Flexible circuit board, battery pack and electric equipment

Abstract

The utility model discloses a flexible circuit board, a battery pack and electric equipment, and relates to the technical field of battery packs, and the flexible circuit board comprises an interface part, a first main body, a second main body, at least one voltage acquisition member and at least one temperature acquisition member. The interface part is provided with a connection interface which is connected to the battery management system. The first main body and the second main body are arranged on the same side of the interface part and are arranged at an interval; and the voltage acquisition part is mounted on the first main body and / or the second main body, can be connected to the battery cell assembly, and is used for acquiring voltage parameters. And the temperature acquisition part is mounted on the first main body and / or the second main body, can be connected to the battery cell assembly, and is used for acquiring temperature parameters. The battery cell assembly has certain fool-proof performance, voltage parameters and temperature parameters of different positions in the battery cell assembly can be effectively detected or monitored in real time, safe operation of the battery cell assembly is guaranteed, and safety risks are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a flexible circuit board, a battery pack, and an electrical device. Background Art

[0002] A battery cell consists of a cell housing and an electrode assembly, which is housed within the cell housing. The electrode assembly is the smallest unit in a battery that undergoes electrochemical reactions.

[0003] In the related art, after multiple battery cells are electrically connected to form a battery module, each battery module has a positive lead-out electrode tab and a negative lead-out electrode tab. The positive lead-out electrode tab is equivalent to the total positive of the battery module, and the negative lead-out electrode tab is equivalent to the total negative of the battery module. Different battery modules are connected through a connecting bar, one end of the connecting bar is connected to the positive lead-out electrode tab of a battery module, and the other end is connected to the negative lead-out electrode tab of another battery module. The connecting bar is connected to the positive lead-out electrode tab.

[0004] However, battery cells usually have certain safety hazards, especially in the event of abnormal voltage or temperature, there is a risk of explosion. The existing battery cells do not monitor voltage and temperature comprehensively enough. Utility Model Content

[0005] The present application provides a flexible circuit board, a battery pack and an electrical device, which have certain fool-proof performance and can effectively detect or monitor the voltage parameters and temperature parameters at different positions in the battery cell assembly in real time, thereby ensuring the safe operation of the battery cell assembly and reducing safety risks.

[0006] In a first aspect, the present application provides a flexible circuit board, which includes an interface portion, a first body, a second body, at least one voltage collection component, and at least one temperature collection component.

[0007] The interface portion has a connection interface, and the connection interface can be connected to a battery management system.

[0008] The first body and the second body are respectively connected to the interface portion. The first body and the second body are arranged on the same side of the interface portion, and the first body and the second body are arranged at intervals.

[0009] At least one voltage collection component is installed on the first body and / or the second body. The voltage collection component can be connected to the battery cell assembly. The voltage collection component is used to collect voltage parameters at corresponding positions of the battery cell assembly.

[0010] At least one temperature collecting component is installed on the first body and / or the second body. The temperature collecting component can be connected to the battery core assembly. The temperature collecting component is used to collect temperature parameters at corresponding positions of the battery core assembly.

[0011] The flexible circuit board mentioned above in the present application includes multiple key parts such as an interface part, a first main body, a second main body, at least one voltage collection component and at least one temperature collection component.

[0012] The interface portion of the flexible printed circuit board provides a connection interface, connecting the flexible printed circuit board to the battery management system. This interface requires dedicated wires, and the type of connection interface can be selected as needed, not limited to the example shown in the accompanying figures. Through this connection interface, the flexible printed circuit board can establish communication with the battery management system, enabling the power management system to effectively control or monitor the power and temperature acquisition components on the flexible printed circuit board in real time.

[0013] The first and second bodies of the flexible circuit board are connected to the interface. These two bodies are located on the same side of the interface and spaced apart, providing a wiring framework for the flexible circuit board. This arrangement creates a "U"-shaped structure for the entire flexible circuit board. This arrangement not only enhances the overall stability of the flexible circuit board but also allows it to better adapt to battery cell assemblies containing more battery cells.

[0014] At least one voltage acquisition component is provided on the flexible circuit board and is mounted on the first body and / or the second body, with a corresponding number of voltage acquisition components provided on the first and second bodies as needed. The voltage acquisition component is configured to be connected to the battery cell assembly and used to acquire voltage parameters at specific locations in the battery cell assembly. Through the function of the voltage acquisition component, the voltage parameters at various locations in the battery cell assembly can be accurately detected or monitored in real time to ensure the normal operation of the battery cell assembly.

[0015] In some examples, a pressing member is provided on the side of the temperature collection member facing away from the battery cell assembly. The pressing member is partially connected to the tab. The tab cooperates with the pressing member to press the temperature collection member to the surface to be measured of the battery cell assembly.

[0016] The pressing element is used to press the temperature sensor, ensuring it fits tightly against the surface of the battery cell assembly where temperature monitoring is required. The tab provides a stable connection between the tab and the battery cell assembly, applying a stable compressive force to the pressing element, ensuring a tight fit between the temperature sensor and the surface.

[0017] In some examples, the pressing member includes a first connecting portion, an extending portion, and a second connecting portion that are integrally arranged, the first connecting portion and the second connecting portion are respectively arranged on both sides of the extending portion, and the extending portion extends relative to the tab toward the battery cell assembly.

[0018] The first connecting portion is fixedly connected to the bar, and the second connecting portion is connected to or abuts against the temperature collecting component.

[0019] After the first connecting portion, the extension portion and the second connecting portion are integrally arranged, they can have higher stability and reliability. The first connecting portion, the extension portion and the second connecting portion can also be connected in sequence as needed.

[0020] The first connecting portion is fixedly connected to the tab, allowing for better integration with the tab and facilitating the application of force to the entire pressing member. The second connecting portion is used to connect to or abut the temperature collection member, pressing and limiting the temperature collection member through the second connecting portion. The extension portion is disposed between the first and second connecting portions, and the tab is used to apply force to the second connecting portion to press against the temperature collection member, ensuring the stability and reliability of the temperature collection member.

[0021] In some examples, the extension portion is an elastic structure. After the temperature collection component is assembled, the elastic structure can apply a continuous compressive elastic pre-tightening force toward the temperature collection component through the second connecting portion.

[0022] The extension part of the elastic structure can have better connection stability, and the characteristics of the elastic structure can be utilized to conveniently apply an elastic pre-tightening force to the second connection part to compress the temperature collection part. The elastic pre-tightening force can make the force exist continuously, ensuring that the compression part still has sufficient elastic pre-tightening force when vibration occurs.

[0023] In some examples, the voltage collection component is connected to a bar, and the battery cell assembly includes multiple bars, each of which is connected to a voltage collection component, and some of the bars are connected to temperature collection components.

[0024] The setting of the bar can electrically connect two adjacent battery cells. The bar can simultaneously connect the poles or ears of two battery cells. The combination of multiple bar can realize the series or parallel connection of multiple battery cells.

[0025] Each battery cell is connected to a voltage sensor, which can detect the corresponding voltage parameters of each battery cell to ensure the safety and reliability of the battery cell assembly. Some battery cells are connected to temperature sensors, which can monitor the temperature changes of some battery cells to facilitate risk assessment of the battery cell assembly.

[0026] In some examples, the battery cell assembly includes multiple groups of battery cell units, and the temperature collection components are connected to the tabs corresponding to the first and last two battery cell units in each group of battery cell units.

[0027] After some of the chips are connected to temperature collection components, the temperature changes of some battery cells can be monitored through the temperature collection components to facilitate risk assessment of the battery cell assembly. The temperature of the first battery cell in each group of battery cells is usually the lowest temperature battery cell, and the temperature of the last battery cell in each group of battery cells is usually the highest temperature battery cell. By comparing the temperature changes of the first and last battery cells in each group of battery cells and the temperature difference between the two, the overall condition of the battery cells can be detected. This can be achieved with a minimum number of temperature collection components to detect the condition of the battery cells.

[0028] In some examples, a first clearance groove is provided on the flexible circuit board, and the voltage collection component is provided in the first clearance groove, and the voltage collection component can move in the first clearance groove.

[0029] The first side of the voltage collection component is connected to the first clearance groove through the first adjustment part, and the second side of the voltage collection component is connected to the first clearance groove through the easily detachable part. When the position of the voltage collection component needs to be adjusted, the easily detachable part is cut off and the first adjustment part is bent to adjust the position of the voltage collection component in the first clearance groove.

[0030] The flexible circuit board is provided with a corresponding number of first clearance grooves. Their primary function and purpose is to provide a dedicated mounting space for the voltage collector to be properly positioned. This allows the voltage collector to be positioned in a specific area of ​​the flexible circuit board, ensuring that it can effectively perform its function.

[0031] Specifically, the voltage collector is placed in the first clearance slot. To ensure that the position of the voltage collector in the first clearance slot is flexible and adjustable, the voltage collector is not just a static component, but a dynamic component that can move and adjust to a certain extent within the first clearance slot.

[0032] In some examples, a second clearance groove is provided on the flexible circuit board, and the temperature collection component is provided in the second clearance groove. The temperature collection component is connected to the groove wall of the second clearance groove through a second adjustment portion, and the temperature collection component can be moved in the second clearance groove by bending the second adjustment portion.

[0033] The flexible printed circuit board is provided with a second clearance groove. Its primary function is to provide a suitable installation space for the temperature sensor to be properly positioned and secured. The temperature sensor is housed within the second clearance groove, ensuring effective temperature detection. To achieve this, the temperature sensor is connected to the wall of the second clearance groove via a specially designed second adjustment portion.

[0034] This connection allows the temperature sensor to have a certain amount of wiggle room, allowing for fine-tuning based on actual needs. By bending or adjusting the second adjustment portion, the temperature sensor's position within the second clearance slot can be flexibly controlled, ensuring optimal sensing performance during operation. This arrangement not only enhances the temperature sensor's installation flexibility but also ensures its stability and reliability on the flexible printed circuit board.

[0035] In the second aspect, the present application provides a battery pack, including the above-mentioned flexible circuit board and battery cell assembly, the flexible circuit board is provided with at least one voltage collection component and at least one temperature collection component; the battery cell assembly includes a battery cell unit and a bar, the temperature collection component is connected to the battery cell unit, and the voltage collection component is connected to the bar.

[0036] Battery packs with these flexible circuit boards have lower safety risks. Specifically, the flexible circuit boards have certain foolproof properties and can effectively detect or monitor voltage and temperature parameters at different locations in the battery cell assembly in real time, ensuring the safe operation of the battery cell assembly and reducing safety risks.

[0037] In a third aspect, the present application provides an electrical device, comprising the above-mentioned flexible circuit board and a housing, wherein the flexible circuit board is arranged in the housing.

[0038] When a battery pack with the aforementioned flexible circuit board is installed in an electrical device, the device's safety risks are reduced. Specifically, the flexible circuit board has certain foolproof properties and can effectively detect or monitor voltage and temperature parameters at different locations within the battery cell assembly in real time, ensuring the safe operation of the battery cell assembly and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in this application or the prior art, the following briefly introduces the drawings required for use in the examples or descriptions of the prior art. Obviously, the drawings described below are only some examples of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 This is a structural diagram of a flexible circuit board in an example of this application.

[0041] Figure 2 This is an enlarged schematic diagram of the structure of the interface portion of the flexible circuit board at point A in an example of this application.

[0042] Figure 3 This is an enlarged schematic diagram of the structure of the temperature collection component at position B of the flexible circuit board in an example of this application.

[0043] Figure 4This is an enlarged schematic diagram of the structure of the voltage collection component at position C of the flexible circuit board in an example of this application.

[0044] Figure 5 This is a structural diagram of an inverted assembly of a battery pack in an example of the present application.

[0045] Figure 6 This is a schematic diagram of the structure of the battery pack box after it is opened in an example of this application.

[0046] Figure 7 This is an enlarged schematic diagram of the structure of the battery pack in an example of this application when the voltage collection component and temperature collection component at D are coordinated with the battery cell assembly.

[0047] Reference numerals:

[0048] 100, flexible circuit board; 110, interface part; 111, connection interface; 112, fixing structure; 120, first main body; 130, second main body; 140, first make way groove; 150, second make way groove; 200, voltage collection component; 210, first adjustment part; 220, easily detachable part; 300, temperature collection component; 310, second adjustment part; 400, battery cell assembly; 410, battery cell unit; 420, tab; 500, battery management system; 600, pressing part; 610, first connection part; 620, extension part; 630, second connection part; 700, box body; 710, inverted assembly plate. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain this application and are not intended to limit this application.

[0050] The present application provides a battery pack and an electrical device. The battery pack includes a flexible printed circuit board (FPC) and a battery cell assembly. The flexible printed circuit board is provided with at least one voltage collector and at least one temperature collector. The battery cell assembly includes a battery cell unit and a tab. The temperature collector is connected to the battery cell unit, and the voltage collector is connected to the tab. The electrical device includes the flexible printed circuit board and a housing. The flexible printed circuit board is disposed within the housing. The battery pack can provide power to the electrical device.

[0051] Among them, the above-mentioned electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, energy storage equipment, amusement equipment, elevators and lifting equipment, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.; energy storage equipment can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be carousels, bungee jumping machines, etc. This application does not impose any special restrictions on the above-mentioned electrical equipment.

[0052] For new energy vehicles, the above-mentioned battery pack can be used as a driving power source, thereby replacing fossil fuels to provide driving power.

[0053] The battery pack specifically includes a battery management system (BMS) and a plurality of the above-mentioned battery cells. The plurality of battery cells can be electrically connected in series, in parallel, or in a combination of series and parallel, and communicated with the battery management system to form a battery pack. The battery management system controls and monitors the working status of each battery cell. In addition, the plurality of battery cells can also be connected in series and / or in parallel first, and form a battery module with the module management system, and then the plurality of battery modules can be electrically connected in series, in parallel, or in a combination of series and parallel, and together with the battery management system form a battery pack.

[0054] The multiple cells in the battery pack or battery module can be mounted on a supporting structure such as a box, frame, or bracket. Electrical connections can be made between the cells and between the cells and the battery management system via busbars, such as tabs. The cells can be lithium-ion, sodium-ion, or magnesium-ion batteries, and their outer contours can be cylindrical, flat, rectangular, or other shapes, but are not limited thereto.

[0055] Typically, a battery cell consists of a cell housing and an electrode assembly, which is housed within the cell housing. The electrode assembly is the smallest unit in the battery that undergoes electrochemical reactions, enabling the charging and discharging of the battery cell. It typically includes a positive electrode sheet, a negative electrode sheet, and a separator separating the two. The battery housing is filled with an electrolyte that penetrates the interior of the electrode assembly, providing a pathway for ion migration and conducting electricity.

[0056] In the related art, after multiple battery cells are electrically connected to form a battery module, each battery module has a positive lead-out tab and a negative lead-out tab. The positive lead-out tab is equivalent to the total positive of the battery module, and the negative lead-out tab is equivalent to the total negative of the battery module. Different battery modules are connected by a connecting bar, one end of the connecting bar is connected to the positive lead-out tab of one battery module, and the other end is connected to the negative lead-out tab of another battery module. The connecting bar is connected to the positive lead-out tab. However, battery cells usually have certain safety hazards, especially in the event of abnormal voltage or temperature, there is a risk of explosion. Existing battery cells do not fully monitor voltage and temperature.

[0057] In view of the above problems, please refer to Figure 1-Figure 7 As shown, the embodiment of the present application further provides a flexible circuit board 100. The flexible circuit board 100 of the present application has certain foolproof performance and can effectively detect or monitor the voltage parameters and temperature parameters at different positions in the battery cell assembly 400 in real time, ensuring the safe operation of the battery cell assembly 400 and reducing safety risks.

[0058] Reference Figure 1 In some examples, the flexible circuit board 100 includes an interface portion 110, a first body 120, a second body 130, at least one voltage collector 200, and at least one temperature collector 300. Multiple identical flexible circuit boards 100 can be used in a battery pack.

[0059] Reference Figure 2 The interface portion 110 has a connection interface 111 that can be connected to the battery management system 500. The interface portion 110 is used to connect the entire flexible circuit board 100 to the battery management system 500. The power management system can control or monitor the power acquisition component and temperature acquisition component 300 on the flexible circuit board 100.

[0060] The first and second bodies 120, 130 are respectively connected to the interface portion 110. The first and second bodies 120, 130 are located on the same side of the interface portion 110, and are spaced apart from each other. The first and second bodies 120, 130 form the main structure for wiring the flexible circuit board 100. The two bodies enhance the foolproofing features of the flexible circuit board 100 and enable the flexible circuit board 100 to accommodate a battery assembly 400 having more battery cells 410.

[0061] Reference Figure 3 and Figure 4At least one voltage collector 200 is mounted on the first body 120 and / or the second body 130. The voltage collector 200 can be connected to the battery cell assembly 400 and is used to collect voltage parameters at corresponding positions of the battery cell assembly 400. The voltage collector 200 can detect or monitor the voltage parameters at different positions in the battery cell assembly 400 in real time.

[0062] Reference Figure 3 and Figure 4 At least one temperature sensor 300 is mounted on the first body 120 and / or the second body 130. The temperature sensor 300 can be connected to the battery cell assembly 400 and is used to collect temperature parameters at corresponding locations of the battery cell assembly 400. The temperature sensor 300 can detect or monitor temperature parameters at different locations within the battery cell assembly 400 in real time.

[0063] Specifically, the flexible circuit board 100 mentioned above in the present application includes multiple key parts such as an interface part 110, a first body 120, a second body 130, at least one voltage collection component 200 and at least one temperature collection component 300.

[0064] The interface portion 110 of the flexible printed circuit board 100 provides a connection interface 111, which connects the flexible printed circuit board 100 to the battery management system 500. This connection requires dedicated wires, and the type of connection interface 111 can be selected as needed and is not limited to the example shown in the accompanying drawings. Through this connection interface 111, the flexible printed circuit board 100 can establish communication with the battery management system 500, enabling the power management system to effectively control or monitor the power and temperature acquisition components 300 on the flexible printed circuit board 100 in real time.

[0065] The first body 120 and second body 130 of the flexible circuit board 100 are each connected to the interface portion 110. These two bodies are located on the same side of the interface portion 110 and spaced apart, providing a wiring framework for the flexible circuit board 100. This arrangement creates a "U"-shaped structure for the flexible circuit board 100. This arrangement not only enhances the overall stability of the flexible circuit board 100 but also allows it to better adapt to battery cell assemblies 400 containing a larger number of battery cells 410.

[0066] The flexible circuit board 100 is equipped with at least one voltage collector 200, mounted on the first body 120 and / or the second body 130. A corresponding number of these collectors are provided on each of the first and second bodies 120, 130, as needed. The voltage collector 200 is designed to connect to the battery cell assembly 400 and collect voltage parameters at specific locations within the battery cell assembly 400. This allows for accurate detection or real-time monitoring of voltage parameters at various locations within the battery cell assembly 400, ensuring proper operation of the battery cell assembly 400.

[0067] Similarly, the flexible circuit board 100 is also equipped with at least one temperature sensor 300, which is also mounted on the first body 120 and / or the second body 130. The primary function of the temperature sensor 300 is to connect to the battery cell assembly 400 and collect temperature parameters at specific locations within the battery cell assembly 400. This operation of the temperature sensor 300 enables effective detection or real-time monitoring of temperature parameters at various locations within the battery cell assembly 400, which is crucial for ensuring the safe operation of the battery cell assembly 400.

[0068] The interface portion 110 is provided with a fixing structure 112 that secures the entire interface portion 110 to a corresponding position. For example, in a battery pack, the fixing structure 112 can be fixed to a crossbeam or longitudinal beam within the battery pack, or to a top or bottom guard plate within the battery pack, depending on the specific location.

[0069] The fixing structure 112 may be a fixing plate, and the fixing method of the interface portion 110 and the fixing plate may include fixing with screws and bolts, bonding, riveting, magnetism, clamping, etc.

[0070] The voltage collector 200 and the temperature collector 300 may be disposed on the same side of the flexible circuit board 100 .

[0071] The battery pack of the present application may include a box body 700, which has a accommodating cavity. The flexible circuit board 100, the power management system, and the battery cell assembly 400 can all be assembled in the accommodating cavity. Inverted assembly plates 710 can be provided on both sides of the box body 700. Through the inverted assembly plates 710, the entire battery pack can be inverted and assembled into a corresponding electrical device, such as a vehicle. In the assembled battery pack, the battery cell assembly 400 is inverted, that is, the electrodes, the bar 420 and other structures are located near the bottom, and the bottom here is the bottom close to the road surface when the vehicle is driving normally.

[0072] Reference Figure 3 and Figure 4In some examples, a pressing member 600 is provided on the side of the temperature collection member 300 facing away from the battery cell assembly 400. The pressing member 600 is partially connected to the tab 420. The tab 420 cooperates with the pressing member 600 to press the temperature collection member 300 to the surface to be measured of the battery cell assembly 400.

[0073] The pressing member 600 is configured to press the temperature sensor 300, ensuring that it adheres tightly to the surface of the battery cell assembly 400 to be monitored. The tab 420 provides a stable connection to the battery cell assembly 400, applying a stable compressive force to the pressing member 600, ensuring a tight fit between the temperature sensor 300 and the surface to be monitored.

[0074] The pressing member 600 and the tab 420 can be connected by screw connection, welding, clamping, bonding, riveting, etc., and the specific connection is selected according to actual needs.

[0075] Reference Figure 3 and Figure 4 In some examples, the pressing member 600 includes a first connecting portion 610, an extension portion 620, and a second connecting portion 630 that are integrally arranged. The first connecting portion 610 and the second connecting portion 630 are respectively arranged on both sides of the extension portion 620, and the extension portion 620 extends relative to the bar 420 toward the battery cell assembly 400.

[0076] The first connecting portion 610 is fixedly connected to the tab 420 , and the second connecting portion 630 is connected to or abuts against the temperature collecting member 300 .

[0077] The first connecting portion 610, the extension portion 620 and the second connecting portion 630 are integrally arranged to provide higher stability and reliability. The first connecting portion 610, the extension portion 620 and the second connecting portion 630 can also be connected in sequence as needed.

[0078] The first connecting portion 610 is fixedly connected to the tab 420, allowing for better integration with the tab 420 and facilitating force application to the entire pressing member 600 through the tab 420. The second connecting portion 630 is used to connect to or abut the temperature collection member 300, pressing and limiting the temperature collection member 300 through the second connecting portion 630. The extension portion 620 is disposed between the first connecting portion 610 and the second connecting portion 630, and the tab 420 allows for force applied by the second connecting portion 630 to press against the temperature collection member 300, ensuring stability and reliability of the temperature collection member 300.

[0079] Two first connection parts 610 are provided and cooperate with the extension part 620 to form a "Y"-shaped structure. The first connection part 610 is clamped, welded, screwed or riveted to the tab 420.

[0080] In some examples, the extension portion 620 is an elastic structure. After the temperature collection component 300 is assembled, the elastic structure can apply a continuous compressive elastic pre-tightening force toward the temperature collection component 300 through the second connecting portion 630 .

[0081] The extension part 620 of the elastic structure can have better connection stability, and the characteristics of the elastic structure can be utilized to facilitate the application of elastic pre-tightening force to the second connection part 630 to compress the temperature collection part 300. The elastic pre-tightening force can make the force exist continuously, ensuring that the pressing part still has sufficient elastic pre-tightening force when vibration occurs.

[0082] Specifically, the extension portion 620 can be an elastic structure. When the temperature collection component 300 is assembled, this elastic structure can apply a continuous, elastic pre-tightening force to the temperature collection component 300 through the second connecting portion 630. This arrangement enables the extension portion 620 of the elastic structure to provide better connection stability. By utilizing the characteristics of the elastic structure, an elastic pre-tightening force can be easily applied to the second connecting portion 630 to compress the temperature collection component 300. This elastic pre-tightening force is a continuous force that can ensure that even when the pressing component vibrates or other similar situations occur, sufficient elastic pre-tightening force can still be maintained, thereby ensuring the stability and accuracy of the temperature collection component 300.

[0083] Specifically, the temperature acquisition component 300 includes a thermistor, which is electrically connected to the battery management system 500. This connection ensures that temperature data can be transmitted to the battery management system 500 in real time, thereby achieving real-time monitoring and management of battery temperature.

[0084] Furthermore, both the voltage and temperature sensors 200 and 300 are located on the side of the flexible circuit board 100 facing away from the battery cell assembly 400. This layout helps reduce interference from the battery cell assembly 400 on the sensors, improving the accuracy and reliability of data collection. Furthermore, placing the sensors on the flexible circuit board 100 enhances the overall layout's flexibility and scalability, making the system more compact and efficient.

[0085] Reference Figures 5 to 7 In some examples, the voltage collection component 200 is connected to the bar 420, and the battery cell assembly 400 includes multiple bar 420, each bar 420 is connected to a voltage collection component 200, and some bar 420 are connected to the temperature collection component 300.

[0086] The setting of the bar 420 can electrically connect two adjacent battery cells 410. The bar 420 can simultaneously connect the poles or ears of two battery cells 410. The coordination of multiple bar 420 can realize the series or parallel connection of multiple battery cells 410.

[0087] With a voltage acquisition unit 200 connected to each bar 420, the voltage parameters corresponding to each bar 420 can be detected through the voltage acquisition unit 200 to ensure the safety and reliability of the battery cell assembly 400. With temperature acquisition units 300 connected to some of the bars 420, the temperature changes of some of the battery cells 410 can be monitored through the temperature acquisition units 300 to facilitate risk assessment of the battery cell assembly 400.

[0088] An alarm device can be installed as needed, and the battery management system 500 can be connected to the alarm device. When the temperature sensor 300 detects abnormal temperatures and the battery cell assembly 400 poses an explosion risk, the driver and passengers are promptly notified to evacuate. General abnormalities can be reduced by cooling the temperature or reducing power output.

[0089] Reference Figures 5 to 7 In some examples, the battery cell assembly 400 includes multiple groups of battery cell units 410 , and the temperature collecting member 300 is connected to the tabs 420 corresponding to the first and last two battery cell units 410 in each group of battery cell units 410 .

[0090] After the temperature collection components 300 are connected to some of the bars 420, the temperature collection components 300 can be used to monitor the temperature changes of some of the battery cells 410 to facilitate risk assessment of the battery cell assembly 400. The temperature of the first battery cell 410 in each group of battery cells 410 is generally the battery cell 410 with the lowest temperature, and the temperature of the last battery cell 410 in each group of battery cells 410 is generally the battery cell 410 with the highest temperature. By comparing the temperature changes of the first and last battery cells 410 in each group of battery cells 410 and the temperature difference between the two, the overall condition of the battery cells 410 can be detected. This allows the condition of the battery cells 410 to be detected using a minimum number of temperature collection components 300.

[0091] The above structure can simplify the structure of the flexible circuit board 100, achieve sufficient detection effect with less consumables, and lower the overall cost of the battery pack.

[0092] In some examples, the flexible circuit board 100 is provided with a first clearance groove 140, which is used to provide installation space for the voltage collector 200. The voltage collector 200 is disposed in the first clearance groove 140 and is movable in the first clearance groove 140.

[0093] The first side of the voltage collection component 200 is connected to the first clearance groove 140 through the first adjustment part 210, and the second side of the voltage collection component 200 is connected to the first clearance groove 140 through the easily detachable part 220. When the position of the voltage collection component 200 needs to be adjusted, the easily detachable part 220 is cut off and the first adjustment part 210 is bent to adjust the position of the voltage collection component 200 in the first clearance groove 140.

[0094] The flexible circuit board 100 is provided with a corresponding number of first clearance slots 140. The primary function and purpose of the first clearance slots 140 is to provide a dedicated installation space for the voltage collector 200 to be properly positioned therein. This allows the voltage collector 200 to be positioned in a specific area of ​​the flexible circuit board 100, ensuring that it can effectively perform its function.

[0095] Specifically, the voltage collector 200 is placed in the first clearance groove 140. To ensure that the position of the voltage collector 200 in the first clearance groove 140 has a certain degree of flexibility and adjustability, the voltage collector 200 is not just a static component, but a dynamic component that can move and adjust to a certain extent in the first clearance groove 140.

[0096] To further enhance the ability to adjust the position of the voltage collector 200 within the first clearance slot 140, a first side of the voltage collector 200 is connected to the first clearance slot 140 via a carefully designed first adjustment portion 210. The first adjustment portion 210 allows the user to fine-tune the position of the voltage collector 200 as needed. This allows the user to precisely adjust the specific position of the voltage collector 200 within the first clearance slot 140 based on actual needs, ensuring optimal operation.

[0097] Furthermore, the second side of the voltage collector 200 is connected to the first clearance slot 140 via an easily removable portion 220. This easily removable portion 220 provides a quick disconnect method for greater flexibility when the voltage collector 200's position needs to be adjusted. If the user finds that the voltage collector 200's position needs to be adjusted significantly, they can simply disconnect the easily removable portion 220 and then reposition the voltage collector 200 based on their new needs. Subsequently, by bending the first adjustment portion 210, the user can re-secure the voltage collector 200 in its new position within the first clearance slot 140, achieving precise adjustment of its position.

[0098] By providing the first clearance groove 140 on the flexible circuit board 100, along with the first adjustment portion 210 and the easily removable portion 220, the voltage collector 200 not only moves flexibly within the first clearance groove 140 but also allows for precise position adjustment based on actual needs. This arrangement not only enhances the flexibility of the voltage collector 200's installation and use, but also ensures its high performance and reliability in practical applications.

[0099] Reference Figure 3 and Figure 4 In some examples, the flexible circuit board 100 is provided with a second clearance groove 150 to provide installation space for the temperature sensor 300. The temperature sensor 300 is disposed in the second clearance groove 150 and is connected to the groove wall of the second clearance groove 150 via a second adjustment portion 310. The temperature sensor 300 can be moved within the second clearance groove 150 by bending the second adjustment portion 310.

[0100] The flexible circuit board 100 is provided with a second clearance groove 150. The primary function of this groove 150 is to provide a suitable installation space for the temperature sensor 300 to be properly positioned and secured. The temperature sensor 300 is positioned within this groove 150, ensuring effective temperature measurement. To achieve this, the temperature sensor 300 is connected to the wall of the groove 150 via a specially designed second adjustment portion 310.

[0101] This connection method allows the temperature sensor 300 to have a certain amount of room for movement, allowing for fine-tuning according to actual needs. By bending or adjusting the second adjustment portion 310, the position of the temperature sensor 300 within the second clearance slot 150 can be flexibly controlled, ensuring that the temperature sensor 300 maintains optimal detection performance during operation. This arrangement not only increases the installation flexibility of the temperature sensor 300 but also ensures its stability and reliability on the flexible printed circuit board 100.

[0102] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0103] The above are only preferred examples of this application and are not intended to limit this application. Any modifications, equivalent replacements and improvements made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A flexible circuit board, characterized in that: The flexible circuit board comprises: An interface unit having a connection interface capable of connecting to a battery management system; The first body and the second body are connected to the interface portion respectively, the first body and the second body are arranged on the same side of the interface portion, and the first body and the second body are arranged at a distance; At least one voltage collection component installed on the first body and / or the second body, the voltage collection component can be connected to the battery cell assembly, and the voltage collection component is used to collect voltage parameters at corresponding positions of the battery cell assembly; At least one temperature collecting component is installed on the first body and / or the second body, the temperature collecting component can be connected to the battery cell assembly, and the temperature collecting component is used to collect temperature parameters of corresponding positions of the battery cell assembly.

2. The flexible circuit board according to claim 1, wherein: A pressing piece is provided on the side of the temperature collecting piece facing away from the battery cell assembly. The pressing piece is partially connected to the tab. The tab cooperates with the pressing piece to press the temperature collecting piece to the surface to be measured of the battery cell assembly.

3. The flexible circuit board according to claim 2, wherein: The pressing member includes a first connecting portion, an extending portion, and a second connecting portion that are integrally provided, wherein the first connecting portion and the second connecting portion are respectively provided on both sides of the extending portion, and the extending portion extends relative to the tab toward the battery cell assembly; The first connecting portion is fixedly connected to the bar, and the second connecting portion is connected to or abuts against the temperature collecting component.

4. The flexible circuit board according to claim 3, wherein: The extension portion is an elastic structure. After the temperature collection component is assembled, the elastic structure can apply a continuous compressive elastic pre-tightening force toward the temperature collection component through the second connecting portion.

5. The flexible circuit board according to any one of claims 1 to 4, wherein: The voltage collection component is connected to the bar, and the battery cell assembly includes a plurality of the bar, each of the bar is connected to a voltage collection component, and some of the bar are connected to the temperature collection component.

6. The flexible circuit board according to claim 5, wherein: The battery cell assembly includes multiple groups of battery cell units, and the temperature collection component is connected to the bars corresponding to the first and last two battery cell units in each group of battery cell units.

7. The flexible circuit board according to any one of claims 1 to 4 and 6, wherein: The flexible circuit board is provided with a first paving groove, the voltage collection component is provided in the first paving groove, and the voltage collection component is movable in the first paving groove; The first side of the voltage collection component is connected to the first clearance groove through a first adjustment part, and the second side of the voltage collection component is connected to it through an easily detachable part. When the position of the voltage collection component needs to be adjusted, the easily detachable part is cut off and the first adjustment part is bent to adjust the position of the voltage collection component in the first clearance groove.

8. The flexible circuit board according to any one of claims 1 to 4 and 6, wherein: A second clearance groove is provided on the flexible circuit board, and the temperature collection component is arranged in the second clearance groove. The temperature collection component is connected to the groove wall of the second clearance groove through a second adjustment part, and the temperature collection component can be moved in the second clearance groove by bending the second adjustment part.

9. A battery pack, characterized in that: include: The flexible circuit board according to any one of claims 1 to 8, provided with at least one voltage acquisition component and at least one temperature acquisition component; and, The battery cell assembly includes a battery cell unit and a bar, the temperature collection component is connected to the battery cell unit, and the voltage collection component is connected to the bar.

10. An electrical device, characterized in that: include: The flexible circuit board according to any one of claims 1 to 8; and, A housing is provided in which the flexible circuit board is arranged.

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