KR20170062757A - Method for recognizing master bms and slave bms of system contains multiple battery packs - Google Patents
Method for recognizing master bms and slave bms of system contains multiple battery packs Download PDFInfo
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- KR20170062757A KR20170062757A KR1020150168326A KR20150168326A KR20170062757A KR 20170062757 A KR20170062757 A KR 20170062757A KR 1020150168326 A KR1020150168326 A KR 1020150168326A KR 20150168326 A KR20150168326 A KR 20150168326A KR 20170062757 A KR20170062757 A KR 20170062757A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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Abstract
The present invention includes an automatic recognition necessity determining step of determining whether each BMS of a plurality of battery packs needs to perform an automatic recognition step of automatically recognizing a master BMS and a slave BMS; A first automatic recognition step where each BMS decides its own position information to the master BMS or the slave BMS when it is determined that automatic recognition is necessary through the automatic recognition necessity determination step; A second automatic recognition step in which each BMS checks the position information that is determined in the first automatic recognition step and the master BMS designates the number of the slave BMS; A third automatic recognition step of completing the automatic recognition step; And a normal mode operation step in which each BMS operates in a normal mode; A master BMS and a slave BMS recognition method of a plurality of battery pack systems.
Description
The present invention relates to a method of recognizing a master BMS and a slave BMS in a plurality of battery pack systems. More particularly, the present invention relates to communication between battery packs without adding a separate hardware configuration to a plurality of battery pack systems, And more particularly to a master BMS and a slave BMS recognition method for a plurality of battery pack systems capable of automatically recognizing a master BMS and a slave BMS.
Recently, research and development on secondary batteries have been actively conducted. Here, the secondary battery is a battery that can be charged and discharged, and includes both conventional Ni / Cd batteries, Ni / MH batteries, and the recent lithium ion batteries. Among the secondary batteries, the lithium ion battery has a merit that the energy density is much higher than that of the conventional Ni / Cd battery and the Ni / MH battery. Moreover, the lithium ion battery can be manufactured in a small size and tendency, . In addition, the lithium ion battery has been attracting attention as a next generation energy storage medium by expanding its use range as an electric vehicle power source.
On the other hand, a system composed of a plurality of battery packs includes a master BMS and a plurality of slave BMS rolls. Here, the master BMS communicates with the host system and controls the operation of a plurality of slave BMSs.
Recognition technologies between a master BMS based on a hardware configuration and a recognition technique between a plurality of slave BMSs based on recognition technology or a software configuration between a master BMS and a plurality of slave BMSs are used as recognition technologies between a conventional master BMS and a plurality of slave BMSs .
In the recognition technology between the master BMS and the plurality of slave BMSs based on the conventional hardware configuration, the MCU of each BMS recognizes a master BMS and a plurality of slave BMSs by designing a plurality of switches or constructing separate optional resistors. The recognition technology between the master BMS and the slave BMS based on the hardware configuration increases the production cost of the BMS in proportion to the configuration of the hardware and it is difficult to cause the operation error of the BMS product itself when setting the wrong hardware by the user have.
The recognition technique between the master BMS and the plurality of slave BMSs based on the conventional hardware configuration is such that the two BMSs exchange their serial numbers through communication and compare the priority between the received serial numbers and their own serial numbers The master BMS and the slave BMS. That is, the two BMSs select only the master BMS through a simple comparison of the serial numbers, and then consider the remaining BMSs as slave BMSs. In the case of a system in which two or more BMSs are configured in parallel, an error may occur in the recognition process between the master BMS and the plurality of slave BMSs.
Therefore, in a system in which two or more BMSs are configured in parallel, it is required to develop a master BMS and a slave BMS recognition technology of a plurality of new battery pack systems that can be recognized between a master BMS and a slave BMS without adding a separate hardware configuration .
The present invention provides a master BMS and a slave BMS recognition method for a plurality of new battery pack systems that can be recognized between a master BMS and a slave BMS in a system in which two or more BMSs are configured in parallel without adding a separate hardware configuration.
The master BMS and the slave BMS recognition method of a plurality of battery pack systems according to an embodiment of the present invention may include a step of determining whether each BMS of a plurality of battery packs needs to perform an automatic recognition step of automatically recognizing a master BMS and a slave BMS An automatic recognition necessity determining step of determining an automatic recognition necessity step; A first automatic recognition step where each BMS decides its own position information to the master BMS or the slave BMS when it is determined that automatic recognition is necessary through the automatic recognition necessity determination step; A second automatic recognition step in which each BMS checks the position information that is determined in the first automatic recognition step and the master BMS designates the number of the slave BMS; A third automatic recognition step of completing the automatic recognition step; And a normal mode operation step in which each BMS operates in a normal mode; , ≪ / RTI >
The automatic recognition necessity determination step may determine that the automatic recognition step is necessary when each BMS receives the recognition ID from at least one other BMS or if there is no position information in its storage element .
Wherein the automatic recognition necessity determination step determines whether or not each BMS has received the recognition ID from at least one other BMS or if the position information is present in the storage element of the BMS, An entry condition determination step, or a slave BMS entry condition determination step.
The master BMS entry condition determination step determines whether the cycle ID of the slave BMS stored in the storage element of the master BMS, in which the position information is the master BMS, is not received within a preset time, If the same cycle ID is received, the master BMS may determine that the automatic recognition step needs to be performed.
The slave BMS entry condition determination step determines whether the slave BMS has received the cycle ID of the master BMS stored in the storage element of the slave BMS whose position information is the slave BMS, , It can be determined that the slave BMS needs to perform the automatic recognition step.
The first automatic recognition step may include: a self-recognition ID transmission step in which each of the BMSs increases its counter value of transmitting and recognizing its own recognition ID to other BMSs; Determining whether each BMS has received an ID of another BMS that determines whether or not to receive a recognition ID of another BMS; Determining whether rule data is included in the recognition ID of the other BMS received by the respective BMSs when the recognition ID of the other BMS is received; Determining whether a new serial number is included in the recognition ID of the other BMS received by each BMS when the rule data is included; A priority determination step of determining, when the new serial number is included, whether the priority order of the new serial number received by each BMS is higher than a priority order of its own serial number; Storing a slave BMS position in which each BMS stores its own position information in a slave BMS if the priority of the new serial number is higher than a priority of the own serial number; And if the priority of the new serial number is lower than the priority of the own serial number, each BMS increments its slave BMS counter value by 1 and transmits the received new A new slave BMS registration step of storing serial information; As shown in FIG.
Wherein the first automatic recognition step comprises: a step of determining whether the recognition performance is repeated if the rule data is not included, and determining whether the BMS has a value equal to or larger than a preset reference recognition counter value; Storing the master BMS position information in which each BMS stores its own position information in the master BMS when the recognition counter value is equal to or greater than the recognition performance counter reference value; Determining whether a slave BMS counter value of the slave BMS counter pre-stored in its storage element of the master BMS storing the position information of its own is stored in the master BMS; If the pre-stored slave BMS counter value is not 0, the master BMS storing the own position information in the master BMS recognizes that another slave BMS is present, and moves to the second automatic recognition step to perform the corresponding step can do.
The second automatic recognition step recognizes that the master BMS storing its own position information in the master BMS through the first automatic recognition step transmits the recognition ID of the master BMS to each slave BMS stored in the serial information of its own repository An individual slave BMS identification step; Receiving an ACK signal of an individual slave BMS in which the master BMS receives an ACK signal from each slave BMS; Determining whether the total slave BMS is normally recognized whether the number of the ACK signals received by the master BMS matches a slave counter value stored in its storage element; When the number of received ACK signals matches the slave counter value, the master BMS determines that the normal recognition of the entire slave BMS is completed, and moves to the third automatic recognition step to perform the corresponding step.
Wherein the second automatic recognition step includes: a recognition ID receiving step in which a slave BMS storing its own position information through the first automatic recognition step receives a recognition ID including a serial number of a slave BMS from a master BMS; A slave BMS serial number identification step of determining whether the serial number of the slave BMS received by the slave BMS is identical to its own serial number stored in the storage element of the slave BMS; And generating the ACK signal indicating that the slave BMS has successfully received the serial number of the slave BMS if the received serial number of the slave BMS matches the serial number of the slave BMS, A response signal transmitting step; As shown in FIG.
The master BMS and the slave BMS recognition method of a plurality of battery pack systems according to embodiments of the present invention automatically recognize the master BMS and the slave BMS in a system in which two or more BMSs are configured in parallel, Can be performed.
Brief Description of the Drawings Figure 1 is an illustration of a system in which two or more BMSs are configured in parallel in accordance with an embodiment of the present invention.
2 is a flowchart illustrating a method of recognizing a master BMS and a slave BMS in a plurality of battery pack systems according to an embodiment of the present invention.
3 is a flowchart showing a common entry condition determining step in an automatic recognition necessity determination step according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a step of determining a master BMS entry condition in an automatic recognition necessity determination step according to an embodiment of the present invention. FIG.
5 is a flowchart illustrating a step of determining a slave BMS entry condition in an automatic recognition necessity determination step according to an embodiment of the present invention.
6 to 7 are flowcharts showing a first automatic recognition step of automatic recognition necessity determination steps according to an embodiment of the present invention.
8 is a flowchart showing a second automatic recognition step of the master BMS among the automatic recognition necessity determination steps according to the embodiment of the present invention.
9 is a flowchart showing a second automatic recognition step of a slave BMS in an automatic recognition necessity determination step according to an embodiment of the present invention;
10 is a flowchart showing a third automatic recognition step of the master BMS among the automatic recognition necessity determination steps according to the embodiment of the present invention.
11 is a flowchart showing a third automatic recognition step of a slave BMS in an automatic recognition necessity determination step according to an embodiment of the present invention.
FIG. 12 is a flowchart illustrating steps of operating in a normal mode according to an embodiment of the present invention. FIG.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.
First, the following terms are defined to help understand the master BMS and slave BMS recognition methods of a plurality of battery pack systems according to an embodiment of the present invention.
The recognition mode according to the embodiment of the present invention may mean a mode in which the BMS included in each battery pack performs an automatic recognition operation for recognizing the master BMS and the slave BMS.
In the general mode according to the embodiment of the present invention, after the BMS included in each battery pack recognizes the master BMS and the slave BMS, the BMS included in each battery pack transmits its cycle ID to another BMS, It may mean a mode for performing the protection operation of the battery pack.
The recognition ID according to the embodiment of the present invention may mean information used by the BMS included in each battery pack in the recognition mode.
In addition, the recognition ID according to the embodiment of the present invention may include information such as recognition ID information, step information of the currently performed recognition mode, unique serial number of each BMS, and rule data.
The cycle ID according to the embodiment of the present invention may mean information indicating a unique ID used by the BMS included in each battery pack for which the recognition mode is ended to distinguish between the master BMS and the slave BMS recognized in the normal mode have.
For example, the BMS included in each battery pack in which the recognition mode according to the embodiment of the present invention ends has its own cycle ID after the recognition mode is terminated according to the cycle ID transmission cycle time information previously stored in the storage device, .
In addition, the period ID according to the embodiment of the present invention is divided into a cycle ID of the master BMS and a plurality of slave cycle IDs, and each cycle ID may include information that can be distinguished from each other.
The communication ID according to the embodiment of the present invention may mean ID information used for data communication between the master BMS and the slave BMS. The communication ID can be changed by the setting of the user as required.
The rule data according to the embodiment of the present invention is information stored in the storage element of the BMS included in each battery pack and stores information such as the recognition ID, cycle ID and communication ID of one master BMS and a plurality of slave BMSs recognized . That is, rule data can be generated and stored in storage elements of the BMS included in each battery pack in which at least one recognition mode has been performed.
In addition, the rule data according to the embodiment of the present invention may include a recognition ID when the BMS of each battery pack transmits its recognition ID to another BMS, and may be transmitted to another BMS.
The position information according to the embodiment of the present invention is information stored in the storage element of the BMS included in each battery pack, and its position can be stored as a master BMS or a slave BMS.
The position information according to the embodiment of the present invention is information stored in the storage element of the BMS included in each battery pack and stores its position information in one of the master BMS or the slave BMS, Information can also be stored together for each BMS serial number.
The storage device according to the embodiment of the present invention is included in each battery pack and various data necessary for performing the recognition mode and the general mode can be stored in advance.
Hereinafter, a plurality of battery pack systems will be described with reference to FIG. 1 to assist understanding of a master BMS and a slave BMS recognition method of a plurality of battery pack systems according to embodiments of the present invention.
1. Multiple battery pack systems.
1 is an exemplary diagram illustrating a system in which two or more BMSs are configured in parallel according to an embodiment of the present invention.
Referring to FIG. 1, a
The
The recognition between the
2. Master BMS and slave BMS recognition method of a plurality of battery pack systems according to an embodiment of the present invention
2 is a flowchart illustrating a method of recognizing a master BMS and a slave BMS in a plurality of battery pack systems according to an embodiment of the present invention.
Referring to FIG. 2, a plurality of battery packs (not shown) included in the
If it is determined in step S210 that automatic recognition is required, the BMS of each battery pack may perform a first automatic recognition step S220 of determining the position of each BMS.
On the other hand, if it is determined in step S210 that automatic recognition is not required, the BMS of each battery pack may move to the normal mode operation step S250 and perform the corresponding step.
After the first automatic recognition step (S220), the BMS of each battery pack may perform a second automatic recognition step (S230) of checking the position of each BMS that has been determined and designating the number of the slave BMS.
Thereafter, the BMS of each battery pack may perform a third automatic recognition step (S240) to complete the automatic recognition step.
Thereafter, the BMS of each battery pack may perform a normal mode operation step (S250) in which it operates in the normal mode.
2.1. A detailed description of the automatic recognition necessity determination step (S210) according to the embodiment of the present invention
The automatic recognition necessity determination step S210 according to an exemplary embodiment of the present invention includes a common entry condition determination step, a master BMS entry condition determination step, and a slave BMS entry condition determination step, which will be described below.
2.1.1. The common entry condition determination step according to the embodiment of the present invention
3 is a flowchart illustrating a common entry condition determination step in an automatic recognition necessity determination step according to an embodiment of the present invention.
The BMS of each battery pack may perform a recognition ID reception determination step (S211) for determining whether a recognition ID is received from at least one other BMS.
When the recognition ID is received, the BMS of each battery pack determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
If the recognition ID is not received, the BMS of each battery pack moves to one of the master BMS entry condition determination step (S213) or the slave BMS entry condition determination step (S214) according to its position stored in the storage element You can perform that step.
In addition, the BMS of each battery pack may perform the step S212 of determining that there is no position information in the storage element of the battery pack.
If the position information does not exist, the BMS of each battery pack determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
When the position information exists, the BMS of each battery pack moves to one of the master BMS entry condition determination step S213 or the slave BMS entry condition determination step S214 according to its own position previously stored in the storage element You can perform that step.
The common entry condition determining step determines that the automatic recognition is necessary when the recognition ID is received from at least one other BMS or the position information does not exist in the storage element of the BMS of each battery pack, (S220) and perform the corresponding step.
In the common entry condition determination step, if the BMS of each battery pack does not receive the recognition ID from at least one other BMS or position information exists in its own storage device, The BMS entry condition determination step S213 or the slave BMS entry condition determination step S214 may be performed to perform the corresponding step.
2.1.2. The master BMS entry condition determination step according to the embodiment of the present invention
4 is a flowchart illustrating a step of determining a master BMS entry condition in an automatic recognition necessity determination step according to an embodiment of the present invention.
Referring to FIG. 4, the master BMS may perform a step S213-1 of determining whether the cycle ID of the slave BMS already stored in the storage device has not been received within a preset time in the storage device. Here, the predetermined time in the storage element may mean period ID transmission cycle time information stored in advance in the storage element.
If the cycle ID of the previously stored slave BMS is not received within a preset time, the master BMS determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
If the cycle ID of the previously stored slave BMS is received within a predetermined time, the master BMS determines that automatic recognition is unnecessary, and moves to the normal mode operation step (S250) to perform the corresponding step.
In addition, the master BMS may perform a step S213-2 of determining whether to receive a non-storing period ID to determine whether a period ID different from the period ID of the set slave BMS has been received.
If the non-storing period ID is received, the master BMS determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
If the non-storing period ID is not received, the master BMS determines that automatic recognition is not necessary, and moves to the normal mode operation step (S250) to perform the corresponding step.
In addition, the master BMS may perform step S213-3 of determining whether the cycle ID of the master BMS is received or not, which determines whether the cycle ID of the master BMS has been received.
If the cycle ID of the master BMS is received, the master BMS determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
It is determined that the cycle ID of the master BMS is not received and that the master BMS does not need automatic recognition, and the process proceeds to the normal mode operation step (S250) to perform the corresponding step.
If the periodic ID of the previously stored slave BMS is not received within a predetermined time, the non-storing period ID is received, or the period ID of the period is received, the master BMS judging step (S213) determines that automatic recognition is necessary And then proceeds to the first automatic recognition step S220 to perform the corresponding step.
2.1.3. The slave BMS entry condition determination step according to the embodiment of the present invention
5 is a flowchart illustrating a step of determining a slave BMS entry condition in an automatic recognition necessity determination step according to an embodiment of the present invention.
Referring to FIG. 5, the slave BMS may perform a step S214-1 of determining whether a master BMS cycle ID has not been received within a preset time in the storage device. Here, the predetermined time in the storage element may mean period ID transmission cycle time information stored in advance in the storage element.
If the cycle ID of the pre-stored master BMS is not received within a predetermined time, the slave BMS determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
If the cycle ID of the pre-stored master BMS is received within a predetermined time, the slave BMS determines that automatic recognition is unnecessary, and moves to the normal mode operation step (S250) to perform the corresponding step.
In addition, the slave BMS may perform the step S213-3 of determining whether the cycle ID of the slave BMS of the master BMS has been received, which determines whether the cycle ID of the slave BMS has been received.
If the cycle ID of the slave BMS is received, the slave BMS determines that automatic recognition is necessary, and moves to the first automatic recognition step (S220) to perform the corresponding step.
It is determined that the period ID of the slave BMS of the slave BMS is not received and the slave BMS does not need to automatically recognize the period ID, and the main mode operation step S250 is performed.
If the cycle ID of the master BMS is not received within a predetermined time or the cycle ID of the slave BMS of the slave BMS is received, the step S214 of determining the slave BMS entry condition determines that the slave BMS requires automatic recognition, It is possible to move to the automatic recognition step S220 and perform the corresponding step.
2.2. The first automatic recognition step according to the embodiment of the present invention
6 to 7 are flowcharts illustrating a first automatic recognition step of the automatic recognition necessity determination step according to the embodiment of the present invention.
6 to 7, the BMS of each battery pack according to the embodiment of the present invention transmits its own recognition ID previously stored in the storage element to other BMSs and increases the recognition counter value stored in advance in the storage element by 1 (Step S220-1).
Thereafter, the BMS of each battery pack may perform the step S220-2 of determining whether or not to receive the ID of another BMS, which determines whether the recognition ID of another BMS has been received.
If the IDs of the other BMSs are not received, the BMSs of the respective battery packs may move to the recognized ID transmission step S220-1 and perform the corresponding processes.
When the IDs of the different BMSs are received, the BMS of each battery pack can perform the step S220-3 of determining whether or not rule data is included in the received recognition ID to determine whether rule data is included.
When the rule ID is not included in the received recognition ID, the BMS of each battery pack determines whether the recognition counter value stored in the storage element has a value equal to or larger than the recognition performance counter reference value stored in advance in the storage element. And may perform the determination step S220-8. If the recognition performance counter value has a value less than the recognition performance counter reference value stored in advance in the storage element, the BMS of each battery pack may move to the recognition ID transmission step (S220-1) to perform the corresponding process.
When the recognition performance counter value has a value equal to or larger than the recognition counter reference value stored in advance in the storage element, the BMS of each battery pack stores the position information of the storage device in the master BMS position information storage step S220-9).
After that, the master BMS storing the own position information as the master BMS can perform the step S220-10 of determining whether the slave BMS counter pre-stored in the storage element is 0 or not.
If the pre-stored slave BMS counter value is not 0, the master BMS storing the own position information as the master BMS recognizes that the slave BMS exists, moves to the second automatic recognition step (S230), and performs the corresponding step .
If the pre-stored slave BMS counter value is 0, the master BMS storing the own position information as the master BMS recognizes that the slave BMS does not exist, moves to the normal mode operation step (S250) have.
On the other hand, when rule ID data is included in the received recognition ID, the BMS of each battery pack can perform a step S220-4 of determining whether a new serial number is included in the received recognition ID have. If the received recognition ID does not include the new serial number, the process proceeds to the self-recognized ID transmission step (S220-1) and the corresponding process can be performed.
When a new serial number is included in the received recognition ID, the BMS of each battery pack determines priority order (S220-6) of determining whether the priority of the received new serial number is higher than the priority of its own serial number Can be performed.
If the priority of the received new serial number is higher than that of its own serial number, the BMS of each battery pack stores the position information of the battery pack in the slave BMS (S220- 6).
If the priority of the received new serial number is lower than the priority of its own serial number, the BMS of each battery pack increases the value of the slave BMS counter of the storage device by 1, After performing the new slave BMS registration step (S220-7) for storing the new serial information received in the information, it is possible to move to the own identification ID transmission step (S220-1) and perform the corresponding process.
2.3. The second automatic recognition step of the master BMS according to the embodiment of the present invention
8 is a flowchart showing a second automatic recognition step of the master BMS among the automatic recognition necessity determination steps according to the embodiment of the present invention.
Referring to FIG. 8, a master BMS storing its own position information as a master BMS through a first automatic recognition step (S220) acquires a recognition ID of the master BMS by each slave BMS having a serial number stored in the serial information of the repository And an individual slave BMS identification step (S231-1) for requesting transmission of an ACK signal as a response signal.
Thereafter, the master BMS may perform an ACK signal receiving step (S231-2) of the individual slave BMS receiving the ACK signal from each slave BMS.
Thereafter, the master BMS may perform a step S 231 - 3 of determining whether the total slave BMS is normally recognized to determine whether the number of received ACK signals matches the slave counter value stored in advance in the storage element.
If the number of received ACK signals matches the slave counter value, the master BMS determines that the normal recognition of the entire slave BMS is completed, and moves to the third automatic recognition step (S240) to perform the corresponding step.
If the number of received ACK signals does not match the slave counter value, the master BMS determines that the normal recognition of the entire slave BMS is not completed, and moves to the first automatic recognition step (S220) to perform the corresponding step .
2.4. In the second automatic recognition step of the slave BMS according to the embodiment of the present invention
9 is a flowchart showing a second automatic recognition step of a slave BMS in an automatic recognition necessity determination step according to an embodiment of the present invention.
Referring to FIG. 9, the slave BMS storing its own position information through the first automatic recognition step (S220) receives the recognition ID including the serial number of the slave BMS from the master BMS S230-4).
Thereafter, the slave BMS checks the slave BMS serial number (S230-5) to determine whether the serial number of the received slave BMS matches the serial number of the slave BMS indicating its own serial number stored in its storage element Can be performed.
If the received serial number of the slave BMS matches its own serial number, the slave BMS generates and transmits an ACK signal indicating that the serial number of the slave BMS has been normally received, to the master BMS S230-6, and then proceeds to the third automatic recognition step S240 to perform the corresponding step.
If the received serial number of the slave BMS does not match its own serial number, the slave BMS determines that the normal recognition of the entire slave BMS has not been completed, proceeds to the first automatic recognition step (S220) can do.
2.5. The third automatic recognition step of the master BMS according to the embodiment of the present invention
10 is a flowchart showing a third automatic recognition step of the master BMS among the automatic recognition necessity determination steps according to the embodiment of the present invention.
Referring to FIG. 10, the master BMS includes a master BMS cycle ID transmission step (S240-1) of incrementing a transmission counter value indicating the number of transmissions of the period ID of the reservoir by one and transmitting the cycle ID of the master BMS to the registered slave BMS, Can be performed.
Thereafter, the master BMS may perform a period ID retransmission determination step (S240-2) for determining whether the transmission counter value of the storage element has a value equal to or larger than the reference value of the transmission period count counter stored in advance in the storage element.
If the transmission counter value of the storage element has a value less than the reference value of the transmission counter counter stored in advance in the storage element, the master BMS determines that the retransmission of the cycle ID is necessary and goes to the master BMS cycle ID transmission step S240-1 So that the corresponding step can be performed.
When the transmission counter value of the storage element has a value equal to or larger than the reference value of the transmission cycle count counter stored in advance in the storage element, the master BMS determines that retransmission of the cycle ID is not necessary and stores position information And a master BMS automatic recognition termination step S240-3 for storing a slave BMS counter value.
Thereafter, the master BMS may move to the normal mode operation step (S250) and perform the corresponding step.
2.6. The third automatic recognition step of the master BMS according to the embodiment of the present invention
11 is a flowchart showing a third automatic recognition step of a slave BMS in an automatic recognition necessity determination step according to an embodiment of the present invention.
Referring to FIG. 11, the slave BMS may perform a master BMS cycle ID receiving step (S240-4) for receiving the cycle ID of the master BMS from the master BMS.
Thereafter, the slave BMS can perform the master BMS cycle ID registration step (S240-5) in which the cycle ID of the received master BMS is stored in the period ID information of the repository. Can be performed. Here, the cycle ID of the master BMS stored in the storage element by the slave BMS can be stored together with the rule data.
Thereafter, the slave BMS may perform a slave BMS automatic recognition termination step S240-6 for storing the position information, the slave BMS counter value, and the period ID information in one storage area of the storage device used for the normal mode operation.
Thereafter, the slave BMS may move to the normal mode operation step (S250) and perform the corresponding step.
2.7. The normal mode operation step < RTI ID = 0.0 >
FIG. 12 is a flowchart illustrating a general mode operation step according to an embodiment of the present invention.
Referring to FIG. 12, the master BMS may perform a master BMS cycle ID broadcasting step S251 of broadcasting its cycle ID to a slave BMS registered in a storage device at a predetermined period.
Thereafter, the individual slave BMS receiving the cycle ID of the master BMS may perform the individual slave BMS cycle ID transmission step (S252) in which the cycle ID of the individual slave BMS is transmitted to the master BMS according to a preset cycle in the storage device.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.
100: A system in which more than two battery packs are configured in parallel
110: Master BMS
120: Slave BMS
Claims (9)
A first automatic recognition step where each BMS decides its own position information to the master BMS or the slave BMS when it is determined that automatic recognition is necessary through the automatic recognition necessity determination step;
A second automatic recognition step in which each BMS checks the position information that is determined in the first automatic recognition step and the master BMS designates the number of the slave BMS;
A third automatic recognition step of completing the automatic recognition step; And
A normal mode operation step in which each of the BMSs operates in a normal mode; Wherein the master BMS and the slave BMS recognize a plurality of battery pack systems.
Wherein each BMS determines that it is necessary to perform the automatic recognition step if it receives the recognition ID from at least one other BMS or if there is no position information in its storage element Master BMS and slave BMS recognition method.
When each BMS does not receive a recognition ID from at least one other BMS or if position information exists in its storage element, a master BMS entry condition determination step or a slave BMS entry step according to its own position information stored in the storage element Wherein the step of determining the condition of the BMS comprises the steps of: determining whether the BMS is a master BMS or a slave BMS.
When the cycle ID of the slave BMS in which the position information is the master BMS is stored in the storage element of the master BMS is not received within a preset time or the cycle ID which is not stored or received is received, Wherein the master BMS determines that the automatic recognition step needs to be performed.
When the slave BMS, in which the position information is the slave BMS, does not receive the cycle ID of the master BMS previously stored in the storage element of the slave BMS, Wherein the determining step determines that the execution of the step BMS is required for the master BMS and the slave BMS of the plurality of battery pack systems.
A self-recognized ID transmission step in which each of the BMSs increases its counter value of transmitting and recognizing its own recognition ID to other BMSs;
Determining whether each BMS has received an ID of another BMS that determines whether or not to receive a recognition ID of another BMS;
Determining whether rule data is included in the recognition ID of the other BMS received by the respective BMSs when the recognition ID of the other BMS is received;
Determining whether a new serial number is included in the recognition ID of the other BMS received by each BMS when the rule data is included;
A priority determination step of determining, when the new serial number is included, whether the priority order of the new serial number received by each BMS is higher than a priority order of its own serial number;
Storing a slave BMS position in which each BMS stores its own position information in a slave BMS if the priority of the new serial number is higher than a priority of the own serial number; And
If the priority of the new serial number is lower than the priority of the own serial number, each BMS increments its slave BMS counter value by 1, A new slave BMS registration step of storing information; The method further comprising the steps of: receiving the master BMS and the slave BMS from the plurality of battery pack systems;
Determining whether a recognition execution iteration is necessary to determine whether each of the BMSs has a value of the recognition performance counter value equal to or greater than a predetermined recognition performance counter reference value if the rule data is not included;
Storing the master BMS position information in which each BMS stores its own position information in the master BMS when the recognition counter value is equal to or greater than the recognition performance counter reference value;
Determining whether a slave BMS counter value of the slave BMS counter pre-stored in its storage element of the master BMS storing the position information of its own is stored in the master BMS;
If the pre-stored slave BMS counter value is not 0, the master BMS storing the own position information in the master BMS recognizes that another slave BMS is present, and moves to the second automatic recognition step to perform the corresponding step And a master BMS and a slave BMS recognition method of a plurality of battery pack systems.
An individual slave BMS identification step of the master BMS storing its own position information through the first automatic recognition step transmits the recognition ID of the master BMS to each slave BMS stored in the serial information of its own repository;
Receiving an ACK signal of an individual slave BMS in which the master BMS receives an ACK signal from each slave BMS;
Determining whether the total slave BMS is normally recognized whether the number of the ACK signals received by the master BMS matches a slave counter value stored in its storage element;
When the number of received ACK signals matches the slave counter value, the master BMS determines that normal recognition of the entire slave BMS is completed, and moves to the third automatic recognition step to perform the corresponding step A master BMS and a slave BMS recognition method of a plurality of battery pack systems.
Receiving a recognition ID including a serial number of a slave BMS from a master BMS, the slave BMS storing its own position information in the slave BMS through the first automatic recognition step;
A slave BMS serial number identification step of determining whether the serial number of the slave BMS received by the slave BMS is identical to its own serial number stored in the storage element of the slave BMS; And
Generating and transmitting the ACK signal indicating that the slave BMS has successfully received the serial number of the slave BMS if the received serial number of the slave BMS matches the serial number of the slave BMS, A signal transmission step; The method further comprising the steps of: receiving the master BMS and the slave BMS from the plurality of battery pack systems;
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