Communication module, communication system, battery pack, power system and automobile

Abstract

The utility model discloses a communication module, a communication system, a battery pack, a power system and an automobile. The communication module comprises a sampling module, a first power line carrier communication module, a first power line and a second power line, the first power line is used for connecting anodes of the cell units, and the second power line is used for connecting cathodes of the cell units; two ends of the sampling module are used for collecting sampling information corresponding to the battery cell unit; the two ends of the first power line carrier communication module are connected with the first power line and the second power line respectively, and the first power line carrier communication module is connected with the sampling module and used for transmitting sampling information corresponding to the battery cell units. Compared with a daisy chain communication mode, carrier signals are transmitted through a power line, the transmission path is firmer and more stable, the reliability is higher, the anti-interference performance is higher, the cost is relatively low, the transmission speed is higher, and communication faults caused by aging of low-voltage wires such as the daisy chain can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of communication transmission, and in particular to a communication module, a communication system, a battery pack, a power system and a car. Background Art

[0002] The existing communication system applied to the battery module generally includes a sampling module, which is connected to the battery module and is used to collect sampling information of the battery module; the sampling module communicates with the bridge chip in cascade via a daisy chain. This daisy chain communication method requires additional wiring, has low communication efficiency and reliability, and has a certain probability of disconnection, resulting in communication failure. Utility Model Content

[0003] The embodiments of the utility model provide a communication module, a communication system, a battery pack, a power system and a car to solve the problems of low efficiency, low reliability and high cost of the communication system on the existing battery module.

[0004] A communication module comprises a sampling module, a first power carrier communication module, a first power line and a second power line;

[0005] The first power line is used to connect the positive electrode of the battery cell unit, and the second power line is used to connect the negative electrode of the battery cell unit;

[0006] The two ends of the sampling module are used to collect sampling information corresponding to the battery cell unit;

[0007] Two ends of the first power carrier communication module are connected to the first power line and the second power line respectively. The first power carrier communication module is connected to the sampling module for transmitting sampling information corresponding to the battery cell unit.

[0008] Preferably, the communication module further includes a first power supply module;

[0009] The first power supply module is connected to the battery cell unit and the first power carrier communication module, and is used to convert the voltage output by the battery cell unit to supply power to the first power carrier communication module.

[0010] Preferably, the battery cell unit comprises at least two battery cells arranged in series;

[0011] The communication module further includes at least one battery cell sampling line, one end of each of the battery cell sampling lines is connected to two adjacent battery cells, and the other end of the battery cell sampling line is connected to the sampling module.

[0012] Preferably, the first power carrier communication module communicates with the sampling module through an interface.

[0013] Preferably, the interface includes an SPI interface, a UART interface and a serial interface.

[0014] A communication system, comprising a total positive power line, a total negative power line, a second power carrier communication module and the above communication module;

[0015] The total positive power line is used to connect the positive connection end of the battery module, and the total negative power line is used to connect the negative connection end of the battery module. The battery module includes one battery cell unit or at least two battery cell units arranged in series;

[0016] Each of the communication modules is connected to the positive electrode and the negative electrode of a battery cell unit, and is used to transmit the sampling information corresponding to the battery cell unit;

[0017] Two ends of the second power carrier communication module are respectively connected to the total positive power line and the total negative power line, and are used to transmit sampling information corresponding to the battery module.

[0018] Preferably, the battery module comprises at least two of the battery cell units arranged in series;

[0019] The communication system comprises at least two communication modules, each of which is connected to the positive electrode and the negative electrode of a battery cell;

[0020] The communication system also includes at least two first power supply modules, each of which is connected to a battery cell unit and a first power carrier communication module, and is used to convert the voltage output by the battery cell unit to supply power to the first power carrier communication module; or, the communication system also includes a second power supply module, which is connected to a power supply and at least two first power carrier communication modules, and is used to convert the voltage output by the power supply to supply power to at least two first power carrier communication modules.

[0021] Preferably, the communication system further comprises a main control module, which is connected to the second power carrier communication module and is used to connect to an external circuit.

[0022] A battery pack, comprising a battery module, wherein the battery module comprises at least one battery cell unit, and further comprises the above-mentioned communication module;

[0023] Each of the communication modules is connected to the positive electrode and the negative electrode of a battery cell unit and is used to transmit the sampling information corresponding to the battery cell unit.

[0024] Preferably, the battery module comprises at least two of the battery cell units arranged in series;

[0025] The battery pack includes at least two communication modules, each of which is connected to the positive electrode and the negative electrode of a battery cell unit;

[0026] The battery pack also includes at least two first power supply modules, each of which is connected to a battery cell unit and a first power carrier communication module, and is used to convert the voltage output by the battery cell unit to supply power to the first power carrier communication module; or, the battery pack also includes a second power supply module, which is connected to a power supply and at least two first power carrier communication modules, and is used to convert the voltage output by the power supply to supply power to at least two first power carrier communication modules.

[0027] A power system, comprising the above-mentioned battery pack, a total positive power line, a total negative power line and a second power carrier communication module;

[0028] The second power carrier communication module is arranged outside the battery pack;

[0029] One end of the total positive power line is connected to the positive electrode connection end of the battery module in the battery pack, and the other end of the total positive power line is connected to the second power carrier communication module;

[0030] One end of the total negative power line is connected to the negative electrode connection end of the battery module in the battery pack, and the other end of the total negative power line is connected to the second power carrier communication module.

[0031] Preferably, the power system further comprises a main control module, which is connected to the second power carrier communication module and is used to connect to an external circuit.

[0032] A car comprises the above-mentioned power system.

[0033] The above-mentioned communication modules, communication systems, battery packs, power systems and automobiles transmit carrier signals through power lines. Compared with the daisy chain communication method, the power line transmission path is stronger and more stable, more reliable, more anti-interference, and relatively low in cost. In addition, the power carrier has a faster transmission speed and can effectively avoid communication failures caused by aging of low-voltage wires such as daisy chains. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1This is a circuit diagram of a communication module in one embodiment of the utility model;

[0036] Figure 2 is a circuit diagram of a communication system in one embodiment of the utility model;

[0037] Figure 3 is another circuit diagram of a communication system in one embodiment of the utility model;

[0038] Figure 4 This is a circuit diagram of a power system in one embodiment of the utility model;

[0039] Figure 5 It is another circuit diagram of the power system in one embodiment of the utility model.

[0040] Among them, 1. battery module; 11. battery cell unit; 2. communication module; 21. sampling module; 22. first power carrier communication module; 23. first power line; 24. second power line; 25. first power module; 26. battery cell sampling line; 3. total positive power line; 4. total negative power line; 5. second power carrier communication module; 6. second power module; 7. main control module; 8. battery pack. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be understood that the utility model can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and fully convey the scope of the utility model to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0043] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. On the contrary, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0044] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0045] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0046] In order to thoroughly understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0047] The embodiment of the utility model provides a communication module 2, which is connected to the battery cell unit 11, and is used to connect the battery cell unit 11 and the external circuit, and can sample and detect the battery cell unit 11 according to the instructions output by the external circuit, and send the sampled sampling information to the external circuit. The battery cell unit 11 here may include one battery cell, or may include at least two battery cells connected in series.

[0048] In one embodiment, if Figure 1 As shown, the communication module 2 includes a sampling module 21, a first power carrier communication module 22, a first power line 23 and a second power line 24; the first power line 23 is used to connect the positive electrode of the battery cell unit 11, and the second power line 24 is used to connect the negative electrode of the battery cell unit 11; the two ends of the sampling module 21 are used to collect sampling information corresponding to the battery cell unit 11; the two ends of the first power carrier communication module 22 are respectively connected to the first power line 23 and the second power line 24, and the first power carrier communication module 22 is connected to the sampling module 21 for transmitting the sampling information corresponding to the battery cell unit 11.

[0049] Among them, the first power line 23 is a power line connected to the positive pole of the battery cell unit 11, and the second power line 24 is a power line connected to the negative pole of the battery cell unit 11. The power line is a high-voltage line. Compared with a low-voltage line such as a daisy chain, the transmission path formed based on the power line is stronger and more reliable.

[0050] Among them, the sampling module 21 is a module for implementing information sampling detection. As an example, the sampling module 21 includes a sampling chip and related peripheral circuits, which can collect information such as the voltage and temperature of the battery cell 11, and can also implement the battery balancing function according to the received instructions. In this example, the sampling module 21 can be directly connected to the two ends of the battery cell 11 to collect the sampling information corresponding to the battery cell 11; or, the sampling module 21 can be connected to the two ends of the battery cell 11 through the first power line 23 and the second power line 24 to collect the sampling information corresponding to the battery cell 11.

[0051] Among them, the first power carrier communication module 22 is a communication module formed based on the power carrier communication technology, specifically a power carrier communication module connected to the first power line 23 and the second power line 24. The power carrier communication module can use the existing power lines to transmit analog signals or digital signals at high speed through carriers. The transmission process does not require the network to be re-established. The existing power lines are used for carrier communication, which can reduce costs and ensure communication speed. As an example, the first power carrier communication module 22 may include but is not limited to coupling circuits, filtering circuits, modulation and demodulation circuits, etc., and specifically, existing circuits that implement corresponding functions can be used.

[0052] As an example, the high-voltage sampling interface of the sampling module 21 is connected to the positive electrode of the battery cell unit 11 through the first power line 23, and the low-voltage sampling interface of the sampling module 21 is connected to the negative electrode of the battery cell unit 11 through the second power line 24, so as to collect the sampling information of the battery cell unit 11. Correspondingly, the high-voltage carrier interface of the first power carrier communication module 22 is connected to the positive electrode of the battery cell unit 11 through the first power line 23, and the low-voltage carrier interface of the first power carrier communication module 22 is connected to the negative electrode of the battery cell unit 11 through the second power line 24. The first power carrier communication module 22 is also connected to the battery cell unit 11 and the external circuit. The specific communication process is as follows: the first power carrier communication module 22 sends the instruction sent by the external circuit to the sampling module 21, so that the sampling module 21 collects the sampling information of the battery cell unit 11, and sends the collected sampling information to the first power carrier communication module 22; the first power carrier communication module 22 modulates the received sampling information into a carrier signal, and then transmits the carrier signal to the external circuit through the power line to achieve the purpose of transmitting the sampling information.

[0053] In this embodiment, the sampling module 21 sends the collected sampling information to the first power carrier communication module 22. The first power carrier communication module 22 transmits the carrier signal through the power line. Compared with the daisy chain communication method, the power line transmission path is stronger and more stable, more reliable, more anti-interference, and relatively low in cost. In addition, the power carrier has a faster transmission speed, and can effectively avoid communication failures caused by aging of low-voltage wires such as daisy chains.

[0054] In one embodiment, if Figure 1 As shown, the communication module 2 also includes a first power module 25 , which is connected to the battery cell unit 11 and the first power carrier communication module 22 , and is used to convert the voltage output by the battery cell unit 11 to supply power to the first power carrier communication module 22 .

[0055] As an example, the communication module 2 further includes a first power supply module 25, which is connected to the first power carrier communication module 22 and supplies power to the first power carrier communication module 22 to ensure that the first power carrier communication module 22 realizes the power carrier function. The first power supply module 25 here can be understood as a power supply module that supplies power to a first power carrier communication module 22, and is used to convert the received voltage to provide the first power carrier communication module 22 with a power supply voltage that meets its working requirements.

[0056] In this example, the first power supply module 25 is connected to the battery cell unit 11 and the first power carrier communication module 22, and can step down the voltage at both ends of the battery cell unit 11 to provide the first power carrier communication module 22 with a supply voltage that meets its working requirements, thereby realizing local power supply and avoiding the need to introduce additional power supply, which is conducive to reducing costs.

[0057] In one embodiment, if Figure 1 As shown, the battery cell unit 11 includes at least two battery cells arranged in series; the communication module 2 also includes at least one battery cell sampling line 26, one end of each battery cell sampling line 26 is connected to two adjacent battery cells, and the other end of the battery cell sampling line 26 is connected to the sampling module 21.

[0058] As an example, when the battery cell unit 11 includes at least two battery cells arranged in series, the communication module 2 also includes at least one battery cell sampling line 26, one end of each of the battery cell sampling lines 26 is connected to two adjacent battery cells, and the other end of the battery cell sampling line 26 is connected to the sampling module 21. The first power line 23, at least one battery cell sampling line 26 and the second power line 24 can be used to collect the voltage, temperature and other information corresponding to any battery cell in the battery cell unit 11 to ensure the integrity and comprehensiveness of the collected sampling information.

[0059] In one embodiment, the first power carrier communication module 22 communicates with the sampling module 21 through an interface.

[0060] As an example, the first power carrier communication module 22 communicates with the sampling module 21 through an interface without the need for additional wiring, which can avoid wiring costs and communication failures caused by wire aging, thereby ensuring communication efficiency and reliability.

[0061] In one embodiment, the interface includes an SPI interface, a UART interface and a serial interface.

[0062] As an example, the first power carrier communication module 22 communicates with the sampling module 21 via an SPI interface, a UART interface or a serial interface to ensure communication efficiency and reliability between the two.

[0063] The embodiment of the utility model provides a communication system, which is connected to a battery module 1, and is used to connect the battery module 1 and an external circuit, and can perform sampling detection on the battery module 1 according to the instructions output by the external circuit, and send the collected sampling information corresponding to the battery module 1 to the external circuit. The battery module 1 includes at least one battery cell unit 11, for example, the battery module 1 can include one battery cell unit 11, and can also include at least two battery cell units 11 arranged in series.

[0064] In one embodiment, if Figure 2 and Figure 3 As shown, the communication system includes a total positive power line 3, a total negative power line 4, a second power carrier communication module 5 and the communication module 2 in the above embodiment; the total positive power line 3 is used to connect the positive connection end of the battery module 1, and the total negative power line 4 is used to connect the negative connection end of the battery module 1, and the battery module 1 includes a battery cell unit 11 or at least two battery cell units 11 arranged in series; each of the communication modules 2 is connected to the positive and negative electrodes of a battery cell unit 11, and is used to transmit the sampling information corresponding to the battery cell unit 11; the two ends of the second power carrier communication module 5 are respectively connected to the total positive power line 3 and the total negative power line 4, and are used to transmit the sampling information corresponding to the battery module 1.

[0065] As an example, the communication system is connected to the battery module 1. When the battery module 1 includes a battery cell 11, the positive connection end of the battery module 1 is the connection end corresponding to the positive electrode of the battery cell 11 for connecting to an external circuit, and the negative connection end of the battery module 1 is the connection end corresponding to the negative electrode of the battery cell 11 for connecting to an external circuit; when the battery module 1 includes at least two battery cells 11 arranged in series, the positive connection end and the negative connection end of the battery module 1 are the connection end corresponding to the positive electrode of the first battery cell 11 and the connection end corresponding to the negative electrode of the last battery cell 11, respectively. The total positive power line 3 is a power line connected to the positive connection end of the battery module 1, and the total negative power line 4 is a power line connected to the negative connection end of the battery module 1.

[0066] Among them, the second power carrier communication module 5 is another communication module formed based on the power carrier communication technology, specifically a power carrier communication module connected to the total positive power line 3 and the total negative power line 4. As an example, the second power carrier communication module 5 and the first power carrier communication module 22 in each communication module 2 mutually transmit and modulate data, and the second power carrier communication module 5 is also used to communicate with the external circuit, can receive the instruction output by the external circuit, and send the collected sampling information corresponding to the battery module 1 to the external circuit.

[0067] As an example, the positive connection terminal and the negative connection terminal of the battery module 1 are respectively connected to the total positive power line 3 and the total negative power line 4, and the battery module 1 includes at least one battery cell unit 11 arranged in series, and a first power carrier communication module 22 is arranged between the positive and negative poles of each battery cell unit 11, so that at least one first power carrier communication module 22 is arranged in series between the total positive power line 3 and the total negative power line 4, and carrier communication can be performed through the total positive power line 3 and the total negative power line 4; and the two ends of the second power carrier communication module 5 are respectively connected to the total positive power line 3 and the total negative power line 4, and carrier communication can also be performed through the total positive power line 3 and the total negative power line 4, providing a hardware basis for the first power carrier communication module 22 and the second power carrier communication module 5 to mutually carry and modulate and demodulate data. In this example, the working process of the communication system connected to the battery module 1 is as follows:

[0068] (1) The second power carrier communication module 5 receives instructions from the external circuit, modulates the instructions into a first carrier signal, transmits the first carrier signal to both ends of the battery module 1 through the total positive power line 3 and the total negative power line 4, and then transmits it to the first power carrier communication module 22 using the first power line 23 and the second power line 24 in each communication module 2.

[0069] (2) Each first power carrier communication module 22 demodulates the first carrier signal output by the second power carrier communication module 5 to obtain a demodulated instruction, and sends the instruction to the corresponding sampling module 21 so that the sampling module 21 collects sampling information corresponding to the battery cell unit 11.

[0070] (3) The first power carrier communication module 22 can receive the sampling information corresponding to the battery cell 11 collected by the sampling module 21, modulate the sampling information into a second carrier signal, and transmit the second carrier signal to the total positive power line 3 and the total negative power line 4 through the first power line 23 and the second power line 24, and then transmit it to the second power carrier communication module 5 through the total positive power line 3 and the total negative power line 4.

[0071] (4) The second power carrier communication module 5 demodulates the second carrier signal output by the first power carrier communication module 22 to obtain the sampling information corresponding to the demodulated battery module 1, and sends the sampling information to the external circuit to complete the process of communicating with the external circuit.

[0072] In this embodiment, a total positive power line 3 and a total negative power line 4 are respectively arranged at both ends of the battery module 1; in the battery module 1, each battery cell 11 is connected to the first power carrier communication module 22 through the first power line 23 and the second power line 24, so that at least one first power carrier communication module 22 is arranged in series between the total positive power line 3 and the total negative power line 4, so that it can mutually transmit, modulate and demodulate data with the second power carrier communication module 5 arranged between the total positive power line 3 and the total negative power line 4. In this example, the communication system can be connected to the external circuit through a second power carrier communication module 5 to collect and transmit the sampling information corresponding to the battery module 1, and ensure the reliability, stability and transmission speed of the data transmission. In addition, at both ends of the battery module 1, the total positive power line 3 and the total negative power line 4 are respectively connected to realize the high and low voltage separation of the battery module 1, so that it has stronger anti-interference ability to ensure its transmission reliability.

[0073] In one embodiment, the battery module 1 includes at least two battery cells 11 arranged in series, and the communication system includes at least two communication modules 2, each of which is connected to the positive and negative electrodes of one of the battery cells 11; Figure 2 As shown, the communication system further includes at least two first power supply modules 25, each of which is connected to one of the battery cells 11 and one of the first power carrier communication modules 22, and is used to convert the voltage output by the battery cell 11 to supply power to the first power carrier communication module 22; or Figure 3 As shown, the communication system also includes a second power supply module 6, which is connected to the power supply and at least two first power carrier communication modules 22, and is used to convert the voltage output by the power supply to supply power to at least two of the first power carrier communication modules 22.

[0074] As an example, when the battery module 1 includes at least two battery cells 11 arranged in series, the communication system includes at least two communication modules 2, each of which is provided with a first power carrier communication module 22, and the first power carrier communication module 22 is connected to the positive and negative electrodes of a battery cell 11, the communication system also includes at least two first power modules 25, each of which is connected to a first power carrier communication module 22, performs voltage conversion on the voltage output by the battery cell 11 connected thereto, and supplies power to the first power carrier communication module 22 separately, thereby ensuring the carrier communication effect of each first power carrier communication module 22. The first power module 25 here can be understood as a power module that supplies power to a first power carrier communication module 22.

[0075] As another example, when the battery module 1 includes at least two battery cells 11 arranged in series, the communication system includes at least two communication modules 2, each of which is provided with a first power carrier communication module 22, and the first power carrier communication module 22 is connected to the positive and negative electrodes of a battery cell 11, and the communication system further includes a power supply and a second power supply module 6, wherein the power supply here is a power supply for supplying power to the first power carrier communication module 22, which can be any one of at least one battery cell 11, or an additional power supply; the second power supply module 6 can be connected to the first power carrier communication module 22 in at least two communication modules 2 to supply power to at least two of the first power carrier communication modules 22, and specifically can receive the voltage output by any battery cell 11 or other external power supply, convert the received voltage, and provide the at least two first power carrier communication modules 22 with a power supply voltage that meets their working requirements, which can effectively reduce the number of power supply modules, thereby reducing costs. The second power supply module 6 here can be understood as a power supply module for supplying power to at least two first power carrier communication modules 22.

[0076] In one embodiment, if Figure 2 and Figure 3 As shown, the communication system further includes a main control module 7, which is connected to the second power carrier communication module 5 and is used to connect to an external circuit.

[0077] As an example, the communication system further includes a main control module 7, which can be a single chip microcomputer for realizing communication control. In this example, the main control module 7 communicates with the external circuit, can receive the instruction sent by the external circuit, and send the instruction to the second power carrier communication module 5; the second power carrier communication module 5 modulates the instruction to form a carrier signal corresponding to the instruction, and transmits the carrier signal corresponding to the instruction to each first power carrier communication module 22 through the power line; the first power carrier communication module 22 demodulates the carrier signal corresponding to the instruction, and sends the demodulated instruction to the sampling module 21, so that the sampling module 21 collects sampling information; the first power carrier communication module 22 modulates the collected sampling information, and transmits the carrier signal corresponding to the sampling information to the second power carrier communication module 5 through the power line; the second power carrier communication module 5 demodulates the carrier signal corresponding to the sampling information, and sends the demodulated sampling information to the main control module 7, and the main control module 7 sends the sampling information to the external circuit to complete the communication interaction process with the external circuit.

[0078] In one embodiment, if Figure 4 and Figure 5As shown, a battery pack 8 is provided, which includes a battery module 1, and the battery module 1 includes at least one battery cell unit 11; it also includes the communication module 2 in the above embodiment; each of the communication modules 2 is connected to the positive and negative electrodes of one of the battery cells 11, and is used to transmit the sampling information corresponding to the battery cell unit 11.

[0079] As an example, the battery pack 8 includes a shell, a battery module 1 arranged in the shell, and the communication module 2 in the above embodiment, the battery module 1 includes a battery cell unit 11 or at least two battery cell units 11 arranged in series; each communication module 2 is connected to the positive and negative poles of a battery cell unit 11. Specifically, the communication module 2 includes a sampling module 21, a first power carrier communication module 22, a first power line 23 and a second power line 24; the first power line 23 and the second power line 24 are respectively connected to the positive and negative poles of the battery cell unit 11; the two ends of the sampling module 21 are respectively connected to the first power line 23 and the second power line 24 to collect sampling information of the battery cell unit 11; the two ends of the first power carrier communication module 22 are respectively connected to the first power line 23 and the second power line 24, and the first power carrier communication module 22 is also connected to the sampling module 21 and the external circuit, and can receive instructions output by the external circuit, and send the instructions to the sampling module 21, so that the sampling module 21 collects the sampling information of the battery cell unit 11; the first power carrier communication module 22 can also modulate the sampling information collected by the sampling module 21 into a carrier signal, and then transmit it to the external circuit through the power line to achieve the purpose of transmitting the sampling information.

[0080] In this embodiment, the battery module 1 in the battery pack 8 includes at least one battery cell unit 11, and the two ends of each battery cell unit 11 are connected to a first power carrier communication module 22 through a power line to communicate through the power line and transmit the sampling information of the battery cell units 11 corresponding to the two ends of the first power carrier communication module 22. Compared with the daisy chain communication method, the power line transmission path is stronger and more stable, more reliable, more anti-interference, and relatively low in cost. In addition, the power carrier has a faster transmission speed, and can effectively avoid communication failures caused by aging of low-voltage wires.

[0081] In one embodiment, the battery module 1 includes at least two battery cells 11 arranged in series; the battery pack 8 includes at least two communication modules 2, each of which is connected to the positive and negative electrodes of one of the battery cells 11; Figure 4 As shown, the battery pack 8 further includes at least two first power modules 25, each of which is connected to one of the battery cells 11 and one of the first power carrier communication modules 22, and is used to convert the voltage output by the battery cell 11 to supply power to the first power carrier communication module 22; or Figure 5As shown, the battery pack 8 also includes a second power supply module 6, which is connected to the power supply and at least two first power carrier communication modules 22, and is used to convert the voltage output by the power supply to supply power to at least two of the first power carrier communication modules 22.

[0082] As an example, when the battery module 1 includes at least two battery cells 11 arranged in series, the battery pack 8 includes at least two communication modules 2, each of which is provided with a first power carrier communication module 22, and the first power carrier communication module 22 is connected to the positive and negative electrodes of a battery cell 11, the battery pack 8 also includes at least two first power modules 25, each of which is connected to a first power carrier communication module 22, performs voltage conversion on the voltage output by the battery cell 11 connected thereto, and supplies power to the first power carrier communication module 22 separately, thereby ensuring the carrier communication effect of each first power carrier communication module 22. The first power module 25 here can be understood as a power module that supplies power to a first power carrier communication module 22.

[0083] As another example, when the battery module 1 includes at least two battery cells 11 arranged in series, the battery pack 8 includes at least two communication modules 2, and each communication module 2 is provided with a first power carrier communication module 22, and the first power carrier communication module 22 is connected to the positive and negative electrodes of a battery cell 11, the battery pack 8 also includes a power supply and a second power supply module 6, where the power supply is a power supply for supplying power to the first power carrier communication module 22, which can be any one of at least one battery cell 11, or an additional power supply; the second power supply module 6 can be connected to the first power carrier communication module 22 in at least two communication modules 2 to supply power to at least two of the first power carrier communication modules 22, and specifically can receive the voltage output by any battery cell 11 or other external power supply, convert the received voltage, and provide the at least two first power carrier communication modules 22 with a power supply voltage that meets their working requirements, which can effectively reduce the number of power supply modules, thereby reducing costs. The second power supply module 6 here can be understood as a power supply module for supplying power to at least two first power carrier communication modules 22.

[0084] In one embodiment, if Figure 4 and Figure 5As shown, a power system is provided, including the battery pack 8, the total positive power line 3, the total negative power line 4 and the second power carrier communication module 5 in the above-mentioned embodiment; the second power carrier communication module 5 is arranged outside the battery pack 8; one end of the total positive power line 3 is connected to the positive connection end of the battery module 1 in the battery pack 8, and the other end of the total positive power line 3 is connected to the second power carrier communication module 5; one end of the total negative power line 4 is connected to the negative connection end of the battery module 1 in the battery pack 8, and the other end of the total negative power line 4 is connected to the second power carrier communication module 5.

[0085] As an example, the power system includes a battery pack 8, a second power carrier communication module 5, a total positive power line 3 and a total negative power line 4. The battery pack 8 includes a shell and a battery module 1 and a communication module 2 arranged in the shell; the battery module 1 includes at least one battery cell 11, that is, it can include one battery cell 11, and can also include at least two battery cells 11 arranged in series. Each of the communication modules 2 is connected to both ends of a battery cell 11, and is used to transmit the sampling information corresponding to the battery cell 11, that is, the first power carrier communication module 22 in the communication module 2 is arranged in the shell of the battery pack 8. The second power carrier communication module 5 is arranged outside the shell of the battery pack 8.

[0086] In this example, one end of the total positive power line 3 extends into the battery pack 8 and is connected to the positive connection terminal of the battery module 1 in the battery pack 8, and the other end of the total positive power line 3 extends out of the battery pack 8 and is used to be connected to the second power carrier communication module 5 arranged outside the battery pack 8; accordingly, one end of the total negative power line 4 extends into the battery pack 8 and is connected to the negative connection terminal of the battery module 1 in the battery pack 8, and the other end of the total negative power line 4 extends out of the battery pack 8 and is used to be connected to the second power carrier communication module 5 arranged outside the battery pack 8. Since a first power carrier communication module 22 is provided at both ends of each battery cell unit 11 in the battery module 1, at least one first power carrier communication module 22 is arranged in series between the total positive power line 3 and the total negative power line 4, that is, a transmission path is formed between the total positive power line 3-at least one communication module 2 (first power line 23-first power carrier communication module 22-second power line 24)-total negative power line 4, so that at least one first power carrier communication module 22 in the battery pack 8 can perform carrier communication with the second power carrier communication module 5 arranged outside the battery pack 8 through a total positive power line 3 and a total negative power line 4, so as to ensure communication reliability, stability and transmission speed.

[0087] In one embodiment, if Figure 4 and Figure 5As shown, the power system further includes a main control module 7, which is connected to the second power carrier communication module 5 and is used to connect to an external circuit.

[0088] As an example, the power system also includes a main control module 7, which can be a single chip microcomputer for realizing communication control. In this example, the main control module 7 communicates with the external circuit, can receive the instruction sent by the external circuit, and send the instruction to the second power carrier communication module 5; the second power carrier communication module 5 modulates the instruction to form a carrier signal corresponding to the instruction, and transmits the carrier signal corresponding to the instruction to each first power carrier communication module 22 through the power line; the first power carrier communication module 22 demodulates the carrier signal corresponding to the instruction, and sends the demodulated instruction to the sampling module 21, so that the sampling module 21 collects sampling information; the first power carrier communication module 22 modulates the collected sampling information, and transmits the carrier signal corresponding to the sampling information to the second power carrier communication module 5 through the power line; the second power carrier communication module 5 demodulates the carrier signal corresponding to the sampling information, and sends the demodulated sampling information to the main control module 7, and the main control module 7 sends the sampling information to the external circuit to complete the communication interaction process with the external circuit.

[0089] An embodiment of the present invention provides a car, comprising the power system in the above embodiment.

[0090] In this example, the power system can transmit data through the transmission path formed by the power line and the power carrier communication module, which can effectively ensure the reliability, stability and transmission speed of the communication process.

[0091] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A communication module, characterized in that: It includes a sampling module, a first power carrier communication module, a first power line and a second power line; The first power line is used to connect the positive electrode of the battery cell unit, and the second power line is used to connect the negative electrode of the battery cell unit; The two ends of the sampling module are used to collect sampling information corresponding to the battery cell unit; Two ends of the first power carrier communication module are connected to the first power line and the second power line respectively. The first power carrier communication module is connected to the sampling module for transmitting sampling information corresponding to the battery cell unit.

2. The communication module according to claim 1, characterized in that: The communication module also includes a first power supply module; The first power supply module is connected to the battery cell unit and the first power carrier communication module, and is used to convert the voltage output by the battery cell unit to supply power to the first power carrier communication module.

3. The communication module according to claim 1, characterized in that: The battery cell unit comprises at least two battery cells arranged in series; The communication module further includes at least one battery cell sampling line, one end of each of the battery cell sampling lines is connected to two adjacent battery cells, and the other end of the battery cell sampling line is connected to the sampling module.

4. The communication module according to claim 1, characterized in that: The first power carrier communication module communicates with the sampling module through an interface.

5. The communication module according to claim 4, characterized in that: The interfaces include SPI interface, UART interface and serial interface.

6. A communication system, characterized in that: Comprising a total positive power line, a total negative power line, a second power carrier communication module and a communication module according to any one of claims 1 to 5; The total positive power line is used to connect the positive connection end of the battery module, and the total negative power line is used to connect the negative connection end of the battery module. The battery module includes one battery cell unit or at least two battery cell units arranged in series; Each of the communication modules is connected to the positive electrode and the negative electrode of a battery cell unit, and is used to transmit the sampling information corresponding to the battery cell unit; Two ends of the second power carrier communication module are respectively connected to the total positive power line and the total negative power line, and are used to transmit sampling information corresponding to the battery module.

7. The communication system according to claim 6, characterized in that: The battery module comprises at least two battery cell units arranged in series; The communication system comprises at least two communication modules, each of which is connected to the positive electrode and the negative electrode of a battery cell; The communication system also includes at least two first power supply modules, each of which is connected to a battery cell unit and a first power carrier communication module, and is used to convert the voltage output by the battery cell unit to supply power to the first power carrier communication module; or, the communication system also includes a second power supply module, which is connected to a power supply and at least two first power carrier communication modules, and is used to convert the voltage output by the power supply to supply power to at least two first power carrier communication modules.

8. The communication system according to claim 6, characterized in that: The communication system further includes a main control module, which is connected to the second power carrier communication module and is used to connect to an external circuit.

9. A battery pack, comprising a battery module, wherein the battery module comprises at least one battery cell unit, characterized in that: Also includes the communication module according to any one of claims 1 to 5; Each of the communication modules is connected to the positive electrode and the negative electrode of a battery cell unit and is used to transmit the sampling information corresponding to the battery cell unit.

10. The battery pack according to claim 9, characterized in that: The battery module comprises at least two battery cell units arranged in series; The battery pack includes at least two communication modules, each of which is connected to the positive electrode and the negative electrode of a battery cell unit; The battery pack also includes at least two first power supply modules, each of which is connected to a battery cell unit and a first power carrier communication module, and is used to convert the voltage output by the battery cell unit to supply power to the first power carrier communication module; or, the battery pack also includes a second power supply module, which is connected to a power supply and at least two first power carrier communication modules, and is used to convert the voltage output by the power supply to supply power to at least two first power carrier communication modules.

11. A power system, characterized in that: It comprises the battery pack according to any one of claims 9 to 10, a total positive power line, a total negative power line and a second power carrier communication module; The second power carrier communication module is arranged outside the battery pack; One end of the total positive power line is connected to the positive electrode connection end of the battery module in the battery pack, and the other end of the total positive power line is connected to the second power carrier communication module; One end of the total negative power line is connected to the negative electrode connection end of the battery module in the battery pack, and the other end of the total negative power line is connected to the second power carrier communication module.

12. The power system according to claim 11, characterized in that: The power system further includes a main control module, which is connected to the second power carrier communication module and is used to connect to an external circuit.

13. A car, characterized in that: A power system comprising any one of claims 11-12.

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