Integrated busbar and battery pack

Abstract

The integrated busbar is applied to the battery pack and comprises a substrate, a connecting assembly and a signal acquisition assembly, the connecting assembly is arranged on the substrate and used for being electrically connected with batteries in the battery pack, the signal acquisition assembly comprises an acquisition board and at least one battery management chip, the acquisition board is arranged on the substrate, and the battery management chip is arranged on the acquisition board and used for being electrically connected with the batteries in the battery pack. A connecting circuit is formed on the collecting plate, the connecting circuit is electrically connected to the connecting assembly, the battery management chip is arranged on the collecting plate and electrically connected with the connecting circuit, and the battery management chip is used for managing batteries in the battery pack. The utility model aims to simplify the structure of the battery pack through the integrated busbar, reduce the installation difficulty of the battery pack and improve the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy equipment, in particular to an integrated busbar and battery pack. Background Art

[0002] The integrated busbar is an electrical connection structure inside the battery pack. It is widely used in new energy vehicles, photovoltaic energy storage, wind power generation equipment, data centers and other fields. The integrated busbar can connect multiple battery cells in series and parallel to form a battery pack, and can perform temperature and voltage sampling on the battery cells to protect the battery cells.

[0003] In the related technology, a battery pack needs to be equipped with a battery management unit (BMU) to detect the voltage, power and temperature of the battery pack. The BMU is connected to the wiring harness or FPC (flexible printed circuit board) or FFC (flexible flat cable) or FDC (flexible die-cut circuit board) in the integrated busbar to detect the energy storage status and charging and discharging status of the battery pack. When multiple battery packs are connected in series to form a battery cabinet or battery station, a battery management system (BMS) needs to be set up to perform large-scale battery management.

[0004] However, most existing BMUs are separately arranged circuit board structures, which not only require a separate placement area and installation box, but also need to be electrically connected to the integrated busbar one by one and connected to the BMS, making the overall battery pack structure complex, difficult to install, and having low production efficiency. Utility Model Content

[0005] The main purpose of the utility model is to provide an integrated busbar and battery pack, aiming to simplify the battery pack structure through the integrated busbar, reduce the difficulty of installing the battery pack, and improve production efficiency.

[0006] To achieve the above object, the utility model provides an integrated busbar, which is applied to a battery pack. The integrated busbar comprises:

[0007] substrate;

[0008] A connecting component, the connecting component is arranged on the substrate, and the connecting component is used to electrically connect the batteries in the battery pack; and

[0009] A signal acquisition component, the signal acquisition component includes an acquisition board and at least one battery management chip, the acquisition board is arranged on the substrate, the acquisition board is formed with a connecting circuit, the connecting circuit is electrically connected to the connecting component, the battery management chip is arranged on the acquisition board and is electrically connected to the connecting circuit, and the battery management chip is used to manage the batteries in the battery pack.

[0010] In one embodiment, the acquisition board is one of a printed circuit board PCB, a flexible printed circuit board FPC, or a flexible die-cut circuit board FDC.

[0011] In one embodiment, the battery management chip includes a battery detection unit and a battery management unit, the battery detection unit is electrically connected to the connecting line, the battery detection unit is used to detect the voltage and temperature of the battery, the battery management unit is electrically connected to the battery detection unit, and the battery management unit is used to manage and protect the battery.

[0012] In one embodiment, the battery detection unit includes a voltage acquisition circuit and a temperature acquisition circuit, both of which are electrically connected to the connecting line and to the battery management unit, the voltage acquisition circuit is used to acquire the voltage of the battery, and the temperature acquisition circuit is used to acquire the temperature of the battery.

[0013] In one embodiment, the voltage collection circuit at least includes an isolation chip and a voltage collector, the voltage collector is electrically connected to the connection line, the voltage collector is used to collect the voltage of the battery in the battery pack, the isolation chip is electrically connected to the voltage collector and the battery management unit, and the isolation chip is used to isolate the high-voltage circuit from the low-voltage circuit;

[0014] The temperature acquisition circuit is provided with an NTC temperature sensor, and the NTC temperature sensor is used to detect the temperature of the battery.

[0015] In one embodiment, the battery management unit comprises:

[0016] A charging management module, the charging management module is electrically connected to the voltage acquisition circuit and / or the temperature acquisition circuit, and the charging management module is used to control the charging current and charging time;

[0017] A battery protection module, the battery protection module is electrically connected to the charging management module, and the battery protection module is used to prevent the battery from being overcharged, over-discharged and short-circuited;

[0018] A correction module, the correction module is electrically connected to the battery protection module, and the correction module is used to calibrate a voltage acquisition loop and a temperature acquisition loop;

[0019] A counting module, the counting module is electrically connected to the correction module, and the counting module is used to count the number and time of charge and discharge; and

[0020] A balancing module, the balancing module is electrically connected to the counting module, and the balancing module is used to balance the voltage of the battery.

[0021] In one embodiment, the signal acquisition component further includes a connecting portion, and the connecting portion is electrically connected to the connecting line and the connecting component respectively;

[0022] The connection part is connected to the acquisition board by welding; or the connection part and the acquisition board are integrally formed; or the connection part and the acquisition board are plug-connected.

[0023] In one embodiment, the connection assembly includes a plurality of connector groups, each of the connector groups includes a plurality of serial connectors, and the plurality of serial connectors are spaced apart along a first direction;

[0024] A plurality of the connector groups are arranged in parallel and spaced apart along a second direction, the first direction and the second direction are perpendicular to each other, at least one of the connector groups is electrically connected to the positive pole of a battery in the battery pack, and at least another of the connector groups is electrically connected to the negative pole of a battery in the battery pack.

[0025] In one embodiment, the battery pack includes an input terminal battery and an output terminal battery, and the connection component further includes:

[0026] An input electrode connector, the input electrode connector is electrically connected to the positive electrode of the input end battery, and one of the serial connectors in the connector group is connected to the negative electrode of the input end battery; and

[0027] An output electrode connector is electrically connected to the negative electrode of the output end battery, and one of the serial connectors in another connector group is connected to the positive electrode of the output end battery.

[0028] The utility model also provides a battery module, the battery module comprising:

[0029] a plurality of battery cells; and

[0030] As for the integrated busbar mentioned above, the integrated busbar electrically connects a plurality of the battery cells in series.

[0031] The integrated busbar of the technical solution of the utility model is applied to a battery pack. The integrated busbar is provided with a substrate, which is used to be placed on the top of the battery pack and to install a connecting component and a signal acquisition component. The connecting component is used to be electrically connected to the electrodes of the batteries in the battery pack. The signal acquisition component includes an acquisition board and at least one battery management chip. The acquisition board is arranged on the substrate. The acquisition board is formed with a connecting circuit, which is electrically connected to the connecting component. The battery management chip is arranged on the acquisition board and is electrically connected to the connecting circuit. The battery management chip is used to manage the batteries in the battery pack, so that the battery management chip and the acquisition board are integrated into an integrated structure to perform signal acquisition and management on the batteries. There is no need to separately set up a slave control board and an area and a box body for placing the slave control board, which saves space and simplifies the structure. There is no need to connect the slave control board to the signal acquisition component and the main control board one by one, which improves installation and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the structure of an integrated busbar in an embodiment of the utility model;

[0034] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0035] Figure 3 This is an exploded schematic diagram of an integrated busbar in one embodiment of the utility model;

[0036] Figure 4 This is a module schematic diagram of a battery management chip in one embodiment of the utility model;

[0037] Figure 5 It is a structural schematic diagram of a battery module in one embodiment of the utility model.

[0038] Description of Figure Numbers:

[0039]

[0040]

[0041] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0045] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0046] Please refer to Figures 1 to 5 As shown, to achieve the above-mentioned purpose, the utility model proposes an integrated busbar 100, which is applied to a battery pack. The integrated busbar 100 includes a substrate 1, a connection component 2 and a signal acquisition component 3. The connection component 2 is arranged on the substrate 1, and the connection component 2 is used to electrically connect the batteries in the battery pack. The signal acquisition component 3 includes an acquisition board 31 and at least one battery management chip 32. The acquisition board 31 is arranged on the substrate 1, and the acquisition board 31 forms a connection circuit, which is electrically connected to the connection component 2. The battery management chip 32 is arranged on the acquisition board 31 and is electrically connected to the connection circuit. The battery management chip 32 is used to manage the batteries in the battery pack.

[0047] The integrated busbar 100 (Cells Contact System) in battery technology usually refers to a system that connects and manages individual battery cells 401 in a battery pack. In a battery pack or battery pack, many individual battery cells 401 or battery cells may be included. These units need to be effectively connected together to provide the required voltage and current. The integrated busbar 100 can ensure the stability and effectiveness of this connection. At the same time, a battery management system (Battery Management System, BMS) is usually provided in the battery pack or battery pack to protect the safe use of the battery pack, and to ensure safety and extend the service life of the battery pack during the charging and discharging process of the battery pack. The battery management system provides battery management functions, which include but are not limited to monitoring the status of the battery (for example, the voltage, current, temperature and deformation of the battery), calculating the charge level and capacity of the battery, and controlling the charging, discharging and communication functions of the battery.

[0048] In this embodiment, the substrate 1 is a supporting component of the integrated busbar 100. The substrate 1 is a plastic plate formed by an injection molding process or a vacuum molding process. The connection component 2 and the signal acquisition component 3 are both installed on the substrate 1. The substrate 1 is used to isolate the battery cell 401 and has insulation, protection and flame retardant functions. The substrate 1 includes an upper substrate 1 and a lower substrate 1. The upper substrate 1 and the lower substrate 1 jointly wrap and install the connection component 2 and the signal acquisition component 3.

[0049] It is understandable that if Figures 1 to 3 As shown, a first mounting groove for installing the connecting component 2 and a second mounting groove for installing the signal collecting component 3 are formed on the substrate 1, so that the connecting component 2 can be limitedly set in the first mounting groove, and the signal collecting component 3 can be limitedly set in the second mounting groove, thereby maintaining the relative position between the connecting component 2 and the signal collecting component 3 and improving the connection stability between the two.

[0050] In this embodiment, if Figures 1 to 3 As shown, the connection component 2 is a conductive structure composed of multiple aluminum bus bars. The connection component 2 is electrically connected to the electrodes of the battery cell 401 or the battery core, such as welding. At the same time, the connection component 2 is also electrically connected to the signal acquisition component 3, so that the signal acquisition component 3 can collect performance parameters such as temperature, current and voltage of the battery cell 401 through the connection component 2. The connection component 2 includes an input electrode connector 22, an output electrode connector 23 and a series electrode connector. The input electrode connector 22 and the output electrode connector 23 serve as the input and output ends of the entire battery pack or battery group. The input electrode connector 22 is connected to the positive electrode or negative electrode of the entire battery group, and the output electrode connector 23 is connected to the other electrode of the entire battery group. The series electrode connector is serially connected to the positive electrodes or negative electrodes of different battery cells 401 in sequence to connect multiple battery cells 401 in series in sequence to form a battery group.

[0051] In this embodiment, the integrated busbar 100 also includes a signal acquisition component 3, which includes an acquisition board 31 and at least one battery management chip 32. The acquisition board 31 is a circuit board, and a connecting circuit is formed on the acquisition board 31. The connecting circuit can be formed by physical or chemical etching, or by printing, which is not limited here. The battery management chip 32 is electrically connected to the connecting circuit, and the connecting circuit is electrically connected to each connector in the connection component 2.

[0052] It can be understood that the acquisition board 31 is electrically connected to the connection component 2 through the internal connection line, so as to realize the electrical connection with each battery cell 401. At the same time, the battery management chip 32 is arranged on the acquisition board 31. Through the connection line, the battery management chip 32 can collect the real-time voltage state, current state and temperature state of the battery, and manage the charging and discharging, voltage measurement, current measurement and voltage balancing of the battery. By directly integrating the battery management chip 32 on the acquisition board 31 and unifying it into an integrated structure, the battery management chip 32 is directly integrated into the integrated busbar 100. Such a setting can simplify the structure of the integrated busbar 100 and the entire battery pack. It is no longer necessary to separately set up a slave control board with a battery management chip 32, nor is it necessary to set up an area for placing the slave control board and an installation box body, which effectively saves space and can place more batteries in the saved space, effectively improving the energy density of the battery pack. After eliminating the slave control board, it is no longer necessary to plug and connect the slave control board with the integrated busbar 100 one by one, and plug and connect the slave control board with the main control board one by one, which effectively improves the efficiency of installation and production.

[0053] The integrated busbar 100 of the present technical solution is applied to a battery pack. The integrated busbar 100 is provided with a substrate 1. The substrate 1 is used to be placed on the top of the battery pack and to install a connection component 2 and a signal acquisition component 3. The connection component 2 is used to be electrically connected to the electrodes of the batteries in the battery pack. The signal acquisition component 3 includes an acquisition board 31 and at least one battery management chip 32. The acquisition board 31 is arranged on the substrate 1. The acquisition board 31 forms a connection circuit, which is electrically connected to the connection component 2. The battery management chip 32 is arranged on the acquisition board 31 and is electrically connected to the connection circuit. The battery management chip 32 is used to manage the batteries in the battery pack, so that the battery management chip 32 and the acquisition board 31 are integrated into an integrated structure to perform signal acquisition and management on the battery. There is no need to separately set up a slave control board and an area and a box body for placing the slave control board, which saves space and simplifies the structure. There is no need to connect the slave control board to the signal acquisition component 3 and the main control board one by one, which improves installation and production efficiency.

[0054] In one embodiment, the acquisition board 31 is a printed circuit board PCB, a flexible printed circuit board FPC, or a flexible die-cut circuit board FDC.

[0055] It is understandable that if Figure 3As shown, the acquisition board 31 is used to collect the voltage, current and temperature signals of the battery. The acquisition board 31 can be a traditional wiring harness, or a printed circuit board PCB, or a flexible printed circuit board FPC, or a flexible die-cut circuit board FDC. Among them, the acquisition board 31 is preferably a flexible printed circuit board FPC or a flexible die-cut circuit board FDC. The flexible printed circuit board FPC and the flexible die-cut circuit board FDC are circuit boards made of polyimide or polyester film as a substrate, and connection lines are etched inside. Compared with the wiring harness and the printed circuit board PCB, they are lighter and thinner, and have better bendability and thermal expansion resistance, and can improve the integration, lightweight and regularity of the integrated busbar 100.

[0056] In one embodiment, the battery management chip 32 includes a battery detection unit 321 and a battery management unit 322. The battery detection unit 321 is electrically connected to the connection line. The battery detection unit 321 is used to detect the voltage and temperature of the battery. The battery management unit 322 is electrically connected to the battery detection unit 321. The battery management unit 322 is used to manage and protect the battery.

[0057] It is understandable that if Figure 4 As shown, the battery detection unit 321 and the battery management unit 322 are both present in the battery management chip 32 in the form of circuits. The battery detection unit 321 and the battery management unit 322 are electrically connected to each other and are both electrically connected to the connecting lines. The battery management chip 32 obtains the voltage, current and temperature parameters of the battery through the battery detection unit 321, and the battery detection unit 321 transmits the detection result to the battery management unit 322. The battery management unit 322 can manage the current voltage of the battery to ensure the voltage balance of each battery, and can also manage the entire charging and discharging process, such as avoiding overcharging and over-discharging of the battery, measuring the current and voltage during the charging process, etc., to effectively protect the battery.

[0058] In one embodiment, the battery detection unit 321 includes a voltage acquisition circuit 3211 and a temperature acquisition circuit 3212. The voltage acquisition circuit 3211 and the temperature acquisition circuit 3212 are both electrically connected to the connection line and electrically connected to the battery management unit 322. The voltage acquisition circuit 3211 is used to collect the voltage of the battery, and the temperature acquisition circuit 3212 is used to collect the temperature of the battery.

[0059] In this embodiment, if Figure 4 As shown, the battery management chip 32 includes a voltage acquisition circuit 3211 and a temperature acquisition circuit 3212 , and the battery parameters detected by the acquisition board 31 include the battery voltage and the battery temperature.

[0060] It can be understood that the voltage collection loop 3211 is a voltage detection circuit including a voltage detection element, which is usually electrically connected to the connector in the connection component 2 and the connection line in the collection board 31 to realize the collection of the voltage of the battery cell 401. The input end of the voltage collection loop 3211 is connected to the port in the collection board 31 that is electrically connected to the voltage detection element, and the output end of the voltage collection loop 3211 is connected to the input end of the battery control unit.

[0061] The temperature acquisition circuit 3212 is a temperature detection circuit including a temperature detection element, and the temperature detection element is an NTC thermistor. The temperature of the battery cell 401 near the connection component 2 is detected by the NTC thermistor to detect the temperature of a partial area of ​​the battery pack. The input end of the temperature acquisition circuit 3212 is connected to the sampling port of the NTC thermistor, and the output end of the temperature acquisition circuit 3212 is connected to the input end of the battery control unit.

[0062] At the same time, the voltage acquisition circuit 3211 also includes a power supply unit, which receives a voltage signal through a voltage detection element, converts the received voltage signal, and outputs a corresponding electrical signal to the battery control unit. The temperature acquisition circuit 3212 outputs the corresponding temperature signal as a corresponding electrical signal to the battery control unit to realize the acquisition of voltage and temperature.

[0063] In one embodiment, the voltage acquisition circuit 3211 includes at least an isolation chip and a voltage collector, the voltage collector is electrically connected to the connection line, the voltage collector is used to collect the voltage of the battery in the battery pack, the isolation chip is electrically connected to the voltage collector and the battery management unit 322, and the isolation chip is used to isolate the high-voltage circuit and the low-voltage circuit; the temperature acquisition circuit 3212 is provided with an NTC temperature sensor, and the NTC temperature sensor is used to detect the temperature of the battery.

[0064] It can be understood that the battery pack and battery group include multiple battery cells 401, so their internal voltage is relatively high, and the acquisition board 31 and the battery management chip 32 provided on the acquisition board 31 are operated in a low-voltage state as a whole. Therefore, an isolation chip is required to isolate the high-voltage circuit and the low-voltage circuit through the isolation chip to protect the normal operation of the low-voltage circuit. Usually, the isolation chip is provided with an isolation capacitor, and the isolation capacitor point is connected to the voltage collector and the battery management unit 322. The voltage collector (such as the voltage acquisition chip) converts the collected high-voltage signal into a low-voltage signal and transmits it to the battery management unit 322 to achieve mutual isolation and independent operation.

[0065] It can be understood that the temperature acquisition circuit 3212 usually uses a thermistor or an NTC sensor to achieve temperature acquisition. When in use, the NTC temperature sensor is arranged in the battery pack or placed near the battery pack to collect the battery pack temperature, and the collected temperature signal is transmitted to the battery management unit 322, and the battery charging and discharging is managed and regulated by the battery management unit 322.

[0066] In one embodiment, the battery management unit 322 includes:

[0067] A charging management module 3221, the charging management module 3221 is electrically connected to the voltage acquisition circuit 3211 and / or the temperature acquisition circuit 3212, and the charging management module 3221 is used to control the charging current and charging time;

[0068] A battery protection module 3222, the battery protection module 3222 is electrically connected to the charging management module 3221, and the battery protection module 3222 is used to prevent the battery from being overcharged, over-discharged and short-circuited;

[0069] A correction module 3223, the correction module 3223 is electrically connected to the battery protection module 3222, and the correction module is used to calibrate the voltage acquisition circuit 3211 and the temperature acquisition circuit 3212;

[0070] A counting module 3224, the counting module 3224 is electrically connected to the correction module 3223, and the counting module 3224 is used to count the number and time of charge and discharge; and

[0071] The balancing module 3225 is electrically connected to the counting module 3224 and is used to balance the voltage of the battery.

[0072] It is understandable that if Figure 4 As shown, the charging management module 3221 is used to control the charging parameters of the battery, and the charging parameters include at least the charging current and the charging time; the correction module 3223 is used to correct the current value detected by the battery detection unit 321 according to the current correction coefficient, correct the voltage value detected by the battery detection unit 321 according to the voltage correction coefficient, and regularly correct the current correction coefficient and the voltage correction coefficient according to the measured data to improve the detection accuracy of the battery by the battery detection unit 321; the counting circuit is used to count the number of charge and discharge times and the charge and discharge time of the battery.

[0073] The balancing module 3225 is electrically connected to the battery control unit. Under the control of the battery control unit, the balancing module 3225 performs balancing processing on the voltage of the battery. Specifically, when the battery control unit determines that the voltage of the battery exceeds the preset threshold value based on the obtained battery voltage, the balancing unit is controlled to be connected to the positive and negative electrodes of the battery, so as to consume the power in the battery and achieve the purpose of balancing the battery. When it is determined that the voltage of the current battery does not exceed the preset threshold value based on the obtained battery voltage, the balancing unit is controlled to remain disconnected from the battery and not consume the battery power.

[0074] It can be understood that the battery protection module 3222 is used to protect the battery from overvoltage, overcharge, over-discharge and short circuit. For example, a voltage protection module is provided in the battery protection module 3222. The voltage protection module is provided with a voltage comparator. The voltage comparator is used to detect whether the voltage of the battery is lower than or higher than a certain threshold value so as to perform power protection and reminder. If it is determined that the battery voltage reaches the minimum limit, the battery protection is triggered. Specifically, a preset charging voltage value and a preset discharging voltage value are provided. If the charging voltage exceeds the preset charging voltage value, charging is stopped to prevent the battery from overcharging. If the discharge voltage is lower than the preset discharge voltage, discharging is stopped to avoid over-discharging of the battery.

[0075] By setting the counting module 3224, the correction module 3223, the battery protection module 3222 and the charging management module 3221, the accuracy and comprehensiveness of the battery status data obtained by detection can be further improved, and the battery protection and charging optimization can be achieved, thereby improving the safety and service life of the battery.

[0076] In one embodiment, the signal acquisition component 3 also includes a connecting portion 33, which is electrically connected to the connecting line and the connecting component 2 respectively; wherein the connecting portion 33 is welded and connected to the acquisition board 31; or, the connecting portion 33 and the acquisition board 31 are integrally formed; or, the connecting portion 33 and the acquisition board 31 are plug-connected.

[0077] It is understandable that if Figures 1 to 3 As shown, the connection part 33 is preferably formed integrally with the collection board 31. Such a configuration can reduce the welding or plugging process, and the connection part 33 provided on the collection board 31 can be directly electrically connected to the connection component 2, thereby improving the efficiency of production and processing.

[0078] In one embodiment, the connection component 2 includes a plurality of connector groups 21, each connector group 21 includes a plurality of serial connectors 211, and the plurality of serial connectors 211 are arranged at intervals along a first direction; the plurality of connector groups 21 are arranged in parallel and at intervals along a second direction, the first direction and the second direction are perpendicular to each other, at least one connector group 21 is electrically connected to the positive pole of a battery in the battery pack, and at least another connector group 21 is electrically connected to the negative pole of a battery in the battery pack.

[0079] In this embodiment, if Figure 1 and Figure 3 As shown, each connector group 21 includes multiple serial connectors 211, and the multiple serial connectors 211 are electrically connected to the positive or negative electrodes of multiple batteries along a first direction. The serial connectors 211 connect the positive and negative electrodes of the single batteries in the battery pack. The acquisition board 31 is connected to the multiple serial connectors 211 through the connecting part 33 to achieve electrical connection between the multiple battery cells 401, and enable the battery management chip 32 to obtain the voltage signal and current signal of the battery cell 401.

[0080] Furthermore, multiple connector groups 21 are arranged in a straight line at intervals along a second direction, and the second direction is perpendicular to the first direction, so that the multiple connector groups 21 are parallel to each other, so that the multiple serial connectors 211 in each connector group 21 can connect the positive or negative poles of some battery cells 401, thereby electrically connecting all battery cells 401 in the battery pack in the same series.

[0081] In one embodiment, the battery pack includes an input end battery and an output end battery, and the connecting component 2 also includes an input electrode connector 22 and an output electrode connector 23, the input electrode connector 22 is electrically connected to the positive electrode of the input end battery, a serial connector 211 in the connector group 21 is connected to the negative electrode of the input end battery, the output electrode connector 23 is electrically connected to the negative electrode of the output end battery, and a serial connector 211 in another connector group 21 is connected to the positive electrode of the output end battery.

[0082] It is understandable that if Figure 1 and Figure 3 As shown, the input electrode connector 22, the output electrode connector 23 and the serial connector 211 are made of aluminum alloy with a tin-plated layer on the surface.

[0083] The input electrode connector 22 is connected to the current input electrode of the battery pack, which is the input end battery located at the input end of the battery pack. The output electrode connector 23 is connected to the current output electrode in the battery pack, which is the output end battery located at the output end of the battery pack. The acquisition board 31 connects the input electrode connector 22, the output electrode connector 23 and the serial connector 211 through the connecting part 33 to monitor the voltage and temperature of each battery cell 401. The electrical signal is connected to the battery detection unit 321 through the connecting line of the acquisition board 31. The battery detection unit 321 transmits the voltage and temperature signals of the battery pack to the battery management unit 322 through the electrical signal to realize the monitoring and management of the voltage and temperature of the battery pack.

[0084] The utility model also provides a battery module 400, which includes a plurality of battery cells 401 and the above-mentioned integrated busbar 100, wherein the integrated busbar 100 is electrically connected in series to the plurality of battery cells 401. The specific structure of the integrated busbar 100 refers to the aforementioned embodiment, and since the battery module 400 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0085] Understandable, such as Figure 5 As shown, a battery module 400 may include at least one battery cell 401, that is, a battery module 400 may include one battery cell 401 or multiple battery cells 401. The battery cell 401, also known as the battery cell, is the smallest unit that constitutes the battery module 400. The multiple battery cells 401 are arranged in a rectangular array and fit together. The integrated busbar 100 is arranged on the top of the battery cell 401 and is electrically connected to the electrodes of the battery cell 401 and the serial connector 211, the input electrode connector 22 and the output electrode connector 23 in the connection component 2 to realize the series and parallel connection of multiple battery cells 401.

[0086] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An integrated busbar, used in a battery pack, characterized in that: The integrated busbar comprises: substrate; A connecting component, the connecting component is arranged on the substrate, and the connecting component is used to electrically connect the batteries in the battery pack; and A signal acquisition component, the signal acquisition component includes an acquisition board and at least one battery management chip, the acquisition board is arranged on the substrate, the acquisition board is formed with a connecting circuit, the connecting circuit is electrically connected to the connecting component, the battery management chip is arranged on the acquisition board and is electrically connected to the connecting circuit, and the battery management chip is used to manage the batteries in the battery pack.

2. The integrated busbar according to claim 1, characterized in that: The acquisition board is one of a printed circuit board PCB, a flexible printed circuit board FPC, or a flexible die-cut circuit board FDC.

3. The integrated busbar according to claim 1, characterized in that: The battery management chip includes a battery detection unit and a battery management unit. The battery detection unit is electrically connected to the connection line. The battery detection unit is used to detect the voltage and temperature of the battery. The battery management unit is electrically connected to the battery detection unit. The battery management unit is used to manage and protect the battery.

4. The integrated busbar according to claim 3, characterized in that: The battery detection unit includes a voltage acquisition circuit and a temperature acquisition circuit. Both the voltage acquisition circuit and the temperature acquisition circuit are electrically connected to the connection line and to the battery management unit. The voltage acquisition circuit is used to acquire the voltage of the battery, and the temperature acquisition circuit is used to acquire the temperature of the battery.

5. The integrated busbar according to claim 4, characterized in that: The voltage collection circuit at least includes an isolation chip and a voltage collector, the voltage collector is electrically connected to the connection line, the voltage collector is used to collect the voltage of the battery in the battery pack, the isolation chip is electrically connected to the voltage collector and the battery management unit, and the isolation chip is used to isolate the high-voltage circuit from the low-voltage circuit; The temperature acquisition circuit is provided with an NTC temperature sensor, and the NTC temperature sensor is used to detect the temperature of the battery.

6. The integrated busbar according to claim 4, characterized in that: The battery management unit comprises: A charging management module, the charging management module is electrically connected to the voltage acquisition circuit and / or the temperature acquisition circuit, and the charging management module is used to control the charging current and charging time; A battery protection module, the battery protection module is electrically connected to the charging management module, and the battery protection module is used to prevent the battery from being overcharged, over-discharged and short-circuited; A correction module, the correction module is electrically connected to the battery protection module, and the correction module is used to calibrate a voltage acquisition loop and a temperature acquisition loop; A counting module, the counting module is electrically connected to the correction module, and the counting module is used to count the number and time of charge and discharge; and A balancing module, the balancing module is electrically connected to the counting module, and the balancing module is used to balance the voltage of the battery.

7. The integrated busbar according to claim 1, characterized in that: The signal acquisition component further includes a connecting portion, wherein the connecting portion is electrically connected to the connecting line and the connecting component respectively; The connection part is connected to the acquisition board by welding; or the connection part and the acquisition board are integrally formed; or the connection part and the acquisition board are plug-connected.

8. The integrated busbar according to any one of claims 1 to 7, characterized in that: The connection assembly includes a plurality of connector groups, each of the connector groups includes a plurality of serial connectors, and the plurality of serial connectors are spaced apart along a first direction; A plurality of the connector groups are arranged in parallel and spaced apart along a second direction, the first direction and the second direction are perpendicular to each other, at least one of the connector groups is electrically connected to the positive pole of a battery in the battery pack, and at least another of the connector groups is electrically connected to the negative pole of a battery in the battery pack.

9. The integrated busbar according to claim 8, characterized in that: The battery pack includes an input terminal battery and an output terminal battery, and the connection component also includes: An input electrode connector, the input electrode connector is electrically connected to the positive electrode of the input end battery, and one of the serial connectors in the connector group is connected to the negative electrode of the input end battery; and An output electrode connector is electrically connected to the negative electrode of the output end battery, and one of the serial connectors in another connector group is connected to the positive electrode of the output end battery.

10. A battery pack, characterized in that: The battery pack comprises: a plurality of battery cells; and The integrated busbar according to any one of claims 1 to 9, wherein the integrated busbar electrically connects a plurality of the battery cells in series.

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