitoring units circuit socket is 1, and described element circuit extension socket is that (N-1) is individual, 1 Described monitoring voltage integrated circuit and the most corresponding N number of battery mould being connected in series of (N-1) individual described element circuit extension socket Group is arranged, 1 described monitoring voltage integrated circuit is disposed in the position of opposite central.

According to another aspect of the present utility model, it is provided that a kind of vehicle, it includes energy storing device, and described energy stores Device is provided with multiple battery modules being connected in series and above-mentioned voltage monitoring device or the integrated electricity of above-mentioned monitoring voltage Road.

In one embodiment, described vehicle is electric vehicle or motor vehicle driven by mixed power.

Voltage monitoring device of the present utility model can accurately monitor the magnitude of voltage of multiple battery modules being connected in series, and has It is beneficial to reduce the use of monitoring voltage integrated circuit, reduce cost, and accurate to the monitoring voltage of battery unit.

Accompanying drawing explanation

From combine accompanying drawing described further below, it will make above and other purpose of the present utility model and advantage more The clearest.

Fig. 1 is the structural representation of the voltage monitoring device of the battery modules according to this utility model one embodiment.

Fig. 2 is the modular structure signal of the monitoring voltage integrated circuit of the battery modules according to this utility model one embodiment Figure.

Fig. 3 is the structural representation of the voltage monitoring device of the battery modules according to the another embodiment of this utility model.

Fig. 4 is the structural representation of the voltage monitoring device of the battery modules according to this utility model a further embodiment.

Fig. 5 is at the voltage acquisition schematic diagram of a balanced discharge situation for the voltage monitoring device of embodiment illustrated in fig. 4.

Fig. 6 is the voltage monitoring device voltage acquisition schematic diagram in another balanced discharge situation of embodiment illustrated in fig. 4.

Fig. 7 is the schematic flow sheet of the voltage monitoring method of the battery modules according to this utility model one embodiment.

Fig. 8 is the structural representation of the vehicle according to this utility model one embodiment.

Detailed description of the invention

This utility model is more fully described, shown in the drawings of of the present utility model exemplary now with reference to accompanying drawing Embodiment.But, this utility model can realize according to the most different forms, and is not construed as being limited to explain here The embodiment stated.On the contrary, it is provided that these embodiments make the disclosure become thorough and complete, and by complete for design of the present utility model Entirely pass to those skilled in the art.In accompanying drawing, identical label refers to identical element or parts, therefore, by omission to it Description.

Some block diagrams shown in accompanying drawing are functional entitys, it is not necessary to must be with the most independent entity phase Corresponding.Can use software form to realize these functional entitys, or in one or more hardware modules or integrated circuit Realize these functional entitys, or in different processor device and/or microcontroller device, realize these functional entitys.

Fig. 1 show the structural representation of the voltage monitoring device of the battery modules according to this utility model one embodiment. In this embodiment, voltage monitoring device example is for the battery to two of which battery modules (i.e. battery modules 110 and 120) Unit carries out monitoring voltage, it is to be understood that, the quantity of the battery modules that voltage monitoring device simultaneously monitors not is restrictive. Battery modules 110 and battery modules 120 are all mainly made up of 12 battery units, 12 battery units by 6 strings 2 and in the way of Arrangement；Such as, inside battery modules 110, battery unit 110₁₁, battery unit 110₁₂To battery unit 110₁₆It is sequentially connected in series Ground connects formation string battery unit, battery unit 110₂₁, battery unit 110₂₂To battery unit 110₂₆Connect with being sequentially connected in series Forming another row battery unit, two row battery units in parallel define the battery modules 110 of this utility model embodiment together； Similarly, inside battery modules 120, battery unit 120₁₁, battery unit 120₁₂To battery unit 120₁₆Connect with being sequentially connected in series Connect formation string battery unit, battery unit 120₂₁, battery unit 120₂₂To battery unit 120₂₆Connect formation with being sequentially connected in series Another row battery unit, two row battery units in parallel define the battery modules 120 of this utility model embodiment together.Right Each battery list when battery unit in battery modules 110 or 120 carries out monitoring voltage, to wherein any string battery unit Unit carries out monitoring voltage, is equivalent to the battery unit that another row battery unit is corresponding carried out monitoring voltage the most simultaneously, namely Equally monitored, such as, to battery unit 110₁₂The magnitude of voltage that sampling or detection obtain i.e. correspondence is equal to battery unit 110₂₂The magnitude of voltage that sampling or detection obtain, battery unit 110₂₂Equally monitored.In Fig. 1 and figure 2 below to shown in Fig. 5 Example in, the battery unit of the dotted line line respective column in battery modules represents the battery unit equally monitored, battery The battery unit realizing line respective column in module is monitored practically, wherein, which selects in multiple row battery unit arranged side by side String is not restrictive by practical surveillance.

It should be noted that the cell array of the battery modules in Fig. 1 and Fig. 2 to Fig. 5 of the present utility model In, illustrate the arrangement position in an array of each battery unit for convenience, the label XXX of battery unit in figure_YZIn, XXX table Showing the battery modules at this battery unit place, the first figure place Y in subscript YZ represents that this battery unit is in this battery modules Columns, the second figure place Z in subscript YZ represents in the string of this battery unit series connection in this battery modules Z (or Z OK) battery unit.Such as, battery unit 110₂₁Represent that it is in battery modules 110, and be positioned at the 1st the (or the 1st of the 2nd row Battery unit OK).

It should be noted that in each battery modules, the number of its included battery unit be not limited to above or Below example, its concrete arrangement mode is not the embodiment being limited to above and below.Multiple in each battery modules Can be identical between battery unit, such as, same model, identical running voltage etc., battery unit can be with monomer electricity The form performance in pond.

The battery modules 110 and 120 being connected in series may be constructed battery bag, such as hybrid vehicle or electric automobile Battery bag, it is to be understood that the number of the battery modules included by battery bag is not limited to illustrate embodiment.

Battery modules 110 and 120 can realize being connected in series by connector 210, and connector 210 can be such as to conflux The conductors such as bar (Busbar) or wire harness, the battery unit of the two ends of connector 210 adjacent different battery modules respectively, i.e. battery list Unit 110₁₆With battery unit 120₁₁.Owing to connector 210 is in the charging and discharging circuit of battery modules 110 and 120, discharge and recharge Charge or discharge electric current I in loop₁Through connector 210 and pressure drop can be produced.

Utility model people notice, due between battery modules 110 and 120 distance arrange longer (such as may be 10 More than centimetre) etc. factor, resistance value R of connector 210₁Increase, meanwhile, charge or discharge electric current I₁Bigger, such as can reach More than 500A, therefore, the pressure drop produced during the connector 210 charge or discharge in charging and discharging circuit be can not ignore.Even Fitting 210 is owing to being simultaneously on the voltage acquisition circuit of its adjacent a certain battery unit, and therefore its pressure drop produced is easy It is reflected in a certain battery unit (110 adjacent to connector 210 two ends₁₆Or 120₁₁) voltage sample value in, therefore, this electricity The voltage sample of pool unit can not accurately reflect the virtual voltage of battery unit, easily causes monitoring voltage inaccurate.

Continue as it is shown in figure 1, voltage monitoring device also includes monitoring voltage integrated circuit 220, in this embodiment, voltage Monitor that integrated circuit 220 may be selected to be the LTC6804 (6-12) of Linear (LT) company, Texas Instrument (TI) company The chips such as the MC33771 (6-14) of bq76PL455 (6-16) or Freescale (Freescale) company.In above chip model, The first bit digital in bracket represents the number of the minimum battery cell voltage simultaneously gathered of these chip needs, second in bracket Bit digital represents the number of the battery cell voltage that this chip is at best able to gather simultaneously, such as, for chip LTC6804 (6- 12), it at least needs 6 battery cell voltages of the most corresponding collection, i.e. needs at least 6 battery units to be carried out voltage prison Depending on, it is at best able to 12 battery cell voltages of the most corresponding collection, i.e. 12 battery units can be carried out monitoring voltage.Cause This, if based on currently existing scheme, when monitoring battery modules 110 or 120 so that a LTC6804 (6-12) is corresponding, LTC6804 (6-12) is the most sufficiently applied, and, the quantity required of LTC6804 (6-12) chip is also greatly increased.

In this embodiment, a monitoring voltage integrated circuit 220 is not limited only to gather the string within a battery modules The magnitude of voltage of the battery unit that connection connects, such as, monitoring voltage integrated circuit 220 gathers 2 battery moulds being connected in series simultaneously Each corresponding magnitude of voltage in be connected in series 12 battery units in the charging and discharging circuit of group 110 and 120, for often Individual battery unit, is respectively formed corresponding voltage acquisition circuit by monitoring voltage integrated circuit 220.

Using chip LTC6804 (6-12) as example with monitoring voltage integrated circuit 220, it is simultaneously to 12 battery units (i.e. battery unit 110₁₁To 110₁₆With battery unit 120₁₁To 120₁₆) carry out voltage sample or detection, specifically, LTC6804 (6-12) 13 collection terminals or pin connect with connected mode as shown in Figure 1 respectively, and the most adjacent battery unit is indirectly Enter a collection terminal or pin carries out voltage acquisition, can return by correspondence one voltage acquisition of composition between two collection terminals or pin Road, the magnitude of voltage of the collected i.e. corresponding a certain battery unit of pressure reduction between two collection terminals or pin.

But, for the battery unit 120 of one end connection of connector 210₁₁, due to the battery list in different battery modules Unit 120₁₁With battery unit 110₁₆Between introduce connector 210, a collection terminal of LTC6804 (6-12) or pin are to connect Enter at battery unit 110₁₆With between connector 210, another collection terminal of LTC6804 (6-12) or pin are to access at battery Unit 120₁₁Negative pole one end, so, the adjacent collection terminal of two of which of LTC6804 (6-12) or pin are that corresponding bridging connects Part 210 and battery unit 120₁₁, thus define battery unit 120₁₁Corresponding voltage acquisition circuit, connector 210 is in this On voltage acquisition circuit, therefore, the magnitude of voltage V that the adjacent collection terminal of two above gathers₀Reflection is battery unit 120₁₁Electricity Pressure and the connector 210 pressure drop sum in charge and discharge process, it can not truly reflect battery unit 120₁₁Voltage.

To this end, in this embodiment, voltage monitoring device is additionally provided with current sample parts 230 and compensating module 240.Its In, current sample parts 230 can gather the electric current of the charging and discharging circuit residing for connector 210 as sample rate current, i.e. electric current I₁, in this embodiment, current sample parts 230 can be arranged in battery management system 900, in battery management system 900 Can be as the current sample parts 230 of this utility model embodiment for gathering the parts of the charging and discharging currents of battery bag.? In one embodiment, compensating module 240 can also be arranged in battery management system 900, and it specifically can pass through PLC technology Devices etc. realize, and compensating module 240 is coupled to current sample parts 230 adopting of can obtaining that current sample parts 230 are gathered Sample electric current I₁, compensating module 240 is such as had resistance value R of connector 210 correspondence by programmably input₁, sample rate current I₁It is multiplied by Resistance value R₁I.e. can obtain compensation voltage V₁, it is i.e. corresponding to the connector 210 pressure drop in charge and discharge process.

What voltage monitoring device was based further on monitoring voltage integrated circuit 220 is connected across connector 210 and battery unit 120₁₁The magnitude of voltage V that gathered of two adjacent collection terminals₀The compensation voltage V obtained with compensating module 240₁It is calculated magnitude of voltage V₁₁, in this embodiment, the sample rate current I of connector 210₁The electricity of direction and voltage acquisition circuit residing for connector 210 Stream (this electric current relative sample electric current I₁For the least) direction is identical, therefore, calculates V by relationship below (1)₁₁:

V₁₁= V₀-V₁= V₀-(I₁×R₁) (1).

Further, voltage monitoring device is by this magnitude of voltage V₁₁As battery unit 120₁₁Monitoring voltage value, this voltage supervise Apparent value can accurately reflect this battery unit 120₁₁Virtual voltage, therefore, voltage monitoring device is to battery unit 120₁₁Voltage Monitor more accurate and effective.

It is to be appreciated that the above calculating electricity of voltage monitoring device can be realized by configuring battery management system 900 Pressure value V₁₁Process completes in battery management system 900, it is also possible to realize voltage prison by configuring monitoring voltage integrated circuit 220 The above calculating magnitude of voltage V of view apparatus₁₁Process completes in monitoring voltage integrated circuit 220, it is also possible to have calculation function Compensating module 240 in realize the above calculating magnitude of voltage V of voltage monitoring device₁₁Process, even can also set up and be independently arranged Corresponding calculation processing apparatus realizes the above calculating magnitude of voltage V of voltage monitoring device₁₁Process.

It should be noted that for battery unit 120₁₁Outside other monitored battery units, their both positive and negative polarity Two ends are all to be connected across on two collection terminals of monitoring voltage integrated circuit 220 or pin to form corresponding voltage acquisition circuit, Being not introduced into connector 210 in voltage acquisition circuit, therefore, the corresponding magnitude of voltage gathered can accurately reflect respective battery reflection substantially Voltage, therefore, it can the monitoring voltage value as respective battery unit.

In other embodiments, a collection terminal or the pin of LTC6804 (6-12) is to access at battery unit 120₁₁With Between connector, another collection terminal of LTC6804 (6-12) or pin are to access at battery unit 110₁₆Positive pole one end, this Sample, the adjacent collection terminal of two of which of LTC6804 (6-12) or pin are corresponding bridging connector 210 and battery unit 110₁₆, Thus form battery unit 110₁₆Voltage acquisition circuit.The electricity that the adjacent collection terminal of two of which of LTC6804 (6-12) gathers The reflection of pressure value is battery unit 110₁₆Voltage and the connector 210 pressure drop sum in charge and discharge process.By the most right Battery unit 120₁₁Similar processing mode, the most accurately obtain battery unit 110₁₆Monitoring voltage value.

In the voltage monitoring device of the battery modules of above example, a monitoring voltage integrated circuit 220 can be same Time such as two battery modules are carried out voltage sample, and, effectively prevent the voltage sample caused because of connector 210 and forbidden True problem, therefore, it can reduce the usage quantity of monitoring voltage integrated circuit 220, such as, if a battery bag includes 50 battery modules as shown in Figure 1, voltage monitoring device can only use 25 monitoring voltage integrated circuits 220, and voltage is supervised Depending on the usage quantity minimizing half of integrated circuit 220, greatly reduce the cost of voltage monitoring device.

It should be noted that the monitoring voltage integrated circuit 220 of this utility model embodiment is not limited to battery unit Carry out voltage sample, such as, other parameters (such as battery cell temperature) can also be sampled.

Fig. 2 show the modular structure of the monitoring voltage integrated circuit of the battery modules according to this utility model one embodiment Schematic diagram.In this embodiment, the function of the voltage monitoring device of figure 1 above embodiment is not the most all at monitoring voltage Completing in integrated circuit 220, the monitoring voltage integrated circuit 220 of this utility model embodiment is used not only for gathering 2 series connection even Each corresponding electricity in be connected in series 12 battery units in the charging and discharging circuit of the battery modules 110 and 120 connect Pressure value, and, it being configured with compensating module 240 therein, the compensating module 240 in monitoring voltage integrated circuit 220 can obtain The sample rate current I that obtaining current sample unit 230 is gathered₁, compensating module 240 can also be had connector by programmably input Resistance value R of 210 correspondences₁, sample rate current I₁It is multiplied by resistance value R₁I.e. can obtain compensation voltage V equally₁, it is i.e. corresponding to even The fitting 210 pressure drop in charge and discharge process.In one embodiment, monitoring voltage integrated circuit 220 is designed to programmable control Device processed, it can programmably input concrete corresponding resistance value R of connector 210₁。

In another alternative embodiment, even current sample parts 230 can also be arranged on monitoring voltage integrated circuit In 220, namely monitoring voltage integrated circuit 220 has simultaneously the charging and discharging circuit residing for battery modules is carried out current sample Function.

The monitoring voltage integrated circuit 220 of embodiment illustrated in fig. 2 is also based on the bridging of monitoring voltage integrated circuit 220 In connector 210 and battery unit 120₁₁The magnitude of voltage V that gathered of two adjacent collection terminals₀The benefit obtained with compensating module 240 Repay voltage V₁It is calculated magnitude of voltage V₁₁, the such as mode of relation above formula (1) calculates V₁₁, and by this magnitude of voltage V₁₁It is configured to Battery unit 120₁₁Monitoring voltage value, this monitoring voltage value can accurately reflect this battery unit 120₁₁Virtual voltage.Cause This, monitoring voltage integrated circuit 220 is the most accurately and effectively to battery unit 120₁₁Voltage be acquired, and equally Based on a monitoring voltage integrated circuit 220, two battery modules 110 and 120 can be carried out voltage acquisition and supervision, favorably In reducing cost.

The specific works principle of the monitoring voltage integrated circuit 220 of embodiment illustrated in fig. 2 and the voltage of embodiment illustrated in fig. 1 The operation principle of monitoring arrangement is essentially identical or similar, and this is no longer going to repeat them.It is to be understood that in example further below In voltage monitoring device, it can also convert based on the above voltage monitoring device to embodiment illustrated in fig. 1 and form monitoring voltage The mode of integrated circuit 220, conversion forms corresponding monitoring voltage integrated circuit (IC) similarly.

Fig. 3 show the structural representation of the voltage monitoring device of the battery modules according to the another embodiment of this utility model Figure.In this embodiment, voltage monitoring device example is for wherein three battery modules (i.e. battery modules 310,320 and 330) battery unit carries out monitoring voltage, it is to be understood that, the quantity of the battery modules that voltage monitoring device simultaneously monitors is not It is restrictive.Battery modules 310, battery modules 320 and battery modules 330 are all mainly made up of 12 battery units, 12 Battery unit by 4 string 3 and in the way of arrange；Such as, inside battery modules 310, battery unit 310₁₁, battery unit 310₁₂ To battery unit 310₁₄Connect formation string battery unit, battery unit 310 with being sequentially connected in series₂₁, battery unit 310₂₂To battery Unit 310₂₄Connect the another row battery unit of formation, battery unit 310 with being sequentially connected in series₃₁, battery unit 310₃₂To battery unit 310₃₄Connecting formation with being sequentially connected in series go back string battery unit, it is real that three row battery units in parallel define this utility model together Execute the battery modules 310 of example；The arrangement mode of the battery unit within battery modules 320 and battery modules 330 and battery modules 310 is identical.When the battery unit in battery modules 310 or 320 or 330 is carried out monitoring voltage, electric to wherein arbitrarily string Each battery unit of pool unit carries out monitoring voltage, is equivalent to enter the battery unit that another row battery unit is corresponding the most simultaneously Go monitoring voltage, namely equally monitored, such as, to battery unit 310₁₂The magnitude of voltage that sampling obtains i.e. correspondence is equal to right Battery unit 310₂₂Or battery unit 310₃₂The magnitude of voltage that sampling obtains, battery unit 310₂₂With battery unit 310₃₂Equivalent Ground monitors.

Similarly, battery modules 310 and 320, battery modules 330 and 330 can realize series connection by connector 210 respectively Connecting, connector 210 can be such as the conductors such as busbar (Busbar) or wire harness, and the two ends of connector 210 adjoin not respectively With the battery unit of battery modules, such as, battery unit 310₁₄With battery unit 320₁₁, battery unit 320₁₄And battery unit 330₁₁.Owing to connector 210 is in the charging and discharging circuit of battery modules 310,320 and 320, charging in charging and discharging circuit or Discharge current I₁Through connector 210 and pressure drop can be produced.Similarly, connector 210 is owing to being simultaneously in its certain adjoined One battery unit (such as 310₁₄、320₁₄) voltage acquisition circuit on, therefore, connector 210 produce pressure drop be easily reflected in The a certain battery unit (such as 310 adjacent to connector 210 two ends₁₄、320₁₄) voltage sample in, therefore, this battery unit Voltage sample can not accurately reflect the virtual voltage of battery unit, easily cause monitoring voltage inaccurate.

Continue as it is shown on figure 3, voltage monitoring device also includes monitoring voltage integrated circuit 420, in this embodiment, voltage Monitor that integrated circuit 420 may be selected to be the LTC6804 (6-12) of Linear (LT) company, Texas Instrument (TI) company The chips such as the MC33771 (6-14) of bq76PL455 (6-16) or Freescale (Freescale) company.In this embodiment, one Individual monitoring voltage integrated circuit 420 is not limited only to gather the magnitude of voltage of the battery unit being connected in series in a battery modules, Such as, monitoring voltage integrated circuit 420 gathers the charging and discharging circuit of 3 battery modules being connected in series 310,320 and 330 simultaneously In be connected in series 12 battery units in each corresponding magnitude of voltage.Core is used with monitoring voltage integrated circuit 420 Sheet LTC6804 (6-12) is example, its have can the simultaneously corresponding ability gathering 12 battery cell voltages, therefore can be right 12 battery units (i.e. battery unit 310 of three modules₁₁To 310₁₄, battery unit 320₁₁To 320₁₄And battery unit 330₁₁To 330₁₄) carry out voltage sample or detection simultaneously.Specifically, 13 collection terminals or the pin of LTC6804 (6-12) is distinguished Connect with connected mode as shown in Figure 3, access a collection terminal between the most adjacent battery unit or pin carries out voltage and adopts Collection, correspondence can constitute a voltage acquisition circuit, the pressure between two collection terminals or pin between two collection terminals or pin Difference i.e. can gather out the magnitude of voltage of this battery unit.

In this embodiment, voltage monitoring device is arranged monitoring units circuit (Cell Monitoring Circuit, CMC) socket 451 and some element circuits extension (Cell Circuit Extension, CCE) socket 452, wherein, voltage is supervised It is inserted on CMC socket 451 depending on integrated circuit 420, can external sampling line or sampling wire harness connection on CMC socket 451 Corresponding position to battery modules 320 as shown in Figure 3, thus, the part collection terminal of monitoring voltage integrated circuit 420 or Pin can be coupled indirectly to the two ends of respective battery unit by CMC socket 451 and exterior strands, carries out forming this electricity The voltage acquisition circuit of pool unit；Not putting monitoring voltage integrated circuit 420 on CCE socket 452, it can external sampling line Or sampling wire harness is connected to the corresponding position in battery modules 310 or 330 as shown in Figure 3, and CCE socket 452 and CMC Connected by such as connector between socket 451, thus, the signal that the sampling line of CCE socket 452 is gathered can pass sequentially through CCE socket 452, CMC socket 451 transmit the appropriate section collection terminal to monitoring voltage integrated circuit 420 or pin, equally Form voltage acquisition circuit.

CCE socket 452 position based on the corresponding battery modules that they connect respectively with the placement location of CMC socket 451 Determine, wherein, if monitoring voltage integrated circuit 420 gathers the voltage of three or more than three battery modules being connected in series Value, CMC socket 451 correspondence is placed in the side of the battery modules being in middle position in three or more than three battery modules, CCE Socket 452 correspondence is placed in the side of other battery modules, such as, outside the corresponding battery modules (320) connected of CMC socket 451 Each battery modules (310 or 330) be arranged in correspondence with a CCE socket 452, so, be conducive to shortening the length of sampling line And be conducive to the arrangement in good order of sampling line.The particular number of CCE socket 452 is not restrictive, and it can be according to electricity Pressure monitors that the quantity of the battery modules of the corresponding detection of integrated circuit 420 or collection determines.

Continue as it is shown on figure 3, due to the introducing of connector 210, equally exist asking of figure 1 above and embodiment illustrated in fig. 2 Topic, say, that the battery unit such as battery unit 310 that connector 210 one end is adjacent₁₄, due in different battery modules Battery unit 320₁₁With battery unit 310₁₄Between introduce connector 210, with monitoring voltage integrated circuit 420 as LTC6804 (6-12) being example, collection terminal of LTC6804 (6-12) is to access (such as being accessed) by CMC socket 451 and sampling line to exist Battery unit 320₁₁With between connector 210, another collection terminal of LTC6804 (6-12) is to access (such as by CMC socket 451, CCE socket 452 and sampling line access) at battery unit 310₁₄Positive pole one end, so, LTC6804 (6-12) is wherein Two adjacent collection terminals or pin are corresponding bridging connector 210 and battery unit 310₁₄, they are used for forming battery unit 310₁₄Voltage acquisition circuit, the magnitude of voltage V of collection₀Reflection is battery unit 310₁₄Voltage and connector 210 in charge and discharge Pressure drop sum in electric process, it can not truly reflect battery unit 310₁₄Voltage.For battery unit 320₁₄It is to exist Similar situation.

To this end, in this embodiment, voltage monitoring device also sets up current sample parts 430 and compensating module 440.Its In, current sample parts 430 can gather the electric current of the charging and discharging circuit residing for connector 210 as sample rate current, i.e. electric current I₁, in this embodiment, current sample parts 430 can be arranged in battery management system 900, in battery management system 900 Can be as the current sample parts 430 of this utility model embodiment for gathering the parts of the charging and discharging currents of battery bag.? In one embodiment, compensating module 440 can also be arranged in battery management system 900, and it specifically can pass through PLC technology Devices etc. realize, and compensating module 440 can obtain the sample rate current I that current sample parts 430 are gathered₁, compensating module 240 is such as Resistance value R of connector 210 correspondence is had by programmably input₁, sample rate current I₁It is multiplied by resistance value R₁I.e. can obtain compensation electricity Pressure V₁, it is i.e. corresponding to the connector 210 pressure drop in charge and discharge process.

What voltage monitoring device was based further on monitoring voltage integrated circuit 420 is connected across connector 410 and battery unit 310₁₄(or battery unit 320₁₄) the magnitude of voltage V that gathered of two adjacent collection terminals₀The compensation voltage obtained with compensating module 440 V₁It is calculated magnitude of voltage V₁₄, such as calculate based on relationship below (2):

V₁₄= V₀-V₁= V₀-(I₁×R₁) (2).

Voltage monitoring device is further by magnitude of voltage V₁₄As battery unit 310₁₄(or battery unit 320₁₄) voltage prison Apparent value, this monitoring voltage value can accurately reflect this battery unit 310₁₄(or battery unit 320₁₄) virtual voltage, therefore, electricity Pressure monitoring arrangement is to battery unit 310₁₄With battery unit 320₁₄Monitoring voltage more accurate and effective.

It is to be appreciated that the above calculating electricity of voltage monitoring device can be realized by configuring battery management system 900 Pressure value V₁₄Process completes in battery management system 900, it is also possible to realize voltage prison by configuring monitoring voltage integrated circuit 420 The above calculating magnitude of voltage V of view apparatus₁₄Process completes in monitoring voltage integrated circuit 420, it is also possible to have calculation function Compensating module 440 realize the above calculating magnitude of voltage V of voltage monitoring device₁₄Process, even can also set up and be independently arranged phase The calculation processing apparatus answered is to realize the above calculating magnitude of voltage V of voltage monitoring device₁₄Process.

Equally, the voltage prison of the relative embodiment illustrated in fig. 1 of monitoring voltage integrated circuit 220 of embodiment similar to Figure 2 Depending on the conversion of integrated circuit 220, in other embodiments, it is also possible to compensating module 440 and/or current sample parts 430 are set Putting in monitoring voltage integrated circuit 420, monitoring voltage integrated circuit 420 is configured to realize more than voltage monitoring device simultaneously Calculate magnitude of voltage V₁₄Process, therefore, it can with monitoring voltage integrated circuit 440 substantially realize shown in Fig. 3 monitoring voltage dress The function put.

In the voltage monitoring device of the battery modules of figure 3 above illustrated embodiment, a monitoring voltage integrated circuit 420 Such as three battery modules can be carried out voltage sample simultaneously, and, effectively prevent the voltage caused because of connector 210 and adopt The inaccurate problem of sample, therefore, it can the usage quantity of monitoring voltage integrated circuit 420 is reduced to original 1/3rd, While greatly reducing the cost of voltage monitoring device, the accuracy of monitoring voltage does not declines.

Based on figure 1 above to embodiment illustrated in fig. 3, it is to be understood that the voltage monitoring device of embodiment of the present utility model Or monitoring voltage integrated circuit can realize the monitoring voltage of the multiple battery modules being connected in series of other any arrangement modes Or gather, such as, battery unit is with 3 string 4 battery modules that arrange；According to the battery being connected in series in each battery modules The quantity of unit and monitoring voltage integrated circuit are at best able to the quantity of the most corresponding battery cell voltage gathered, permissible Specifically determine the quantity of the battery modules of the collection of each monitoring voltage integrated circuit correspondence or supervision.

Fig. 4 show the structural representation of the voltage monitoring device of the battery modules according to this utility model a further embodiment Figure；Fig. 5 show the voltage monitoring device of the embodiment illustrated in fig. 4 voltage acquisition schematic diagram when a balanced discharge situation, Fig. 6 It show the voltage monitoring device voltage acquisition schematic diagram in another balanced discharge situation of embodiment illustrated in fig. 4.Below in conjunction with Voltage monitoring device and the monitoring voltage principle of this utility model embodiment are described shown in Fig. 4 to Fig. 6.

First, the voltage monitoring device of contrast embodiment illustrated in fig. 4 and the voltage monitoring device of embodiment illustrated in fig. 3, its In identical label represent identical parts, this is no longer going to repeat them.Further, compared to the monitoring voltage of example shown in Fig. 3 Device, wherein the first current sample parts 531 and the current sample parts 430 in the voltage monitoring device of example shown in Fig. 3 Function with arrange the most identical, the first compensating module 541 and the current sample parts in the voltage monitoring device of example shown in Fig. 3 The function of 440 with arrange the most identical, describe the most one by one.Voltage in the voltage monitoring device of embodiment illustrated in fig. 4 The setting of the monitoring voltage integrated circuit 420 in the voltage monitoring device of example shown in supervision integrated circuit 520 and Fig. 3 and function The most essentially identical, their Main Differences is that monitoring voltage integrated circuit 520 is also connected or coupling with the second compensating module 542 Connect.

As shown in Figure 4, being additionally provided with the second current sample parts 532 in voltage monitoring device, it is used for gathering battery list Electric current in the balanced discharge loop of unit is as sample rate current, and this sample rate current is generally at the 100mA order of magnitude, compared to the first electricity The sample rate current (it can reach hundreds of ampere) that stream sample unit 531 collects is the least.This sample rate current sends to the Two compensating modules 542.Second compensating module 542 is configured to input the resistance of the sampling line related in balanced discharge loop Value, according to this resistance value and sample rate current size, (it is different from the first compensating module can be calculated another compensation voltage The 541 compensation voltage V obtained₁).

In this embodiment, the second current sample parts 532 are set and the second compensating module 542 is to compensate for a certain electricity The pressure drop that during pool unit balanced discharge, partial-equilibrium discharge loop (line of especially sampling) produces to this battery unit and The impact that the voltage acquisition of its adjacent battery unit produces.

In a kind of balanced discharge situation, as shown in fig. 5, it is assumed that with battery unit 330₁₁Needing balanced discharge is example, See Fig. 4, from battery unit 330₁₁Positive pole sequentially pass through sampling line 521b and CCE socket 452, equalizing resistance R₃(in Fig. 4 not Illustrate), CCE socket 452 and sampling line 521c to battery unit 330₁₁Negative pole, thus form balanced discharge loop；This equilibrium Discharge loop is in Figure 5 with resistance R₂, equalizing resistance R₃With resistance R₄Signal, the electric current in balanced discharge loop is I₂, it such as exists 100 milliamperes of orders of magnitude；Wherein, resistance R₂Signal is from battery unit 330₁₁Positive best equalizing resistance R₃Between balanced discharge return The resistance on road, resistance R₄Signal is from equalizing resistance R₃To battery unit 330₁₁Negative pole between the resistance in balanced discharge loop. The utility model people of the application notices, owing to the application needs to use a monitoring voltage integrated circuit to come multiple battery moulds The battery unit of group carries out voltage acquisition or supervision, and therefore, sampling line is inevitably lengthened out to original tens times even More, therefore, the resistance of the sampling line in balanced discharge loop becomes main impedance that is relatively big and that become balanced discharge loop, and And the pressure drop of the bigger voltage acquisition accuracy that can affect battery unit can be produced during balanced discharge.Therefore, exist In one embodiment, resistance R₂It is essentially equivalent to the resistance of sampling line 521b, resistance R₄It is essentially equivalent to the electricity of sampling line 521c Resistance, the CCE socket 452 in balanced discharge loop and the resistance etc. of connector being arranged between CCE socket 452 and CMC socket 451 All can be left in the basket with the resistance of relative sample line and disregard.Above resistance R₂With resistance R₄Can obtain beforehand through methods such as measurements And it is input to the second compensating module 542, equalizing resistance R₃The inside of monitoring voltage integrated circuit 520 can be specifically located at, Monitoring voltage integrated circuit 520 can also be arranged on outside, on such as CMC socket 451.

When carrying out balanced discharge in the manner illustrated in fig. 5, it should be noted that balanced discharge loop will be with battery unit 330₁₁ Voltage acquisition circuit fractional reuse, such as, resistance R₂With resistance R₄Corresponding balanced discharge loop feature is basic multiplexing, Resistance R₂With resistance R₄At battery unit 330₁₁Balanced discharge during the pressure drop that produces can by monitoring voltage integrated circuit 520 Corresponding collection terminal collect as corresponding battery unit 330₁₁The magnitude of voltage V collected_11’A part, therefore, this voltage Value V_11’Can not truly reflect now battery unit 330₁₁Voltage.

To this end, when balanced discharge, it is I that the second current sample parts 532 gather the electric current in balanced discharge loop₂, second Compensating module 542 obtains this electric current I from the second current sample parts 532₂, and combine resistance R₂With resistance R₄, it is calculated compensation Voltage, i.e. V_{11 compensate}=(R₂+R₄) × I₂.Voltage monitoring device is further according to magnitude of voltage V_11’With compensation voltage V_{11 compensate}Calculate V₁₁, It is specifically based on relationship below (3) to calculate:

V₁₁= V_11’-V_{11 compensate}= V_11’-(R₂+R₄) × I₂(3).

So, with calculated magnitude of voltage V₁₁As battery unit 330₁₁Monitoring voltage value, it can accurately reflect electricity Pool unit 330₁₁Virtual voltage during balanced discharge, accordingly, it is capable to gather more accurately and effectively to battery unit from Virtual voltage during balanced discharge.

When carrying out balanced discharge in the manner illustrated in fig. 5, should also be noted that battery unit 330₁₁Balanced discharge loop Will be with battery unit 330₁₂Voltage acquisition circuit, battery unit 320₁₄Voltage acquisition circuit there is also fractional reuse, the most just It is to say, battery unit 330₁₁Partial-equilibrium discharge loop be in battery unit 330₁₂Voltage acquisition circuit on or be in Battery unit 320₁₄Voltage acquisition circuit on

At battery unit 330₁₁Balanced discharge during and battery unit 330₁₂Voltage acquisition gatherer process in, Resistance R₄Corresponding balanced discharge loop feature is basic multiplexing, resistance R₄At battery unit 330₁₁Balanced discharge during The pressure drop produced can be collected as corresponding battery unit 330 by the corresponding collection terminal of monitoring voltage integrated circuit 520₁₂Gathered The magnitude of voltage V arrived_12’A part, therefore, this magnitude of voltage V_12’Can not truly reflect now battery unit 330₁₂Voltage.

To this end, at battery unit 330₁₁During balanced discharge, the second current sample parts 532 gather the electricity in balanced discharge loop Stream is I₂, the second compensating module 542 obtains this electric current I from the second current sample parts 532₂, and combine resistance R₄, it is calculated Compensate voltage, i.e. V_{12 compensate}=R₄×I₂.Voltage monitoring device is further according to magnitude of voltage V_12’With compensation voltage V_{12 compensate}Calculate V₁₂, tool Body calculates based on relationship below (4):

V₁₂= V_12’-V_{12 compensate}= V_12’-R₄×I₂(4).

So, with calculated magnitude of voltage V₁₂As battery unit 330₁₂Monitoring voltage value, it can accurately reflect electricity Pool unit 330₁₂At adjacent battery unit 330₁₁Virtual voltage during balanced discharge, accordingly, it is capable to more real Now to battery unit 330₁₂Virtual voltage during its adjacent battery unit is in balanced discharge.

Equally, at battery unit 330₁₁Balanced discharge during and battery unit 320₁₄The collection of voltage acquisition Cheng Zhong, resistance R₂Corresponding balanced discharge loop feature be basic multiplexing (although battery unit 330₁₁With battery unit 320₁₄ It is in different battery modules), resistance R₂At battery unit 330₁₁Balanced discharge during the pressure drop that produces can by voltage Monitor that the corresponding collection terminal of integrated circuit 520 collects as corresponding battery unit 320₁₄The magnitude of voltage V collected_14’One Part, this magnitude of voltage V_14’Can not truly reflect now battery unit 320₁₄Voltage.To this end, at battery unit 330₁₁Equilibrium During electric discharge, it is I that the second current sample parts 532 gather the electric current in balanced discharge loop₂(including its sense of current information), second Compensating module 542 obtains this electric current I from the second current sample parts 532₂, and combine resistance R₂, it is calculated compensation voltage, i.e. V_{14 compensate}=R₂×I₂.Voltage monitoring device is further according to magnitude of voltage V_14’With compensation voltage V_{14 compensate}Calculate V₁₄, it is specifically based on following Relational expression (5) calculates:

V₁₄= V_14’+ V_{14 compensate}= V_14’+ R₂×I₂(5).

So, with calculated magnitude of voltage V₁₄As battery unit 320₁₄Monitoring voltage value, it can accurately reflect electricity Pool unit 320₁₄At adjacent battery unit 330₁₁Virtual voltage during balanced discharge, accordingly, it is capable to more real Now to battery unit 320₁₄Virtual voltage during its adjacent battery unit is in balanced discharge.

It should be noted that at V₁₁And V₁₄Compensation calculation during, not do not consider the resistance R of connector 210₁Cause Pressure drop, this is owing to connector 210 is not in battery unit 330₁₁Balanced discharge loop on；Further, though connector 210 It is in battery unit 330₁₁On balanced discharge loop, the resistance R of connector 210₁The resistance that relative sample line 521b is mainly corresponding R₂It is relatively small, is not considering charging current I from charging and discharging circuit₁In the case of the pressure drop caused, balanced discharge process In, pressure drop produced by connector 210 is the least, can not consider.But, if connector 210 is in battery unit 330₁₁On balanced discharge loop and by relevant voltage acquisition circuit multiplexing, for improving the accuracy of voltage acquisition further, above V₁₁And V₁₄Compensation calculation process need to consider further the resistance R of connector 210₁The pressure caused during balanced discharge Fall.

Further, if also needing to consider the charging and discharging currents I of charging and discharging circuit₁The pressure drop that the connector 210 caused produces In the case of, in addition it is also necessary to consider the compensation voltage V that the first voltage compensation module 541 obtains₁= (I₁×R₁), that is, voltage Monitoring arrangement is further according to magnitude of voltage V_14’, compensate voltage V_{14 compensate}With compensation voltage V₁Calculate V₁₄, it is specifically based on relationship below (6) calculate:

V₁₄= V_14’+ V_{14 compensate}-V₁= V_14’+ R₂×I₂-(I₁×R₁) (6).

So, with calculated magnitude of voltage V₁₄As battery unit 320₁₄Monitoring voltage value, it not only considers phase Adjacent battery unit 330₁₁The impact during being in balanced discharge, its voltage acquisition or supervision produced, and consider and filling In discharge process, connector 210 on its voltage acquisition or monitors the impact produced.Therefore, magnitude of voltage V₁₄Can be more real Now to battery unit 320₁₄Virtual voltage.

Figure 5 above example illustrate one be connected in series in the battery unit of multiple battery modules when balanced discharge such as What is the need remove the impact of the voltage acquisition of the battery unit on this balanced discharge and how to eliminate the battery unit of this balanced discharge Impact on the voltage acquisition of adjacent battery unit.

In another balanced discharge situation, as shown in Figure 6, it is assumed that with battery unit 330₁₁With battery unit 330₁₂Need Wanting balanced discharge is example, wherein, and battery unit 330₁₁Balanced discharge loop same as shown in Figure 5；Similarly, battery unit 330₁₂Composition and the battery unit 330 in balanced discharge loop₁₁Composition substantially similar, its be mainly by resistance R₄, equilibrium electricity Resistance R₅With resistance R₆The loop of composition, wherein, resistance R₄It it is battery unit 330₁₁Balanced discharge loop and battery unit 330₁₂ The part that shared of balanced discharge loop, namely the part of multiplexing, resistance R₆Signal is from equalizing resistance R₅To battery unit 330₁₂Negative pole between the resistance in balanced discharge loop, resistance R₆It is essentially equivalent to the resistance of sampling line 521d, Ye Jijun The weighing apparatus CCE socket 452 of discharge loop and the resistance etc. of connector being arranged between CCE socket 452 and CMC socket 451 It is left in the basket with the resistance of relative sample line and disregards.Similarly, above resistance R₆Can obtain and quilt beforehand through methods such as measurements Input to the second compensating module 542, equalizing resistance R₅The inside of monitoring voltage integrated circuit 520 can be specifically located at, it is possible to Outside to be arranged on monitoring voltage integrated circuit 520.

When carrying out balanced discharge in mode shown in Fig. 6, it should be noted that battery unit 330₁₁Balanced discharge loop will With battery unit 330₂The part of balanced discharge loop multiplexing, i.e. resistance R₄Corresponding part, it is also and battery unit 330₁₁Voltage acquisition circuit fractional reuse, or with battery unit 330₁₂Voltage acquisition circuit fractional reuse.Cause This, voltage monitoring device calculate battery unit 330₁₁Or battery unit 330₁₂Monitoring voltage value time, not only need consider The pressure drop in the balanced discharge loop impact on voltage acquisition during self balanced discharge, in addition it is also necessary to consider adjacent battery unit It is in the pressure drop of the partial-equilibrium discharge loop impact on voltage acquisition during balanced discharge.Now, the second current sample portion Part 532 gathers battery unit 330₁₁The electric current I in balanced discharge loop₂, and gather battery unit 330 simultaneously₁₂Equilibrium put The electric current I in electricity loop₃, the second compensating module 542 obtains this electric current I from the second current sample parts 532₂And I₃.Further, based on Known resistance R₂With resistance R₄, for battery unit 330₁₁, it is calculated compensation voltage, i.e. V_{11 compensate}=(R₂+R₄) × I₂-R₄ ×I₃；Voltage monitoring device is further according to magnitude of voltage V_11’With compensation voltage V_{11 compensate}Calculate V₁₁, it is specifically based on relationship below (7) calculate:

V₁₁= V_11’-V_{11 compensate}= V_11’-(R₂+R₄) × I₂+ R₄×I₃(7).

Similarly, based on known resistance R₆With resistance R₄, for battery unit 330₁₂, it is calculated compensation voltage, i.e. V_{12 compensate}=(R₆+R₄) × I₃-R₄×I₂.Voltage monitoring device is further according to the magnitude of voltage V collected_12’With the second compensating module The 542 compensation voltage V obtained_{12 compensate}Calculate V₁₂, it is specifically based on relationship below (8) and calculates:

V₁₂= V_12’-V_{12 compensate}= V_12’-(R₆+R₄) × I₃+ R₄×I₂(8).

By above magnitude of voltage V₁₁And V₁₂Respectively as battery unit 330 under this balanced discharge situation₁₁And battery unit 330₁₂Monitoring voltage value, it will be more accurate.Balanced discharge situation shown in figure 6 above is actually balanced discharge shown in Fig. 5 The extension of situation, that takes into account influencing each other in the case of two adjacent battery unit balanced discharge at the same time.

It should be noted that the calculating compensating voltage of various embodiments above and/or the voltage as monitoring voltage value During the calculating of value, " adding " or " subtracting " is the sense of current according to voltage acquisition circuit and the sense of current in charging and discharging circuit Relation or determine with the relation of the sense of current on balanced discharge loop.

Voltage monitoring device below in conjunction with embodiment illustrated in fig. 4 illustrates the monitoring voltage of this utility model embodiment Method.

Fig. 7 show the schematic flow sheet of the voltage monitoring method of the battery modules according to this utility model one embodiment. In conjunction with figure 4 above to Fig. 7, its procedure is described.

First, step S710, monitoring voltage integrated circuit acquisition magnitude of voltage.Wherein, monitoring voltage integrated circuit 520 gathers The each monitored battery unit being in charging and discharging circuit of multiple battery modules (310,320 and 330) being connected in series Magnitude of voltage, be connected across each connector 210 and the adjacent battery unit (such as 310 of connector 210 including gathering₁₄Or 320₁₄) two collection terminals between magnitude of voltage, such as, the magnitude of voltage V of figure 3 above illustrated embodiment₀。

Step S721, the first current acquisition parts 531 gather the electric current I of charging and discharging circuit₁As the first sample rate current.Enter One step, step S722, the first compensating module 541 is calculated each battery unit (such as 310 affected by connector 210₁₄Or 320₁₄) corresponding the first compensation voltage.The compensation voltage V of this calculating process embodiment as shown in Figure 3₁Calculating process phase With, i.e. V₁= I₁×R₁, wherein, R₁For the resistance of connector 210, I₁Sample rate current for charging and discharging circuit.

Simultaneously, step S731, the second current acquisition parts 532 gather the electricity in the balanced discharge loop of each battery unit Flow as corresponding second sample rate current, this gatherer process and figure 5 above and the collection balanced discharge loop of embodiment illustrated in fig. 6 Electric current I₂And I₃Process identical.Further, step S732, second compensating module 542 is calculated and is affected by balanced discharge The second compensation voltage that each battery unit is corresponding, the calculating process of this second compensation voltage and V in Fig. 5 and Fig. 6 example_{11 compensate}、 V_{12 compensate}Or V_{14 compensate}Calculating process identical, whether can be affected by self balanced discharge according to this battery unit and/or whether be subject to The impact of adjacent cell balanced discharge determines the calculation of the second compensation voltage.

Further, step S740, compensate voltage and correspondence according to the first compensation voltage and/or second of each battery unit The magnitude of voltage that each battery unit gathers, is calculated the corresponding magnitude of voltage voltage monitoring value as this battery unit.This meter Calculation process is V in above and Fig. 5 and Fig. 6 example₁₁、V₁₂Or V₁₄Calculating process identical, be not described in detail in this.Need explanation It is if battery unit is only affected by connector 210, then to calculate voltage according to figure 3 above illustrated embodiment based on relational expression (2) Value V₁₁Method obtain its voltage monitoring value；If battery unit is only affected by self balanced discharge, then according to figure 5 above institute Show that embodiment calculates magnitude of voltage V based on relational expression (3)₁₁Method obtain its voltage monitoring value；If battery unit is only by phase The balanced discharge impact of adjacent battery unit, then calculate magnitude of voltage according to figure 5 above illustrated embodiment based on relational expression (4)/(5) V₁₂/V₁₄Method obtain its voltage monitoring value；If battery unit is both affected also by adjacent cell list by self balanced discharge Unit's balanced discharge impact, then calculate magnitude of voltage V according to figure 6 above illustrated embodiment based on relational expression (7)/(8)₁₁/V₁₂Method Obtain its voltage monitoring value；If battery unit had both been affected by connector 210 and had also been affected by adjacent cell balanced discharge, Then calculate magnitude of voltage V according to figure 5 above illustrated embodiment based on relational expression (6)₁₄Method obtain its voltage monitoring value；When So, the most do not affected by any cell balancing electric discharge if neither affected by connector 210, then the voltage gathered based on correspondence Value is as voltage monitoring value.

It should be noted that owing to the length of sampling line corresponding to different battery units is probably different, therefore, be in The resistance of the sampling line on balanced discharge loop is also probably different.The battery list that connect corresponding for CMC socket 451 Unit, owing to its sampling line may be relatively short, its produced pressure drop during balanced discharge is probably voltage acquisition precision In the range of being allowed, battery unit (the such as battery unit 320 that connect corresponding for CMC socket 451₁₁, battery unit 320₁₂, battery unit 320₁₃), it is possible to selectively using correspondence gather magnitude of voltage as voltage monitoring value.

Fig. 8 show the structural representation of the vehicle according to this utility model one embodiment.In this embodiment, vehicle 80 Dynamical system 800 at least use motor 840 to provide driving force, dynamical system 800 also to include energy storing device 810, energy Storage device 810 is provided with the battery bag that multiple battery modules being connected in series is formed, and also figure 1 above or figure are set 3 or the voltage monitoring device of embodiment illustrated in fig. 4, or also set up the monitoring voltage integrated circuit of figure 2 above illustrated embodiment, Voltage monitoring device or monitoring voltage integrated circuit are to each battery list being in charging and discharging circuit in multiple battery modules Unit carries out monitoring voltage.Dynamical system 800 also include electric machine control system 820, motor 840 one end arrange sensor 850, Vehicle control module 830.The electric power of energy storing device 810 output is by electric machine control system 820 and/or vehicle control module 830 control realization are on-demand, stably output provides to motor 840, control from realizing the driving to vehicle.

The vehicle of embodiment illustrated in fig. 8 is specifically as follows electric vehicle or motor vehicle driven by mixed power it should be appreciated that arrive, with The energy storing device 810 used in figure 8 above illustrated embodiment can be widely applied to can be used in promoting having of vehicle Any dynamical system of one or more motors.The example of motor vehicle driven by mixed power can include but not limited to plug-in hybrid Vehicle, double mode motor vehicle driven by mixed power, full motor vehicle driven by mixed power, extended-range motor vehicle driven by mixed power, power-assisted hybrid electric vehicle , light hybrid vehicle, serial mixed power vehicle, parallel hybrid vehicles, series-parallel hybrid power Vehicle, fluid power motor vehicle driven by mixed power, power dividing type motor vehicle driven by mixed power and the motor vehicle driven by mixed power of any other type.This Vehicle in Gong Kai can be configured to car, motor type car, truck, bus, commercial car, transboundary car, recreation vehicle etc., should When being understood by, the technology of the disclosure is not limited to a certain certain types of vehicle.

It will be appreciated that be taken in it is said parts " are connected ", " coupling " or " access " arrive another parts time, it can be direct Connect or couple or be linked into another parts, it is also possible to there is the intermediate member in addition to described connector 210.

Example above primarily illustrates the voltage monitoring device of battery modules of the present utility model, the integrated electricity of monitoring voltage Road, voltage monitoring method and use voltage monitoring device of the present utility model or the vehicle of monitoring voltage integrated circuit.Although Only embodiment of the present utility model to some of them is described, but those of ordinary skill in the art it is to be appreciated that this Utility model can be implementing with other forms many with in scope without departing from its spirit, and such as, each voltage monitoring is integrated The change of the battery modules quantity that circuit gathered or monitored.Therefore, the example shown and embodiment are considered schematic And nonrestrictive, in the case of without departing from this utility model spirit and scope as defined in appended claims, This utility model may contain various amendments and replacement.

Claims

1. a voltage monitoring device for battery modules, for being in charge and discharge in the most N number of battery modules being connected in series The each monitoring voltage that carries out in M battery unit in electricity loop, wherein, battery modules and i+1 described in adjacent i-th Being provided with the connector with the first resistance value between individual described battery modules, N is the integer more than or equal to 2,1≤i≤(N- 1), M is the integer more than N；

Wherein, described voltage monitoring device includes:

Monitoring voltage integrated circuit, it is configured with the first collection terminal and the second collection terminal, and described first collection terminal and second is adopted Collection end bridges each described connector arbitrary described battery unit adjacent with the two ends of this connector to form this battery unit Voltage acquisition circuit；And

First compensating module, it is configured to based on the first sample rate current in the described charging and discharging circuit acquired and described First resistance value of connector is calculated the first compensation voltage；

Wherein, described voltage monitoring device is configured to described first collection terminal based on described monitoring voltage integrated circuit acquisition And second the magnitude of voltage and the most described first between collection terminal compensate voltage and be calculated described first collection terminal and second The monitoring voltage value of the battery unit of collection terminal correspondence bridging.

2. voltage monitoring device as claimed in claim 1, wherein, also includes: the first current acquisition parts, and it is configured to adopt Collect the electric current of described charging and discharging circuit as described first sample rate current.

3. voltage monitoring device as claimed in claim 2, wherein, described first current acquisition parts and/or first compensate mould Block is configured in battery management system.

4. voltage monitoring device as claimed in claim 2, wherein, described first current acquisition parts and/or first compensate mould Block is configured in described monitoring voltage integrated circuit.

5. voltage monitoring device as claimed in claim 1, wherein, also includes:

Second current acquisition parts, its balanced discharge loop being configured to gather each battery unit being in balanced discharge process Electric current as the second sample rate current；And

Second compensating module, it is configured to be calculated the second voltage based on described second sample rate current and the second resistance value and mends Repaying value, wherein said second resistance value is balanced discharge loop and this battery unit of each battery unit of balanced discharge process The resistance value of multiplexing part of voltage acquisition circuit of adjacent any battery unit；

Wherein, described voltage monitoring device is also structured to balanced discharge process based on described monitoring voltage integrated circuit acquisition The magnitude of voltage and the most described second of the adjacent any battery unit of each battery unit compensate voltage and be calculated all The monitoring voltage value of the adjacent any battery unit of each battery unit of weighing apparatus discharge process.

6. voltage monitoring device as claimed in claim 5, wherein, described second compensating module is also structured to based on described the Two sample rate currents and the 3rd resistance value are calculated tertiary voltage offset, and wherein said 3rd resistance value is balanced discharge process The electricity of multiplexing part of self corresponding voltage acquisition circuit of balanced discharge loop and this battery unit of each battery unit Resistance；

Wherein, described voltage monitoring device is also structured to balanced discharge process based on described monitoring voltage integrated circuit acquisition The magnitude of voltage and the most described 3rd of each battery unit compensate voltage and calculate and be equalized each battery of discharge process The monitoring voltage value of unit.

7. the voltage monitoring device as described in claim 5 or 6, wherein, described multiplexing part be described balanced discharge loop and The sampling line of corresponding described voltage acquisition circuit multiplexing, this sampling line connects described monitoring voltage integrated circuit and described battery mould Group.

8. the voltage monitoring device as described in claim 5 or 6, wherein, described second current acquisition parts and/or second compensate Module is configured in battery management system.

9. the voltage monitoring device as described in claim 5 or 6, wherein, described second current acquisition parts and/or second compensate Module is configured in described monitoring voltage integrated circuit.

10. voltage monitoring device as claimed in claim 1, wherein, also includes for putting described monitoring voltage integrated circuit Monitoring units circuit socket and be connected to one or more element circuit extension sockets of described monitoring units circuit socket.

11. voltage monitoring devices as claimed in claim 10, wherein, described monitoring units circuit socket is 1, described unit Circuit extension socket is N-1, and 1 described monitoring voltage integrated circuit and N-1 described element circuit extension socket are the most right The battery modules that should N number of be connected in series is arranged, 1 described monitoring voltage integrated circuit is disposed in the position of opposite central.

12. 1 kinds of vehicles, it includes energy storing device, is provided with multiple battery being connected in series in described energy storing device Module and the voltage monitoring device as according to any one of claim 1 to 11.

13. vehicles as claimed in claim 12, wherein, described vehicle is electric vehicle or motor vehicle driven by mixed power.