Data acquisition assembly for battery cell and battery pack

Abstract

The utility model provides a data acquisition assembly for a battery cell and a battery pack. The data acquisition assembly for the battery cell comprises a first printed circuit board which comprises a first circuit board, a first negative electrode connecting terminal and a first positive electrode connecting terminal, and the first negative electrode connecting terminal and the first positive electrode connecting terminal are arranged at the two opposite ends of the first circuit board in the first direction so as to be capable of acquiring voltage information of the battery cell; the second printed circuit board comprises a second circuit board as well as a second cathode connecting terminal and a second anode connecting terminal which are respectively arranged on the second circuit board, the first cathode connecting terminal and the second anode connecting terminal are sequentially arranged along a second direction, and an included angle is formed between the second direction and the first direction; collection lines are arranged in the first circuit board and the second circuit board; and the antenna bus is arranged along the second direction and corresponds to the acquisition line in the vertical direction, and the antenna bus is in communication connection with the acquisition line. According to the technical scheme, the length of the antenna bus is short, and the production cost is low.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a data acquisition component for battery cells and a battery pack. Background Technology

[0002] With the continuous development of new energy technologies, power battery technology has been widely applied in various fields of life and production. As one of the basic units of power batteries, the battery pack is composed of multiple cells or battery modules. Each cell or module is connected in series or parallel to form a battery pack.

[0003] In the application process, in order to clearly understand the actual usage status of each cell or battery module, so as to accurately control it, improve its service life and safety, it is often necessary to configure corresponding data acquisition cables and communication cables for each cell or battery module to collect battery information of each cell or module in real time.

[0004] However, in practical applications, the above configuration requires a large number of cables to be laid in the battery pack, which takes up extra space and is costly due to the excessive length of the cables. Utility Model Content

[0005] The main purpose of this utility model is to provide a data acquisition component and battery pack for battery cells, so as to solve the problem of excessively long antenna bus layout and high production cost in the prior art.

[0006] To achieve the above objectives, according to one aspect of this utility model, a data acquisition component for battery cells is provided, comprising: a first printed circuit board, including a first circuit board, a first negative connection terminal, and a first positive connection terminal, wherein the first negative connection terminal and the first positive connection terminal are arranged at opposite ends in a first direction of the first circuit board to acquire voltage information of the battery cells; a second printed circuit board, including a second circuit board and a second negative connection terminal and a second positive connection terminal respectively disposed on the second circuit board, wherein the first negative connection terminal and the second positive connection terminal are arranged sequentially along a second direction to acquire voltage information of another battery cell, wherein there is an angle between the second direction and the first direction; acquisition lines are provided in both the first circuit board and the second circuit board; and an antenna bus is arranged along the second direction and vertically corresponding to the acquisition lines, and the antenna bus is communicatively connected to the acquisition lines. Through the specific layout of the two printed circuit boards and the corresponding antenna bus, efficient data acquisition and communication for a single row of battery cells can be achieved, further reducing the use of cables, lowering costs, and improving the stability and efficiency of signal transmission.

[0007] Furthermore, the first printed circuit board also includes a first electronic component electrically connected to the first circuit board, the first electronic component being disposed at the positive terminal of the first circuit board; the second printed circuit board also includes a second electronic component electrically connected to the second circuit board, the second electronic component being disposed at the negative terminal of the second circuit board. This configuration allows for the acquisition of information such as the voltage and temperature of the battery cell, while reducing the use of external connectors and simplifying the battery pack structure.

[0008] Furthermore, a first acquisition line is provided within the first circuit board, and a second acquisition line is provided within the second circuit board. The first acquisition line is located at the positive terminal of the first circuit board, and the second acquisition line is located at the negative terminal of the second circuit board. The antenna bus is wirelessly connected to both the first and second acquisition lines. In this configuration, by setting acquisition lines inside the PCB and enabling wireless communication with the antenna bus, non-contact acquisition of battery cell information is achieved, ensuring the stability and accuracy of data transmission.

[0009] Furthermore, the data acquisition component for the battery cell also includes a limiting structure located on the antenna bus's layout path to ensure that the antenna bus is parallel to the acquisition line. This limiting structure ensures parallelism and stability between the antenna bus and the acquisition line, thereby optimizing the signal transmission path and improving signal transmission stability and efficiency.

[0010] Furthermore, the limiting structure includes: a first limiting member disposed on the first circuit board, with at least one side of the first acquisition line within the first circuit board having the first limiting member; and a second limiting member disposed on the second circuit board, with at least one side of the second acquisition line within the second circuit board having the second limiting member. This configuration better supports and limits the antenna bus, ensuring the parallelism and stability of the antenna bus and the acquisition line, and achieving efficient data transmission.

[0011] Furthermore, at least one of the first and second limiting components includes a flexible mounting component with a limiting groove, in which the antenna bus is secured. When arranging the antenna bus, securing it into the limiting groove of the flexible mounting component ensures the parallelism and stability of the antenna bus and the acquisition line, enabling efficient data transmission.

[0012] Furthermore, the elastic mounting component has protrusions, and at least one of the first and second printed circuit boards has mounting holes. The elastic mounting component engages with the mounting holes via the protrusions; alternatively, a stop is provided at the opening of the limiting groove to prevent the antenna bus from dislodging from the limiting groove. The engagement of the protrusions with the mounting holes, and the stop at the opening of the limiting groove, ensure stable fixation of the elastic mounting component and reliable positioning of the antenna bus.

[0013] Furthermore, there are two first limiting members, with the first acquisition line and the first electronic component located between the two first limiting members along the second direction; and / or, there are two second limiting members, with the second acquisition line and the second electronic component located between the two second limiting members along the second direction. By setting multiple limiting members, the parallelism and stability between the antenna bus and the acquisition line can be ensured.

[0014] Furthermore, the first limiting member and the first acquisition line are both located at the positive end of the first circuit board, while the second limiting member and the second acquisition line are both located at the negative end of the second circuit board. By setting the limiting member and acquisition line at the positive and negative ends of the printed circuit board, the signal transmission path is optimized, while ensuring the accurate position and stable fixation of the antenna bus.

[0015] Furthermore, the first circuit board and / or the second circuit board are provided with through holes for explosion-proof valves to avoid the battery cells.

[0016] Furthermore, the first negative terminal and the first positive terminal are Z-shaped nickel strips; or, the second negative terminal and the second positive terminal are Z-shaped nickel strips. When assembling the data acquisition component into the battery cell assembly, ensuring close contact between the Z-shaped nickel strip terminals and the positive and negative terminals of the battery cell ensures the stability and accuracy of signal transmission.

[0017] Furthermore, both the first and second negative connection terminals are provided with mounting notches; the data acquisition assembly for the battery cell also includes a first temperature sensor mounted on the first circuit board and a second temperature sensor mounted on the second circuit board. Vertically, the first and second temperature sensors are respectively positioned at their corresponding mounting notches. In this design, by providing mounting notches on the connection terminals, mounting positions for the temperature sensors are provided, while ensuring close contact between the temperature sensors and the battery cell, thus improving the accuracy of temperature monitoring.

[0018] According to another aspect of this utility model, a battery pack is provided, including a cell assembly and the aforementioned cell data acquisition component. The cell assembly includes multiple cells arranged sequentially and connected in series along a second direction. In any two adjacent cells, one cell is electrically connected to a first printed circuit board, and the other cell is electrically connected to a second printed circuit board. By combining the data acquisition component with the cell assembly, independent monitoring and management of each cell in the battery pack is achieved, improving the overall performance and safety of the battery pack.

[0019] Furthermore, there are multiple first and second printed circuit boards, arranged alternately. In two adjacent cells, the positive terminal of the first cell is connected to the negative terminal of the second cell via a first connecting electrode, the negative terminal of the first cell is connected to a second connecting electrode, the second positive terminal is connected to the first connecting electrode, the first circuit board is connected to the corresponding second cell, and the second negative terminal is connected to the second connecting electrode. By alternately arranging the first and second printed circuit boards, and the corresponding first and second connecting electrodes, efficient series connection and data acquisition of the cells in the battery pack are achieved.

[0020] By applying the technical solution of this utility model, for two battery cells connected in series, the first negative terminal on the first printed circuit board is connected to the negative terminal of one battery cell, and the first positive terminal is connected to the positive terminal of the same battery cell, thereby enabling the acquisition of voltage information across the two ends of the battery cell. Similarly, the second negative terminal on the second printed circuit board is connected to the negative terminal of the other battery cell, and the second positive terminal is connected to the positive terminal of the same battery cell, thereby enabling the acquisition of voltage information across the two ends of the battery cell. Furthermore, the antenna bus extends along a second direction and is arranged at the same end of the first and second printed circuit boards. This way, the antenna bus only needs to extend along the second direction without bending, resulting in a shorter antenna bus length (e.g., it can be shortened by half), reducing production costs. Furthermore, the antenna bus is vertically connected to the first acquisition line of the first circuit board and the second acquisition line of the second circuit board for short-range communication, simplifying the signal transmission path, improving signal transmission efficiency, and ensuring the accuracy of data acquisition. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 A top view of the data acquisition component for battery cells of this invention is shown;

[0023] Figure 2 It shows Figure 1 A partially exploded view of the first printed circuit board and antenna bus of the data acquisition component for the battery cell.

[0024] Figure 3 A three-dimensional structural schematic diagram of the battery pack of this utility model from one direction is shown;

[0025] Figure 4 It shows Figure 1A schematic diagram of the structure of the elastic mounting component for the data acquisition assembly of the battery cell;

[0026] Figure 5 It shows Figure 3 A three-dimensional structural diagram of the battery pack from another direction; and

[0027] Figure 6 A top view of the assembly structure of the battery pack of this utility model is shown.

[0028] The above figures include the following reference numerals:

[0029] 1. First printed circuit board; 2. Second printed circuit board; 10. First circuit board; 101. First mounting hole; 11. First negative terminal; 111. First mounting notch; 12. First positive terminal; 13. First electronic component; 14. First through hole; 20. Second circuit board; 21. Second negative terminal; 22. Second positive terminal; 23. Second electronic component; 24. Second through hole; 4. Antenna bus; 30. Elastic mounting component; 31. Limiting groove; 32. Protrusion; 33. Stop; 5. Battery cell. Detailed Implementation

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] In this utility model and its embodiments, the positive terminal refers to the end of the first circuit board 10 or the second circuit board 20 where a positive connection terminal is provided, and the negative terminal refers to the end of the first circuit board 10 or the second circuit board 20 where a negative connection terminal is provided. The English name for a printed circuit board is Printed Circuit Board (PCB).

[0032] Additionally, the first direction refers to the length direction of the battery pack or cell assembly, i.e. Figure 1 The first direction refers to the X-axis direction; the second direction refers to the width direction of the battery pack or cell assembly, i.e. Figure 1 The Y-axis direction. The vertical direction is the height direction of the battery pack or cell assembly, i.e. Figure 1 The Z-axis direction.

[0033] In this utility model and its embodiments, both the first printed circuit board 1 and the second printed circuit board 2 are capable of collecting information such as voltage, current, and temperature of the corresponding battery cell 5. Both the first electronic component 13 and the second electronic component 23 include resistors and capacitors; this is intended to prevent short circuits in the battery cell. Alternatively, they can be configured to detect temperature.

[0034] like Figures 1 to 6 As shown, an embodiment of this utility model provides a battery pack. The battery pack includes a cell group and a data acquisition component for the cells. The cell group includes a plurality of cells 5 arranged sequentially and connected in series along a second direction. In any two adjacent cells 5, one cell 5 is electrically connected to a first printed circuit board 1, and the other cell 5 is electrically connected to a second printed circuit board 2.

[0035] In the above configuration, each battery cell 5 has a corresponding printed circuit board on its top. Specifically, the first positive terminal 12 of the first printed circuit board 1 is electrically connected to the positive terminal of the corresponding battery cell 5, and the first negative terminal 11 is connected to the negative terminal of the corresponding battery cell 5, thereby enabling the collection of voltage information of the battery cell 5. Similarly, the second printed circuit board 2 can collect voltage information of the corresponding battery cell 5. In this way, through the integrated design of the battery cell group and the data acquisition component, independent and real-time voltage monitoring of multiple battery cells 5 connected in series in the battery pack is realized, thereby improving the overall performance and safety of the battery pack.

[0036] The specific structure of the data acquisition component for battery cells is described below:

[0037] like Figure 1 As shown, the data acquisition component for the battery cell includes a first printed circuit board 1 and a second printed circuit board 2 arranged sequentially. The first printed circuit board 1 includes a first circuit board 10, a first negative terminal 11, and a first positive terminal 12. The first negative terminal 11 and the first positive terminal 12 are arranged at opposite ends in a first direction of the first circuit board 10 to acquire voltage information of the battery cell 5. The second printed circuit board 2 includes a second circuit board 20 and a second negative terminal 21 and a second positive terminal 22 respectively disposed on the second circuit board 20. The first negative terminal 11 and the second positive terminal 22 are arranged sequentially along a second direction to acquire voltage information of another battery cell 5. There is an angle between the second direction and the first direction. Acquisition lines are provided in both the first circuit board 10 and the second circuit board 20. The antenna bus 4 is arranged along the second direction and is vertically aligned with the acquisition lines. The antenna bus 4 is communicatively connected to the acquisition lines.

[0038] Using this structure, for two battery cells 5 connected in series, the first negative terminal 11 on the first printed circuit board 1 is connected to the negative terminal of one battery cell 5, and the first positive terminal is connected to the positive terminal of the same battery cell 5, thereby enabling the acquisition of voltage information across the two ends of the battery cell 5. Similarly, the second negative terminal 21 on the second printed circuit board 2 is connected to the negative terminal of the other battery cell 5, and the second positive terminal 22 is connected to the positive terminal of the same battery cell 5, thereby enabling the acquisition of voltage information across the two ends of the battery cell 5. Furthermore, the antenna bus 4 extends along the second direction and is arranged at the same end of the first printed circuit board 1 and the second printed circuit board 2. In this way, the antenna bus 4 only needs to be routed once along the second direction without bending. The length of the antenna bus 4 in this application is relatively short (for example, it can be shortened by half), reducing production costs. Furthermore, the antenna bus 4 is vertically connected to the first acquisition line of the first circuit board 10 and the second acquisition line of the second circuit board 20, simplifying the signal transmission path, improving signal transmission efficiency, and ensuring the accuracy of data acquisition. The first and second PCBs are respectively equipped with positive and negative terminals, allowing for the acquisition of the voltage of their respective connected cells 5, thus improving the accuracy and real-time performance of the monitoring data. Additionally, the antenna bus 4 can also wirelessly transmit data with external detection equipment.

[0039] Specifically, in the embodiments of this utility model, near-field wireless communication technology is used to realize the wireless connection between the antenna bus 4 and the acquisition lines in the first printed circuit board 1 and the second printed circuit board 2, thereby improving the data acquisition and communication control method in the battery pack, so as to improve the stability of signal transmission, reduce manufacturing costs, and simplify the structure of the battery pack.

[0040] It should be noted that this cell data acquisition component is mainly used in battery packs that require high-density cell arrangement, such as in new energy vehicles and energy storage systems. This component can monitor the status of each cell in real time, ensuring the safe operation of the battery system.

[0041] like Figure 1 As shown, in an embodiment of the present invention, the first printed circuit board 1 further includes a first electronic component 13 electrically connected to the first circuit board 10, the first electronic component 13 being arranged at the positive terminal of the first circuit board 10; the second printed circuit board 2 further includes a second electronic component 23 electrically connected to the second circuit board, the second electronic component 23 being arranged at the negative terminal of the second circuit board 20.

[0042] Specifically, the first electronic component 13 is located at the positive terminal of the first circuit board 10, and the second electronic component 23 is located at the negative terminal of the second circuit board 20. The positive and negative leads of the conductive circuits in the two circuit boards are brought out at opposite positions. This ensures that the voltage information of each cell 5 is collected through the shortest path of the circuit board, thereby optimizing the signal transmission path and spatial layout. Moreover, this arrangement ensures that the antenna bus 4 extends along the same end of multiple circuit boards without bending into a U-shape, etc. That is, for a single row of cells, the antenna bus 4 only needs to be run once. Therefore, the antenna bus 4 used is shorter in length.

[0043] In this utility model and its embodiments, the first printed circuit board 1 further includes a first conductive circuit integrated within the first circuit board 10, wherein the positive lead of the first conductive circuit is electrically connected to the first positive terminal 12, and the negative lead of the first conductive circuit is electrically connected to the first negative terminal 11; similarly, the second printed circuit board 2 further includes a second conductive circuit integrated within the second circuit board 20, wherein the positive lead of the second conductive circuit is electrically connected to the second positive terminal 22, and the negative lead of the second conductive circuit is electrically connected to the second negative terminal.

[0044] In the actual production process, such as Figure 1 As shown, the positive lead of the first conductive circuit of the first printed circuit board 1 is located at the right end of the first circuit board 10, and the negative lead of the first conductive circuit is located at the left end. Based on this, the positive lead of the first conductive circuit can be arranged to the left end of the circuit board and the negative lead of the first conductive circuit can be arranged to the right end of the circuit board by adjusting the position of the lead or adding metal connectors, thereby obtaining the structure of the second circuit board 20 of this application.

[0045] It should be noted that the positive and negative leads of the first conductive circuit in the first circuit board 10 are led out at positions opposite to those of the positive and negative leads of the second conductive circuit in the second circuit board 20. When the two printed circuit boards are used in series-connected cells, the wiring method of the antenna bus 4 can be optimized to ensure that the antenna bus 4 is arranged on the same side of multiple circuit boards, thereby reducing the length of the antenna bus 4.

[0046] like Figure 1 As shown, in one embodiment of the present invention, a first acquisition line is provided in the first circuit board 10, and a second acquisition line is provided in the second circuit board 20. The first acquisition line is located at the positive end of the first circuit board 10, and the second acquisition line is located at the negative end of the second circuit board 20. The antenna bus 4 is wirelessly connected to the first acquisition line and the second acquisition line respectively.

[0047] In the above setup, the first acquisition line is located at the positive terminal of the circuit board, and the second acquisition line is located at the negative terminal. Both the first and second acquisition lines are wirelessly connected to antenna bus 4, avoiding the limitations of wired connections and improving communication flexibility and system integration. Furthermore, the introduction of wireless communication reduces the use of physical cables, lowers interference and attenuation during signal transmission, and ensures the stability and accuracy of data acquisition such as voltage information.

[0048] It should be noted that both the first and second acquisition lines are used to acquire the voltage of the corresponding battery cells. The first acquisition line is electrically connected to the negative terminal of the battery cell through the first negative terminal 11, and the first acquisition line is electrically connected to the positive terminal of the same battery cell through the first positive terminal 12.

[0049] like Figures 1 to 4 As shown in one embodiment of this utility model, the data acquisition component for the battery cell further includes a limiting structure disposed on the arrangement path of the antenna bus 4, so that the antenna bus 4 is arranged parallel to the acquisition line. The antenna bus is BusAntenna, which is made of a relatively soft material. The setting of the limiting structure ensures that the antenna bus 4 is arranged as parallel as possible to the acquisition line, thereby improving the stability of signal transmission.

[0050] like Figure 1 As shown, in one embodiment of the present invention, the limiting structure includes: a first limiting member disposed on a first circuit board 10, wherein at least one side of the first acquisition line within the first circuit board 10 is provided with the first limiting member; and a second limiting member disposed on a second circuit board 20, wherein at least one side of the second acquisition line within the second circuit board 20 is provided with the second limiting member.

[0051] The first and second limiting members not only protect the antenna bus 4, but also optimize the wireless signal transmission path and reduce signal interference through precise correspondence with the acquisition line. Specifically, the first and second limiting members are respectively set on at least one side of the acquisition line on the circuit board, forming a constraint on the antenna bus 4, ensuring the stability of the antenna bus 4 on the predetermined path, and reducing the randomness of signal transmission.

[0052] In an optional embodiment, such as Figure 1 As shown, there are two first limiting members and two second limiting members. Along the second direction, the first acquisition line and the first electronic component are located between the two first limiting members; along the second direction, the second acquisition line and the second electronic component are located between the two second limiting members.

[0053] Through the above-described configuration, the first limiting member can effectively support a portion of the antenna bus line located above the first circuit board, ensuring that the antenna bus 4 and the corresponding first acquisition line maintain a preset distance for effective signal transmission and thus guaranteeing signal transmission stability. Similarly, second limiting members are provided at both ends of the second acquisition line to ensure stable signal transmission between the second acquisition line and the antenna bus 4.

[0054] like Figure 1 As shown, in one embodiment of this utility model, the first limiting member and the first acquisition line are both located at the positive end of the first circuit board 10, and the second limiting member and the second acquisition line are both located at the negative end of the second circuit board 20. This allows the limiting member, acquisition member, and electronic components to be located at the same end of the circuit board (e.g., at either the positive or negative end), resulting in a compact layout. Of course, in alternative embodiments not shown in the accompanying drawings, the limiting member and acquisition member can be located at one end of the circuit board, while the electronic components can be located at the other end, depending on actual needs.

[0055] like Figure 1 and Figure 3 As shown, in one embodiment, the first limiting member and the second limiting member have the same structure, both including an elastic mounting member 30, and the elastic mounting member 30 is provided with a limiting groove 31, and the antenna bus 4 is locked in the limiting groove 31.

[0056] This setting allows for limiting the X-axis direction of antenna bus 4.

[0057] like Figure 4 As shown, in one embodiment, the elastic mounting member 30 has a protrusion 32, and at least one of the first printed circuit board 1 and the second printed circuit board 2 has a mounting hole. The elastic mounting member 30 is engaged with the mounting hole via the protrusion 32. Specifically, as shown... Figure 2 As shown, the first printed circuit board 1 has four first mounting holes 101, and each elastic mounting member 30 is respectively engaged in two first mounting holes 101 by two protrusions 32. Along the Y-axis direction, two elastic mounting members 30 are respectively set at both ends of the first acquisition line to support and limit the antenna bus 4.

[0058] In the above technical solution, by setting an additional flexible mounting component 30, the purpose of fixing the antenna bus 4 is achieved without changing the battery pack structure or adding a cover or bracket. In this way, the signal transmission requirements of close-range and parallel installation of the antenna bus 4 and the acquisition lines (i.e. short antennas) on each PCB board can be met with minimal structural changes.

[0059] like Figure 4 As shown, in one embodiment, a stop 33 is provided at the opening of the limiting groove 31 to prevent the antenna bus 4 from coming out of the limiting groove 31.

[0060] In this way, the antenna bus 4 can be limited in the Z-axis direction (i.e., the height direction of the battery pack) by using the stop 33 and the bottom wall of the limiting groove 31, preventing it from moving in the height direction, thereby ensuring that the antenna bus 4 maintains a fixed distance from the corresponding acquisition line and ensuring the stability of short-range communication. In a specific embodiment, the stop 33 is a stop block extending into the groove along the side wall of the limiting groove 31, and the stop block has a stop surface opposite to the bottom wall. Preferably, stop blocks are provided on both opposite side walls of the limiting groove 31. To facilitate the insertion of the antenna bus 4 into the limiting groove 31, the outer surfaces of the two stop blocks have arc-shaped surfaces, forming a flared shape that is larger at the top and smaller at the bottom from top to bottom.

[0061] In one embodiment, the resilient mounting member 30 and the stop member 33 are integrally molded, which facilitates processing. Optionally, the resilient mounting member 30 is made of plastic.

[0062] like Figure 1 As shown, the first circuit board 10 and / or the second circuit board 20 are provided with through holes for avoiding the explosion-proof valve of the battery cell 5. In one embodiment, the through hole on the first circuit board 10 is a first through hole 14, and the through hole on the second circuit board 20 is a second through hole 24. Through the above arrangement, not only can weight reduction be achieved, but it can also cooperate with the explosion-proof valve on the battery cell 5 to realize the pre-positioning function of each circuit board and the battery cell 5; furthermore, it avoids any structure on the circuit board from obstructing the explosion-proof valve of the battery cell 5, ensuring battery safety and effective installation of the circuit board.

[0063] like Figure 1 , Figure 2 and Figure 5 As shown, in one embodiment of the present invention, the first negative terminal 11 and the first positive terminal 12 are Z-shaped nickel sheets; or, the second negative terminal 21 and the second positive terminal 22 are Z-shaped nickel sheets.

[0064] Z-shaped nickel strips, used as connecting terminals, provide a robust electrical connection. At the same time, the Z-shaped design effectively reduces the space occupied by the connecting terminals, improving the overall integration and connection efficiency of the components.

[0065] Of course, in alternative embodiments not shown in the accompanying drawings, the connection terminals may be L-shaped or other shapes depending on the actual situation.

[0066] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, both the first negative terminal 11 and the second negative terminal 21 are provided with mounting notches; the data acquisition component for the battery cell also includes a first temperature sensor integrated on the first circuit board 10 and a second temperature sensor integrated on the second circuit board 20. In the vertical direction, the first temperature sensor and the second temperature sensor are respectively set at the corresponding mounting notches.

[0067] In the above configuration, the surface temperature of the corresponding battery cell 5 can be directly monitored using a temperature sensor integrated on the circuit board, improving the accuracy and real-time performance of temperature monitoring. This allows for the timely detection and replacement of battery cells 5 with abnormal temperatures. Specifically, the mounting notch on the first circuit board 10 is a first mounting notch 111. This design ensures that the first temperature sensor is in close contact with the surface of the battery cell 5, reducing the thermal resistance between the first temperature sensor and the battery cell 5 and ensuring accurate temperature data acquisition. It should be noted that the sensor can be integrated into the corresponding circuit board or placed on the surface of the circuit board.

[0068] like Figure 2 As shown, along the direction near the first positive terminal, the first mounting notch 111 includes a first segment, a second segment, and a third segment connected in sequence. The inner diameters of the first and third segments are larger than the inner diameter of the second segment. All three segments penetrate the first negative terminal 11 along the Z-axis. The third segment has an opening facing the first positive terminal. This configuration allows for better matching of the first temperature sensor mounted on the first circuit board 10, resulting in a more compact structure for the entire battery cell's data acquisition assembly.

[0069] As can be seen from the above analysis, in the embodiments of this utility model, by optimizing the wiring position of the antenna bus 4 and optimizing the design of the connection terminals, the cable length and component weight are reduced, the production cost of the battery pack is reduced, and the weight of the battery pack is also reduced, thus improving the portability of the battery pack.

[0070] In one embodiment of this utility model, such as Figure 5 and Figure 6 As shown, the battery pack includes multiple rows of cell groups, each row comprising multiple cells connected in series. Multiple first printed circuit boards 1 and second printed circuit boards 2 are present, arranged alternately. In adjacent cells, the positive terminal of the first cell is connected to the negative terminal of the second cell via a first connecting electrode 6, the negative terminal of the first cell is connected to a second connecting electrode 7, the second positive terminal is connected to the first connecting electrode 6, the first circuit board is connected to the corresponding second cell, and the second negative terminal is connected to the second connecting electrode 7. Specifically, as shown... Figure 5 and Figure 6As shown, the cell 5 on the right (i.e., the second cell in front) can be connected in series with another cell 5 through another second connecting electrode 7. The cell 5 on the left (i.e., the first cell in front) can also be connected in series with another cell 5 through the second connecting electrode 7. In this way, a first printed circuit board is set above the cell to the left of the first cell 5, a second printed circuit board is set above the cell to the right of the second cell 5, and so on, so that data acquisition of a single cell can be realized.

[0071] By alternately arranging the first printed circuit board 1 and the second printed circuit board 2, along with the first connecting electrode and the second connecting electrode that cooperate with them, efficient series connection and data acquisition of the cells in the battery pack are achieved.

[0072] As can be seen from the foregoing description, the embodiments of this application achieve the following technical effects:

[0073] 1. The stability of signal transmission is significantly improved because the bus antenna (e.g., Bus Antenna) is mounted in close parallel proximity to the acquisition lines in the first printed circuit board 1 or the second printed circuit board 2, especially for signal transmission on a single row of cells.

[0074] 2. The manufacturing cost of the battery pack has been reduced, mainly by reducing the length of the bus antenna.

[0075] 3. The battery pack structure design has been simplified, saving space for the monitoring module and wiring harness, making the battery pack more compact overall.

[0076] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: For two battery cells 5 connected in series, the first negative terminal 11 on the first printed circuit board 1 is connected to the negative terminal of one battery cell 5, and the first positive terminal is connected to the positive terminal of the same battery cell 5, so that the voltage information at both ends of the battery cell 5 can be collected; similarly, the second negative terminal 21 on the second printed circuit board 2 is connected to the negative terminal of the other battery cell 5, and the second positive terminal 22 is connected to the positive terminal of the same battery cell 5, so that the voltage information at both ends of the battery cell 5 can be collected; furthermore, the antenna bus 4 extends along the second direction and is arranged at the same end of the first printed circuit board 1 and the second printed circuit board 2. In this way, the antenna bus 4 only needs to extend along the second direction without bending. The length of the antenna bus 4 in this application is relatively short (for example, it can be shortened by half), which reduces the production cost. Furthermore, the antenna bus 4 is vertically connected to the first acquisition line of the first circuit board 10 and the second acquisition line of the second circuit board 20, simplifying the signal transmission path, improving signal transmission efficiency, and ensuring the accuracy of data acquisition. The first and second PCBs are respectively equipped with positive and negative terminals, allowing for the separate acquisition of the voltage of each connected cell 5, thus improving the accuracy and real-time performance of the monitoring data. Furthermore, through the integrated design of the cell group and the data acquisition component, independent and real-time voltage monitoring of multiple cells 5 connected in series within the battery pack is achieved, thereby improving the overall performance and safety of the battery pack.

[0077] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0078] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A data acquisition component for battery cells, characterized in that, include: The first printed circuit board (1) includes a first circuit board (10), a first negative terminal (11) and a first positive terminal (12). The first negative terminal (11) and the first positive terminal (12) are arranged at opposite ends of the first circuit board (10) in a first direction. The first printed circuit board (1) can collect the voltage information of the battery cell. The second printed circuit board (2) includes a second circuit board (20) and a second negative terminal (21) and a second positive terminal (22) respectively disposed on the second circuit board (20). The first negative terminal (11) and the second positive terminal (22) are arranged sequentially along a second direction to be able to collect voltage information of another cell. There is an angle between the second direction and the first direction. Both the first circuit board (10) and the second circuit board (20) are provided with acquisition lines. Antenna bus (4) is arranged along the second direction and is set in the vertical direction corresponding to the acquisition line. Antenna bus (4) is communicatively connected to the acquisition line.

2. The data acquisition component for battery cells according to claim 1, characterized in that, The first printed circuit board (1) further includes a first electronic component (13) electrically connected to the first circuit board (10), the first electronic component (13) being arranged at the positive terminal of the first circuit board (10); the second printed circuit board (2) further includes a second electronic component (23) electrically connected to the second circuit board, the second electronic component (23) being arranged at the negative terminal of the second circuit board (20).

3. The data acquisition component for battery cells according to claim 1, characterized in that, The first circuit board (10) is provided with a first acquisition line, and the second circuit board (20) is provided with a second acquisition line. The first acquisition line is located at the positive end of the first circuit board (10), and the second acquisition line is located at the negative end of the second circuit board (20). The antenna bus (4) is wirelessly connected to the first acquisition line and the second acquisition line respectively.

4. The data acquisition component for battery cells according to claim 1, characterized in that, The data acquisition component for the battery cell also includes a limiting structure disposed on the arrangement path of the antenna bus (4) so ​​that the antenna bus (4) is arranged parallel to the acquisition line.

5. The data acquisition component for battery cells according to claim 4, characterized in that, The limiting structure includes: The first limiting member is disposed on the first circuit board (10), and the first acquisition line within the first circuit board (10) is provided with the first limiting member on at least one side; The second limiting member is disposed on the second circuit board (20), and the second limiting member is provided on at least one side of the second acquisition line within the second circuit board (20).

6. The data acquisition component for battery cells according to claim 5, characterized in that, At least one of the first limiting member and the second limiting member includes an elastic mounting member (30), the elastic mounting member (30) is provided with a limiting groove (31), and the antenna bus (4) is engaged in the limiting groove (31).

7. The data acquisition component for battery cells according to claim 6, characterized in that, The elastic mounting member (30) is provided with a protrusion (32), and at least one of the first printed circuit board (1) and the second printed circuit board (2) is provided with a mounting hole. The elastic mounting member (30) is engaged with the mounting hole through the protrusion (32); or, The opening of the limiting groove (31) is provided with a stop (33) to prevent the antenna bus (4) from coming out of the limiting groove (31).

8. The data acquisition component for battery cells according to claim 5, characterized in that, There are two first limiting members, and along the second direction, the first acquisition line and the first electronic component are located between the two first limiting members; and / or, there are two second limiting members, and along the second direction, the second acquisition line and the second electronic component are located between the two second limiting members.

9. The data acquisition component for battery cells according to claim 5, characterized in that, The first limiting member and the first acquisition line are both located at the positive end of the first circuit board (10), and the second limiting member and the second acquisition line are both located at the negative end of the second circuit board (20).

10. The data acquisition component for battery cells according to any one of claims 1 to 9, characterized in that, The first circuit board (10) and / or the second circuit board (20) are provided with through holes for explosion-proof valves to avoid the battery cells.

11. The data acquisition component for battery cells according to any one of claims 1 to 9, characterized in that, The first negative terminal (11) and the first positive terminal (12) are Z-shaped nickel sheets; or, the second negative terminal (21) and the second positive terminal (22) are Z-shaped nickel sheets.

12. The data acquisition component for battery cells according to any one of claims 1 to 9, characterized in that, Both the first negative terminal (11) and the second negative terminal (21) are provided with mounting notches; the data acquisition component for the battery cell also includes a first temperature sensor on the first circuit board (10) and a second temperature sensor on the second circuit board (20). In the vertical direction, the first temperature sensor and the second temperature sensor are respectively located at the corresponding mounting notches.

13. A battery pack, characterized in that, The battery pack includes a battery cell assembly and a data acquisition component for the battery cell according to any one of claims 1 to 12. The battery cell assembly includes a plurality of battery cells (5) arranged sequentially and connected in series along the second direction. In any two adjacent battery cells (5), one battery cell (5) is electrically connected to the first printed circuit board (1), and the other battery cell (5) is electrically connected to the second printed circuit board (2).

14. The battery pack according to claim 13, characterized in that, There are multiple first printed circuit boards (1) and second printed circuit boards (2). The first printed circuit boards (1) and second printed circuit boards (2) are arranged alternately. In two adjacent cells, the positive electrode of the first cell is connected to the negative electrode of the second cell through the first connecting electrode (6). The negative electrode of the first cell is connected to the second connecting electrode (7). The second positive electrode connection terminal is connected to the first connecting electrode (6). The first circuit board is connected to the corresponding second cell. The second negative electrode connection terminal is connected to the second connecting electrode (7).

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