CN111169321A - Control method for automobile, battery pack and battery information acquisition system - Google Patents
Control method for automobile, battery pack and battery information acquisition system Download PDFInfo
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- CN111169321A CN111169321A CN201811329944.8A CN201811329944A CN111169321A CN 111169321 A CN111169321 A CN 111169321A CN 201811329944 A CN201811329944 A CN 201811329944A CN 111169321 A CN111169321 A CN 111169321A
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Abstract
The invention discloses a control method of an automobile, a battery pack and a battery information acquisition system, wherein the battery pack comprises: each battery module comprises N battery cores, wherein N is a positive integer; the battery pack comprises at least one information acquisition assembly connected with N battery cores, wherein the at least one information acquisition assembly provides M acquisition channels, M is a positive integer larger than N, the N acquisition channels in the at least one information acquisition assembly are connected with the N battery cores, and the M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels. The battery information acquisition system can improve the adaptability of the acquisition board, is suitable for battery modules with various voltage and temperature quantities, and is not limited to the quantity of voltage channels which is multiple of the quantity of single voltage acquisition channels of the information acquisition assembly.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a battery pack, a control method of a battery information acquisition system and an automobile.
Background
The solution of the battery capture board in the related art mainly depends on the capture chip, i.e. the analog front end. According to the scheme of each current large chip manufacturer, the cell unit voltage is usually acquired by a plurality of main channels of each analog front end, 12 or 14 or 16 main channels are usually provided, the temperature of a cell module is acquired by a few auxiliary channels, and the analog front end can normally work after all the main channels of the analog front end are powered. Each battery collecting board can be provided with one or more analog front ends, and if one battery collecting board is provided with a plurality of analog front ends, the analog front ends are usually communicated in a daisy chain manner to transmit control signals and data. Therefore, the standard number of voltage collecting channels of each battery collecting plate is usually multiple of the main channel of one collecting chip, and the number of the total collecting single voltage channels of the battery pack is determined and needs to be multiple of the main channel of one collecting chip.
However, in practical use, the number of the single voltage channels to be collected is not necessarily a multiple of the main channel of a single collection chip, so that the number of battery cells of the battery pack or the selection of the module is limited.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a battery pack, which can improve the adaptability of the collecting board, and is suitable for battery modules with various voltage and temperature quantities, and is not limited to the number of voltage channels which is multiple of the number of single voltage collecting channels of the information collecting assembly.
The second objective of the present invention is to provide a control method for a battery information collecting system.
A third object of the invention is to provide a motor vehicle.
To achieve the above object, an embodiment of a first aspect of the present invention provides a battery pack, including: each battery module comprises N battery cores, wherein N is a positive integer; the battery pack comprises at least one information acquisition assembly connected with the N battery cores, wherein the at least one information acquisition assembly provides M acquisition channels, M is a positive integer larger than N, the N acquisition channels in the at least one information acquisition assembly are connected with the N battery cores, and the M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels.
According to the battery pack provided by the embodiment of the invention, at least one information acquisition assembly is connected with N battery cores, the at least one information acquisition assembly provides M acquisition channels, the N acquisition channels in the at least one information acquisition assembly are connected with the N battery cores, and the M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels. Therefore, the system can improve the adaptability of the acquisition board, is suitable for battery modules with various voltages and temperature numbers, and is not limited to the number of multiple voltage channels of the number of single voltage acquisition channels of the information acquisition assembly.
In addition, the battery pack proposed according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the first to the (N-1) th cells are respectively connected with the first to the (N-1) th acquisition channels, and the (N) th cell is connected with the (N-M) th acquisition channels.
According to one embodiment of the present invention, when the number of the information collecting components is Q, the number of the voltage collecting channels of each information collecting component is P, wherein P, Q is a positive integer, P x Q > N,
the number of acquisition channels connected with the battery cell in the 1 st to the mth information acquisition assemblies is as follows: p, wherein m is a positive integer which is greater than or equal to 1 and less than N/P;
the number of acquisition channels connected with the battery cell in the (m + 1) th to the (Q) th information acquisition assemblies is as follows: p- ((P x Q) -N)/(Q-m).
According to one embodiment of the present invention, the position of the 1 st to mth information collecting assemblies on the communication chain has priority over the m +1 th to qth information collecting assemblies.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides a method for controlling a battery information acquisition system, where the battery information acquisition system includes a plurality of battery modules to be acquired and at least one information acquisition assembly, and the method includes: acquiring the number of the battery cores of each battery module; the number of the battery cores is N; n is a positive integer; controlling the information acquisition assembly to be connected with the battery module according to the number of the battery cores, wherein the information acquisition assembly provides M acquisition channels, N acquisition channels are connected with the N battery cores, and M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels; and the information acquisition component M is a positive integer larger than N.
According to the control method of the battery information acquisition system, the number of the battery cells of each battery module is obtained, and the information acquisition assembly is controlled to be connected with the battery pack according to the number of the battery cells, wherein when the information acquisition assembly provides M acquisition channels in total, the N acquisition channels are connected with the N battery cells, and the M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels. Therefore, the method can improve the adaptability of the acquisition board, is suitable for battery modules with various voltage and temperature quantities, and is not limited to the quantity of voltage channels which is multiple of the quantity of single voltage acquisition channels of the information acquisition assembly.
In addition, the control method of the battery information acquisition system provided by the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the first to the (N-1) th cells are respectively connected with the first to the (N-1) th acquisition channels, and the (N) th cell is connected with the (N-M) th acquisition channels.
According to an embodiment of the present invention, when the number of the information collecting assemblies is Q, the number of the voltage collecting channels of each information collecting assembly is P, wherein P, Q is a positive integer, and P × Q > N; the controlling the information acquisition assembly to be connected with the battery pack according to the number of the battery cells comprises the following steps: dividing the Q information acquisition components into two groups according to the number of the battery cores and the information acquisition components, and acquiring the number of acquisition channels connected with the battery cores in each group of information acquisition components; the number of acquisition channels connected with the battery cell in the 1 st to the mth information acquisition assemblies is as follows: p, wherein m is a positive integer which is greater than or equal to 1 and less than N/P; the number of acquisition channels connected with the battery cell in the (m + 1) th to the (Q) th information acquisition assemblies is as follows: p- ((P x Q) -N)/(Q-m).
According to an embodiment of the present invention, the control method of the battery information collecting system further includes: and acquiring signals returned by each acquisition channel in the information acquisition assembly, packaging the signals returned by the information acquisition assembly and sending the packaged signals to a Battery Management System BMS (Battery Management System).
According to an embodiment of the present invention, the control method of the battery information collecting system further includes: acquiring the number of acquisition channels with the signal physical value of zero, and judging that a fault occurs if the number of the acquisition channels with the signal physical value of zero is greater than M-N, wherein if the acquisition channels with the signal physical value of zero do not belong to the (N + 1) th to the (M) th acquisition channels, the acquisition channels are prompted to have the fault.
In order to achieve the above object, a third embodiment of the present invention provides an automobile, which includes the above battery pack, wherein the automobile is an electric automobile.
According to the automobile provided by the embodiment of the invention, the adaptability of the acquisition board can be improved through the battery pack, the battery pack is suitable for battery modules with various voltage and temperature quantities, and the number of voltage channels is not limited to the number which is multiple of the number of single voltage acquisition channels of the information acquisition assembly.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block schematic diagram of a battery pack according to one embodiment of the invention;
fig. 2 is an electrical schematic diagram of a battery pack according to a specific example of the present invention;
fig. 3 is a block schematic diagram of a battery pack according to another embodiment of the invention;
FIG. 4 is a data transmission architecture diagram of a battery information acquisition system according to one embodiment of the present invention; and
FIG. 5 is a flow diagram of a battery information acquisition system according to a specific example of the present invention;
fig. 6 is a flowchart of a control method of a battery information collection system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A battery information collection system and an automobile having the same according to embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a block schematic diagram of a battery pack according to an embodiment of the present invention.
As shown in fig. 1, a battery pack according to an embodiment of the present invention may include: a plurality of battery module 10, with N at least one information acquisition subassembly 20 that electric core links to each other.
Each battery module 10 may include N battery cells, where N is a positive integer, such as battery cell 1, battery cell 2, …, and battery cell N. The at least one acquisition and collection assembly 20 provides M acquisition channels in total, such as acquisition channel 1, acquisition channel 2, …, acquisition channel N +1, …, and acquisition channel M, where M is a positive integer greater than N, where N acquisition channels in the at least one acquisition and collection assembly 20 are connected to N electrical cores, and M-N acquisition channels are connected to at least one of the N acquisition channels simultaneously.
In one embodiment of the invention, the first to the (N-1) th cells are respectively connected with the first to the (N-1) th acquisition channels, and the Nth cell is connected with the (N-M) th acquisition channels. For example, as shown in fig. 2, when N is 8 and M is 12, the first to seventh cells are respectively connected to the first to seventh acquisition channels, and the eighth cell is connected to the eighth to twelfth acquisition channels.
It should be noted that the information collecting component 20 refers to a minimum circuit for collecting the cell voltage and the module temperature, and may generally include a collecting chip and its peripheral circuits. The number of single voltage acquisition channels of the information acquisition module 20 is equal to the number of main channels of the acquisition chip, and is usually 12, 14, 16, and the like.
The design of the invention comprises a hardware part and a software part, wherein the hardware part comprises: the number of the information acquisition components connected with each acquisition board is different, and each acquisition board is connected with one information acquisition component and a plurality of information acquisition components.
According to an embodiment of the present invention, when the number of the information acquisition components 20 is Q, the number of voltage acquisition channels of each information acquisition component is P, where P, Q is a positive integer, P × Q > N, and the number of acquisition channels connected to the battery cell in the 1 st to m information acquisition components is: p, wherein m is a positive integer which is greater than or equal to 1 and less than N/P; the number of acquisition channels connected with the battery cell in the (m + 1) th to the (Q) th information acquisition assemblies is as follows: p- ((P x Q) -N)/(Q-m).
Further, according to an embodiment of the present invention, the position of the 1 st to mth information collecting assemblies on the communication chain has priority over the m +1 th to qth information collecting assemblies.
Specifically, when each acquisition board includes a plurality of information acquisition assemblies 20, it is assumed that the number of one information acquisition is M (the number of battery cells of the battery pack to be acquired is N), and N is greater than or equal to 1 and less than or equal to M. The first N channels of the information acquisition assembly 20, each channel is connected to a set of electric cores connected in parallel, the M-N th to M th channels are directly connected to any one of the N channels (for example, the N th channel), and these connections are all realized by wire harness connection, so that the normal power supply for the information acquisition assembly is realized, and the N +1 th to M th channel are prevented from being suspended on the acquisition chip.
For example, one information acquisition assembly 20 acquires 8 electric cores (N is 8), and the number of single voltage acquisition channels of the information acquisition assembly 20 is 12(P is 12). The number of acquisition channels connected with the battery cell in the 1 st information acquisition assembly is as follows: as shown in fig. 2, each of the 1 to 8 channels of the information acquisition component 20 is connected to a group of electric cores connected in parallel, and the 9 th to 12 th channels are directly connected to the 8 th channel through a wire harness, so that normal power supply to the information acquisition component is realized.
When each acquisition board is connected with a plurality of information acquisition assemblies, the acquisition number is uniformly distributed behind each information acquisition assembly and is preferentially distributed to the information acquisition assemblies which are close to the front on the communication chain. Preferably, the difference between the collection numbers of every two information collection assemblies is not more than 1, and the electrical connection design of each information collection assembly is the same as that of a single information collection assembly.
For example, each acquisition board is connected to 3 information acquisition components (Q ═ 3), the number of single voltage acquisition channels of the information acquisition components is 12(P ═ 12), and when the total number of required acquisition cores is 25(N ═ 25), then, when m ═ 2, the number of acquisition channels connected to the electrical core in the 1 st to 2 nd information acquisition components is: 12; the 3 rd information acquisition component is: 1. that is to say, the cell voltages are collected by the 1 st to 12 th channels of the 1 st to 2 nd information collection assemblies and the 1 st channel of the 3 rd information collection assembly.
When m is 1, the number of acquisition channels connected with the battery core in the 1 st information acquisition assembly is as follows: 12; the number of the acquisition channels connected with the battery core in the 2 nd to 3 rd information acquisition assemblies is respectively as follows: 7 and 6, or 6 and 7, respectively. That is to say, the cell voltages are acquired by the 1 st to 12 th channels of the 1 st information acquisition assembly, the 1 st value 7 channel of the 2 nd information acquisition assembly and the 1 st to 6 th channels of the 3 rd information acquisition assembly.
In addition, when the phase difference between the acquisition numbers of every two information acquisition assemblies is not more than 1, the number of acquisition channels connecting the 1 st information acquisition assembly with the battery cell is as follows: 9, the number of the acquisition channels connecting the 2 nd to the 3 rd information acquisition assemblies with the battery core is: 8 of the Chinese medicinal herbs.
It should be noted that, when the number of the information acquisition components is n, the number of the acquisition channels connecting the 1 st information acquisition component and the electric core is prior to the number of the acquisition channels connecting the 2 nd to nth information acquisition components and the electric core may be distributed according to actual conditions, for example, the number of the acquisition channels connecting the 2 nd information acquisition component and the electric core may be greater than the number of the acquisition channels connecting the 3 rd information acquisition component and the electric core, the number of the acquisition channels connecting the 3 rd information acquisition component and the electric core may be greater than the number of the acquisition channels connecting the 4 th information acquisition component and the electric core, …, and the number of the acquisition channels connecting the n-1 st information acquisition component and the electric core may be greater than the number of the acquisition channels connecting the nth information acquisition component and the electric core.
Therefore, on the hardware circuit, in the information acquisition assembly realized on the wire harness, a plurality of voltage acquisition channels which can be connected without the electric core are connected to the channel which has the highest number of electric core connection and is connected with the information acquisition assembly, so that the normal power supply for the information acquisition assembly is realized, and the influence of the channel which is connected without the electric core and is suspended on the acquisition chip is avoided. And, collection board strong adaptability can be applicable to the group battery of multiple voltage and temperature quantity, need not confine to the multiple voltage channel quantity of the monomer voltage acquisition channel number of information acquisition subassembly, when the group battery carries out electric core and module selection, the degree of freedom is bigger, and in addition, when the group battery carries out the module and arranges, need not consider a certain position excessively and must arrange the electric core side by side of the multiple group of the monomer voltage acquisition channel number of information acquisition subassembly, as long as there is the space just can arrange electric core.
It should be noted that the embodiment shown in fig. 1 is only an example of the present invention, and M-N acquisition channels are connected to any one of the nth acquisition channels, which is not described in detail herein.
In some embodiments of the present invention, as shown in fig. 3, the battery pack may further include: acquisition board 30, acquisition board 30 may include at least one information acquisition component 20. The collecting board 30 is further configured to send a configuration instruction to the at least one information collecting component 20, where the configuration instruction includes a collecting channel opening number corresponding to the at least one information collecting component 20.
According to an embodiment of the present invention, as shown in fig. 3, the collecting plate 30 may further include: and the fault detector 31 is configured to obtain the number of acquisition channels with a signal physical value of zero according to the obtained signal returned by each acquisition channel in the information acquisition component 20, and determine that a fault occurs if the number of acquisition channels with a signal physical value of zero is greater than M-N.
According to an embodiment of the present invention, as shown in fig. 3, the collecting plate 30 may further include: and the fault prompter 32 is used for judging whether the acquisition channel with the signal physical value of zero belongs to the (N + 1) th to (Mth) acquisition channels or not, and if not, prompting that the acquisition channel has a fault.
In one embodiment of the present invention, the collecting board 30 is further used for packaging and transmitting the data signals returned by the information collecting assembly 20 to the battery management system BMS.
Specifically, after the acquisition board 30 sends a configuration instruction of acquiring the number of channel openings to at least one information acquisition component 20, the acquisition board 30 automatically allocates the number of cell voltages and battery temperatures acquired by each information acquisition component, allocates which channels to acquire, how many frames of messages need to be sent (for master-slave), how large data volume is transmitted to the application layer (for master-slave motherboard and centralized type), and realizes self-adaptation on software to send out messages of corresponding number (including cell voltages and battery pack temperatures).
Designing a software part: as shown in fig. 4, three layers of functions from the bottom layer to the service layer are respectively: an information acquisition component in the complex driving layer acquires an original analog-to-digital conversion value function in a data register, and a reading signal of an Electronic Control Unit (ECU) abstraction layer performs a numerical value conversion processing function and a message packing and sending function of a service layer. In order to keep the compatibility of special design and general technology, the invention only modifies the function of the service layer, thereby ensuring the minimum modification amount and reducing the probability of software error.
Specifically, in the software implementation, first, whether a signal indicating that the number of acquisition channels is changed is received is checked. If yes, modifying the number of voltage and temperature channels required to be acquired by each information acquisition component 20 according to the number of the received channels; and if not, normally using all the default battery cell and battery pack temperature acquisition channels.
Secondly, the information acquisition component 20 starts to acquire temperature data of the electric core and the battery pack, performs numerical value conversion, converts the acquired initial analog-to-digital conversion into an original hexadecimal number, calculates gain and offset, and converts the original hexadecimal number into physical values such as an integer voltage value or a temperature value.
Suppose that the number of voltage channels collected by one information collection component 20 is N, where N is greater than or equal to 1 and less than or equal to M. The normally received signal physical values of the first N channels of the information acquisition component 20 should not be 0, and the signal physical values of the N +1 th to M-th channels are 0, that is, the signal physical values of M-N channels are 0. If the fault detector 31 detects that the number of channels with the signal physical value of 0 is greater than M-N, the short-circuit fault of the channel with the signal physical value of 0 in the first N channels is diagnosed, and the fault is prompted by the fault prompter 32, recorded and sent to the strategy layer software.
And finally, according to the number of the temperature channels of the battery core and the battery pack, which need to be acquired by each information acquisition assembly 20, packing the physical value signals into data frames, and sending the data frames to a main board of the master-slave BMS or policy level software of the centralized BMS.
Therefore, in software design, only the software code of the service layer is modified, and other layers and application layers of the bottom layer software are not modified, so that the influence of the modification of the number of the battery cells on the software is reduced, and the reliability is improved. And the software is compatible with the common situation, and the quick adaptive self-adjustment of the battery pack can be realized through setting or calibrating a value.
As shown in fig. 5, the specific steps of the software implementation are as follows:
and S101, initializing.
And S102, task scheduling.
S103, the information acquisition assembly acquires voltage and temperature.
And S104, converting the acquired numerical value into a physical value.
And S105, judging whether the acquisition channel number change signal is received or not. If yes, go to step S108; if not, step S106 is performed.
And S106, acquiring by using all channels of each default information acquisition component.
And S107, performing data packing on all the information acquisition signals, and executing S111.
And S108, calculating and modifying the number of channels required to be acquired by each information acquisition component.
And S109, judging whether a channel has a short-circuit fault.
And S110, packing data according to the number of the signals acquired by each information acquisition component.
And S111, sending the data to a mainboard or an application layer.
And S112, recording faults.
In summary, according to the battery pack of the embodiment of the present invention, at least one information acquisition component is connected to N battery cells, the at least one information acquisition component provides M acquisition channels, the N acquisition channels in the at least one information acquisition component are connected to the N battery cells, and the M-N acquisition channels are simultaneously connected to at least one of the first to nth acquisition channels. Therefore, the system can improve the adaptability of the acquisition board, is suitable for battery modules with various voltages and temperature numbers, and is not limited to the number of multiple voltage channels of the number of single voltage acquisition channels of the information acquisition assembly.
Fig. 6 is a flowchart of a control method of a battery information collection system according to an embodiment of the present invention. In one embodiment of the invention, the battery information acquisition system comprises a plurality of battery modules needing to be acquired and at least one information acquisition assembly.
As shown in fig. 6, the control method of the battery information acquisition system according to the embodiment of the present invention may include the following steps:
s1, obtaining the number of battery cores of each battery module; the number of the battery cores is N; n is a positive integer;
s2, controlling the information acquisition assembly to be connected with the battery module according to the number of the battery cells, wherein the information acquisition assembly provides M acquisition channels, N acquisition channels are connected with N battery cells, and M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels; the information acquisition component M is a positive integer larger than N.
According to one embodiment of the invention, the first to the (N-1) th cells are respectively connected with the first to the (N-1) th acquisition channels, and the (N) th cell is connected with the (N-M) th acquisition channels.
According to an embodiment of the present invention, when the number of the information collecting assemblies is Q, the number of the voltage collecting channels of each information collecting assembly is P, wherein P, Q is a positive integer, and P × Q > N; according to electric core quantity, control information acquisition subassembly is connected with the battery module, includes: dividing the Q information acquisition components into two groups according to the number of the battery cores and the information acquisition components, and acquiring the number of acquisition channels connected with the battery cores in each group of the information acquisition components; wherein, the number of the acquisition channels connected with the battery core in the 1 st to the mth information acquisition assemblies is as follows: p, wherein m is a positive integer which is greater than or equal to 1 and less than N/P; the number of acquisition channels connected with the battery cell in the (m + 1) th to the (Q) th information acquisition assemblies is as follows: p- ((P x Q) -N)/(Q-m).
According to an embodiment of the present invention, the control method of the battery information collecting system further includes: and acquiring signals returned by each acquisition channel in the information acquisition assembly.
According to an embodiment of the present invention, the control method of the battery information collecting system further includes: acquiring the number of acquisition channels with the signal physical value of zero, and if the number of acquisition channels with the signal physical value of zero is greater than M-N, judging that a fault occurs.
According to an embodiment of the present invention, after determining that a fault occurs, the method further includes: and judging whether the acquisition channel with the signal physical value of zero belongs to the (N + 1) th to the Mth acquisition channels, and if not, prompting that the acquisition channel fails.
According to an embodiment of the present invention, the control method of the battery information collecting system further includes: and packaging the signals returned by the information acquisition assembly and sending the signals to a battery management system BMS.
It should be noted that, for details that are not disclosed in the control method of the battery information acquisition system according to the embodiment of the present invention, please refer to details that are disclosed in the battery pack according to the embodiment of the present invention, and details are not described herein again.
According to the control method of the battery information acquisition system, the number of the battery cores of the battery module is obtained, and the information acquisition assembly is controlled to be connected with the battery module according to the number of the battery cores, wherein when the information acquisition assembly provides M acquisition channels in total, the N acquisition channels are connected with the N battery cores, and the M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels. Therefore, the method can improve the adaptability of the acquisition board, is suitable for battery packs with various voltages and temperature numbers, and is not limited to the number of voltage channels which is multiple of the number of single voltage acquisition channels of the information acquisition assembly.
In addition, the embodiment of the invention also provides an automobile which comprises the battery pack. In one embodiment of the present invention, the vehicle may be an electric vehicle.
According to the automobile provided by the embodiment of the invention, the adaptability of the acquisition board can be improved through the battery information acquisition system, the automobile is suitable for battery packs with various voltage and temperature quantities, and the number of voltage channels is not limited to the number which is multiple of the number of single voltage acquisition channels of the information acquisition assembly.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A battery pack, comprising:
each battery module comprises N battery cores, wherein N is a positive integer;
the at least one information acquisition assembly is connected with the N battery cores and provides M acquisition channels, wherein M is a positive integer larger than N, the N acquisition channels in the at least one information acquisition assembly are connected with the N battery cores, and the M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels.
2. The battery pack of claim 1, wherein the first through N-1 th cells are connected to the first through N-1 th acquisition channels, respectively, and the nth cell is connected to the N through M acquisition channels.
3. The battery pack according to claim 1, wherein when the number of the information collecting members is Q, the number of the voltage collecting channels of each information collecting member is P, wherein P, Q is a positive integer, P x Q > N,
the number of acquisition channels connected with the battery cell in the 1 st to the mth information acquisition assemblies is as follows: p, wherein m is a positive integer which is greater than or equal to 1 and less than N/P;
the number of acquisition channels connected with the battery cell in the (m + 1) th to the (Q) th information acquisition assemblies is as follows: p- ((P x Q) -N)/(Q-m).
4. The battery pack according to claim 3, wherein the 1 st to mth information collecting components are located in preference to the m +1 st to qth information collecting components on the communication chain.
5. A control method of a battery information acquisition system is characterized in that the battery information acquisition system comprises a plurality of battery modules needing to be acquired and at least one information acquisition assembly, and the method comprises the following steps:
acquiring the number of battery cores of each battery module; the number of the battery cores is N; n is a positive integer;
controlling the information acquisition assembly to be connected with the battery module according to the number of the battery cores, wherein the information acquisition assembly provides M acquisition channels, N acquisition channels are connected with the N battery cores, and M-N acquisition channels are simultaneously connected with at least one of the N acquisition channels; and the information acquisition component M is a positive integer larger than N.
6. The method of claim 5, wherein the first to N-1 th cells are respectively connected to the first to N-1 th acquisition channels, and the Nth cell is connected to the Nth to M-th acquisition channels.
7. The control method of the battery information collection system according to claim 6, wherein when the number of the information collection components is Q, the number of the voltage collection channels of each information collection component is P, wherein P, Q is a positive integer, and P x Q > N;
according to electric core quantity, control the information acquisition subassembly with the battery module is connected, include:
dividing the Q information acquisition components into two groups according to the number of the battery cores and the information acquisition components, and acquiring the number of acquisition channels connected with the battery cores in each group of information acquisition components;
the number of acquisition channels connected with the battery cell in the 1 st to the mth information acquisition assemblies is as follows: p, wherein m is a positive integer which is greater than or equal to 1 and less than N/P; the number of acquisition channels connected with the battery cell in the (m + 1) th to the (Q) th information acquisition assemblies is as follows: p- ((P x Q) -N)/(Q-m).
8. The control method of the battery information collection system according to claim 7, further comprising:
and acquiring signals returned by each acquisition channel in the information acquisition assembly, packaging the signals returned by the information acquisition assembly and sending the packaged signals to a Battery Management System (BMS).
9. The control method of the battery information collection system according to claim 8, further comprising:
acquiring the number of acquisition channels with the signal physical value of zero, and judging that a fault occurs if the number of the acquisition channels with the signal physical value of zero is greater than M-N, wherein if the acquisition channels with the signal physical value of zero do not belong to the (N + 1) th to the (M) th acquisition channels, the acquisition channels are prompted to have the fault.
10. An automobile comprising the battery pack according to any one of claims 1 to 4, wherein the automobile is an electric automobile.
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