Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises an end plate, a cooling structure, a depression bar and a plurality of battery monomers, and the plurality of battery monomers are arranged side by side at least along a first direction; the end plate is positioned on one side of the plurality of single batteries along the first direction and is connected with the adjacent single batteries; the cooling structure comprises a first water-cooling plate and a second water-cooling plate, the first water-cooling plate is positioned on one side of the plurality of single batteries along the second direction, and the second water-cooling plate is positioned on one side of the plurality of single batteries along the third direction; the pressing strips are located on the sides, away from the second water cooling plate, of the battery monomers and extend in the first direction, one ends of the pressing strips are connected with the end plates, and every two of the first direction, the second direction and the third direction intersect. According to the technical scheme, the structural strength of the battery device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In order to meet the energy demand of electrical devices, the volume of the battery device is usually increased. However, the structural strength of the battery device is limited. If the volume of the battery device is too large, the structural strength will be difficult to meet the mechanical performance requirements. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery device and an electric device, aiming at improving the structural strength of the battery device.

[0005] To achieve the above-mentioned purpose, the battery device proposed by the utility model comprises:

[0006] A plurality of battery cells, wherein the plurality of battery cells are arranged side by side at least along a first direction;

[0007] an end plate, the end plate being located on one side of the plurality of battery cells along the first direction and connected to adjacent battery cells;

[0008] a cooling structure, the cooling structure comprising a first water-cooling plate and a second water-cooling plate, the first water-cooling plate being located on one side of the plurality of battery cells along the second direction, and the second water-cooling plate being located on one side of the plurality of battery cells along the third direction; and

[0009] A pressure strip is located on a side of the battery cell away from the second water-cooling plate and extends along the first direction. One end of the pressure strip is connected to the end plate. The first direction, the second direction and the third direction intersect each other.

[0010] The present application sets a first water-cooling plate and a second water-cooling plate in the cooling structure of the battery device. Both the first water-cooling plate and the second water-cooling plate are in contact with a plurality of battery cells. The battery cells can be cooled in actual application, thereby improving the cooling capacity of the battery device and the cooling capacity of the battery device, so that the battery device can meet the heat dissipation requirements of higher-rate fast charging. The first water-cooling plate and the end plate limit the battery cells in the first direction and the second direction respectively to resist the high expansion force of the battery device during charging and discharging; the second water-cooling plate and the end plate play a supporting role for the battery cells, and the pressure strips press the battery cells in the third direction, so as to improve the structural strength and modal main frequency of the battery device, thereby facilitating the increase of the volume of the battery device, the increase of the capacity of the battery cells in the battery device, and the improvement of the energy density of the battery device.

[0011] In one embodiment, the first water-cooling plate and the second water-cooling plate are an integrated structure.

[0012] This arrangement enables the first water-cooling plate and the second water-cooling plate of the cooling structure to be integrated, reduces assembly and manufacturing processes, and increases overall structural strength.

[0013] In one embodiment, the coolant flow channel of the first water-cooling plate is connected to the coolant flow channel of the second water-cooling plate.

[0014] With this arrangement, the cooling structure may be provided with only one set of coolant interfaces (i.e., one set of liquid inlet and liquid outlet) to facilitate the cooling structure to be connected to an external cooling system, thereby improving ease of use.

[0015] In one embodiment, a partial structure of the second water-cooling plate is located on a side of the end plate away from the battery cell, and is provided with a coolant interface communicating with the coolant flow channel.

[0016] In this arrangement, the coolant interface of the cooling structure is arranged on the side of the end plate away from the battery cell, that is, outside the receiving space enclosed by the cooling structure and the end plate, so as to facilitate the connection of the cooling structure to an external cooling system.

[0017] In one embodiment, the cooling structure includes two first water-cooling plates arranged side by side along the second direction, and the plurality of battery cells are located between the two first water-cooling plates.

[0018] This arrangement can increase the contact area between the cooling structure and the battery cell, improve the cooling capacity, and enable the battery device to dissipate heat quickly, thereby meeting higher heat dissipation requirements and facilitating increasing the battery cell capacity in the battery device.

[0019] In one embodiment, the first water cooling plate is adhesively connected to the battery cell;

[0020] And / or, the second water cooling plate is adhesively connected to the battery cell.

[0021] This arrangement enables the battery cell to be connected to the cooling structure with good connection strength, improves the overall structural strength of the battery device, and is more convenient to connect.

[0022] In one embodiment, a connection ear is provided at one end of the first water-cooling plate facing the end plate. The connection ear is bent and extended toward one side of the end plate and is located at a side of the end plate away from the battery cell.

[0023] With this arrangement, when assembling the battery device, a connecting ear is bent at one end of the first water cooling plate close to the end plate, and the first water cooling plate is limitedly matched with the end plate in the first direction and the second direction through the connecting ear, which can improve the structural strength of the battery device and facilitate connection, thereby helping to reduce manufacturing costs.

[0024] In one embodiment, a card interface is provided on a side of the end plate facing away from the battery cell, and at least a portion of the structure of the connecting ear is provided on the card interface.

[0025] This arrangement allows the connecting ear to be limited in the card interface, and the connecting ear and the end plate to be limited to each other in the third direction, which is beneficial to improving the overall structural strength and stability.

[0026] In one embodiment, the battery device further comprises a connecting beam, which is disposed on a side of the second water-cooling plate facing the battery cell and extends along the second direction;

[0027] The plurality of battery cells are distributed on both sides of the connection beam along the first direction, and the connection beam is connected to adjacent battery cells.

[0028] By adopting the above method, the connecting beam can act as a reinforcing rib to improve the structural strength of the cooling structure, and the battery cells can also be connected to the connecting beam to improve the installation strength and position stability of the battery cells, which is beneficial to improving the structural strength and modal main frequency of the battery device, and is beneficial to increasing the number of battery cells in the first direction, increasing the volume of the battery device, and improving the volume energy density of the battery device.

[0029] In one embodiment, the pressure strip is connected to the connecting beam. This arrangement allows the middle area of ​​the pressure strip to be fixed, thereby increasing the locking strength of the pressure strip, allowing the pressure strip to better limit the position of the battery cell, thereby increasing the structural strength of the battery device, and allowing the battery device to meet higher mechanical performance requirements.

[0030] In one embodiment, the connecting beam is provided with a first connecting structure, and the second water-cooling plate is provided with an escape opening arranged opposite to the first connecting structure.

[0031] By adopting the above method, the connecting beam can be connected to the box of the battery device or the electrical device through the first connecting structure to improve the structural strength of the battery device, so that the cooling structure and the battery cell are not easy to loosen, so as to meet higher mechanical performance requirements.

[0032] In one embodiment, the battery device further includes a restraining member, and the restraining member is clamped on the outer sides of the first water-cooling plate and the end plate.

[0033] By adopting the above-mentioned method, the restraining parts are arranged around the outside of the module structure formed by the battery cell, the end plate and the cooling structure to improve the resistance to the expansion force of the battery device during charging and discharging, improve the structural strength, ensure the stability of the module structure, reduce the risk of deformation or displacement caused by the expansion of the battery cell, and improve the reliability of the battery device; thereby facilitating the realization of a large-size structural design of the battery device and improving the capacity and volume energy density of the battery device.

[0034] In one embodiment, the restraining member is a steel belt, which is easy to install and has high structural strength, can ensure the stability of the module structure, reduce the risk of deformation or displacement caused by battery cell expansion, and improve the reliability of the battery device.

[0035] In one embodiment, the battery device includes two end plates arranged side by side along the first direction, a plurality of battery cells are located between the two end plates, and two ends of the pressure strip are respectively connected to the two end plates in a one-to-one correspondence.

[0036] With this arrangement, the two end plates can limit the battery cells on both sides of the battery cells along the first direction, and both ends of the pressure strip are fixed, which is beneficial to improving the overall structural strength of the battery device and improving the resistance to the expansion force of the battery device.

[0037] In one embodiment, the end plate is bonded to the battery cell. In this arrangement, the end plate and the battery cell have good connection strength and are easy to connect and assemble.

[0038] In one embodiment, the battery device includes a plurality of rows of battery cells arranged side by side along the second direction.

[0039] This arrangement has high space utilization of the battery device, which is beneficial to improving the capacity and volume energy density of the battery device.

[0040] In one embodiment, the battery device further includes a box body, the battery cell, the end plate, the cooling structure and the pressure strip are accommodated in the box body, and the end plate is connected to the box body.

[0041] By adopting the above method, the battery cells, cooling structure and other components in the battery device are installed in the box, which can be used for protection and reduce the risk of damage. The battery cells, cooling structure and end plates are connected to each other to form an integral module, which can be disassembled and assembled together and connected to the box through the end plates. The boxing process is simple and has a certain degree of reworkability, reducing the difficulty of repair and replacement.

[0042] The present application also proposes an electrical device, which includes a battery device as described in any of the aforementioned embodiments.

[0043] By using the aforementioned battery device in the electrical device, due to the high structural strength and good heat dissipation performance of the battery device, a battery device with a larger volume and more battery cell capacity can be used in the electrical device, which can achieve higher rate fast charging and better battery life.

[0044] 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, which can be implemented in accordance with the contents of the specification, and to make 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

[0045] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the structure of a vehicle provided according to some embodiments of the present application;

[0047] Figure 2 A schematic diagram of the structure of a battery device provided according to some embodiments of the present application;

[0048] Figure 3 A schematic diagram of the structure of a battery device provided according to some other embodiments of the present application;

[0049] Figure 4 for Figure 3 An exploded view of the battery device;

[0050] Figure 5 An enlarged view of the junction between the first water-cooling plate and the end plate of the battery device provided in some embodiments of the present application.

[0051] Description of Figure Numbers:

[0052] 100, battery device; 10, box; 11, first part; 12, second part; 20, battery cell; 30, end plate; 31, card interface; 32, second connection structure; 40, cooling structure; 41, first water cooling plate; 411, connection ear; 42, second water cooling plate; 421, avoidance; 43, coolant interface; 50, pressure strip; 60, connection beam; 61, first connection structure; 70, restraint;

[0053] 1000, vehicle; 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction.

[0054] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0058] Reference to "embodiments" herein 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 herein may be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0064] In order to meet the energy needs of electrical devices, the volume of the battery device is usually increased, but the structural strength of the battery device is limited. If the volume of the battery device is too large, the structural strength will be difficult to meet the mechanical performance requirements. For example, during the charging and discharging process of the battery, the battery cell will expand; under the internal or external forces of the electrical device, the battery device will vibrate, which may easily lead to the risk of structural failure of the battery device. Secondly, as the capacity of the battery device increases, higher requirements are also placed on heat dissipation performance.

[0065] Based on the above considerations, in order to improve the structural strength of the battery device 100, the battery device 100 proposed in the present application includes a battery cell 20, an end plate 30, a cooling structure 40 and a pressure strip 50, and multiple battery cells 20 are arranged side by side at least along the first direction X; the end plate 30 is located on one side of the multiple battery cells 20 along the first direction X, and is connected to the adjacent battery cells 20; the cooling structure 40 includes a first water-cooling plate 41 and a second water-cooling plate 42, the first water-cooling plate 41 is located on one side of the multiple battery cells 20 along the second direction Y, and the second water-cooling plate 42 is located on one side of the multiple battery cells 20 along the third direction Z; the pressure strip 50 is located on the side of the battery cell 20 away from the second water-cooling plate 42, and is extended along the first direction X, one end of the pressure strip 50 is connected to the end plate 30, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0066] With the above-mentioned battery device 100, since the first water-cooling plate 41 and the second water-cooling plate 42 provided in the cooling structure 40 of the battery device 100 can both cool the battery cell 20, the cooling capacity of the battery device 100 is improved, so that the battery device 100 can meet the heat dissipation requirements of higher-rate fast charging. In addition, the first water-cooling plate 41 and the end plate 30 respectively limit the battery cell 20 in the first direction X and the second direction Y to resist the high expansion force of the battery device 100 during charging and discharging; the second water-cooling plate 42 and the end plate 30 play a bottom-supporting role for the battery cell 20, and the pressure strip 50 presses the battery cell 20 in the third direction Z, the structural strength and modal main frequency of the battery device 100 can be improved, which is conducive to increasing the volume of the battery device 100, increasing the capacity of the battery cell 20 in the battery device 100, and improving the energy density of the battery device 100.

[0067] The battery device 100 disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles 1000, ships or aircraft. A power supply system of the electrical device can be composed of the battery cell 20 and the battery device 100 disclosed in the present application, so that the structural strength and modal main frequency of the battery device 100 can be improved, and the performance stability of the battery device 100 can be improved.

[0068] The embodiment of the present application provides an electric device using a battery device 100 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.

[0069] 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.

[0070] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 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 is provided inside the vehicle 1000, and the battery may be provided at the bottom, head or tail of the vehicle 1000. The battery 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.

[0071] 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.

[0072] Please refer to Figure 2 , Figure 2An exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. Among them, the box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0073] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may 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 10; of course, the multiple battery cells 20 may be first connected in series, in parallel, or in a mixed connection to form a battery module, and the multiple battery modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0074] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0075] Combined with reference Figure 3 and Figure 4 , Figure 3 is a structural diagram of a battery device 100 in some embodiments of the present application, Figure 4The exploded diagram of the battery device 100 in some embodiments of the present application. The battery device 100 proposed in the present application includes a battery cell 20, an end plate 30, a cooling structure 40 and a pressure strip 50, wherein a plurality of battery cells 20 are arranged side by side at least along a first direction X; the end plate 30 is located on one side of the plurality of battery cells 20 along the first direction X and is connected to the adjacent battery cells 20; the cooling structure 40 includes a first water-cooling plate 41 and a second water-cooling plate 42, wherein the first water-cooling plate 41 is located on one side of the plurality of battery cells 20 along the second direction Y, and the second water-cooling plate 42 is located on one side of the plurality of battery cells 20 along the third direction Z; the pressure strip 50 is located on one side of the battery cell 20 away from the second water-cooling plate 42 and is extended along the first direction X, one end of the pressure strip 50 is connected to the end plate 30, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0076] As shown in the figure, the first direction X is the thickness direction of the battery cell 20, the second direction Y is the width direction of the battery cell 20, and the third direction Z is the height direction of the battery cell 20. Usually, the electrode terminal of the battery cell 20 is located at one end of the battery cell 20 along the height direction.

[0077] In the embodiment of the present application, the battery device 100 has a plurality of battery cells 20, wherein one column of battery modules may be provided in the battery device 100, or two or more columns of battery modules arranged side by side along the width direction of the battery cells 20 may be provided, and each column of battery modules includes a plurality of battery cells 20 arranged side by side along the thickness direction of the battery cells 20. Optionally, two adjacent battery cells 20 may be connected to each other to form at least the battery cells 20 into an integral module, thereby improving the convenience of disassembly, assembly and maintenance of the plurality of battery cells 20.

[0078] The cooling structure 40 is configured as a water-cooled radiator, and a coolant flow channel is formed in the first water-cooling plate 41 and the second water-cooling plate 42 of the cooling structure 40. The cooling structure 40 is in contact with the battery cell 20, so that the heat of the battery cell 20 can be transferred to the cooling structure 40. In specific applications, the cooling structure 40 can exchange heat with the coolant in the coolant flow channel, so that the heat of the cooling structure 40 is taken away by the coolant, so as to achieve better heat dissipation of the battery device 100.

[0079] Among them, the first water-cooling plate 41 is located on one side of the multiple battery cells 20 along the second direction Y, and is extended along the first direction X, so that it can simultaneously contact the multiple battery cells 20 arranged side by side along the first direction X to exchange heat with the multiple battery cells 20; the second water-cooling plate 42 is arranged on one side of the multiple battery cells 20 along the third direction Z, and can also contact the multiple battery cells 20 at the same time, and can serve as a bottom structure for the multiple battery cells 20, so that the multiple battery cells 20 can be cooled and the module strength can be improved.

[0080] Optionally, the cooling structure 40 may be provided with a first water-cooling plate 41 only on one side of the multiple battery cells 20, or may be provided with two first water-cooling plates 41 spaced apart along the second direction Y and respectively located on both sides of the multiple battery cells 20, so as to increase the contact and heat exchange area between the cooling structure 40 and the multiple battery cells 20 and improve the cooling performance.

[0081] The end plate 30 is arranged on one side of the plurality of battery cells 20 along the first direction X, so that the end plate 30 and the cooling structure 40 are enclosed to form a receiving space for installing the plurality of battery cells 20. The end plate 30 and the first water-cooling plate 41 can respectively resist the expansion force of the battery cells 20 during the charging and discharging process in the first direction X and the second direction Y to improve the structural strength of the battery device 100.

[0082] The pressure strip 50 is arranged on the side of the battery cell 20 away from the second water-cooling plate 42. The battery cell 20 is sandwiched between the second water-cooling plate 42 and the pressure strip 50, which can better limit the battery cell 20, improve the modal main frequency of the battery device 100 in its height direction, improve the vibration resistance in the height direction, maintain the overall structural stability of the combination of the battery cell 20 and the cooling structure 40, and improve the structural strength.

[0083] In specific applications, the whole module formed by the cooling structure 40 and the battery cell 20 is fixed at the installation position by fixing the end plate 30, for example, the battery device 100 is fixed in the electrical device by fixing the end plate 30. Alternatively, in some embodiments, the battery device 100 may also include a box 10, and the battery cell 20, the cooling structure 40, the end plate 30 and other components are all accommodated in the accommodating space of the box 10, and the end plate 30 is connected to the box 10 to fix the cooling structure 40 and the battery cell 20 and other components in the box 10.

[0084] That is, the present application sets a first water-cooling plate 41 and a second water-cooling plate 42 in the cooling structure 40 of the battery device 100, and both the first water-cooling plate 41 and the second water-cooling plate 42 can cool the battery cell 20, thereby improving the cooling capacity of the battery device 100, and can improve the cooling capacity of the battery device 100, so that the battery device 100 can meet the heat dissipation requirements of higher rate fast charging. And the first water-cooling plate 41 and the end plate 30 respectively limit the battery cell 20 in the first direction X and the second direction Y to resist the high expansion force of the battery device 100 during charging and discharging; the second water-cooling plate 42 and the end plate 30 play a bottom supporting role for the battery cell 20, and the pressure strip 50 presses the battery cell 20 in the third direction Z, so as to improve the structural strength and modal main frequency of the battery device 100, thereby facilitating the increase of the volume of the battery device 100, the increase of the capacity of the battery cell 20 in the battery device 100, and the improvement of the energy density of the battery device 100.

[0085] Please refer to Figure 4 According to some embodiments of the present application, the first water-cooling plate 41 and the second water-cooling plate 42 are an integrated structure.

[0086] In this embodiment, the first water-cooling plate 41 and the second water-cooling plate 42 of the cooling structure 40 are integrated; the assembly and manufacturing process of the cooling structure 40 can be reduced, and the overall structural strength is high.

[0087] When the cooling structure 40 is specifically prepared, two layers of plates may be stacked to form an integral water-cooled plate with a coolant flow channel, and then the integral water-cooled plate may be bent through a bending process to form a first water-cooled plate 41 and a second water-cooled plate 42. Alternatively, the cooling structure 40 may be made through CNC flow channel processing, integral casting, coil welding, stamping, etc., which are not limited here.

[0088] According to some embodiments of the present application, the coolant flow channel of the first water-cooling plate 41 is connected to the coolant flow channel of the second water-cooling plate 42 .

[0089] In this embodiment, the coolant channels located on different side walls of the cooling structure 40 are interconnected, so that the coolant flows through the first water-cooled plate 41 and the second water-cooled plate 42, and performs a cooling cycle with the external cooling system. Among them, the coolant channels of the first water-cooled plate 41 and the second water-cooled plate 42 can be connected by a water pipe, or the first water-cooled plate 41 and the second water-cooled plate 42 can be set as an integrated structure. In this setting, the cooling structure 40 can only be provided with one set of coolant interfaces 43 for connecting to an external cooling system, thereby improving ease of use. The coolant interface 43 can be set on the first water-cooled plate 41 or the second water-cooled plate 42; or, a liquid inlet is set on one of the first water-cooled plate 41 and the second water-cooled plate 42, and a liquid outlet is set on the other, which is not limited here.

[0090] Please refer to Figure 3 According to some embodiments of the present application, a portion of the structure of the second water-cooling plate 42 is located on a side of the end plate 30 away from the battery cell 20 , and is provided with a coolant interface 43 connected to the coolant flow channel.

[0091] In this embodiment, a coolant interface 43 connected to the coolant flow channel is provided on the second water-cooled plate 42, so that in specific applications, the coolant can flow from the second water-cooled plate 42 to the first water-cooled plate 41, and then flow from the first water-cooled plate 41 back to the second water-cooled plate 42 to be discharged from the liquid outlet, that is, the coolant circulates between the first water-cooled plate 41 and the second water-cooled plate 42, thereby improving the cooling capacity. In addition, the coolant interface 43 of the cooling structure 40 is arranged on the side of the end plate 30 away from the battery cell 20, that is, located outside the receiving space enclosed by the cooling structure 40 and the end plate 30, so as to facilitate the cooling structure 40 to connect to the external cooling system.

[0092] Combined with reference Figure 3 and Figure 4 According to some embodiments of the present application, the cooling structure 40 includes two first water-cooling plates 41 arranged side by side along the second direction Y, and the plurality of battery cells 20 are located between the two first water-cooling plates 41 .

[0093] In this embodiment, the cooling structure 40 forms a structure that surrounds the multiple battery cells 20 on three sides, which can not only improve the structural strength, but also increase the contact area between the cooling structure 40 and the battery cells 20, thereby improving the cooling capacity, allowing the battery device 100 to dissipate heat quickly, thereby meeting higher heat dissipation requirements, and is conducive to increasing the capacity of the battery cells 20 in the battery device 100.

[0094] According to some embodiments of the present application, the first water cooling plate 41 is adhesively connected to the battery cell 20 .

[0095] In this embodiment, when assembling the battery cell 20 and the cooling structure 40, the battery cell 20 can be placed on the second water-cooling plate 42 first, and the structural adhesive can be sprayed on the inner surface of the first water-cooling plate 41, and the first water-cooling plate 41 can be placed on the side of the multiple battery cells 20 to bond the multiple battery cells 20. In one embodiment, the first water-cooling plate 41 and the second water-cooling plate 42 are an integrated structure. After the battery cell 20 is placed on the second water-cooling plate 42, the first water-cooling plate 41 is bent to the side of the multiple battery cells 20 through a bending process to bond with the battery cell 20. This arrangement allows the battery cell 20 to have a better connection strength with the cooling structure 40, thereby improving the overall structural strength of the battery device 100.

[0096] According to one embodiment of the present application, the second water cooling plate 42 is bonded to the battery cell 20 .

[0097] In this embodiment, structural adhesive is sprayed on the side of the second water-cooling plate 42 facing the battery cell 20, so that multiple battery cells 20 are placed on the second water-cooling plate 42 and bonded to each other. This can improve the connection strength between the cooling structure 40 and the battery cell 20 in the third direction Z, and keep the relative position of the battery cell 20 and the cooling structure 40 stable, so as to ensure that the second water-cooling plate 42 plays a stable bottoming and supporting role for the battery cell 20 in the third direction Z, improve the modal main frequency of the battery device 100, reduce the risk of loosening of the battery cell 20 and the cooling structure 40, and improve the overall structural strength.

[0098] Combined with reference Figures 3 to 5 According to some embodiments of the present application, a connecting ear 411 is provided at one end of the first water cooling plate 41 facing the end plate 30 . The connecting ear 411 is bent and extended toward one side of the end plate 30 and is located on the side of the end plate 30 away from the battery cell 20 .

[0099] In this embodiment, the first water-cooling plate 41 and the end plate 30 are connected to each other, and a connecting ear 411 can be formed at the end of the first water-cooling plate 41 by a riveting process, so that the first water-cooling plate 41 and the end plate 30 are riveted; in this way, the first water-cooling plate 41 is limitedly matched with the end plate 30 in the first direction X and the second direction Y through the connecting ear 411, which can improve the structural strength of the battery device 100, and the connection is convenient, which is conducive to reducing the manufacturing cost.

[0100] Please refer to Figure 5 According to some embodiments of the present application, a card interface 31 is provided on a side of the end plate 30 facing away from the battery cell 20 , and at least a portion of the structure of the connecting ear 411 is provided on the card interface 31 .

[0101] In this embodiment, a card interface 31 is provided at one end of the end plate 30 adjacent to the first water-cooling plate 41, and the card interface 31 is provided on the side of the end plate 30 facing away from the battery cell 20; the connecting ear 411 at the end of the first water-cooling plate 41 is limited in the card interface 31, so that the connecting ear 411 and the end plate 30 can be mutually limited in the third direction Z, which is beneficial to improving the overall structural strength and stability.

[0102] Please refer to Figure 3 and Figure 4 According to some embodiments of the present application, the battery device 100 also includes a connecting beam 60, which is arranged on the side of the second water-cooling plate 42 facing the battery cell 20 and extends along the second direction Y; multiple battery cells 20 are distributed on both sides of the connecting beam 60 along the first direction X, and the connecting beam 60 is connected to adjacent battery cells 20.

[0103] In this embodiment, the connecting beam 60 is disposed on the surface of the second water cooling plate 42 facing the battery cell 20 and connected to the second water cooling plate 42 . Optionally, the end of the connecting beam 60 may also be interconnected with the first water cooling plate 41 .

[0104] This arrangement can improve the structural strength of the cooling structure 40 by using the connecting beam 60 to act as a reinforcing rib, and the battery cell 20 is also connected to the connecting beam 60, thereby improving the installation strength and position stability of the battery cell 20, which is beneficial to improving the structural strength and modal main frequency of the battery device 100. The number of battery cells 20 can be increased in the first direction X, the volume of the battery device 100 can be increased, and the volume energy density of the battery device 100 can be improved.

[0105] Please refer to Figure 3 According to some embodiments of the present application, the pressure strip 50 is connected to the connecting beam 60 .

[0106] In this embodiment, the connection between the pressure strip 50 and the connecting beam 60 may be, but is not limited to, bonding, riveting, bolting or clamping. This arrangement allows the middle area of ​​the pressure strip 50 to be fixed, so as to improve the locking strength of the pressure strip 50, and avoid the situation where the middle area of ​​the pressure strip 50 has a weak pressing force when only the end of the pressure strip 50 is fixed, thereby ensuring that the pressure strip 50 can better limit the battery cell 20, thereby improving the structural strength of the battery device 100, so that the battery device 100 can meet higher mechanical performance requirements.

[0107] Combined with reference Figure 3 and Figure 4 According to some embodiments of the present application, the connecting beam 60 is provided with a first connecting structure 61 , and the second water-cooling plate 42 is provided with an avoidance opening 421 arranged opposite to the first connecting structure 61 .

[0108] In this embodiment, a clearance opening 421 is provided on the second water cooling plate 42, and the connecting beam 60 can be connected to an external structure at the clearance opening 421, for example, the connecting beam 60 is connected to an electrical device, or is connected to the box body 10 of the battery device 100, so that the module structure formed by the cooling structure 40, the battery cell 20 and the connecting beam 60 has a higher connection strength with the external structure, thereby meeting higher mechanical performance requirements.

[0109] Among them, the first connecting structure 61 provided on the connecting beam 60 can be configured as a connecting hole for passing bolts or other locking accessories; the first connecting structure 61 can also be configured as a clamping structure, or as an adhesive surface, which is not limited here.

[0110] Combined with reference Figure 3 and Figure 4 According to some embodiments of the present application, the battery device 100 further includes a restraining member 70 , which is clamped on the outside of the first water-cooling plate 41 and the end plate 30 .

[0111] In this embodiment, the restraining member 70 is disposed around the outside of the module structure formed by the battery cell 20, the end plate 30 and the cooling structure 40, and can clamp the module structure in the first direction X and the second direction Y to improve the resistance to the expansion force of the battery device 100 during charging and discharging, improve the structural strength, ensure the stability of the module structure, reduce the risk of deformation or displacement caused by the expansion of the battery cell 20, and improve the reliability of the battery device 100; thereby facilitating the large-size structural design of the battery device 100 and improving the capacity and volume energy density of the battery device 100. In addition, when the restraining member 70 is used to improve the resistance to the expansion force, the connection strength requirements of the first water-cooling plate 41 and the end plate 30 can be appropriately reduced, reducing the difficulty of assembly.

[0112] According to some embodiments of the present application, the restraining member 70 is configured as a steel belt, which is easy to install and has high structural strength, can ensure the stability of the module structure, reduce the risk of deformation or displacement caused by expansion of the battery cell 20, and improve the reliability of the battery device 100.

[0113] Please refer to Figure 3 and Figure 4 According to some embodiments of the present application, the battery device 100 includes two end plates 30 arranged side by side along a first direction X, a plurality of battery cells 20 are located between the two end plates 30, and both ends of the pressure strip 50 are respectively connected to the two end plates 30 in a one-to-one correspondence.

[0114] With this arrangement, the two end plates 30 can limit the multiple battery cells 20 on both sides of the multiple battery cells 20 along the first direction X, and both ends of the pressure strip 50 are fixed, which is beneficial to improving the overall structural strength of the battery device 100 and improving the resistance to the expansion force of the battery device 100.

[0115] According to some embodiments of the present application, the end plate 30 is bonded to the battery cell 20. In this arrangement, the end plate 30 and the battery cell 20 have good connection strength and are easy to connect and assemble.

[0116] Please refer to Figure 3 According to some embodiments of the present application, the plurality of battery cells 20 are arranged in a plurality of columns along the second direction Y.

[0117] In this embodiment, a plurality of battery cells 20 of the battery device 100 are arranged in an array along the first direction X and the second direction Y to form a plurality of columns of battery modules arranged along the second direction Y, and each column of battery modules has a plurality of battery cells 20 arranged along the first direction X. With this arrangement, the battery device 100 forms a multi-row large module structure, with high space utilization and high structural stability, which is beneficial to improving the capacity and volume energy density of the battery device 100.

[0118] Please refer to Figure 2 According to some embodiments of the present application, the battery device 100 further includes a box body 10 , in which the battery cell 20 , the end plate 30 , the cooling structure 40 and the pressure strip 50 are all located, and the end plate 30 is connected to the box body 10 .

[0119] In this embodiment, the battery cell 20, cooling structure 40 and other components in the battery device 100 are installed in the box 10, and the box 10 can be used for protection to reduce the risk of damage. The battery cell 20, cooling structure 40 and end plate 30 are connected to each other to form an integral module, which can be disassembled and assembled together, and connected to the box 10 through the end plate 30. The boxing process is simple and has a certain degree of reworkability, reducing the difficulty of repair and replacement.

[0120] The end plate 30 is provided with a second connection structure 32 for connecting with the box body 10. The second connection structure 32 may have a connection hole for inserting a lock accessory, or may be provided as a snap-on structure or other connection structures, which are not limited here.

[0121] The present application also provides an electrical device, which includes a battery device 100 as in any of the above embodiments. The specific structure of the battery device 100 in this embodiment refers to the above embodiment.

[0122] By using the aforementioned battery device 100 in an electrical device, since the battery device 100 has a high structural strength and good heat dissipation performance, a battery device 100 with a larger volume and more battery cells 20 capacity can be used in the electrical device, which can achieve higher rate fast charging and better battery life.

[0123] Since all the technical solutions of all the above embodiments are adopted in the electrical device, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0124] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are arranged side by side at least along a first direction; an end plate, the end plate being located on one side of the plurality of battery cells along the first direction and connected to adjacent battery cells; A cooling structure, the cooling structure comprising a first water-cooling plate and a second water-cooling plate, the first water-cooling plate being located on one side of the plurality of battery cells along the second direction, and the second water-cooling plate being located on one side of the plurality of battery cells along the third direction; as well as A pressure strip is located on a side of the battery cell away from the second water-cooling plate and extends along the first direction. One end of the pressure strip is connected to the end plate. The first direction, the second direction and the third direction intersect each other.

2. The battery device according to claim 1, characterized in that The first water-cooling plate and the second water-cooling plate are an integrated structure.

3. The battery device according to claim 1, characterized in that: The cooling liquid flow channel of the first water-cooling plate is communicated with the cooling liquid flow channel of the second water-cooling plate.

4. The battery device according to claim 1, wherein: Part of the structure of the second water-cooling plate is located on a side of the end plate away from the battery cell, and is provided with a coolant interface communicating with the coolant flow channel.

5. The battery device according to claim 1, wherein: The cooling structure includes two first water-cooling plates arranged side by side along the second direction, and the plurality of battery cells are located between the two first water-cooling plates.

6. The battery device according to claim 1, wherein: The first water cooling plate is adhesively connected to the battery cell; And / or, the second water cooling plate is adhesively connected to the battery cell.

7. The battery device according to any one of claims 1 to 6, characterized in that: A connecting ear is provided at one end of the first water-cooling plate facing the end plate. The connecting ear is bent and extended toward one side of the end plate and is located at a side of the end plate away from the battery cell.

8. The battery device according to claim 7, characterized in that: A card interface is provided on a side of the end plate facing away from the battery cell, and at least a part of the structure of the connecting ear is provided on the card interface.

9. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further includes a connecting beam, which is disposed on a side of the second water-cooling plate facing the battery cell and extends along the second direction; The plurality of battery cells are distributed on both sides of the connection beam along the first direction, and the connection beam is connected to adjacent battery cells.

10. The battery device according to claim 9, characterized in that The pressure strip is connected to the connecting beam.

11. The battery device according to claim 9, characterized in that: The connecting beam is provided with a first connecting structure, and the second water-cooling plate is provided with a avoidance opening arranged opposite to the first connecting structure.

12. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further includes a restraining member, which is disposed on the outside of the first water-cooling plate and the end plate.

13. The battery device according to claim 12, characterized in that: The restraining member is configured as a steel belt.

14. The battery device according to any one of claims 1 to 6, characterized in that: The battery device includes two end plates arranged side by side along the first direction, a plurality of battery cells are located between the two end plates, and two ends of the pressure strip are respectively connected to the two end plates in a one-to-one correspondence.

15. The battery device according to any one of claims 1 to 6, characterized in that: The plurality of battery cells are arranged in a plurality of rows along the second direction.

16. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further comprises a box body, the battery cell, the end plate, the cooling structure and the pressure strip are all located in the box body, and the end plate is connected to the box body.

17. An electrical device, characterized in that: The electrical device comprises the battery device as claimed in any one of claims 1 to 16.

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