CN110967648A - Sampling circuit and control method thereof - Google Patents
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- CN110967648A CN110967648A CN201910142770.2A CN201910142770A CN110967648A CN 110967648 A CN110967648 A CN 110967648A CN 201910142770 A CN201910142770 A CN 201910142770A CN 110967648 A CN110967648 A CN 110967648A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The invention discloses a sampling circuit and a control method thereof. The circuit, comprising: the device comprises a sampling processing module, a controller, a first isolation module and a second isolation module, wherein the first isolation module and the second isolation module are connected with the controller; the first isolation module, the sampling processing module and the second isolation module are sequentially connected in series to form a first daisy chain, and the first isolation module, the sampling processing module and the second isolation module are sequentially connected in series to form a second daisy chain; the sampling processing module is used for acquiring state data of a plurality of battery cell units in the battery pack and determining a first maximum value and a first minimum value in the acquired state data; the first daisy chain is used for transmitting the state data of the plurality of battery cell units in the battery pack to the controller, and the second daisy chain is used for transmitting the first maximum value and the first minimum value to the controller; the controller is used for judging whether the battery pack is abnormal or not based on the first maximum value and/or the first minimum value. According to the embodiment of the invention, the abnormity of the battery pack can be found in time.
Description
Technical Field
The invention relates to the field of batteries, in particular to a sampling circuit and a control method thereof.
Background
The traditional automobile development taking an internal combustion engine as a core is close to the peak, and together with the problems of increasing energy shortage, environmental pollution and the like, various countries in the world have launched a fuel automobile sale prohibition schedule, and the development of new energy automobiles is greatly supported. In recent years, the new energy industry is developed vigorously thanks to the support of national policies, so that the rapid development of the electric automobile industry is driven, and the trend of replacing the traditional fuel oil automobile is hidden. For an electric automobile, a battery pack is equivalent to gasoline of a fuel automobile, and a battery module in the battery pack is an important constituent unit of the battery pack. Therefore how to fast and accurately acquire the state data of each electric core unit in the battery module, and timely process the abnormal condition of the battery pack, so that the safety of passengers becomes the focus of industry attention.
Most of the currently known battery module data sampling methods adopt a single-chain daisy chain to collect state data of each battery cell in a battery pack, such as voltage, current, temperature and other data, and then transmit the state data of the battery cell to a Micro Controller Unit (MCU) in a battery management Unit through the daisy chain. And the MCU analyzes and processes the cell state data, reports a fault when abnormality is found, and then is judged and processed by a passenger.
However, due to the fact that the electric vehicle MCU has a lot of data to process, the battery pack abnormality cannot be timely found, and the fault cannot be timely reported. In the existing mode, the MCU checks the state data of each cell unit one by one, and it cannot determine that the battery pack is abnormal until the state data of a certain cell unit is found to be abnormal. Under the processing mechanism, the MCU can find the abnormal state data of the battery core for a long time, so that the fault cannot be reported in time. That is, the battery management unit has low timeliness of finding the abnormality of the battery pack.
Disclosure of Invention
The sampling circuit and the control method of the sampling circuit improve the timeliness of finding the abnormality of the battery pack.
According to an aspect of an embodiment of the present invention, there is provided a sampling circuit, including: the device comprises a sampling processing module, a controller, a first isolation module and a second isolation module, wherein the first isolation module and the second isolation module are connected with the controller; wherein the content of the first and second substances,
the first isolation module, the sampling processing module and the second isolation module are sequentially connected in series to form a first daisy chain, and the first isolation module, the sampling processing module and the second isolation module are sequentially connected in series to form a second daisy chain;
the sampling processing module is used for acquiring the state data of the plurality of battery cell units in the battery pack and determining a first maximum value and a first minimum value in the acquired state data of the plurality of battery cell units;
the first daisy chain is used for transmitting the state data of the plurality of battery cell units in the battery pack to the controller, and the second daisy chain is used for transmitting the first maximum value and the first minimum value to the controller;
the controller is used for judging whether the battery pack is abnormal or not based on the first maximum value and/or the first minimum value.
According to another aspect of the embodiments of the present invention, there is provided a method for controlling a sampling circuit, which is applied to the sampling circuit provided in the embodiments of the present invention, the method for controlling the sampling circuit including:
the controller receives a first maximum value and a first minimum value transmitted through the second daisy chain;
the controller judges whether the battery pack is abnormal or not according to the first maximum value and/or the first minimum value.
According to the sampling circuit and the control method of the sampling circuit in the embodiment of the invention, the maximum value and the minimum value in the state data of all the electric core units of the battery pack are quickly transmitted to the controller by utilizing the second daisy chain, and the controller can timely judge whether the battery pack is abnormal or not according to the maximum value and the minimum value in the state data of all the electric core units of the battery pack because the data transmission quantity of the maximum value and the minimum value is small.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sampling circuit according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a sampling circuit according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a sampling circuit according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a sampling circuit according to a fourth embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of a sampling circuit according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For a better understanding of the present invention, a sampling circuit and a control method thereof according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that these examples are not intended to limit the scope of the present disclosure.
Fig. 1 shows a schematic structural diagram of a sampling circuit according to some embodiments of the present invention. As shown in fig. 1, a sampling circuit according to an embodiment of the present invention includes: the system comprises a sampling processing module M, a controller C, and a first isolation module G1 and a second isolation module G2 connected with the controller C.
The first isolation module G1, the sampling processing module M, and the second isolation module G2 are sequentially connected in series to form a first daisy chain, and the first isolation module G1, the sampling processing module M, and the second isolation module G2 are sequentially connected in series to form a second daisy chain.
The sampling processing module M is used for acquiring the state data of the plurality of battery cell units in the battery pack and determining a first maximum value and a first minimum value in the acquired state data of the plurality of battery cell units.
The first daisy chain is used for transmitting the status data of the plurality of cell units in the battery pack P to the controller C, and the second daisy chain is used for transmitting the first maximum value and the first minimum value to the controller C.
The controller C is configured to determine whether the battery pack P is abnormal based on the first maximum value and/or the first minimum value.
It should be noted that the state data of the multiple cell sampling units of the battery pack P, which is acquired by the sampling processing module M, is the state data of all the cell units in the battery pack P.
In an embodiment of the present invention, the state data may be data of voltage, current, temperature, charge state, and the like, and is not limited herein. When the sampling processing module M collects a plurality of different state data of the cell units, the maximum value and the minimum value of each state data in all the state data of all the cell units in the battery pack are transmitted to the controller C through the second daisy chain.
In the sampling circuit provided by the embodiment of the present invention, the state data of all the battery cell units in the battery pack P is transmitted to the controller C through the first daisy chain, and the first maximum value and the first minimum value in the state data of all the battery cell units in the battery pack are transmitted to the controller C through the second daisy chain. Since the data amount of the second daisy chain is small, the first maximum value and the first minimum value are preferentially transmitted to the controller C. After the controller C receives the first maximum value and the first minimum value, it immediately determines whether the battery pack P is abnormal according to the first maximum value and the first minimum value. Therefore, abnormal cell state data in the battery pack P can be found in time according to the first maximum value and the first minimum value, and whether the battery pack P is abnormal or not can be judged in time.
In some embodiments of the present invention, the controller C may determine whether the battery pack P is abnormal according to a magnitude relationship between the first maximum value and the first preset threshold, and a magnitude relationship between the first minimum value and the second preset threshold. And if the first maximum value is larger than a first preset threshold value and/or the first minimum value is smaller than a second preset threshold value, the abnormal state data of the battery cell unit is represented. That is, the battery pack is abnormal.
When the controller C finds that the battery pack P is abnormal, the controller C can control the switch module K in fig. 1 to timely handle the abnormality of the battery pack P, so as to improve the safety of the battery pack P.
As shown in fig. 1, the switch module K is connected to the battery pack P and the controller C, respectively. The switch module K and the battery pack P are disposed in a main circuit of the battery pack P. The main circuit of the battery includes not only the battery pack P and the switch module K, but also a load (not shown in the figure). When the switch module K is in a closed state, the main circuit is in a conductive state, and the battery pack P is used to supply power to various loads in the main circuit. The switch module K includes, but is not limited to, a relay.
And when the controller C determines that the first maximum value is larger than a first preset threshold value and/or the first minimum value is smaller than a second preset threshold value, sending a disconnection instruction to the switch module K. The switch module K is switched from the closed state to the open state based on the open instruction so as to cut off a main loop where the battery pack P is located, and therefore the safety of the battery pack P is improved.
It should be noted that the first daisy chain may be used to transmit all status data of all the battery cells in the battery pack P to the controller C, and may also be used to transmit the first maximum value and the first minimum value to the controller C. Similarly, the second daisy chain may be used to transmit not only the first maximum value and the first minimum value to the controller C, but also all status data of all the cell units in the battery pack P to the controller C. In practical application, according to practical application requirements, all the state data and the most value (i.e., the first maximum value and the first minimum value) of all the battery cell units can be respectively transmitted to the controller C by using the two daisy chains.
Fig. 2 is a schematic structural diagram of a sampling circuit according to another embodiment of the present invention. Fig. 2 shows a specific structure of the sampling processing module M.
The sampling circuit provided by the embodiment of the invention can be applied to a scene of acquiring the state data of the battery cell unit in the battery pack P. The battery pack P is composed of battery modules, and comprises N battery modules. There are a plurality of electricity core unit in every battery module, increase the quantity of battery module and link together through reasonable mode and just constitute battery package P.
As shown in FIG. 2, the sampling processing module M comprises N sampling processing units connected in series, i.e. the 1 st sampling processing unit M12 nd sampling processing unit M2… … and Nth sampling processing unit MN。
First isolation module G1 and 1 st sampling processing unit M12 nd sampling processing unit M2… … Nth sampling processing unit MNAnd the second isolation module G2 are serially connected in sequence to form a first daisy chain. The first isolation module G1 and the 1 st sampling processing unit M12 nd sampling processing unit M2… … Nth sampling processing unit MNAnd the second isolation module G2 in series in turn also form a second daisy chain.
Wherein, every sampling processing unit all is connected with a battery module for the state data of every electric core in the battery module that the collection corresponds with this sampling unit.
As one example, the controller is an MCU of the battery management unit. Referring to fig. 2, the switch module K is connected to the positive electrode of the battery pack.
In some examples, both the first daisy chain and the second daisy chain use a Universal Asynchronous Receiver/Transmitter (UART) protocol.
In some examples, the first UART communication interface of the first isolation module G1, the 1 st sampling processing unit M, are connected by a wire1The first UART communication interface and the 2 nd sampling processing unit M2… …. Nth sampling processing unit MNI.e., form a first daisy chain, with the first UART communication interface of the second isolation module G2. That is, the first isolation module G1, the 1 st sampling processing unit M12 nd sampling processing unit M2… … Nth sampling processing unit MNAnd the second isolation module G2, and the wires between every two adjacent first UART communication interfaces together form a first daisy chain.
Similarly, the second UART communication interface of the first isolation module G1, the 1 st sampling processing unit M are connected by a wire1Second UART communication interface, 2 nd sampling processing unit M2Second UART communication interface … … nth sample processing unit MNI.e., form a second daisy chain, with the second UART communication interface of the second isolation module G2. That is, the first isolation module G1, the 1 st sampling processing unit M12 nd sampling processing unit M2… … Nth sampling processing unit MNAnd the second isolation module G2, and the wires between each two adjacent second UART communication interfaces together form a second daisy chain.
In an embodiment of the present invention, the first isolating module G1, the controller C, and the second isolating module G2 are integrated on a printed circuit board. Data interaction is performed between the first isolation module G1 and the controller C and between the second isolation module G2 and the controller C by using Serial Peripheral Interface (SPI) communication protocols.
Since the UART protocol is used in both the first daisy chain and the second daisy chain, and the SPI communication protocol is used internally in the printed circuit board, the first isolation module G1 and the second isolation module G2 are used to convert the UART data into the SPI data to complete the communication. In addition, the first isolation module G1 is also used to isolate the high voltage of the sampling processing module M and the battery pack from the controller C, so as to avoid the damage of the battery pack and the sampling processing module to the controller C. The second isolation module G2 is also used to isolate the low voltage of the sampling processing module M and the battery pack from the controller C, so as to avoid the damage of the battery pack and the sampling processing module to the controller C.
As a specific example, the controller C has 4 SPI communication interfaces, wherein two SPI communication interfaces are connected with two SPI communication interfaces of the first isolation module G1, respectively, for communicating with the first daisy chain and the second daisy chain, respectively. The other two SPI communication interfaces of controller C are connected to the two SPI communication interfaces of second isolation module G2, respectively, for communicating with the first daisy chain and the second daisy chain, respectively.
As an example, the controller C sends the first control command to the first UART communication interface of the first isolation module G1 through the SPI communication interface connected to the first isolation module and in communication with the first daisy chain. The first isolation module G1 transmits the first control command to each of the sampling processing units in turn through the first daisy chain. For example, the first control instruction is used for controlling each sampling processing unit to start to collect the state data in the corresponding battery module.
Similarly, each sampling processing unit transmits the state data of each cell unit collected from the corresponding battery module to the second isolation module G2 through the first daisy chain. For example, the 1 st sampling processing unit M1Through the 1 st sampling processing unit M in the first daisy chain1And 2 nd sampling processing unit M2The state data of each electric core unit in the 1 st battery module to be collected is transmitted to the 2 nd sampling processing unit M2. 2 nd sampling processing unit M2Through the 2 nd sampling processing unit M in the first daisy chain2And a3 rd sampling processing unit M3The 2 nd battery module and the 1 st battery module transmit the acquired state data of each battery cell unit to the 3 rd sampling processing unit M3. And so on, from top to bottom (i.e. from the 1 st sample processing unit M)1Point to the Nth sampling processing unit MNDirection) of the nth sampling processing unit MNThe state data of all the cell units in the battery pack P are acquired, and the state data of all the cell units in the battery pack P are transmitted to the second isolation module G2 through a line between the nth sampling processing unit and the second isolation module G2 in the first daisy chain. The second isolation module G2 transmits the status data of all the cell units in the battery pack P to the controller, forming a daisy chain communication structure.
In other embodiments of the present invention, the controller C may also send the first control command to the second isolation module G2, and the first control command is transmitted to each sampling processing unit in turn through the first daisy chain. The sample processing units are transferred from bottom to top (i.e., from the Nth sample processing unit M)NPoint to the 1 st sampling processing unit M1Direction of (d). 1 st sampling processing unit M1And transmitting the state data of all the cell units in the battery pack P to the controller C through the first isolation module G1 to form a ring-shaped daisy chain communication structure.
In an embodiment of the present invention, the controller C sends the second control command to the second UART communication interface of the first isolation module G1 through the SPI communication interface connected to the first isolation module G1 and communicating with the second daisy chain. The first isolation module G1 transmits a second control command to each of the sampling processing units in turn through the second daisy chain. For example, the second control instruction is used to control each sampling processing unit to acquire the maximum value and the minimum value of the state data of all the battery cell units in the corresponding battery module.
For each sampling processing unit, the sampling processing unit can automatically compare and obtain the maximum value and the minimum value of the state data of all the electric core units in the battery module corresponding to the sampling processing unit, and can also receive the maximum value and the minimum value of the state data of all the electric core units in other battery modules, and compare the maximum value and the minimum value of the state data of all the electric core units in the battery module.
For example, the 1 st sampling processing unit M1After the maximum value m1 and the minimum value n1 of the state data of the battery cell units in the 1 st battery module are obtained,through the 1 st sampling processing unit M in the second daisy chain1And 2 nd sampling processing unit M2The maximum value M1 and the minimum value n1 of the state data of the battery cell unit in the 1 st battery module are sent to the 2 nd sampling processing unit M by the line between2. 2 nd sampling processing unit M2After the maximum value m2 and the minimum value n2 of the state data of the cell units in the 2 nd battery module are obtained, the maximum values of m1 and m2 and the minimum values of n1 and n2 are obtained by comparing the maximum value m1 and the minimum value n1 of the state data of the cell units in the 1 st battery module.
Assuming that M1 is greater than M2, n1 is less than n2, the 2 nd sampling processing unit M2Through the 2 nd sampling processing unit M in the second daisy chain2And a3 rd sampling processing unit M3Line in between, transmitting M1 and n1 to the 3 rd sampling processing unit M3. Analogizing in turn, transmitting step by step through a second daisy chain, and an Nth sampling processing unit MNThe first maximum value and the first minimum value of the status data of all the cell units of the battery pack P will be acquired.
Nth sampling processing unit MNThe first maximum value and the first minimum value are transmitted to the second isolation module G2 through a line between the nth sampling processing unit and the second isolation module G2 in the second daisy chain. The second isolation module G2 then transmits the first maximum value and the first minimum value to the controller C, completing the ring link communication.
The controller C can determine the abnormality of the battery pack P based on the first maximum value and the first minimum value.
The sampling circuit provided by the embodiment of the invention adopts a double-chain daisy chain and samples the state data of the battery cell units in the battery module in a form of a ring-shaped daisy chain communication structure, wherein one loop transmits the state data of all the battery cell units, and the other loop transmits the maximum value and the minimum value in the state data of all the battery cell units. In the second daisy chain, only the maximum value and the minimum value in the state data of all the cell units are transmitted, the data volume is small, and the data volume is preferentially transmitted to the controller C for analysis. If the first maximum value is greater than the preset safety threshold value and/or the first minimum value is less than the preset safety threshold value, the controller C directly disconnects the switch module of the main loop where the battery pack P is located, the judgment time is short, and the response speed is high. And can rapidly cut off the high voltage when a malfunction occurs.
During operation of the sampling circuit, the sampling circuit may experience communication failures. For example, a single point communication failure occurs in the first daisy chain, that is, a node in a path formed by the sampling circuit is disconnected, which may cause the first daisy chain communication to be interrupted. Alternatively, the first isolation module G1 or the second isolation module G2 has a communication failure. The controller C may take a series of actions in response to a possible fault in the sampling circuit, as will be described in detail below.
1. When the first isolation module G1 and the 1 st sampling processing unit M in the first daisy chain1In the event of a single point of failure in line a1 between, the loop formed by the first daisy chain is broken. For example, the controller C may control the second isolation module G2 to transmit the first control command to each of the sampling processing units through the first daisy chain by managing the SPI communication interface which is itself connected with the second isolation module G2 and communicates with the first daisy chain. And controls the 1 st sampling processing unit M12 nd sampling processing unit M2… … Nth sampling processing unit MNThe Nth sampling processing unit M is transmitted from top to bottom through the first daisy chainNAnd transmitting the state data of all the battery cell units in the battery pack P to the controller C through the second isolation module G2.
That is, the controller C controls the sampling processing module to pass through the 1 st sampling processing unit M in the first daisy chain1And the plurality of lines between the second isolation module G2 transmit the status data of the plurality of cell units in the battery pack to the controller C. The plurality of cell units of the battery pack P are all the cell units in the battery pack P. 1 st sampling processing unit M in first daisy chain1And the second isolation module G2 comprises a1 st sampling processing unit M in a first daisy chain1And 2 nd sampling processing unit M2Line between, 2 nd sampling processing unit M in first daisy chain2And a3 rd sampling processing unit M3… … between and the nth sample processing unit M in the first daisy chainNAnd a secondIsolating the lines between modules G2.
Similar to the failure of line A1, when the second isolation module G2 and the Nth sampling processing unit M in the first daisy chainNIn the event of a single point of failure in line a3 between, the loop formed by the first daisy chain is broken. For example, the controller C may control the sampling processing module M to use the first isolation module G1 and the nth sampling processing unit M in the first daisy chain by managing an SPI communication interface which is connected to the first isolation module G1 by itself and communicates with the first daisy chainNAnd a plurality of lines between the battery packs transmit the state data of the plurality of battery cell units in the battery pack P to the controller C from bottom to top. Wherein, the first isolation module G1 and the Nth sampling processing unit M in the first daisy chainNThe plurality of lines therebetween includes: first isolation module G1 and 1 st sampling processing unit M in first daisy chain1Line between, the 1 st sampling processing unit M in the first daisy chain1And 2 nd sampling processing unit M2… … between and the N-1 th sampling processing unit M in the first daisy chainN-1And an Nth sampling processing unit MNThe lines in between.
That is, when the line a1 or A3 has a fault, the controller C may control the first daisy chain to adaptively change into a single-chain daisy chain for communication, so as to ensure that the controller C can receive the status data of all the cell units in the battery pack P, thereby improving the reliability of communication.
2. Similar to the failure of line A1, when the first isolation module G1 and the 1 st sampling processing unit M in the second daisy chain1In the event of a fault in the line B1 between, the loop formed by the second daisy chain is broken.
For example, the controller C may control the second isolation module G2 to transmit a second control command to each sampling processing unit through the second daisy chain by managing the SPI communication interface which is itself connected with the second isolation module G2 and in communication with the second daisy chain. The controller C controls the sampling processing module M to pass through the 1 st sampling processing unit M in the second daisy chain1And the second isolation module G2 communicate the first maximum value and the first minimum value to the controller. WhereinThe 1 st sampling processing unit M in the second daisy chain1And the second isolation module G2 includes: the 1 st sampling processing unit M in the second daisy chain1And 2 nd sampling processing unit M2Line between, 2 nd sampling processing unit M in second daisy chain2And a3 rd sampling processing unit M3… … between and the nth sample processing unit M in the second daisy chainNAnd a second isolation module G2.
That is, the Nth sampling processing unit M is transferred stepwise through the second daisy chainNThe first maximum value and the first minimum value of the status data of all the cell units of the battery pack P will be acquired, and the first maximum value and the first minimum value of the status data of all the cell units of the battery pack P will be transmitted to the controller C through the second isolation module G2.
Similar to the line A3 failure, when the second isolation module G2 and the Nth sampling processing unit M in the second daisy chainNIn the event of a failure of line B3 therebetween, for example, the controller C may control the first isolation module G1 to transmit a second control command to each sampling processing unit via the second daisy chain by managing the SPI communication interface itself connected to the first isolation module G1 and in communication with the second daisy chain. And controlling the sampling processing module M to pass through the first isolation module G1 and the Nth sampling processing unit M in the second daisy chainNThe plurality of lines therebetween transmit the first maximum value and the first minimum value to the controller C. Wherein, the first isolation module G1 and the Nth sampling processing unit M in the second daisy chainNThe plurality of lines therebetween includes: first isolation module G1 and 1 st sampling processing unit M in second daisy chain1Line between, the 1 st sampling processing unit M in the second daisy chain1And 2 nd sampling processing unit M2… …, and the nth-1 and nth sample processing units M in the second daisy chainNThe lines in between.
That is, the 1 st sampling processing unit M is transferred stage by stage through the second daisy chain1The first maximum value and the first minimum value of the state data of all the cell units of the battery pack P are acquired, and are passedThe first isolation module G1 transmits the first maximum value and the first minimum value of the status data of all the cell units of the battery pack P to the controller C.
That is, when the line B1 or the line B3 fails, the controller C may control the second daisy chain to adaptively change into a single-chain daisy chain for communication, so as to ensure that the controller C may receive the maximum value and the minimum value of the status data of all the cell units in the battery pack P, and improve the reliability of communication.
It should be mentioned that, when the first daisy chain can normally communicate, the controller C itself and the two SPI communication interfaces of the first daisy chain communication are respectively used for sending the first control instruction and receiving the collected data of the sampling processing module M. However, when the line a1 or A3 fails in the first daisy chain, the controller C has only one SPI communication interface capable of normally communicating with the first daisy chain, and can send the first control command to the sampling processing module M through the SPI communication interface and receive data transmitted from the sampling processing module M through the isolation module.
Similarly, when the line B1 or B3 fails in the second daisy chain, the controller C can send the second control command to the sampling processing module M or receive the data transmitted from the sampling processing module M through the isolation module by using only one SPI communication interface capable of normally communicating with the second daisy chain.
3. When a line a2 between the ith sampling processing unit and the (i + 1) th sampling processing unit in the first daisy chain has a fault, the controller C controls the 1 st sampling processing unit M not only by managing the SPI communication interface which is connected with the first isolation module G1 and communicates with the first daisy chain12 nd sampling processing unit M2… … and the ith sample processing unit transmits the 1 st sample processing unit M through a plurality of lines between the first isolation module G1 and the ith sample processing unit in the first daisy chain1And sending the state data of the plurality of battery cell units corresponding to the plurality of sampling processing units in the ith sampling processing unit to the controller C.
The controller C is also connected to the second isolation module G2 through its own management unit,And the SPI communication interface which communicates with the first daisy chain controls the (i + 1) th sampling processing unit and the (i + 2) th sampling processing unit … … N sampling processing unit MNTransmitting the (i + 1) th sampling processing unit to the Nth sampling processing unit M through a plurality of lines between the (i + 1) th sampling processing unit and the second isolation module G2 in the first daisy chainNAnd sending the state data of the plurality of battery cell units corresponding to the plurality of sampling processing units to a controller C, wherein i is a positive integer smaller than N.
Wherein, the plurality of lines between the first isolation module G1 and the ith sampling processing unit in the first daisy chain include: first isolation module G1 and 1 st sampling processing unit M in first daisy chain1Line between, the 1 st sampling processing unit M in the first daisy chain1And 2 nd sampling processing unit M2… … between, and the i-1 th sampling processing unit M in the first daisy chaini-1And the ith sampling processing unit MiThe lines in between.
The plurality of lines between the i +1 th sampling processing unit and the second isolation module G2 in the first daisy chain include: ith +1 th sampling processing unit M in first daisy chaini+1And the (i + 2) th sampling processing unit Mi+2The (i + 2) th sampling processing unit M in the first daisy chaini+2And the (i + 3) th sampling processing unit Mi+3… … between, and an nth sample processing unit M in the first daisy chainNAnd a second isolation module G2.
That is, when a single point of failure occurs in a line between any two adjacent sampling processing units in the first daisy chain, the controller C configures two SPI communication interfaces that communicate with the first daisy chain, and converts the first daisy chain having the ring-shaped communication circuit into two daisy chain single chains for communication. Therefore, communication interruption of the sampling circuit is avoided, and the reliability of the sampling circuit is improved.
Wherein, the 1 st sampling processing unit M1The state data of a plurality of battery cell units corresponding to a plurality of sampling processing units in the ith sampling processing unit is the 1 st sampling processing unit M12 nd sampling processing unit M2… … and the ith sampling processing unitAnd processing all state data of all the battery cell units in the unit.
Wherein, the (i + 1) th sampling processing unit to the Nth sampling processing unit MNThe state data of the multiple cell units corresponding to the multiple sampling processing units are the (i + 1) th sampling processing unit, the (i + 2) th sampling processing unit … …, the Nth sampling processing unit MNAnd waiting for all state data of all the electric core units in the N-i sampling processing units.
Similar to the failure of the line a2, when the line B2 between the ith sampling processing unit and the (i + 1) th sampling processing unit in the second daisy chain has a failure, the controller C controls the 1 st sampling processing unit M by managing the SPI communication interface which is connected to the first isolation module G1 and communicates with the second daisy chain12 nd sampling processing unit M2… … and ith sample processing unit MiTransmitting the 1 st sampling processing unit M through a plurality of lines between the first isolation module G1 and the ith sampling processing unit in the second daisy chain1To the ith sampling processing unit MiAnd sending the second maximum value and the second minimum value in the state data of the plurality of battery cell units corresponding to the plurality of sampling processing units to the controller C.
The controller C also controls the (i + 1) th and (i + 2) th sampling process units … … and the nth sampling process unit M by managing the SPI communication interface which is connected to the second isolation module G2 and communicates with the second daisy chainNTransmitting the (i + 1) th sampling processing unit to the Nth sampling processing unit M through a plurality of lines between the (i + 1) th sampling processing unit and a second isolation module G2 in a second daisy chainNAnd a third maximum value and a third minimum value in the state data of the plurality of battery cell units corresponding to the plurality of sampling processing units are sent to the controller C.
Wherein, the plurality of lines between the first isolation module G1 and the ith sampling processing unit in the second daisy chain include: the first isolation module G1 and the 1 st sampling processing unit M in the second daisy chain1Line between, the 1 st sampling processing unit M in the second daisy chain1And 2 nd sampling processing unit M2… … between, and the i-1 th sample processing unit in the second daisy chainA line between the element and the ith sample processing unit.
The plurality of lines between the i +1 th sampling processing unit and the second isolation module G2 in the second daisy chain include: the line between the (i + 1) th sampling processing unit and the (i + 2) th sampling processing unit in the second daisy chain, the line … … between the (i + 2) th sampling processing unit and the (i + 3) th sampling processing unit in the second daisy chain, and the (N) th sampling processing unit M in the second daisy chainNAnd a second isolation module G2.
For example, the controller C may process the 1 st sample processing unit M1The second maximum value and the second minimum value in the state data of all the electric core units corresponding to all the sampling processing units in the i sampling processing units such as the i-th sampling processing unit, and the (i + 1) -th sampling processing unit to the N-th sampling processing unit MNAnd comparing the third maximum value and the third minimum value in the state data of all the electric core units corresponding to all the sampling processing units in the battery pack P to obtain the first maximum value and the first minimum value in the state data of all the electric core units in the battery pack P.
That is, the larger value of the second maximum value and the third maximum value is the first maximum value, and the smaller value of the second minimum value and the third minimum value is the first minimum value.
That is, when a single point of failure occurs in a line between any two adjacent sampling processing units in the second daisy chain, the controller C configures two SPI communication interfaces for communication with the second daisy chain, and converts the second daisy chain having a ring-shaped communication circuit into two daisy chain single chains for communication. Therefore, communication interruption of the sampling circuit is avoided, and the reliability of the sampling circuit is improved.
It should be noted that, for the first daisy chain or the second daisy chain, when the sampling circuit is converted into two daisy chain single chains for communication, since ring communication is not performed any more, each of the two daisy chain single chains can send a control command and receive sampling data.
4. When the first isolation module G1 fails, the controller C passes through the same as the line a1 and the line B1, which are processed in the same manner as when the first isolation module G1 failsManaging two SPI communication interfaces connected with the second isolation module G2 and respectively communicating with the first daisy chain and the second daisy chain, and controlling the sampling processing module to pass through the 1 st sampling processing unit M in the first daisy chain1And the plurality of lines between the second isolation module G2 transmit the state data of the plurality of cell units in the battery pack P to the controller C; and controlling the sampling processing module to pass through the 1 st sampling processing unit M in the second daisy chain1And the second isolation module G2 to the controller C.
In some examples, when the second isolation module G2 fails, the controller C controls the sampling processing module M to pass through the first isolation module G1 and the nth sampling processing unit M in the first daisy chain by managing two SPI communication interfaces connected to the first isolation module G1 and respectively communicating with the first daisy chain and the second daisy chain, similar to the processing method when the line A3 and the line B3 fail at the same timeNThe state data of a plurality of battery cell units in the battery pack P are transmitted to the controller C through a plurality of lines; and controlling the sampling processing module to pass through the first isolation module G1 and the Nth sampling processing unit M in the second daisy chainNThe plurality of lines therebetween transmit the first maximum value and the first minimum value to the controller C.
5. When the controller C detects that a plurality of faults occur in the first daisy chain at the same time, for example, the line a1 and the line a2 fail at the same time, the controller C may control the sampling processing module M to transmit the status data of the plurality of battery cells in the battery pack P to the controller C through the second daisy chain. For example, the controller C may control the sampling processing module M to transmit the state data of the plurality of battery cells in the battery pack P to the controller C through the second daisy chain by controlling the SPI communication interface, which is connected to the first isolation module G1 and communicates with the second daisy chain.
In the embodiment of the invention, the annular daisy chain communication structure makes up the defects of the single-chain daisy chain, and when any part of the annular daisy chain fails, the single-chain daisy chain can be automatically formed to continuously complete communication, so that the reliability of daisy chain communication is greatly improved.
Fig. 3 shows a schematic diagram of a sampling circuit in further embodiments of the present invention. In contrast to fig. 2, the switching module K in fig. 3 is connected to the negative pole of the battery pack.
Fig. 4 shows a schematic diagram of a sampling circuit in further embodiments of the present invention. Unlike fig. 2, the switch module K in fig. 3 includes a switch cell K1 and a switch cell K2. The switch unit K1 is connected with the negative electrode of the battery pack, and the switch unit K2 is connected with the positive electrode of the battery pack. That is, the switch module K may be connected to the positive electrode of the battery pack or may be connected to the negative electrode of the battery pack. When the switching module K includes two switching units, the controller may transmit an off command to turn off at least one switching unit, and may also handle an abnormality of the battery pack.
Fig. 5 is a schematic flowchart illustrating a control method of a sampling circuit according to an embodiment of the present invention. As shown in fig. 5, a method for controlling a sampling circuit according to an embodiment of the present invention includes the following steps:
s510, the controller receives the first maximum value and the first minimum value transmitted through the second daisy chain.
S520, the controller judges whether the battery pack is abnormal or not according to the first maximum value and/or the first minimum value.
In the embodiment of the invention, after the controller receives the first maximum value and the first minimum value, whether the battery pack is abnormal or not can be judged according to the preset threshold value corresponding to the first maximum value and the first minimum value. The second daisy chain can rapidly transmit the first maximum value and the first minimum value, so that the timeliness of judging the abnormal condition of the battery pack can be improved.
In an embodiment of the present invention, the method for controlling the sampling circuit further includes:
s530, if the controller determines that the first maximum value is larger than a first preset threshold value and/or the first minimum value is smaller than a second preset threshold value, an opening instruction is sent to the switch module, and the switch module is controlled to be switched from a closed state to an open state so as to cut off a main loop where the battery pack is located.
When the controller finds that the first maximum value and/or the first minimum value reach the corresponding preset threshold value, the switch module is immediately controlled to be in a disconnected state, and therefore the problem caused by the abnormality of the battery pack is avoided.
In an embodiment of the present invention, the method for controlling the sampling circuit further includes:
and S540, if the first daisy chain has a plurality of faults, the controller controls the sampling processing module to transmit the state data of the plurality of battery cell units in the battery pack to the controller through the second daisy chain.
By using the second daisy chain as a standby link to transmit the state data of the plurality of cell units in the battery pack, the loss of the state data of all the cell units in the battery pack can be avoided, and the communication reliability of the sampling circuit is improved.
In an embodiment of the present invention, the control method of the sampling circuit further includes a control method when the first daisy chain or the second daisy chain has a single point fault and the first isolation module G1 or the second isolation module G2 has a fault, which may be referred to related descriptions of embodiments of the sampling circuit and will not be repeated herein.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As will be apparent to those skilled in the art, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (12)
1. A sampling circuit, the circuit comprising: the device comprises a sampling processing module, a controller, a first isolation module and a second isolation module, wherein the first isolation module and the second isolation module are connected with the controller; wherein the content of the first and second substances,
the first isolation module, the sampling processing module and the second isolation module are sequentially connected in series to form a first daisy chain, and the first isolation module, the sampling processing module and the second isolation module are sequentially connected in series to form a second daisy chain;
the sampling processing module is used for acquiring the state data of the plurality of electric core units in the battery pack and determining a first maximum value and a first minimum value in the acquired state data of the plurality of electric core units;
the first daisy chain is used for transmitting the state data of the plurality of battery cell units in the battery pack to the controller, and the second daisy chain is used for transmitting the first maximum value and the first minimum value to the controller;
the controller is used for judging whether the battery pack is abnormal or not based on the first maximum value and/or the first minimum value.
2. The circuit of claim 1, further comprising:
the switch module is respectively connected with the battery pack and the controller;
the controller is used for sending a disconnection instruction to the switch module when the first maximum value is larger than a first preset threshold value and/or the first minimum value is smaller than a second preset threshold value;
the switch module is used for switching from a closed state to an open state based on the open instruction so as to cut off a main loop where the battery pack is located.
3. The circuit of claim 2, wherein the switch module is connected to a positive pole of the battery pack and/or a negative pole of the battery pack.
4. The circuit of claim 1, wherein the controller is configured to control the sampling processing module to transmit the status data of the plurality of cell units in the battery pack to the controller via the second daisy-chain in the case that the first daisy-chain has a plurality of faults.
5. The circuit of claim 1, wherein the sampling processing module comprises a1 st sampling processing unit, a2 nd sampling processing unit … … N th sampling processing unit, the first isolation module, the 1 st sampling processing unit, the 2 nd sampling processing unit … …, the N th sampling processing unit and the second isolation module are sequentially connected in series to form the first daisy chain, and the first isolation module, the 1 st sampling processing unit, the 2 nd sampling processing unit … …, the N th sampling processing unit and the second isolation module are sequentially connected in series to form the second daisy chain;
each sampling processing unit is used for acquiring the state data of each electric core unit corresponding to the sampling processing unit in the battery pack;
the controller is configured to control the sampling processing module to transmit the state data of the plurality of cell units in the battery pack to the controller through a plurality of lines between the 1 st sampling processing unit and the second isolation module in the first daisy chain when a line between the first isolation module and the 1 st sampling processing unit in the first daisy chain has a fault;
the controller is configured to control the sampling processing module to transmit the state data of the plurality of battery cell units in the battery pack to the controller through a plurality of lines between the first isolation module and the nth sampling processing unit in the first daisy chain when a line between the second isolation module and the nth sampling processing unit in the first daisy chain fails.
6. The circuit of claim 5, wherein the controller is configured to control the sampling processing modules to transmit the first maximum value and the first minimum value to the controller via a plurality of lines between the 1 st sampling processing unit and the second isolation module in the second daisy-chain in the event of a failure of a line between the first isolation module and the 1 st sampling processing unit in the second daisy-chain;
the controller is configured to control the sampling processing modules to transmit the first maximum value and the first minimum value to the controller through a plurality of lines between the first isolation module and the nth sampling processing unit in the second daisy chain when a line between the second isolation module and the nth sampling processing unit in the second daisy chain fails.
7. The circuit of claim 5, wherein the controller is configured to, when a line between an ith sampling processing unit and an (i + 1) th sampling processing unit in the first daisy chain fails, control the 1 st sampling processing unit, the 2 nd sampling processing unit … … and the ith sampling processing unit to transmit status data of a plurality of cell units corresponding to the plurality of sampling processing units in the 1 st to ith sampling processing units to the controller through a plurality of lines between the first isolation module and the ith sampling processing unit in the first daisy chain;
and controlling the (i + 1) th sampling processing unit, the (i + 2) th sampling processing unit … … and the nth sampling processing unit to transmit state data of a plurality of battery cell units corresponding to the (i + 1) th sampling processing unit to the nth sampling processing unit to the controller through a plurality of lines between the (i + 1) th sampling processing unit and the second isolation module in the first daisy chain, wherein i is a positive integer smaller than N.
8. The circuit of claim 5, wherein the controller is configured to, in a case where a line between an ith sampling processing unit and an (i + 1) th sampling processing unit in the second daisy chain fails, control the 1 st sampling processing unit, the 2 nd sampling processing unit … …, and the ith sampling processing unit to transmit a second maximum value and a second minimum value of the state data of the plurality of cell units corresponding to the plurality of sampling processing units in the 1 st to ith sampling processing units to the controller through a plurality of lines between the first isolation module and the ith sampling processing unit in the second daisy chain;
and controlling an i +1 th sampling processing unit, an i +2 th sampling processing unit … … and the nth sampling processing unit to transmit a third maximum value and a third minimum value in state data of a plurality of battery cell units corresponding to a plurality of sampling processing units in the i +1 th sampling processing unit to the nth sampling processing unit to the controller through a plurality of lines between the i +1 th sampling processing unit and the second isolation module in the second daisy chain.
9. The circuit of claim 5, wherein the controller is configured to control the sampling processing module to transmit the status data of the plurality of cell units in the battery pack to the controller through a plurality of lines between the 1 st sampling processing unit and the second isolation module in the first daisy chain in case of a failure of the first isolation module; and controlling the sampling processing module to transmit the first maximum value and the first minimum value to the controller through a plurality of lines between the 1 st sampling processing unit and the second isolation module in the second daisy chain;
the controller is used for controlling the sampling processing module to transmit the state data of the plurality of battery cell units in the battery pack to the controller through a plurality of lines between the first isolation module and the Nth sampling processing unit in the first daisy chain under the condition that the second isolation module has a fault; and controlling the sampling processing modules to transmit the first maximum value and the first minimum value to the controller through a plurality of lines between the first isolation module and the Nth sampling processing unit in the second daisy chain.
10. A control method of a sampling circuit, applied to the sampling circuit according to claim 1, comprising:
the controller receiving the first maximum value and the first minimum value transmitted through the second daisy chain;
and the controller judges whether the battery pack is abnormal or not according to the first maximum value and/or the first minimum value.
11. The method of claim 10, wherein the sampling circuit further comprises: the switch module is respectively connected with the battery pack and the controller;
wherein the method further comprises:
if the controller determines that the first maximum value is larger than a first preset threshold value and/or the first minimum value is smaller than a second preset threshold value, an opening instruction is sent to the switch module, and the switch module is controlled to be switched from a closed state to an open state so as to cut off a main loop where the battery pack is located.
12. The method of claim 10, further comprising:
if a plurality of faults occur in the first daisy chain, the controller controls the sampling processing module to transmit the state data of the plurality of battery cell units in the battery pack to the controller through the second daisy chain.
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| CN201910142770.2A CN110967648A (en) | 2019-02-26 | 2019-02-26 | Sampling circuit and control method thereof |
| PCT/CN2020/075873 WO2020173352A1 (en) | 2019-02-26 | 2020-02-19 | Sampling circuit, and control method for same |
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| CN201910142770.2A CN110967648A (en) | 2019-02-26 | 2019-02-26 | Sampling circuit and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825794A (en) * | 2022-01-07 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Battery core sampling circuit, circuit fault early warning method and battery management system |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080180106A1 (en) * | 2007-01-31 | 2008-07-31 | Analog Devices, Inc. | Battery montoring apparatus and daisy chain interface suitable for use in a battery monitoring apparatus |
| CN101860053A (en) * | 2009-04-09 | 2010-10-13 | 福特环球技术公司 | Battery monitoring and control system and using method thereof |
| CN102806858A (en) * | 2011-05-31 | 2012-12-05 | 瑞萨电子株式会社 | Voltage monitoring system and voltage monitoring module |
| CN103500153A (en) * | 2013-09-06 | 2014-01-08 | 杭州协能科技有限公司 | Control-module-based serial communication framework of serial power supply device |
| CN104553852A (en) * | 2015-01-06 | 2015-04-29 | 重庆长安汽车股份有限公司 | Hybrid communication system of electric vehicle battery management system |
| CN104838522A (en) * | 2012-12-11 | 2015-08-12 | 罗伯特·博世有限公司 | Battery management system and battery system |
| CN105977558A (en) * | 2016-07-01 | 2016-09-28 | 欣旺达电动汽车电池有限公司 | Extensible hybrid battery management system |
| CN205863328U (en) * | 2016-07-01 | 2017-01-04 | 欣旺达电动汽车电池有限公司 | Extendible hybrid battery management system |
| US20170010329A1 (en) * | 2015-07-06 | 2017-01-12 | Panasonic Intellectual Property Management Co., Ltd. | Wakeup sequence for two-wire daisy chain communication system |
| CN206178019U (en) * | 2016-11-18 | 2017-05-17 | 安徽江淮汽车集团股份有限公司 | Battery monomer voltage acquisition circuit |
| CN206540956U (en) * | 2017-03-15 | 2017-10-03 | 安徽江淮汽车集团股份有限公司 | A kind of voltage acquisition system for battery pack framework |
| CN207683370U (en) * | 2017-12-08 | 2018-08-03 | 延锋伟世通电子科技（南京）有限公司 | A kind of cell management system of electric automobile based on daisy chain type cascade communication |
| CN207992310U (en) * | 2018-03-27 | 2018-10-19 | 宁波吉利汽车研究开发有限公司 | A kind of monomer voltage Acquisition Circuit |
| KR20190010003A (en) * | 2017-07-20 | 2019-01-30 | 현대오트론 주식회사 | Sensing chip, battery management system having the same, and operating method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1384305A4 (en) * | 2001-05-02 | 2005-11-09 | Microchip Tech Inc | Method and apparatus for high-voltage battery array monitoring sensors network |
| WO2010127257A1 (en) * | 2009-05-01 | 2010-11-04 | Analog Devices, Inc. | An addressable integrated circuit and method thereof |
| JP2010281717A (en) * | 2009-06-05 | 2010-12-16 | Yazaki Corp | Device for monitoring of voltage in a plurality of battery packs |
| US8515699B2 (en) * | 2009-07-02 | 2013-08-20 | Analog Devices, Inc. | Accuracy of battery monitor parts |
| JP4935893B2 (en) * | 2009-12-24 | 2012-05-23 | 株式会社デンソー | Battery abnormality determination device |
| CN104242358B (en) * | 2013-06-08 | 2016-07-06 | 中山职业技术学院 | A kind of electric automobile ferric phosphate lithium cell group tertiary management system |
| US20150102943A1 (en) * | 2013-10-10 | 2015-04-16 | Datang Nxp Semiconductors Co., Ltd. | Daisy-chain communication bus and protocol |
-
2019
- 2019-02-26 CN CN201910142770.2A patent/CN110967648A/en active Pending
-
2020
- 2020-02-19 WO PCT/CN2020/075873 patent/WO2020173352A1/en active Application Filing
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080180106A1 (en) * | 2007-01-31 | 2008-07-31 | Analog Devices, Inc. | Battery montoring apparatus and daisy chain interface suitable for use in a battery monitoring apparatus |
| CN101860053A (en) * | 2009-04-09 | 2010-10-13 | 福特环球技术公司 | Battery monitoring and control system and using method thereof |
| CN102806858A (en) * | 2011-05-31 | 2012-12-05 | 瑞萨电子株式会社 | Voltage monitoring system and voltage monitoring module |
| CN104838522A (en) * | 2012-12-11 | 2015-08-12 | 罗伯特·博世有限公司 | Battery management system and battery system |
| CN103500153A (en) * | 2013-09-06 | 2014-01-08 | 杭州协能科技有限公司 | Control-module-based serial communication framework of serial power supply device |
| CN104553852A (en) * | 2015-01-06 | 2015-04-29 | 重庆长安汽车股份有限公司 | Hybrid communication system of electric vehicle battery management system |
| US20170010329A1 (en) * | 2015-07-06 | 2017-01-12 | Panasonic Intellectual Property Management Co., Ltd. | Wakeup sequence for two-wire daisy chain communication system |
| CN105977558A (en) * | 2016-07-01 | 2016-09-28 | 欣旺达电动汽车电池有限公司 | Extensible hybrid battery management system |
| CN205863328U (en) * | 2016-07-01 | 2017-01-04 | 欣旺达电动汽车电池有限公司 | Extendible hybrid battery management system |
| CN206178019U (en) * | 2016-11-18 | 2017-05-17 | 安徽江淮汽车集团股份有限公司 | Battery monomer voltage acquisition circuit |
| CN206540956U (en) * | 2017-03-15 | 2017-10-03 | 安徽江淮汽车集团股份有限公司 | A kind of voltage acquisition system for battery pack framework |
| KR20190010003A (en) * | 2017-07-20 | 2019-01-30 | 현대오트론 주식회사 | Sensing chip, battery management system having the same, and operating method thereof |
| CN207683370U (en) * | 2017-12-08 | 2018-08-03 | 延锋伟世通电子科技（南京）有限公司 | A kind of cell management system of electric automobile based on daisy chain type cascade communication |
| CN207992310U (en) * | 2018-03-27 | 2018-10-19 | 宁波吉利汽车研究开发有限公司 | A kind of monomer voltage Acquisition Circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825794A (en) * | 2022-01-07 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Battery core sampling circuit, circuit fault early warning method and battery management system |
| CN115825794B (en) * | 2022-01-07 | 2023-11-17 | 宁德时代新能源科技股份有限公司 | Battery cell sampling circuit, circuit fault early warning method and battery management system |
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|---|---|
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