Battery device, electric equipment and box body

Abstract

The utility model discloses a battery device, electric equipment and a box body, the battery device comprises the box body and a plurality of battery monomers, the box body is provided with an accommodating cavity, and the plurality of battery monomers are accommodated in the accommodating cavity; the box body comprises a cold plate, and the cold plate is attached to the battery monomers to cool the battery monomers; wherein a channel for a cooling medium to flow and pass through is formed in the cold plate, a plurality of wave-proof plates are arranged in the channel and divide the channel into a plurality of cavities in the extending direction of the channel, and the wave-proof plates are provided with openings for communicating the adjacent cavities; the cold plate defines a first direction and a second direction which are perpendicular to each other, the channel comprises a plurality of flow channels extending in the first direction and a flow collecting cavity located at the ends of the flow channels in the first direction, and the flow collecting cavity is used for communicating at least two flow channels; a wave-proof plate is arranged in the flow channel, and / or a wave-proof plate is arranged in the flow collecting cavity. According to the scheme, the channel is divided into the multiple cavities, the flow resistance can be increased, and therefore the water flow noise in the cold plate is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices, electrical equipment and boxes. Background Art

[0002] In the related art, a battery device may include a housing and a plurality of battery cells, wherein the plurality of battery cells are disposed in the housing. During the use of the battery device, the battery cells in the battery device will generate heat. If the heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, the housing usually includes a cold plate for abutting against the battery cells to exchange heat with the battery cells. However, when the cooling medium in the cold plate flows, water flow noise is generated, which is prone to abnormal noise. Utility Model Content

[0003] The purpose of the present application is to reduce abnormal noise caused by water flow noise generated in a cold plate of a battery device.

[0004] In order to solve the above technical problems, the first technical solution provided by the present application is: a battery device, comprising a box body and a plurality of battery cells, the box body having a accommodating cavity, and the plurality of battery cells being accommodated in the accommodating cavity; the box body comprising a cold plate, the cold plate being close to the battery cells to cool the battery cells; wherein a channel for a cooling medium to flow through is formed inside the cold plate, and the channel has a cooling medium inlet and a cooling medium outlet, a plurality of wave-breaking plates are arranged in the channel, the plurality of wave-breaking plates divide the channel into a plurality of chambers along the extension direction of the channel, and the wave-breaking plates are provided with openings for connecting adjacent chambers; the cold plate is defined with a first direction and a second direction perpendicular to each other, and the first direction and the second direction are both perpendicular to the thickness direction of the cold plate; the channel comprises a plurality of flow channels extending along a first direction and a manifold located at the ends of the plurality of flow channels in the first direction, the plurality of flow channels are arranged along a second direction, the manifold extends along the second direction, and the manifold is used to connect at least two flow channels; a wave-breaking plate is arranged in the flow channel, and / or a wave-breaking plate is arranged in the manifold.

[0005] The beneficial effect of the battery device provided in the present application is that a plurality of wave-breaking plates are arranged in the channel of the cold plate, and the plurality of wave-breaking plates can divide the channel into a plurality of chambers along the extension direction of the channel, and the adjacent chambers are connected through the openings on the wave-breaking plates. By dividing the channel into a plurality of chambers, the flow resistance can be increased, so that the cooling medium is not easy to flow in a large range in the channel, and a buffering effect is played on the cooling medium flowing in the channel, thereby reducing the water flow noise in the cold plate.

[0006] Based on the above technical solution, the present application can also be improved as follows.

[0007] In some embodiments, the wave-breaking plate in the flow channel is disposed at one end of the flow channel close to the manifold.

[0008] In this way, in the first direction, the flow velocity of the cooling medium in the flow channel is relatively gentle in the middle part of the flow channel, and will impact the manifold at the end of the flow channel close to the manifold, so the water flow noise near the end is greater. Specifically, the cooling medium flow in the flow channel impacts the inner wall of the manifold, so the water flow near one end of the manifold is relatively turbulent, which is easy to generate water flow noise. A wave-breaking plate is arranged at one end of the flow channel close to the manifold, which can buffer the relatively turbulent water flow at one end of the flow channel close to the manifold, thereby reducing the water flow noise.

[0009] In some embodiments, at least one flow channel has a vortex region, and a wave-breaking plate is disposed in at least the flow channel having the vortex region.

[0010] In this way, the cooling medium generates eddy current in the eddy current zone in the flow channel, thereby generating large water flow noise. Providing a wave-breaking plate in the flow channel with the eddy current zone can slow down the water flow in the flow channel with the eddy current zone, thereby reducing the water flow noise.

[0011] In some embodiments, a plurality of wave-breaking plates are each fixed in the channel; or, a plurality of wave-breaking plates are fixed into an integral wave-breaking structure by means of fixing elements, and the integral wave-breaking structure is fixed in the channel.

[0012] In this way, there can be many ways to fix several wave-breaking boards in the channel: when several wave-breaking boards are fixed in the channel respectively, the installation of each wave-breaking board does not affect each other; when multiple wave-breaking boards are fixed into an integral wave-breaking structure by fixing elements, the integral wave-breaking structure can be installed in the channel as a whole without having to fix and install individual wave-breaking boards one by one, so the installation is quicker and more convenient.

[0013] In some embodiments, multiple wave-breaking plates are fixed into an integral wave-breaking structure by a fixing element, and the integral wave-breaking structure is fixed in the cold plate; the fixing element includes a first fixing member and a second fixing member that are arranged at intervals, and one end of the multiple wave-breaking plates of the integral wave-breaking structure is fixed by the first fixing member, and the other end is fixed by the second fixing member.

[0014] In this way, the plurality of wave-breaking plates of the overall wave-breaking structure are fixed by the first fixing member and the second fixing member, so that the overall wave-breaking structure can form a frame structure that is stable and not easily deformed.

[0015] In some embodiments, the first fixing member includes a first fixing plate, the second fixing member includes a second fixing plate, and a plurality of wave-breaking plates of the overall wave-breaking structure are fixed between the first fixing plate and the second fixing plate.

[0016] In this way, the first fixing member and the second fixing member are both structures of a single plate. This is one of the structures of the first fixing member and the second fixing member. The structures of the first fixing member and the second fixing member are simpler, and it is also more convenient to fix multiple wave-breaking plates between the first fixing member and the second fixing member.

[0017] In some embodiments, the first fixing member includes a plurality of first connecting plates, the second fixing member includes a plurality of second connecting plates, and every two adjacent wave-breaking plates of the overall wave-breaking structure are connected by a first connecting plate and a second connecting plate.

[0018] In this way, the first fixing member and the second fixing member are both structures of multiple plates, which is another structure of the first fixing member and the second fixing member. The first fixing member and the second fixing member will not increase the size of the cross-section of the overall wave-breaking structure.

[0019] In some embodiments, the first fixing member and the second fixing member in the flow channel extend along a first direction, and the first fixing member and the second fixing member are respectively abutted against and fixed to two opposite side walls of the flow channel.

[0020] In this way, the first fixing member and the second fixing member will not hinder the flow of the cooling medium in the flow channel.

[0021] In some embodiments, the first fixing member and the second fixing member in the manifold extend along the second direction, and the first fixing member and the second fixing member are respectively abutted against and fixed to two opposite top walls and bottom walls of the manifold.

[0022] In this way, the first fixing member and the second fixing member will not hinder the flow of the cooling medium in the manifold, and the first fixing member and the second fixing member will not hinder the cooling medium in the flow channel from flowing into the manifold.

[0023] In some embodiments, the openings on adjacent wave-breaking plates in the flow channel are staggered in the first direction; thus, the flow speed of the cooling medium in the flow channel can be further slowed down, thereby slowing down the shaking of the cooling medium in the flow channel;

[0024] And / or, the openings on adjacent wave-breaking plates in the manifold are staggered in the second direction; in this way, the flow speed of the cooling medium in the manifold can be further slowed down, thereby slowing down the shaking of the cooling medium in the manifold.

[0025] In some embodiments, the opening comprises a through hole provided on the wave-breaking board; and / or, the opening comprises a notch provided on an edge of the wave-breaking board.

[0026] In this way, the opening on the wave-breaking plate can be formed in a variety of ways. When the opening includes a through hole arranged on the wave-breaking plate, that is, the opening is arranged on the inner side of the edge of the wave-breaking plate, the opening will not affect the fixed installation of the edge of the wave-breaking plate in the channel; when the opening includes a notch arranged on the edge of the wave-breaking plate, that is, the opening is arranged on the edge of the wave-breaking plate, the openings on adjacent wave-breaking plates are more easily staggered.

[0027] In some embodiments, the wave-breaking board is a flat board, a folded board or a curved board.

[0028] The wave-breaking plate can have many shapes. When the wave-breaking plate is a flat plate, its structure is simpler. When the wave-breaking plate is a folded plate, the contact area between the cooling medium and the wave-breaking plate is larger, and the cooling effect is better. When the wave-breaking plate is a curved plate, the contact area between the cooling medium and the wave-breaking plate is larger and the cooling medium has less resistance when flowing through the curved plate.

[0029] In some embodiments, a plurality of ribs extending along a first direction are provided in the cold plate, and the plurality of ribs are arranged at intervals along a second direction, and the cavity in the cold plate is formed into a plurality of flow channels by the plurality of ribs; a plurality of wave-breaking plates in the collecting cavity are connected to the plurality of ribs one-to-one, so that the plurality of chambers in the collecting cavity are connected to the plurality of flow channels one-to-one.

[0030] In this way, after the cooling medium in the flow channel flows into the manifold, the cooling medium in one flow channel just corresponds to entering a small chamber of the manifold, which has a better effect of reducing water flow noise.

[0031] In some embodiments, the collecting chamber includes a first collecting chamber and a second collecting chamber, and the first collecting chamber and the second collecting chamber are respectively located at the two ends of multiple flow channels in the first direction, one end of the multiple flow channels in the first direction is connected to the cooling medium inlet through the first collecting chamber, and the other end of the multiple flow channels in the first direction is connected to the cooling medium outlet through the second collecting chamber.

[0032] In this way, the flow direction of the cooling medium in multiple flow channels is the same, and the cooling medium flows from one end to the other end of the multiple flow channels. If the cooling medium has different flow directions in the multiple flow channels, the cooling medium needs to be reversed in flow direction, and the resulting water flow noise is greater. If the cooling medium has the same flow direction in the multiple flow channels, the cooling medium does not need to be reversed in flow direction, and the resulting water flow noise is smaller.

[0033] In some embodiments, the multiple flow channels include a plurality of first flow channels and a plurality of second flow channels arranged in the second direction; the collecting cavity includes a third collecting cavity, and the third collecting cavity is located at one end of the plurality of first flow channels and the plurality of second flow channels in the first direction; one end of the plurality of first flow channels in the first direction is connected to the third collecting cavity, and the other end of the plurality of first flow channels in the first direction is connected to the cooling medium inlet; one end of the plurality of second flow channels in the first direction is connected to the third collecting cavity, and the other end of the plurality of first flow channels in the first direction is connected to the cooling medium inlet.

[0034] In this way, the cooling medium has different flow directions in multiple flow channels. If the cooling medium has the same flow direction in multiple flow channels, that is, the cooling medium does not need to be turned, then after the cooling medium enters the channel from the cooling medium inlet, it needs to be diverted to enter each flow channel, which may cause the flow rate of the cooling medium in each flow channel to be small, and the cooling effect on the battery cell is not good; while in this embodiment, the cooling medium has different flow directions in multiple flow channels, that is, the cooling medium needs to be turned, then after the cooling medium enters the channel from the cooling medium inlet, it only needs to be diverted to enter a part of the flow channels, instead of being diverted to enter each flow channel, so the flow rate of the cooling medium in each flow channel is larger, so as to improve the cooling effect on the battery cell.

[0035] In order to solve the above technical problems, the second technical solution provided in the present application is: an electrical device, comprising a battery device according to any of the above solutions, and the battery device is used to provide electrical energy to the electrical device.

[0036] The electrical equipment provided in the present application has all the advantages of the battery device described in any of the above solutions, which will not be repeated here.

[0037] To solve the above technical problems, the third technical solution provided in the present application is: a box body, including a cold plate, a channel for cooling medium to flow through is formed inside the cold plate, and the channel has a cooling medium inlet and a cooling medium outlet, and a plurality of wave-breaking plates are arranged in the channel, and the plurality of wave-breaking plates divide the channel into a plurality of chambers along the extension direction of the channel, and the wave-breaking plates are provided with openings for connecting adjacent chambers; the cold plate is defined with a first direction and a second direction perpendicular to each other, and the first direction and the second direction are both perpendicular to the thickness direction of the cold plate; the channel includes a plurality of flow channels extending along the first direction and a collecting chamber located at the ends of the plurality of flow channels in the first direction, the plurality of flow channels are arranged along the second direction, the collecting chamber extends along the second direction, and the collecting chamber is used to connect at least two flow channels; a wave-breaking plate is provided in the flow channel, and / or a wave-breaking plate is provided in the collecting chamber.

[0038] The box body provided in the present application includes a cold plate. After the cooling medium enters the channel through the cooling medium inlet, it can flow in the flow channel and the collecting cavity. Since the flow channel extends along the first direction and the multiple flow channels are arranged along the second direction, and the collecting cavity extends along the second direction, the entire plate surface of the cold plate can be cooled, and the cooling area is large. Moreover, since the cooling medium flows through both the flow channel and the collecting cavity, the cold plate may generate water flow noise in both the flow channel and the collecting cavity. The wave-breaking plate of this embodiment can be arranged only in the flow channel, only in the collecting cavity, or in both the flow channel and the collecting cavity. The water flow noise generated when the cooling medium flows can be reduced through the buffering effect of the wave-breaking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0040] Figure 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0041] Figure 2 is an exploded view of a battery device provided in an embodiment of the present application;

[0042] Figure 3A It is a structural schematic diagram of an embodiment of a cold plate in a battery device provided by the present application;

[0043] Figure 3B yes Figure 3A The enlarged view of point a in the middle;

[0044] Figure 3C is a structural schematic diagram of another embodiment of a cold plate in a battery device provided by the present application;

[0045] Figure 3D yes Figure 3C The enlarged image of point b in the middle;

[0046] Figure 3E is a structural schematic diagram of another embodiment of a cold plate in a battery device provided in the present application;

[0047] Figure 3F is a structural schematic diagram of yet another embodiment of a cold plate in a battery device provided in the present application;

[0048] Figure 4A It is a structural schematic diagram of an embodiment of a channel in a cold plate of a battery device provided in the present application;

[0049] Figure 4B yes Figure 4A A schematic diagram of the flow direction of the cooling medium in the channel;

[0050] Figure 5A is a structural schematic diagram of another embodiment of a channel in a cold plate in a battery device provided in the present application;

[0051] Figure 5B yes Figure 5A A schematic diagram of the flow direction of the cooling medium in the channel;

[0052] Fig. 6A is a structural schematic diagram of another embodiment of a channel in a cold plate in a battery device provided in the present application;

[0053] Figure 6B yes Fig. 6A A schematic diagram of the flow direction of the cooling medium in the channel;

[0054] Fig. 7A is a structural schematic diagram of yet another embodiment of a channel in a cold plate in a battery device provided by the present application;

[0055] Figure 7B yes Fig. 7A A schematic diagram of the flow direction of the cooling medium in the channel;

[0056] Figure 8 yes Figure 3A Schematic diagram of the structure of the cold plate after removing the wave-breaking plate;

[0057] Fig. 9 It is a partial enlarged view of another embodiment of the cold plate in the battery device provided by the present application at the anti-wave plate;

[0058] Fig.10 It is a three-dimensional schematic diagram of the overall wave-proof structure in the cold plate of the battery device provided in the present application;

[0059] Fig.11A It is a structural schematic diagram of an embodiment of an integral wave-proof structure;

[0060] Fig. 11B yes Fig.11A A side view of the overall wave-breaking structure;

[0061] Fig. 12A is a structural schematic diagram of another embodiment of the integral wave-proof structure;

[0062] Fig. 12B yes Fig. 12A Side view of the overall wave-breaking structure.

[0063] Description of reference numerals:

[0064] Battery device 100; battery cell 10; box body 20; cold plate 21; channel 210; chamber 2100; cooling medium inlet 2101; cooling medium outlet 2102; flow channel 2103; rib 21030; flow area 2103A; first flow channel 21031; second flow channel 21032; manifold 2104; first manifold 21041; second manifold 21042; third manifold 21043; wave-breaking plate 211; opening 2110; fixing element 212; first fixing member 2121; first fixing plate 21211; first connecting plate 21212; second fixing member 2122; second fixing plate 21221; second connecting plate 21222; box body 22; first box body 221; second box body 222; accommodating chamber 201;

[0065] Controller 200;

[0066] Motor 300;

[0067] Vehicles 1000;

[0068] First direction X; second direction Y. DETAILED DESCRIPTION

[0069] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0070] 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" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0071] In the description of the embodiments of the present application, the technical terms "first", "second", "third", 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.

[0072] 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.

[0073] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. 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.

[0074] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They 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, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0075] 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.

[0076] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0077] During the use of the battery device, the battery cells in the battery device will generate heat. If the heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, the box body usually includes a cold plate, which is used to abut against the battery cells to exchange heat with the battery cells. However, when the cooling medium in the cold plate flows, water flow noise is generated, and abnormal noise is prone to occur. This is because there are channels for the cooling medium to flow inside the cold plate. These channels usually have a small flow resistance. The cooling medium flows in the channels in a large range and at a fast flow rate, which is easy to generate noise.

[0078] In view of this, in order to reduce the abnormal sound caused by the water flow noise generated when the cooling medium flows in the cold plate, an embodiment of the present application provides a battery device. The battery device includes a box body and a battery cell, the box body has a receiving cavity, and a plurality of battery cells are received in the receiving cavity, the box body includes a cold plate, and the cold plate is close to the battery cell to cool the battery cell; wherein a channel for the cooling medium to flow through is formed inside the cold plate, and the channel has a cooling medium inlet and a cooling medium outlet, and a plurality of wave-breaking plates are arranged in the channel, and the plurality of wave-breaking plates divide the channel into a plurality of chambers along the extension direction of the channel, and the wave-breaking plates are provided with openings for connecting adjacent chambers.

[0079] The battery device provided in the embodiment of the present application comprises a box body and a battery cell. The box body has a accommodating cavity. A plurality of battery cells are accommodated in the accommodating cavity. The box body protects the plurality of battery cells. The box body comprises a cold plate. The cold plate is attached to the battery cell to cool the battery cell. A plurality of wave-breaking plates are arranged in the channel of the cold plate. The plurality of wave-breaking plates can divide the channel into a plurality of chambers. Adjacent chambers are connected via openings on the wave-breaking plates. By dividing the channel into a plurality of chambers, the flow resistance can be increased, so that the cooling medium is not easy to flow in a large range in the channel, and a buffering effect is played on the cooling medium flowing in the channel, thereby reducing the water flow noise in the cold plate.

[0080] The battery device involved in the embodiment of the present application can be used for electrical equipment that uses the battery device as a power source. The electrical equipment involved in the embodiment of the present application may be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, vehicles, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like. According to the power source, the vehicle 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, and the like. According to the drive mode, the vehicle may be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle.

[0081] The electrical equipment includes the equipment body and the battery device involved in the context. The equipment body is the main frame structure of the electrical equipment. For example, when the electrical equipment is a vehicle, the equipment body is the vehicle body. When the electrical equipment is a ship, the equipment body is the ship hull.

[0082] In other embodiments, the battery device involved in the embodiments of the present application can also be used in an energy storage system that uses the battery device as an energy storage element. Among them, the energy storage system can include an energy storage container, an energy storage cabinet, etc.

[0083] For ease of description, the embodiments of the present application are described using an electrical device as a vehicle as an example.

[0084] See also Figure 1 , Figure 11 is a schematic diagram of the structure of the vehicle provided in an embodiment of the present application. A controller 200, a motor 300 and a battery device 100 may be provided inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 may be provided at the bottom, front or rear 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, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but also 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.

[0085] See also Figure 2 , Figure 2 is an exploded view of a battery device provided in an embodiment of the present application. The battery device 100 may include a box body 20 and a plurality of battery cells 10 . The box body 20 is used to accommodate the plurality of battery cells 10 .

[0086] The battery device 100 according to the embodiment of the present application refers to a single physical module including a plurality of battery cells 10 to provide higher voltage and capacity.

[0087] The battery cell 10 involved in the embodiment of the present application refers to the smallest unit for storing and outputting electric energy. The battery cell 10 may be a secondary battery, which refers to a battery cell 10 that can be used continuously by activating the active material by charging after the battery cell 10 is discharged. Each battery cell 10 may also be a primary battery.

[0088] The battery cell 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the present embodiment. The battery cell 10 can be cylindrical, flat, rectangular or other shapes.

[0089] In the battery device 100, there are multiple battery cells 10, and the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 10 are both connected in series and in parallel. Multiple battery cells 10 may be 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 20. It is also possible that all battery cells 10 are directly connected in series, in parallel, or in a mixed connection, and then the whole formed by all battery cells 10 is accommodated in the box 20. In some embodiments, the battery device 100 may also include a busbar, and multiple battery cells 10 can be electrically connected through the busbar to achieve the series connection, parallel connection, or mixed connection of multiple battery cells 10. The busbar may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0090] The box body 20 is used to encapsulate multiple battery cells 10, so as to protect the battery cells 10 and reduce the impact of liquid or other foreign matter on the charging or discharging of the battery cells 10. Specifically, the box body 20 has a receiving cavity 201, and the multiple battery cells 10 are received in the receiving cavity 201.

[0091] In some embodiments, the box 20 may be a part of the chassis structure of the vehicle 1000. For example, the top cover of the box 20 may become at least a part of the floor of the vehicle 1000, or the frame of the box 20 may become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0092] The box 20 is a packaging structure for multiple battery cells 10, and the box 20 can have various structures. Figure 2 The box body 20 includes a box body 22. The box body 22 is a frame structure of the box body 20. The box body 22 may include a first box body 221 and a second box body 222. The first box body 221 and the second box body 222 cover each other. The first box body 221 and the second box body 222 jointly define a receiving cavity 201 for receiving the battery cell 10. The second box body 222 may be a hollow structure with one end open. The first box body 221 is a plate-like structure. The first box body 221 covers the open side of the second box body 222 to form the box body 22 with the receiving cavity 201. The first box body 221 and the second box body 222 may also be a hollow structure with one side open. The open side of the first box body 221 covers the open side of the second box body 222 to form the box body 22 with the receiving cavity 201. Of course, the first box body 221 and the second box body 222 may be in various shapes, such as a cylinder, a cuboid, etc.

[0093] In order to improve the sealing performance after the first box body 221 and the second box body 222 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 221 and the second box body 222 .

[0094] Assuming that the first box body 221 covers the top of the second box body 222 , the first box body 221 can also be called an upper box cover, and the second box body 222 can also be called a lower box cover.

[0095] The box body 22 can be a simple three-dimensional structure such as a single cuboid, a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders or spheres. The box body 22 can be made of alloy materials such as aluminum alloy, iron alloy, polymer materials such as polycarbonate, polyisocyanurate foam plastic, or composite materials such as glass fiber and epoxy resin.

[0096] In some embodiments, the box body 20 further includes a cold plate 21. The cold plate 21 is a part of the box body 20. The cold plate 21 is used to abut against the battery cell 10 and perform heat exchange with the battery cell 10, thereby cooling the battery cell 10 and reducing the heat generated by the battery cell 10 during the use of the battery device 100, thereby alleviating the problem of adverse effects on the performance and service life of the battery device 100 caused by excessive heat of the battery cell 10.

[0097] The cold plate 21 contains a cooling medium, and the cooling medium flows to cool the plurality of battery cells 10. The cooling medium here may be a liquid, and the cold plate 21 may also be called a liquid cooling plate.

[0098] In some embodiments, the cold plate 21 can be accommodated in the box body 22 ( Figure 2 Specifically, in some embodiments, the cold plate 21 is disposed between the battery cell 10 and the bottom wall of the box body 22 , and the bottom wall is used to support the battery cell 10 .

[0099] In some embodiments, the cold plate 21 is located outside the box body 22 (not shown in the figure). Specifically, in some embodiments, the cold plate 21 is located on a side of the bottom wall of the box body 22 that is away from the battery cells 10 .

[0100] In some embodiments, the cold plate 21 may also serve as the bottom wall of the box body 22 (not shown in the figure).

[0101] The embodiment of the present application provides a battery device 100, which can reduce the abnormal sound problem caused by water flow noise in the cold plate 21 of the battery device 100. The specific structure of the battery device 100 and the principle of how to reduce the abnormal sound problem caused by water flow noise in the cold plate 21 of the battery device 100 are described in detail below in conjunction with the accompanying drawings.

[0102] See also Figure 2 as well as FIG. 3A to FIG. 3F The embodiment of the present application provides a battery device 100, which includes a box body 20 and a plurality of battery cells 10. The box body 20 has a receiving cavity 201, and the plurality of battery cells 10 are received in the receiving cavity 201. The box body 20 includes a cold plate 21, and the cold plate 21 is close to the battery cells 10 to cool the battery cells 10; wherein a channel 210 for a cooling medium to flow through is formed inside the cold plate 21, and the channel 210 has a cooling medium inlet 2101 and a cooling medium outlet 2102, and a plurality of wave-breaking plates 211 are arranged in the channel 210, and the plurality of wave-breaking plates 211 divide the channel 210 into a plurality of chambers 2100 along the extension direction of the channel 210, and the wave-breaking plates 211 are provided with openings 2110 for connecting adjacent chambers 2100.

[0103] The box body 20 is a component for accommodating a plurality of battery cells 10 .

[0104] The cold plate 21 of the box body 20 is a component for cooling the battery cells 10 . The battery cells 10 are cooled by the cooling medium flowing through the channels 210 formed inside the cold plate 21 .

[0105] The meaning of the channel 210 refers to all cavities inside the cold plate 21 through which the cooling medium flows, which are collectively referred to as the channel 210 .

[0106] The principle of the cold plate 21 cooling the battery cell 10 is as follows: the cooling medium enters the channel 210 through the cooling medium inlet 2101 and flows through the channel 210. The heat of the battery cell 10 is transferred to the cold plate 21 and then to the cooling medium. The cooling medium absorbs the heat from the battery cell 10 and flows out through the cooling medium outlet 2102, releasing the heat, thereby completing the cooling of the battery cell 10.

[0107] It should be noted that the specific type of the cooling medium is not limited here, as long as it can cool the battery cell 10, for example, it can be liquid. In the embodiment of the present application, the cooling medium is described as water.

[0108] See again FIG. 3A to FIG. 3F A plurality of wave-breaking plates 211 are disposed in the channel 210 . The plurality of wave-breaking plates 211 divide the channel 210 into a plurality of chambers 2100 along the extension direction of the channel 210 . The wave-breaking plates 211 are provided with openings 2110 for connecting adjacent chambers 2100 . FIG. 3A to FIG. 3F Various situations are shown in which a plurality of wave-breaking plates 211 are arranged at different positions in the channel 210 .

[0109] The extension direction of the channel 210 means the direction in which the cooling medium flows in the channel 210. It should be noted that the extension direction of the channel 210 does not refer to a linear direction, but the path through which the cooling medium inlet 2101 flows after entering the channel 210.

[0110] When the wave-breaking plate 211 is not provided inside the cold plate 21, the cooling medium flows in the channel 210 and generates relatively large water flow noise. In particular, when the cooling medium flows through a relatively long path in the channel 210, the cooling medium impacts the inner wall of the channel 210 more seriously, and the water flow noise generated by the impact is also relatively large. In addition, when the vehicle 1000 is started, braked, accelerated or decelerated, the cooling medium will swing or shake significantly in the channel 210 due to the inertia of the cooling medium, which will generate further impact force on the inner wall of the channel 210, and the cooling medium itself will flow more rapidly and more turbulently, thereby resulting in relatively obvious water flow noise generated inside the cold plate 21.

[0111] In the embodiment of the present application, a plurality of wave-breaking plates 211 are arranged in the channel 210 of the cold plate 21. The plurality of wave-breaking plates 211 can divide the channel 210 into a plurality of chambers 2100. Adjacent chambers 2100 are connected via openings 2110 on the wave-breaking plates 211. By dividing the channel 210 into a plurality of chambers 2100, the flow resistance can be increased, so that the cooling medium is not easy to flow and shake greatly in the channel 210, which has a buffering effect on the cooling medium flowing in the channel 210, and reduces the impact of the shaking or swinging of the cooling medium in the channel 210 on the inner wall of the channel 210, thereby reducing the water flow noise in the cold plate 21.

[0112] In some embodiments, the cold plate 21 defines a first direction X and a second direction Y that are perpendicular to each other, and the first direction X and the second direction Y are both perpendicular to the thickness direction of the cold plate 21 .

[0113] The channel 210 includes a plurality of flow channels 2103 extending along a first direction X and a collecting chamber 2104 located at the ends of the plurality of flow channels 2103 in the first direction X. The plurality of flow channels 2103 are arranged along a second direction Y, and the collecting chamber 2104 extends along the second direction Y. The collecting chamber 2104 is used to connect at least two flow channels 2103; a wave-breaking plate 211 is provided in the flow channel 2103, and / or a wave-breaking plate 211 is provided in the collecting chamber 2104.

[0114] The collecting chamber 2104 is used to gather the ends of multiple flow channels 2103 in the first direction X, so as to facilitate the connection between the multiple flow channels 2103 and the cooling medium inlet 2101, and also to facilitate the connection between the multiple flow channels 2103 and the cooling medium outlet 2102, and also to facilitate the reversal of the flow direction when the cooling medium flows from one part of the flow channel 2103 to another part of the flow channel 2103.

[0115] In this embodiment, the channel 210 includes a plurality of flow channels 2103 and a manifold 2104 located at the ends of the plurality of flow channels 2103. After the cooling medium enters the channel 210 through the cooling medium inlet 2101, it can flow in the flow channels 2103 and the manifold 2104. Since the flow channels 2103 extend along the first direction X and the plurality of flow channels 2103 are arranged along the second direction Y, and the manifold 2104 extends along the second direction Y, the entire surface of the cold plate 21 can be cooled, and the cooling area And because cooling medium flows through both the flow channel 2103 and the manifold 2104, the cold plate 21 may generate water flow noise in both the flow channel 2103 and the manifold 2104. The wave-breaking plate 211 of this embodiment can be arranged only in the flow channel 2103, or only in the manifold 2104, or in both the flow channel 2103 and the manifold 2104. The water flow noise generated by the flow of cooling medium can be reduced by the buffering effect of the wave-breaking plate 211.

[0116] In some embodiments, the wave-breaking plate 211 is disposed in the flow channel 2103, but not in the manifold 2104. Further, each of the plurality of flow channels 2103 is provided with a wave-breaking plate 211, or a portion of the plurality of flow channels 2103 is provided with a wave-breaking plate 211, and another portion of the plurality of flow channels 2103 is not provided with a wave-breaking plate 211.

[0117] In some embodiments, the wave-breaking plate 211 is disposed in the manifold 2104 but not in the flow channel 2103 .

[0118] In some embodiments, wave-breaking plates 211 are disposed in the flow channel 2103 and the manifold 2104 .

[0119] It should be noted that FIG. 3A to FIG. 3F The structure of the internal channel 210 of the cold plate 21 shown is only a schematic diagram and does not limit the specific structure of the channel 210 .

[0120] The following FIG. 4A to FIG. 7B The different structures of the channel 210 are described in detail to make the meaning of the manifold 2104 of the channel 210 in the embodiment of the present application clearer, as well as the relative positional relationship between the multiple flow channels 2103 of the channel 210 and the manifold 2104. It should be noted that: FIG. 4A to FIG. 7B Shown is a simplified structural diagram of the channel 210 .

[0121] In some embodiments, see Figure 4A and Figure 4BThe collecting chamber 2104 includes a first collecting chamber 21041 and a second collecting chamber 21042. The first collecting chamber 21041 and the second collecting chamber 21042 are respectively located at the two ends of the multiple flow channels 2103 in the first direction X. One end of the multiple flow channels 2103 in the first direction X is connected to the cooling medium inlet 2101 through the first collecting chamber 21041, and the other end of the multiple flow channels 2103 in the first direction X is connected to the cooling medium outlet 2102 through the second collecting chamber 21042.

[0122] Figure 4B The approximate flow direction of the cooling medium in the first manifold 21041 , the second manifold 21042 , and the plurality of flow channels 2103 is shown.

[0123] In this embodiment, the flow direction of the cooling medium in the multiple flow channels 2103 is the same, and the cooling medium flows from one end to the other end of the multiple flow channels 2103. If the cooling medium has different flow directions in the multiple flow channels 2103, the cooling medium needs to be reversed in flow direction, and the resulting water flow noise is greater. If the cooling medium has the same flow direction in the multiple flow channels 2103, the cooling medium does not need to be reversed in flow direction, and the resulting water flow noise is smaller.

[0124] The meaning of flow direction reversal is that, as an example, the two ends of the multiple flow channels 2103 in the first direction X are respectively the first end and the second end, the first end is the end close to the cooling medium inlet 2101, and the second end is the end close to the cooling medium outlet 2102. The cooling medium flows from the first end to the second end in the flow channel 2103, which is the first flow direction of the cooling medium. The cooling medium flows from the second end to the first end in the flow channel 2103, which is the second flow direction of the cooling medium. When the flow direction of the cooling medium switches between the first flow direction and the second flow direction, the flow direction of the cooling medium is reversed.

[0125] In some embodiments, see FIG. 5A to FIG. 7B , the multiple flow channels 2103 include a plurality of first flow channels 21031 and a plurality of second flow channels 21032 arranged in the second direction Y; the collecting chamber 2104 includes a third collecting chamber 21043, and the third collecting chamber 21043 is located at one end of the multiple first flow channels 21031 and the multiple second flow channels 21032 in the first direction X; one end of the multiple first flow channels 21031 in the first direction X is connected to the third collecting chamber 21043, and the other end of the multiple first flow channels 21031 in the first direction X is connected to the cooling medium inlet 2101; one end of the multiple second flow channels 21032 in the first direction X is connected to the third collecting chamber 21043, and the other end of the multiple second flow channels 21032 in the first direction X is connected to the cooling medium inlet 2101.

[0126] The first flow channel 21031 and the second flow channel 21032 refer to two different flow channels with opposite flow directions of the cooling medium, and do not refer to two flow channels with different structures. The structures of the first flow channel 21031 and the second flow channel 21032 can be the same or different.

[0127] In this embodiment, the multiple flow channels 2103 include multiple first flow channels 21031 and multiple second flow channels 21032. Since the flow directions of the cooling medium in the first flow channel 21031 and the second flow channel 21032 are opposite, the flow direction of the cooling medium needs to be reversed when it flows from the first flow channel 21031 to the second flow channel 21032. The third collecting chamber 21043 can converge the first flow channel 21031 and the second flow channel 21032. Therefore, the cooling medium flowing out of the first flow channel 21031 can enter the third collecting chamber 21043, and then enter the second flow channel 21032 after converging through the third collecting chamber 21043, thereby realizing the reversal of the cooling medium direction.

[0128] In this embodiment, the cooling medium has different flow directions in multiple flow channels 2103. If the cooling medium has the same flow direction in multiple flow channels 2103, that is, the cooling medium does not need to be turned, then after the cooling medium enters the channel 210 from the cooling medium inlet 2101, it needs to be diverted to enter each flow channel 2103, which may cause the flow rate of the cooling medium in each flow channel 2103 to be small, and the cooling effect on the battery cell 10 is not good; while in this embodiment, the cooling medium has different flow directions in multiple flow channels 2103, that is, the cooling medium needs to be turned, then after the cooling medium enters the channel 210 from the cooling medium inlet 2101, it only needs to be diverted to enter a part of the flow channels 2103, instead of being diverted to enter each flow channel 2103, so the flow rate of the cooling medium in each flow channel 2103 is larger, so as to improve the cooling effect on the battery cell 10.

[0129] As an example, the manifold 2104 further includes a first manifold 21041 and a second manifold 21042 . The first manifold 21041 is directly connected to the cooling medium inlet 2101 , and the second manifold 21042 is directly connected to the cooling medium outlet 2102 .

[0130] The other ends of the multiple first flow channels 21031 in the first direction X are connected to the cooling medium inlet 2101, which means that the other ends of the multiple first flow channels 21031 in the first direction X can be connected to the cooling medium inlet 2101 through the first collecting cavity 21041; the other ends of the multiple second flow channels 21032 in the first direction X are connected to the cooling medium outlet 2102, which means that the other ends of the multiple second flow channels 21032 in the first direction X are connected to the cooling medium inlet 2101 through the second collecting cavity 21042.

[0131] Various different structures of the channel 210 with the flow direction of the cooling medium reversed are described in detail below.

[0132] See also Figure 5A and Figure 5B , Figure 5A and Figure 5B It shows the situation that the cooling medium enters the channel 210 through the cooling medium inlet 2101 , changes its flow direction once, and then flows out through the cooling medium outlet 2102 .

[0133] Specifically, the adjacent plurality of first flow channels 21031 may be regarded as a first flow channel set, and the adjacent plurality of second flow channels 21032 may be regarded as a second flow channel set. Figure 5A The number of the first flow channel set and the number of the second flow channel set are both one, and one first flow channel set and one second flow channel set are arranged side by side in the second direction Y.

[0134] For example, Figure 5A As shown, a first flow channel set has three first flow channels 21031, and a second flow channel set has three second flow channels 21032.

[0135] The number of the first manifold 21041, the second manifold 21042 and the third manifold 21043 are all one, the first manifold 21041 and the second manifold 21042 are both located at the first end of the first flow channel set and the second flow channel set in the first direction X, the first manifold 21041 and the second manifold 21042 are arranged along the second direction Y, and the third manifold 21043 is located at the second end of the first flow channel set and the second flow channel set in the first direction X. One end of each first flow channel 21031 of the first flow channel set is directly connected to the first manifold 21041, and the other end of each first flow channel 21031 of the first flow channel set is directly connected to the third manifold 21043; one end of each second flow channel 21032 of the second flow channel set is directly connected to the second manifold 21042, and the other end of each second flow channel 21032 of the second flow channel set is directly connected to the third manifold 21043.

[0136] After the cooling medium enters the first collecting chamber 21041 through the cooling medium inlet 2101, it flows through the multiple first flow channels 21031 of the first flow channel collection, and enters the third collecting chamber 21043. After converging in the third collecting chamber 21043, it enters the multiple second flow channels 21032 of the second flow channel collection respectively, thereby reversing the flow direction of the cooling medium. Finally, after converging in the second collecting chamber 21042, it flows out from the cooling medium outlet 2102.

[0137] In this case, the several wave-breaking plates 211 in the manifold 2104 can be set in any position, for example, they can be set in any one or more of the first manifold 21041, the second manifold 21042, and the third manifold 21043.

[0138] Figure 5B The figure shows the approximate flow direction of the cooling medium in the first manifold 21041 , the second manifold 21042 , the third manifold 21043 , the plurality of first flow channels 21031 , and the plurality of second flow channels 21032 when the cooling medium has a flow direction reversal when flowing through the channel 210 .

[0139] In this way, the cooling medium enters the channel 210 through the cooling medium inlet 2101 , is reversed in flow direction, and then flows out through the cooling medium outlet 2102 .

[0140] See also Fig. 6A and Figure 6B , Fig. 6A and Figure 6B It shows the situation that the cooling medium enters the channel 210 through the cooling medium inlet 2101 , changes its flow direction twice, and then flows out through the cooling medium outlet 2102 .

[0141] Specifically, the adjacent plurality of first flow channels 21031 may be regarded as a first flow channel set, and the adjacent plurality of second flow channels 21032 may be regarded as a second flow channel set. Fig. 6A The number of the first flow channel sets is two, the number of the second flow channel sets is one, and the two first flow channel sets and the one second flow channel set are alternately arranged in the second direction Y.

[0142] For example, Fig. 6A As shown, a first flow channel set has three first flow channels 21031, and a second flow channel set has three second flow channels 21032.

[0143] The number of the first collecting chamber 21041 and the number of the second collecting chamber 21042 are both one, and the number of the third collecting chamber 21043 is two. After the cooling medium enters the first collecting chamber 21041 through the cooling medium inlet 2101, it flows through the multiple first flow channels 21031 of the first first flow channel collection, and after converging in the first third collecting chamber 21043, it undergoes the first flow direction change, and then enters the multiple second flow channels 21032 of the second flow channel collection, and after converging in the second third collecting chamber 21043, it undergoes the second flow direction change, and then enters the multiple first flow channels 21031 of the second first flow channel collection, and finally flows out from the cooling medium outlet 2102 after converging in the second collecting chamber 21042.

[0144] In this case, the several wave-breaking plates 211 in the manifold 2104 can be arbitrarily set in any position, for example, they can be selected in any one or more of the first manifold 21041, the second manifold 21042, and the two third manifolds 21043.

[0145] Figure 6B The figure shows the approximate flow directions of the cooling medium in the first manifold 21041 , the second manifold 21042 , the two third manifolds 21043 , the multiple first flow channels 21031 , and the multiple second flow channels 21032 when the cooling medium has two flow direction reversals when flowing through the channel 210 .

[0146] In this way, the cooling medium enters the channel 210 through the cooling medium inlet 2101 and then flows out through the cooling medium outlet 2102 after the flow direction is reversed twice.

[0147] See also Fig. 7A and Figure 7B , Fig. 7A and Figure 7B The figure shows the cooling medium entering the channel 210 and undergoing three flow direction changes.

[0148] Specifically, the adjacent plurality of first flow channels 21031 may be regarded as a first flow channel set, and the adjacent plurality of second flow channels 21032 may be regarded as a second flow channel set. Fig. 7A The number of the first flow channel sets is two, the number of the second flow channel sets is also two, and the two first flow channel sets and the two second flow channel sets are alternately arranged in the second direction Y.

[0149] For example, Fig. 7A As shown, a first flow channel set has three first flow channels 21031, and a second flow channel set has three second flow channels 21032.

[0150] The number of the first collecting chamber 21041 and the number of the second collecting chamber 21042 are both one, and the number of the third collecting chamber 21043 is three. After the cooling medium enters the first collecting chamber 21041 through the cooling medium inlet 2101, it flows through the multiple first flow channels 21031 of the first first flow channel collection, and makes the first flow direction change after converging in the first third collecting chamber 21043, then enters the multiple second flow channels 21032 of the first second flow channel collection, and makes the second flow direction change after converging in the second third collecting chamber 21043, then enters the multiple first flow channels 21031 of the second first flow channel collection, and makes the third flow direction change after converging in the third third collecting chamber 21043, then enters the multiple second flow channels 21032 of the second second flow channel collection, and finally flows out from the cooling medium outlet 2102 after converging in the second collecting chamber 21042.

[0151] In this case, the several wave-breaking plates 211 in the manifold 2104 can be arbitrarily set in any position, for example, they can be selected in any one or more of the first manifold 21041, the second manifold 21042, and the three third manifolds 21043.

[0152] Figure 7B The figure shows the approximate flow directions of the cooling medium in the first manifold 21041 , the second manifold 21042 , the three third manifolds 21043 , the multiple first flow channels 21031 , and the multiple second flow channels 21032 when the cooling medium has three flow direction reversals when flowing through the channel 210 .

[0153] In this way, the cooling medium enters the channel 210 through the cooling medium inlet 2101 and then flows out through the cooling medium outlet 2102 after the flow direction is reversed three times.

[0154] From the above FIG. 5A to FIG. 7B The structure of the channel 210 shown can be reasonably deduced that no matter how many times the flow direction of the cooling medium is reversed after entering the channel 210, the first collecting chamber 21041 and the second collecting chamber 21042 are both one, and the number of the third collecting chambers 21043 is the same as the number of times the flow direction of the cooling medium is reversed after entering the channel 210, and when the number of times the flow direction of the cooling medium is reversed after entering the channel 210 is odd, the first collecting chamber 21041 and the second collecting chamber 21042 are both located at the first end of the multiple flow channels 2103 in the first direction X, and when the number of times the flow direction of the cooling medium is reversed after entering the channel 210 is even, the first collecting chamber 21041 is located at the first end of the multiple flow channels 2103 in the first direction X, and the second collecting chamber 21042 is located at the second end of the multiple flow channels 2103 in the first direction X.

[0155] Of course, since the size of the cold plate 21 in the second direction Y is limited, the number of times the flow direction of the cooling medium is reversed after entering the channel 210 should not be too many. Figure 5A and Figure 5B The shown flow direction is only reversed once.

[0156] As can be seen from the different structures of the above channels 210, in this embodiment, the other end of the plurality of first flow channels 21031 in the first direction X is connected to the cooling medium inlet 2101, which means that the other end of the plurality of first flow channels 21031 in the first direction X can be directly connected to the first manifold 21041 and thus connected to the cooling medium inlet 2101, and the other end of the plurality of first flow channels 21031 in the first direction X can also be connected to the first manifold 21041 through other flow channels 2103, that is, the other end of the plurality of first flow channels 21031 in the first direction X is indirectly connected to the first manifold 21041. The first collecting cavity 21041; the other ends of the multiple second flow channels 21032 in the first direction X are connected to the cooling medium inlet 2101, which means that the other ends of the multiple second flow channels 21032 in the first direction X can be directly connected to the second collecting cavity 21042 and thus connected to the cooling medium outlet 2102, and the other ends of the multiple second flow channels 21032 in the first direction X can also be connected to the second collecting cavity 21042 through other flow channels 2103, that is, the other ends of the multiple second flow channels 21032 in the first direction X are indirectly connected to the second collecting cavity 21042.

[0157] In some embodiments, refer again to Figure 3A and Figure 3B The wave-breaking plate 211 in the flow channel 2103 is arranged at one end of the flow channel 2103 close to the manifold 2104 .

[0158] It can be understood that, in the first direction X, the flow velocity of the cooling medium in the flow channel 2103 is relatively gentle in the middle of the flow channel 2103, and will impact the manifold 2104 at one end of the flow channel 2103 close to the manifold 2104, so the water flow noise near the end is greater. Specifically, the cooling medium flow in the flow channel 2103 impacts the inner wall of the manifold 2104, so the water flow close to one end of the manifold 2104 is relatively turbulent, which is easy to generate water flow noise. The wave-breaking plate 211 is provided at one end of the flow channel 2103 close to the manifold 2104, which can buffer the relatively turbulent water flow in the flow channel 2103 close to the manifold 2104, thereby reducing the water flow noise. In this embodiment, the wave-breaking plate 211 can be set only at one end of the flow channel 2103 close to the collecting cavity 2104, and it is not necessary to set the wave-breaking plate 211 along the entire length direction of the flow channel 2103. Of course, this embodiment does not exclude the situation where the wave-breaking plate 211 is set in the entire flow channel 2103.

[0159] In this embodiment, by setting the wave-breaking plate 211 in the flow channel 2103 at one end of the flow channel 2103 close to the manifold 2104, the water flow noise in the cold plate 21 can be significantly reduced. Of course, in other embodiments, in addition to setting the wave-breaking plate 211 in the flow channel 2103 at one end of the flow channel 2103 close to the manifold 2104 in the above solution, the wave-breaking plate 211 can also be set at other positions in the flow channel 2103, such as the middle of the flow channel 2103 in the first direction X, or other positions.

[0160] In some embodiments, see Figure 8 , Figure 8 yes Figure 3A The schematic diagram of the structure of the cold plate 21 without the wave-breaking plate 211 is as follows: at least one flow channel 2103 has a vortex area 2103A, and at least the flow channel 2103 having the vortex area 2103A is provided with the wave-breaking plate 211.

[0161] The meaning of the eddy zone 2103A means that when the wave-breaking plate 211 is not provided in the cold plate 21, the cooling medium flows from the flow channel 2103 to the manifold 2104, and an eddy phenomenon will be generated in the vicinity of the connection between the flow channel 2103 and the manifold 2104. Therefore, the area where the eddy phenomenon is generated is defined as the eddy zone 2103A. When the wave-breaking plate 211 is provided in the cold plate 21, due to the buffering effect of the wave-breaking plate 211 on the cooling medium, the eddy phenomenon generated by the cooling medium in the vicinity of the connection between the flow channel 2103 and the manifold 2104 (that is, the eddy zone 2103A) is reduced or even disappears.

[0162] The above-mentioned eddy current phenomenon of the cooling medium refers to the phenomenon that when the cooling medium encounters an obstacle, it will bypass the obstacle and form a rotating water flow. The flow direction of the cooling medium in the flow channel 2103 is along the first direction X, and the flow direction in the manifold 2104 is along the second direction Y. Therefore, when the cooling medium flows from the flow channel 2103 to the manifold 2104, or from the manifold 2104 to the flow channel 2103, the flow direction of the cooling medium will change, thereby generating an eddy current phenomenon in the vicinity of the connection between the flow channel 2103 and the manifold 2104.

[0163] Therefore, the term "eddy zone" involved in the embodiment of the present application is only a division of the physical area of ​​the flow channel, and is not used to limit the function of the flow channel 2103 in this area of ​​the embodiment of the present application. The "eddy zone" can be determined by testing the cold plate 21 without the wave-breaking plate 211 or by simulation analysis.

[0164] Among the multiple flow channels 2103, at least one flow channel 2103 will have a vortex area 2103A. The cooling medium will generate a vortex phenomenon in the vortex area 2103A in the flow channel 2103, thereby generating a large water flow noise. A wave-breaking plate 211 is provided in the flow channel 2103 having the vortex area 2103A, which can slow down the water flow in the flow channel 2103 having the vortex area 2103A, thereby reducing the water flow noise.

[0165] In this embodiment, a wave-breaking plate 211 is provided in a flow channel 2103 having at least a vortex zone 2103A. When a part of the multiple flow channels 2103 do not have a vortex zone 2103A, the present application does not exclude the situation where a wave-breaking plate 211 is provided in these flow channels 2103 without a vortex zone 2103A, and the wave-breaking plate 211 may be provided or not provided in these flow channels 2103 without a vortex zone 2103A depending on the situation.

[0166] The eddy current area of ​​the present embodiment can be determined based on a flow simulation diagram when the cooling medium flows through the channel 210 in the cold plate 21 when the cold plate 21 is not provided with the wave-breaking plate 211 .

[0167] In some embodiments, see Fig. 9 , Fig. 9 is a partial enlarged view of another embodiment of the cold plate in the battery device provided by the present application at the anti-wave plate 211, and a plurality of anti-wave plates 211 are respectively fixed in the channel 210; or, please refer to Figure 3A and Figure 3B , multiple wave-breaking plates 211 are fixed to form an integral wave-breaking structure through fixing elements 212, and the integral wave-breaking structure is fixed in the channel 210, see Fig.10 , Fig.10 It is a three-dimensional schematic diagram of the overall wave-breaking structure.

[0168] In this embodiment, there are multiple ways to fix several wave-breaking plates 211 in the channel 210: when several wave-breaking plates 211 are each fixed in the channel 210, the installation of each wave-breaking plate 211 does not affect each other, and the structure is simpler; when multiple wave-breaking plates 211 are fixed into an integral wave-breaking structure through fixing elements 212, the integral wave-breaking structure can be installed as a whole in the channel 210 without having to fix and install individual wave-breaking plates 211 one by one, so the installation is quicker and more convenient.

[0169] In some embodiments, when a plurality of wave-breaking plates 211 are fixed to form an integral wave-breaking structure by means of fixing elements 212, the integral wave-breaking structure is fixed in the channel 210. Fig.10The fixing element 212 includes a first fixing member 2121 and a second fixing member 2122 which are arranged at intervals. One end of the plurality of wave-breaking plates 211 of the overall wave-breaking structure is fixed by the first fixing member 2121 , and the other end is fixed by the second fixing member 2122 .

[0170] In this embodiment, the plurality of wave-breaking plates 211 of the overall wave-breaking structure are fixed by the first fixing member 2121 and the second fixing member 2122, so that the overall wave-breaking structure can form a frame structure that is stable and not easily deformed.

[0171] In some embodiments, see Fig.11A and Fig. 11B , Fig.11A 1 is a schematic structural diagram of an embodiment of an integral wave-proof structure. Fig. 11B yes Fig.11A The side view of the overall wave-breaking structure, the first fixing member 2121 includes a first fixing plate 21211, the second fixing member 2122 includes a second fixing plate 21221, and the multiple wave-breaking plates 211 of the overall wave-breaking structure are fixed between the first fixing plate 21211 and the second fixing plate 21221.

[0172] In this embodiment, the first fixing member 2121 and the second fixing member 2122 are both single-plate structures, which is one of the structures of the first fixing member 2121 and the second fixing member 2122. The structure of the first fixing member 2121 and the second fixing member 2122 is simpler, and the fixing of multiple wave-breaking plates 211 between the first fixing member 2121 and the second fixing member 2122 is also more convenient.

[0173] In some embodiments, see Fig. 12A and Fig. 12B , Fig. 12A is a structural schematic diagram of another embodiment of the overall wave-proof structure, Fig. 12B yes Fig. 12A The side view of the overall wave-breaking structure, the first fixing member 2121 includes a plurality of first connecting plates 21212, the second fixing member 2122 includes a plurality of second connecting plates 21222, and every two adjacent wave-breaking plates 211 of the overall wave-breaking structure are connected by a first connecting plate 21212 and a second connecting plate 21222.

[0174] In this embodiment, the first fixing member 2121 and the second fixing member 2122 are both structures of multiple plates, which is another structure of the first fixing member 2121 and the second fixing member 2122. The first fixing member 2121 and the second fixing member 2122 will not increase the size of the cross-section of the overall wave-breaking structure.

[0175] In some embodiments, the first fixing member 2121 and the second fixing member 2122 in the flow channel 2103 extend along the first direction X, and the first fixing member 2121 and the second fixing member 2122 are respectively attached to and fixed on two opposite side walls of the flow channel 2103; in this way, the first fixing member 2121 and the second fixing member 2122 will not hinder the flow of the cooling medium in the flow channel 2103.

[0176] The first fixing member 2121 and the second fixing member 2122 in the collecting cavity 2104 extend along the second direction Y, and the first fixing member 2121 and the second fixing member 2122 are respectively abutted against and fixed to two opposite top walls and bottom walls of the collecting cavity 2104; in this way, the first fixing member 2121 and the second fixing member 2122 will not hinder the flow of the cooling medium in the collecting cavity 2104, and the first fixing member 2121 and the second fixing member 2122 will not hinder the flow of the cooling medium in the flow channel 2103 into the collecting cavity 2104.

[0177] In some embodiments, the openings 2110 on adjacent wave-breaking plates 211 in the flow channel 2103 are staggered in the first direction X, so that the flow speed of the cooling medium in the flow channel 2103 can be further slowed down, thereby slowing down the shaking of the cooling medium in the flow channel 2103; and / or, the openings 2110 on adjacent wave-breaking plates 211 in the manifold 2104 are staggered in the second direction Y, so that the flow speed of the cooling medium in the manifold 2104 can be further slowed down, thereby slowing down the shaking of the cooling medium in the manifold 2104.

[0178] In some embodiments, the opening 2110 includes a through hole disposed on the wave-breaking plate 211 ; and / or, the opening 2110 includes a notch disposed on an edge of the wave-breaking plate 211 .

[0179] In this embodiment, the opening 2110 on the wave-breaking plate 211 can be formed in a variety of ways. When the opening 2110 includes a through hole arranged on the wave-breaking plate 211, that is, the opening 2110 is arranged on the inner side of the edge of the wave-breaking plate 211, the opening 2110 will not affect the fixed installation of the edge of the wave-breaking plate 211 in the channel 210; when the opening 2110 includes a notch arranged on the edge of the wave-breaking plate 211, that is, the opening 2110 is arranged on the edge of the wave-breaking plate 211, the openings 2110 on adjacent wave-breaking plates 211 are more easily staggered.

[0180] In some embodiments, the wave-breaking plate 211 is a flat plate, a folding plate or a curved plate. The wave-breaking plate can have various shapes. When the wave-breaking plate 211 is a flat plate, its structure is simpler. When the wave-breaking plate 211 is a folding plate, the contact area between the cooling medium and the wave-breaking plate 211 is larger, and the cooling effect is better. When the wave-breaking plate 211 is a curved plate, the contact area between the cooling medium and the wave-breaking plate 211 is larger and the cooling medium has less resistance when flowing through the curved plate.

[0181] In addition, the placement angle of the wave-breaking plate 211 in the flow channel 2103 relative to the first direction X can also be various. Taking the wave-breaking plate 211 as a flat plate as an example, the wave-breaking plate 211 can be perpendicular to the first direction X, or can be inclined relative to the first direction X, as long as it is not parallel to the first direction X and can enable several wave-breaking plates 211 in the flow channel 2103 to divide the flow channel 2103 into several chambers 2100 along the first direction X.

[0182] The placement angle of the wave-breaking plate 211 in the collecting cavity 2104 relative to the second direction Y can also be various. Taking the wave-breaking plate 211 as a flat plate as an example, the wave-breaking plate 211 can be perpendicular to the second direction Y, and can also be inclined relative to the second direction Y, as long as it is not parallel to the second direction Y and can make several wave-breaking plates 211 in the collecting cavity 2104 divide the collecting cavity 2104 into several chambers 2100 along the second direction Y.

[0183] Moreover, the shape of the wave-breaking plate 211 in the flow channel 2103 can be adapted to the shape of the cross-section of the flow channel 2103, and the cross-section of the flow channel 2103 refers to the cross-section perpendicular to the first direction X; the shape of the wave-breaking plate 211 in the manifold 2104 can be adapted to the shape of the cross-section of the manifold 2104, and the cross-section of the manifold 2104 refers to the cross-section perpendicular to the second direction Y.

[0184] In some embodiments, refer again to Figure 3C and Figure 3D A plurality of ribs 21030 extending along the first direction X are provided in the cold plate 21, and the plurality of ribs 21030 are arranged at intervals along the second direction Y. The cavity in the cold plate 21 is formed into a plurality of flow channels 2103 by the plurality of ribs 21030; a plurality of wave-breaking plates 211 in the manifold 2104 are connected to the plurality of ribs 21030 in a one-to-one correspondence, so that the plurality of chambers 2100 in the manifold 2104 are connected to the plurality of flow channels 2103 in a one-to-one correspondence.

[0185] In this way, after the cooling medium in the flow channel 2103 flows into the manifold 2104, the cooling medium in one flow channel 2103 just corresponds to entering a small chamber 2100 of the manifold 2104, which has a better effect of reducing water flow noise.

[0186] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0187] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Multiple battery cells; A box body having a receiving cavity, wherein a plurality of battery cells are received in the receiving cavity; The box body includes a cold plate, and the cold plate is close to the battery cell to cool the battery cell; A channel for cooling medium to flow through is formed inside the cold plate, and the channel has a cooling medium inlet and a cooling medium outlet, a plurality of wave-breaking plates are arranged in the channel, and the plurality of wave-breaking plates divide the channel into a plurality of chambers along the extension direction of the channel, and the wave-breaking plates are provided with openings for connecting adjacent chambers; The cold plate is defined with a first direction and a second direction perpendicular to each other, and the first direction and the second direction are both perpendicular to the thickness direction of the cold plate; The channel includes a plurality of flow channels extending along the first direction and a manifold located at the ends of the plurality of flow channels in the first direction, the plurality of flow channels are arranged along the second direction, the manifold extends along the second direction, and the manifold is used to connect at least two of the flow channels; The wave-breaking plate is arranged in the flow channel, and / or the wave-breaking plate is arranged in the manifold.

2. The battery device according to claim 1, characterized in that: The wave-breaking plate in the flow channel is arranged at one end of the flow channel close to the manifold.

3. The battery device according to claim 1, characterized in that: At least one of the flow channels has a vortex area, and the wave-breaking plate is arranged in at least the flow channel having the vortex area.

4. The battery device according to claim 1, characterized in that: A plurality of the wave-breaking plates are respectively fixed in the channel; or, a plurality of the wave-breaking plates are fixed into an integral wave-breaking structure by means of fixing elements, and the integral wave-breaking structure is fixed in the channel.

5. The battery device according to claim 4, characterized in that: A plurality of the wave-breaking plates are fixed into an integral wave-breaking structure through the fixing element, and the integral wave-breaking structure is fixed in the cold plate; The fixing element comprises a first fixing member and a second fixing member which are arranged at intervals, and one end of the plurality of wave-breaking plates of the integral wave-breaking structure is fixed by the first fixing member, and the other end is fixed by the second fixing member.

6. The battery device according to claim 5, characterized in that: The first fixing member includes a first fixing plate, the second fixing member includes a second fixing plate, and the plurality of wave-breaking plates of the integral wave-breaking structure are fixed between the first fixing plate and the second fixing plate; Alternatively, the first fixing member includes a plurality of first connecting plates, the second fixing member includes a plurality of second connecting plates, and every two adjacent wave-breaking plates of the integral wave-breaking structure are connected via a first connecting plate and a second connecting plate.

7. The battery device according to claim 5, characterized in that: The first fixing member and the second fixing member in the flow channel extend along the first direction, and the first fixing member and the second fixing member are respectively attached to and fixed on two opposite side walls of the flow channel; The first fixing member and the second fixing member in the manifold extend along the second direction, and the first fixing member and the second fixing member are respectively abutted against and fixed to two opposite top walls and bottom walls of the manifold.

8. The battery device according to claim 1, characterized in that: The openings on the adjacent wave-breaking plates in the flow channel are staggered in the first direction; And / or, the openings on adjacent wave-breaking plates in the manifold are staggered in the second direction.

9. The battery device according to any one of claims 1 to 8, characterized in that: The opening comprises a through hole arranged on the anti-wave plate; and / or the opening comprises a notch arranged on the edge of the anti-wave plate.

10. The battery device according to any one of claims 1 to 8, characterized in that: The wave-breaking plate is a flat plate, a folded plate or a curved plate.

11. The battery device according to claim 1, characterized in that: The cold plate is provided with a plurality of ribs extending along the first direction, the plurality of ribs are arranged at intervals along the second direction, and the cavity in the cold plate is formed into a plurality of the flow channels by the plurality of ribs; The plurality of wave-breaking plates in the manifold are connected to the plurality of ribs in a one-to-one correspondence, so that the plurality of chambers in the manifold are connected to the plurality of flow channels in a one-to-one correspondence.

12. The battery device according to claim 1, characterized in that: The collecting chamber includes a first collecting chamber and a second collecting chamber, the first collecting chamber and the second collecting chamber are respectively located at the two ends of the multiple flow channels in the first direction, one end of the multiple flow channels in the first direction is connected to the cooling medium inlet through the first collecting chamber, and the other end of the multiple flow channels in the first direction is connected to the cooling medium outlet through the second collecting chamber.

13. The battery device according to claim 1, characterized in that: The plurality of flow channels include a plurality of first flow channels and a plurality of second flow channels arranged in the second direction; The manifold comprises a third manifold, and the third manifold is located at one end of the plurality of first flow channels and the plurality of second flow channels in the first direction; One end of the plurality of first flow channels in the first direction is connected to the third manifold, and the other end of the plurality of first flow channels in the first direction is connected to the cooling medium inlet; One end of the plurality of second flow channels in the first direction is connected to the third manifold, and the other end of the plurality of second flow channels in the first direction is connected to the cooling medium inlet.

14. An electrical device, characterized in that: The battery device comprises the battery device described in any one of claims 1 to 13, wherein the battery device is used to provide electrical energy to the electrical equipment.

15. A box, characterized in that: A cold plate is provided, wherein a channel for a cooling medium to flow through is formed inside the cold plate, and the channel has a cooling medium inlet and a cooling medium outlet, a plurality of wave-breaking plates are provided in the channel, and the plurality of wave-breaking plates divide the channel into a plurality of chambers along the extension direction of the channel, and the wave-breaking plates are provided with openings for connecting adjacent chambers; The cold plate is defined with a first direction and a second direction perpendicular to each other, and the first direction and the second direction are both perpendicular to the thickness direction of the cold plate; The channel includes a plurality of flow channels extending along the first direction and a manifold located at the ends of the plurality of flow channels in the first direction, the plurality of flow channels are arranged along the second direction, the manifold extends along the second direction, and the manifold is used to connect at least two of the flow channels; The wave-breaking plate is arranged in the flow channel, and / or the wave-breaking plate is arranged in the manifold.

Images