Battery devices and power devices

Abstract

The present application discloses a battery device and an electric device, wherein the battery device comprises a plurality of battery cells, a box and a connection assembly, wherein the plurality of battery cells are arranged in sequence along the first direction thereof; the box is used to accommodate the battery cells; the connection assembly is arranged at one end of the plurality of battery cells in the second direction, the connection assembly comprises a connector, a lock attachment and a protective member, the two ends of the connector respectively extend along the first direction of the battery cells, and the two ends of the connector are connected to the box through the lock attachment; the protective member is fixed to the connector, the protective member is formed with an insulating protective part, and the insulating protective part cover is arranged outside the lock attachment; wherein an accommodation space for limiting the deformation of the battery cells is formed between the box and the connection assembly, and the first direction and the second direction are arranged to intersect. The present application improves the reliability of the battery cells.

Description

Technical Field

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

[0002] In recent years, with the rapid development of new energy technology, new energy vehicles have been used more and more widely, gradually replacing traditional fuel vehicles and becoming one of the mainstream means of transportation. As the power source of new energy vehicles, power batteries are one of the core devices of new energy vehicles. Therefore, the safety performance of power batteries has become the focus of people's attention.

[0003] In the development of battery technology, how to improve the reliability of battery devices is a research direction in battery technology. Utility Model Content

[0004] The embodiments of the present application provide a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] In the first aspect, an embodiment of the present application provides a battery device, which includes a plurality of battery cells, a case and a connecting assembly, wherein the plurality of battery cells are arranged in sequence along a first direction thereof; the case is used to accommodate the battery cells; the connecting assembly is disposed at one end of the plurality of battery cells along a second direction, the connecting assembly includes a connecting piece, a locking accessory and a protective piece, wherein both ends of the connecting piece extend along the first direction of the battery cells respectively, and both ends of the connecting piece are connected to the case through the locking accessory; the protective piece is fixed to the connecting piece, and the protective piece is formed with an insulating protective portion, and the insulating protective portion cover is disposed on the outside of the locking accessory; wherein an accommodating space for limiting deformation of the battery cells is formed between the case and the connecting assembly, and the first direction is arranged to intersect with the second direction.

[0006] In the above scheme, the connector is locked to the box body by a locking accessory to limit the deformation of the battery cell, and the insulating protective cover of the protective member is also arranged on the outside of the locking accessory. If the electrolyte leaks, it can prevent the electrolyte from contacting the locking accessory to a certain extent, reducing the probability of short circuit, thereby improving the reliability of the battery device.

[0007] In some embodiments, the battery cells are placed upside down in the box. The embodiments of the present application have a more obvious effect on the scenario where the battery cells are placed upside down in the box.

[0008] In some embodiments, a drainage groove is further formed on a side of the protective member away from the battery cell, and the drainage groove is provided with a drainage port for liquid to flow out.

[0009] In the above solution, the drainage groove can drain the leaked electrolyte to the drainage port for discharge, further improving the reliability of the battery device.

[0010] In some embodiments, the drainage groove is arranged around the outer periphery of the insulating protective part. The drainage groove can provide an extra layer of protection for the outer side of the insulating protective part, further reducing the probability of contact between the electrolyte and the lock accessories.

[0011] In some embodiments, the drainage port is disposed on a side of the drainage groove away from the battery cell, so that the electrolyte can flow out from the side away from the battery cell, further reducing the short circuit phenomenon.

[0012] In some embodiments, the insulating protective portion includes a bottom portion and a side portion, which is disposed on one side of the end portion of the locking accessory; the side portion is connected to the bottom portion, and the side portion is disposed on a peripheral side of the locking accessory.

[0013] In the above solution, the end and the surrounding side of the locking member can be better protected by combining the bottom and the side, thereby further improving the reliability of the battery cell.

[0014] To a certain extent, a notch is provided at one end of the side portion along the first direction, and the notch faces a side away from the battery cell.

[0015] In the above scheme, by protecting the side close to the battery cell and setting a gap on the side away from the battery cell, even if electrolyte enters the insulating protection part through the gap, the probability of conducting current is low due to the increased creepage distance. The embodiment of the present application can save materials by setting the gap, facilitate process molding, and reduce costs.

[0016] In some embodiments, the side portion is disposed around the periphery of the locking accessory, and can limit the entry of electrolyte from a 360-degree direction around the periphery of the locking accessory, thereby further improving the reliability of the battery device.

[0017] In some embodiments, the connection assembly further includes a buffer member, which is disposed on a side of the connection member away from the battery cell, and two ends of the buffer member extend along a first direction of the battery cell respectively.

[0018] In the above solution, the buffer member can provide buffering force, thereby protecting the battery cell.

[0019] In some embodiments, the protective member is provided with a recessed portion recessed toward the battery cell, and an end portion of the buffer member is accommodated in the recessed portion.

[0020] In the above solution, by accommodating the end of the buffer member in the recess, the space inside the battery device can be saved, thereby improving the energy density of the battery.

[0021] In some embodiments, the side of the recess facing the battery cell is fixed to the connector, thereby improving the overall strength of the protection assembly.

[0022] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery device according to any of the above embodiments, and the battery device is used to provide electrical energy.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0026] Figure 2 An exploded view of a battery device according to some embodiments of the present application;

[0027] Figure 3 A schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0028] Figure 4 is a partial schematic diagram of a battery device according to some embodiments of the present application;

[0029] Figure 5 is a schematic diagram of the structure of the connection components of some embodiments of the present application;

[0030] Figure 6 yes Figure 5 A partial schematic diagram of

[0031] Figure 7 is a partial schematic diagram of a connection assembly when a battery cell of some embodiments of the present application is inverted;

[0032] Figure 8 is a schematic diagram of the structure of the protective element of some embodiments of the present application;

[0033] Fig. 9 It is a partial schematic diagram of the connection components when the battery cells of other embodiments of the present application are inverted.

[0034] Description of reference numerals:

[0035] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, bottom guard plate; 30, box body; 31, crossbeam; 400, battery module; 20, battery cell; 22, shell; 21, end cover; 23, electrode assembly; 26, electrode terminal; 24, conduit component; 25, injection hole; 50, connecting assembly; 51, connecting piece; 52, locking accessory; 53, protective piece; 531, recess; 54, insulating protective part; 541, bottom; 542, side; 543, notch; 55, pressure strip; 56, insulating film; 57, drainage groove; 571, drainage port; 58, buffer; X, second direction; Y, first direction. DETAILED DESCRIPTION

[0036] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0037] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0038] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0039] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In the present application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0041] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0042] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0043] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0044] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0045] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0046] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0047] In a battery device, in order to ensure the structural stability of the battery device as much as possible, multiple battery cells are usually stacked in sequence. During the operation of the battery cell, as the temperature rises, the pole piece will expand. In order to prevent the above situation from happening and improve the reliability of the battery cell operation process, the battery cell is currently connected to the box through a connecting component to limit the deformation of the battery cell. However, if the electrolyte of the battery cell leaks and overflows to certain parts of the connecting component, it may be short-circuited, resulting in thermal runaway, which reduces the reliability of the battery device.

[0048] In order to solve the above-mentioned technical problems, an embodiment of the present application provides a battery device, which includes a plurality of battery cells, a box body and a connecting assembly, wherein the plurality of battery cells are arranged in sequence along their own first direction; the box body is used to accommodate the battery cells; the connecting assembly is arranged at one end of the plurality of battery cells in the second direction, the connecting assembly includes a connecting piece, a locking accessory and a protective piece, the two ends of the connecting piece extend respectively along the first direction of the battery cells, and the two ends of the connecting piece are connected to the box body through the locking accessory; the protective piece is fixed to the connecting piece, and the protective piece is formed with an insulating protective part, and the insulating protective part cover is arranged on the outside of the locking accessory; wherein a accommodating space for limiting deformation of the battery cells is formed between the box body and the connecting assembly, and the first direction and the second direction are arranged to intersect.

[0049] In the above scheme, the connector is locked to the box body by a locking accessory to limit the deformation of the battery cell, and the insulating protective cover of the protective member is also arranged on the outside of the locking accessory. If the electrolyte leaks, it can prevent the electrolyte from contacting the locking accessory to a certain extent, reducing the probability of short circuit, thereby improving the reliability of the battery device.

[0050] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0051] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0052] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0053] Please refer to Figure 2 , Figure 2 An exploded view of a device provided for some embodiments of the present application. The battery device 100 includes a battery case and a battery cell 20. In some embodiments, the battery case may include a bottom guard plate 10 and a case 30, the bottom guard plate 10 and the case 30 cover each other, and the bottom guard plate 10 and the case 30 jointly define a receiving cavity for accommodating the battery cell 20. The case 30 may be a hollow structure with one end open, the bottom guard plate 10 may be a plate-like structure, the bottom guard plate 10 covers the open side of the case 30, so that the bottom guard plate 10 and the case 30 jointly define a receiving cavity; the bottom guard plate 10 and the case 30 may also be hollow structures with one side open, and the open side of the bottom guard plate 10 covers the open side of the case 30. Of course, the battery case formed by the bottom guard plate 10 and the case 30 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0054] In the battery device 100, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box; of course, the battery device 100 can also be in the form of multiple battery cells 20 first connected in series, in parallel, or in a mixed connection to form a battery module 400, and the multiple battery modules 400 are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0055] Each battery cell 20 may be a secondary battery cell or a primary battery cell, or a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0056] Please refer to Figure 3 , Figure 3 Schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application. A battery cell 20 refers to the smallest unit constituting a battery. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23 and other functional components.

[0057] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 26 can be provided on the end cap 21. The electrode terminal 26 can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0058] Figure 4 is a partial schematic diagram of a battery device according to some embodiments of the present application; Figure 5 is a schematic diagram of the structure of the connection components of some embodiments of the present application; Figure 6 yes Figure 5 A partial schematic diagram of .

[0059] Please refer to Figure 4-Figure 6 In a first aspect, an embodiment of the present application provides a battery device 100, which includes a plurality of battery cells 20, a box body 30 and a connecting assembly 50, wherein the plurality of battery cells 20 are arranged in sequence along a first direction Y thereof; the box body 30 is used to accommodate the battery cells 20; the connecting assembly 50 is disposed at one end of the plurality of battery cells 20 in a second direction X, the connecting assembly 50 includes a connecting member 51, a locking member 52 and a protecting member 53, both ends of the connecting member 51 extend along the first direction Y of the battery cells 20 respectively, and both ends of the connecting member 51 are connected to the box body 30 through the locking member 52; the protecting member 53 is fixed to the connecting member 51, and the protecting member 53 is formed with an insulating protecting portion 54, and the insulating protecting portion 54 is covered on the outside of the locking member 52; wherein an accommodating space for limiting deformation of the battery cells 20 is formed between the box body 30 and the connecting assembly 50, and the first direction Y is arranged to intersect with the second direction X.

[0060] The first direction Y of the battery cell 20 is the stacking direction of the pole pieces in the battery cell 20, and is also the direction with the largest deformation in the battery cell 20, and can also be the thickness direction of the battery cell 20. The second direction X is the height direction of the battery cell. The box 30 can be formed by enclosing a plurality of side panels and a bottom plate, or it can be an integral box 30 structure with an opening. The connecting assembly 50 can be arranged on the opening of the box 30. The box 30 can be made of a material with a certain strength, such as a metal material. And the inner wall of the box 30 can be arranged to fit the battery cell 20 to form a certain restraint on the battery cell 20. The battery cell 20 can be inverted in the box 30, that is, the electrode terminal 26 of the battery cell 20 and the injection hole 25 for injecting electrolyte are facing downward. A bottom guard plate 10 can be arranged at the opening of the box 30 to support the battery cell 20.

[0061] The connector 51 is usually a strip structure, and the connector 51 itself has a certain tensile strength to resist the deformation of the battery cell 20 in the first direction Y, forming a certain constraint on the battery cell 20. In addition, the volume of the connecting assembly 50 cannot be too large to ensure the energy density of the battery device 100.

[0062] The protective member 53 can be fixed to the connecting member 51 by bonding, bolts or other means. A crossbeam 31 can be provided on the box body 30, and the protective member 53 is connected to the crossbeam 31 through a locking member 52. The protective member 53 can be an integrally formed structure, and the entire protective member 53 is made of an insulating material, or the protective member 53 can also be formed by a combination of multiple parts. The insulating protective portion 54 can be a structure that bulges in the direction away from the locking member 52, which not only covers the outer periphery of the locking member 52, but also blocks the end of the locking member 52 away from the battery cell 20. Alternatively, the insulating protective portion 54 can also only cover the outer periphery of the locking member 52, without covering the end of the locking member 52 away from the battery cell 20.

[0063] Figure 7 It is a partial schematic diagram of the connection components when the battery cell of some embodiments of the present application is inverted.

[0064] The connecting member 51 can be a metal member such as a steel belt. Figure 7 As shown, a pressure strip 55 and an insulating film 56 may be provided on the outside of the connecting member 51 . The pressure strip 55 can better fix the connecting member 51 , and the insulating film 56 is coated on the outer surface of the pressure strip 55 to have an insulating effect.

[0065] The locking accessory 52 can be a bolt, a self-tapping screw or a buckle. Since the locking accessory 52 is also a metal part, if the electrolyte of the inverted battery cell 20 leaks and overflows to the locking accessory 52, it will cause the locking accessory 52 and the battery cell 20 to be connected, resulting in a short circuit.

[0066] In the above scheme, the connector 51 is locked to the box body 30 by the locking accessory 52 to limit the deformation of the battery cell 20, and the insulating protective part 54 of the protective member 53 is also covered on the outside of the locking accessory 52. ​​If the electrolyte leaks, it can prevent the electrolyte from contacting the locking accessory 52 to a certain extent, reducing the probability of short circuit, thereby improving the reliability of the battery device 100.

[0067] In some embodiments, the battery cells 20 are placed upside down in the casing 30 .

[0068] That is, the electrode terminal 26 of the battery cell 20 and the injection hole 25 for injecting electrolyte face downward. A bottom guard plate 10 may be provided at the opening of the box body 30 to support the battery cell 20. Since the inverted battery cell 20 is more likely to contact the connection assembly 50 after electrolyte leakage occurs, it is more likely to cause safety accidents such as short circuit. Therefore, the embodiment of the present application has a more obvious effect on the scene where the battery cell 20 is inverted in the box body 30.

[0069] Figure 7 It is a partial schematic diagram of the connection components when the battery cell of some embodiments of the present application is inverted.

[0070] like Figure 7 As shown, in some embodiments, a drainage groove 57 is further formed on a side of the protective member 53 away from the battery cell 20 , and the drainage groove 57 is provided with a drainage port 571 for liquid to flow out.

[0071] The drainage groove 57 may be formed by extending and bending the outer circumference of the insulating protection part 54, or the drainage groove 57 is a separate structure connected to the insulating protection part 54. The drainage groove 57 may be arranged around the outer circumference of the insulating protection part 54, or the drainage groove 57 may be arranged on one side or both sides of the insulating protection part 54. When the electrolyte of the battery cell 20 overflows to the position of the protection member 53, it will first pass through the drainage groove 57 before reaching the insulating protection part 54.

[0072] In the above solution, the drainage groove 57 can drain the leaked electrolyte to the drainage port 571 for discharge, further improving the reliability of the battery device 100 .

[0073] In some embodiments, the drainage groove 57 is arranged around the outer periphery of the insulating protection part 54 . The drainage groove 57 can provide an extra layer of protection for the outer side of the insulating protection part 54 , further reducing the probability of the electrolyte contacting the locking accessory 52 .

[0074] In some embodiments, the drainage port 571 is disposed on a side of the drainage groove 57 away from the battery cell 20 .

[0075] That is, the drainage groove 57 is arranged as close to the battery cell 20 as possible, and the drainage port 571 faces the other side. There can be one or two drainage ports 571, that is, the drainage groove 57 is a through groove with drainage ports 571 at both ends.

[0076] In the above solution, by arranging the drainage port 571 on the side of the drainage groove 57 away from the battery cell 20 , the electrolyte can flow out from the side away from the battery cell 20 , thereby further reducing the short circuit phenomenon.

[0077] Figure 8 It is a schematic diagram of the structure of the protective element of some embodiments of the present application.

[0078] like Figure 8 As shown, in some embodiments, the insulating protection portion 54 includes a bottom portion 541 and a side portion 542 , which is disposed on one side of the end of the locking accessory 52 ; the side portion 542 is connected to the bottom portion 541 , and the side portion 542 is disposed on the peripheral side of the locking accessory 52 .

[0079] When the battery cell 20 is placed upside down, the insulating protection portion 54 is located at the lower end of the locking member 52 .

[0080] The side portion 542 may surround the outer circumference of the locking accessory 52 and cover the entire circumference of the locking accessory 52 , that is, the insulating protection portion 54 is a closed structure. Alternatively, the side portion 542 may only cover a portion of the entire outer circumference of the locking accessory 52 .

[0081] In the above solution, the end and the surrounding side of the locking member can be better protected by combining the bottom 541 with the side 542 , thereby further improving the reliability of the battery cell 20 .

[0082] To a certain extent, a notch 543 is disposed at one end of the side portion 542 along the first direction Y, and the notch 543 faces a side away from the battery cell 20 .

[0083] That is, the side portion 542 of the insulating protection portion 54 is arranged as close to the battery cell 20 as possible, and the notch 543 thereof faces the other side.

[0084] In the above solution, by protecting the side close to the battery cell 20 and setting the notch 543 on the side away from the battery cell 20, even if electrolyte enters the insulating protection part 54 from the notch 543, the probability of conducting current is low due to the increased creepage distance. The embodiment of the present application can save materials, facilitate process molding, and reduce costs by setting the notch 543.

[0085] In some embodiments, the side portion 542 is disposed around the outer circumference of the locking member 52 , and can limit the entry of electrolyte from a 360-degree direction around the outer circumference of the locking member 52 , thereby further improving the reliability of the battery device 100 .

[0086] Fig. 9 FIG. 1 is a partial schematic diagram of the connection components when the battery cells of other embodiments of the present application are inverted. Fig. 9 As shown, in some embodiments, the connection assembly 50 further includes a buffer 58 , which is disposed on a side of the connection member 51 away from the battery cell 20 , and both ends of the buffer 58 extend along the first direction Y of the battery cell 20 .

[0087] The buffer member 58 may be foam or other insulating elastic bodies. The buffer member 58 may be located between the connecting member 51 and the bottom guard plate 10, and may have a buffering effect when the bottom guard plate 10 is subjected to external forces.

[0088] In the above solution, the buffer member 58 can provide a buffer force, thereby protecting the battery cell 20 .

[0089] In some embodiments, the protection member 53 is provided with a recessed portion 531 that is recessed toward the battery cell 20 , and an end portion of the buffer member 58 is received in the recessed portion 531 .

[0090] The shape and size of the recess 531 may match the end of the buffer 58. The end of the buffer 58 may be fixed to the recess 531 by bonding.

[0091] In the above solution, the recess 531 accommodates the end of the buffer 58 , which can save space inside the battery device 100 , thereby improving the battery energy density.

[0092] In some embodiments, the side of the recess 531 facing the battery cell 20 is fixed to the connector 51. In other words, the side of the recess 531 facing away from the buffer 58 is fixed to the connector 51, which can be fixed by bonding or snapping, etc., which improves the overall strength of the protective assembly.

[0093] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery device 100 according to any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0094] According to some embodiments of the present application, the present application provides a battery device 100, which includes a plurality of battery cells 20, a box body 30 and a connecting assembly 50, wherein the plurality of battery cells 20 are arranged in sequence along their own first direction Y; the box body 30 is used to accommodate the battery cells 20; the connecting assembly 50 is arranged at one end of the plurality of battery cells 20 in the second direction X, the connecting assembly 50 includes a connecting member 51, a locking member 52 and a protective member 53, both ends of the connecting member 51 extend along the first direction Y of the battery cells 20 respectively, and both ends of the connecting member 51 are connected to the box body 30 through the locking member 52; the protective member 53 is fixed to the connecting member 51, and the protective member 53 is formed with an insulating protective portion 54, and the insulating protective portion 54 is covered on the outside of the locking member 52; wherein an accommodating space for limiting deformation of the battery cells 20 is formed between the box body 30 and the connecting assembly 50, and the first direction Y is arranged to intersect with the second direction X. The protective member 53 is further formed with a drainage groove 57 on the outer side of the insulating protective portion 54 , and the drainage groove 57 is provided with a drainage port 571 for liquid to flow out.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are arranged in sequence along a first direction; A box body, used for accommodating the battery monomer; A connecting assembly is provided at one end of the plurality of battery cells along the second direction, the connecting assembly comprises a connecting member, a locking member and a protecting member, both ends of the connecting member extend along the first direction of the battery cells respectively, and both ends of the connecting member are connected to the box body through the locking member; the protecting member is fixed to the connecting member, and the protecting member is formed with an insulating protecting portion, and the insulating protecting portion cover is provided outside the locking member; Wherein, an accommodation space for limiting deformation of the battery cell is formed between the box body and the connecting assembly, and the first direction and the second direction are arranged to intersect.

2. The battery device according to claim 1, characterized in that: The battery cells are placed upside down in the box.

3. The battery device according to claim 1, characterized in that: A drainage groove is further formed on a side of the protective member away from the battery cell, and the drainage groove is provided with a drainage port for liquid to flow out.

4. The battery device according to claim 3, characterized in that: The drainage groove is arranged around the outer circumference of the insulating protection part.

5. The battery device according to claim 3, characterized in that: The drainage port is arranged on a side of the drainage groove away from the battery cell.

6. The battery device according to claim 1, characterized in that: The insulating protection part comprises: A bottom portion, arranged at one side of the end portion of the locking accessory; The side portion is connected to the bottom portion, and the side portion is arranged on the peripheral side of the locking accessory.

7. The battery device according to claim 6, characterized in that: A notch is disposed at one end of the side portion along the first direction, and the notch faces a side away from the battery cell.

8. The battery device according to claim 6, characterized in that: The side portion is arranged in a surrounding manner along the outer circumference of the locking accessory.

9. The battery device according to claim 1, characterized in that: The connection assembly further includes a buffer member, which is disposed on a side of the connection member away from the battery cell, and two ends of the buffer member extend along a first direction of the battery cell respectively.

10. The battery device according to claim 9, characterized in that: The protection member is provided with a recessed portion recessed toward the battery cell, and an end portion of the buffer member is accommodated in the recessed portion.

11. The battery device according to claim 10, characterized in that: The side of the recess facing the battery cell is fixed to the connecting member.

12. An electrical device, characterized in that: The invention comprises a battery device according to any one of claims 1 to 11, wherein the battery device is used to provide electrical energy.

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