Battery device and electric device

Abstract

The application relates to the battery technical field and provides a battery device and a power utilization device. The battery device comprises soft package battery monomers, a box body, a plurality of cladding shells and a liquid leakage detection device. The liquid leakage detection device comprises a detection module and a first conductor and a second conductor which are electrically connected with the detection module. The first conductor and the second conductor are arranged at intervals. The first conductor and the second conductor are distributed below the electrode lead-out portions of the soft package battery monomers. The first conductor and the second conductor are insulated and separated from the cladding shells. When the soft package battery monomers leak electrolyte at the electrode lead-out portion of the soft package shell, the leaked electrolyte falls to the first conductor and the second conductor below according to gravity so that the first conductor and the second conductor are conducted by the electrolyte. Then, the detection module can detect the conduction signals of the first conductor and the second conductor to determine the liquid leakage condition.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Taking pouch batteries as an example, pouch batteries consist of an aluminum-plastic film encapsulation structure. Due to the encapsulation process of the aluminum-plastic film, the structure at the electrode leads is relatively weak, making it prone to electrolyte leakage during battery cycle expansion. To reduce the probability of subsequent problems caused by electrolyte leakage, it is urgent to develop a battery device capable of detecting electrolyte leakage. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device to detect electrolyte leakage in a single soft-pack battery cell.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery device, including a pouch battery cell, a housing, multiple casings, and a leakage detection device. The pouch battery cell includes a pouch shell and an electrode assembly encapsulated inside the pouch shell. The electrode assembly has an electrode lead-out portion at its end, and at least a portion of the electrode lead-out portion is exposed outside the pouch shell. The housing contains the pouch battery cell, and the casings are housed within the housing, with the pouch battery cell contained within the casings. In the direction of gravity, the bottom end of the casing has an opening, and the bottom end of the casing is connected to the housing. The leakage detection device includes a detection module and a first conductor and a second conductor electrically connected to the detection module, respectively. The first conductor and the second conductor are spaced apart. The first conductor and the second conductor are distributed below the electrode lead-out portions of each pouch battery cell, and the first conductor and the second conductor are insulated from and separated from the casings.

[0007] The beneficial effects of the embodiments of this application are as follows: The battery device provided in this application sets the first conductor and the second conductor of the leakage detection device below the electrode lead-out portion of each soft-pack battery cell. Since the structural strength of the electrode lead-out portion encapsulated in the soft-pack casing is relatively weak, when the soft-pack battery cell leaks electrolyte at the electrode lead-out portion encapsulated in the soft-pack casing, the leaked electrolyte falls to the first conductor and the second conductor below due to gravity, thereby making the first conductor and the second conductor conductive by the electrolyte. Then, the detection module can detect the conduction signal of the first conductor and the second conductor and determine that leakage has occurred, so as to achieve the purpose of timely detection of leakage.

[0008] In some embodiments, the first conductor and the second conductor are disposed on the inner bottom wall of the housing.

[0009] By adopting the above technical solution, when electrolyte leaks from the electrode lead-out portion of the soft-pack battery cell, the leaked electrolyte drips down onto the inner bottom wall of the box, thereby spreading the electrolyte on the inner bottom wall of the box and connecting the first conductor and the second conductor, so that the detection module can detect the conduction signal of the first conductor and the second conductor and determine that leakage has occurred.

[0010] In some embodiments, an adhesive layer is provided on the inner bottom wall of the housing, and the cover is bonded to the inner bottom wall of the housing through the adhesive layer; an adhesive baffle is also provided on the inner bottom wall of the housing, the adhesive baffle surrounds the first conductor and the second conductor and is used to separate the adhesive layer.

[0011] By adopting the above technical solution, an adhesive layer is provided on the inner bottom wall of the box to fix the casing and the soft-pack battery cell. By providing an adhesive baffle on the inner bottom wall of the box and surrounding the first conductor and the second conductor, the adhesive layer is separated from the first conductor and the second conductor, thereby effectively reducing the impact of the adhesive layer on the first conductor and the second conductor, and improving the accuracy of electrolyte leakage detection.

[0012] In some embodiments, a groove is provided on the inner bottom wall of the housing, and at least a portion of the first conductor and at least a portion of the second conductor are disposed in the groove.

[0013] By adopting the above technical solution, by setting a groove on the inner bottom wall of the box and placing at least part of the first conductor and at least part of the second conductor in the groove, when electrolyte leakage occurs, the leaked electrolyte will flow into the groove, making it easier for the first conductor and the second conductor in the groove to conduct electricity, thus further improving the accuracy of electrolyte leakage detection.

[0014] In some embodiments, a thermal management component is provided on the inner bottom of the housing, and the inner bottom wall of the housing is the surface of the thermal management component; in the direction of gravity, the bottom end of the covering shell is connected to the thermal management component, and the first conductor and the second conductor are disposed on the thermal management component.

[0015] By adopting the above technical solution, when a thermal management component is installed inside the box, the first conductor and the second conductor are installed on the thermal management component to facilitate the detection of leaked electrolyte.

[0016] In some embodiments, the first conductor and the second conductor are disposed on the end side of the soft housing where the electrode leads are exposed, and the first conductor and the second conductor are spaced apart along the direction of gravity.

[0017] By adopting the above technical solution, when electrolyte leakage occurs, the leaked electrolyte flows downwards due to gravity and flows through the first conductor and the second conductor, thereby enabling the detection module to detect the leakage in a timely manner.

[0018] In some embodiments, the shell is provided with a through-hole structure, through which the first conductor and the second conductor pass.

[0019] By adopting the above technical solution, the first conductor and the second conductor can be routed through the through-hole structure, thereby improving the convenience of routing the first conductor and the second conductor.

[0020] In some embodiments, the through-hole structure includes a clearance groove disposed at the end of the cover shell, through which the first conductor and the second conductor pass.

[0021] By adopting the above technical solution, by opening a clearance groove at the end of the casing, the first conductor and the second conductor can be laid through the clearance groove, thereby improving the convenience of laying the first conductor and the second conductor.

[0022] In some embodiments, the through-hole structure includes a through-hole disposed on the cover shell and extending through it, through which the first conductor and the second conductor pass.

[0023] By adopting the above technical solution, the first conductor and the second conductor can be arranged through the shell by opening a through hole, which can effectively reduce the probability of short circuit between the first conductor and the second conductor and the components outside the shell.

[0024] In some embodiments, the projections of the first conductor and the second conductor are separated from the covering shell in the direction of gravity.

[0025] By adopting the above technical solution, the first conductor and the second conductor are separated from the casing, so as to reduce the probability that the first conductor and the second conductor will be short-circuited with the casing respectively, which would affect the accuracy of electrolyte leakage detection.

[0026] In some embodiments, in a first direction, a plurality of covering shells are arranged sequentially, and in a second direction, electrode leads are formed at opposite ends of the electrode assembly and exposed outside the soft shell; wherein, the first direction, the second direction and the gravity direction are perpendicular to each other; in the second direction, a first conductor and a second conductor are provided on opposite sides of the soft shell, and the first conductor and the second conductor extend along the first direction.

[0027] By adopting the above technical solution, the first conductor and the second conductor can be extended and arranged along the first direction to pass under the electrode lead of each soft-pack battery cell in the multiple encapsulation shells. In this way, leakage detection can be performed on all soft-pack battery cells. At the same time, the arrangement and routing of the first conductor and the second conductor is relatively simple, and they only need to be arranged in a straight line along the first direction.

[0028] In some embodiments, an insulating layer is provided on the end face of the casing facing the first conductor and the second conductor.

[0029] By adopting the above technical solution, the insulating layer is used to provide insulation protection for the casing, thereby achieving insulation separation between the casing and the first and second conductors. This effectively reduces the probability of short circuits occurring between the casing and the first and second conductors, which could affect the accuracy of the detection.

[0030] In some embodiments, the surfaces of the first conductor and the second conductor are covered with a separating layer configured to decompose as the electrolyte flows through them.

[0031] By adopting the above technical solution, the separator layer can separate and protect the first conductor and the second conductor, thereby reducing the probability of short circuit between the first conductor and the second conductor and the casing, which would affect the detection results. At the same time, when leakage occurs, the leaked electrolyte can corrode and decompose the separator layer, so that the electrolyte can contact and conduct the first conductor and the second conductor, so that the detection module can detect the leakage.

[0032] In some embodiments, the enclosure includes two first housing portions spaced apart and a second housing portion disposed at the same end of the two first housing portions along the direction of gravity; an opening is formed between the ends of the two first housing portions facing away from the second housing portion in the direction of gravity; the two first housing portions are connected to the inner bottom wall of the housing, and the two first housing portions are insulated from and separated from the first conductor and the second conductor.

[0033] By adopting the above technical solution, the first housing part and the second housing part can be combined together to form a covering shell for accommodating the soft-pack battery cell, and the two first housing parts are insulated and separated from the first conductor and the second conductor to reduce the influence of the first housing part on the leakage detection results.

[0034] In some embodiments, the battery device further includes a power distribution device housed within a housing, which is electrically connected to the pouch cell and the detection module.

[0035] By adopting the above technical solution, the power distribution device can be used to supply power to the detection module so that the detection module can operate normally.

[0036] In some embodiments, the leakage detection device further includes an alarm module electrically connected to the detection module; the detection module is configured to send an electrical signal to the alarm module when the first conductor and the second conductor are in phase, so that the alarm module issues an alarm.

[0037] By adopting the above technical solution, when the detection module detects leaking electrolyte, the detection module can control the alarm module to issue an alarm so as to provide a prompt.

[0038] Secondly, embodiments of this application also provide an electrical device, which includes a battery device as described above, and the battery device is used to provide electrical energy.

[0039] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the battery device described above. Therefore, when the battery device used in the electrical device leaks electrolyte, it can be detected by a leakage detection device, so as to deal with the leakage in a timely manner and reduce the risk of using the electrical device. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;

[0043] Figure 3 A schematic diagram of a single soft-pack battery cell provided in an embodiment of this application;

[0044] Figure 4 An exploded view of a battery device provided in an embodiment of this application;

[0045] Figure 5 This is a schematic diagram of the arrangement structure of the covering shell provided in the embodiments of this application;

[0046] Figure 6 for Figure 5 A magnified view of part A;

[0047] Figure 7 A schematic diagram of the wiring arrangement structure of a first conductor and a second conductor provided in an embodiment of this application;

[0048] Figure 8 This is a schematic diagram of the structure of the adhesive-blocking component provided in the embodiments of this application;

[0049] Figure 9 A schematic diagram of another wiring arrangement structure for the first and second conductors provided in an embodiment of this application;

[0050] Figure 10 A schematic diagram of another wiring arrangement structure for the first and second conductors provided in an embodiment of this application;

[0051] Figure 11 A schematic diagram of another wiring arrangement structure for the first and second conductors provided in an embodiment of this application;

[0052] Figure 12 A schematic diagram of another wiring arrangement structure for the first and second conductors provided in an embodiment of this application;

[0053] Figure 13 This is a schematic diagram of a shell structure provided in an embodiment of this application.

[0054] The following are the labeling elements in the figure:

[0055] 1000, vehicles;

[0056] 100. Battery assembly; 200. Controller; 300. Motor;

[0057] 10. Box body; 11. First box body; 12. Second box body; 10a. Groove;

[0058] 20. Soft-pack battery cell; 20a. Electrode lead-out section; 21. Soft-pack outer casing;

[0059] 30. Encasing shell; 301. Opening; 302. Through-hole structure; 302a. Clearance groove; 302b. Through-hole; 31. First shell section; 32. Second shell section;

[0060] 40. Leakage detection device; 41. First conductor; 42. Second conductor;

[0061] 50. Adhesive coating layer; 60. Adhesive barrier; 70. Thermal management components; 80. Insulation layer; 90. Separator layer;

[0062] X, first direction; Y, second direction; Z, direction of gravity. Detailed Implementation

[0063] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0064] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] Currently, judging from market trends, the application of power battery devices is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in industrial equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0068] Taking pouch batteries as an example, pouch batteries consist of an aluminum-plastic film encapsulation structure. Due to the encapsulation process of the aluminum-plastic film, the structure at the electrode leads is relatively weak, making it prone to electrolyte leakage during battery cycle expansion. To reduce the probability of subsequent problems caused by electrolyte leakage, it is urgent to develop a battery device capable of detecting electrolyte leakage.

[0069] Based on the above considerations, a battery device is designed to detect electrolyte leakage in individual pouch battery cells. The device includes a leakage detection unit, with a first conductor and a second conductor spaced below the electrode leads of each individual pouch battery cell. When any individual pouch battery cell leaks electrolyte, the electrolyte may leak from the electrode leads encapsulated in the pouch casing. The leaked electrolyte will flow downwards or drip due to gravity, thus making the first and second conductors conductive. The detection module of the leakage detection unit can detect the conductivity signal between the first and second conductors and determine that a leakage has occurred. This achieves real-time and accurate leakage detection.

[0070] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0071] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0072] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0073] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0074] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a battery device 100 provided for some embodiments of this application. For example... Figure 2 As shown, the battery device 100 includes a housing 10 and a pouch battery cell 20. The housing 10 can be divided into a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fitted together to form a space for accommodating the pouch battery cell 20.

[0075] In the battery device 100, there can be multiple pouch battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple pouch battery cells 20 can be connected in both series and parallel. Multiple pouch battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple pouch battery cells 20 is placed in the receiving space defined by the first housing 11 and the second housing 12. Alternatively, the battery device 100 can also consist of multiple pouch battery cells 20 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the receiving space defined by the first housing 11 and the second housing 12. The battery device 100 may also include other structures.

[0076] In this embodiment, the pouch battery cell 20 can be a secondary battery cell, such as a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and this embodiment is not limited thereto. The pouch battery cell 20 can be cylindrical, flat, cuboid, or other shapes, and this embodiment is not limited thereto.

[0077] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a pouch cell 20 provided for some embodiments of this application. The pouch cell 20 refers to a battery cell that uses a flexible packaging film (such as aluminum-plastic film) as its outer casing. Compared to battery cells with metal casings, the pouch cell 20 has the advantages of lighter weight and more flexible external shape.

[0078] The soft packaging film of the pouch cell 20 forms a receiving cavity by encapsulation. The receiving cavity is used to accommodate the electrode assembly (not shown in the figure) and the electrolyte. One or both sides of the electrode assembly are provided with electrode leads 20a with opposite polarities. The electrode leads 20a are used to lead out the current generated by the electrode assembly. A part of the electrode leads 20a extends out of the soft packaging film through the sealing edge formed by the soft packaging film and is electrically connected to other devices (e.g., the electrode leads 20a of other pouch cell 20).

[0079] According to some embodiments of this application, please refer to Figures 4 to 6 This application provides a battery device 100, including a pouch battery cell 20, a housing 10, multiple casings 30, and a leakage detection device 40. The pouch battery cell 20 includes a pouch casing 21 and an electrode assembly (not shown) encapsulated inside the pouch casing 21. The electrode assembly has an electrode lead-out portion 20a at its end, and at least a portion of the electrode lead-out portion 20a is exposed outside the pouch casing 21. The housing 10 houses the pouch battery cell 20, and the casings 30 are housed within the housing 10, with pouch cells inside the casings 30. Battery cell 20; In the direction of gravity Z, the bottom end of the casing 30 is provided with an opening 301, and the bottom end of the casing 30 is connected to the housing 10; The leakage detection device 40 includes a detection module (not shown in the figure) and a first conductor 41 and a second conductor 42 that are electrically connected to the detection module respectively. The first conductor 41 and the second conductor 42 are arranged at intervals; The first conductor 41 and the second conductor 42 are distributed below the electrode lead-out portion 20a of each soft-pack battery cell 20, and the first conductor 41 and the second conductor 42 are insulated and separated from the casing 30.

[0080] The casing 30 refers to the structural component used to enclose and protect the pouch cell 20. The casing 30 has an internal accommodating space, allowing the pouch cell 20 to be housed inside the casing 30.

[0081] The number of the casing 30 is multiple. For example, the number of the casing 30 can be any number of two, three or more; each casing 30 contains one or more pouch cell 20.

[0082] Optionally, the casing 30 can be made of copper, aluminum, or other metals or alloys. This results in a casing 30 with superior structural strength, which can protect the internal pouch battery cells 20. At the same time, the casing 30 also has good thermal conductivity, which can conduct the heat generated by the internal pouch battery cells 20 to the outside for heat dissipation.

[0083] An opening 301 is provided at the bottom of the casing 30 in the direction of gravity Z; thus, the first conductor 41 and the second conductor 42 can be inserted into the casing 30 or laid out on the outside of the casing 30; when the first conductor 41 and the second conductor 42 are arranged outside the casing 30, the electrolyte leaked from the soft-pack battery cell 20 inside the casing 30 can pass through the opening 301 and fall onto the first conductor 41 and the second conductor 42 for detection.

[0084] The bottom end of the shell 30 is connected to the housing 10; optionally, the bottom end of the shell 30 can be directly connected to the housing 10; or, the bottom end of the shell 30 can be indirectly connected to the housing 10 through other components (such as heat sink, protective plate, etc.). By connecting the bottom end of the shell 30 to other components fixed to the housing 10, the shell 30 and the housing 10 are relatively fixed.

[0085] Alternatively, the cover shell 30 can be connected to the housing 10 by means of adhesive bonding, welding, fastener connection, etc.

[0086] The pouch cell 20 includes a pouch casing 21 and an electrode assembly; the pouch casing 21 refers to a flexible shell used to encapsulate the electrode assembly and electrolyte inside, such as an aluminum-plastic film shell. When the pouch cell 20 is housed within the casing 30, the pouch casing 21 can be connected to the inner bottom wall of the housing 10 through the opening 301, thereby improving the assembly stability of the pouch cell 20.

[0087] The leakage detection device 40 refers to a device used to detect leakage inside the battery device 100.

[0088] The leakage detection device 40 includes a detection module, a first conductor 41, and a second conductor 42. The detection module refers to an electronic component or sensor module used to sense and determine leakage conditions. For example, the detection module includes, but is not limited to, resistance sensors, capacitance sensors, voltage sensors, and current sensors. In some embodiments, the detection module may be integrated into the battery management system (BMS) of the battery device.

[0089] The first conductor 41 and the second conductor 42 refer to conductor structures with better conductivity. For example, the first conductor 41 and the second conductor 42 may be, but are not limited to, conductive structures such as metal wires and metal conductive sheets.

[0090] The first conductor 41 and the second conductor 42 are spaced apart and electrically connected to the detection module respectively. In this way, when the electrolyte flows onto the first conductor 41 and the second conductor 42, the first conductor 41 and the second conductor 42 can be made to conduct, so that the detection module can detect the conduction signal of the first conductor 41 and the second conductor 42.

[0091] For example, in some embodiments, the detection module may include a resistance detection sensor. When electrolyte leakage occurs, after the leaked electrolyte spreads to the first conductor 41 and the second conductor 42, the resistance detection sensor can detect a change in the resistance between the first conductor 41 and the second conductor 42, that is, a decrease in the resistance between the first conductor 41 and the second conductor 42. In this way, the detection module can determine that a leakage phenomenon has occurred.

[0092] The first conductor 41 and the second conductor 42 are distributed below the electrode lead-out portion 20a of each pouch cell 20; optionally, the first conductor 41 and the second conductor 42 may be distributed directly below the exposed electrode lead-out portion 20a of the pouch casing 21 of each pouch cell 20; or, the first conductor 41 and the second conductor 42 may be distributed to the side below the exposed electrode lead-out portion 20a of the pouch casing 21 of each pouch cell 20, for example, directly below the exposed electrode lead-out portion 20a.

[0093] In some embodiments, when multiple casings 30 are arranged sequentially and aligned, the first conductor 41 and the second conductor 42 can be linearly distributed along the arrangement direction of the casings 30; when multiple casings 30 are randomly arranged or misaligned, the first conductor 41 and the second conductor 42 can be bent and arranged so that the first conductor 41 and the second conductor 42 are present below the exposed electrode lead 20a of the soft-pack outer shell 21 of the soft-pack battery cell 20 in each casing 30.

[0094] It should be understood that electrode leads 20a with different polarities are respectively provided at opposite ends of the electrode assembly, thereby exposing electrode leads 20a at opposite ends of the soft-pack casing 21. In some embodiments, the leakage detection device 40 may include a set of first conductors 41 and second conductors 42, which may be arranged around the casing 30 and simultaneously located at opposite ends of the casing 30, for detecting leakage at the exposed electrode leads 20a at opposite ends of the soft-pack battery cell 20 inside the casing 30. Alternatively, in other embodiments, the leakage detection device 40 may include two sets of first conductors 41 and second conductors 42, which are respectively arranged at opposite ends of the casing 30, so that the two sets of first conductors 41 and second conductors 42 respectively detect leakage at the exposed electrode leads 20a of the soft-pack battery cell 20 at their respective ends.

[0095] The first conductor 41 and the second conductor 42 are insulated from the casing 30. Optionally, the first conductor 41 and the second conductor 42 can be spaced apart from the casing 30 to form an insulating barrier, or an insulating layer can be provided on the casing 30, or an insulating layer that is easily corroded by the electrolyte can be provided on the first conductor 41 and the second conductor 42; alternatively, a slotted structure can be formed on the casing 30 to create a gap between the first conductor 41 and the second conductor 42 and the casing 30. This configuration can effectively reduce the influence of the casing 30 on the detection results and avoid false detections caused by the casing 30 conducting the first conductor 41 and the second conductor 42.

[0096] The battery device 100 provided in this application embodiment sets the first conductor 41 and the second conductor 42 of the leakage detection device 40 below the electrode lead-out portion 20a of the soft-pack battery cell 20. Since the structural strength of the soft-pack battery cell 21 encapsulating the electrode lead-out portion 20a is relatively weak, when the soft-pack battery cell 20 leaks electrolyte at the electrode lead-out portion 20a of the soft-pack battery cell 20, the leaked electrolyte falls to the first conductor 41 and the second conductor 42 below by gravity, thereby making the first conductor 41 and the second conductor 42 conductive by the electrolyte. Then, the detection module can detect the conductive signal of the first conductor 41 and the second conductor 42 and determine that leakage has occurred, so as to achieve the purpose of timely detection of leakage.

[0097] Please refer to Figure 4 and Figure 7 In some embodiments, the first conductor 41 and the second conductor 42 are disposed on the inner bottom wall of the housing 10.

[0098] The inner bottom wall of the housing 10 refers to the surface inside the housing 10 used for connection and assembly. For example, when the housing 10 has a heat sink, protective plate, or other structure inside, the surface of the heat sink, protective plate, etc., is the inner bottom wall of the housing 10. Thus, the cover shell 30 can be connected to the surface of the heat sink, protective plate, etc., and the first conductor 41 and the second conductor 42 can also be disposed on the surface of the heat sink, protective plate, etc.

[0099] The first conductor 41 and the second conductor 42 are disposed on the inner bottom wall of the housing 10. Optionally, the first conductor 41 and the second conductor 42 may be located above the inner bottom wall of the housing 10, and the first conductor 41 and the second conductor 42 may form a gap with the inner bottom wall of the housing 10. For example, the first conductor 41 and the second conductor 42 may be routed through the covering shell 30. Alternatively, the first conductor 41 and the second conductor 42 may be fixed to the surface of the inner bottom wall of the housing 10, for example, by bonding them to the surface of the inner bottom wall of the housing 10 with an insulating film, or by coating the inner bottom wall of the housing 10 with an insulating layer and then bonding and fixing the first conductor 41 and the second conductor 42.

[0100] With this configuration, when electrolyte leakage occurs at the electrode lead-out portion 20a of the soft-pack battery cell 20 encapsulated in the soft-pack casing 21, the leaked electrolyte flows downward or drips onto the inner bottom wall of the housing 10. As a result, the electrolyte spreads and diffuses on the inner bottom wall of the housing 10, connecting the first conductor 41 and the second conductor 42. This allows the detection module to detect the conduction signal of the first conductor 41 and the second conductor 42 and determine that leakage has occurred, thus effectively improving the accuracy of the detection.

[0101] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, an adhesive layer 50 is provided on the inner bottom wall of the housing 10, and the cover shell 30 is bonded to the inner bottom wall of the housing 10 through the adhesive layer 50; an adhesive baffle 60 is also provided on the inner bottom wall of the housing 10, the adhesive baffle 60 surrounds the first conductor 41 and the second conductor 42 and is used to separate the adhesive layer 50.

[0102] The adhesive layer 50 refers to the adhesive structure applied to the inner bottom wall of the housing 10, such as structural adhesive.

[0103] By providing an adhesive layer 50 on the inner bottom wall of the housing 10, the casing 30 can be bonded and fixed through the adhesive layer 50, thus improving the assembly stability of the casing 30. At the same time, the soft-pack battery cell 20 located inside the casing 30 can also pass through the opening 301 of the casing 30 and be bonded and fixed through the adhesive layer 50, thus improving the stability of the soft-pack battery cell 20.

[0104] The adhesive baffle 60 refers to a structural component used to block the flow of adhesive; optionally, the adhesive baffle 60 may be, but is not limited to, an adhesive baffle strip, a baffle plate, an adhesive baffle block, an adhesive baffle rod, etc.

[0105] For example, in some embodiments, the adhesive barrier 60 can be an adhesive barrier strip, which can enclose a closed area for accommodating the first conductor 41 and the second conductor 42, so that the first conductor 41 and the second conductor 42 can be separated from the adhesive layer 50 outside the area enclosed by the adhesive barrier strip.

[0106] It should be understood that, based on the self-leveling properties of the adhesive structure, when the adhesive structure is coated on the inner bottom wall of the housing 10 to form a coating layer, the adhesive structure may automatically level on the inner wall surface of the housing 10 to form a uniform thickness; thus, when the first conductor 41 and the second conductor 42 are disposed on the inner bottom wall of the housing 10, the first conductor 41 and the second conductor 42 may be covered by the adhesive structure of the coating layer 50, thereby causing a decrease in detection sensitivity and accuracy of detection results.

[0107] With this configuration, by setting a baffle 60 on the inner bottom wall of the housing 10 and surrounding the first conductor 41 and the second conductor 42, the adhesive layer 50 is separated from the first conductor 41 and the second conductor 42, thereby effectively reducing the impact of the adhesive layer 50 on the first conductor 41 and the second conductor 42, and improving the accuracy of detecting leaked electrolyte.

[0108] Please refer to Figure 4 and Figure 9 In some embodiments, a groove 10a is provided on the inner bottom wall of the housing 10, and at least a portion of the first conductor 41 and at least a portion of the second conductor 42 are disposed in the groove 10a.

[0109] A groove 10a is provided on the inner bottom wall of the housing 10; optionally, the number of grooves 10a can be one or more.

[0110] For example, in some embodiments, the number of grooves 10a can be one, and the groove 10a can be located below the exposed electrode lead 20a of the soft-pack casing 21 of at least one soft-pack battery cell 20, or the groove 10a can be distributed below the exposed electrode lead 20a of the soft-pack casing 21 of all soft-pack battery cells 20.

[0111] Alternatively, in other embodiments, there may be multiple grooves 10a, with two grooves 10a provided below each cover shell 30, and the exposed electrode lead-out portion 20a of the soft-pack battery cell 20 housed in the cover shell 30 is located above the groove 10a on the same side.

[0112] With this configuration, by providing a groove 10a on the inner bottom wall of the housing 10 and placing at least a portion of the first conductor 41 and at least a portion of the second conductor 42 within the groove 10a, when electrolyte leakage occurs, the leaked electrolyte will flow into the groove 10a, making it easier for the first conductor 41 and the second conductor 42 within the groove 10a to conduct electricity. This further enhances the sensitivity and accuracy of detecting electrolyte leakage.

[0113] Please refer to Figure 4 , Figure 6 , Figure 7 and Figure 9 In some embodiments, a thermal management component 70 is provided on the inner bottom of the housing 10, and the inner bottom wall of the housing 10 is the surface of the thermal management component 70; in the direction of gravity Z, the bottom end of the covering shell 30 is connected to the thermal management component 70, and the first conductor 41 and the second conductor 42 are disposed on the thermal management component 70.

[0114] The thermal management component 70 can refer to a component used to achieve heat exchange, heat absorption, and cooling. The thermal management component 70 can be a plate-like structure with internal heat exchange channels. Optionally, the thermal management component 70 can be, but is not limited to, a metal or composite plate structure such as an aluminum plate, copper plate, iron plate, steel plate, copper-aluminum composite plate, or steel-aluminum composite plate. The thermal management component 70 can be fixedly installed on the inner bottom of the housing 10 by means of fastener connection, snap-fit ​​connection, or other methods.

[0115] For example, in some embodiments, the thermal management component 70 may include a heat exchange plate and a flow channel plate. The flow channel plate is processed by stamping, rolling or other methods to form a recessed channel. The heat exchange plate and the flow channel plate are welded together to form an integral part, and the heat exchange plate surrounds the channel to form a heat exchange flow channel.

[0116] The inner bottom wall of the housing 10 refers to the bottom wall surface inside the housing 10 used for connection and assembly; when the thermal management component 70 is fixedly installed on the inner bottom of the housing 10, the surface of the thermal management component 70 is the inner bottom wall of the housing 10, and the covering shell 30, the first conductor 41, the second conductor 42, the adhesive baffle 60, etc. can all be installed on the surface of the thermal management component 70.

[0117] In some embodiments, an adhesive layer 50 may be provided on the surface of the thermal management component 70, and the cover shell 30 is bonded and fixed to the thermal management component 70 through the adhesive layer 50. At the same time, the first conductor 41 and the second conductor 42 may be bonded and fixed to an insulating film layer (such as adhesive tape, release film, etc.), and then the insulating film layer may be bonded and fixed to the surface of the thermal management component 70, so as to reduce the probability of short circuit between the first conductor 41 and the second conductor 42 and the thermal management component 70, which would affect the detection results.

[0118] With this configuration, when the thermal management component 70 is installed inside the housing 10, the thermal management component 70 can conduct heat to the casing 30 to improve the heat dissipation effect on the soft-pack battery cell 20 inside the casing 30. At the same time, the casing 30, the first conductor 41 and the second conductor 42 can all be installed on the thermal management component 70 to facilitate connection and assembly as well as detection of leaked electrolyte.

[0119] Please refer to Figure 4 , Figure 10 and Figure 11 In some embodiments, the first conductor 41 and the second conductor 42 are disposed on the end side of the soft housing 21 where the electrode lead-out portion 20a is exposed, and the first conductor 41 and the second conductor 42 are spaced apart along the direction of gravity Z.

[0120] In this embodiment, the first conductor 41 and the second conductor 42 are disposed on the end side of the soft housing 21 where the electrode lead-out portion 20a is exposed; exemplarily, the first conductor 41 and the second conductor 42 can be respectively bonded and fixed to the soft housing 21.

[0121] The first conductor 41 and the second conductor 42 are spaced apart along the direction of gravity Z. Under normal conditions, the first conductor 41 and the second conductor are separated and disconnected. When electrolyte leakage occurs at the electrode lead-out portion 20a encapsulated in the soft-pack shell 21, the leaked electrolyte will flow downwards under the action of gravity, so that the electrolyte can flow through the first conductor 41 and the second conductor 42 in sequence and conduct the first conductor 41 and the second conductor 42 together. In this way, the detection module can detect the occurrence of electrolyte leakage.

[0122] With this configuration, when electrolyte leakage occurs, the leaked electrolyte flows downwards due to gravity and flows through the first conductor 41 and the second conductor 42, thereby enabling the detection module to detect the leakage in a timely manner and effectively improving the sensitivity and accuracy of the detection. At the same time, the first conductor 41 and the second conductor 42 are less affected by the adhesive layer 50 provided on the inner bottom wall of the housing 10.

[0123] Please refer to Figure 4 , Figure 6 , Figure 7 and Figure 11 In some embodiments, the shell 30 is provided with a through-structure 302, through which the first conductor 41 and the second conductor 42 pass.

[0124] The through-structure 302 refers to the through-structure opened on the shell 30; in this way, the first conductor 41 and the second conductor 42 can be laid through the through-structure 302 for wiring.

[0125] Optionally, the through-hole structure 302 includes, but is not limited to, a groove structure, a through-hole structure, etc.; for example, when the first conductor 41 and the second conductor 42 are arranged on the inner bottom wall of the housing 10, a groove structure can be provided at the bottom of the casing 30 to avoid the routing paths of the first conductor 41 and the second conductor 42, such as... Figure 7 As shown; or, when the first conductor 41 and the second conductor 42 are arranged above the inner bottom wall of the housing 10, or when the first conductor 41 and the second conductor 42 are located on the end side of the soft housing 21 where the electrode lead-out portion 20a is exposed, a through-hole structure or a groove structure can be opened on the housing 30 to facilitate the insertion of the first conductor 41 and the second conductor 42, such as... Figure 6 and Figure 10 As shown.

[0126] Optionally, in order to reduce the probability of short circuit between the casing 30 and the first conductor 41 and the second conductor 42, an insulating protective structure, such as an insulating film or an insulating coating, can be provided on the end face of the casing 30 facing the first conductor 41 and the end face facing the second conductor 42 to achieve insulating separation between the casing 30 and the first conductor 41 and the second conductor 42.

[0127] With this configuration, the first conductor 41 and the second conductor 42 can be routed through the through-structure 302, thereby improving the ease of routing the first conductor 41 and the second conductor 42.

[0128] Please refer to Figure 4 , Figure 7 and Figure 10 In some embodiments, the through-hole structure 302 includes a clearance groove 302a disposed at the end of the cover shell 30, through which the first conductor 41 and the second conductor 42 pass.

[0129] The clearance groove 302a refers to the groove structure formed by the inward indentation at the end of the covering shell 30. In some embodiments, the clearance groove 302a should be in a through state along the arrangement direction of the plurality of covering shells 30, so that the first conductor 41 and the second conductor 42 can pass through the clearance groove 302a and be routed to the plurality of covering shells 30, and the first conductor 41 and the second conductor 42 can form a gap with the inner wall surface of the clearance groove 302a (that is, the wall surface of the covering shell 30).

[0130] Optionally, the clearance groove 302a can be provided at the bottom end of the casing 30 along the gravity direction Z. In this way, when the first conductor 41 and the second conductor 42 are arranged on the inner bottom wall of the housing 10, the first conductor 41 and the second conductor 42 can pass through the clearance groove 302a at the bottom end of the casing 30, thereby reducing the influence of the casing 30 on the wiring of the first conductor 41 and the second conductor 42. Moreover, the first conductor 41 and the second conductor 42 can form a gap with the casing 30 to form an insulating separation, thereby reducing the probability of short circuit between the first conductor 41 and the second conductor 42 and the casing 30.

[0131] Alternatively, the clearance groove 302a can be provided at the side end of the casing 30, for example, at the side end where the electrode lead-out portion 20a is exposed. In this case, the first conductor 41 and the second conductor 42 can pass through the clearance groove 302a and be arranged above the inner bottom wall of the housing 10, or arranged at the end side of the soft casing 21 where the electrode lead-out portion 20a is exposed. An insulating layer can be provided on the inner wall surface of the clearance groove 302a, or an insulating layer that can be corroded by the electrolyte can be provided on the first conductor 41 and the second conductor 42 to form an insulating separation and reduce the probability of short circuit between the first conductor 41 and the second conductor 42 and the casing 30.

[0132] Please refer to Figure 4 and Figure 11 In some embodiments, the through-hole structure 302 includes a through-hole 302b disposed on the covering shell 30 and extending through it, through which the first conductor 41 and the second conductor 42 pass.

[0133] The through hole 302b can refer to a through hole structure that penetrates the covering shell 30 and forms a through hole structure; optionally, the first conductor 41 and the second conductor 42 can be inserted through the same through hole 302b, or the first conductor 41 and the second conductor 42 can be inserted through different through holes 302b respectively.

[0134] For example, in some embodiments, when the first conductor 41 and the second conductor 42 are arranged above the inner bottom wall of the housing 10, a through hole 302b can be provided in the housing 30 above the inner bottom wall of the housing 10, so that the first conductor 41 and the second conductor 42 can be routed through the through hole 302b.

[0135] Alternatively, in some other embodiments, when the first conductor 41 and the second conductor 42 are arranged on the end side of the soft housing 21 where the electrode lead-out portion 20a is exposed, a through hole 302b can be provided at the corresponding position of the housing 30. In this way, the first conductor 41 and the second conductor 42 arranged on the end side of the soft housing 21 where the electrode lead-out portion 20a is exposed can be routed through the through hole 302b.

[0136] An insulating layer can be provided on the inner wall of the through hole 302b, or an insulating film layer can be provided on the surface of the first conductor 41 and the second conductor 42 to achieve insulation separation between the shell 30 and the first conductor 41 and the second conductor 42.

[0137] With this configuration, by opening a through hole 302b on the casing 30, the first conductor 41 and the second conductor 42 can be arranged through the casing 30. In this way, the first conductor 41 and the second conductor 42 can be arranged through the casing 30 with low space occupation outside the casing 30, and at the same time, the probability of short circuit between the first conductor 41 and the second conductor 42 and the components outside the casing 30 can be effectively reduced.

[0138] Please refer to Figure 4 and Figure 12 In some embodiments, the projections of the first conductor 41 and the second conductor 42 are separated from the covering shell 30 in the direction of gravity Z.

[0139] In this embodiment, in the direction of gravity Z, the projections of the first conductor 41 and the second conductor 42 are set to be separated from the covering shell 30, that is, the first conductor 41 and the second conductor 42 are separated from the covering shell 30.

[0140] For example, in some embodiments, the first conductor 41 and the second conductor 42 may be spaced apart in the horizontal direction or in the gravitational direction Z, and the first conductor 41 and the second conductor 42 are positioned directly below the exposed portion of the electrode lead-out portion 20a, such as... Figure 12 As shown, there is a gap between the first conductor 41 and the second conductor 42 and the casing 30 to form an insulating separation. At the same time, the first conductor 41 and the second conductor 42 can detect electrolyte leakage from the electrode lead-out portion 20a encapsulated in the soft casing 21, so as to achieve the purpose of accurate detection.

[0141] With this configuration, the first conductor 41 and the second conductor 42 are separated from the casing 30, thereby reducing the probability that the first conductor 41 and the second conductor 42 may short-circuit with the casing 30, which would affect the accuracy of electrolyte leakage detection.

[0142] Please refer to Figures 4 to 6 In some embodiments, multiple covering shells 30 are arranged sequentially in the first direction X, and electrode leads 20a are formed at opposite ends of the electrode assembly in the second direction Y and exposed in the soft shell 21; wherein the first direction X, the second direction Y and the gravity direction Z are perpendicular to each other; in the second direction Y, a first conductor 41 and a second conductor 42 are provided on opposite sides of the soft shell 21, and the first conductor 41 and the second conductor 42 extend along the first direction X.

[0143] In this embodiment, multiple covering shells 30 can be arranged sequentially along the first direction X. Optionally, multiple covering shells 30 can be arranged sequentially along the first direction X to form a column; or, multiple covering shells 30 can be arranged sequentially along the first direction X to form two or more columns, and the columns can be spaced apart along the second direction Y.

[0144] The first direction X can be any direction perpendicular to the direction of gravity Z, such as the length direction of the box 10, the width direction of the box 10, or any direction intersecting the length direction and the width direction of the box 10. Similarly, the second direction Y can be any direction perpendicular to the direction of gravity Z, and the first direction X and the second direction Y are perpendicular to each other. For example, in some embodiments, the first direction X can be the length direction of the box 10, and the second direction Y can be the width direction of the box 10.

[0145] In the second direction Y, electrode leads 20a are formed at opposite ends of the electrode assembly and exposed in the soft housing 21. As a result, due to the weak structural strength of the encapsulated electrode leads 20a at opposite ends of the soft housing 21 in the second direction Y, electrolyte leakage is more likely to occur at the encapsulation points of the soft housing 21 in the second direction Y.

[0146] In the first direction X, a plurality of encapsulated shells 30 are arranged in sequence; thus, the electrode leads 20a of the plurality of encapsulated shells 30 located at the same end in the second direction Y are distributed in a roughly straight line along the first direction X.

[0147] In the second direction Y, a first conductor 41 and a second conductor 42 are provided on opposite sides of the soft housing 21; optionally, two sets of first conductors 41 and second conductors 42 are distributed on opposite sides of the soft housing 21, such that each set of first conductors 41 and second conductors 42 is respectively provided on the corresponding side of the soft housing 21 along the second direction Y, and each set of first conductors 41 and second conductors 42 extends along the first direction X.

[0148] Alternatively, the same set of first conductors 41 and second conductors 42 are distributed on opposite sides of the flexible housing 21. The set of first conductors 41 and second conductors 42 can be arranged around multiple housings 30 such that a portion of the first conductors 41 and a portion of the second conductors 42 are located on one side of the flexible housing 21 along the second direction Y, and another portion of the first conductors 41 and another portion of the second conductors 42 are located on the other side of the flexible housing 21 along the second direction Y.

[0149] With this configuration, the first conductor 41 and the second conductor 42 can be arranged along the first direction X to pass under the soft-pack outer shell 21 of each soft-pack battery cell 20 in the multiple encapsulation shells 30 where the electrode lead-out portion 20a extends. This allows for leakage detection of all soft-pack battery cells 20, and the arrangement and routing of the first conductor 41 and the second conductor 42 is relatively simple, requiring only a straight line arrangement along the first direction X.

[0150] Please refer to Figure 4 , Figure 6 and Figure 10 In some embodiments, the end face of the casing 30 facing the first conductor 41 and the second conductor 42 is provided with an insulating layer 80.

[0151] Optionally, the insulating layer 80 includes, but is not limited to, insulating film layers (such as polyester film, polypropylene film, etc.), insulating coatings (epoxy resin coating, polyurethane coating, etc.), and other layer structures with insulating properties.

[0152] For example, in some embodiments, the first conductor 41 and the second conductor 42 may be arranged on the inner bottom wall of the housing 10. In the direction of gravity Z, the bottom end of the covering shell 30 is the end face facing the first conductor 41 and the second conductor 42. Therefore, an insulating layer 80 is covered at the bottom end of the covering shell 30.

[0153] Alternatively, in some other embodiments, a clearance groove 302a may be provided on the shell 30. The clearance groove 302a is arranged through the second direction Y, and the first conductor 41 and the second conductor 42 can be routed through the clearance groove 302a. In this way, an insulating layer 80 can be applied to the inner wall of the clearance groove 302a.

[0154] Alternatively, in other embodiments, a through hole 302b may be provided on the casing 30, through which the first conductor 41 and the second conductor 42 may be routed; thus, an insulating layer 80 may be provided on the inner wall of the through hole 302b.

[0155] With this configuration, the insulating layer 80 provides insulation protection for the casing 30, thereby achieving insulation separation between the casing 30 and the first conductor 41 and the second conductor. This effectively reduces the probability of a short circuit between the casing 30 and the first conductor 41 and the second conductor 42, which could affect the accuracy of the detection.

[0156] Please refer to Figures 4 to 6 In some embodiments, the surfaces of the first conductor 41 and the second conductor 42 are covered with a separating layer 90, which is configured to decompose as the electrolyte flows through it.

[0157] The separator 90 refers to the structure used to form an insulating separation between the first conductor 41 and the second conductor 42 and the covering shell 30, and / or to form a separation between the first conductor 41 and the second conductor 42.

[0158] Optionally, the separator 90 may be, but is not limited to, a membrane structure such as a polyvinyl chloride membrane, a polyethylene membrane, or a polyester membrane. In this way, the separator 90 has better insulation performance under normal conditions. At the same time, in the event of electrolyte leakage, when the electrolyte flows through the separator 90, the separator 90 is easily corroded and decomposed, thereby making the first conductor 41 and the second conductor 42 easily conductive by the electrolyte, so that the detection module can detect the leakage.

[0159] With this configuration, the separator layer 90 can isolate and protect the first conductor 41 and the second conductor 42, thereby reducing the probability of short circuits between the first conductor 41 and the second conductor 42 and the casing 30, which would affect the detection results. At the same time, when leakage occurs, the leaked electrolyte can corrode and decompose the separator layer 90, allowing the electrolyte to contact and conduct the first conductor 41 and the second conductor 42, so that the detection module can detect the leakage. This can effectively improve the accuracy of leakage detection and effectively reduce the occurrence of false detections.

[0160] Please refer to Figure 4 , Figure 6 and Figure 13 In some embodiments, the enclosure shell 30 includes two first shell portions 31 spaced apart and a second shell portion 32 disposed at the same end of the two first shell portions 31 along the gravity direction Z; in the gravity direction Z, an opening 301 is formed between the ends of the two first shell portions 31 facing away from the second shell portion 32; the two first shell portions 31 are connected to the inner bottom wall of the housing 10, and the two first shell portions 31 are insulated and separated from the first conductor 41 and the second conductor 42.

[0161] The first housing portion 31 and the second housing portion 32 refer to two different parts of the covering shell 30; the second housing portion 32 and the two spaced-apart first housing portions 31 can be combined together to form a covering shell 30 with a U-shaped cross-section. In this way, the pouch cell 20 can be accommodated in the area enclosed by the first housing portion 31 and the second housing portion 32.

[0162] In the gravitational direction Z, an opening 301 is formed between the ends of the two first housing portions 31 facing away from the second housing portion 32; thereby, the pouch cell 20 can be assembled between the two first housing portions 31 through the opening 301. In the second direction Y, a gap is also formed between the end of the second housing portion 32 and the end of the two first housing portions 31, so that the electrode lead-out portion 20a of the pouch cell 20 can be exposed at this point to facilitate the electrical connection operation of the electrode lead-out portion 20a.

[0163] The two first housing portions 31 are connected to the inner bottom wall of the housing 10, for example, by welding or bonding, to improve the assembly stability of the cover shell 30. Simultaneously, the soft-pack battery cell 20 assembled between the two first housing portions 31 can also have its soft-pack outer shell 21 fixed to the inner bottom wall of the housing 10 at the opening 301 by bonding, thereby improving the assembly stability of the soft-pack battery cell 20.

[0164] The two first housing portions 31 are insulated from the first conductor 41 and the second conductor 42 to reduce the probability of short circuit between the first housing portion 31 and the first conductor 41 and the second conductor 42.

[0165] With this configuration, the first housing portion 31 and the second housing portion 32 can be combined to form a covering shell 30 for housing the soft-pack battery cell 20, and the two first housing portions 31 are insulated and separated from the first conductor 41 and the second conductor 42 to reduce the influence of the first housing portion 31 on the leakage detection results.

[0166] Please refer to Figure 4 In some embodiments, the battery device 100 further includes a power distribution device (not shown in the figure), which is housed within the housing 10 and is electrically connected to the pouch battery cell 20 and the detection module.

[0167] A power distribution device is used to control the operation of high-voltage circuits in electrical devices. Here, "voltage" in high-voltage circuit refers to a circuit with a voltage exceeding 60V. For example, a power distribution device can be a high-voltage distribution box, which can be used to manage the power distribution of high-voltage circuits in electrical devices. For instance, a PDU (Power Distribution Unit) used in new energy vehicles is responsible for power distribution and management in the high-voltage circuits of new energy vehicles, providing functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control, protecting and monitoring the operation of the high-voltage circuits. A high-voltage distribution box can also refer to a component used in a battery device 100100 to control battery charging and discharging, such as a BDU (Battery Disconnect Unit). A BDU is a high-voltage distribution box specifically designed for batteries, controlling their charging and discharging.

[0168] The power distribution device is electrically connected to the pouch battery cell 20 and the heating structure; optionally, the power distribution device can be electrically connected to the electrode lead-out portion 20a of the pouch battery cell 20 through a conductive structure (such as a copper sheet, aluminum sheet or other metal conductor); in this way, power distribution and management of the pouch battery cell 20 can be realized, as well as power supply to the detection module can be realized.

[0169] This setup allows the power distribution unit to power the detection module, eliminating the need for a separate power supply and effectively reducing costs.

[0170] Please refer to Figure 4 In some embodiments, the leakage detection device 40 further includes an alarm module (not shown in the figure), which is electrically connected to the detection module; the detection module is configured to send an electrical signal to the alarm module when the first conductor 41 and the second conductor 42 are connected, so that the alarm module issues an alarm.

[0171] An alarm module refers to a module structure used to issue alarm signals for alerting others. Optionally, an alarm module includes, but is not limited to, structures such as buzzers and flashing lights used to provide sound or light alerts.

[0172] Optionally, the alarm module can be located outside the battery device 100. For example, when the battery device 100 is used in a vehicle, the alarm device can be located in the vehicle's cockpit to alert the driver.

[0173] With this configuration, when the detection module detects a leaking electrolyte, it can control the alarm module to issue an alarm, thus providing a notification.

[0174] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0175] Please refer to Figures 4 to 13 In this embodiment, the battery device 100 includes a pouch battery cell 20, a housing 10, multiple casings 30, and a leakage detection device 40; wherein, a thermal management component 70 is provided on the inner bottom of the housing 10. The pouch battery cell 20 includes a pouch casing 21 and an electrode assembly encapsulated inside the pouch casing 21. In the second direction Y, the electrode assembly has electrode leads 20a with opposite polarities at opposite ends, and at least a portion of the electrode leads 20a is exposed outside the pouch casing 21.

[0176] Multiple housing shells 30 are housed within the casing 10, arranged sequentially in the first direction X; each housing contains at least one pouch cell 20. Each housing shell 30 includes two spaced-apart first housing portions 31 and a second housing portion 32 disposed at the same end of the two first housing portions 31 along the gravity direction Z; an opening 301 is formed between the ends of the two first housing portions 31 facing away from the second housing portion 32 in the gravity direction Z; the two first housing portions 31 are connected to a thermal management component 70. The first direction X, the second direction Y, and the gravity direction Z are all perpendicular to each other.

[0177] The leakage detection device 40 includes a detection module and a first conductor 41 and a second conductor 42 electrically connected to the detection module, with the first conductor 41 and the second conductor 42 spaced apart. Specifically, the leakage detection device 40 includes two sets of first conductors 41 and second conductors 42. In the second direction Y, a set of first conductors 41 and a set of second conductors 42 are respectively disposed at opposite ends of the casing 30, and each set of first conductors 41 and second conductors 42 extends along the first direction X, such that each set of first conductors 41 and second conductors 42 is located below the electrode lead-out portion 20a of each pouch battery cell 20. Thus, when leakage occurs at the electrode lead-out portion 20a encapsulated by the pouch casing 21 of the pouch battery cell 20, the leaked electrolyte flows downwards due to gravity, conducting the first conductors 41 and the second conductor 42, allowing the detection module to detect the conduction signal of the first conductors 41 and the second conductor 42 and determine that leakage has occurred. Meanwhile, the first conductor 41 and the second conductor 42 form an insulating separation from the first housing portion 31 to reduce the impact of the covering shell 30 on leakage detection.

[0178] Please refer to Figure 1 and Figure 4 Secondly, embodiments of this application also provide an electrical device, which includes a battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0179] The electrical device provided in this application includes the battery device 100 described above. Therefore, when the battery device 100 used in the electrical device leaks electrolyte, it can be detected by the leakage detection device 40, so as to deal with the leakage in a timely manner and reduce the risk of using the electrical device.

[0180] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that: include A pouch battery cell includes a pouch casing and an electrode assembly encapsulated inside the pouch casing. The electrode assembly has an electrode lead-out portion at its end, and at least a portion of the electrode lead-out portion is exposed outside the pouch casing. The housing contains the individual pouch battery cells; Multiple casings are housed within the box, and each casing contains a single soft-pack battery cell; in the direction of gravity, the bottom end of each casing has an opening, and the bottom end of each casing is connected to the box. as well as A leakage detection device includes a detection module and a first conductor and a second conductor electrically connected to the detection module, the first conductor and the second conductor being spaced apart; the first conductor and the second conductor are distributed below the electrode leads of each of the pouch cell cells, and the first conductor and the second conductor are insulated from the casing.

2. The battery device according to claim 1, characterized in that: The first conductor and the second conductor are disposed on the inner bottom wall of the housing.

3. The battery device according to claim 2, characterized in that: An adhesive layer is provided on the inner bottom wall of the box, and the covering shell is bonded to the inner bottom wall of the box through the adhesive layer; an adhesive-blocking member is also provided on the inner bottom wall of the box, and the adhesive-blocking member surrounds the first conductor and the second conductor and is used to separate the adhesive layer.

4. The battery device according to claim 2 or 3, characterized in that: A groove is provided on the inner bottom wall of the box, and at least a portion of the first conductor and at least a portion of the second conductor are disposed in the groove.

5. The battery device according to any one of claims 2 to 4, characterized in that: A thermal management component is provided on the inner bottom of the housing, and the inner bottom wall of the housing is the surface of the thermal management component; in the direction of gravity, the bottom end of the covering shell is connected to the thermal management component, and the first conductor and the second conductor are disposed on the thermal management component.

6. The battery device according to claim 1, characterized in that: The first conductor and the second conductor are disposed on the end side of the soft-pack shell where the electrode lead-out portion is exposed, and the first conductor and the second conductor are spaced apart along the direction of gravity.

7. The battery device according to any one of claims 2 to 6, characterized in that: The covering shell is provided with a through-hole structure, through which the first conductor and the second conductor pass.

8. The battery device according to claim 7, characterized in that: The through-hole structure includes a clearance groove disposed at the end of the covering shell, through which the first conductor and the second conductor pass.

9. The battery device according to claim 7, characterized in that: The through-hole structure includes a through-hole disposed on the covering shell, through which the first conductor and the second conductor pass.

10. The battery device according to any one of claims 2 to 6, characterized in that: In the direction of gravity, the projections of the first conductor and the second conductor are separated from the covering shell.

11. The battery device according to any one of claims 1 to 10, characterized in that: In a first direction, a plurality of the covering shells are arranged sequentially; in a second direction, the electrode assembly forms electrode leads at opposite ends and is exposed outside the soft-shell shell; wherein the first direction, the second direction, and the direction of gravity are perpendicular to each other. In the second direction, the first conductor and the second conductor are provided on opposite sides of the soft-pack shell, and the first conductor and the second conductor extend and are arranged along the first direction.

12. The battery device according to any one of claims 1 to 11, characterized in that: The end faces of the casing facing the first conductor and the second conductor are provided with an insulating layer.

13. The battery device according to any one of claims 1 to 12, characterized in that: The surfaces of the first conductor and the second conductor are covered with a separating layer, which is configured to decompose as the electrolyte flows through it.

14. The battery device according to any one of claims 1 to 13, characterized in that: The covering shell includes two first shell portions spaced apart and a second shell portion disposed at the same end of the two first shell portions along the direction of gravity; In the direction of gravity, the opening is formed between the ends of the two first housing portions facing away from the second housing portion; the two first housing portions are connected to the inner bottom wall of the box, and the two first housing portions are insulated from and separated from the first conductor and the second conductor.

15. The battery device according to any one of claims 1 to 14, characterized in that: The battery device also includes a power distribution device, which is housed within the casing and is electrically connected to the individual pouch battery cells and the detection module.

16. The battery device according to any one of claims 1 to 15, characterized in that: The leakage detection device further includes an alarm module, which is electrically connected to the detection module. The detection module is configured to send an electrical signal to the alarm module when the first conductor and the second conductor are in phase, so that the alarm module will issue an alarm.

17. An electrical device, characterized in that: The electrical device includes a battery device as described in any one of claims 1 to 16, the battery device being used to provide electrical energy.

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