Voltage acquisition device and system
By using switch devices and built-in short-circuit devices in the battery cell voltage acquisition system, adjacent battery cells share sampling lines, the problem of manual short-circuit operation and inaccurate sampling during the battery cell voltage acquisition is solved, and a higher Accuracy and easy operation.
Patent Information
- Application Number
- CN202420018586.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-03
AI Technical Summary
During the battery voltage acquisition process, the prior art requires manual short-circuiting of the sampling circuit of each single battery cell, which is troublesome and has the problem of inaccurate sampling.
By setting up a switch device in the data acquisition unit, a sampling line is shared between adjacent cells, and a short connection device is built into the data acquisition unit, the wiring harness for the voltage sampling of the battery cell is simplified and the dummy connection of the sampling line caused by manual operation is reduced.
It improves the accuracy of battery voltage acquisition, simplifies the operation process, and reduces sampling errors caused by human factors.
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Figure CN222355185U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of voltage acquisition, and in particular, to a voltage acquisition device and system. Background Art
[0002] In the new energy industry, the voltage information of each single cell that makes up the battery module is extremely important. Therefore, during the R&D test and production inspection stages, the voltage of each single cell needs to be measured and monitored through a cell voltage sampling device. At present, each sampling channel of the cell voltage sampling device is independent of each other. The sampling circuit of the positive electrode of the nth cell and the negative electrode of the n+1th cell is not short-circuited in advance according to the series connection characteristics of the cells in the battery module. Manual wire crimping is required later. The operation process is cumbersome and there is a possibility of false connection of the external wires, resulting in inaccurate sampling.
[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Utility Model Content
[0004] The embodiments of the present application provide a voltage acquisition device and system to at least solve the technical problem in the related art that when collecting the cell voltage, the sampling circuit between each single cell needs to be manually short-circuited, the operation process is cumbersome and there is inaccurate sampling.
[0005] According to one aspect of an embodiment of the present application, a voltage acquisition device is provided, comprising: a battery module, and a data acquisition unit, wherein a negative electrode of a first battery cell in the battery module is connected to a negative electrode of a first acquisition channel in the data acquisition unit through a first sampling line, and a positive electrode of the first battery cell is connected to a positive electrode of the first acquisition channel through a second sampling line, wherein other battery cells in the battery module except the first battery cell share a common sampling line with adjacent battery cells and are connected to an acquisition channel in the data acquisition unit, the battery cells in the battery module are connected in the same connection order, and a positive electrode of a last battery cell in the battery module is connected to a positive electrode of a target acquisition channel in the data acquisition unit through a target sampling line; and each acquisition channel in the data acquisition unit is connected through a switch device.
[0006] Optionally, the positive electrode of the first collection channel corresponding to the first battery cell is connected to the negative electrode of the second collection channel corresponding to the second battery cell in the battery module through the first switch device in the switch device, wherein the second battery cell is adjacent to the first battery cell.
[0007] Optionally, the negative electrode of the second battery cell is connected to the positive electrode of the first acquisition channel through the second sampling line, and the positive electrode of the second battery cell is connected to the positive electrode of the second acquisition channel in the data acquisition unit through the third sampling line.
[0008] Optionally, the number of acquisition channels in the data acquisition unit is not less than the number of battery cells in the battery module.
[0009] Optionally, the number of switch devices in the data acquisition unit is less than the number of acquisition channels in the data acquisition unit.
[0010] Optionally, the battery module includes a first battery module and a second battery module, the positive electrode of the tail battery cell in the first battery module is connected to the positive electrode of the first target acquisition channel in the data acquisition unit, and the negative electrode of the head battery cell in the second battery module is connected to the negative electrode of the second target acquisition channel in the data acquisition unit.
[0011] Optionally, the positive electrode of the first target collection channel and the negative electrode of the second target collection channel are connected or disconnected by a second switch device in the switch device.
[0012] Optionally, the battery module is composed of a plurality of battery cells connected in series.
[0013] According to another aspect of an embodiment of the present application, a voltage acquisition system is also provided, comprising: a voltage acquisition device, a data processing unit and a host computer, wherein the voltage acquisition device comprises a battery module and a data acquisition unit, the negative electrode of the first battery cell in the battery module is connected to the negative electrode of the first acquisition channel in the data acquisition unit through a first sampling line, and the positive electrode of the first battery cell is connected to the positive electrode of the first acquisition channel through a second sampling line, wherein other battery cells in the battery module except the first battery cell share a sampling line with the adjacent battery cells and are connected to the acquisition channel in the data acquisition unit, the battery cells in the battery module are connected in the same connection order, and the positive electrode of the last battery cell in the battery module is connected to the positive electrode of the target acquisition channel in the data acquisition unit through a target sampling line; each acquisition channel in the data acquisition unit is connected through a switch device; the data processing unit is connected to the data acquisition unit, wherein the data processing unit is used to receive and summarize the voltage data of the battery cells collected by the data acquisition unit; the host computer is connected to the data processing unit, wherein the host computer is used to receive the voltage data processed by the data processing unit and display the processing result of the voltage data.
[0014] Optionally, the data processing unit communicates with the host computer via a target bus or industrial Ethernet, wherein the target bus includes at least one of the following: an RS485 bus and a CAN bus.
[0015] In the embodiment of the present application, adjacent battery cells in the battery module share a sampling line connected to the data acquisition unit, and a switching device is provided between the acquisition channels corresponding to each adjacent battery cell, so as to achieve the purpose of measuring the voltage of different battery cells or battery modules according to the state of the switching device, thereby realizing the technical effect of improving the accuracy of voltage acquisition, and further solving the technical problem in the related art that when collecting the battery cell voltage, the sampling circuit between each single battery cell needs to be manually short-circuited, the operation process is cumbersome and there is a risk of inaccurate sampling. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0017] Figure 1 is a structural diagram of a voltage acquisition device according to an embodiment of the present application;
[0018] Figure 2 is a structural diagram of another voltage acquisition device according to an embodiment of the present application;
[0019] Figure 3 is a connection diagram of a voltage acquisition device according to an embodiment of the present application;
[0020] Figure 4 It is a structural diagram of a voltage acquisition system according to an embodiment of the present application. DETAILED DESCRIPTION
[0021] In order to enable those skilled in the art to better understand the 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 drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0023] When sampling the voltage of the battery cells, the related technology does not short-circuit the sampling circuits of the positive electrode of the nth battery cell and the negative electrode of the (n+1)th battery cell in advance according to the characteristics of the battery cells in series in the battery module, resulting in the problem of inaccurate sampling due to the external dotted line.
[0024] In order to solve the above problems, the present application provides a voltage acquisition device, such as Figure 1As shown, Figure 1 is a structural diagram of a voltage acquisition device according to an embodiment of the present application, Figure 1 According to the characteristics of single-cell series connection inside the battery module, the positive electrode of the n-1th cell is connected to the negative electrode of the nth cell, so the sampling channels Vn-1 and Vn of the cell voltage acquisition device share one sampling line. The positive electrode of the sampling channel Vn-1 is short-circuited with the negative electrode of the channel Vn inside the data acquisition unit through the short-circuit device, thereby simplifying the wiring harness for cell voltage sampling. On the other hand, since the acquisition device has a built-in short-circuit device, there is no need to manually make a short-circuit wire, reducing the virtual connection of the sampling line caused by human factors. The following is a detailed description.
[0025] exist Figure 1 In the voltage acquisition device shown in the figure, the device includes a single cell C, a short-circuit device, a data acquisition unit, a data processing unit and a host computer, wherein a plurality of single cells are connected in series to form a battery module, and the single cell can be, for example, Figure 1 C1, C2, C3...Cn in it.
[0026] Taking a single battery module as an example, the connection structure of the voltage acquisition device is described. When collecting voltage, the positive sampling line and the negative sampling line of the battery cell C1 are connected to the data acquisition unit respectively. Since the batteries are connected in series, adjacent batteries share one sampling line. Figure 1 In the example, C1 and C2 share a sampling line, C2 and C3 share a sampling line, and so on. Therefore, it is only necessary to connect the positive sampling lines of the cells C2, C3, ..., Cn to the data acquisition unit. The data acquisition unit includes multiple data acquisition channels, each of which is connected to a cell through a sampling line. For example, Figure 1 In the data acquisition unit, the positive and negative electrodes of the V1 channel are connected to the positive and negative electrodes of the battery cell C1 through the sampling line, the positive electrode of the V2 channel is connected to the positive electrode of the battery cell C2 through the sampling line, the positive electrode of the V3 channel is connected to the positive electrode of the battery cell C3 through the sampling line, and the positive electrode of the Vn channel is connected to the positive electrode of the battery cell Cn through the sampling line. A short-circuit device is built into the data acquisition unit, and the short-circuit device is used to connect adjacent data acquisition channels, for example, the positive electrode of the V1 channel is connected to the negative electrode of the V2 channel through the short-circuit device, the positive electrode of the V2 channel is connected to the negative electrode of the V3 channel through the short-circuit device, the positive electrode of the V3 channel is connected to the negative electrode of the V4 channel through the short-circuit device, and the positive electrode of the Vn-1 channel is connected to the negative electrode of the Vn channel through the short-circuit device.
[0027] Since the data acquisition unit is connected to the data processing unit, and the data processing unit is connected to the host computer, all the single cell voltage values collected by the data acquisition unit are summarized by the data processing unit and uploaded to the host computer. The host computer is used to calculate the data uploaded by the data processing unit and display all the single cell voltage values of the battery module, the single cell voltage extreme difference, the single cell voltage extreme value, the total pressure of the module, etc. When performing data communication, Figure 1 The voltage acquisition device shown supports RS485 bus, CAN bus and industrial Ethernet.
[0028] pass Figure 1 The voltage acquisition device shown not only simplifies the wiring harness for sampling the cell voltage, but also has a built-in short-circuit device in the data acquisition unit, eliminating the need to manually make short-circuit wires, thereby reducing the possibility of virtual connection of the sampling lines caused by human factors.
[0029] In another optional embodiment, in order to solve the technical problem that when collecting the cell voltage, the sampling circuit between each single cell needs to be manually short-circuited, the operation process is cumbersome and the sampling is inaccurate, the present application also provides another voltage collection device, such as Figure 2 shown.
[0030] Figure 2 2 is a structural diagram of another voltage acquisition device according to an embodiment of the present application, the voltage acquisition device includes: a battery module 20 and a data acquisition unit 22, wherein the negative electrode of the first battery cell 201 in the battery module 20 is connected to the negative electrode of the first acquisition channel 203 in the data acquisition unit 22 through the first sampling line 202, and the positive electrode of the first battery cell 201 is connected to the positive electrode of the first acquisition channel 203 through the second sampling line 204, wherein the other battery cells except the first battery cell 201 in the battery module 20 share a sampling line with the adjacent battery cells and are connected to the acquisition channel in the data acquisition unit 22, the battery cells in the battery module are connected in the same connection order, and the positive electrode of the last battery cell in the battery module is connected to the positive electrode of the target acquisition channel in the data acquisition unit through the target sampling line. For example, in Figure 2 In the first battery module 210, the battery cell 212 is the last battery cell in the above battery module, the sampling line connected to the positive electrode of the battery cell 212 is the above target sampling line, and the collection channel 213 connected to the target sampling line is the above target collection channel; each collection channel in the data collection unit is connected by a switch device.
[0031] Specifically, according to Figure 3 The example pairs in Figure 2 The connection structure of the voltage acquisition device shown in FIG. Figure 3In the embodiment, a single cell C, switch devices S1 to Sn-1, a data acquisition unit, a data processing unit and a host computer are included, wherein the single cells are connected in series, and a plurality of single cells form a battery module, such as battery module 1, battery module 2, etc. The cells in each battery module are connected in series in the same connection order, wherein the connection order of the cells is, for example, connected in sequence of the negative electrode first and then the positive electrode, that is, the positive electrode of the nth cell is connected to the negative electrode of the n+1th cell, wherein n≥1, n+1≤N, and N is the number of all cells in each battery module.
[0032] When collecting voltage, the positive sampling line and the negative sampling line of the battery cell C1 are respectively connected to the data access collection unit. Since the battery cells are connected in series, adjacent battery cells can share one sampling line. Therefore, it is only necessary to connect the positive sampling lines of the battery cells C2, C3, etc. to the data collection unit. The short-circuit function is realized by closing switches S1~Sn-1 inside the data collection unit. Figure 3 This acquisition device supports the synchronous acquisition of the internal single-cell voltage of multiple battery modules. Figure 3 For example, when the internal cell voltage of battery module 2 needs to be measured, it is only necessary to disconnect the switch S3 between acquisition channels V3 and V4, and lead the cell negative electrode sampling line from acquisition channel V4 to the negative electrode of cell C4 in battery module 2. Figure 3 In the process, all the collected single cell voltage values are summarized by the data processing unit and data is packaged according to the battery module where the actual sampling channel is located, and the packaged data is uploaded to the host computer. During the data transmission process, the data communication method supports RS485 bus, CAN bus and industrial Ethernet; the host computer calculates the data uploaded by the data processing unit and displays all the single cell voltage values, single cell voltage extreme difference, single cell voltage extreme value and module total pressure of the battery module.
[0033] exist Figure 2 In the voltage collection device shown, the positive electrode of the first collection channel 203 corresponding to the first battery cell 201 is connected to the negative electrode of the second collection channel 208 corresponding to the second battery cell 207 in the battery module 20 through the first switch device 206 in the switch device, wherein the second battery cell 207 is adjacent to the first battery cell 201.
[0034] In the embodiment of the present application, Figure 3 In the example, C1 is used as the first cell, C2 is used as the second cell, V1 is used as the first acquisition channel, V2 is used as the second acquisition channel, and S1 is used as the first switch device. Figure 3 From the connection structure in FIG, it can be seen that C1 and C2 are cells connected in series in the battery module, and each cell corresponds to a collection channel. Specifically, Figure 3In the example, the acquisition channel corresponding to the battery cell C1 is V1, the acquisition channel corresponding to the battery cell C2 is V2, the acquisition channel corresponding to the battery cell C3 is V3, and so on. Since two adjacent battery cells (for example, C1 and C2) share a sampling line, in order to measure the voltage across C1 or C2 separately without considering other battery cells, a switch device S1 is set between V1 and V2, and the positive electrode of V1 is connected to the negative electrode of V2 through S1, so that S1 can be opened when measuring the voltage across C1, and S1 can be closed when measuring the voltage across C1 and C2.
[0035] exist Figure 2 In the voltage acquisition device shown, the negative electrode of the second battery cell 207 is connected to the positive electrode of the first acquisition channel 203 through the second sampling line 204 , and the positive electrode of the second battery cell 207 is connected to the positive electrode of the second acquisition channel 208 in the data acquisition unit 22 through the third sampling line 209 .
[0036] In the embodiment of the present application, Figure 3 C1 is used as the first battery cell, C2 is used as the second battery cell, V1 is used as the first acquisition channel, and V2 is used as the second acquisition channel. Since the first battery cell and the second battery cell are adjacent battery cells, and the positive and negative electrodes of C1 are connected to the positive and negative electrodes of V1 through the second sampling line and the first sampling line respectively, therefore, in order to simplify the wiring harness of battery cell voltage sampling, the negative electrode of C2 no longer needs to use a new sampling line to connect to the negative electrode of V2, but uses the sampling line of the positive electrode of C1, and the positive electrode of C2 uses a new sampling line (that is, the third sampling line mentioned above) to connect to the positive electrode of V2.
[0037] exist Figure 2 In the voltage acquisition device shown, the number of acquisition channels in the data acquisition unit 22 is not less than the number of cells in the battery module 20 , and the number of switch devices in the data acquisition unit 22 is less than the number of acquisition channels in the data acquisition unit 22 .
[0038] In the embodiment of the present application, the number of acquisition channels in the data acquisition unit corresponds one-to-one to the cells in the battery module, such as Figure 3 In the data acquisition unit, C1 corresponds to V1, C2 corresponds to V2, C3 corresponds to V3, and so on, and a switch device is used between adjacent acquisition channels, that is, the number of switch devices is less than the number of acquisition channels in the data acquisition unit. In addition, since the number of battery cells is determined by the battery module under test, the number of channels and the number of switch devices in the acquisition unit are fixed. For example, if the acquisition unit has 100 channels, there will be 99 switch devices, and the actual number of battery cells under test must be ≤100, and the number of battery cells in series must be within the number of acquisition channels.
[0039] exist Figure 2In the voltage collection device shown, the battery module 20 includes a first battery module 210 and a second battery module 211, the positive electrode of the tail battery cell 212 in the first battery module 210 is connected to the positive electrode of the first target collection channel 213 in the data collection unit 22, and the negative electrode of the head battery cell 214 in the second battery module 211 is connected to the negative electrode of the second target collection channel 215 in the data collection unit 22, wherein the first target collection channel is the collection channel corresponding to the tail battery cell in the first battery module, and the second target collection channel is the collection channel corresponding to the head battery cell in the second battery module.
[0040] exist Figure 2 In the voltage collection device shown, the positive electrode of the first target collection channel 213 and the negative electrode of the second target collection channel 215 are connected or disconnected through the second switch device 216 in the switch device.
[0041] In the embodiment of the present application, Figure 3 The battery module 1 in the example is used as the first battery module, the battery module 2 is used as the second battery module, the battery cell C3 is used as the tail battery cell of the battery module 1, the battery cell C4 is used as the head battery cell of the battery module 2, the acquisition channel V3 is used as the first target acquisition channel, the acquisition channel V4 is used as the second target acquisition channel, and S3 is used as the second switch device. In order to realize the synchronous or joint acquisition of the single cell voltages in multiple battery modules, it is necessary to connect the tail battery cells and the head battery cells of the two battery modules to the corresponding acquisition channels respectively. Specifically, Figure 3 In the test, the positive electrode of C3 is connected to the positive electrode of V3, the negative electrode of C4 is connected to the negative electrode of V4, and the positive electrode of V3 is connected or disconnected with the negative electrode of V4 through S3. Therefore, when battery module 1 and battery module 2 are two independent DUTs, when measuring the internal single cell voltages of battery module 1 and battery module 2 separately, S3 can be disconnected, and S1, S2, S4, and S5 can be closed at the same time. At this time, battery module 1 and battery module 2 are completely independent.
[0042] exist Figure 2 In the voltage collection device shown, the battery module is composed of multiple cells connected in series. Figure 3 When the battery module 1 is used, the battery module 1 is composed of battery cells C1 to C3 connected in series.
[0043] pass Figure 2 The voltage acquisition device shown is compared with Figure 1 The voltage acquisition device in the data acquisition unit not only simplifies the wiring harness for cell voltage sampling, but also has a built-in switch device in the data acquisition unit, eliminating the need to manually make short-circuit wires, reducing the possibility of virtual connection of the sampling line caused by human factors. Figure 2The voltage collection device in the system has a high degree of customization. Different switch devices can be closed according to different needs to realize voltage collection of different battery cells or battery modules. In addition, Figure 2 The voltage collection device can realize the simultaneous collection of cell voltages for multiple modules with different numbers of strings, which is more efficient.
[0044] Figure 4 is a structural diagram of a voltage acquisition system according to an embodiment of the present application, such as Figure 4 As shown, the voltage acquisition system 400 includes: a voltage acquisition device 42, a data processing unit 44 and a host computer 46, wherein the voltage acquisition device is Figure 2 The voltage acquisition device comprises a battery module and a data acquisition unit, wherein the battery module is composed of a plurality of cells connected in series, the negative electrode of the first cell in the battery module is connected to the negative electrode of the first acquisition channel in the data acquisition unit through a first sampling line, and the positive electrode of the first cell is connected to the positive electrode of the first acquisition channel through a second sampling line, wherein other cells in the battery module except the first cell share a common sampling line with adjacent cells and are connected to the acquisition channel in the data acquisition unit, the cells in the battery module are connected in the same connection order, and the positive electrode of the last cell in the battery module is connected to the positive electrode of the target acquisition channel in the data acquisition unit through a target sampling line; each acquisition channel in the data acquisition unit is connected through a switch device; a data processing unit is connected to the data acquisition unit, wherein the data processing unit is used to receive and summarize the voltage data of the cells collected by the data acquisition unit; and a host computer is connected to the data processing unit, wherein the host computer is used to receive the voltage data processed by the data processing unit and display the processing result of the voltage data.
[0045] exist Figure 4 In the voltage collection device in the voltage collection system shown, the positive electrode of the first collection channel corresponding to the first battery cell is connected to the negative electrode of the second collection channel corresponding to the second battery cell in the battery module through the first switch device in the switch device, wherein the second battery cell is adjacent to the first battery cell.
[0046] exist Figure 4 In the voltage acquisition device in the voltage acquisition system shown, the negative electrode of the second battery cell is connected to the positive electrode of the first acquisition channel through the second sampling line, and the positive electrode of the second battery cell is connected to the positive electrode of the second acquisition channel in the data acquisition unit through the third sampling line.
[0047] exist Figure 4 In the voltage acquisition device in the voltage acquisition system shown, the number of acquisition channels in the data acquisition unit is not less than the number of battery cells in the battery module, and the number of switch devices in the data acquisition unit is less than the number of acquisition channels in the data acquisition unit.
[0048] exist Figure 4 In the voltage acquisition device in the voltage acquisition system shown, the battery module includes a first battery module and a second battery module, the positive electrode of the tail battery cell in the first battery module is connected to the positive electrode of the first target acquisition channel in the data acquisition unit, and the negative electrode of the head battery cell in the second battery module is connected to the negative electrode of the second target acquisition channel in the data acquisition unit.
[0049] exist Figure 4 In the voltage acquisition device in the voltage acquisition system shown, the positive electrode of the first target acquisition channel and the negative electrode of the second target acquisition channel are connected or disconnected through the second switch device in the switch device.
[0050] exist Figure 4 In the voltage acquisition system shown, the data processing unit communicates with the host computer via a target bus or industrial Ethernet, wherein the target bus includes at least one of the following: an RS485 bus and a CAN bus.
[0051] It should be noted that Figure 4 The voltage acquisition system shown in the figure includes a voltage acquisition device and Figure 2 The connection structure and operation principle of the voltage acquisition device in the Figure 2 The relevant explanations about the voltage acquisition device in the Figure 4 The voltage acquisition device in the voltage acquisition system shown is not described in detail here.
[0052] Figure 4 The voltage acquisition system shown has the following advantages when collecting voltages of battery cells in a battery module: 1) The wiring harness for sampling battery cell voltage is simplified; 2) A switching device is built into the data acquisition unit, eliminating the need to manually make short-circuit wires, thereby reducing virtual connections of sampling lines caused by human factors; 3) The degree of customization is high, which is more in line with the needs of single-cell voltage acquisition; 4) Multiple modules with different numbers of strings can be used to collect battery cell voltages at the same time, which is more efficient and flexible to combine.
[0053] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.
[0054] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0055] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0056] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0057] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0058] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.
[0059] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A voltage collection device, characterized in that: include: Battery module, data acquisition unit, including: The negative electrode of the first battery cell in the battery module is connected to the negative electrode of the first acquisition channel in the data acquisition unit through the first sampling line, and the positive electrode of the first battery cell is connected to the positive electrode of the first acquisition channel through the second sampling line, wherein the battery cells other than the first battery cell in the battery module and the adjacent battery cells share a sampling line to be connected to the acquisition channel in the data acquisition unit, the battery cells in the battery module are connected in the same connection order, and the positive electrode of the last battery cell in the battery module is connected to the positive electrode of the target acquisition channel in the data acquisition unit through the target sampling line; Each acquisition channel in the data acquisition unit is connected via a switch device.
2. The voltage acquisition device according to claim 1, characterized in that: The positive electrode of the first collection channel corresponding to the first battery cell is connected to the negative electrode of the second collection channel corresponding to the second battery cell in the battery module through the first switch device in the switch device, wherein the second battery cell is adjacent to the first battery cell.
3. The voltage acquisition device according to claim 2, characterized in that: The negative electrode of the second battery cell is connected to the positive electrode of the first acquisition channel through the second sampling line, and the positive electrode of the second battery cell is connected to the positive electrode of the second acquisition channel in the data acquisition unit through the third sampling line.
4. The voltage acquisition device according to claim 1, characterized in that: The number of acquisition channels in the data acquisition unit is not less than the number of battery cells in the battery module.
5. The voltage acquisition device according to claim 1, characterized in that: The number of switch devices in the data acquisition unit is less than the number of acquisition channels in the data acquisition unit.
6. The voltage acquisition device according to claim 1, characterized in that: The battery module includes a first battery module and a second battery module. The positive electrode of the tail battery cell in the first battery module is connected to the positive electrode of the first target acquisition channel in the data acquisition unit, and the negative electrode of the head battery cell in the second battery module is connected to the negative electrode of the second target acquisition channel in the data acquisition unit.
7. The voltage acquisition device according to claim 6, characterized in that: The positive electrode of the first target collection channel and the negative electrode of the second target collection channel are connected or disconnected by a second switch device in the switch devices.
8. The voltage acquisition device according to claim 1, characterized in that: The battery module is composed of a plurality of battery cells connected in series.
9. A voltage acquisition system, characterized in that: include: Voltage acquisition device, data processing unit and host computer, among which, The voltage acquisition device comprises a battery module and a data acquisition unit, wherein the negative electrode of the first battery cell in the battery module is connected to the negative electrode of the first acquisition channel in the data acquisition unit through a first sampling line, and the positive electrode of the first battery cell is connected to the positive electrode of the first acquisition channel through a second sampling line, wherein other battery cells in the battery module except the first battery cell and adjacent battery cells share a sampling line connected to the acquisition channel in the data acquisition unit, the battery cells in the battery module are connected in the same connection order, and the positive electrode of the last battery cell in the battery module is connected to the positive electrode of the target acquisition channel in the data acquisition unit through a target sampling line; each acquisition channel in the data acquisition unit is connected through a switch device; The data processing unit is connected to the data acquisition unit, wherein the data processing unit is used to receive and summarize the voltage data of the battery cells collected by the data acquisition unit; The host computer is connected to the data processing unit, wherein the host computer is used to receive the voltage data processed by the data processing unit and display the processing result of the voltage data.
10. The system according to claim 9, characterized in that The data processing unit communicates with the host computer via a target bus or industrial Ethernet, wherein the target bus includes at least one of the following: an RS485 bus and a CAN bus.