Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device, and relates to the technical field of batteries, wherein the battery device comprises a battery box, a battery monomer assembly and a low-voltage sampling module, the battery box is provided with a containing cavity; the battery monomer assembly is arranged in the containing cavity, the battery monomer assembly comprises a plurality of battery monomer groups arranged along a first direction, each battery monomer group comprises a plurality of battery monomers arranged along a second direction, and the first direction and the second direction intersect, wherein the battery monomer has a first surface oppositely arranged along the first direction and a second surface oppositely arranged along the second direction, the first surface and the second surface form a side wall of the battery monomer, and the surface area of the second surface is greater than that of the first surface; the low-voltage sampling module is arranged in the containing cavity, and at least part of the low-voltage sampling module is located on one side of the battery monomer assembly along the first direction, and the first direction is the width direction of the battery device. The technical scheme of the application can increase the number of battery monomers of the battery device.

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] With the rapid development of new energy vehicles, batteries are increasingly coming into the public eye. Battery devices typically include battery cell assemblies composed of multiple individual battery cells, which can be connected in series, parallel, or series-parallel in a battery box.

[0003] In related technologies, a battery cell assembly includes at least one column of battery packs, and each column of battery packs includes multiple battery cells stacked along the length of the battery device. However, the battery box has a limited length dimension, which affects the number of battery cells in the battery box. Utility Model Content

[0004] The main objective of this application is to provide a battery device and an electrical device that aim to increase the number of battery cells in the battery device.

[0005] To achieve the above objectives, the battery device proposed in this application includes:

[0006] The battery box has a receiving cavity;

[0007] A battery cell assembly, disposed within the receiving cavity, includes a plurality of battery cell groups arranged along a first direction, and a plurality of battery cell groups arranged along a second direction, the first and second directions intersecting. Each battery cell has a first surface opposite to each other in the first direction and a second surface opposite to each other in the second direction, the first and second surfaces forming sidewalls of the battery cell, the surface area of ​​the second surface being larger than the surface area of ​​the first surface.

[0008] A low-pressure sampling module is disposed within the receiving cavity. The low-pressure sampling module is configured to collect low-pressure data of the battery cell assembly. At least a portion of the low-pressure sampling module is located on one side of the battery module along a first direction, where the first direction is the width direction of the battery device.

[0009] The technical solution of this application reduces the space occupied by the low-voltage sampling module in the length direction of the battery device by setting at least a part of the structure of the low-voltage sampling module on one side of the width direction of the battery device, so that more battery cells can be stacked in the length direction of the battery device to increase the number of battery cells in the battery device.

[0010] In one embodiment, the low-voltage sampling module includes a first sampling module and a second sampling module, the first sampling module and the second sampling module being located on different sides of the battery cell assembly;

[0011] At least one of the first sampling module and the second sampling module is located on the side of the battery cell assembly along the first direction.

[0012] Using the above method, one of the first sampling module and the second sampling module can be set on one side of the battery cell assembly along the width direction of the battery device, or both the first sampling module and the second sampling module can be set on the side of the battery cell assembly along the width direction of the battery device. Both methods can reduce the space occupied by the low-voltage sampling module in the length direction of the battery device.

[0013] In one embodiment, along the first direction, the first sampling module and the second sampling module are respectively located on both sides of the battery cell assembly.

[0014] By employing the above method, the low-voltage sampling modules are distributed on both sides of the battery cell assembly, making full use of the space in the width direction of the battery box and effectively reducing the space occupied by the low-voltage sampling modules in the length direction of the battery unit. This allows for an effective increase in the number of battery cells in the battery cell assembly. Furthermore, both the first and second sampling modules have ample installation space, avoiding interference during assembly and disassembly. In this way, the space on both sides of the battery box in the width direction can be used for the arrangement of low-voltage connection harnesses, maximizing the utilization of the internal space of the battery box.

[0015] In one embodiment, the first sampling module is configured as a temperature sampling module;

[0016] And / or, the second sampling module is configured as a voltage sampling module.

[0017] By adopting the above method, the temperature sampling module and the voltage sampling module in the low-voltage sampling module are set up separately. This allows for targeted maintenance when one of the signal acquisition modules fails, improving maintenance convenience and reducing mutual interference between the temperature sampling signal and the voltage sampling signal.

[0018] In one embodiment, the battery device further includes a first adhesive barrier structure disposed on the bottom wall of the receiving cavity and extending along the edge of the battery cell assembly. The first adhesive barrier structure is located in the region between the battery cell assembly and the low-voltage sampling module.

[0019] Using the above method, during the process of injecting adhesive into the battery box to bond and fix the battery cells to the receiving cavity, the adhesive can be blocked by the first adhesive-blocking structure to prevent it from flowing into the installation area of ​​the low-voltage sampling module, thus preventing the low-voltage sampling module from getting contaminated with adhesive and avoiding any impact on the disassembly and assembly of the low-voltage sampling module. At the same time, the first adhesive-blocking structure allows adhesive to be injected within its height range, enabling the battery cells to also bond to the first adhesive-blocking structure. This improves the connection strength and stability of the battery cells installed in the battery box, reduces the risk of battery cells detaching, and is beneficial for improving the overall main frequency of the module.

[0020] In one embodiment, the battery box includes a base plate for forming the bottom wall of the receiving cavity, and the first adhesive barrier structure is integrally formed with the base plate.

[0021] This design not only improves the ease of manufacturing the battery box and the first adhesive barrier structure, reducing assembly steps, but also enhances the connection strength between the first adhesive barrier structure and the battery box, thereby improving the connection strength between the battery cell assembly and the battery box and increasing the overall structural stability.

[0022] In one embodiment, the battery box includes a base plate, two first side plates disposed opposite to each other along the first direction, and two second side plates disposed opposite to each other along the second direction, wherein the base plate is integrally formed with at least one of the first side plates.

[0023] Using the above method, the battery box is easier to manufacture, which helps to improve production efficiency; and it can also improve the structural strength of the battery box.

[0024] In one embodiment, the battery device further includes a second adhesive barrier structure disposed on the bottom wall of the receiving cavity;

[0025] The second adhesive barrier structure is located on one side of the battery cell assembly along the second direction and extends along the edge of the battery cell assembly, the second direction intersecting the first direction.

[0026] Using the above method, during the process of injecting adhesive into the battery box to bond and fix the battery cells to the receiving cavity, the adhesive can be blocked by the second adhesive-blocking structure, preventing the adhesive from flowing to the sides of the battery cells in the second direction, thereby reducing the impact on the components arranged in that area. Furthermore, the second adhesive-blocking structure can also limit and position the battery cells, ensuring accurate installation. Additionally, the second adhesive-blocking structure can also act as a reinforcing rib, improving the structural strength of the battery box.

[0027] In one embodiment, the side wall of the battery box is provided with an installation port communicating with the receiving cavity, and the low-voltage sampling module is detachably installed in the installation port.

[0028] Using the above method, the low-voltage sampling module can be directly installed and removed from the outside of the battery box. When maintenance of the low-voltage sampling module is required, it can be removed from the installation port without opening the battery box cover, thus improving the convenience of maintenance of the low-voltage sampling module.

[0029] In one embodiment, the low-voltage sampling module includes:

[0030] A connecting bracket, which covers the mounting opening from the outside of the receiving cavity and is detachably connected to the battery box; and

[0031] The module body is disposed on the surface of the connecting bracket facing the receiving cavity.

[0032] By employing the above method, the mounting opening can be sealed using the connecting bracket, ensuring the airtightness of the battery box and reducing the risk of foreign objects entering the cavity. The connecting bracket and the outer wall of the battery box also act as a limit, preventing the low-voltage sampling module from excessively extending into the cavity. Simultaneously, this method increases the connection area between the low-voltage sampling module and the battery box, thereby improving the connection strength.

[0033] In one embodiment, the connecting bracket includes:

[0034] A connecting part is provided around the mounting opening in the circumferential direction. The connecting part covers the outer wall of the battery box and is detachably connected to the battery box.

[0035] A protrusion is provided that protrudes toward the receiving cavity relative to the connecting portion, and the module body is provided on the surface of the protrusion toward the receiving cavity.

[0036] By using the above method, a protective structure is formed by the cooperation of the protrusion and the side wall of the battery box at the edge of the mounting opening. This can prevent the flame from spreading outward along the mounting opening when a fire occurs inside the battery device, and can prevent the flame from directly contacting the external components of the housing cavity. For example, it can prevent the flame from directly contacting the seal between the connection part and the outer wall of the battery box.

[0037] In one embodiment, the sidewall where the protrusion connects to the connecting portion is inclined or bent in a direction away from the connecting portion.

[0038] Using the above method, the cross-sectional size of the protrusion gradually decreases along the direction close to the receiving cavity, so that the protrusion will not interfere with the edge of the mounting port when it is inserted into the mounting port for installation. It also allows the connection part to be installed close to the outer wall of the battery box, avoiding the problem of unstable installation caused by installation gaps. In addition, it also ensures that the protrusion and the side wall of the battery box at the edge of the mounting port can form a better protective structure.

[0039] In one embodiment, the battery device further includes a low-voltage connection harness, the low-voltage sampling harness extending along the side wall of the battery box, and the low-voltage sampling module being electrically connected to the battery cell assembly via the low-voltage sampling harness.

[0040] The above method utilizes the space on the side wall of the battery box to arrange low-voltage connection harnesses, thereby maximizing the use of the internal space of the battery box.

[0041] In one embodiment, the low-voltage connection harness includes a first harness, a second harness, and a third harness. The first harness is fixed to the side wall of the battery box, and the second harness extends from a first branch point of the first harness toward the battery cell assembly and is electrically connected to the battery cell assembly.

[0042] The third wiring harness extends from the second branch point of the first wiring harness toward the low-voltage sampling module and is electrically connected to the low-voltage sampling module. The length of the third wiring harness is greater than the distance between the second branch point and the low-voltage sampling module.

[0043] By adopting the above method, the third wire harness in the low-voltage connection harness, which extends from the branch of the first wire harness to the low-voltage sampling module, is set to be longer, which is redundant compared to the distance between the first wire harness and the low-voltage sampling module, thereby facilitating the assembly and disassembly of the low-voltage sampling module.

[0044] In one embodiment, the battery device further includes a low-voltage connector configured for electrical connection to an external device, and the low-voltage connection harness is electrically connected to the low-voltage connector. In this configuration, the battery device can be electrically connected to an external device via the low-voltage connector for transmitting low-voltage signals or for powering low-power devices.

[0045] In one embodiment, the low-voltage connection harness is detachably connected to the low-voltage sampling module.

[0046] This configuration allows the low-voltage sampling module to be removed entirely from the battery compartment without needing to be disassembled and reassembled together with the low-voltage connection harness.

[0047] In one embodiment, the battery device further includes a high-voltage circuit module disposed on the side wall of the battery box and electrically connected to the battery cell assembly.

[0048] The high-voltage circuit module is equipped with a high-voltage connector, which is configured for electrical connection with external equipment.

[0049] Using the above method, the battery device can be electrically connected to external equipment through a high-voltage connector to transmit a large current to meet the power supply needs of high-power devices.

[0050] In one embodiment, the high-voltage circuit module is provided with a high-voltage interlock circuit, and the low-voltage sampling module is electrically connected to the high-voltage interlock circuit.

[0051] In this configuration, the high-voltage interlock circuit is a protective circuit used to detect the integrity or continuity of the high-voltage circuit. It detects the on / off status of the high-voltage circuit through a low-voltage signal, so that when an abnormal disconnection of the high-voltage circuit is detected, an alarm is triggered in time and the high-voltage power supply is cut off to avoid the risk of electric shock.

[0052] In one embodiment, the high-voltage circuit module includes a maintenance switch circuit breaker.

[0053] Using the above method, the high-voltage circuit can be physically disconnected manually through the maintenance switch circuit breaker, ensuring that the risk of high-voltage electric shock is avoided during maintenance. Furthermore, the maintenance switch circuit breaker can work in conjunction with a high-voltage interlock circuit, triggering the high-voltage interlock function when the high-voltage circuit is disconnected via the maintenance switch circuit breaker, further cutting off the high-voltage circuit.

[0054] In one embodiment, the battery cell assembly is configured as a battery module, and multiple battery cells are connected together as an integral module via connectors.

[0055] By adopting the above method, multiple battery cells are formed into an integrated module structure, which facilitates the management and disassembly of battery cell components.

[0056] This application also proposes an electrical device, including a battery device as described in any of the foregoing embodiments.

[0057] By using the battery device described in the preceding embodiments of this application in an electrical device, the battery capacity of the electrical device can be increased, which is beneficial to improving the battery life and voltage.

[0058] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0060] Figure 1 This is a structural diagram of a vehicle according to some embodiments of this application;

[0061] Figure 2 Exploded views of a battery device according to some embodiments of this application;

[0062] Figure 3 for Figure 2 Exploded view of the battery unit with the battery module removed;

[0063] Figure 4 for Figure 2 Structural diagram of the battery unit with battery modules and case cover removed;

[0064] Figure 5 for Figure 4 A structural diagram from another perspective;

[0065] Figure 6 A cross-sectional view of a battery device according to some embodiments of this application;

[0066] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0067] Figure 8 This is a structural diagram of the housing in a battery device according to some embodiments of this application.

[0068] Explanation of icon numbers:

[0069] 1000. Vehicle; 100. Battery device; 10. Battery box; 11. Box body; 111. Base plate; 112. First side plate; 113. Second side plate; 114. Receiving cavity; 115. Mounting port; 12. Box cover; 13. First sealing structure; 14. Second sealing structure; 20. Battery module; 30. Low-voltage sampling module; 31. Connecting bracket; 311. Connecting part; 312. Protrusion; 32. Module body; 301. First sampling module; 302. Second sampling module; 40. Low-voltage connecting harness; 41. First harness; 42. Second harness; 43. Third harness; 50. High-voltage circuit module; 51. High-voltage connector; 60. Low-voltage connector; 200. Controller; 300. Motor; X, First direction; Y, Second direction.

[0070] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0071] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0073] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0074] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0075] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0076] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0077] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0078] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0079] Currently, judging from market trends, the application of power batteries 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 extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in rail transportation, military equipment, and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0080] In related technologies, a battery module includes at least one column of battery packs, each column of battery packs including multiple battery cells stacked along the length of the battery device. However, the battery box has a limited length dimension, which affects the number of battery cells in the battery box.

[0081] Based on the above considerations, in order to solve the problem of limited battery cell quantity in a battery device, a battery device is designed. The battery device includes a battery box, a battery cell assembly, and a low-voltage sampling module. The battery box has a receiving cavity. The battery cell assembly is located in the receiving cavity. The battery cell assembly includes multiple battery cell groups arranged along a first direction, and each battery cell group includes multiple battery cells arranged along a second direction. The first and second directions intersect. Each battery cell has a first surface arranged opposite to each other in the first direction and a second surface arranged opposite to each other in the second direction. The first and second surfaces form the sidewalls of the battery cell, and the surface area of ​​the second surface is larger than the surface area of ​​the first surface. The low-voltage sampling module is located in the receiving cavity, and at least part of the low-voltage sampling module is located on one side of the battery cell assembly along the first direction, which is the width direction of the battery device.

[0082] Such a battery device, by placing at least a portion of the structure of the low-voltage sampling module on one side of the width direction of the battery device, can reduce the space occupied by the low-voltage sampling module in the length direction of the battery device, and allow more battery cells to be stacked in the length direction of the battery device, thereby increasing the number of battery cells in the battery device.

[0083] The battery device in this application can serve as a power source or power system for an electrical device. The battery device refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. This is beneficial for improving the overall performance of the battery device and facilitating its promotion.

[0084] The aforementioned electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, spacecraft, etc. Among them, electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0085] For ease of explanation, the following embodiments will be described using a vehicle or rail train as an example of an electrical device according to an embodiment of this application.

[0086] 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.

[0087] The vehicle 1000 can be a rail train, a fuel-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 installed inside the vehicle, and the battery can be located at the bottom, front, or rear of the vehicle. The battery 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 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of starting, navigating, and driving the vehicle 1000. In some embodiments of this application, the battery device 100 can also serve 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, and can also be used to power electrical appliances on the vehicle 1000.

[0088] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 20 for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0089] In some embodiments, the battery cell assembly 20 is typically formed by arranging a plurality of battery cells.

[0090] As an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0091] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 11 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed within the housing 11. As an example, the battery cell assembly 20 may be a battery module, which can be housed within the housing 11 by securing the battery module to the housing 11. Alternatively, the battery cell assembly 20 may be housed within the housing 11 by directly securing multiple battery cells to the housing 11.

[0092] The battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, or other shapes.

[0093] Please refer to Figure 2 The battery device 100 proposed in this application includes a battery box 10, a battery cell assembly 20, and a low-voltage sampling module 30. The battery box 10 is provided with a receiving cavity 114. The battery cell assembly 20 is disposed in the receiving cavity 114. The battery cell assembly 20 includes a plurality of battery cell groups arranged along a first direction X. The battery cell groups include a plurality of battery cells arranged along a second direction X. The first direction X intersects the second direction Y. The battery cell has a first surface arranged opposite to each other in the first direction X and a second surface arranged opposite to each other in the second direction Y. The first surface and the second surface form the sidewall of the battery cell. The surface area of ​​the second surface is larger than the surface area of ​​the first surface. The low-voltage sampling module 30 is disposed in the receiving cavity 114. The low-voltage sampling module 30 is configured to collect low-voltage data of the battery cell assembly 20. At least a portion of the low-voltage sampling module 30 is located on one side of the battery cell assembly 20 along the first direction X, which is the width direction of the battery device 100.

[0094] In this embodiment, the battery box 10 can be configured as a cuboid or other polygonal structure. The battery box 10 typically includes a body 11 and a cover 12. The body 11, as the main structure of the battery box 10, includes a base plate 111 and side walls surrounding the base plate 111. The base plate 111 and the side walls enclose a receiving cavity 114 with an opening. The opening of the receiving cavity 114 is positioned opposite to the base plate 111 along the height direction of the battery box 10. The cover 12 is a component that covers the opening of the body 11 to isolate the receiving cavity 114 from the external environment. The shape of the cover 12 can be adapted to the shape of the body 11 to fit the body 11. Optionally, a fireproof layer can be provided on the inner wall of the battery box 10 to prevent the battery box 10 from being burned through and causing the flames to spread outward when the battery cells or other devices inside the battery box 10 catch fire. Of course, in some embodiments, a fireproof layer can also be provided on the outer wall of the battery box 10 to prevent the flames from burning through the battery box 10 and igniting the battery cells inside when the outside catches fire, thus avoiding greater safety hazards.

[0095] The battery cell assembly 20 is composed of multiple battery cells, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can also be directly connected in series, parallel, or in a mixed manner. In this embodiment, the battery cell assembly 20 includes multiple rows of battery cell groups arranged side-by-side along the width direction of the battery device 100, and each row of battery cell groups includes multiple battery cells stacked along the length direction of the battery device 100. The battery cell assembly 20 can be fixed in the battery box 10 by at least one method, such as structural adhesive bonding, compression fixing, or bolt fastening. Optionally, each battery cell of the battery cell assembly 20 can be fixed individually in the receiving cavity 114, or the battery cell assembly 20 can be configured as a battery module, with multiple battery cells connected as a whole module by cable ties or other connectors and fixed together in the receiving cavity 114.

[0096] The battery cell is configured as a square battery, which has two first surfaces arranged opposite each other along the first direction X and two second surfaces arranged opposite each other along the second direction Y. The surface area of ​​the second surface is larger than that of the first surface. That is, in the same group of battery cells, the larger surfaces of two adjacent battery cells are arranged opposite each other or even attached to each other. With this arrangement, more battery cells can be stacked in a group of battery cells in the second direction Y (i.e., the length direction of the battery device 100), thereby improving space utilization.

[0097] The low-voltage sampling module 30 is a functional module used to collect low-voltage data such as voltage and temperature of the battery cell assembly 20 in the battery device 100. It can monitor the status of the battery cell assembly 20 in real time to ensure the safe and efficient operation of the battery cell assembly 20. The low-voltage sampling module 30 is usually used in conjunction with the battery management system. It acquires low-voltage signal parameters such as voltage and temperature of the battery cell assembly 20 through sensors and sampling circuits, and transmits these signals to the battery management system for processing and analysis. The battery management system can be set up in the battery box 10 or set up independently of the battery box 10.

[0098] The low-voltage sampling module 30 includes, but is not limited to, voltage sampling circuits and temperature sampling circuits; optionally, the low-voltage sampling module 30 may also be equipped with an analog-to-digital converter for converting voltage / temperature signals into digital signals; it may also include protection circuits, filtering circuits, and other modules.

[0099] The low-voltage sampling module 30 is installed in the battery box 10. The low-voltage sampling module 30 can be modularly configured as a whole and fixed to the side wall or bottom plate 111 of the battery box 10, or it can be divided into at least two parts for separate installation. In this embodiment, at least a portion of the low-voltage sampling module 30 is arranged in the width direction of the battery device 100 (i.e.,...). Figure 2 The low-voltage sampling module 30 can be positioned on one side of the battery cell assembly 20 along the width direction (X). Specifically, the entire low-voltage sampling module 30 can be positioned on one side of the battery cell assembly 20 along the width direction; alternatively, the low-voltage sampling module 30 can be divided into at least two modules, with at least a portion of these modules positioned on one side of the battery cell assembly 20 along the first direction (X). For example, the low-voltage sampling module 30 includes a first sampling module 301 and a second sampling module 302. The first sampling module 301 and the second sampling module 302 can be positioned on the same side of the battery cell assembly 20 along the first direction (X), or respectively on opposite sides of the battery cell assembly 20 along the first direction (X); or, one of the first sampling module 301 and the second sampling module 302 can be positioned on one side of the battery cell assembly 20 along the first direction (X), and the other can be positioned along the length direction of the battery device 100 (i.e.,...). Figure 2 The second direction (Y) on one side.

[0100] This configuration can reduce the space occupied by the low-voltage sampling module 30 in the length direction of the battery device 100, allowing the battery cell assembly 20 to stack more battery cells in the length direction of the battery device 100, thereby increasing the number of battery cells in the battery device 100.

[0101] Please refer to Figure 2In one embodiment, the low-voltage sampling module 30 includes a first sampling module 301 and a second sampling module 302, which are located on different sides of the battery cell assembly 20; at least one of the first sampling module 301 and the second sampling module 302 is located on the side of the battery cell assembly 20 along the first direction X.

[0102] In this embodiment, the low-voltage sampling module 30 includes a first sampling module 301 and a second sampling module 302. Both the first sampling module 301 and the second sampling module 302 can be used to collect information such as voltage and temperature of the battery cell assembly 20. Alternatively, the first sampling module 301 and the second sampling module 302 can collect different parameter information of the battery cell assembly 20. For example, the first sampling module 301 can be configured to collect either temperature or voltage information of the battery cell assembly 20, and the second sampling module 302 can be configured to collect the other. Alternatively, the second sampling module 302 can be configured to collect both temperature and voltage information of the battery cell assembly 20. In some embodiments, the first sampling module 301 can be configured to collect both temperature and voltage information of the battery cell assembly 20, while the second sampling module 302 can be configured to perform at least one function, such as processing the collected signals and interacting with the battery management system.

[0103] In this embodiment, one of the first sampling module 301 and the second sampling module 302 is disposed on one side of the battery cell assembly 20 along the width direction of the battery device 100, and the other is disposed on one side of the battery cell assembly 20 along the length direction of the battery device 100 (i.e., the second direction Y in the figure). Alternatively, both the first sampling module 301 and the second sampling module 302 can be disposed on the side of the battery cell assembly 20 along the width direction of the battery device 100. For example, the first sampling module 301 and the second sampling module 302 can be disposed on the same side of the battery cell assembly 20 along the first direction X, or they can be disposed on opposite sides of the battery cell assembly 20 along the first direction X. By adopting the above methods, the space occupied by the low-voltage sampling module 30 in the length direction of the battery device 100 can be reduced, thereby allowing more battery cells to be stacked in the length direction of the battery device 100, thus increasing the capacity of the battery device 100.

[0104] Please refer to Figure 2 and Figure 3 In one embodiment, along the first direction X, the first sampling module 301 and the second sampling module 302 are located on both sides of the battery cell assembly 20, respectively.

[0105] In this embodiment, the first sampling module 301 and the second sampling module 302 are both disposed in the width direction of the battery device 100 and located on both sides of the battery cell assembly 20, respectively. This makes full use of the space in the width direction of the battery box 10 and effectively reduces the space occupied by the low-voltage sampling module 30 in the length direction of the battery device 100, allowing the number of battery cells in the battery cell assembly 20 to be effectively increased. Furthermore, both the first sampling module 301 and the second sampling module 302 have sufficient installation space, avoiding mutual interference during disassembly and assembly. At this time, the space on both side walls in the width direction of the battery box 10 can be used for the arrangement of the low-voltage connection harness 40, maximizing the utilization of the internal space of the battery box 10.

[0106] In one embodiment, the first sampling module 301 is configured as a temperature sampling module. In this embodiment, the first sampling module 301 is used to collect and process the temperature information of the battery cell assembly 20; the second sampling module 302 can also be configured to collect the temperature signal of the battery cell assembly 20. In some embodiments, the second sampling module can be configured to collect the voltage signal of the battery cell assembly 20, or to collect the temperature and voltage signals of the battery cell assembly 20, etc., and of course, it can also be configured to collect other signals.

[0107] In one embodiment, the second sampling module 302 is configured as a voltage sampling module. In this embodiment, the second sampling module 302 is used to collect and process the voltage information of the battery cell assembly 20; the first sampling module 301 can also be configured to collect the voltage signal of the battery cell assembly 20. In some embodiments, the second sampling module can be configured to collect the temperature signal of the battery cell assembly 20, or to collect the temperature and voltage signals of the battery cell assembly 20, etc., and of course, it can also be configured to collect other signals.

[0108] By independently configuring at least one of the voltage sampling module and the temperature sampling module, targeted maintenance can be performed when the signal acquisition module fails, improving maintenance convenience and reducing mutual interference between the temperature sampling signal and the voltage sampling signal.

[0109] Please refer to Figure 4 and Figure 5 In one embodiment, the battery device 100 further includes a first adhesive barrier structure 13, which is disposed on the bottom wall of the receiving cavity 114 and extends along the edge of the battery cell assembly 20. The first adhesive barrier structure 13 is located in the area between the battery cell assembly 20 and the low-voltage sampling module 30.

[0110] In this embodiment, the battery cell assembly 20 is at least bonded and fixed in the battery box 10. Through the provision of the first adhesive-blocking structure 13, during the process of injecting adhesive into the battery box 10 to bond and fix the battery cell assembly 20 to the receiving cavity 114, the adhesive can be blocked by the first adhesive-blocking structure 13, preventing it from flowing to the installation area of ​​the low-voltage sampling module 30 and avoiding adhesive contamination of the low-voltage sampling module 30, thereby preventing any impact on the assembly and disassembly of the low-voltage sampling module 30. Simultaneously, the provision of the first adhesive-blocking structure 13 allows adhesive to be injected within its height range, enabling the battery cell assembly 20 to also bond with the first adhesive-blocking structure 13. This improves the connection strength and stability of the battery cell assembly 20 installed in the battery box 10, reduces the risk of the battery cell assembly 20 detaching, and is beneficial for improving the overall main frequency of the module.

[0111] Optionally, the first adhesive barrier structure 13 and the battery box 10 can be made of the same material or different materials. For example, the battery box 10 is usually made of metal such as aluminum, while the first adhesive barrier structure 13 can be made of plastic or metal. No limitation is made here.

[0112] Optionally, the first adhesive barrier structure 13 can be connected to the battery box 10 by means of bonding, welding, bolting, etc. In this case, the battery cell assembly 20 can be connected to the first adhesive barrier structure 13 to indirectly connect to the battery box 10, or the battery cell assembly 20 can be bonded to both the first adhesive barrier structure 13 and the battery box 10 simultaneously. In some embodiments, the first adhesive barrier structure 13 can also be integrally formed with the base plate 111 of the battery box 10.

[0113] Please refer to Figure 6 and Figure 7 In one embodiment, the battery box 10 includes a bottom plate 111 for forming the bottom wall of the receiving cavity 114, and a first adhesive barrier structure 13 is integrally formed with the bottom plate 111.

[0114] In this embodiment, the first baffle structure 13 and the base plate 111 can be integrally formed by extrusion molding, injection molding, or machining directly onto the blank. The specific manufacturing method is not limited here. This arrangement improves the ease of manufacturing the battery box 10 and the first baffle structure 13, reducing assembly steps. Furthermore, the first baffle structure 13 and the battery box 10 have high connection strength. Simultaneously, the first baffle structure 13 is also part of the battery box 10, resulting in high structural strength, good verticality, and resistance to deformation. This eliminates the need to straighten the first baffle structure 13 during battery cell assembly 20 installation, improving installation convenience. It also increases the direct connection area between the battery cell assembly 20 and the battery box 10, enhancing the connection strength and overall structural stability.

[0115] Please refer to Figure 8 In one embodiment, the battery box 10 includes a bottom plate 111, two first side plates 112 disposed opposite to each other along a first direction X, and two second side plates 113 disposed opposite to each other along a second direction Y. The bottom plate 111 and at least one first side plate 112 are integrally formed.

[0116] In this embodiment, the battery box 10 includes a base plate 111, two first side plates 112 arranged opposite each other along the width direction of the battery device 100, and two second side plates 113 arranged opposite each other along the length direction of the battery device 100. The base plate 111, the two first side plates 112, and the two second side plates 113 enclose a receiving cavity 114. A first baffle structure 13 is disposed in the area between the first side plate 112 and the battery cell assembly 20. The low-voltage sampling module 30 can be installed on the first side plate 112 or on the base plate 111, and is located between the first side plate 112 and the first baffle structure 13. At least one first side plate 112 and the base plate 111 can be integrally formed by extrusion molding, injection molding, bending, stamping, or other processes. Alternatively, the base plate 111 and the first side plate 112 can be directly machined from the blank by machining. The specific manufacturing method is not limited. Optionally, one of the first side plates 112 and the base plate 111 can be integrally formed, or both first side plates 112 can be integrally formed with the base plate 111. Using the above methods, the battery box 10 is easier to manufacture, which helps improve production efficiency; and it can also improve the structural strength of the battery box 10.

[0117] In some embodiments, the first side plate 112, the bottom plate 111, and the first adhesive-blocking structure 13 can be integrally formed, thereby further improving the ease of preparation and the overall structural strength.

[0118] Optionally, the second side plate 113 can be connected to the first side plate 112 and the bottom plate 111 by at least one method such as welding, bolting, or snap-fitting; in addition, when the battery box 10 is manufactured by injection molding, machining blank forming, or other methods, the second side plate 113, the first side plate 112, and the bottom plate 111 of the battery box 10 can be integrally formed.

[0119] Optionally, the end of the first adhesive-blocking structure 13 can abut against the second side plate 113, so that the first adhesive-blocking structure 13, the two second side plates 113, and the first side plate 112 form the mounting area of ​​the battery cell assembly 20; or two first adhesive-blocking structures 13 are arranged side by side, so that the two first adhesive-blocking structures 13 and the two second side plates 113 form the mounting area of ​​the battery cell assembly 20. In this way, the battery cell assembly 20 can be limited, and the adhesive can be confined in the mounting area without overflowing.

[0120] Alternatively, the second adhesive barrier structure 14 can be provided in the following embodiments. For example, two first adhesive barrier structures 13 and two second adhesive barrier structures 14 can be used to enclose and form the installation area of ​​the battery cell assembly 20; or two first adhesive barrier structures 13, two second adhesive barrier structures 14, and a second side plate 113 can be used to enclose and form the installation area of ​​the battery cell assembly 20; or two second adhesive barrier structures 14, one first adhesive barrier structure 13, and a first side plate 112 can be used to enclose and form the installation area; or a first adhesive barrier structure 13, a second adhesive barrier structure 14, a first side plate 112, and a second side plate 113 can be used to enclose and form the installation area of ​​the battery cell assembly 20. All of the above methods can form an installation area for limiting the installation of the battery cell assembly 20 and preventing adhesive overflow.

[0121] Please refer to Figure 4 and Figure 8 In one embodiment, the battery device 100 further includes a second adhesive barrier structure 14, which is disposed on the bottom wall of the receiving cavity 114. The second adhesive barrier structure 14 is located on one side of the battery cell assembly 20 along the second direction Y and extends along the edge of the battery cell assembly 20. The second direction Y intersects with the first direction X.

[0122] In this embodiment, a second adhesive-blocking structure 14 is provided on the bottom wall of the receiving cavity 114. The second adhesive-blocking structure 14 extends along the width direction of the battery device 100 and is located on the side of the battery cell assembly 20 along the second direction Y. The second adhesive-blocking structure 14 can be integrally formed with the bottom plate 111 of the battery box 10, or it can be installed in the battery box 10 by welding, bolting, or other methods. With this arrangement, during the process of injecting adhesive into the battery box 10 to bond and fix the battery cell assembly 20 to the receiving cavity 114, the adhesive can be blocked by the second adhesive-blocking structure 14, preventing the adhesive from flowing to the side of the battery cell assembly 20 along the second direction Y, thereby reducing the impact on the devices arranged in that area. Furthermore, the second adhesive-blocking structure 14 can also limit and position the battery cell assembly 20, ensuring accurate installation. In addition, the second adhesive-blocking structure 14 can also act as a reinforcing rib to improve the structural strength of the battery box 10.

[0123] Optionally, the second baffle structure 14 can be extended to abut against the first side plate 112, which helps to improve the overall structural strength of the battery box 10.

[0124] Please refer to Figure 4 and Figure 8 In one embodiment, the side wall of the battery box 10 is provided with an installation port 115 communicating with the receiving cavity 114, and the low-voltage sampling module 30 is detachably installed in the installation port 115.

[0125] In this embodiment, a mounting port 115 is provided on the side wall of the battery box 10, connecting the receiving cavity 114 and the external environment. The low-voltage sampling module 30 is installed at the mounting port 115 and detachably connected to the battery box 10 shell. This configuration allows the low-voltage sampling module 30 to be directly installed and removed from the outside of the battery box 10. When maintenance is required, the low-voltage sampling module 30 can be removed from the mounting port 115 without opening the battery box 10 cover 12, improving the ease of maintenance. This configuration also facilitates maintenance of the low-voltage sampling module 30 in environments where opening the cover 12 is inconvenient. For example, when the battery device 100 is obstructed by other devices above it; or when multiple battery devices 100 are stacked vertically to provide the required voltage and capacity in systems such as rail transit, allowing the low-voltage sampling module 30 to be installed and removed from the side of the battery box 10 eliminates the need to remove multiple battery devices 100 sequentially, further improving maintenance convenience.

[0126] Please refer to Figure 4 and Figure 5In one embodiment, the low-pressure sampling module 30 includes a connecting bracket 31 and a module body 32. The connecting bracket 31 is disposed on the outside of the receiving cavity 114 and mounted on the mounting port 115, and is detachably connected to the battery box 10. The module body 32 is disposed on the surface of the connecting bracket 31 facing the receiving cavity 114.

[0127] In this embodiment, the connecting bracket 31 can be mounted on the mounting opening 115 from the outside of the battery box 10. The connecting bracket 31 can cover the mounting opening 115, ensuring the airtightness of the battery box 10 and reducing the risk of foreign objects entering the receiving cavity 114. The connecting bracket 31 and the outer wall of the battery box 10 can also act as a limit, preventing the low-voltage sampling module 30 from excessively extending into the receiving cavity 114. Simultaneously, it also helps to increase the connection area between the low-voltage sampling module 30 and the battery box 10, thereby improving the connection strength.

[0128] Optionally, the connecting bracket 31 and the battery box 10 can be connected by at least one method, including but not limited to bolt connection and snap-fit; the module body 32 and the connecting bracket 31 can be connected and fixed by at least one method, including but not limited to adhesive connection, bolt connection and snap-fit.

[0129] Optionally, the module body 32 may include a housing and electronic components housed within the housing. The housing and the connecting bracket 31 enclose an installation space, where the electronic components are housed. Connection ports can be provided on the housing for electrical connection to the electronic components, facilitating the connection of external wiring harnesses. The housing and the connecting bracket 31 are detachably connected, for example, by bolts or clips, to facilitate separation of the housing and the connecting bracket 31 for inspection, maintenance, or replacement of the electronic components within the installation space.

[0130] Please refer to Figure 7 In one embodiment, the connecting bracket 31 includes a connecting portion 311 and a protrusion 312. The connecting portion 311 is arranged around the circumference of the mounting opening 115. The connecting portion 311 covers the outer wall of the battery box 10 and is detachably connected to the battery box 10. The protrusion 312 protrudes towards the receiving cavity 114 relative to the connecting portion 311. The module body 32 is disposed on the surface of the protrusion 312 facing the receiving cavity 114.

[0131] In this embodiment, with the connecting bracket 31 covering the mounting opening 115, the connecting portion 311 is positioned opposite to the outer wall of the battery box 10 and connected to the battery box 10. The protrusion 312 can be located in the mounting opening 115. The protrusion 312 cooperates with the side wall of the battery box 10 at the edge of the mounting opening 115 to form a protective structure. In the event of a fire inside the battery device 100, it can prevent the flame from spreading outward along the mounting opening 115 and can prevent the flame from directly contacting the external components of the receiving cavity 114. For example, it can prevent the flame from directly contacting the seal between the connecting portion 311 and the outer wall of the battery box 10, thereby reducing the risk of fire in the external components of the receiving cavity 114.

[0132] Please refer to Figure 7 In one embodiment, the sidewall where the protrusion 312 connects to the connecting portion 311 is inclined or bent in a direction away from the connecting portion 311.

[0133] In this configuration, the cross-sectional size of the protrusion 312 gradually decreases along the direction close to the receiving cavity 114, so that when the protrusion 312 is inserted into the mounting port 115 for installation, it will not interfere with the edge of the mounting port 115. It also allows the connecting part 311 to be installed close to the outer wall of the battery box 10, avoiding the problem of unstable installation due to installation gaps. In addition, it also ensures that the protrusion 312 and the side wall of the battery box 10 at the edge of the mounting port 115 can form a better protective structure, which plays a better role in fire prevention.

[0134] Please refer to Figures 2 to 5 In one embodiment, the battery device 100 further includes a low-voltage connection harness 40, which extends along the side wall of the battery box 10, and the low-voltage sampling module 30 is electrically connected to the battery cell assembly 20 through the low-voltage sampling harness.

[0135] In this embodiment, the low-voltage connection harness 40 can be used to connect the battery cell assembly 20 and the low-voltage sampling module 30 for signal and energy transmission, enabling the sampling signal to be transmitted to the low-voltage sampling module 30. The arrangement of the low-voltage connection harness 40 utilizes the space on the side wall of the battery box 10, maximizing the use of the internal space of the battery box 10.

[0136] Please refer to Figure 2 and Figure 3 In one embodiment, the low-voltage connection harness 40 includes a first harness 41, a second harness 42, and a third harness 43. The first harness 41 is fixed to the side wall of the battery box 10. The second harness 42 extends from the first branch point of the first harness 41 toward the battery cell assembly 20 and is electrically connected to the battery cell assembly 20. The third harness 43 extends from the second branch point of the first harness 41 toward the low-voltage sampling module 30 and is electrically connected to the low-voltage sampling module 30. The length of the third harness 43 is greater than the distance between the second branch point and the low-voltage sampling module 30.

[0137] In this embodiment, the first wire harness 41, the second wire harness 42, and the third wire harness 43 can be different structures on the same cable, with both ends of the first wire harness 41 connected to the second wire harness 42 and the third wire harness 43, respectively. In some embodiments, a protective sleeve or bundling structure can be used to cover or bundle multiple cables together to form the first wire harness 41, with one end of one cable detaching from the first branch point of the bundled first wire harness 41 and extending outward to form the second wire harness 42, and the other end of the cable detaching from the second branch point of the bundled first wire harness 41 and extending outward to form the third wire harness 43. The second wire harness 42 and the third wire harness 43 correspond to each other and are electrically connected to the battery cell assembly 20 and the low-voltage sampling module 30, respectively. When the battery cell assembly 20 and the low-voltage sampling wire harness are provided with multiple corresponding connection ports, multiple cables can extend outward from the first wire harness 41 to form the second wire harness 42 and the third wire harness 43, respectively, to connect to the multiple connection ports.

[0138] In this embodiment, the third wire harness 43, which branches from the first wire harness 41 and extends to the low-voltage sampling module 30 in the low-voltage connection harness 40, is made relatively long. That is, the distance between the third wire harness 43 and the low-voltage sampling module 30 is redundant compared to the distance between the first wire harness 41 and the low-voltage sampling module 30. At this time, when connecting the third wire harness 43 to the low-voltage sampling module 30, the third wire harness 43 can be freely bent within a certain range to adjust the position of the third wire harness 43 and the low-voltage sampling module 30. When disassembling and assembling the low-voltage sampling module 30, it will not be excessively constrained by the third wire harness 43 and has a certain range of motion, thereby improving the convenience of disassembling and assembling the low-voltage sampling module 30.

[0139] In some embodiments, the side wall of the battery box 10 is provided with a mounting port 115 for installing the low-voltage sampling module 30. The low-voltage sampling module 30 can be removed from the mounting port 115. In this case, the third wiring harness 43 is set to be relatively long so that it will not be excessively constrained when the low-voltage sampling module 30 is installed or removed, and has a certain range of motion. The low-voltage sampling module 30 can also be pulled out when the third wiring harness 43 is connected, thereby facilitating the installation and removal of the low-voltage sampling module 30.

[0140] Optionally, the low-voltage connection harness 40 is provided with multiple second harnesses 42, and the battery cell assembly 20 is provided with multiple first connection ports. The multiple second harnesses 42 correspond one-to-one with the multiple first connection ports and are interconnected. In this configuration, the battery cell assembly 20 can be equipped with first connection ports at different sampling locations. By connecting the multiple second harnesses 42 to the multiple first connection ports one-to-one, signals can be collected from different battery cells or different locations, or different types of signals can be collected.

[0141] Optionally, the low-voltage sampling module 30 is provided with multiple second connection ports, and the low-voltage connection harness 40 is provided with multiple third harnesses 43, with each third harness 43 corresponding to and connected to one of the multiple second connection ports. With this configuration, the low-voltage sampling module 30 can receive different signals from the signal transmission channels formed by different second connection ports and third harnesses 43.

[0142] Please refer to Figure 2 and Figure 3 In one embodiment, the battery device 100 further includes a low-voltage connector 60, which is configured for electrical connection to an external device. A low-voltage connection harness 40 is electrically connected to the low-voltage connector 60. The battery device 100 typically has two corresponding low-voltage connectors 60, one as a low-voltage input connector and the other as a low-voltage output connector, corresponding to the positive and negative terminals of the low-voltage circuit. With this configuration, the battery device 100 can be electrically connected to an external device via the low-voltage connector 60 for transmitting low-voltage signals or for powering low-power devices.

[0143] In one embodiment, the low-voltage connection harness 40 is detachably connected to the low-voltage sampling module 30. This configuration allows the low-voltage sampling module 30 to be completely removed from the battery box 10 without disassembling the low-voltage connection harness 40. Specifically, one of a male and a female connector can be provided on the low-voltage connection harness 40, and the other (such as the second connection port mentioned earlier) can be provided on the low-voltage sampling module 30. The male and female connectors are plugged into each other for electrical connection, thereby achieving a detachable connection between the low-voltage sampling module 30 and the low-voltage sampling harness. In some embodiments, connection terminals, such as conductive rings, can also be provided on the low-voltage sampling module 30. These connection terminals are secured to the low-voltage sampling module 30 using bolts or similar structures to achieve electrical connection between the connection terminals and the low-voltage sampling module 30.

[0144] Please refer to Figure 5 In one embodiment, the battery device 100 further includes a high-voltage circuit module 50, which is disposed on the side wall of the battery box 10 and electrically connected to the battery cell assembly 20; the high-voltage circuit module 50 is provided with a high-voltage connector 51, which is configured to be electrically connected to an external device.

[0145] In this embodiment, the battery device 100 is provided with a high-voltage connector 51 for electrical connection with external devices. Typically, two high-voltage connectors 51 are provided, one of which is a high-voltage input connector and the other is a high-voltage output connector, corresponding to the positive and negative terminals of the high-voltage circuit. With this configuration, the battery device 100 can be electrically connected to external devices through the high-voltage connectors 51 to transmit larger currents to meet the power supply needs of high-power devices; it can also be used to charge the battery cell assembly 20.

[0146] Optionally, the high-voltage circuit module 50 and the low-voltage sampling module 30 can be disposed on the same side wall of the battery box 10. In some embodiments, the high-voltage circuit module 50 and the low-voltage sampling module 30 can also be disposed on different sides to avoid the high-voltage circuit affecting the low-voltage sampling signal; for example, the high-voltage circuit module 50 can be disposed on the side wall of the battery box 10 along the length direction of the battery device 100, or the low-voltage sampling module 30 and the high-voltage sampling module can be disposed on opposite sides of the battery module along the width direction of the battery device 100.

[0147] In one embodiment, the high-voltage circuit module 50 is provided with a high-voltage interlock circuit, and the low-voltage sampling module 30 is electrically connected to the high-voltage interlock circuit.

[0148] In this embodiment, the high-voltage interlock circuit is a protection circuit used to detect the integrity or continuity of the high-voltage circuit. It detects the on / off state of the high-voltage circuit through a low-voltage signal, so that when an abnormal disconnection of the high-voltage circuit is detected, an alarm is triggered in time and the high-voltage power supply is cut off to avoid the risk of electric shock.

[0149] In one embodiment, the high-voltage circuit module 50 includes a maintenance switch circuit breaker.

[0150] In this embodiment, the Manual Service Disconnect (MSD) is a manually controllable switching device. By setting up the MSD, the high-voltage circuit can be physically disconnected manually, ensuring that the risk of electric shock during maintenance is avoided. Furthermore, the MSD can work in conjunction with a high-voltage interlock circuit. When the high-voltage circuit is disconnected via the MSD, the high-voltage interlock function is triggered, further cutting off the high-voltage circuit.

[0151] Please refer to Figure 2 In one embodiment, the battery cell assembly 20 is configured as a battery module, and multiple battery cells are connected as an integral module via connectors.

[0152] In this embodiment, the connector can be a cable tie, a housing, or other connecting structure. By connecting and fixing multiple battery cells into a modular structure, the battery cell assembly 20 is configured as a battery module, which facilitates the management and disassembly of the battery cell assembly 20 and improves the overall structural stability.

[0153] Please refer to Figure 1 This application also proposes an electrical device including a battery device 100 as described in any of the foregoing embodiments, the specific structure of which refers to the above embodiments. By employing the battery device 100 from the foregoing embodiments of this application in the electrical device, the battery capacity of the electrical device can be increased, which is beneficial for improving battery life and voltage.

[0154] Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, 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. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0155] Since the electrical device proposed in this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0156] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized by, include: The battery box has a receiving cavity; A battery cell assembly is disposed in the receiving cavity. The battery cell assembly includes a plurality of battery cell groups arranged along a first direction, and a plurality of battery cells arranged along a second direction. The first direction and the second direction intersect. The battery cell has a first surface disposed opposite to each other in the first direction and a second surface disposed opposite to each other in the second direction. The first surface and the second surface form the sidewall of the battery cell. The surface area of ​​the second surface is greater than the surface area of ​​the first surface. as well as A low-pressure sampling module is disposed within the receiving cavity. The low-pressure sampling module is configured to collect low-pressure data of the battery cell assembly. At least a portion of the low-pressure sampling module is located on one side of the battery cell assembly in the first direction, where the first direction is the width direction of the battery device.

2. The battery device of claim 1, wherein The low-voltage sampling module includes a first sampling module and a second sampling module, which are located on different sides of the battery cell assembly. At least one of the first sampling module and the second sampling module is located on the side of the battery cell assembly along the first direction.

3. The battery device of claim 2, wherein Along the first direction, the first sampling module and the second sampling module are located on both sides of the battery cell assembly.

4. The battery device of claim 2, wherein The first sampling module is configured as a temperature sampling module; And / or, the second sampling module is configured as a voltage sampling module.

5. The battery device as defined in any one of claims 1 to 4, characterized by The battery device further includes a first adhesive barrier structure, which is disposed on the bottom wall of the receiving cavity and extends along the edge of the battery cell assembly. The first adhesive barrier structure is located in the area between the battery cell assembly and the low-voltage sampling module.

6. The battery device of claim 5, wherein The battery box includes a bottom plate for forming the bottom wall of the receiving cavity, and the first adhesive-blocking structure is integrally formed with the bottom plate; And / or, the battery box includes a base plate, two first side plates disposed opposite each other along the first direction, and two second side plates disposed opposite each other along the second direction, wherein the base plate is integrally formed with at least one of the first side plates.

7. The battery device as defined in any one of claims 1 to 4, characterized by The battery device further includes a second adhesive barrier structure, which is disposed on the bottom wall of the receiving cavity; The second adhesive barrier structure is located on one side of the battery cell assembly along the second direction and extends along the edge of the battery cell assembly, the second direction intersecting the first direction.

8. The battery device as defined in any one of claims 1 to 4, characterized by The side wall of the battery box is provided with an installation port that communicates with the receiving cavity, and the low-voltage sampling module is detachably installed in the installation port.

9. The battery device of claim 8, wherein, The low-voltage sampling module includes: A connecting bracket, which covers the mounting opening from the outside of the receiving cavity and is detachably connected to the battery box; and The module body is disposed on the surface of the connecting bracket facing the receiving cavity.

10. The battery device of claim 9, wherein, The connecting bracket includes: A connecting part is provided around the mounting opening in the circumferential direction. The connecting part covers the outer wall of the battery box and is detachably connected to the battery box. A protrusion is provided that protrudes towards the receiving cavity relative to the connecting portion, the protrusion is located in the mounting opening, and the module body is provided on the surface of the protrusion facing the receiving cavity.

11. The battery device of claim 10, wherein, The sidewall where the protrusion connects to the connecting part is inclined or bent away from the connecting part.

12. The battery device as defined in any one of claims 1 to 4, characterized by The battery device also includes a low-voltage connection harness, which extends along the side wall of the battery box, and the low-voltage sampling module is electrically connected to the battery cell assembly through the low-voltage connection harness.

13. The battery device of claim 12, wherein, The low-voltage connection harness includes a first harness, a second harness, and a third harness. The first harness is fixed to the side wall of the battery box. The second harness extends from the first branch point of the first harness toward the battery cell assembly and is electrically connected to the battery cell assembly. The third wiring harness extends from the second branch point of the first wiring harness toward the low-voltage sampling module and is electrically connected to the low-voltage sampling module. The length of the third wiring harness is greater than the distance between the second branch point and the low-voltage sampling module.

14. The battery device of claim 12, wherein, The battery device also includes a low-voltage connector, which is configured for electrical connection to an external device, and the low-voltage connection harness is electrically connected to the low-voltage connector. And / or, the low-voltage connection harness is detachably connected to the low-voltage sampling module.

15. The battery device as defined in any one of claims 1 to 4, characterized by The battery device also includes a high-voltage circuit module, which is located in the receiving cavity and electrically connected to the battery cell assembly. The high-voltage circuit module is equipped with a high-voltage connector, which is configured for electrical connection with external equipment.

16. The battery device of claim 15, wherein, The high-voltage circuit module is equipped with a high-voltage interlock circuit, and the low-voltage sampling module is electrically connected to the high-voltage interlock circuit. And / or, the high-voltage circuit module includes a maintenance switch circuit breaker.

17. The battery device as defined in any one of claims 1 to 4, characterized by The battery cell assembly is configured as a battery module, and multiple battery cells are connected together as an integral module via connectors.

18. An electrical device, comprising: Includes the battery device as described in any one of claims 1 to 17.

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