Battery management unit, integrated busbar and battery

Abstract

The utility model relates to the technical field of battery connection, in particular to a battery management unit, an integrated busbar and a battery, and the battery management unit comprises at least one circuit board, an acquisition processing chip and a connector; two ends of the circuit board are respectively provided with a first metal acquisition sheet and a second metal acquisition sheet, the first metal acquisition sheet and the second metal acquisition sheet are respectively used for being connected with a positive electrode and a negative electrode of a battery cell, and the acquisition processing chip is electrically connected with the first metal acquisition sheet and the second metal acquisition sheet; two adjacent circuit boards are electrically connected; the acquisition processing chip is connected with the connector, and the connector is used for connecting a battery management system; the collecting and processing chip is used for collecting temperature data and voltage data of the battery cell, processing the temperature data and the voltage data and then sending the temperature data and the voltage data to the battery management system. The acquisition processing chip is directly integrated on the circuit board, and an additional control board or module is not needed, so that the size and the weight of the whole battery management system are reduced, and the integration level and the structure utilization rate of the system are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery connection, and particularly to a battery management unit, an integrated busbar, and a battery. Background Art

[0002] In the field of energy storage batteries, battery information acquisition is a core function for energy storage safety. Existing battery modules need to be provided with a battery management unit (BMU) to detect the voltage, power, and temperature of the battery module. The BMU is connected to the circuit board in the battery module. When multiple battery modules are serially connected to form a battery cabinet or a battery station, a battery management system (BMS) needs to be set up for large-scale battery management.

[0003] Currently, the connection structures of battery modules on the market mostly adopt the method of cell connection system (CCS) + slave control board + master control board. Among them, the cell connection system usually consists of a blister board, an aluminum bar, a flexible circuit board, nickel sheets, and NTCs, and its main function is to connect between cells and collect battery data such as voltage and temperature; the slave control board acts as a "bridge" connecting individual cells to the entire battery management system and sends the collected voltage and temperature values to the master control board for subsequent processing.

[0004] When multiple battery management units are connected to the battery management system, not only is it necessary to set up slave control boards, occupying a large space, but also the number of structures to be connected is large. During the actual installation process, it is necessary to connect each battery management unit to the battery management system one by one, resulting in a large installation difficulty and low production efficiency. Summary of the Utility Model

[0005] The present disclosure provides a battery management unit, an integrated busbar, and a battery to solve the problems of large installation difficulty and low production efficiency when multiple battery management units are connected to the battery management system in the above-mentioned prior art.

[0006] In a first aspect, the present disclosure provides a battery management unit, including: at least one circuit board, a collection and processing chip, and a connector;

[0007] A first metal collection piece is provided at the first end of the circuit board, and a second metal collection piece is provided at the second end of the circuit board. The first metal collection piece is used to connect to the first pole of the battery cell, and the second metal collection piece is used to connect to the second pole of the battery cell. An on-board circuit is provided on the circuit board, and the collection and processing chip is electrically connected to the first metal collection piece and the second metal collection piece through the on-board circuit;

[0008] The on-board circuits of two adjacent circuit boards are electrically connected;

[0009] The acquisition and processing chip is also connected to the connector through the on-board circuit, and the connector is used to connect to the battery management system;

[0010] The acquisition and processing chip is used to acquire the temperature data and voltage data of the battery cell, process the temperature data and the voltage data, and send the processed temperature data and voltage data to the battery management system.

[0011] In one embodiment, the acquisition and processing chip includes a plurality of first acquisition and processing chips and second acquisition and processing chips;

[0012] The first metal acquisition sheet is electrically connected to the first acquisition and processing chip, the second metal acquisition sheet is electrically connected to the second acquisition and processing chip, and the first acquisition and processing chip and the second acquisition and processing chip are electrically connected through the on-board circuit;

[0013] The first acquisition and processing chip is used to acquire the temperature data and voltage data of the battery cell,

[0014] The second acquisition and processing chip is used to process the temperature data and the voltage data.

[0015] In one embodiment, the circuit board is a flexible circuit board.

[0016] In one embodiment, the flexible circuit board has a first surface and a second surface arranged opposite to each other. The first acquisition and processing chip and the second acquisition and processing chip are respectively arranged on the first surface of the flexible circuit board, and two reinforcing plates are arranged on the second surface of the flexible circuit board. The two reinforcing plates are respectively arranged at positions corresponding to the first acquisition and processing chip and the second acquisition and processing chip on the second surface of the flexible circuit board.

[0017] In one embodiment, the number of the circuit boards is multiple, and adjacent two circuit boards are connected through a connecting part, and at least one connecting hole is formed in the connecting part.

[0018] In one embodiment, a support hole is formed in the connecting part, and a support rib is arranged in the support hole. The first end of the support rib is connected to the side wall of the first end of the support hole, and the second end of the support rib is connected to the side wall of the second end of the support hole. And the first end of the support rib is close to one of the adjacent two circuit boards, and the second end of the support rib is close to the other of the adjacent two circuit boards. The support rib divides the support hole into two connecting holes.

[0019] In one embodiment, the battery management unit further includes:

[0020] An isolation transformer, which is connected to the acquisition and processing chip through the on-board circuit and is used to provide electrical isolation for the acquisition of the cell temperature and voltage by the acquisition and processing chip.

[0021] In a second aspect, the present disclosure provides an integrated busbar, which is characterized by including the battery management unit described in any one of the above embodiments.

[0022] In one embodiment, the integrated busbar further includes an upper housing, a lower housing, and a plurality of connecting tabs. The upper housing and the lower housing are connected, and an installation cavity is formed between the upper housing and the lower housing. Each of the battery management units and each of the connecting tabs are disposed in the installation cavity, and the first metal acquisition sheet and the second metal acquisition sheet are connected to the connecting tabs.

[0023] In a third aspect, the present disclosure provides a battery, which includes a plurality of battery cells and a battery management system, and further includes the above integrated busbar. Each of the battery cells is connected to the battery management system through the integrated busbar.

[0024] A battery management unit, an integrated busbar, and a battery provided by the present disclosure enable the acquisition and processing chip to be conveniently electrically connected to the metal acquisition sheet through the on-board circuit without additional wire connections, improving the convenience and reliability of the connection. The first metal acquisition sheet and the second metal acquisition sheet are directly disposed on the circuit board, facilitating direct connection to the positive and negative electrodes of the battery cells, and using the on-board circuit to realize the connection between the acquisition and processing chip and the metal acquisition sheet, making greater use of the space of the circuit board and improving the structural utilization rate. The on-board circuits of adjacent two circuit boards are electrically connected to realize the cascading of the circuit boards. The connector is used to connect the cascaded battery management systems, enabling the data of multiple battery cells to be uniformly acquired and processed and then sent to the battery management system, simplifying the connection structure between multiple battery management units and the battery management system, reducing the use of external wires, and further improving the compactness and utilization rate of the structure. In summary, since the acquisition and processing chip is directly integrated on the circuit board and connected through the on-board circuit without an additional control board or module, the volume and weight of the entire battery management system are reduced, and the integration degree and structural utilization rate of the system are improved. Description of the Drawings

[0025] In the following, the present disclosure will be described in more detail based on embodiments and with reference to the drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of a battery management unit provided by an embodiment of the present disclosure;

[0027] Figure 2 It is a schematic diagram of the overall structure of an integrated busbar provided by an embodiment of the present disclosure;

[0028] Figure 3 Schematic diagram of the mating relationship between the lower housing of an integrated busbar and the connecting tab provided by an embodiment of the present disclosure;

[0029] Figure 4 Schematic diagram of the mating relationship between the battery management unit of an integrated busbar and the connecting tab provided by an embodiment of the present disclosure.

[0030] Description of reference numerals: 100, circuit board; 110, first metal collection piece; 120, second metal collection piece; 200, collection and processing chip; 210, first collection and processing chip; 220, second collection and processing chip; 300, connector; 400, support hole; 410, support rib; 500, isolation transformer; 600, upper housing; 700, lower housing; 800, connecting tab.

[0031] In the drawings, the same components are denoted by the same reference numerals, and the drawings are not drawn to actual scale. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, and to fully understand how the present disclosure uses technical means to solve technical problems and achieve the corresponding technical effects, and to implement accordingly, the following will combine the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The embodiments of the present disclosure and each feature in the embodiments can be combined with each other without conflict, and the formed technical solutions are all within the protection scope of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0034] Embodiment 1

[0035] As Figure 1 shown, a battery management unit provided by an embodiment of the present disclosure includes: at least one circuit board 100, a collection and processing chip, and a connector 300;

[0036] A first metal collection piece 110 is provided at the first end of the circuit board 100, and a second metal collection piece 120 is provided at the second end of the circuit board 100. The first metal collection piece 110 is used to connect to the first pole of the battery cell, and the second metal collection piece 120 is used to connect to the second pole of the battery cell. An on-board circuit is provided on the circuit board 100, and the acquisition and processing chip is electrically connected to the first metal collection piece 110 and the second metal collection piece 120 through the on-board circuit;

[0037] The on-board circuits of two adjacent circuit boards 100 are electrically connected;

[0038] The acquisition and processing chip is also connected to the connector 300 through the on-board circuit, and the connector 300 is used to connect to the battery management system;

[0039] The acquisition and processing chip is used to collect the temperature data and voltage data of the battery cell, process the temperature data and the voltage data, and send the processed temperature data and voltage data to the battery management system.

[0040] In this embodiment, the first end and the second end of the circuit board 100 may be opposite ends of the circuit board 100. The first metal collection piece 110 and the second metal collection piece 120 are provided at both ends of the circuit board 100. These two metal collection pieces are respectively used to establish connections with the positive electrode and the negative electrode of the battery cell, so as to realize real-time monitoring of data such as the voltage and temperature of the battery cell. In practical applications, it may be that the first metal collection piece 110 is connected to the positive electrode of the battery cell, and the second metal collection piece 120 is connected to the negative electrode of the battery cell, or it may be that the first metal collection piece 110 is connected to the negative electrode of the battery cell, and the second metal collection piece 120 is connected to the positive electrode of the battery cell.

[0041] The materials of the first metal collection piece 110 and the second metal collection piece 120 may be materials with better corrosion resistance and heat transfer ability such as nickel and nickel-based alloys, so as to improve the stability and reliability of measurement. The on-board circuit is integrated on the circuit board 100, and the on-board circuit provides a stable power supply and signal channel for the acquisition and processing chip. As the "brain" of the battery management unit in the embodiment of the present disclosure, the acquisition and processing chip undertakes the tasks of data acquisition, processing and communication, and can be connected to the metal collection piece through the on-board circuit to collect data such as the temperature and voltage of the battery cell in real time. At the same time, the acquisition and processing chip also has data processing capabilities, and can perform processing such as filtering, amplification, and analog-to-digital conversion on the collected data to extract useful information. The processed data will be sent to the connector 300 through the on-board circuit for further analysis and decision-making by the battery management system (Battery Management System, BMS).

[0042] The acquisition and processing chip is connected to the connector 300 through the on-board circuit. The connector 300 is used to connect to the battery management system, so that the cell data collected by the acquisition and processing chips on each circuit board 100 can be sent to the battery management unit through a unified interface (connector 300). Through the unified interface, the acquisition and processing chips on different circuit boards 100 can send data according to the same protocol and standard, ensuring the unity and standardization of the data, which helps the battery management unit process and analyze the data more efficiently.

[0043] The on-board circuits of two adjacent circuit boards 100 are electrically connected to form an integrated busbar as a whole. In the existing battery modules, usually after multiple battery cells are connected in series, it is necessary to install a battery management unit for each battery cell one by one. By this method, the process of manually connecting each battery management unit to each cell in actual installation can be omitted, greatly simplifying the installation process and improving the installation efficiency. The battery management unit of this embodiment adopts a modular design, enabling the on-board circuits on two adjacent circuit boards 100 to be connected to each other to form a huge data acquisition and processing network, which not only improves the accuracy and efficiency of data acquisition, but also enables the battery management unit of this embodiment to more easily adapt to battery systems of different scales and complexities.

[0044] In summary, a battery management unit provided by the present disclosure enables the acquisition and processing chip to be conveniently electrically connected to the metal acquisition sheet through the circuit board 100 through the on-board circuit, without additional wiring, improving the convenience and reliability of the connection. The first metal acquisition sheet 110 and the second metal acquisition sheet 120 are directly arranged on the circuit board 100, facilitating direct connection to the positive and negative electrodes of the cell, and using the on-board circuit to realize the connection between the acquisition and processing chip and the metal acquisition sheet, making greater use of the space of the circuit board 100 and improving the structural utilization rate. The on-board circuits of two adjacent circuit boards 100 are electrically connected to achieve the cascading of the circuit boards 100. The connector 300 is used to connect the cascaded battery management system to the battery management system, enabling the data of multiple cells to be uniformly acquired and processed and then sent to the battery management system, simplifying the connection structure between multiple battery management units and the battery management system, reducing the use of external wires, and further improving the compactness and utilization rate of the structure. In summary, since the acquisition and processing chip is directly integrated on the circuit board 100 and connected through the on-board circuit, without additional control boards or modules, the volume and weight of the entire battery management system are reduced, and the integration degree and structural utilization rate of the system are improved.

[0045] In one embodiment, as Figure 1 shown, the acquisition and processing chip includes a plurality of first acquisition and processing chips 210 and second acquisition and processing chips 220;

[0046] The first metal collection piece 110 is electrically connected to the first collection and processing chip 210, the second metal collection piece 120 is electrically connected to the second collection and processing chip 220, and the first collection and processing chip 210 and the second collection and processing chip 220 are electrically connected through the on-board circuit;

[0047] The first collection and processing chip 210 is used to collect the temperature data and voltage data of the battery cell,

[0048] The second collection and processing chip 220 is used to process the temperature data and the voltage data.

[0049] In this embodiment, the first collection and processing chip 210 can be an Analog Front-End (AFE) chip, and the first metal collection piece 110 and the second metal collection piece 120 are nickel pieces. For example, 4 nickel pieces are used for signal collection for each circuit board 100 or battery cell. 2 pieces are arranged at one end of the circuit board 100 close to the negative electrode of the battery cell for full connection with the negative electrode of the battery cell, and 2 pieces are arranged at one end of the circuit board 100 close to the positive electrode of the battery cell for full connection with the positive electrode of the battery cell, which can ensure that temperature signals can be effectively collected from both the positive and negative electrodes of the battery cell, so as to provide more comprehensive and accurate temperature data. The number of the first collection and processing chips 210 is 4, which are respectively used for grounding, sampling, and power supply. The 4 first collection and processing chips 210 are arranged at one end of the circuit board 100 close to the negative electrode of the battery cell; the second collection and processing chip 220 can also be an AFE chip, and 1 AFE chip is arranged at one end of the circuit board 100 close to the positive electrode of the battery cell.

[0050] Since the area of the negative electrode grounding is the largest, it helps to reduce the influence of electromagnetic interference on the temperature signal. At the same time, the negative electrode grounding can also realize the short path of the collection loop, further reducing the loss and distortion of the signal during transmission. Therefore, the first collection and processing chip 210 is arranged at one end of the circuit board 100 close to the negative electrode of the battery cell, so that the first collection and processing chip 210 can obtain a more stable and accurate reference level, thereby improving the accuracy of temperature signal collection. In addition to the 4 AFE chips placed at the negative electrode, there is also 1 AFE chip, that is, the second collection and processing chip 220, which is placed in the area of the circuit board 100 close to the positive electrode of the battery cell. Such a layout can make the layout of the entire BMS system more reasonable and compact. At the same time, the positive AFE chip (the second collection and processing chip 220) can also monitor the temperature near the positive electrode, providing more data support for battery management.

[0051] In one embodiment, the circuit board 100 is a flexible circuit board.

[0052] In this embodiment, a flexible circuit board is used to replace the traditional circuit design to connect the input, output, and series connectors 300 of the battery pack. During the use of the battery, the battery will deform to a certain extent due to the phenomenon of thermal expansion and contraction. After the circuit board 100 is set as a flexible circuit board, the circuit board 100 can better adapt to the deformation of the battery cell, reduce the stress generated on the circuit board 100 after the battery deforms, better protect the stability of the circuit structure, and improve the stability of the connection between the first metal collecting piece 110 and the second metal collecting piece 120 and the electrode post of the battery cell.

[0053] In addition, the flexible circuit board has the characteristics of light weight and thin thickness. Compared with the traditional wire harness or rigid circuit board 100, it can greatly reduce the weight of the battery management system, which is especially beneficial for application scenarios that pursue lightweight, such as new energy vehicles.

[0054] In one embodiment, the flexible circuit board has a first surface and a second surface arranged opposite to each other. The first acquisition and processing chip 210 and the second acquisition and processing chip 220 are respectively arranged on the first surface of the flexible circuit board. Two reinforcing plates are arranged on the second surface of the flexible circuit board, and the two reinforcing plates are respectively arranged at positions corresponding to the first acquisition and processing chip 210 and the second acquisition and processing chip 220 on the second surface of the flexible circuit board.

[0055] In this embodiment, the reinforcing plates provide mechanical support for the circuit board 100 and increase the rigidity and strength of the flexible circuit board. In actual use, the connection between the circuit board 100 and the electrode post of the battery cell will be affected by external forces. For example, when the working environment of the circuit board 100 is a vibration environment, the vibration will bring stress impact to the connection between the circuit board 100 and the electrode post of the battery cell, especially the stress around the first metal collecting piece 110, the first acquisition and processing chip 210, the second metal collecting piece 120, and the second acquisition and processing chip 220 will be more obvious. By adding reinforcing plates in this part of the area, the mechanical strength of this area can be enhanced to prevent damage caused by multiple bends or external forces.

[0056] By setting the reinforcing plates, not only the connection stability of the key connection parts is improved, but also the overall flexibility of the flexible circuit board is not affected, so that the circuit board 100 of this embodiment can disperse stress through deformation and is not easily loosened due to excessive bending of the connection structure, further improving the stability of the circuit connection.

[0057] In one embodiment, as Figure 1 shown, the number of the circuit boards 100 is multiple, and adjacent two circuit boards 100 are connected by a connecting part, and at least one connecting hole is formed in the connecting part.

[0058] In this embodiment, the connection hole plays the role of a "buffer zone" in the physical structure. The connection hole can effectively reduce the area of the connection part, making the connection part easier to bend and deform. When external stress acts on the flexible circuit board or the connection part, the connection hole can provide a certain deformation space, thereby absorbing and dispersing part of the stress and preventing the stress concentration from directly damaging the circuit board 100. Actually, opening the connection hole reduces the local constraint of the material, enabling the circuit board 100 to deform more smoothly when subjected to external forces, rather than generating excessive stress concentration at a certain point or in a certain area.

[0059] Meanwhile, the existence of the connection hole enables the stress to be redistributed during the transmission process, such that the stress that might originally concentrate at one point will be dispersed over a larger area when passing through the connection hole, thereby reducing the risk of local damage.

[0060] In one embodiment, as Figure 1 shown, a support hole 400 is formed in the connection part. A support rib 410 is arranged in the support hole 400. The first end of the support rib 410 is connected to the side wall of the first end of the support hole 400, and the second end of the support rib 410 is connected to the side wall of the second end of the support hole 400. Moreover, the first end of the support rib 410 is close to one of the two adjacent circuit boards 100, and the second end of the support rib 410 is close to the other of the two adjacent circuit boards 100. The support rib 410 divides the support hole 400 into two connection holes.

[0061] In this embodiment, the direction of the first end of the support hole 400 is the same as the direction of the first end of the circuit board 100, and the direction of the second end of the support hole 400 is the same as the direction of the second end of the circuit board 100. The support hole 400 is similar to the connection hole in the above embodiment. By arranging the support rib 410 in the support hole 400, with the first end of the support rib 410 close to one of the two adjacent circuit boards 100 and the second end of the support rib 410 close to the other of the two adjacent circuit boards 100, the support rib 410 is inclined on the side wall of the connection hole, making the connection part form a cantilever structure similar to an "S" shape or a "Z" shape.

[0062] The geometric shape structure of the S-shaped cantilever has an important influence on the tensile performance of the circuit board 100. By adjusting the width and shape of the cantilever, its lateral stiffness and strength can be improved, thereby enhancing the tensile capacity. Adopting a certain arc design to reduce stress concentration helps to disperse the tensile force and reduce the influence caused by the pulling of the flexible circuit board after the thermal expansion of the single cell in the battery pack.

[0063] The S-shaped cantilever structure can disperse stress throughout the structure, reducing the occurrence of stress concentration. Compared with the traditional straight-shaped cantilever structure, the S-shaped form can better disperse and buffer tensile forces, reduce local stress, improve the overall tensile capacity, increase flexibility and bending ability, making it more adaptable to the action of external tensile forces. This flexibility can reduce the risk of stress concentration and local damage, improving the toughness and durability of the structure. It enables the cantilever to better resist deformation and displacement caused by tensile forces, enhancing the overall tensile performance. Moreover, since the support rib 410 gradually inclines from the first end to the second end of the support hole 400 in the direction of approaching one circuit board to approaching the other circuit board, the support rib 410 is inclined to the arrangement direction of the circuit boards. In this way, when the support rib 401 is subjected to tensile or compressive forces, it can cause the forces to generate component forces in two directions perpendicular and parallel to the arrangement direction of the circuit boards, thereby further better dispersing and buffering tensile forces, reducing local stress, improving the overall tensile capacity, increasing flexibility and bending ability, and making it more adaptable to the action of external tensile forces.

[0064] The first end of the support rib 410 is connected to the side wall of the first end of the support hole 400, and the second end of the support rib 410 is connected to the side wall of the second end of the support hole 400, restricting the deformation range of the S-shaped cantilever structure, enhancing the connection stability of the connection part, and making the connection between the circuit boards 100 more reliable.

[0065] In one embodiment, as Figure 1 shown, the battery management unit further includes:

[0066] An isolation transformer 500, which is connected to the acquisition and processing chip through the on-board circuit and is used to provide electrical isolation between the acquisition of the cell temperature and voltage by the acquisition and processing chip.

[0067] Generally, directly connecting the battery cells and the acquisition and processing chip may cause electrical safety problems, especially when abnormal conditions occur in the battery cells. To solve this problem, an isolation transformer 500 is provided in this embodiment. The isolation transformer 500 is connected between the monitoring circuit of the battery cells and the acquisition and processing chip. Through the isolation transformer 500, the temperature and voltage signals of the battery cells can be safely transmitted to the acquisition and processing chip without causing damage to the acquisition and processing chip due to electrical faults (such as short circuits, overvoltages, etc.) of the battery cells. At the same time, the isolation transformer 500 can also effectively eliminate or reduce electrical noise, improving the accuracy and stability of signal transmission.

[0068] Embodiment Two

[0069] The present disclosure provides an integrated busbar, including the battery management unit described in any one of the above embodiments.

[0070] Compared with the common CCS + BMU + wiring harness solution in the current market, this embodiment provides an integrated busbar that can be used as an upgraded battery cell connection system. The integrated busbar includes the battery management unit in the above embodiment, that is, the integrated busbar in this embodiment integrates the functions of signal acquisition and processing, greatly reducing the complexity of installation and wiring and improving the installation efficiency. In this embodiment, the integrated busbar includes the battery management unit of any of the above embodiments, and the circuit boards of each battery management unit are arranged in sequence and connected to each other. In this way, compared with the traditional integrated busbar, the wiring harness between the integrated busbar and the BMU is omitted, making the connection simpler and the structure more concise.

[0071] In one embodiment, as Figure 2 and Figure 4 shown, the integrated busbar further includes an upper housing 600, a lower housing 700 and a plurality of connecting tabs 800. The upper housing 600 and the lower housing 700 are connected, and an installation cavity is formed between the upper housing 600 and the lower housing 700. Each battery management unit and each connecting tab 800 are arranged in the installation cavity, and the first metal collecting piece 110 and the second metal collecting piece 120 are connected to the connecting tab 800.

[0072] The first end of the connecting tab 800 is used to connect to the negative electrode of the first battery cell, and the second end is used to connect to the positive electrode of the second battery cell, so as to connect the battery monomers in series. In this embodiment, both the upper housing 600 and the lower housing 700 are plastic suction brackets, and the connecting tab 800 can be selected as a connecting aluminum tab.

[0073] As Figure 3 shown, specifically, a plurality of first positioning posts and a plurality of second positioning posts are provided on the surface of the lower housing 700 facing the upper housing 600. A first positioning hole is provided on the connecting tab 800, and the first positioning post is inserted into the first positioning hole in a matching manner, so as to fix the connecting tab 800 in the lower housing 700, so as to connect to the pole column of the battery more quickly.

[0074] As Figure 4 shown, a second positioning hole is provided on the circuit board 100, and the second positioning post is inserted into the second positioning hole in a matching manner to connect the first metal collecting piece 110 and the second metal collecting piece 120 on the circuit board 100 to the first end and the second end of the connecting tab 800 respectively. When the connecting tab 800 is connected to the pole column of the battery, the battery management unit can collect data such as the voltage and temperature of the battery cell. In the integrated busbar of this embodiment, the signal acquisition chip is arranged on the integrated busbar, reducing the current transfer wires and connectors for connecting the integrated busbar to the slave control BMU (battery signal management system) to the master control, omitting the slave control board and the housing, and reducing the production and assembly difficulty and cost.

[0075] Embodiment III

[0076] The present disclosure provides a battery, which includes a plurality of battery cells and a battery management system, and further includes the above-mentioned integrated busbar. Each of the battery cells is connected to the battery management system through the integrated busbar. The battery of this embodiment has a high space utilization rate, and the overall energy density of the product is also higher, enabling a longer battery life. At the same time, it can also make the battery smaller and lighter in volume and weight, and is suitable for a wider range of application scenarios.

[0077] It should be noted that in the present disclosure, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0078] Although the embodiments disclosed in the present disclosure are as above, the above content is only an embodiment adopted for the convenience of understanding the present disclosure, and is not intended to limit the present disclosure. Any person skilled in the art within the technical field to which the present disclosure pertains may make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed in the present disclosure. However, the scope of patent protection of the present disclosure shall still be subject to the scope defined by the appended claims.

Claims

1. A battery management unit, characterized in that: include: At least one circuit board, an acquisition processing chip and a connector; A first metal collection sheet is provided at the first end of the circuit board, and a second metal collection sheet is provided at the second end of the circuit board. The first metal collection sheet is used to be connected to the first pole of the battery cell, and the second metal collection sheet is used to be connected to the second pole of the battery cell. An onboard circuit is provided on the circuit board, and the collection and processing chip is electrically connected to the first metal collection sheet and the second metal collection sheet through the onboard circuit. The onboard circuits of two adjacent circuit boards are electrically connected; The acquisition processing chip is also connected to the connector through the onboard circuit, and the connector is used to connect to the battery management system; The acquisition and processing chip is used to acquire temperature data and voltage data of the battery cell, process the temperature data and the voltage data, and send the processed temperature data and the voltage data to the battery management system.

2. The battery management unit according to claim 1, characterized in that: The acquisition processing chip includes a plurality of first acquisition processing chips and a second acquisition processing chip; The first metal collection sheet is electrically connected to the first collection processing chip, the second metal collection sheet is electrically connected to the second collection processing chip, and the first collection processing chip and the second collection processing chip are electrically connected via the onboard circuit; The first acquisition processing chip is used to collect temperature data and voltage data of the battery cell. The second acquisition and processing chip is used to process the temperature data and the voltage data.

3. The battery management unit according to claim 2, characterized in that: The circuit board is a flexible circuit board.

4. The battery management unit according to claim 3, characterized in that: The flexible circuit board has a first surface and a second surface arranged opposite to each other, the first acquisition processing chip and the second acquisition processing chip are respectively arranged on the first surface of the flexible circuit board, and two reinforcing plates are respectively arranged on the second surface of the flexible circuit board at positions corresponding to the first acquisition processing chip and the second acquisition processing chip.

5. The battery management unit according to claim 1, characterized in that: There are multiple circuit boards, and two adjacent circuit boards are connected via a connecting portion, wherein the connecting portion is provided with at least one connecting hole.

6. The battery management unit according to claim 5, characterized in that: The connecting portion defines a supporting hole, and a supporting rib is disposed in the supporting hole. The first end of the supporting rib is connected to the side wall of the first end of the supporting hole, and the second end of the supporting rib is connected to the side wall of the second end of the supporting hole. The first end of the supporting rib is close to one of the two adjacent circuit boards, and the second end of the supporting rib is close to the other of the two adjacent circuit boards. The supporting rib divides the supporting hole into two connecting holes.

7. The battery management unit according to any one of claims 1 to 6, characterized in that: The battery management unit also includes: An isolation transformer is connected to the acquisition processing chip through the onboard circuit and is used to provide electrical isolation between the temperature and voltage of the acquisition core of the acquisition processing chip.

8. An integrated busbar, characterized in that: Comprising a battery management unit as claimed in any one of claims 1-7.

9. The integrated busbar according to claim 8, characterized in that: It also includes an upper shell, a lower shell and a plurality of connecting bars, the upper shell and the lower shell are connected, an installation cavity is formed between the upper shell and the lower shell, each battery management unit and each connecting bar is arranged in the installation cavity, and the first metal collection plate and the second metal collection plate are connected to the connecting bar.

10. A battery comprising a plurality of cells and a battery management system, characterized in that: It also includes the integrated busbar as claimed in claim 9, and each of the battery cells is connected to the battery management system through the integrated busbar.

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