Battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model discloses a battery device, an energy storage device and a power utilization device. The power utilization device comprises a battery monomer; the flexible circuit board is used for collecting parameters of the battery monomers, and the flexible circuit board comprises a stress sensing area; the first stress sensing piece is arranged in the stress sensing area, and the first stress sensing piece deforms along with the deformation of the flexible circuit board in the stress sensing area; wherein the first stress sensing piece is electrically connected with the flexible circuit board, and the resistance of the first stress sensing piece is changed along with the deformation of the first stress sensing piece, so that the stability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a battery device, an energy storage device, and an electrical device. Background Art

[0002] In current battery devices, a flexible circuit board is provided to collect parameters inside the battery device. However, the usage environment of the battery device is relatively complex, such as vibrations, swelling of battery cells, etc., which may cause the data collection of the flexible circuit board to fail and affect the stable operation of the battery device.

[0003] Therefore, how to improve the stability of the battery device has become an urgent problem to be solved. Summary of the Utility Model

[0004] Embodiments of the present application provide a battery device, an energy storage device, and an electrical device, which can improve the stability of the battery device.

[0005] In a first aspect, a battery device is provided, including: a battery cell; a flexible circuit board for collecting parameters of the battery cell, the flexible circuit board including a stress sensing area; a first stress sensing member disposed in the stress sensing area and deforming as the flexible circuit board in the stress sensing area deforms; wherein, the first stress sensing member is electrically connected to the flexible circuit board, and the resistance of the first stress sensing member changes as the first stress sensing member deforms.

[0006] In the technical solution provided by the embodiments of the present application, a first stress sensing member is disposed on the surface of the flexible circuit board, and the resistance of the first stress sensing member changes as the first stress sensing member deforms. Thus, when the flexible circuit board deforms, the first stress sensing member on the flexible circuit board can simultaneously feedback deformation data, so that in the case where the deformation of the flexible circuit board exceeds a certain threshold, timely processing can be performed, reducing the possibility of flexible circuit board failures and improving the stability of the battery device.

[0007] In some embodiments, the first stress sensing member includes a flexible layer and a resistance wire layer, the flexible layer is attached to the surface of the stress sensing area, and the resistance wire layer is disposed on the side of the flexible layer away from the stress sensing area.

[0008] In the technical solution provided by the embodiments of the present application, the resistance wire layer of the first stress sensing member is disposed in the stress sensing area through the flexible layer. The flexible layer can transfer deformation and separate the metal resistance wire from the traces of the flexible circuit board, thereby reducing the mutual influence between the traces on the flexible circuit board and the resistance wire layer, improving the accuracy of stress sensing, and further improving the reliability of the battery device.

[0009] In some embodiments, the material of the flexible layer is an insulating material.

[0010] In the technical solution provided by the embodiment of the present application, the flexible layer is made of an insulating material, and traces can also be arranged under the flexible layer, thereby saving the layout space of the flexible circuit board and improving the space utilization rate of the battery device.

[0011] In some embodiments, the size of the resistance wire layer in the length direction of the flexible circuit board is greater than the size of the resistance wire layer in the width direction of the flexible circuit board.

[0012] In the technical solution provided by the embodiment of the present application, the size of the resistance wire layer in the length direction of the flexible circuit board is greater than the size of the resistance wire layer in the width direction of the flexible circuit board. The first stress sensing member is more sensitive to the deformation detection in the length direction of the flexible circuit board, can more easily capture the abnormality of the flexible circuit board, and improves the reliability of the battery device.

[0013] In some embodiments, the flexible circuit board includes a plurality of stress sensing regions, and the first stress sensing members are respectively arranged in the plurality of stress sensing regions.

[0014] In the technical solution provided by the embodiment of the present application, by arranging the first stress sensing members in multiple regions of the flexible circuit board, the accuracy of monitoring the deformation degree of the entire flexible circuit board can be improved, the risk of excessive deformation of the flexible circuit board can be reduced, and the reliability of the battery device is improved.

[0015] In some embodiments, the battery device further includes: a structural member disposed inside the battery device; a second stress sensing member disposed on the surface of the structural member; wherein, the second stress sensing member is electrically connected to the flexible circuit board, and the resistance of the second stress sensing member changes with the deformation of the second stress sensing member.

[0016] In the technical solution provided by the embodiment of the present application, the second stress sensing member is disposed on the surface of the structural member of the battery device, can reflect the deformation degree of the structural member, and can monitor the deformation parameters of the structural member inside the battery device during the entire life cycle of the battery device, so as to judge whether the structural member is fatigued, and further can evaluate the risk of fatigue of the structural member in real time, and can give an early warning in time before the product fails, improving the reliability of the battery device.

[0017] In some embodiments, the shape of the second stress sensing member includes a rectangle, a rhombus, and a hexagon.

[0018] In the technical solution provided by the embodiment of the present application, the size of the second stress sensing member in the length direction of the steel strip is greater than the size of the second stress sensing member in the width direction of the steel strip. The second stress sensing member is more sensitive to the deformation detection in the length direction of the steel strip, can more easily capture the abnormality of the steel strip, and improves the reliability of the battery device.

[0019] In some embodiments, the battery device includes a box body, and the structural member includes: a cross beam that connects opposite walls of the box body, and a second stress sensing member disposed on the surface of the cross beam; wherein, the second stress sensing member includes a group of first resistance wires parallel to a first direction and a group of second resistance wires parallel to a second direction, the first resistance wires are insulated from the second resistance wires, the first direction and the second direction are parallel to the surface of the cross beam and the first direction and the second direction are perpendicular to each other.

[0020] In some embodiments, battery cells are disposed in the battery device, and the flexible circuit board further includes: a temperature interface for acquiring temperature data of the battery device; and a voltage interface for acquiring voltage data of the battery cells.

[0021] In the technical solution provided by the embodiments of the present application, when resistance wires in different directions are disposed on the surface of the cross beam of the battery device, the force condition of the cross beam can be monitored more accurately, which is beneficial to accurately judging the stress information received by the cross beam and improving the stability of the battery device.

[0022] In a second aspect, a energy storage device is provided, including: the battery device according to any one of the first aspect.

[0023] In a third aspect, an electrical device is provided, and the electrical device includes: the battery device according to any one of the first aspect.

[0024] In some embodiments, the electrical device is a vehicle, a ship or a spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a vehicle according to an embodiment of the present application is shown;

[0026] Figure 2 A schematic diagram of an energy storage device to which the present application may be applicable is shown;

[0027] Figure 3 A partial schematic structural diagram of the battery device according to the embodiment of the present application is shown;

[0028] Figure 4 A top view of the battery device provided by an embodiment of the present application is shown;

[0029] Figure 5 A connection diagram of the flexible circuit board of the battery device provided by an embodiment of the present application is shown;

[0030] Figure 6 A schematic diagram of the stress sensing member provided by an embodiment of the present application is shown;

[0031] Figure 7 A schematic diagram of the flexible circuit board in the battery device provided by an embodiment of the present application is shown;

[0032] Figure 8 Shows the connection schematic diagram of the flexible circuit board in the battery device provided by an embodiment of the present application;

[0033] Figure 9 Shows the schematic diagram of the structural member of the battery device provided by an embodiment of the present application;

[0034] Figure 10 Shows the connection diagram of the battery device and the control device provided by an embodiment of the present application;

[0035] Figure 11 Shows the schematic diagram of the control device provided by an embodiment of the present application;

[0036] Reference numerals:

[0037] 1 - Vehicle; 2 - Energy storage device; 10 - Battery device; 11 - Box; 20 - Battery cell; 30 - Controller; 40 - Motor; 50 - Battery compartment; 60 - Main control module; 70 - Thermal management module; 80 - Electrical module; 90 - Busbar module; 111 - First box part; 112 - Second box part; 120 - Structural member; 121 - Steel strip; 122 - Cross beam; 200 - Battery module; 210 - Flexible circuit board; 211 - Voltage detection component; 212 - Temperature detection component; 213 - Stress interface; 220 - First stress sensing component; 221 - Flexible layer; 222 - Resistance wire layer; 240 - Second stress sensing component; 1000 - Control device; 1010 - Processing module; 1020 - Alarm module;

[0038] In the drawings, the drawings are not drawn to actual scale. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the drawings.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0042] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase does not necessarily refer to the same embodiment when it appears in various places in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled", "attached" shall be construed in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0045] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only illustrative and should not constitute any limitation to this application.

[0046] The term "plurality" as used in this application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0047] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0048] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0049] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0050] The battery device mentioned in the embodiments of the present application may include one or more battery modules for providing voltage and capacity. The battery module may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0051] In some embodiments, the battery module is usually formed by arranging a plurality of battery cells.

[0052] As an example, the battery module can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0053] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery modules, and the battery module is accommodated in the box body.

[0054] As an example, the battery module can be a battery module, and the battery module can be accommodated in the box body by fixing the battery module in the box body.

[0055] As an example, the battery module can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0056] As an example, the box body can include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box body to accommodate the battery module. Here, "closed" means covering or closing, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0057] As an example, the box body can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery module.

[0058] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, a part of the box body can become at least a part of the floor of the vehicle, or a part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0059] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, power tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0060] The embodiments of the present application provide an energy storage device, including one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0061] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption periods and provide electrical energy to relevant users or electrical devices during high electricity consumption periods. The energy storage system provided by the embodiments of the present application can be any power system that requires an energy storage device.

[0062] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0063] In some embodiments, the energy storage device may include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0064] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a general control module, a power distribution module, and a fire protection module, etc.

[0065] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely applied to electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0066] In the current battery device, a flexible circuit board is provided to collect the parameters inside the battery device. However, the usage environment of the battery device is relatively complex, such as vibration, battery cell expansion, etc., which may cause the data collection of the flexible circuit board to fail and affect the stable operation of the battery device.

[0067] Therefore, how to improve the stability of the battery device has become an urgent problem to be solved.

[0068] An embodiment of the present application provides a battery device, including a flexible circuit board for collecting parameters of the battery device; and a first stress sensor disposed on the surface of the flexible circuit board. The first stress sensor is electrically connected to the flexible circuit board, and the resistance of the first stress sensor changes with the deformation of the first stress sensor.

[0069] In the technical solution provided by the embodiment of the present application, a first stress sensor is disposed on the surface of the flexible circuit board, and the resistance of the first stress sensor changes with the deformation of the first stress sensor. Thus, when the flexible circuit board deforms, the first stress sensor on the flexible circuit board can simultaneously feedback deformation data, so that in the case where the deformation of the flexible circuit board exceeds a certain threshold, it can be processed in time, reducing the possibility of flexible circuit board failure and improving the stability of the battery device.

[0070] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using the battery device.

[0071] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact drill, a concrete vibrator, a planer, etc. The embodiments of the present application do not impose special restrictions on the above electrical equipment.

[0072] For the convenience of description, the following embodiments take the electrical device as a vehicle as an example for illustration.

[0073] Figure 1 The structural schematic diagram of a vehicle according to an embodiment of the present application is shown.

[0074] For example, as Figure 1As shown, vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A motor 40, a controller 30, and a battery device 10 can be arranged inside vehicle 1. The controller 30 is used to control the power supply of the battery device 10 to the motor 40. For example, the battery device 10 can be arranged at the bottom, the front end, or the rear end of vehicle 1. The battery device 10 can be used for power supply of vehicle 1. For example, the battery device 10 can be used as the operating power source of vehicle 1 for the electrical circuit system of vehicle 1, such as for the working power requirements during starting, navigation, and operation of vehicle 1. In another embodiment of the present application, the battery device 10 can not only be used as the operating power source of vehicle 1, but also as the driving power source of vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1.

[0075] Figure 2 The schematic diagram of the energy storage device 2 to which the present application may be applicable is shown.

[0076] The energy storage device 2 provided by the embodiment of the present application may include a plurality of battery compartments 50, and the plurality of battery compartments 50 can accommodate a plurality of battery devices 10. Exemplarily, the battery compartments 50 can be provided with a plurality of battery device installation positions along the gravity direction to accommodate a plurality of battery devices 10. The battery device 10 can be put into or taken out from the battery device installation position of the battery compartment 50 through the entrance. After the battery device 10 is installed in the battery device installation position, the battery device 10 can be fixed by a locking mechanism. The battery device installation position can include two guide rails and two side walls arranged oppositely. The two guide rails are used to carry the battery device 10, and the two guide rails are respectively arranged on the two side walls at the same height. Adjacent battery compartments 50 can share the same side wall.

[0077] A plurality of battery compartments 50 are arranged in the energy storage device 2, and a shared side wall can be arranged between the plurality of battery compartments 50 to form a plurality of battery compartments 50, so that the battery device 10 can be arranged in the energy storage device 2. Except for the box body 11 structure of the energy storage device 2, there is no need to additionally arrange a cabinet.

[0078] Exemplarily, the shape of the energy storage device 2 can be a cuboid, but the embodiment of the present application is not limited thereto, and the energy storage device 2 can also be other shapes. In addition, for the convenience of transportation and reduction of transportation costs, the energy storage device 2 of the embodiment of the present application can be a standard-sized container. For example, 20-foot or 40-foot containers can be used, but the embodiment of the present application is not limited thereto.

[0079] The energy storage device 2 may further include a main control module 60. As an example, the main control module 60 can serve as the battery management unit of the battery cluster for monitoring and managing the battery cluster. The main control module 60 can be used to house the main control box, which is used to electrically connect the battery devices 10 in the battery compartment 50. The main control module 60 can monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, it can control the charge and discharge current, voltage, etc. of the battery cluster. The main control module 60 includes an auxiliary battery management unit, a fusion switch, and other modules.

[0080] The energy storage device 2 may further include a thermal management module 70. The thermal management module 70 can house the thermal management components to perform thermal management on the energy storage device 2. For example, heating or cooling the energy storage device 2. As an example, the thermal management module 70 can include a liquid cooling unit, and the liquid cooling unit provides coolant for regulating the temperature of the battery cells 20 to each battery device 10 through pipelines.

[0081] The energy storage device 2 may further include a fire protection module. As an example, the fire protection module includes a control panel, detectors, alarm devices, fire extinguishing devices, etc., for detecting, alarming, or extinguishing fires in the energy storage system. Exemplarily, the fire extinguishing device can be installed in the battery compartment 50, but the embodiments of the present application do not limit this.

[0082] The energy storage device 2 may further include an electrical module 80. The electrical module 80 can include electrical components. For example, it can include at least one of the following components: a distribution box, an inverter, a main control box, and a fan.

[0083] The energy storage device 2 may further include a busbar module 90. The busbar module 90 can include busbar components, and the busbar components are used for electrical connection with the main control module 60, etc. For example, the high-voltage wires from the main control module 60 can be connected to the busbar components through the wire grooves at the bottom of the box body 11. For example, the busbar components can achieve the parallel connection between multiple main control boxes.

[0084] The energy storage device 2 may further be provided with a top wall, and the top wall is arranged above in the direction of gravity to provide certain protection for the entire energy storage device 2.

[0085] The above is only exemplary. The energy storage device 2 may include more components than the above examples or may lack some components of the above examples. The embodiments of the present application do not limit this.

[0086] Figure 3 A partial structural schematic diagram of the battery device 10 according to the embodiment of the present application is shown. As Figure 3As shown, the battery device 10 of the embodiment of the present application may include a battery module 200, and the battery module 200 may include one or more battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 of the embodiment of the present application may be set according to actual applications. For example, the battery cell 20 may be a square shell battery as shown in Figure 3 , or may also be of other shapes different from those shown in Figure 3 . The embodiment of the present application is not limited thereto.

[0087] It should be understood that, as shown in Figure 3 , the battery device 10 of the embodiment of the present application may further include a box body 11, and the box body 11 may be used to accommodate the battery module 200, and the battery module 200 may include one or more battery cells 20. The interior of the box body 11 of the embodiment of the present application is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body 11. The box body 11 may include a plurality of parts. For example, the box body 11 shown in Figure 3 may include two parts, which are respectively referred to as a first box body part 111 and a second box body part 112 here. These two parts are only illustrative and should not constitute an undue limitation to the present application. In other embodiments, these two parts may also have other names. The first box body part 111 and the second box body part 112 are buckled together. The shapes of the first box body part 111 and the second box body part 112 may be determined according to the shape of the components accommodated inside, for example, may be determined according to the shape of the combination of a plurality of battery cells 20 accommodated inside. At least one of the first box body part 111 and the second box body part 112 has an opening. For example, as shown in Figure 2 , both the first box body part 111 and the second box body part 112 may be hollow cuboids with one face being an opening face, the openings of the first box body part 111 and the second box body part 112 are oppositely arranged, and the first box body part 111 and the second box body part 112 are buckled together to form a box body 11 with a closed chamber, and this chamber may be used to accommodate a plurality of battery cells 20. A plurality of battery cells 20 are placed in parallel or in series or in a mixed combination in the box body 11 formed after the first box body part 111 and the second box body part 112 are buckled together. In some embodiments, the box body 11 may also include three parts, for example, including a first box body part 111, a second box body part 112 and a frame respectively.

[0088] For another example, different from that shown in Figure 3 , only one of the first box body part 111 and the second box body part 112 may be a hollow cuboid with an opening, and the other may be plate-shaped to cover the opening. Taking the second box body part 112 as a hollow cuboid with an opening and the first box body part 111 as plate-shaped as an example, then the first box body part 111 covers the opening of the second box body part 112 to form a box body 11 with a closed chamber, and this chamber may be used to accommodate a plurality of battery cells 20.

[0089] The battery device 10 can also be integrated into the electrical device. For example, the housing 11 of the battery device 10 can be a part of the electrical device. Exemplarily, the electrical device can be a vehicle 1, and the chassis of the vehicle 1 can be a part of the housing 11 of the battery device 10. A receiving cavity 101 is provided on the chassis, and the inner wall of the receiving cavity 101 can serve as the other walls of the housing 11 to accommodate the battery cells 20.

[0090] Some components of the battery device 10 are schematically shown in the figure, but the battery device 10 can also include other components. For example, the battery device 10 can also include a partition, and a part of the space in the battery device 10 is separated by the partition.

[0091] The battery device 10 can also include other structural members 120, such as a steel strip 121, a cross beam 122, etc.

[0092] The battery device 10 can also be provided with a heat exchange component, and the heat exchange component can provide thermal management for the battery device 10. For example, the heat exchange component can be in the form of a cooling plate to provide thermal management for the battery cells 20. The heat exchange component provides thermal management for the battery cells 20 through a heat exchange medium.

[0093] Combined Figure 4 and Figure 5 explain the battery device 10 provided by some embodiments of the present application.

[0094] Figure 4 Shows a top view of the battery device 10 provided by an embodiment of the present application.

[0095] In some possible embodiments, the battery device 10 includes battery cells 20, a flexible circuit board 210. The flexible circuit board 210 is used to collect parameters of the battery cells 20, and the flexible circuit board 210 includes a stress sensing area; a first stress sensing member 220, the first stress sensing member 220 is disposed in the stress sensing area and the first stress sensing member 220 deforms as the flexible circuit board 210 in the stress sensing area part deforms; wherein, the first stress sensing member 220 is electrically connected to the flexible circuit board 210, and the resistance of the first stress sensing member 220 changes as the first stress sensing member 220 deforms.

[0096] The flexible circuit board 210 is a printed circuit made of a flexible insulating substrate, which helps to reduce the assembly process and enhance reliability. The flexible circuit board 210 can be bent and wound, and can reduce the volume of the circuit.

[0097] The insulating substrate can be polyimide, polyester, etc., and the embodiments of the present application do not limit this.

[0098] The parameters of the battery device 10 collected by the flexible circuit board 210 may be the voltage of the battery cells 20 in the battery device 10, the temperature of the battery cells 20, the temperature inside the battery device 10, etc., and the embodiments of the present application are not limited thereto.

[0099] Exemplarily, as Figure 5 shown, the flexible circuit board 210 may be connected with a voltage detection component 211, and the voltage detection component 211 may be connected to the electrode terminal of the battery cell 20 in the battery device 10 or the tab connecting the electrode terminal, so as to detect the voltage of the battery cell 20.

[0100] Exemplarily, the voltage detection component 211 may be a nickel sheet, etc., and the embodiments of the present application do not limit this.

[0101] Exemplarily, the flexible circuit board 210 may be connected with a temperature detection component 212. The temperature detection component 212 is arranged in the space of the battery device 10, and the temperature detection component 212 may also be arranged on the surface of the battery cell 20 or the structural member 120. The embodiments of the present application do not limit this.

[0102] Exemplarily, the temperature detection component 212 may be a thermistor. The resistance value of the thermistor changes with the change of the temperature where the thermistor is located, so as to determine the temperature where the temperature detection component 212 is located according to the corresponding relationship between its resistance value and the temperature.

[0103] The first stress sensing component 220 may be a device with a strain effect such as a strain gauge. The strain effect means that when a conductor or semiconductor material generates mechanical deformation under the action of an external force, its resistance value changes accordingly.

[0104] The first stress sensing component 220 may be a metal resistance wire device or a semiconductor device. In the embodiments of the present application, the first stress sensing component 220 is taken as an example of a metal resistance wire, but the embodiments of the present application are not limited thereto.

[0105] When the first stress sensing component 220 is a metal resistance wire device, the metal resistance wire may be directly adhered to the stress sensing area, or the metal resistance wire may be arranged on the surface of the flexible base layer, and the other side of the flexible base layer is bonded to the stress sensing area, so that when the stress sensing area deforms, the first stress sensing component 220 also deforms accordingly. The present application is not limited thereto.

[0106] The change of the resistance of the first stress sensing component 220 with the deformation of the first stress sensing component 220 may be that the resistance increases when the first stress sensing component 220 is stretched, or the resistance increases when the first stress sensing component 220 is compressed. As long as there is a relationship between the first stress sensing component 220 and its amount of deformation, it can be used as the implementation form of the first stress sensing component 220. The embodiments of the present application do not limit this.

[0107] Exemplarily, the first stress sensing element 220 may be a metal resistance strain gauge. In a specific direction and within a certain force range, the change in the resistance of the metal resistance strain gauge is proportional to the amount of deformation it generates. Therefore, when the change in the resistance of the metal resistance strain gauge connected to the circuit is obtained, the amount of deformation of the metal resistance strain gauge can be determined.

[0108] The first stress sensing element 220 is electrically connected to the flexible circuit board 210. The flexible circuit board 210 can not only collect parameters such as voltage and temperature, but also collect the parameters of the first stress sensing element 220, so as to determine the change in the resistance of the first stress sensing element 220, and then obtain the amount of deformation of the stress sensing area of the flexible circuit board 210, reducing the risk of information sampling failure caused by excessive deformation or even fracture of the flexible circuit board 210, and realizing risk warning, fault detection and location.

[0109] In the embodiments of the present application, the degree of deformation can be understood as the amount of deformation of the structure, the strain can be understood as the ratio of the amount of deformation generated after the structure is stressed to the original length, and the stress can be understood as the force applied to the structure.

[0110] In the technical solution provided by the embodiments of the present application, the first stress sensing element 220 is disposed on the surface of the flexible circuit board 210, and the resistance of the first stress sensing element 220 changes with the deformation of the first stress sensing element 220. Therefore, when the flexible circuit board 210 deforms, the first stress sensing element 220 on the flexible circuit board 210 can simultaneously feedback deformation data, so that when the deformation of the flexible circuit board 210 exceeds a certain threshold, it can be processed in time, reducing the possibility of failure of the flexible circuit board 210 and improving the stability of the battery device 10.

[0111] Figure 6 The figure shows a schematic diagram of a stress sensing element provided by an embodiment of the present application.

[0112] In some possible embodiments, the first stress sensing element 220 includes a flexible layer 221 and a resistance wire layer 222. The flexible layer 221 is attached to the surface of the stress sensing area, and the resistance wire layer 222 is disposed on the side of the flexible layer 221 away from the stress sensing area.

[0113] The flexible layer 221 may be a flexible substrate, such as a plastic film. The flexible layer 221 can effectively transfer the deformation of the structural member 120 to which it is attached, so that the resistance wire layer 222 disposed on the flexible layer 221 can deform with the deformation of the structural member 120.

[0114] The resistance wire layer 222 may be provided with one or more resistance wires in its force direction, or may be provided as a looped or reciprocally bent resistance wire. The purpose of providing multiple or looped bends is to accumulate the resistance changes generated by small deformations to form a larger resistance change amount, thereby improving the sensitivity of strain detection.

[0115] In the technical solution provided by the embodiment of the present application, the resistance wire layer 222 of the first stress sensing member 220 is disposed in the stress sensing area through the flexible layer 221. The flexible layer 221 can transmit deformation and separate the metal resistance wire from the traces of the flexible circuit board 210, thereby reducing the mutual influence between the traces on the flexible circuit board 210 and the resistance wire layer 222, improving the accuracy of stress sensing, and further improving the reliability of the battery device 10.

[0116] In some possible embodiments, the material of the flexible layer 221 is an insulating material.

[0117] Exemplarily, the insulating material may be silicone mica board, polyetherimide, polyimide, etc., and the embodiment of the present application does not limit this.

[0118] When the material of the flexible layer 221 is an insulating material, traces may also be arranged below the flexible layer 221, and these traces will not interfere with the resistance wire layer 222 either.

[0119] In the technical solution provided by the embodiment of the present application, the flexible layer 221 is an insulating material, and traces may also be provided below the flexible layer 221, thereby saving the layout space of the flexible circuit board 210 and improving the space utilization rate of the battery device 10.

[0120] In some possible embodiments, the dimension of the resistance wire layer 222 along the length direction of the flexible circuit board 210 is greater than the dimension of the resistance wire layer 222 along the width direction of the flexible circuit board 210.

[0121] The deformation amount of the resistance wire layer 222 in the length direction of the flexible circuit board 210 is generally larger. Setting the dimension of the resistance wire layer 222 in the length direction of the flexible circuit board 210 to be larger than that in the width direction of the flexible circuit board 210 can make the metal resistance wire more sensitive to the deformation in the length direction of the flexible circuit board 210.

[0122] In the technical solution provided by the embodiment of the present application, the dimension of the resistance wire layer 222 in the length direction of the flexible circuit board 210 is greater than the dimension of the resistance wire layer 222 along the width direction of the flexible circuit board 210. The first stress sensing member 220 is more sensitive to the deformation in the length direction of the flexible circuit board 210, can more easily capture the abnormality of the flexible circuit board 210, and improves the reliability of the battery device 10.

[0123] Figure 7 Fig. shows a schematic diagram of the flexible circuit board 210 in the battery device 10 provided by an embodiment of the present application.

[0124] In some possible embodiments, the flexible circuit board 210 includes a plurality of stress sensing regions, and a first stress sensing member 220 is disposed in each of the plurality of stress sensing regions.

[0125] Since bending may occur in different regions of the flexible circuit board 210, and the bending degrees of different regions may not be the same, when performing stress monitoring, disposing the first stress sensing members 220 in multiple regions can monitor the deformation degree of the entire flexible circuit board 210 as much as possible.

[0126] In the technical solution provided by the embodiment of the present application, disposing the first stress sensing members 220 in multiple regions of the flexible circuit board 210 can improve the accuracy of monitoring the deformation degree of the entire flexible circuit board 210, reduce the risk of excessive deformation of the flexible circuit board 210, and improve the reliability of the battery device 10.

[0127] The following Figure 8 and Figure 9 are used to illustrate the battery device 10 provided by some embodiments of the present application.

[0128] Figure 8 FIG. shows a schematic connection diagram of the flexible circuit board 210 in the battery device 10 provided by an embodiment of the present application; Figure 9 FIG. shows a schematic diagram of the structural member 120 of the battery device 10 provided by an embodiment of the present application.

[0129] In some possible embodiments, the battery device 10 further includes: a structural member 120 disposed inside the battery device 10; a second stress sensing member 240 disposed on the surface of the structural member 120; wherein, the second stress sensing member 240 is electrically connected to the flexible circuit board 210, and the resistance of the second stress sensing member 240 changes with the deformation of the second stress sensing member 240.

[0130] The structural member 120 may be structures such as the housing 11, partition, end plate, steel strip 121, cross beam 122, etc. of the battery device 10, and the embodiments of the present application do not limit this.

[0131] For the description of the second stress sensing member 240, reference may be made to the first stress sensing member 220, and details will not be elaborated here.

[0132] The second stress sensing member 240 is disposed on the surface of the structural member 120 and can deform with the deformation of the structural member 120, so that the change in the resistance of the second stress sensing member 240 can reflect the deformation amount of the structural member 120, and further enable the deformation degree of the structural member 120 in the battery device 10 to be monitored.

[0133] The flexible circuit board 210 can be configured to electrically connect to the stress interface 213 of the second stress sensor 240, and obtain the resistance change amount of the second stress sensor 240 through the stress interface 213.

[0134] In the technical solution provided by the embodiment of the present application, the second stress sensor 240 is disposed on the surface of the structural member 120 of the battery device 10, and can reflect the deformation degree of the structural member 120. During the entire life cycle of the battery device 10, the deformation parameters of the structural member 120 in the battery device 10 can be monitored, so as to determine whether the structural member 120 is fatigued, and further, the risk of fatigue of the structural member 120 can be evaluated in real time, and an early warning can be given in time before the product fails, improving the reliability of the battery device 10.

[0135] In some embodiments, the structural member 120 includes a steel strip 121, and the battery device 10 further includes: a battery module 200, the battery module 200 includes a plurality of battery cells 20, and the steel strip 121 is disposed around the battery module 200; wherein, the second stress sensor 240 is disposed on the surface of the steel strip 121, and the dimension of the second stress sensor 240 along the length of the steel strip 121 is greater than the dimension of the second stress sensor 240 along the width of the steel strip 121.

[0136] Since the failure of the steel strip 121 is usually caused by excessive stretching in the length direction, the deformation monitoring in the length direction of the steel strip 121 is more important. Setting the dimension of the second stress sensor 240 in the length direction of the steel strip 121 to be larger than the dimension in the width direction of the steel strip 121 can make the second stress sensor 240 more sensitive to the deformation in the length direction of the steel strip 121.

[0137] In the technical solution provided by the embodiment of the present application, the dimension of the second stress sensor 240 in the length direction of the steel strip 121 is greater than the dimension of the second stress sensor 240 along the width direction of the steel strip 121. The second stress sensor 240 is more sensitive to the deformation detection in the length direction of the steel strip 121, and can more easily capture the abnormality of the steel strip 121, improving the reliability of the battery device 10.

[0138] The shapes of the first stress sensor 220 and the second stress sensor 240 are not limited, and any possible shape can be used as the implementation manner of the first stress sensor 220 and the second stress sensor 240.

[0139] Exemplarily, in some possible embodiments, the second stress sensor 240 is rectangular, rhombic or hexagonal.

[0140] In some embodiments, the battery device 10 includes a box body 11, and the structural member 120 includes: a cross beam 122, the cross beam 122 connects opposite walls of the box body 11, and a second stress sensing member 240 is disposed on the surface of the cross beam 122; wherein, the second stress sensing member 240 includes a group of first resistance wires parallel to a first direction and a group of second resistance wires parallel to a second direction, the first resistance wires are insulated from the second resistance wires, and the first direction and the second direction are parallel to the surface of the cross beam 122.

[0141] Since the area of the cross beam 122 is large and the forces on the cross beam 122 are relatively complex, there may be deformations in multiple directions, such as the expansion of the battery cell 20, mechanical disturbances of the box body 11, etc. Monitoring the stress in multiple directions may capture the actual situation of the cross beam 122 more sensitively.

[0142] The insulation between the first resistance wires and the second resistance wires may be achieved by providing a flexible layer 221 between the first resistance wires and the second resistance wires, or by using a wiring method in which the first resistance wires and the second resistance wires are in the same layer but do not intersect in space. The present application is not limited thereto.

[0143] In the technical solution provided by the embodiments of the present application, when different-direction resistance wires are disposed on the surface of the cross beam 122 of the battery device 10, the force condition of the cross beam 122 can be monitored more accurately, which is beneficial to accurately judging the stress information received by the cross beam 122 and improving the stability of the battery device 10.

[0144] In some possible embodiments, the first direction and the second direction are perpendicular to each other.

[0145] Since the forces received in multiple directions can be decomposed along the orthogonal directions, the perpendicularity of the first direction and the second direction can most efficiently capture the stress information received by the cross beam 122.

[0146] The following Figure 10 and Figure 11 illustrate the scenarios to which the battery device 10 provided by some embodiments of the present application may be applicable.

[0147] In some embodiments, the flexible circuit board 210 further includes: a temperature interface for obtaining the temperature data of the battery device 10; a voltage interface for obtaining the voltage data of at least one battery cell 20.

[0148] The flexible circuit board 210 may further include other types of interfaces, and other types of data, such as humidity, oxygen content, etc., are collected through the other types of interfaces. The embodiments of the present application do not limit this.

[0149] The flexible circuit board 210 may be electrically connected to a control device 1000 in a device or system using the battery device 10 to transmit the parameters of the battery device 10.

[0150] In some possible embodiments, an energy storage device 2 is provided, and the energy storage device 2 includes the battery device 10 in the foregoing embodiments.

[0151] In some possible embodiments, the energy storage device 2 further includes a control device 1000, and the control device 1000 is electrically connected to the flexible circuit board 210 in the battery device 10, so that the control device 1000 obtains the parameters of the battery device 10 collected by the flexible circuit board 210 through the flexible circuit board 210.

[0152] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery device 10 in any of the above solutions, and the battery device 10 is used to provide electrical energy for the electrical device. The electrical device may include a control device 1000, and the control device 1000 is electrically connected to the flexible circuit board 210 in the battery device 10, so that the control device 1000 obtains the parameters of the battery device 10 collected by the flexible circuit board 210 through the flexible circuit board 210.

[0153] The electrical device may be any of the foregoing devices or systems that apply the battery device 10.

[0154] Exemplarily, the control device 1000 may be Figure 1 the controller 30 in, for example, a battery management system (BMS) or other devices with control functions.

[0155] In some possible embodiments, the control device 1000 may include a processing module 1010, and the processing module 1010 may obtain the data collected by the flexible circuit board 210 and analyze the collected data according to different requirements. Analyzing the data may include time-domain analysis, frequency-domain analysis, peak detection, trend analysis, etc., to identify the characteristics and patterns of the stress signal.

[0156] The processing module 1010 may include one or more processors. The processors mentioned in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0157] The control device 1000 may further include an alarm module 1020. The control device 1000 can set a threshold according to requirements and determine whether to control the alarm unit to alarm based on the acquired parameters. For example, when the stress signal exceeds or is lower than a predetermined threshold, the control device 1000 can control the alarm unit to alarm. The control device 1000 can perform fault diagnosis and predictive maintenance based on historical data and real-time monitoring results, helping to predict the health status of the structure or equipment and reducing the possibility of potential faults occurring. Through the above design, when the expansion force of the battery device 10 or the battery module 200 increases, the second stress sensing member 240 will transmit the collected stress information to the control device 1000, timely predict the stress boundary and report relevant signals, monitor the stress information throughout the life cycle, and improve the reliability of the battery device 10.

[0158] According to some embodiments of the present application, the present application provides a battery device 10, including a flexible circuit board 210 for collecting parameters of the battery device 10. The flexible circuit board 210 includes a plurality of stress sensing areas; a plurality of first stress sensing members 220 are respectively disposed in the plurality of stress sensing areas, and the first stress sensing members 220 deform as the flexible circuit board 210 in the stress sensing area part deforms; wherein, the first stress sensing members 220 are electrically connected to the flexible circuit board 210, and the resistance of the first stress sensing members 220 changes as the first stress sensing members 220 deform, so as to monitor the deformation degree of the flexible circuit board 210, predict risks in advance, and improve the reliability of the battery device 10.

[0159] According to some embodiments of the present application, the present application provides a battery device 10, including a flexible circuit board 210 for collecting parameters of the battery device 10; a first stress sensing member 220 disposed on the surface of the flexible circuit board 210; wherein, the first stress sensing member 220 is electrically connected to the flexible circuit board 210, and the resistance of the first stress sensing member 220 changes as the first stress sensing member 220 deforms; the flexible circuit board 210 further includes a stress structure, and a second stress sensing member 240 is electrically connected to the flexible circuit board 210 through a stress interface 213. The second stress sensing member 240 is disposed on the surface of the structural member 120, and the structural member 120 may be a steel strip 121, a cross beam 122, etc., so as to monitor the deformation degree of the structural member 120 in the battery device 10. When the expansion force of the battery device 10 or the battery module 200 increases, the second stress sensing member 240 will transmit the collected stress information to the control device 1000, timely predict the stress boundary and report relevant signals, monitor the stress information throughout the life cycle, and improve the reliability of the battery device 10.

[0160] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells (20); A flexible circuit board (210), the flexible circuit board (210) being used to collect parameters of the battery cell (20), the flexible circuit board (210) comprising a stress sensing area; A first stress sensing component (220), the first stress sensing component (220) being arranged in the stress sensing area and deforming as the flexible circuit board (210) in the stress sensing area deforms; Wherein, the first stress sensing component (220) is electrically connected to the flexible circuit board (210), and the resistance of the first stress sensing component (220) changes with the deformation of the first stress sensing component (220).

2. The battery device according to claim 1, characterized in that: The first stress sensing component (220) comprises a flexible layer (221) and a resistance wire layer (222), wherein the flexible layer (221) is attached to the surface of the stress sensing area, and the resistance wire layer (222) is arranged on a side of the flexible layer (221) away from the stress sensing area.

3. The battery device according to claim 2, characterized in that: The material of the flexible layer (221) is an insulating material.

4. The battery device according to claim 2, characterized in that: The dimension of the resistance wire layer (222) along the length direction of the flexible circuit board (210) is greater than the dimension of the resistance wire layer (222) along the width direction of the flexible circuit board (210).

5. The battery device according to claim 1, characterized in that: The flexible circuit board (210) comprises a plurality of stress sensing areas, and the plurality of stress sensing areas are respectively provided with the first stress sensing components (220).

6. The battery device according to claim 1, characterized in that: The battery device further comprises: A structural member (120), wherein the structural member (120) is arranged in the battery device; a second stress sensing component (240), wherein the second stress sensing component (240) is arranged on the surface of the structural component (120); The second stress sensing component (240) is electrically connected to the flexible circuit board (210), and the resistance of the second stress sensing component (240) changes with the deformation of the second stress sensing component (240).

7. The battery device according to claim 6, characterized in that: The structural member (120) comprises a steel strip (121), and the battery device further comprises: A battery module (200), the battery module (200) comprising a plurality of battery cells (20), the steel strip (121) being arranged around the battery module (200); The second stress sensing component (240) is arranged on the surface of the steel strip (121), and the dimension of the second stress sensing component (240) along the length of the steel strip (121) is greater than the dimension of the second stress sensing component (240) along the width of the steel strip (121).

8. The battery device according to claim 6, characterized in that: The shapes of the second stress sensing element (240) include rectangle, rhombus and hexagon.

9. The battery device according to claim 6, characterized in that: The battery device comprises a box body (11), and the structural member (120) comprises: A crossbeam (122), the crossbeam (122) connecting opposite walls of the box (11), the second stress sensing element (240) being arranged on a surface of the crossbeam (122); The second stress sensing component (240) comprises a group of first resistance wires parallel to a first direction and a group of second resistance wires parallel to a second direction, the first resistance wires are insulated from the second resistance wires, the first direction and the second direction are parallel to the surface of the beam (122), and the first direction and the second direction are perpendicular.

10. The battery device according to any one of claims 1 to 9, characterized in that: The flexible circuit board (210) further includes: A temperature interface, used to obtain temperature data of the battery device; A voltage interface is used to obtain voltage data of the battery cell (20).

11. An energy storage device, characterized in that: include: A battery device as claimed in any one of claims 1 to 10.

12. An electrical device, characterized in that: The electrical device comprises: A battery device as claimed in any one of claims 1 to 10.

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