Battery devices and electrical equipment

Abstract

The present application discloses a battery device and an electric device, the battery device comprises: a box, a battery cell assembly, a heat exchanger and a flow guide, the box comprises a liquid inlet structure, the liquid inlet structure is a liquid inlet hole, the battery cell assembly is arranged on the box, the battery cell assembly comprises at least one battery cell, the heat exchanger is arranged on the box, the heat exchanger comprises at least two medium flow channels, the flow guide comprises a receiving chamber, a liquid inlet and a plurality of liquid outlets, the flow guide is provided with a plug connector, the liquid inlet is arranged on the plug connector, the plug connector is plugged into the liquid inlet hole, the liquid inlet is connected with the receiving chamber, each medium flow channel is connected with the receiving chamber through a corresponding liquid outlet, a flow guide structure comprising a flow guide surface is arranged in the receiving chamber, the flow guide structure is arranged between the liquid inlet and the plurality of liquid outlets, the flow guide surface is inclined to the side away from the liquid inlet and is used to guide the heat exchange medium from the liquid inlet to the plurality of liquid outlets. The coolant will flow along the flow guide surface to reduce the abnormal noise caused by the impact of the coolant.

Description

Technical Field

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

[0002] With the development of new energy, more and more fields are using new energy as a power source. Due to its advantages such as high energy density, rechargeable, safe and environmentally friendly, battery devices are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0003] In the related art, the battery device includes a box, a heat exchanger with a flow channel, and a plurality of battery cells. The plurality of battery cells and the heat exchanger are respectively arranged in the box, and the heat exchanger exchanges heat for the plurality of battery cells by circulating coolant. However, when the coolant flows into the heat exchanger, an abnormal sound is generated, thereby affecting the use of the user. Summary of the invention

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which solves the problem of abnormal noise generated when the coolant flows into the flow channel of the heat exchange component.

[0005] A first aspect of the present application provides a battery device, the battery device comprising:

[0006] The box body includes a liquid inlet structure, the liquid inlet structure is a liquid inlet hole, and the liquid inlet structure is used for external coolant to flow in;

[0007] A battery cell assembly, the battery cell assembly is arranged in the box, and the battery cell assembly includes at least one battery cell;

[0008] A heat exchanger, which is arranged in the box and used to exchange heat for the battery cells, and includes at least two medium flow channels for the heat exchange medium to flow;

[0009] A flow guide member, the flow guide member includes a accommodating chamber, a liquid inlet and multiple liquid outlets, a plug connector is provided on the flow guide member, the liquid inlet is opened on the plug connector, the plug connector is plugged into the liquid inlet hole, the liquid inlet is connected to the accommodating chamber and is used for external heat exchange medium to flow in, each medium flow channel is connected to the accommodating chamber through a corresponding liquid outlet, a flow guide structure including a flow guide surface is provided in the accommodating chamber, the flow guide structure is arranged between the liquid inlet and the multiple liquid outlets, the flow guide surface is inclined to the side away from the liquid inlet and is used to guide the heat exchange medium from the liquid inlet to the multiple liquid outlets.

[0010] In the present application, after the coolant enters the receiving cavity of the guide member through the liquid inlet, the coolant is guided by the guide surface of the guide structure, and under the guidance of the guide surface, it flows to the liquid outlet, and flows into the medium channel of the heat exchanger through the liquid outlet. Since the guide surface is inclined to the side away from the liquid inlet, the inclination direction of the guide member is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet reaches the position of the guide surface, the coolant will flow along the inclination direction of the guide surface, thereby reducing the abnormal sound caused by the impact of the coolant. At the same time, under the guidance of the guide surface, the flow rate of the coolant can be slowed down, thereby reducing the abnormal sound generated when the coolant enters the medium channel of the heat exchanger.

[0011] In some embodiments of the present application, the flow guiding structure is a rib plate disposed in the accommodating cavity, and the side of the rib plate facing the liquid inlet forms a flow guiding surface. Such a configuration is convenient for processing, can effectively shorten the processing time, and thus speed up the production cycle.

[0012] In some embodiments of the present application, the guide surface is a plane or a curved surface. Specifically, when the guide surface is a plane, the convenience of processing can be improved, so that the production cycle is accelerated, and when the guide surface is a curved surface, the flow rate of the coolant can be further reduced, so that the abnormal noise generated during the coolant inflow process is further reduced.

[0013] In some embodiments of the present application, the guide surface is a plane, and the inclination angle of the plane is greater than 90 degrees and less than 180 degrees. Such a configuration enables the guide surface to fully guide the coolant, thereby reducing the flow rate of the coolant, so that the situation of abnormal noise caused by the inflow of coolant is further reduced.

[0014] In some embodiments of the present application, the inclination angle of the plane is greater than or equal to 100 degrees and less than or equal to 145 degrees. This arrangement can maximize the effect of the guide surface on guiding the coolant, thereby further reducing the situation where abnormal noise is generated by the inflow of coolant.

[0015] In some embodiments of the present application, the connection between the rib plate and the inner wall of the accommodating cavity includes bonding, welding, connection via a connector, or integral molding. Such a configuration effectively meets the needs of the processing process, thereby improving the convenience of processing and speeding up the production rhythm.

[0016] In some embodiments of the present application, the flow guiding structure divides the accommodating chamber into a first chamber and a second chamber, the liquid inlet is connected to the first chamber, and the plurality of liquid outlets are connected to the second chamber. At least one communication hole is provided on the flow guiding structure, and the first chamber is connected to the second chamber through the at least one communication hole.

[0017] The liquid inlet has a first projection on the guide surface, and the first projection is spaced apart from the connecting hole.

[0018] Such an arrangement can extend the flow path of the coolant, so that the flow rate of the coolant can be further reduced, thereby reducing the abnormal noise caused by the impact due to the high flow rate of the coolant.

[0019] In some embodiments of the present application, there are multiple connecting holes, and at least one isolation structure is provided in the second chamber, which divides the second chamber into multiple chamber parts. The multiple chamber parts are arranged in sequence along a first direction, and each chamber part is connected to the first chamber through at least one connecting hole, wherein the first direction intersects with the arrangement direction of the first chamber and the second chamber.

[0020] Such an arrangement can make the coolant flow into the medium flow channel of the heat exchange element more uniform, thereby improving the heat exchange effect of the heat exchange element on the battery cell assembly.

[0021] In some embodiments of the present application, the liquid outlet has a second projection on the flow guiding structure;

[0022] The second projection and the connecting hole are spaced apart from each other, or the second projection and the connecting hole are partially overlapped with each other.

[0023] Such a configuration can increase the flow path of the coolant, so that the flow rate of the coolant is further reduced, thereby further reducing the abnormal noise problem generated during the flow of the coolant, and at the same time can improve the uniformity of the medium flow channel of the coolant flowing into the heat exchange element, further improving the heat exchange effect of the heat exchange element on the battery cell assembly.

[0024] In some embodiments of the present application, each chamber portion includes a communication hole, and each chamber portion includes a plurality of liquid outlets;

[0025] Among them, among the two adjacent liquid outlets, the opening area of ​​the one liquid outlet close to the connecting hole along the first direction is the first area, and the opening area of ​​the other liquid outlet away from the connecting hole along the first direction is the second area, and the second area is larger than the first area.

[0026] Such an arrangement can further improve the uniformity of the coolant flowing into the medium channel of the heat exchange element through the liquid outlet, thereby further improving the heat exchange effect of the heat exchange element on the battery cell assembly.

[0027] In some embodiments of the present application, the isolation structure is a sheet-like structure, and the connection between the isolation structure and the inner wall of the second chamber includes bonding, welding, connection via a connector, or integral molding.

[0028] Such a setting effectively meets the needs of the processing process, thereby improving the convenience of processing and speeding up the production rhythm.

[0029] In some embodiments of the present application, the connecting hole is a circular hole, an elliptical hole or a polygonal hole. In this way, the shape of the connecting hole can be set according to different requirements, thereby meeting the use requirements of the battery device.

[0030] In some embodiments of the present application, a receiving structure is provided on the heat exchange member, and at least part of the flow guide member is embedded and installed in the receiving structure. Such a configuration can make the assembled structure compact, reduce the occupation of the internal space of the box, thereby improving the space utilization of the box, and further increasing the energy density of the battery device.

[0031] In some embodiments of the present application, the guide member is fixed in the receiving structure by bonding, clamping, welding or connecting with a connector. Such a configuration effectively meets the needs of the processing process, thereby improving the convenience of processing and further speeding up the production rhythm.

[0032] In some embodiments of the present application, the battery device further includes a first sealing structure, which is disposed between the plug connector and the liquid inlet and seals the plug connector and the liquid inlet. This arrangement can improve the sealing performance of the connection position and reduce the occurrence of coolant leakage.

[0033] In some embodiments of the present application, the first sealing structure is a sealing ring or a sealing glue. In this way, the first sealing structure can be configured according to different requirements, thereby meeting the use requirements of the battery device.

[0034] In some embodiments of the present application, the battery device further includes a second sealing structure, which is disposed between the flow guide and the box body and seals the flow guide and the box body. This arrangement can improve the sealing performance of the connection position and reduce the leakage of the coolant.

[0035] In some embodiments of the present application, the second sealing structure is a sealant or a sealing sheet. In this way, the second sealing structure can be configured according to different requirements, thereby meeting the use requirements of the battery device.

[0036] In some embodiments of the present application, the second sealing structure is a sealing sheet, which is fixed between the box body and the flow guide by bonding or welding. Such a configuration can increase the strength of the sealing position and further improve the sealing performance of the sealing position.

[0037] A second aspect of the present application provides an electrical device, which includes the battery device as described above.

[0038] In the battery device of the electric device, after the coolant enters the receiving cavity of the guide member through the liquid inlet, the coolant is guided by the guide surface of the guide structure, and flows to the liquid outlet under the guidance of the guide surface, and flows into the medium channel of the heat exchange member through the liquid outlet. Since the guide surface is inclined to the side away from the liquid inlet, the inclination direction of the guide member is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet reaches the position of the guide surface, the coolant will flow along the inclination direction of the guide surface to reduce the abnormal sound caused by the impact of the coolant. At the same time, under the guidance of the guide surface, the flow rate of the coolant can be slowed down, thereby reducing the abnormal sound generated when the coolant enters the medium channel of the heat exchange member.

[0039] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application is shown schematically;

[0041] Figure 2 Schematically shows a structural diagram of a battery device according to an embodiment of the present application;

[0042] Figure 3 A partial structural diagram of a battery device according to an embodiment of the present application is schematically shown;

[0043] Figure 4 for Figure 3 A schematic structural diagram of the battery device from another perspective shown in ;

[0044] Figure 5 for Figure 4 A cross-sectional view of the AA position of the battery device shown in FIG.

[0045] Figure 6 for Figure 5 The enlarged structural diagram of part B in the structure shown;

[0046] Figure 7 for Figure 3 A schematic diagram of the exploded structure of the battery device shown in;

[0047] Figure 8 for Figure 7 A schematic structural diagram of a first frame body of a box in the battery device shown in ;

[0048] Fig. 9 for Figure 7A partial structural schematic diagram of the battery device shown in (showing the heat exchange member and partial structure of the box);

[0049] Fig.10 for Figure 7 A partial structural schematic diagram of the battery device shown in (showing the flow guide, the second sealing structure, the heat exchange member and a partial structure of the box);

[0050] Fig.11 for Fig.10 The structure shown in is a schematic diagram of the structure of some embodiments;

[0051] Fig.12 for Fig.11 The enlarged structural diagram of the C part of the structure shown;

[0052] Fig.13 for Fig.10 The structure shown in is a schematic diagram of the structure of some embodiments;

[0053] Fig.14 for Fig.11 The structure shown is a schematic diagram of the enlarged structure of the D part;

[0054] Fig.15 for Figure 7 A schematic diagram of the structure of the guide member shown in ;

[0055] Fig.16 for Fig.15 A cross-sectional view of the EE position of the guide member shown in FIG. 1 (the thick black arrow line in the figure indicates the inflow direction of the coolant);

[0056] Fig.17 for Fig.15 A schematic structural diagram of the guide member from another perspective shown in FIG.

[0057] Fig.18 for Fig.15 A perspective view of the flow guide shown in FIG.

[0058] The reference numerals are as follows:

[0059] 1000. Vehicles;

[0060] 100, battery device; 200, controller; 300, motor;

[0061] 110. Battery monomer assembly;

[0062] 10. Battery cells;

[0063] 120, box body;

[0064] 121, first box body; 122, second box body; 1221, liquid inlet connector; 1222, first frame; 1223, liquid inlet structure;

[0065] 20. Heat exchange parts;

[0066] 21. Accommodation structure; 22. Medium flow channel;

[0067] 30. Flow guide;

[0068] 31. plug connector; 32. flow guiding structure; 321. flow guiding surface; 33. liquid inlet; 34. accommodating chamber; 341. first chamber; 342. second chamber; 3421. chamber portion; 35. liquid outlet; 36. isolation structure; 37. communicating hole;

[0069] 40. A second sealing structure.

[0070] X, first direction; Y, second direction; a, tilt angle. DETAILED DESCRIPTION

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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).

[0077] 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, and 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.

[0078] 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 ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0079] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices 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 battery devices, the market demand is also constantly expanding.

[0080] In the related art, the battery device includes a box, a heat exchanger with a flow channel and a plurality of battery cells. The plurality of battery cells and the heat exchanger are respectively arranged in the box, and the heat exchanger exchanges heat for the plurality of battery cells by circulating coolant. However, when the coolant flows into the heat exchanger, an abnormal sound is generated, thereby affecting the use of the user.

[0081] In the present application, the battery device includes a box body, a battery cell assembly, a heat exchange member and a flow guide member, the box body includes a liquid inlet structure, the liquid inlet structure is a liquid inlet hole, the liquid inlet structure is for external cooling liquid to flow in, the battery cell assembly is arranged in the box body, the battery cell assembly includes at least one battery cell, the heat exchange member is arranged in the box body and is used to exchange heat for the battery cell, the heat exchange member includes at least two medium flow channels, the medium flow channels are for heat exchange medium to flow, the flow guide member includes a accommodating chamber, a liquid inlet and a plurality of liquid outlets, a plug connector is provided on the flow guide member, the liquid inlet is opened on the plug connector, the plug connector is plugged into the liquid inlet hole, the liquid inlet is connected with the accommodating chamber and is for external heat exchange medium to flow in, each medium flow channel is connected with the accommodating chamber through a corresponding liquid outlet, a flow guide structure including a flow guide surface is provided in the accommodating chamber, the flow guide structure is arranged between the liquid inlet and the plurality of liquid outlets, the flow guide surface is inclined to the side away from the liquid inlet and is used to guide the heat exchange medium from the liquid inlet to the plurality of liquid outlets. After the coolant enters the receiving cavity of the guide member through the liquid inlet, the coolant is guided by the guide surface of the guide structure, and flows to the liquid outlet under the guidance of the guide surface, and flows into the medium channel of the heat exchanger through the liquid outlet. Since the guide surface is inclined to the side away from the liquid inlet, the inclination direction of the guide member is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet reaches the position of the guide surface, the coolant will flow along the inclination direction of the guide surface to reduce the abnormal sound caused by the impact of the coolant. At the same time, under the guidance of the guide surface, the flow rate of the coolant can be slowed down, thereby reducing the abnormal sound generated when the coolant enters the medium channel of the heat exchanger.

[0082] The technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0083] For example, Figure 1 As shown, it is a structural schematic diagram of a vehicle of one embodiment of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 300, a controller 200 and a battery device 100 can be arranged inside the vehicle, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 can be arranged at the bottom, front or rear of the vehicle. The battery device 100 can be used to power the vehicle. For example, the battery device 100 can be used as an operating power source for the vehicle, for the circuit system of the vehicle, for example, for the working power requirements during the start-up, navigation and operation of the vehicle. In another embodiment of the present application, the battery device 100 can not only be used as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0084] The battery apparatus 100 mentioned in the embodiment of the present application may include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 may include a plurality of battery cells 10, and the plurality of battery cells 10 are connected in series, in parallel or in mixed connection through a busbar component.

[0085] In some embodiments, a battery cell assembly 110 (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 10 .

[0086] As an example, the battery cell assembly 110 may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 10 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 10 by a cable tie.

[0087] In some embodiments, Figure 2 As shown, the battery device 100 may be a battery pack, which includes a case 120 and one or more battery cell assemblies 110 , wherein the battery cell assemblies 110 are accommodated in the case 120 .

[0088] As an example, the battery cell assembly 110 may be a battery module, and the battery cell assembly 110 may be accommodated in the case 120 by fixing the battery module in the case 120 .

[0089] As an example, the battery cell assembly 110 may also be accommodated in the case 120 by directly fixing the plurality of battery cells 10 to the case 120 .

[0090] As an example, the box 120 may include a first box 121 and a second box 122. The first box 121 and the second box 122 are buckled together to form a closed space inside the box 120 to accommodate the battery cell assembly 110. The closed space here means covered or closed, which may be sealed or unsealed. The first box 121 may be a top cover or a bottom plate.

[0091] As an example, the box body 120 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 120 to accommodate the battery cell assembly 110.

[0092] In some embodiments, the box 120 can be used as a part of the chassis structure of the vehicle. For example, part of the box 120 can become at least a part of the floor of the vehicle, or part of the box 120 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0093] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells 10, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0094] In some embodiments of the present application, the battery cell 10 may be a secondary battery. A secondary battery refers to a battery cell 10 that can be continuously used by activating active materials by charging after the battery cell 10 is discharged.

[0095] 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 embodiments of the present application.

[0096] In some embodiments of the present application, the battery cell 10 includes a shell, a pressure relief mechanism, an electrode assembly and an insulating member. The shell includes multiple side walls, including a first side wall. The pressure relief mechanism is provided on the first side wall. The pressure relief mechanism is configured to open or close according to whether the internal pressure of the shell reaches a pressure threshold. The electrode assembly is arranged inside the shell, and the insulating member is arranged inside the shell and between the shell and the electrode assembly for insulating and isolating the shell and the electrode assembly. The insulating member abuts against the electrode assembly.

[0097] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present application.

[0098] The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0099] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0100] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0101] As an example, the positive electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0102] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.8 Co 0.15 Al 0.05O2) and at least one of its modified compounds. The modified compound refers to a substance obtained by modifying the above substances by means of doping or coating.

[0103] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a foamed nickel, a foamed copper, a foamed aluminum, a foamed alloy, or a foamed carbon. When the foamed metal is used as the positive electrode, the positive electrode active material may not be disposed on the surface of the foamed metal, but of course, the positive electrode active material may also be disposed. As an example, the positive electrode active material is filled or / and deposited in the foamed metal.

[0104] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0105] As an example, the negative electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0106] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0107] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0108] As an example, the negative electrode active material may adopt the negative electrode active material for the battery cell 10 known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for the battery cell 10 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0109] In some embodiments, the negative electrode may be a foam metal. The foam metal may be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the negative electrode sheet, the surface of the foam metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.

[0110] As an example, a negative electrode active material may be filled and / or deposited in the negative electrode current collector.

[0111] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0112] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0113] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0114] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be coated on the surface of the separator.

[0115] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0116] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0117] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0118] In some embodiments, the electrode assembly is a laminate structure.

[0119] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0120] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0121] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0122] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0123] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0124] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0125] In some embodiments, the electrode sheet of the electrode assembly is provided with a tab, which can lead current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0126] In some embodiments, a pressure relief mechanism is disposed on the housing to discharge the internal gas of the battery cell 10 .

[0127] As an example, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell 10.

[0128] As an example, the pressure relief mechanism may be integrally formed with the housing.

[0129] As an example, the pressure relief mechanism may also be separately provided and connected to the housing.

[0130] The "actuation" mentioned in this application means that the pressure relief mechanism is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 10 can be released. The action produced by the pressure relief mechanism may include but is not limited to: the components in the pressure relief mechanism move to form an exhaust channel, at least a part of the pressure relief mechanism ruptures, breaks, is torn or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell 10 will be discharged from the actuated part as emissions. In this way, the battery cell 10 can be depressurized and cooled under controllable pressure or temperature, thereby reducing the potential for more serious accidents.

[0131] In some embodiments, when the outer shell is a non-sealed structure, the pressure relief mechanism can be set as a through hole to discharge the gas inside the battery cell 10.

[0132] The emissions from the battery cells 10 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

[0133] The positive electrode tab and the negative electrode tab can be led out from the same end of the electrode sheet, or can be led out from opposite ends of the electrode sheet respectively.

[0134] The structures of the positive electrode tab and the negative electrode tab may be the same or different. Taking the positive electrode tab as an example, the positive electrode tab may include multiple positive electrode tab layers, and multiple positive electrode tab layers are stacked together to form the positive electrode tab. The positive electrode tab may include at least two parts, one part is located between the main body of the pole piece and the insulating member, and the other part is located between the insulating member and the electrode lead-out member.

[0135] The insulating member can insulate at least part of the pole ear from the end face of the main body, thereby reducing the risk of the pole ear being inserted into the main body when the battery cell 10 is affected by external impact, vibration, etc., thereby reducing the risk of short circuit of the battery cell 10, which is beneficial to improving the reliability of the battery cell 10.

[0136] The insulating member may be an integral structure or a split structure. As an example, the insulating member is formed by connecting a plurality of independently formed parts. As another example, the insulating member is integrally formed by stamping.

[0137] For example, the insulating part is a plastic part, and the insulating part which is a plastic part is integrally formed by injection molding. The processing of the plastic part is convenient, and the manufacturing cost of the plastic part is low.

[0138] In some embodiments of the present application, the housing includes a shell and an end cover, the shell has an opening, the end cover is connected to the shell and closes the opening, the end cover constitutes a first side wall, and the pressure relief mechanism is arranged on the end cover.

[0139] In some embodiments of the present application, the shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film, etc. In some embodiments, the shell may be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealed bag is also included between the shell and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0140] In addition, the connection methods between the end cover and the shell include but are not limited to snap connection, bonding, welding or connection via a connector.

[0141] In some embodiments of the present application, the battery cell 10 further includes an electrode terminal, which is disposed on the end cap and electrically connected to the electrode assembly. The electrode terminal is electrically connected to the pole tab of the electrode assembly. The electrode terminal may be directly connected to the pole tab or indirectly connected to the pole tab through a current collecting member. The electrode terminal may be disposed on the end cap or on the housing. In the embodiment shown in the present application, the electrode terminal is disposed on the end cap.

[0142] like Figures 2 to 18 As shown, in some embodiments of the present application, a battery device 100 is proposed, the battery device 100 includes a box body 120, a battery cell assembly 110, a heat exchange member 20 and a flow guide 30, the battery cell assembly 110 is arranged in the box body 120, the battery cell assembly 110 includes at least one battery cell 10, the heat exchange member 20 is arranged in the box body 120, and is used to exchange heat for the battery cell 10, the heat exchange member 20 includes at least two medium flow channels 22, the medium flow channels 22 are for the heat exchange medium to flow, and the flow guide 30 includes The liquid inlet 33 and the plurality of liquid outlets 35 are provided. The liquid inlet 33 is connected with the liquid inlet 34 and is used for the external heat exchange medium to flow in. Each medium flow channel 22 is connected with the liquid inlet 34 through a corresponding liquid outlet 35. A guide structure 32 including a guide surface 321 is provided in the liquid inlet 33 and the plurality of liquid outlets 35. The guide surface 321 is inclined to the side away from the liquid inlet 33 and is used to guide the heat exchange medium from the liquid inlet 33 to the plurality of liquid outlets 35.

[0143] In this embodiment, if Figure 2 As shown, the box 120 includes a first box 121 and a second box 122, wherein the first box 121 and the second box 122 cover each other to form a storage space, and the battery cell assembly 110, the heat exchanger 20 and the guide member 30 are all arranged in the storage space. The heat exchanger 20 is arranged in the storage space, and the heat exchanger 20 can be fixed on the inner side wall, the inner top wall or the inner bottom wall of the box 120 (the fixing method includes but is not limited to bonding or connecting with fasteners). When there are multiple battery cell assemblies 110, the heat exchanger 20 can also be arranged between adjacent battery cell assemblies 110 (the fixing method includes but is not limited to bonding or connecting with fasteners), and the heat exchanger 20 can also be arranged between adjacent battery cells 10 (the fixing method includes but is not limited to bonding or connecting with fasteners).

[0144] When there are multiple heat exchange elements 20, some of the heat exchange elements 20 can be fixed on the inner wall of the box body 120, some of the heat exchange elements 20 can be arranged between adjacent battery cell assemblies 110, and some of the heat exchange elements 20 can be arranged between adjacent battery cells 10.

[0145] In addition, in the present embodiment, the heat exchange element 20 may be in a plate-like or columnar structure, and the multiple medium flow channels 22 of the heat exchange element 20 may be arranged in parallel and at intervals (for example, forming a harmonica-like structure), or in a preset shape (for example, a radial shape, etc.), and each medium flow channel 22 may be in a straight line, a curve, or a combination of a straight line and a curve, etc.

[0146] One end of the medium flow channel 22 is an inlet and is connected to the liquid outlet 35 of the guide member 30 , and the inlet is for the coolant to flow into the medium flow channel 22 . The other end of the medium flow channel 22 is an outlet, and the outlet is for the coolant to flow out of the medium flow channel 22 .

[0147] The following is a specific description of the case where the first box body 121 and the second box body 122 of the box body 120 are arranged up and down, the first box body 121 is covered on the first box body 121, and the heat exchange element 20 is a plate-shaped structure and is fixed to the inner bottom wall of the second box body 122 as an example:

[0148] In the present application, the liquid inlet 33 and the liquid outlet 35 of the guide member 30 are respectively connected to the accommodating chamber 34, and the external coolant can flow into the accommodating chamber 34 through the liquid inlet 33, and the coolant in the accommodating chamber 34 can flow into the medium channel of the heat exchange member 20 through the liquid outlet 35.

[0149] like Fig.16 As shown, the guide structure 32 is arranged inside the accommodating cavity 34 and between the liquid inlet 33 and the liquid outlet 35. The coolant entering the accommodating cavity 34 through the liquid inlet 33 needs to pass through the guide structure 32 before reaching the position of the liquid outlet 35 and flowing out through the liquid outlet 35. Among them, the guide surface 321 is arranged on the guide structure 32, and the guide surface 321 is arranged facing the liquid outlet 35. Of the opposite ends of the guide surface 321, one end is arranged close to the side of the liquid inlet 33, and the other end is arranged away from the side of the liquid inlet 33, so that the guide surface 321 is arranged obliquely relative to the liquid inlet 33.

[0150] Specifically, the external coolant flows into the medium flow channel 22 of the heat exchanger 20 through the guide member 30. After the coolant enters the accommodating cavity 34 of the guide member 30 through the liquid inlet 33, the coolant is guided by the guide surface 321 of the guide structure 32, and flows to the liquid outlet 35 under the guidance of the guide surface 321, and flows into the medium channel of the heat exchanger 20 through the liquid outlet 35.

[0151] In the related art, when the coolant enters the medium flow channel 22 of the heat exchanger 20, there is an inner wall in the medium flow channel 22 opposite to the coolant inflow direction. Since the coolant flows at a fast speed, the coolant collides with the inner wall after entering, thereby generating noise.

[0152] In the present application, since the guide surface 321 is inclined toward the side away from the liquid inlet 33, the inclination direction of the guide member 30 is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet 33 reaches the position of the guide surface 321, the coolant will flow along the inclination direction of the guide surface 321, thereby reducing the abnormal noise caused by the impact of the coolant. At the same time, under the guidance of the guide surface 321, the flow rate of the coolant can be slowed down, thereby reducing the abnormal noise generated when the coolant enters the medium channel of the heat exchanger 20.

[0153] In addition, the coolant is guided by the guide member 30 so that the flow rate of the coolant is reduced, thereby making the coolant flowing out through each liquid outlet 35 more uniform, thereby improving the uniformity of the coolant flowing into each medium flow channel 22 in the heat exchange element 20.

[0154] It should be pointed out that the guide member 30 includes multiple side walls, which surround the accommodating cavity 34, wherein the liquid inlet 33 and the liquid outlet 35 can be arranged on the same side wall or on different side walls (for example, the liquid inlet 33 and the liquid outlet 35 are arranged on two oppositely arranged side walls of the guide member 30, or the liquid inlet 33 and the liquid outlet 35 are arranged on two adjacent side walls of the guide member 30).

[0155] In addition, the guide member 30 may be a plate-shaped member, a column-shaped member, a spherical member, or the like.

[0156] In some embodiments of the present application, Figures 16 to 18 As shown, the flow guiding structure 32 is a rib plate disposed in the accommodating cavity 34 , and the side of the rib plate facing the liquid inlet 33 forms a flow guiding surface 321 .

[0157] Specifically, the guide member 30 is a rib plate, which is arranged in the accommodating cavity 34. The rib plate has two oppositely arranged large surfaces (large surfaces refer to the surfaces with the largest area among the multiple surfaces of the rib plate), wherein one large surface is arranged facing the water inlet, and the other large surface is arranged facing the water outlet, and the large surface facing the water inlet is the guide surface 321. After the external coolant enters the accommodating cavity 34 of the guide member 30 through the liquid inlet 33, the coolant is guided by the guide surface 321 of the guide structure 32, and flows to the liquid outlet 35 under the guidance of the guide surface 321, and flows into the medium channel of the heat exchange member 20 through the liquid outlet 35.

[0158] The guide structure 32 is set as a rib plate. The rib plate has a simple structure and is easy to process, which can effectively shorten the processing time, thereby speeding up the production cycle. In addition, the rib plate has a simple structure and can effectively reduce the manufacturing cost. In addition, while the rib plate can effectively guide the coolant, it is light in texture and can effectively reduce the overall mass of the guide member 30, thereby reducing the overall mass of the battery device 100.

[0159] It should be pointed out that the rib plate is fixed in the accommodating cavity 34 of the guide member 30, and at least part of the edge of the rib plate is connected to the inner wall of the accommodating cavity 34, wherein the liquid inlet 33 is connected to the multiple liquid outlets 35 through the accommodating cavity 34, and the rib plate is arranged at a position between the liquid inlet 33 and the multiple liquid outlets 35. The rib plate can partially or completely block the area of ​​the accommodating cavity 34 between the liquid inlet 33 and the multiple liquid outlets 35. When the rib plate partially blocks the area of ​​the accommodating cavity 34 between the liquid inlet 33 and the multiple liquid outlets 35, the coolant guided by the guide member 30 can flow to the multiple liquid outlets 35 through the unblocked area or the connecting area on the rib plate. When the rib plate completely blocks the area of ​​the accommodating cavity 34 between the liquid inlet 33 and the multiple liquid outlets 35, the coolant guided by the guide member 30 can flow to the multiple liquid outlets 35 through the connecting area on the rib plate.

[0160] In some embodiments of the present application, the guide surface 321 is a plane or a curved surface.

[0161] Specifically, Fig.16 As shown, when the guide surface 321 is a plane, the planar guide surface 321 is easy to process, which can improve the convenience of processing and speed up the production cycle.

[0162] When the guide surface 321 is a curved surface, when the coolant is guided by the guide surface 321, the curved guide surface 321 can increase the flow path of the coolant and can further reduce the flow rate of the coolant, so that the abnormal noise generated during the coolant inflow process is further reduced.

[0163] In some embodiments of the present application, Fig.16 As shown, the guide surface 321 is a plane, and the inclination angle a of the plane is greater than 90 degrees and less than 180 degrees.

[0164] Specifically, the flow guide structure 32 is arranged in the accommodating cavity 34 of the flow guide member 30, the flow guide structure 32 is fixed in the accommodating cavity 34, and the flow guide surface 321 of the flow guide structure 32 is arranged to be inclined relative to the liquid inlet 33 toward the liquid outlet 35, that is, the flow guide surface 321 is arranged to be inclined toward the side away from the liquid inlet 33. Since the flow guide surface 321 is arranged to be inclined toward the side away from the liquid inlet 33, the inclination direction of the flow guide member 30 is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet 33 reaches the position of the flow guide surface 321, the coolant will flow along the inclination direction of the flow guide surface 321, thereby reducing the abnormal sound caused by the impact of the coolant. At the same time, under the guidance of the flow guide surface 321, the flow rate of the coolant can be slowed down, thereby reducing the abnormal sound generated when the coolant enters the medium channel of the heat exchange member 20.

[0165] like Fig.16As shown, the guide surface 321 is set to a plane, which makes processing more convenient. At the same time, the inclination angle a of the plane is set to be greater than 90 degrees and less than 180 degrees, so that the guide surface 321 can fully play the guiding role of the coolant, thereby reducing the flow rate of the coolant, so that the situation of abnormal noise caused by the inflow of coolant is further reduced.

[0166] It should be pointed out that the value of the inclination angle a can be specifically 95 degrees, 105 degrees, 115 degrees, 125 degrees, 135 degrees, 140 degrees, 155 degrees, 165 degrees, 175 degrees or 180 degrees, etc.

[0167] In some embodiments of the present application, Fig.16 As shown, the inclination angle a of the plane is greater than or equal to 100 degrees and less than or equal to 145 degrees. Specifically, the guide surface 321 on the guide structure 32 is a plane, and the inclination angle a of the plane is set to be greater than or equal to 100 degrees and less than or equal to 145 degrees, so that the guide surface 321 can play the best effect on guiding the coolant, thereby further reducing the situation of abnormal noise caused by the inflow of coolant.

[0168] It should be noted that the value of the inclination angle a can be specifically 100 degrees, 110 degrees, 120 degrees, 130 degrees or 145 degrees, etc.

[0169] In some embodiments of the present application, the connection between the rib plate and the inner wall of the accommodating cavity 34 includes bonding, welding, connection via a connector, or integral molding.

[0170] Specifically, the guide structure 32 is a rib plate and is fixed in the accommodating cavity 34. The connection between the rib plate and the inner wall of the accommodating cavity 34 is set to be bonding, welding, connection via a connector or integral molding, which effectively meets the needs of the processing process, thereby improving the convenience of processing and speeding up the production rhythm.

[0171] For example, when the connection between the rib plate and the accommodating cavity 34 is by bonding, the rib plate is set in the accommodating cavity 34, and after the rib plate is set in the desired installation position, the edge of the rib plate is bonded and fixed to the inner wall of the accommodating cavity 34 using adhesive.

[0172] For another example, when the connection method between the rib plate and the accommodating cavity 34 is welding, the rib plate is set in the accommodating cavity 34, and after the rib plate is set in the desired installation position, the edge of the rib plate is welded and fixed to the inner wall of the accommodating cavity 34 using welding equipment (for example, brazing or extending a welding gun from the liquid outlet 35 into the accommodating cavity 34).

[0173] For another example, when the connection between the rib plate and the accommodating cavity 34 is integrally formed, when processing the flow guide member 30 , the flow guide structure 32 as the rib plate is directly and synchronously processed (for example, by injection molding, casting or 3D printing).

[0174] In some embodiments of the present application, Fig.16 or Fig.18 As shown, the guide structure 32 divides the accommodating chamber 34 into a first chamber 341 and a second chamber 342, the liquid inlet 33 is connected to the first chamber 341, and the plurality of liquid outlets 35 are connected to the second chamber 342. At least one connecting hole 37 is provided on the guide structure 32, and the first chamber 341 is connected to the second chamber 342 through the at least one connecting hole 37. The liquid inlet 33 has a first projection on the guide surface 321, and the first projection is spaced apart from the connecting hole 37.

[0175] Specifically, the guide member 30 includes multiple side walls, the liquid inlet 33 and the multiple liquid outlets 35 are arranged on two oppositely arranged side walls of the guide member 30, the guide structure 32 is arranged in the accommodating cavity 34 of the guide member 30, and the guide structure 32 is arranged between the liquid inlet 33 and the multiple liquid outlets 35.

[0176] The edge of the flow-guiding structure 32 is connected and fixed to the inside of the accommodating chamber 34. At this time, the flow-guiding structure 32 divides the accommodating chamber 34 into two parts, namely the first chamber 341 and the second chamber 342. The liquid inlet 33 is connected to the first chamber 341, and the plurality of liquid outlets 35 are connected to the second chamber 342. The first chamber 341 and the second chamber 342 are connected to each other through the connecting hole 37 on the flow-guiding structure 32. Such a configuration can extend the flow path of the coolant, so that the flow rate of the coolant can be further reduced, thereby reducing the abnormal sound caused by the high flow rate of the coolant.

[0177] It should be understood that in the arrangement direction of the first chamber 341 and the second chamber 342 (eg Fig.16 Or as shown in 18, Fig.16 Or 18, the second direction Y is consistent with the arrangement direction of the first chamber 341 and the second chamber 342), the liquid inlet 33 forms a first projection on the guide surface 321, and the first projection is spaced apart from the connecting hole 37 provided on the guide structure 32. Such a configuration can ensure that the coolant entering through the liquid inlet 33 will not flow directly into the second chamber 342 through the connecting hole 37 when reaching the guide surface 321, thereby increasing the path for the coolant to flow from the first chamber 341 into the second chamber 342, so that the flow rate of the coolant can be slowed down, thereby improving the uniformity of the coolant flow.

[0178] It should be noted that the number of the communication holes 37 may be one, two, three, four, five, six, seven or eight, etc. When the number of the communication holes 37 is multiple (two or more), the multiple communication holes 37 are arranged at intervals on the guide member 30 .

[0179] In addition, the distance between the connecting hole 37 and the first projection is proportional to the flow path of the coolant in the first chamber 341. By adjusting the position of the connecting hole 37, the path of the coolant flowing from the first chamber 341 to the second chamber 342 can be adjusted. At the same time, the flow rate of the coolant flowing from the first chamber 341 to the second chamber 342 can also be adjusted by controlling the opening area of ​​the connecting hole 37.

[0180] In addition, the connection position between the side of the guide surface 321 close to the liquid inlet 33 and the inner wall of the accommodating chamber 34 is an arc transition, and the connection position between the side of the guide surface 321 away from the liquid inlet 33 and the inner wall of the accommodating chamber 34 is an arc transition.

[0181] In some embodiments of the present application, Fig.18 As shown, there are multiple communicating holes 37, at least one isolation structure 36 is provided in the second chamber 342, and the at least one isolation structure 36 divides the second chamber 342 into multiple chamber parts 3421, and the multiple chamber parts 3421 are arranged in sequence along the first direction X, each chamber part 3421 is connected to at least one liquid outlet 35, and each chamber part 3421 is connected to the first chamber 341 through at least one communicating hole 37, wherein the first direction X is related to the arrangement direction of the first chamber 341 and the second chamber 342 (such as Fig.16 Or as shown in 18, Fig.16 Or 18, the second direction Y intersects with the arrangement direction of the first chamber 341 and the second chamber 342).

[0182] Specifically, the second chamber 342 is separated into a plurality of chamber portions 3421 in the first direction X by an isolation structure 36 , each chamber portion 3421 is connected to an equal or unequal number of liquid outlets 35 , and each chamber portion 3421 is connected to the medium flow channel 22 of the heat exchange element 20 through the liquid outlet 35 .

[0183] When the coolant flows into the first chamber 341 from the liquid inlet 33, the coolant reaches the guide surface 321 of the guide structure 32. Under the guidance of the guide surface 321, the coolant flows along the first direction X to the position of the connecting hole 37. When the coolant reaches the position of the connecting hole 37, the coolant enters the chamber portion 3421 of the second chamber 342 through the connecting hole 37. The coolant entering the chamber portion 3421 flows into the medium flow channel 22 of the heat exchange component 20 through the liquid outlet 35.

[0184] The second chamber 342 is configured to include a plurality of chamber portions 3421, and each chamber portion 3421 is configured to be connected to the first chamber 341 via at least one connecting hole 37. This configuration enables the coolant to flow into the medium flow channel 22 of the heat exchange element 20 more evenly, thereby improving the heat exchange effect of the heat exchange element 20 on the battery cell assembly 110.

[0185] In addition, the number of the communicating holes 37 communicating with each chamber may be one, two, three, four, five or six, etc.

[0186] In some embodiments of the present application, the liquid outlet 35 has a second projection on the flow guiding structure 32 , wherein the second projection is spaced apart from the connecting hole 37 , or the second projection and the connecting hole 37 are partially overlapped.

[0187] Such a configuration can increase the flow path of the coolant, so that the flow rate of the coolant is further reduced, thereby further reducing the abnormal noise problem generated during the flow of the coolant, and at the same time can improve the uniformity of the coolant flowing into the medium flow channel 22 of the heat exchanger 20, further improving the heat exchange effect of the heat exchanger 20 on the battery cell assembly 110.

[0188] In addition, in the present application, when the guide member 30 is processed and the guide structure 32 is connected to the inner wall of the accommodating chamber 34 by welding, the welding equipment can penetrate into the second chamber 342 through the liquid inlet 33 and reach the position of the guide structure 32, thereby realizing the welding and fixing of the guide structure 32 to the inner wall of the accommodating chamber 34.

[0189] It should be pointed out that, in the present application, the area of ​​the second projection may be greater than, less than or equal to the area of ​​the liquid outlet 35 .

[0190] In some embodiments of the present application, Fig.18 As shown, each chamber portion 3421 includes a communication hole 37, and each chamber portion 3421 includes a plurality of liquid outlets 35. Among the two adjacent liquid outlets 35, the opening area of ​​one liquid outlet 35 close to the communication hole 37 along the first direction X is a first area, and the opening area of ​​the other liquid outlet 35 away from the communication hole 37 along the first direction X is a second area, and the second area is larger than the first area.

[0191] Specifically, after the coolant flows into the first chamber 341 from the liquid inlet 33, the coolant reaches the guide surface 321 of the guide structure 32. Under the guidance of the guide surface 321, the coolant flows along the first direction X to the position of the connecting hole 37. After the coolant reaches the position of the connecting hole 37, the coolant enters the chamber portion 3421 of the second chamber 342 through the connecting hole 37. The coolant entering the chamber portion 3421 flows through the liquid outlet 35 in the chamber portion 3421 in the direction of the liquid outlet 35, and flows into the medium flow channel 22 of the heat exchange component 20 through the liquid outlet 35.

[0192] By setting the opening area of ​​the liquid outlet 35 close to the connecting hole 37 of the two adjacent liquid outlets 35 in the first direction X as the first area, and the opening area of ​​the liquid outlet 35 away from the connecting hole 37 as the second area, and setting the second area to be larger than the first area, the opening area of ​​the liquid outlet 35 away from the connecting hole 37 is larger than the area of ​​the liquid outlet 35 close to the connecting hole 37, so that the cooling liquid flowing out through each liquid outlet 35 can be more uniform, and further the uniformity of the cooling liquid flowing into the medium channel of the heat exchange element 20 through the liquid outlet 35 can be further improved, so that the heat exchange effect of the heat exchange element 20 on the battery cell assembly 110 is further improved.

[0193] It should be understood that, in the first direction X, within each chamber portion 3421, the farther the distance from the connecting hole 37 connected to the chamber portion 3421, the larger the opening area of ​​the liquid outlet 35, and conversely, the closer the distance from the connecting hole 37 connected to the chamber portion 3421, the smaller the opening area of ​​the liquid outlet 35.

[0194] In some embodiments of the present application, Fig.18 As shown, the isolation structure 36 is a sheet-like structure, and the connection between the isolation structure 36 and the inner wall of the second chamber 342 includes bonding, welding, connection via a connector, or integral molding.

[0195] Such a setting effectively meets the needs of the processing process, thereby improving the convenience of processing and speeding up the production rhythm.

[0196] For example, the isolation structure 36 with a sheet-like structure is fixed by welding, and an insertion strip hole is opened on the guide member 30, and the insertion strip hole is connected to the second chamber 342. The isolation structure 36 with a sheet-like structure is inserted into the second chamber 342 from the insertion strip hole, and the isolation structure 36 with a sheet-like structure supplements the structure of the opening position of the insertion strip hole. The welding equipment welds the insertion strip hole and the isolation structure 36 with a sheet-like structure. At the same time, the welding equipment probes into the second chamber 342 from the liquid outlet 35 to weld the isolation structure 36 with a sheet-like structure to the guide structure 32 and the inner wall of the second chamber 342 respectively.

[0197] For another example, when the isolation structure 36 having a sheet structure is connected to the inner wall of the second chamber 342 by integral molding, when processing the guide member 30, the guide structure 32 as a rib plate is directly and synchronously processed (for example, by injection molding, casting or 3D printing).

[0198] In some embodiments of the present application, the connecting hole 37 is a circular hole, an elliptical hole or a polygonal hole.

[0199] Specifically, the connecting hole 37 is configured as a circular hole, an elliptical hole or a polygonal hole. In this way, the shape of the connecting hole 37 can be configured according to different requirements, thereby meeting the use requirements of the battery device 100 .

[0200] In some embodiments of the present application, Fig. 9 As shown, a receiving structure 21 is provided on the heat exchange element 20 , and at least a portion of the flow guide element 30 is embedded and installed in the receiving structure 21 .

[0201] Specifically, a receiving structure 21 is provided at the end of the heat exchanger 20, and the receiving structure 21 is respectively connected to each medium flow channel 22. When the flow guide 30 is assembled with the heat exchanger 20, one end of the flow guide 30 having the liquid outlet 35 is inserted into the receiving structure 21, so that each liquid outlet 35 corresponds to a medium flow channel 22 and is connected to each other.

[0202] Such an arrangement can make the assembled structure compact, reduce the occupation of the internal space of the box 120, thereby improving the space utilization of the box 120, and further increasing the energy density of the battery device 100. In addition, embedding at least part of the flow guide 30 in the receiving structure 21 can improve the convenience of assembly, thereby improving the assembly efficiency and speeding up the production cycle.

[0203] It should be noted that the shape of the receiving structure 21 is adapted to the shape of the guide member 30. The guide member 30 may be partially embedded in the receiving structure 21, or may be fully embedded in the receiving structure 21.

[0204] In some embodiments of the present application, the guide member 30 is fixed in the receiving structure 21 by bonding, clamping, welding or connecting with a connector.

[0205] Specifically, the guide member 30 is configured to be fixed in the receiving structure 21 by bonding, clamping, welding or connecting via a connector. Such a configuration effectively meets the requirements of the processing process, thereby improving the convenience of processing and further speeding up the production rhythm.

[0206] In some embodiments of the present application, Figures 6 to 8As shown, the box body 120 includes a liquid inlet structure 1223, into which external cooling liquid flows, and the liquid inlet port 33 is plugged and matched with the liquid inlet structure 1223.

[0207] Specifically, the external coolant flows into the guide member 30 through the liquid inlet structure 1223 on the box body 120, and flows into the heat exchange member 20 through the guide member 30. The liquid inlet 33 of the guide member 30 is configured to be plugged with the liquid inlet structure 1223 of the box body 120. This configuration improves the convenience of the assembly process, improves the efficiency of the assembly, and thus speeds up the production cycle.

[0208] In addition, the liquid inlet 33 of the guide member 30 is configured to be plugged in with the liquid inlet structure 1223 of the box body 120. The plug-in fit has better sealing performance and can reduce the occurrence of coolant leakage.

[0209] In addition, in the present application, the guide member 30 is disposed inside the box body 120 , which can reduce the adverse effects of external factors (such as external impact, etc.) on the guide member 30 , thereby reducing the occurrence of damage to the guide member 30 due to the external environment.

[0210] It should be pointed out that if Figures 6 to 8 As shown, in the present application, the second box body 122 of the box body 120 includes a frame and a bottom plate, and the frame and the bottom plate enclose a receiving space, which is used to accommodate the heat exchange component 20, the guide component 30 and the battery cell assembly 110. The frame includes a first frame 1222, and the liquid inlet structure 1223 is arranged on the first frame 1222. A liquid inlet connector 1221 is also provided on the first frame 1222. The liquid inlet connector is connected to the liquid inlet structure 1223, and the liquid inlet connector 1221 is connected to an external cooling liquid supply device so that the cooling liquid can enter the heat conductive component.

[0211] In some embodiments of the present application, Figures 6 to 8 As shown, the flow guide 30 is provided with a plug connector 31, the liquid inlet 33 is opened on the plug connector 31, the liquid inlet structure 1223 is a liquid inlet hole, and the plug connector 31 is plugged into the liquid inlet hole.

[0212] Specifically, the plug connector 31 is disposed on the flow guide member 30 and can be integrally formed with the flow guide member 30 or installed on the flow guide member 30 after being processed separately, thereby reducing the manufacturing difficulty of the box body 120 and improving the production efficiency.

[0213] In addition, the plug-in cooperation between the plug connector 31 and the liquid inlet hole can reduce the volume occupied by the overall structure after assembly, thereby reducing the space occupied inside the box 120, so that the space utilization rate of the box 120 is effectively improved.

[0214] In some embodiments of the present application, the battery device 100 further includes a first sealing structure (not shown in the figure), which is disposed between the plug connector 31 and the liquid inlet hole and seals the plug connector 31 and the liquid inlet hole.

[0215] Specifically, by providing the first sealing structure and sealing the plug connector 31 and the liquid inlet hole through the first sealing structure, the sealing performance of the connection position can be improved and the leakage of the coolant can be reduced.

[0216] In some embodiments of the present application, the first sealing structure is a sealing ring or a sealing glue. In this way, the first sealing structure can be configured according to different requirements, thereby meeting the use requirements of the battery device 100.

[0217] In some embodiments of the present application, Figure 6 , Figures 10 to 14 As shown, the battery device 100 further includes a second sealing structure 40 , which is disposed between the flow guide 30 and the box body 120 and seals the flow guide 30 and the box body 120 .

[0218] Specifically, by providing the second sealing structure 40 and sealing the guide member 30 and the box body 120 , the sealing performance of the connection position can be improved, and the leakage of the coolant can be reduced.

[0219] In some embodiments of the present application, the second sealing structure 40 is a sealant (such as Fig.11 and Fig.12 as shown) or sealing sheet (as Fig.13 and Fig.14 as shown).

[0220] Specifically, the second sealing structure 40 is configured as a sealant or a sealing sheet. In this way, the second sealing structure 40 can be configured according to different requirements, thereby meeting the use requirements of the battery device 100.

[0221] In some embodiments of the present application, the second sealing structure 40 is a sealing sheet, and the sealing sheet is fixed between the box body 120 and the guide member 30 by bonding or welding.

[0222] Specifically, the second sealing structure 40 is a sealing sheet and is fixed between the box body 120 and the guide member 30 by bonding or welding. Such a configuration can increase the strength of the sealing position and further improve the sealing performance of the sealing position.

[0223] like Figures 1 to 18 As shown, the second aspect of the present application proposes an electrical device, which includes the battery device 100 as described above.

[0224] In the battery device 100 of the electric device, after the coolant enters the accommodating cavity 34 of the guide member 30 through the liquid inlet 33, the coolant is guided by the guide surface 321 of the guide structure 32, and flows to the liquid outlet 35 under the guidance of the guide surface 321, and flows into the medium channel of the heat exchange member 20 through the liquid outlet 35. Since the guide surface 321 is inclined to the side away from the liquid inlet 33, the inclination direction of the guide member 30 is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet 33 reaches the position of the guide surface 321, the coolant will flow along the inclination direction of the guide surface 321, thereby reducing the abnormal sound caused by the impact of the coolant. At the same time, under the guidance of the guide surface 321, the flow rate of the coolant can be slowed down, thereby reducing the abnormal sound generated when the coolant enters the medium channel of the heat exchange member 20.

[0225] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0226] In the implementation mode of the present application, Figures 3 to 18 As shown, the present application proposes a battery device 100, which includes a box 120, a battery cell assembly 110, a heat exchange member 20 or a flow guide 30, the battery cell assembly 110 is arranged in the box 120, the battery cell assembly 110 includes at least one battery cell 10, the heat exchange member 20 is arranged in the box 120, and is used to exchange heat for the battery cell 10, the heat exchange member 20 includes at least two medium flow channels 22, the medium flow channels 22 are for the heat exchange medium to flow, and the flow guide 30 includes a medium containing a heat exchange medium. The liquid inlet 33 and the plurality of liquid outlets 35 are connected to the accommodating chamber 34 and are used for the external heat exchange medium to flow in. Each medium flow channel 22 is connected to the accommodating chamber 34 through a liquid outlet 35. A guide structure 32 including a guide surface 321 is provided in the accommodating chamber 34. The guide structure 32 is arranged between the liquid inlet 33 and the plurality of liquid outlets 35. The guide surface 321 is inclined to the side away from the liquid inlet 33 and is used to guide the heat exchange medium from the liquid inlet 33 to the plurality of liquid outlets 35.

[0227] After the coolant enters the accommodating cavity 34 of the guide member 30 through the liquid inlet 33, the coolant is guided by the guide surface 321 of the guide structure 32, and flows to the liquid outlet 35 under the guidance of the guide surface 321, and flows into the medium channel of the heat exchange member 20 through the liquid outlet 35. Since the guide surface 321 is inclined to the side away from the liquid inlet 33, the inclination direction of the guide member 30 is consistent with the inflow direction of the coolant. When the coolant entering through the liquid inlet 33 reaches the position of the guide surface 321, the coolant will flow along the inclination direction of the guide surface 321, thereby reducing the abnormal sound caused by the impact of the coolant. At the same time, under the guidance of the guide surface 321, the flow rate of the coolant can be slowed down, thereby reducing the abnormal sound generated when the coolant enters the medium channel of the heat exchange member 20.

[0228] Furthermore, the flow guiding structure 32 is a rib plate disposed in the accommodating cavity 34, and the side of the rib plate facing the liquid inlet 33 constitutes a flow guiding surface 321. The flow guiding surface 321 is a plane, and the inclination angle a of the plane is greater than or equal to 100 degrees and less than or equal to 145 degrees. The connection between the rib plate and the inner wall of the accommodating cavity 34 is welding.

[0229] Furthermore, the guide structure 32 of the rib plate divides the accommodating chamber 34 into a first chamber 341 and a second chamber 342, the liquid inlet 33 is connected to the first chamber 341, and the plurality of liquid outlets 35 are connected to the second chamber 342. A connecting hole 37 is provided on the guide structure 32, and the first chamber 341 is connected to the second chamber 342 through the connecting hole 37. The liquid inlet 33 has a first projection on the guide surface 321, and the first projection is spaced apart from the connecting hole 37. There are multiple communicating holes 37, at least one isolation structure 36 is provided in the second chamber 342, at least one isolation structure 36 divides the second chamber 342 into multiple chamber parts 3421, multiple chamber parts 3421 are arranged in sequence along the first direction X, each chamber part 3421 is connected to at least one liquid outlet 35, each chamber part 3421 is connected to the first chamber 341 through at least one communicating hole 37, wherein the first direction X intersects with the arrangement direction of the first chamber 341 and the second chamber 342. The liquid outlet 35 has a second projection on the guide structure 32, wherein the second projection is spaced apart from the communicating hole 37, or the second projection is partially overlapped with the communicating hole 37.

[0230] Further, each chamber portion 3421 includes a communication hole 37, and each chamber portion 3421 includes a plurality of liquid outlets 35. Among them, in the first direction X, the opening area of ​​the liquid outlet 35 close to the communication hole 37 of two adjacent liquid outlets 35 is a first area, and the opening area of ​​the liquid outlet 35 away from the communication hole 37 is a second area, and the second area is larger than the first area.

[0231] Furthermore, the isolation structure 36 is a sheet-like structure, and the isolation structure 36 and the inner wall of the second chamber 342 are connected by welding.

[0232] Furthermore, the communicating hole 37 is a rectangular hole.

[0233] Furthermore, a receiving structure 21 is provided on the heat exchange member 20, and at least a part of the flow guide member 30 is embedded and installed in the receiving structure 21. The flow guide member 30 is fixed in the receiving structure 21 by welding.

[0234] Furthermore, the box body 120 includes a liquid inlet structure 1223, the liquid inlet structure 1223 is for external coolant to flow in, and the liquid inlet port 33 is plugged into the liquid inlet structure 1223. The guide member 30 is provided with a plug connector 31, the liquid inlet port 33 is provided on the plug connector 31, the liquid inlet structure 1223 is a liquid inlet hole, and the plug connector 31 is plugged into the liquid inlet hole.

[0235] Furthermore, the battery device 100 further includes a first sealing structure, which is disposed between the plug connector 31 and the liquid inlet and seals the plug connector 31 and the liquid inlet. The first sealing structure is a sealing ring.

[0236] Furthermore, the battery device 100 further includes a second sealing structure 40, which is disposed between the flow guide 30 and the box 120 and seals the flow guide 30 and the box 120. The second sealing structure 40 is a sealant or a sealing sheet. When the second sealing structure 40 is a sealing sheet, the sealing sheet is fixed between the box 120 and the flow guide 30 by bonding or welding.

[0237] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A box body, the box body comprising a liquid inlet structure, the liquid inlet structure is a liquid inlet hole, and the liquid inlet structure is for external cooling liquid to flow into; A battery cell assembly, the battery cell assembly is arranged in the box, and the battery cell assembly includes at least one battery cell; A heat exchange component, which is disposed in the box and is used to exchange heat for the battery cells, and includes at least two medium flow channels, and the medium flow channels are used for heat exchange medium to flow; A flow guide, the flow guide comprises a receiving chamber, a liquid inlet and a plurality of liquid outlets, the flow guide is provided with a plug connector, the liquid inlet is arranged on the plug connector, the plug connector is plugged into the liquid inlet hole, the liquid inlet is communicated with the receiving chamber and is used for external heat exchange medium to flow in, each of the medium flow channels is communicated with the receiving chamber through a corresponding liquid outlet, a flow guide structure comprising a flow guide surface is provided in the receiving chamber, the flow guide structure is arranged between the liquid inlet and the plurality of liquid outlets, the flow guide surface is arranged obliquely to a side away from the liquid inlet and is used to guide the heat exchange medium from the liquid inlet to the plurality of liquid outlets; In which, the guide structure is a rib plate arranged in the accommodating cavity, and the side of the rib plate facing the liquid inlet constitutes the guide surface, and all edges of the rib plate are connected to the inner wall of the accommodating cavity, and the cooling liquid guided by the guide member flows to the multiple liquid outlets through the connecting area on the rib plate; the guide structure divides the accommodating cavity into a first chamber and a second chamber, the liquid inlet is connected to the first chamber, and the multiple liquid outlets are connected to the second chamber, and at least one connecting hole is opened on the guide structure, and the first chamber is connected to the second chamber through the at least one connecting hole, wherein the liquid inlet has a first projection on the guide surface, and the first projection is spaced apart from the connecting hole.

2. The battery device according to claim 1, characterized in that The guide surface is a plane or a curved surface.

3. The battery device according to claim 2, characterized in that: The guide surface is a plane, and the inclination angle of the plane is greater than 90 degrees and less than 180 degrees.

4. The battery device according to claim 3, characterized in that: The inclination angle of the plane is greater than or equal to 100 degrees and less than or equal to 145 degrees.

5. The battery device according to claim 1, wherein: The connection between the rib plate and the inner wall of the accommodating cavity includes bonding, welding, connection via a connecting piece or integral molding.

6. The battery device according to claim 1, wherein: There are multiple connecting holes, and at least one isolation structure is provided in the second chamber. The at least one isolation structure divides the second chamber into multiple chamber parts. The multiple chamber parts are arranged in sequence along a first direction, and each of the chamber parts is connected to the first chamber through at least one connecting hole, wherein the first direction intersects with the arrangement direction of the first chamber and the second chamber.

7. The battery device according to claim 6, characterized in that: The liquid outlet has a second projection on the flow guiding structure; Wherein, the second projection is spaced apart from the connecting hole, or the second projection is partially overlapped with the connecting hole.

8. The battery device according to claim 6, characterized in that: Each of the chamber parts includes one of the communicating holes, and each of the chamber parts includes a plurality of the liquid outlets; Among them, among the two adjacent liquid outlets, the opening area of ​​the one liquid outlet close to the connecting hole along the first direction is the first area, and the opening area of ​​the other liquid outlet away from the connecting hole along the first direction is the second area, and the second area is larger than the first area.

9. The battery device according to claim 6, characterized in that: The isolation structure is a sheet-like structure, and the connection between the isolation structure and the inner wall of the second chamber includes bonding, welding, connection via a connector, or integral molding.

10. The battery device according to claim 1, wherein: The communicating hole is a circular hole, an elliptical hole or a polygonal hole.

11. The battery device according to any one of claims 1 to 10, characterized in that: The heat exchange component is provided with a receiving structure, and at least a part of the flow guide component is embedded and installed in the receiving structure.

12. The battery device according to claim 11, characterized in that The flow guide is fixed in the receiving structure by bonding, clamping, welding or by connecting a connector.

13. The battery device according to any one of claims 1 to 10, characterized in that: The battery device further comprises a first sealing structure, which is arranged between the plug connector and the liquid inlet hole and seals the plug connector and the liquid inlet hole.

14. The battery device according to claim 13, characterized in that: The first sealing structure is a sealing ring or a sealing adhesive.

15. The battery device according to any one of claims 1 to 10, characterized in that: The battery device further includes a second sealing structure, which is disposed between the flow guide and the box body and seals the flow guide and the box body.

16. The battery device according to claim 15, characterized in that The second sealing structure is a sealant or a sealing sheet.

17. The battery device according to claim 16, characterized in that: The second sealing structure is a sealing sheet, and the sealing sheet is fixed between the box body and the guide member by bonding or welding.

18. An electrical equipment, characterized in that: The electric device comprises the battery device according to claim 17.

Images