Battery cell monitoring unit

Abstract

The utility model discloses a battery cell monitoring unit, the battery cell monitoring unit comprises a preset analog front-end chip module and an interface conversion module, the analog front-end chip module comprises a preset analog front-end chip, the analog front-end chip comprises a plurality of pins, different pins are used for collecting different external voltage signals, and the interface conversion module is connected with the analog front-end chip module. And the number of versions of the cell control units is reduced through the preset analog front-end chip. The conversion interface module is used for identifying the position of each external voltage signal, and connecting the pins with the external voltage signals according to the external voltage signals corresponding to the plurality of pins and the position of each external voltage signal. Therefore, the external voltage signals are correctly connected with the pins of the analog front-end chip through the conversion interface module, and the same analog front-end chip can be connected with the external voltage signals corresponding to various batteries respectively. Therefore, through the arrangement of the interface conversion module, the same analog front-end chip can be adapted to various batteries, the development and verification time is shortened, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a cell monitoring unit. Background Technique

[0002] Connect the battery to a cell monitoring unit (CMU) so that the CMU can correctly collect various voltage signals of the battery to monitor data such as the voltage and temperature of the cells in the battery.

[0003] Currently, with the continuous development of electric vehicles, etc., users' demand for battery multi-power is becoming increasingly rich. The richness of battery power has brought about the diversification of the arrangement of cells and the number of cells in the battery pack. With the diversification of the arrangement of cells and the number of cells in the battery pack, the generated voltage signals are also diverse. The cell monitoring unit needs to be correctly connected to various voltage signals of the battery to correctly monitor various voltage signals.

[0004] In related technologies, in order to correctly connect various voltage signals, different cell monitoring units are designed for different cell arrangements and the number of cells, resulting in an increasing number of versions of the cell monitoring unit. For example, n cell arrangements and m numbers of cells will generate n×m test schemes, so n×m cell monitoring units are required to test them.

[0005] However, the above method brings a large number of heavy development tasks and test tasks, resulting in a long development and verification time and high costs. Summary of the Utility Model

[0006] In view of the above problems, the present application provides a cell monitoring unit for shortening the development and verification time and reducing costs.

[0007] Based on this, the embodiments of the present application disclose the following technical solutions:

[0008] On the one hand, the embodiments of the present application provide a cell monitoring unit, which includes an analog front-end chip module and an interface conversion module;

[0009] The analog front-end chip module includes a preset analog front-end chip, and the analog front-end chip includes multiple pins, and different pins are used to collect different external voltage signals;

[0010] The interface conversion module is used to identify the positions of the respective external voltage signals, and connect the multiple pins to the respective external voltage signals according to the external voltage signals corresponding to the multiple pins and the positions of the respective external voltage signals.

[0011] Optionally, the analog front-end chip module corresponds to a plurality of the interface conversion modules, and different interface conversion modules are used to match different battery types, where the battery types are determined based on the cell arrangement and the number of cells.

[0012] Optionally, the cell monitoring unit further includes a detection module;

[0013] The detection module is configured to detect the battery type of the target battery, determine the interface conversion module corresponding to the target battery according to the battery type of the target battery, and form the cell monitoring unit by combining the interface conversion module corresponding to the target battery with the analog front-end chip module.

[0014] Optionally, the battery types include a first type, a second type, and a third type;

[0015] Among them, the arrangement mode of the external voltage signals corresponding to the batteries belonging to the first type is different from the arrangement mode of the external voltage signals corresponding to the multiple pins included in the analog front-end chip;

[0016] The number of external voltage signals corresponding to the batteries belonging to the second type is less than the number of pins included in the analog front-end chip, and the arrangement mode of the external voltage signals corresponding to the batteries belonging to the second type is the same as the arrangement mode of the external voltage signals corresponding to the multiple pins included in the analog front-end chip;

[0017] The number of external voltage signals corresponding to the batteries belonging to the third type is less than the number of pins included in the analog front-end chip, and the arrangement mode of the external voltage signals corresponding to the batteries belonging to the third type is different from the arrangement mode of the external voltage signals corresponding to the multiple pins included in the analog front-end chip.

[0018] Optionally, if it is determined by the detection module that the number of external voltage signals corresponding to the target battery is i, the number of pins included in the analog front-end chip is j, and i is less than j, then the interface conversion module is further configured to select j - i external voltage signals from the external voltage signals corresponding to the target battery, and connect the j - i external voltage signals to j - i target pins included in the analog front-end chip, where the external voltage signals corresponding to the target pins are different from the external voltage signals corresponding to the target battery.

[0019] Optionally, the interface conversion module is configured to connect the external voltage signals corresponding to the target pin and the adjacent pins.

[0020] Optionally, the interface conversion module includes an identification sub-module and a connection sub-module;

[0021] The recognition sub-module is used to recognize the positions of the external voltage signals and send the positions of the external voltage signals to the connection sub-module.

[0022] The connection sub-module is used to connect the pins and the external voltage signals according to the external voltage signals corresponding to the multiple pins respectively and the positions of the external voltage signals.

[0023] The advantages of the above technical solution of the present application are as follows:

[0024] The battery cell monitoring unit includes a preset analog front-end chip module and an interface conversion module. The analog front-end chip module includes a preset analog front-end chip, and the analog front-end chip includes multiple pins, and different pins are used to collect different external voltage signals. Thus, the pin arrangement of the analog front-end chip is no longer designed based on the arrangement of battery cells and the number of battery cells in the battery pack, but the version number of the battery cell control unit is reduced by the preset analog front-end chip. The conversion interface module is used to recognize the positions of the external voltage signals and connect the pins and the external voltage signals according to the external voltage signals corresponding to the multiple pins respectively and the positions of the external voltage signals. Thus, the external voltage signals are correctly connected to the pins of the analog front-end chip through the conversion interface module, and the same analog front-end chip can be connected to the external voltage signals corresponding to multiple batteries. Therefore, by setting the interface conversion module in the battery cell monitoring unit, the same analog front-end chip can be adapted to multiple batteries, the development and verification time is shortened, and the cost is reduced. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of a battery cell monitoring unit provided by an embodiment of the present application;

[0027] Figure 2 It is a schematic diagram of an analog front-end chip module provided by an embodiment of the present application;

[0028] Figure 3 It is a schematic diagram of an interface conversion module provided by an embodiment of the present application;

[0029] Figure 4 It is a schematic diagram of an interface conversion module provided by an embodiment of the present application;

[0030] Figure 5Schematic diagram of an interface conversion module provided by an embodiment of the present application. Detailed implementation manners

[0031] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] The following will be combined with Figure 1 , to introduce a battery cell monitoring unit provided by an embodiment of the present application. Refer to Figure 1 , this figure is a schematic diagram of a battery cell monitoring unit provided by an embodiment of the present application. The battery cell monitoring unit includes an analog front-end chip module 110 and an interface conversion module 120. Each module will be described separately below.

[0033] The analog front-end chip module 110 includes a preset analog front end (AFE) chip, that is, a chip pre-set in the battery cell monitoring unit, which will not change with the arrangement of battery cells and the number of battery cells in the battery pack, thereby reducing the number of versions of the battery cell monitoring unit, and further reducing the development tasks and test tasks. In addition, the analog front-end chip includes multiple pins, and different pins are used to collect different external voltage signals. For example, different voltage signals from the same battery are collected.

[0034] Refer to Figure 2 , this figure is a schematic diagram of an analog front-end chip module provided by an embodiment of the present application. In Figure 2 , the analog front-end chip module includes two analog front-end chips, namely AFE chip 1 and AFE chip 2. Each AFE chip has n pins for collecting n kinds of external voltage signals.

[0035] The interface conversion module 120 is used to identify the positions of each external voltage signal, and connect multiple pins to each external voltage signal respectively according to the external voltage signals corresponding to the multiple pins and the positions of each external voltage signal.

[0036] As a possible implementation manner, the analog front-end chip module corresponds to multiple interface conversion modules, and different interface conversion modules are used to match different battery types, where the battery type is determined based on the arrangement of battery cells and the number of battery cells. Thus, batteries of different battery types can be connected to the analog front-end chip module through the interface conversion module corresponding to the battery type, so that batteries of different battery types can be connected to the same analog front-end chip module.

[0037] As a possible implementation, in order to ensure that the same analog front-end chip module can adapt to as many battery types as possible, it can include as many pins as possible, so as to collect different external voltage signals through different pins, and then adapt to more battery types.

[0038] As a first possible implementation, the battery cell monitoring unit may further include a detection module, which is configured to detect the type of the target battery, determine the interface conversion module corresponding to the target battery according to the type of the target battery, and form a battery cell monitoring unit by combining the interface conversion module corresponding to the target battery with the analog front-end chip module.

[0039] Wherein, the target battery is the battery to be connected to the analog front-end chip module, or the battery waiting to be detected by the battery cell monitoring unit. By detecting the type of the target battery through the detection module, the corresponding interface conversion module can be determined so that it can be correctly connected to the analog front-end chip module.

[0040] The embodiments of the present application do not specifically limit the battery types, and those skilled in the art can set them according to actual needs. Hereinafter, three battery types will be taken as examples for illustration.

[0041] (1) The first type.

[0042] The arrangement of the external voltage signals corresponding to the battery belonging to the first type is different from the arrangement of the external voltage signals corresponding to the analog front-end chip including multiple pins.

[0043] In this case, the interface conversion module identifies the positions of the external voltage signals, and respectively connects the multiple pins to the external voltage signals according to the external voltage signals respectively corresponding to the multiple pins and the positions of the external voltage signals.

[0044] See Figure 3 , which is a schematic diagram of an interface conversion module provided by an embodiment of the present application. In Figure 3 , the battery belonging to the first type includes n external voltage signals, and the analog front-end chip includes n pins, but the arrangement of the external voltage signals corresponding to the n pins is different from the arrangement of the n external voltage signals included in the battery belonging to the first type. After the interface conversion module identifies the positions of the n external voltage signals included in the battery belonging to the first type, it correspondingly connects the n pins to the n external voltage signals according to the external voltage signals respectively corresponding to the n pins and the positions of the n external voltage signals.

[0045] (2) The second type.

[0046] The number of external voltage signals corresponding to the batteries of the second type is less than the number of pins included in the analog front-end chip, and the arrangement of the external voltage signals corresponding to the batteries of the second type is the same as the arrangement of the external voltage signals corresponding to the multiple pins included in the analog front-end chip.

[0047] In this case, after identifying the positions of the respective external voltage signals, the interface conversion module can respectively connect the multiple pins to the respective external voltage signals according to the external voltage signals respectively corresponding to the multiple pins. The unconnected pins can be connected to any external voltage signal, or the battery cell monitoring unit further includes an analog signal module, and the unconnected pins are connected to the analog signal module, so that the analog signal module can provide an analog voltage signal to prevent the pins from floating.

[0048] See Figure 4 , which is a schematic diagram of an interface conversion module provided by an embodiment of the present application. In Figure 4 , the batteries of the first type include n - 1 external voltage signals, and the analog front-end chip includes n pins, that is, the numbers of the two are different, and the arrangement of the n - 1 external voltage signals included in the batteries of the first type is the same as the arrangement of the external voltage signals corresponding to the n - 1 pins.

[0049] As a possible implementation manner, if it is determined by the detection module that the number of external voltage signals corresponding to the target battery is i, the number of pins included in the analog front-end chip is j, and i is less than j, the interface conversion module is further configured to:

[0050] Select j - i external voltage signals from the external voltage signals corresponding to the target battery, and connect the j - i external voltage signals to j - i target pins included in the analog front-end chip. Among them, the external voltage signal corresponding to the target pin is different from the external voltage signal corresponding to the target battery.

[0051] As a possible implementation manner, the target pin can be connected to the external voltage signal corresponding to the adjacent pin.

[0052] Continue to refer to Figure 4 , the target battery does not have the external voltage signal corresponding to the nth pin. At this time, in order to prevent the nth pin from floating, the nth pin is connected to the (n - 1)th external voltage signal corresponding to the (n - 1)th pin.

[0053] (3) The third type.

[0054] The number of external voltage signals corresponding to the batteries of the third type is less than the number of pins included in the analog front-end chip, and the arrangement of the external voltage signals corresponding to the batteries of the third type is different from the arrangement of the external voltage signals corresponding to the multiple pins included in the analog front-end chip.

[0055] In this case, after identifying the positions of the respective external voltage signals, the interface conversion module can connect the multiple pins to the respective external voltage signals according to the external voltage signals respectively corresponding to the multiple pins. The unconnected pins can be connected to any external voltage signal, or the battery cell monitoring unit further includes an analog signal module, and the unconnected pins are connected to the analog signal module, so that the analog signal module can provide an analog voltage signal to prevent the pins from being floating.

[0056] See Figure 5 , which is a schematic diagram of an interface conversion module provided by an embodiment of the present application. In Figure 5 , the batteries belonging to the first type include n - 1 external voltage signals, and the analog front - end chip includes n pins, that is, their quantities are different, and the arrangement of the n - 1 external voltage signals included in the batteries belonging to the first type is different from the arrangement of the external voltage signals corresponding to the n - 1 pins. After the interface conversion module connects the external voltage signals to the corresponding pins respectively, the unconnected pins are connected to the external voltage signal corresponding to the nearest pin.

[0057] As a possible implementation manner, the interface conversion module includes an identification sub - module and a connection sub - module;

[0058] The identification sub - module is configured to identify the positions of the respective external voltage signals and send the positions of the external voltage signals to the connection sub - module;

[0059] The connection sub - module is configured to connect the pins to the external voltage signals according to the external voltage signals respectively corresponding to the multiple pins and the positions of the respective external voltage signals.

[0060] As can be seen from the above technical solutions, the battery cell monitoring unit includes a preset analog front - end chip module and an interface conversion module. The analog front - end chip module includes a preset analog front - end chip, and the analog front - end chip includes multiple pins, and different pins are used to collect different external voltage signals. Thus, instead of designing the pin arrangement of the analog front - end chip based on the arrangement of battery cells and the number of battery cells in the battery pack, the number of versions of the battery cell control unit is reduced by using a preset analog front - end chip. The conversion interface module is used to identify the positions of the respective external voltage signals and connect the pins to the external voltage signals according to the external voltage signals respectively corresponding to the multiple pins and the positions of the respective external voltage signals. Thus, the external voltage signals are correctly connected to the pins of the analog front - end chip through the conversion interface module, realizing that the same analog front - end chip can be connected to the external voltage signals respectively corresponding to multiple types of batteries. Therefore, by setting an interface conversion module in the battery cell monitoring unit, the same analog front - end chip can be adapted to multiple types of batteries, shortening the development and verification time and reducing the cost.

[0061] In addition, in practical applications, the development and verification of the CMU AFE chip and its peripheral circuits take a long time and are costly. After adopting the embodiments of the present application, there is no need to modify the analog front-end chip module including the AFE chip. Only the interface conversion module needs to be designed, and the design of the interface conversion module is relatively simple, with a relatively small development cost. Moreover, only one analog front-end chip module needs to be developed and verified. The subsequent new project requirements can be met by redesigning the interface conversion module, greatly reducing the development cost, shortening the development and verification time, and improving the competitiveness of the product.

[0062] It should be noted that the embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the systems or devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, reference can be made to the description in the method part.

[0063] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one) of the following" or its similar expression means any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a, b, and c", where a, b, and c can be single or multiple.

[0064] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0065] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell monitoring unit, characterized in that, The battery cell monitoring unit includes an analog front-end chip module and an interface conversion module; The analog front-end chip module includes a preset analog front-end chip, and the analog front-end chip includes multiple pins, and different pins are used to collect different external voltage signals; The interface conversion module is used to identify the positions of the respective external voltage signals, and connect the multiple pins to the respective external voltage signals according to the external voltage signals corresponding to the multiple pins and the positions of the respective external voltage signals.

2. The cell monitoring unit according to claim 1, wherein, The analog front-end chip module corresponds to multiple interface conversion modules, and different interface conversion modules are used to match different battery types, and the battery types are determined based on the battery cell arrangement and the number of battery cells.

3. The cell monitoring unit according to claim 2, wherein The battery cell monitoring unit further includes a detection module; The detection module is used to detect the battery type of the target battery, determine the interface conversion module corresponding to the target battery according to the battery type of the target battery, and form the battery cell monitoring unit by combining the interface conversion module corresponding to the target battery with the analog front-end chip module.

4. The cell monitoring unit according to claim 2, wherein The battery types include a first type, a second type, and a third type; Among them, the arrangement mode of the external voltage signals corresponding to the batteries belonging to the first type is different from the arrangement mode of the external voltage signals corresponding to the multiple pins included in the analog front-end chip; The number of external voltage signals corresponding to the batteries belonging to the second type is less than the number of pins included in the analog front-end chip, and the arrangement mode of the external voltage signals corresponding to the batteries belonging to the second type is the same as the arrangement mode of the external voltage signals corresponding to the multiple pins included in the analog front-end chip; The number of external voltage signals corresponding to the batteries belonging to the third type is less than the number of pins included in the analog front-end chip, and the arrangement mode of the external voltage signals corresponding to the batteries belonging to the third type is different from the arrangement mode of the external voltage signals corresponding to the multiple pins included in the analog front-end chip.

5. The cell monitoring unit according to claim 3, wherein If it is determined by the detection module that the number of external voltage signals corresponding to the target battery is i, the number of pins included in the analog front-end chip is j, and i is less than j, then the interface conversion module is further used to select j - i external voltage signals from the external voltage signals corresponding to the target battery, and connect the j - i external voltage signals to j - i target pins included in the analog front-end chip, and the external voltage signals corresponding to the target pins are different from the external voltage signals corresponding to the target battery.

6. The cell monitoring unit according to claim 5, characterized in that, The interface conversion module is used to connect the external voltage signals corresponding to the target pin and the adjacent pins.

7. The cell monitoring unit according to any one of claims 1-6, characterized in that, The interface conversion module includes an identification sub-module and a connection sub-module; The identification sub-module is used to identify the positions of the respective external voltage signals and send the positions of the external voltage signals to the connection sub-module; The connection sub-module is used to connect the pins to the external voltage signals according to the external voltage signals corresponding to the multiple pins and the positions of the respective external voltage signals.

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