The content of the invention
A technical problem to be solved of the embodiment of the present invention is:A kind of data transmission and processing side is provided
Method, battery detection unit and battery management system, to solve prior art CAN momentary load rate
Technical problem that is too high, causing CAN congestion.
One side according to embodiments of the present invention there is provided a kind of data transmission processing method, including:
Each battery detection unit in battery management system is in synchronizing cycle T, synchronous acquisition battery parameter
Information;
Each battery detection unit in battery management system respectively difference in the T synchronizing cycle when
Carve, the battery parameter information collected by controller local area network's CAN transmission.
In based on another of above method embodiment, each battery detection unit is respectively described same
In step period T not in the same time, transmitting the battery parameter information collected by CAN includes:
Each battery detection unit i obtains the delivery time Ti in each comfortable T synchronizing cycle respectively, and
Whether monitoring current time reaches delivery time Ti;Wherein, battery management system includes N number of battery detecting
Unit, N is the integer more than 1;I be numbering of the battery detection unit in battery management system, i according to
Secondary value is【1, N】In integer;
Delivery time Ti is reached in response to current time, battery detection unit i should by CAN transmission
The battery parameter information that battery detection unit i is collected.
In based on another of above method embodiment, the battery detection unit i obtains delivery time
Ti includes:
Battery detection unit i obtains delivery time Ti by Ti=T0+Ts+ Δs T* (i-1);
Wherein, T0 is the synchronization point of T synchronizing cycle, when Ts is the collection of battery parameter information
Long, Δ T is that information sends interval duration, and Ts and Δ T value is respectively greater than 0, and meet T >=
Ts+N*ΔT。
In based on another of above method embodiment, each battery detection unit is in T synchronizing cycle
Interior, synchronous acquisition battery parameter information includes:
Each battery detection unit starts simultaneously at collection battery ginseng in T synchronizing cycle synchronization point T0
Number information.
In based on another of above method embodiment, each battery detection unit receives battery management
The synchronizing signal that battery control unit is sent in system, and will receive the synchronization point of synchronizing signal as
Synchronization point T0 starts timing, starts simultaneously at the operation for performing the collection battery parameter information.
In based on another of above method embodiment, it is single that the battery detection unit receives battery control
The synchronizing signal that member is sent includes:
Battery detection unit receives the synchronization that battery control unit is sent by hardwired fashion or CAN
Signal.
In based on another of above method embodiment, in addition to:Battery detection unit electrifying startup,
The working condition mark of battery detection unit is set to original state, and started according to default effective time
It is monitored for monitoring cycle T m;
Synchronizing signal in response to receiving battery control unit transmission in monitoring cycle T m, by work
Status indicator keeps or switched to normal condition;
Otherwise, will if not receiving the synchronizing signal of battery control unit transmission in monitoring cycle T m
Working condition mark keeps or switched to error condition.
In based on another of above method embodiment, in addition to:
Each battery detection unit recognizes respective working condition mark respectively;
If working condition is designated original state or normal condition, each battery detection unit is performed same
In step period T, the operation of synchronous acquisition battery parameter information;
If working condition is designated error condition, using predetermined interval duration Td as the cycle, collection battery ginseng
Number information simultaneously transmits the battery parameter information collected by CAN.
In based on another of above method embodiment, in addition to:
Each battery detection unit respectively more new record the last time collection battery parameter information at the time of Tx and
Ty at the time of the last time transmission battery parameter information;
It is described using predetermined interval duration Td as the cycle, collection battery parameter information simultaneously passed by CAN
The defeated battery parameter information collected includes:
Whether monitoring current time reaches collection moment Tc=Tx+Td;
Collection moment Tc is reached in response to current time, starts to gather battery parameter information;And
Whether monitoring current time reaches delivery time Tj=Tx+Td;
Delivery time Tj is reached in response to current time, battery detection unit i is transmitted by CAN
The battery parameter information collected.
In based on another of above method embodiment, Td >=T.
Other side according to embodiments of the present invention there is provided a kind of battery detection unit, including:
Collecting unit, in synchronizing cycle T, being examined with other batteries in the battery management system of place
Survey unit synchronous acquisition battery parameter information;
Acquiring unit, for obtaining delivery time of the battery detection unit in T synchronizing cycle
Ti;
Monitoring unit, for monitoring whether current time reaches delivery time Ti;
Transmitting element, for the monitoring result according to monitoring unit, when reaching transmission in response to current time
Ti, the delivery time Ti in T synchronizing cycle are carved, passes through controller local area network's CAN
Transmit the battery parameter information collected;
Wherein, battery management system includes each in N number of battery detection unit, N number of battery detection unit
Delivery time Tis of the battery detection unit i in T synchronizing cycle is different;Wherein, N is more than 1
Integer;I is numbering of the battery detection unit in battery management system, and value is i successively【1, N】
In integer.
In another embodiment based on above-mentioned battery detection unit, the acquiring unit, specifically for
By Ti=T0+Ts+ Δs T* (i-1), delivery time Ti is obtained;
Wherein, T0 is the synchronization point of T synchronizing cycle, when Ts is the collection of battery parameter information
Long, Δ T is that information sends interval duration, and Ts and Δ T value is respectively greater than 0, and meet T >=
Ts+N*ΔT。
In another embodiment based on above-mentioned battery detection unit, the collecting unit, specifically for
In T synchronizing cycle synchronization point T0, collection battery parameter information is started simultaneously at.
In another embodiment based on above-mentioned battery detection unit, in addition to:
The synchronous letter that battery control unit is sent in receiving unit, battery management system where for receiving
Number, and the synchronization point for receiving synchronizing signal is started to count as synchronization point T0 instruction timing units
When, while indicating collecting unit collection battery parameter information.
In another embodiment based on above-mentioned battery detection unit, the receiving unit, especially by
Hardwired fashion or CAN are connected with the battery control unit, single specifically for receiving battery control
The synchronizing signal that member is sent by hardwired fashion or CAN.
In another embodiment based on above-mentioned battery detection unit, in addition to state managing unit, use
In:
After the battery detection unit electrifying startup, the working condition of the battery detection unit is identified
Original state is set to, and starts to be monitored for monitoring cycle T m according to default effective time;
Synchronizing signal in response to receiving battery control unit transmission in monitoring cycle T m, by work
Status indicator keeps or switched to normal condition;
Otherwise, will if not receiving the synchronizing signal of battery control unit transmission in monitoring cycle T m
Working condition mark keeps or switched to error condition.
In another embodiment based on above-mentioned battery detection unit, in addition to:Recognition unit, is used
In:
Recognize the working condition mark of the battery detection unit;And
If working condition is designated original state or normal condition, indicate the collecting unit in synchronizing cycle
In T, with other battery detection unit synchronous acquisition battery parameter information in the battery management system of place
Operation;
If working condition is designated error condition, indicate the collecting unit using predetermined interval duration Td as
In the cycle, battery parameter information is gathered, so that the transmitting element leads to by the cycle of predetermined interval duration Td
Cross the battery parameter information that CAN transmission is collected.
In another embodiment based on above-mentioned battery detection unit, in addition to:
Recording unit, for respectively more new record collecting unit the last time collection battery parameter information when
Ty at the time of carving Tx and transmitting element the last time transmission battery parameter information;
The monitoring unit, is additionally operable to:
Whether monitoring current time reaches collection moment Tc=Tx+Td;
Collection moment Tc is reached in response to current time, collecting unit collection battery parameter information is indicated;With
And
Whether monitoring current time reaches delivery time Tj=Tx+Td;
Delivery time Tj is reached in response to current time, indicates that transmitting element should by CAN transmission
The battery parameter information that battery detection unit i is collected.
In another embodiment based on above-mentioned battery detection unit, Td >=T.
Another aspect according to embodiments of the present invention there is provided a kind of battery management system, an including electricity
Pond control unit and connected respectively by controller local area network's CAN with the battery control unit
The N number of battery detection unit connect, N is the integer more than 1;
Each battery detection unit in N number of battery detection unit, is respectively used in T synchronizing cycle
It is interior, synchronous acquisition battery parameter information;And respectively in T synchronizing cycle not in the same time, lead to
Cross CAN and think the battery parameter information that the battery control unit transmission is collected.
In another embodiment based on above-mentioned battery management system, the battery detection unit is specially
The battery detection unit of above-mentioned any one.
Based on data transmission processing method provided in an embodiment of the present invention, battery detection unit and battery management
Each battery detection unit in system, battery management system synchronous acquisition battery parameter in synchronizing cycle T
Information, and respectively in synchronizing cycle T not in the same time, the electricity collected is transmitted by CAN
Pond parameter information.Thus, the embodiment of the present invention realizes in BMS battery between each BMU and BCU
The transmission of staggering the time of parameter information, reduce in CAN maximum instantaneous data message transmission quantity and
The maximum instantaneous load factor of CAN, it is to avoid the quantity of instantaneous transfer data message in CAN
Excessive, momentary load rate is too high to cause CAN congestion, the technology so as to cause data message loss
Problem.
Embodiment
With reference to Figure of description, to a kind of CAN transmission method provided in an embodiment of the present invention
Embodiment illustrate.
Fig. 1 is the flow chart of one embodiment of data transmission processing method of the present invention.As shown in figure 1,
The data transmission processing method of the embodiment of the present invention includes:
Each BMU in 101, BMS is in synchronizing cycle T, the battery parameter of synchronous acquisition battery pack
Information, for example:Voltage, temperature, state of battery etc..
Each BMU in 102, BMS respectively in synchronizing cycle T not in the same time, pass through CAN
Bus, the battery parameter information collected is transmitted to BCU.
Based on data transmission processing method provided in an embodiment of the present invention, each BMU in BMS is in synchronization
Synchronous acquisition battery parameter information in cycle T, and respectively in synchronizing cycle T not in the same time, pass through
The battery parameter information that CAN transmission is collected.Thus, the embodiment of the present invention is realized in BMS
The transmission of staggering the time of battery parameter information between each BMU and BCU, reduces maximum wink in CAN
When data message transmission quantity and CAN maximum instantaneous load factor, it is to avoid wink in CAN
When data message transmission quantity is excessive, momentary load rate is too high causes CAN congestion, so as to leading
The technical problem for causing data message to lose.
In a specific example of above-mentioned data transmission processing method embodiment, operation 102 specifically can be with
Realize in the following way:Each BMUi obtains the delivery time Ti in each comfortable T synchronizing cycle respectively,
And monitor whether current time reaches delivery time Ti;Wherein, BMS includes N number of BMU, and N is big
In 1 integer;I is numberings of the BMU in BMS, and value is i successively【1, N】In it is whole
Number;Reaching delivery time Ti, BMUi in response to current time should to BCU transmission by CAN
The battery parameter information that battery detection unit i is collected.
Fig. 2 is the flow chart of another embodiment of data transmission processing method of the present invention.As shown in Fig. 2
The data transmission processing method of the embodiment of the present invention, including:
Each BMUi in 201, BMS is in synchronizing cycle T, the battery parameter of synchronous acquisition battery pack
Information, for example:Voltage, temperature, state of battery etc..
Exemplarily, each BMUi can T synchronizing cycle synchronization point T0, start simultaneously at collection electricity
The battery parameter information of pond group.Wherein, T0 is T synchronizing cycle synchronization point.
Each BMUi in 202, BMS is performed respectively:When obtaining the transmission in each comfortable T synchronizing cycle
Carve Ti.
Exemplarily, BMUi can obtain its delivery time by Ti=T0+Ts+ Δs T* (i-1)
Ti.Wherein, Ts is the collection duration of battery parameter information, i.e.,:Collection battery parameter information is taken
Long, Δ T is that the information between adjacent BMU sends interval duration, and Ts and Δ T value are respectively greater than
0, and meet T >=Ts+N* Δs T.
203, whether monitoring current time reaches delivery time Ti.
If current time reaches delivery time Ti, operation 204 is performed.Otherwise, the operation is continued executing with
203。
204, the battery parameter information collected is transmitted to BCU by CAN.
Specifically, what BMUi was sent at the Ti moment is the last battery parameter information collected, tool
Body can be that the synchronization point T0 in current sync cycle T or in upper synchronizing cycle T starts collection
Battery parameter information.In data transmission processing method embodiment shown in Fig. 2, Ts value can root
Set according to demand, can specifically be less than or equal to T synchronizing cycle duration.In a specific example,
Ts value can be equal with Δ T value, i.e.,:The collection duration of battery parameter information and BMU it
Between information send interval duration value it is equal.In addition, for collection duration is longer and synchronizing cycle
T and shorter situation, Ts value can be T synchronizing cycle duration, and now, BMUi is in Ti
Carve transmission is probably the battery parameter information for starting collection within upper one synchronous same period T.
As shown in figure 3, during for one of the data transmission and processing of the specific example in embodiment illustrated in fig. 2
Sequence figure.In Fig. 3, all time is divided into countless T synchronizing cycle, each T synchronizing cycle
Data transmission and processing operation is as follows:
All BMU1~N in T synchronizing cycle synchronization point T0, BMS start synchronous acquisition electricity
The battery parameter information of pond group;
BMU1~N obtains respective delivery time Ti, and monitor current respectively by Ti=T0+ Δ T*i
Whether the moment reaches delivery time Ti;
(value is Δ to collection duration Ts from the T0 moment by battery parameter information in the embodiment
T), due in T1=T0+ Δs T, BMU1 is by the battery parameter Information encapsulation collected to datagram
Wen Zhong, BCU is sent to by CAN;
Information is again passed by from the T1 moment and sends interval duration Δ T, due in T2, BMU2 will
The battery parameter Information encapsulation collected is sent to BCU into data message by CAN;
Information is again passed by from the T2 moment and sends interval duration Δ T, due in T3, BMU3 will
The battery parameter Information encapsulation collected is sent to BCU into data message by CAN;
By that analogy, due in TN, BMUN are by the battery parameter Information encapsulation collected to data
In message, BCU is sent to by CAN.
Based on it is above-mentioned should example, all BMU1~N synchronization point T0 start synchronous acquisition battery ginseng
Number information, each BMUi is sent to BCU by CAN at the Ti=T0+ Δ T*i moment and is packaged with battery
The data message of parameter information.
Further, in another embodiment based on above-mentioned data transmission processing method of the invention, also
It can include:
BCU in each BMU receptions BMS, the mode such as by hardwired fashion or CAN,
The synchronizing signal of transmission, and the synchronization point for receiving the synchronizing signal is started as synchronization point T0
Timing, to start simultaneously at the operation for performing above-mentioned collection battery parameter information.
Specifically, each BMU method of synchronization has a variety of in BMS, for example, can exemplarily pass through
The following two kinds mode is synchronous:
Mode one, rigid line is synchronous.BCU is connected respectively to all BMU1~N by rigid line, and BCU leads to
Cross rigid line and send synchronizing signal to BMU1~N, the effective means for the synchronizing signal that can make an appointment is that edge has
Effect, such as rising edge or trailing edge effectively, then BMU1~N monitor effectively along when record current time be
Synchronization point T0.
Mode two, CAN message is synchronous.BCU is sent out to BMU1~N respectively by CAN
A certain specific CAN message (such as CAN ID are the CAN message of particular value) is sent as synchronous letter
Number, when BMU1~N receives the CAN message that CAN ID are particular value, record current time is same
Walk moment T0.
Fig. 4 is the flow chart of another embodiment of data transmission processing method of the present invention.As shown in figure 4,
Compared with the data transmission processing method of the various embodiments described above of the present invention, the data transfer of the embodiment of the present invention
Processing method also includes the following operation that each BMU is performed respectively:
401, BMU electrifying startups, original state is set to by this BMU working condition mark, and
Start to be monitored for monitoring cycle T m according to default effective time.
Working condition therein identifies the working condition for identifying BMU.Exemplarily, BMU work
Three kinds of original state, normal condition and error condition can be had by making state.
402, judge the synchronizing signal of BCU transmissions whether is received in monitoring cycle T m.
If whether receiving the synchronizing signal of BCU transmissions in monitoring cycle T m, operation is performed
403.Otherwise, if not receiving the synchronizing signal of BCU transmissions in monitoring cycle T m, behaviour is performed
Make 404.
Wherein, Tm value for example can be 0.5~1.5 times of T synchronizing cycle.
403, this BMU working condition mark is kept or switched to normal condition.
Specifically, if this BMU working condition mark is at present normal condition, this need to only kept just
Normal state, without carrying out state switching again;Otherwise, if this BMU working condition mark mesh
Preceding is other working conditions beyond normal condition, then switches to this BMU working condition mark just
Normal state.
Afterwards, the follow-up process of the present embodiment is not performed.Or, in a further embodiment, Ke Yixuan
Perform to selecting property operation 405.
404, working condition is identified and keeps or switch to error condition.
Specifically, if this BMU working condition mark is at present error condition, the mistake need to only be kept
The state of mistake, without carrying out state switching again;Otherwise, if this BMU working condition mark mesh
Preceding is other working conditions beyond error condition, then this BMU working condition mark is switched into mistake
The state of mistake.
Afterwards, the follow-up process of the present embodiment is not performed.Or, in a further embodiment, Ke Yixuan
Perform to selecting property operation 405.
405, BMU recognize respective working condition mark respectively.
If working condition is designated original state or normal condition, each BMU is performed in T synchronizing cycle
It is interior, the operation of synchronous acquisition battery parameter information, i.e.,:Start the operation of execution 101,201 or 301.
If working condition is designated error condition, operation 406 is performed.
406, using predetermined interval duration Td as the cycle, gather battery parameter information and pass through CAN
Transmit the battery parameter information collected.
Exemplarily, Td >=T.In concrete application, Td value can be T synchronizing cycle value or 2
Times synchronizing cycle T or other integral multiples T values synchronizing cycle.
Based on data transmission processing method provided in an embodiment of the present invention, because each BMU is when specific
Carve send battery parameter information, even in a certain BMU working condition mistake (i.e.:BMU failures)
When, still ensure that failure BMU periodically gathers and sent battery parameter information in particular moment, due to
Other BMU send battery parameter information different at the time of, still ensure that staggering the time for battery parameter information
Send, it is to avoid the problem of common CAN momentary load rate is too high in BMS.
Fig. 5 is the flow chart of data transmission processing method further embodiment of the present invention.As shown in figure 5,
The data transmission processing method of the embodiment of the present invention includes:
Each BMUi electrifying startups in 501, BMS, this BMUi working condition mark is set to
Original state, and start to be monitored for monitoring cycle T m according to default effective time.
Working condition therein identifies the working condition for identifying BMU.Exemplarily, BMU work
Three kinds of original state, normal condition and error condition can be had by making state.
502, BMUi judge the synchronous letter of BCU transmissions whether is received in monitoring cycle T m respectively
Number.
If whether receiving the synchronizing signal of BCU transmissions in monitoring cycle T m, operation is performed
503.Otherwise, if not receiving the synchronizing signal of BCU transmissions in monitoring cycle T m, behaviour is performed
Make 504.
503, this BMUi working condition mark is kept or switched to normal condition.
Specifically, if this BMUi working condition mark is at present normal condition, this need to only kept just
Normal state, without carrying out state switching again;Otherwise, if this BMUi working condition mark mesh
Preceding is other working conditions beyond normal condition, then switches to this BMUi working condition mark just
Normal state.
Afterwards, the follow-up process of the present embodiment is not performed.Or, in a further embodiment, Ke Yixuan
Perform to selecting property operation 505.
504, working condition is identified and keeps or switch to error condition.
Specifically, if this BMUi working condition mark is at present error condition, the mistake need to only be kept
The state of mistake, without carrying out state switching again;Otherwise, if this BMUi working condition mark mesh
Preceding is other working conditions beyond error condition, then this BMUi working condition mark is switched into mistake
The state of mistake.
Afterwards, the follow-up process of the present embodiment is not performed.Or, in a further embodiment, Ke Yixuan
Perform to selecting property operation 505.
505, BMUi recognize respective working condition mark respectively.
If working condition is designated original state or normal condition, operation 506 is performed;Otherwise, if work
Status indicator is error condition, performs operation 510.
The synchronization point T0 of each BMUi in 506, BMS in synchronizing cycle T, synchronous acquisition battery
The battery parameter information of group, for example:Voltage, temperature, state of battery etc., and record or more new record
Tx at the time of the last time collection battery parameter information.
507, BMUi obtain the delivery time Ti in each comfortable T synchronizing cycle respectively.
508, BMUi monitor whether current time reaches delivery time Ti respectively.
If current time reaches delivery time Ti, operation 509 is performed.Otherwise, the operation is continued executing with
508。
509, BMUi transmit the battery parameter information collected by CAN to BCU, and record
Or Ty at the time of more new record the last time transmission battery parameter information.
Whether 510, BMUi monitoring current times reached collection moment Tc=Tx+Td.
Collection moment Tc is reached in response to current time, operation 511 is performed.Otherwise, operation is continued executing with
510。
511, start to gather battery parameter information, and record or more new record the last time collection battery parameter
Tx at the time of information.
512, whether monitoring current time reaches delivery time Tj=Tx+Td.
Delivery time Tj is reached in response to current time, operation 513 is performed.Otherwise, operation is continued executing with
512。
513, the battery parameter information that the BMUi is collected is transmitted by CAN, and record or more
Ty at the time of new record the last time transmission battery parameter information.
Fig. 6 is the structural representation of BMS one embodiment of the present invention.The BMS of embodiment illustrated in fig. 6
Available for the data transmission processing method for realizing any of the above-described embodiment of the invention.As shown in fig. 6, this hair
The BMS of bright embodiment include a BCU and respectively with BCU by CAN be connected it is N number of
BMU, wherein, N is the integer more than 1.
Wherein, each BMU, is respectively used in synchronizing cycle T, synchronous acquisition battery parameter information,
For example:The data such as voltage, temperature, the state of battery;And respectively difference in synchronizing cycle T when
Carve, the battery parameter information collected is transmitted to BCU by CAN, so that BCU is to battery
Each battery carries out Balance route in group.
BCU, the battery parameter information for being transmitted according to each BMU carries out equal to each battery in battery pack
Weighing apparatus control.
Based on BMS provided in an embodiment of the present invention, wherein each BMU is synchronously adopted in synchronizing cycle in T
Set battery parameter information, and respectively in synchronizing cycle T not in the same time, transmitted by CAN
The battery parameter information collected.Thus, the embodiment of the present invention realize in BMS each BMU with
The transmission of staggering the time of battery parameter information between BCU, reduces maximum instantaneous in CAN and transmits data
The maximum instantaneous load factor of message amount and CAN, it is to avoid instantaneous transfer data in CAN
The quantity of message is excessive, momentary load rate is too high causes CAN congestion, so as to causing data message
The technical problem of loss.
Fig. 7 is the structural representation of BMU one embodiment of the present invention.The BMU of embodiment illustrated in fig. 7
Available for the BMU in embodiment illustrated in fig. 6, any of the above-described embodiment data transmission and processing of the invention is realized
BMU functions in method.As shown in fig. 7, the BMU of the embodiment of the present invention includes:
Collecting unit, in synchronizing cycle T, with other BMU synchronous acquisitions in the BMS of place
Battery parameter information.
Exemplarily, collecting unit, is particularly used in the synchronization point T0 in T synchronizing cycle, opens simultaneously
Begin collection battery parameter information.
Acquiring unit, for obtaining delivery time Tis of this BMU in synchronizing cycle T.
Exemplarily, acquiring unit, is particularly used in by Ti=T0+Ts+ Δs T* (i-1), obtains hair
Send moment Ti.Wherein, T0 is the synchronization point of T synchronizing cycle, and Ts is battery parameter information
Duration is gathered, Δ T is that information sends interval duration, and Ts and Δ T value is respectively greater than 0, and meets T
≥Ts+N*ΔT.In a particular application, Ts value can be set according to demand, can be specifically less than
Or equal to T synchronizing cycle duration.In a specific example, the value that Ts value can be with Δ T
It is equal, i.e.,:Information between collection duration and the BMU of battery parameter information sends taking for interval duration
Value is equal.In addition, for gather duration it is longer and in the case of synchronizing cycle, T was shorter, Ts value
Can be T synchronizing cycle duration, now, what BMUi was sent at the Ti moment is probably synchronous upper one
Start the battery parameter information of collection in same period T.
Monitoring unit, for monitoring whether current time reaches delivery time Ti.
Transmitting element, for the monitoring result according to monitoring unit, when reaching transmission in response to current time
Ti is carved, the delivery time Ti in synchronizing cycle T is transmitted the battery collected by CAN and joined
Number information.
Specifically, what what transmitting element was sent can be that BMUi where it sends at the Ti moment is nearest
The battery parameter information once collected, can be specifically in current sync cycle T or a upper synchronous week
Synchronization point T0 in phase T starts the battery parameter information of collection.
Wherein, BMS includes N number of BMU, and each BMUi in N number of BMU is in synchronizing cycle T
Delivery time Ti it is different;Wherein, N is the integer more than 1;I is volumes of the BMU in BMS
Number, value is i successively【1, N】In integer.
, can be in synchronous acquisition battery ginseng in synchronizing cycle T based on BMU provided in an embodiment of the present invention
Number information, and respectively in synchronizing cycle T not in the same time, transmit what is collected by CAN
Battery parameter information.Thus, the embodiment of the present invention realizes electric between each BMU and BCU in BMS
The transmission of staggering the time of pond parameter information, reduce in CAN maximum instantaneous data message transmission quantity and
The maximum instantaneous load factor of CAN, it is to avoid the quantity of instantaneous transfer data message in CAN
Excessive, momentary load rate is too high to cause CAN congestion, the technology so as to cause data message loss
Problem.
Fig. 8 is the structural representation of another embodiment of BMU of the present invention.As shown in figure 8, and Fig. 7
Shown embodiment is compared, and the BMU of the embodiment of the present invention also includes receiving unit, where receiving
The synchronizing signal that BCU is sent in BMS, and will receive the synchronization point of synchronizing signal as it is synchronous when
Carve T0 and indicate that timing unit starts timing, while indicating collecting unit collection battery parameter information.
Specifically, receiving unit can specifically be controlled by hardwired fashion or CAN with the battery
Unit is connected, specifically for receive battery control unit by hardwired fashion or CAN send it is same
Walk signal.
In addition, referring back to Fig. 8, in BMU of the present invention another embodiment, state can also be included
Administrative unit, for after this BMU electrifying startups, this BMU working condition mark to be set to just
Beginning state, and start to be monitored for monitoring cycle T m according to default effective time;In response in monitoring
The synchronizing signal of BCU transmissions is received in cycle T m, working condition is identified and keeps or switches to normally
State;Otherwise, if the synchronizing signal of BCU transmissions is not received in monitoring cycle T m, by work shape
State mark keeps or switched to error condition.
Further, referring back to Fig. 8, in BMU of the present invention further embodiment, it can also include
Recognition unit, for recognizing that BMU working conditions are identified;If working condition is designated original state or just
Normal state, indicates collecting unit in synchronizing cycle T, with other BMU in the BMS of place synchronously adopt
The operation of set battery parameter information;If working condition is designated error condition, indicate collecting unit with default
It is the cycle to be spaced duration Td, battery parameter information is gathered, so that transmitting element is with predetermined interval duration Td
The battery parameter information collected is transmitted by CAN for the cycle.
Exemplarily, Td >=T.In concrete application, Td value can be T synchronizing cycle value or 2
Times synchronizing cycle T or other integral multiples T values synchronizing cycle.
Based on BMU provided in an embodiment of the present invention, because each BMU sends battery ginseng in particular moment
Number information, even in a certain BMU working condition mistake (i.e.:BMU failures) when, still ensure that
Failure BMU is periodically gathered in particular moment and is sent battery parameter information, because other BMU are not
With at the time of send battery parameter information, still ensure that the transmission of staggering the time of battery parameter information, it is to avoid
The problem of common CAN momentary load rate is too high in BMS.
Fig. 9 is the structural representation of another embodiment of BMU of the present invention.As shown in figure 9, and Fig. 8
Shown embodiment is compared, and the BMU of the embodiment of the present invention also includes recording unit, for updating respectively
Tx and transmitting element the last time pass at the time of recording collecting unit the last time collection battery parameter information
Ty at the time of transmission of electricity pond parameter information.Correspondingly, in the embodiment, monitoring unit can be additionally used in:Monitoring
Whether current time reaches collection moment Tc=Tx+Td;Collection moment Tc is reached in response to current time,
Indicate collecting unit collection battery parameter information;And whether monitoring current time reaches delivery time
Tj=Tx+Td;Delivery time Tj is reached in response to current time, indicates that transmitting element passes through CAN
Transmit the battery parameter information that battery detection unit i is collected.
The embodiment of each in this specification is described by the way of progressive, what each embodiment was stressed
All it is same or analogous part cross-reference between the difference with other embodiments, each embodiment
.For system embodiment, because it is substantially corresponding with embodiment of the method, so the ratio of description
Relatively simple, the relevent part can refer to the partial explaination of embodiments of method.
The methods, devices and systems of the present invention may be achieved in many ways.For example, can be by soft
Part, hardware, firmware or software, hardware, firmware any combinations come realize the present invention method, dress
Put and system.The said sequence of the step of for method merely to illustrate, method of the invention
Step is not limited to order described in detail above, unless specifically stated otherwise.In addition, at some
In embodiment, the present invention can be also embodied as recording to program in the recording medium, these programs include using
In the machine readable instructions for realizing the method according to the invention.Thus, the present invention also covering storage is used to hold
The recording medium of the program of row the method according to the invention.