Battery system and electric device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery system and an electric device. The battery system comprises a plurality of assembling units and an upper cover. The assembly unit comprises two battery packs and two cold plates. The cold plate is arranged at the bottom of the battery pack in the first direction. The two battery packs are stacked in the first direction to form an assembly unit, and one cold plate is located between the two battery packs. The battery system comprises one or more assembly units stacked in the height direction of the battery system, and the other cold plate is located between the two adjacent assembly units. The cold plates in the two battery packs can be used for cooling the tops and the bottoms of the battery modules in the battery packs at the same time, so that the cooling speed of the battery packs is greatly improved, and the service life of the battery system and the service life of the power utilization device are further prolonged. And the upper cover is connected to the tops of the plurality of assembly units along the first direction and is used for blocking the plurality of assembly units, so that the integrity and the safety of the battery system are ensured.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery system and an electrical device. Background Technology

[0002] Some electrical devices on the market, such as electric heavy trucks and large equipment like energy storage cabinets, require battery packs with extremely high energy density. Therefore, multiple battery packs can be stacked to form a battery system with high energy density, thereby meeting the power supply needs of these devices.

[0003] In related technologies, battery systems contain a large number of battery packs, which generate a lot of heat when supplying power, making them prone to thermal damage. Utility Model Content

[0004] This application provides a battery system and an electrical device that allows a cold plate to simultaneously dissipate heat and cool two battery packs, thereby reducing the thermal damage to the battery system caused by the heat generated when the battery system is supplying power, and extending the service life of the battery system and the electrical device.

[0005] In a first aspect, this application provides a battery system, comprising: multiple assembly units and a top cover. Each assembly unit includes two battery packs and two cold plates. The cold plates are disposed at the bottom of the battery packs along a first direction. The two battery packs are stacked along the first direction to form one assembly unit, such that one cold plate is located between the two battery packs. The battery system includes one or more assembly units stacked along the first direction, such that another cold plate is located between two adjacent assembly units. The top cover is connected to the top of the multiple assembly units along the first direction. The first direction is the height direction of the battery system.

[0006] As provided in the first aspect, the battery system provided in this application includes multiple assembly units and a top cover. The top cover seals the multiple assembly units, thus making the battery system a closed system, ensuring its integrity and safety. Two battery packs in an assembly unit are stacked along a first direction to form one assembly unit, with one cold plate located between the two battery packs. Simultaneously, in the multiple assembly units stacked along the first direction, another cold plate is located between two adjacent assembly units, allowing the cold plates in the two battery packs to simultaneously dissipate heat from the top and bottom of the battery modules within the battery packs. This significantly improves the heat dissipation rate of the battery pack, thereby extending the service life of the battery system and the electrical device.

[0007] In one possible design, the battery pack includes a battery module, a first pad, and a second pad. The first pad is disposed on top of the battery module along a first direction. The second pad is disposed at the bottom of the battery module along the first direction. The first pad is connected to one of the cold plates. The second pad is connected to the other cold plate. Both the first and second pads are thermally conductive materials, and the first pad is an insulating material.

[0008] Based on the description of the above embodiments, a first pad with thermal conductivity and insulation is provided between the top of the battery module and the cold plate, and a second pad with thermal conductivity is provided between the bottom of the battery module and the cold plate, which further improves the heat exchange efficiency between the cold plate and the battery module, while avoiding short circuits in the battery module and ensuring the safety of the battery pack.

[0009] In one possible design, the thickness of the first padding material in the first direction is greater than 0.5 mm. Furthermore, the thickness of the first padding material in the first direction is less than 10 mm.

[0010] Based on the description of the above embodiments, the thickness of the first pad material in the first direction is greater than 0.5 mm and less than 10 mm, which can ensure the heat exchange efficiency between the top of the battery module and the cold plate as well as the safety of the battery pack.

[0011] In one possible design, the thickness of the second padding material in the first direction is greater than 0.5 mm. Furthermore, the thickness of the second padding material in the first direction is less than 10 mm.

[0012] Based on the description of the above embodiments, the thickness of the second pad in the first direction is greater than 0.5 mm and less than 10 mm, which can ensure the heat exchange efficiency between the bottom of the battery module and the cold plate as well as the safety of the battery pack.

[0013] In one possible design, multiple busbars are located on the top of the battery module. A first pad is attached to the busbars.

[0014] Based on the description of the above embodiments, the first padding material is attached to the busbar, which can transfer the heat in the busbar to the cold plate to achieve heat exchange, and can also isolate and insulate the busbar from the cold plate, thus ensuring the safety of the battery pack.

[0015] In one possible design, the battery pack further includes a battery housing. The battery housing includes multiple side panels. A cold plate is connected to the bottom of the multiple side panels along the first direction, such that the multiple side panels and the cold plate form a receiving cavity. The receiving cavity is used to house the battery module, a first pad, and a second pad. When two battery packs are stacked along the first direction, the cold plate of one battery pack is connected to a side panel of the other battery pack. Alternatively, when two battery packs are stacked along the first direction, the side panel of one battery pack is connected to a side panel of the other battery pack.

[0016] Based on the description of the above embodiments, the cold plate of the battery pack is connected to the bottom of multiple side plates along the first direction to form a receiving cavity for placing the battery module, the first pad, and the second pad, thus ensuring the safety of the battery pack. When two battery packs are stacked along the first direction, the cold plate or side plate of one battery pack is connected to the side plate of the other battery pack, thereby achieving sealing between the battery packs and between the assembly units.

[0017] In one possible design, multiple first mounting holes are provided on the side panel. Multiple second mounting holes are provided on the cold plate. The positions of the first and second mounting holes correspond one-to-one. When two battery packs are stacked along a first direction, a first connector passes through both the first mounting hole on one battery pack and the second mounting hole on the other battery pack, thus securing the two battery packs together. Alternatively, when two battery packs are stacked along the first direction, a first connector passes through both the first mounting hole on one battery pack and the first mounting hole on the other battery pack, thus securing the two battery packs together.

[0018] Based on the description of the above embodiments, the plurality of first mounting holes provided on the side plate correspond one-to-one with the plurality of second mounting holes provided on the cold plate. The first connector passes through both the first mounting hole on one of the battery packs and the second mounting hole or first mounting hole on the other battery pack, thereby achieving a fixed connection between the battery packs and a fixed connection between the assembly units.

[0019] In one possible design, the top cover has multiple third mounting holes. Multiple fourth mounting holes are located on the top of the multiple assembly units. The positions of the third and fourth mounting holes correspond one-to-one. A second connector passes through both the third and fourth mounting holes, securing the top cover to the top of the multiple assembly units.

[0020] Based on the description of the above embodiments, the plurality of third mounting holes provided on the top cover correspond one-to-one with the plurality of fourth mounting holes provided on the top of the plurality of assembly units. The second connector passes through both the third mounting holes provided on the top cover and the fourth mounting holes provided on the top of the plurality of assembly units, thereby fixing the top cover and the plurality of assembly units together.

[0021] In one possible design, when two battery packs are stacked along the first direction, a sealing ring is provided between the two battery packs.

[0022] Based on the description of the above embodiments, setting a sealing ring between two battery packs can enhance the sealing performance between battery packs and between assembly units.

[0023] Secondly, this application provides an electrical device including the battery system described in the above embodiments. The battery system is used to provide electrical energy.

[0024] The beneficial effects of the battery system provided in the second aspect above can be found in the first aspect and the beneficial effects of various possible embodiments of the first aspect, and will not be repeated here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an exploded view of an assembly unit in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the structure of an assembly unit in an embodiment of this application.

[0028] Figure 3 For this Figure 2 A sectional view along direction A.

[0029] Figure 4 for Figure 2 Isometric side view.

[0030] Figure 5 This is a schematic diagram of the structure of a battery system according to an embodiment of this application.

[0031] Figure 6 This is an exploded view of a battery system according to an embodiment of this application.

[0032] Figure 7 for Figure 5 Top view.

[0033] Figure 8 for Figure 7 A sectional view along direction B.

[0034] Figure 9 for Figure 1 A structural diagram from another perspective.

[0035] Figure 10 for Figure 6 A structural diagram from another perspective.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-battery system;

[0038] 1-Assembly unit;

[0039] 11-Battery pack; 111-Cold plate; 1111-Second mounting hole; 1112-Flow channel; 112-Battery module; 113-First padding material;

[0040] 114 - Side plate; 1141 - First mounting hole;

[0041] 115 - Sealing ring; 116 - Manifold;

[0042] X - First direction. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0045] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other terms. The words "a" or "an" do not exclude the presence of multiple terms.

[0046] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Furthermore, the descriptions of directions such as the X direction, Y direction, and Z direction used to explain the operation and construction of the components in this embodiment are not absolute but relative. Although these directions are appropriate when the components are in the positions shown in the figure, they should be interpreted differently when these positions change to correspond to the changes.

[0050] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0051] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0052] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] An electrical appliance is an electrical device that uses electrical energy to perform a specific function. Electrical appliances can include, but are not limited to, electric bicycles, electric passenger vehicles, electric commercial vehicles, electric heavy trucks, and energy storage cabinets. All of these devices can be powered by battery packs to meet their respective power needs.

[0054] Some electrical devices on the market, such as electric heavy trucks and large equipment like energy storage cabinets, require battery packs with extremely high energy density. Therefore, multiple battery packs can be stacked to form a battery system with high energy density, thereby meeting the power supply needs of these devices.

[0055] In related technologies, battery systems contain a large number of battery packs, which generate a lot of heat when supplying power, making them prone to thermal damage.

[0056] Based on this, this application provides a battery system and an electrical device. By placing a cold plate between two battery packs, the cold plate simultaneously dissipates heat from both battery packs, thereby reducing thermal damage to the battery system caused by the heat generated during power supply and extending the service life of the battery system and the electrical device. The following is in conjunction with... Figure 1-10 Provide a detailed description.

[0057] In a first aspect, this application provides a battery system 100, including: a plurality of assembly units 1 and a top cover (not shown in the figure). The assembly unit 1 includes two battery packs 11 and two cold plates 111. The cold plates 111 are disposed at the bottom of the battery packs 11 along a first direction X. The two battery packs 11 are stacked along the first direction X to form one assembly unit 1, such that one cold plate 111 is located between the two battery packs 11. The battery system 100 includes one or more assembly units 1 stacked along the first direction X, such that another cold plate 111 is located between two adjacent assembly units 1. The top cover is connected to the top of the plurality of assembly units 1 along the first direction X. The first direction X is the height direction of the battery system 100.

[0058] Assembly unit 1 is the basic unit for assembling the battery system 100. For example... Figure 1 As shown, the assembly unit 1 may include two battery packs 11 and two cold plates 111.

[0059] The battery module 112 in the battery pack 11 can convert chemical energy into electrical energy. During the process of converting chemical energy into electrical energy, heat is generated inside the battery pack 11.

[0060] Reference Figure 1 and Figure 2It can be seen that the cold plate 111 is disposed at the bottom of the battery pack 11 along the first direction X, so that the outside of the cold plate 111 contacts the bottom of the battery module 112. Here, the first direction X is the height direction of the battery system 100. (Refer to...) Figure 2 and Figure 3 As can be seen, the cold plate 111 has a flow channel 1112 inside, in which the coolant flows to exchange heat with the heat generated by the battery module 112, thereby achieving heat dissipation and cooling of the battery pack 11. Furthermore, the cold plate 111 can be provided with a coolant inlet and an outlet, allowing the coolant to circulate in the aforementioned flow channel 1112, improving the efficiency of heat exchange and thus accelerating the heat dissipation and cooling speed of the battery pack 11.

[0061] Specifically, the cold plate 111 can be made of aluminum, which has advantages such as good thermal conductivity, low cost, and light weight.

[0062] like Figure 3 As shown, two battery packs 11 are stacked along a first direction X to form an assembly unit 1, such that one of the cold plates 111 is located between the two battery packs 11. For example, as... Figure 3 and Figure 4 As shown, in an assembly unit 1, the upper battery pack 11 is the first battery pack 11, and the lower battery pack 11 is the second battery pack 11. At this time, the cold plate 111 in the first battery pack 11 is located between the first battery pack 11 and the second battery pack 11. The cold plate 111 in the first battery pack 11 can contact the bottom of the battery module 112 in the first battery pack 11, thereby achieving heat dissipation and cooling of the first battery pack 11. Simultaneously, the cold plate 111 in the first battery pack 11 can also contact the top of the battery module 112 in the second battery pack 11, thereby achieving heat dissipation and cooling of the second battery pack 11.

[0063] In other words, the cold plate 111 in the first battery pack 11 can simultaneously dissipate heat and cool down the first battery pack 11 and the second battery pack 11, thereby improving the heat dissipation efficiency of the cold plate 111.

[0064] Furthermore, such as Figure 5 and Figure 6 As shown, the battery system 100 includes one or more assembly units 1 stacked along a first direction X, such that another cold plate 111 is located between two adjacent assembly units 1. For example, as... Figure 6 As shown, in multiple assembly units 1, the second battery pack 11 at the bottom of one assembly unit 1 is connected to the first battery pack 11 at the top of another assembly unit 1. At this time, the cold plate 111 in the second battery pack 11 is located between the second battery pack 11 and the first battery pack 11. Wherein, as... Figure 7 and Figure 8As shown, the cold plate 111 in the second battery pack 11 can contact the bottom of the battery module 112 in the second battery pack 11, thereby achieving heat dissipation and cooling of the second battery pack 11. At the same time, the cold plate 111 in the second battery pack 11 can also contact the top of the battery module 112 in the first battery pack 11, thereby achieving heat dissipation and cooling of the first battery pack 11.

[0065] In other words, the cold plate 111 in the second battery pack 11 can also dissipate heat and cool down the first battery pack 11 and the second battery pack 11 at the same time, further improving the heat dissipation efficiency of the cold plate 111.

[0066] In summary, when multiple assembly units 1 are stacked along the first direction X, the cold plate 111 in the first battery pack 11 and the cold plate 111 in the second battery pack 11 can simultaneously dissipate heat and cool the top and bottom of the battery module 112, thereby greatly improving the heat dissipation speed of the battery pack 11 and extending the service life of the battery system 100 and the electrical device.

[0067] Furthermore, the battery system 100 also includes a top cover. The top cover is connected to the top of the plurality of assembly units 1 along the first direction X, and is used to seal the plurality of assembly units 1, thereby making the battery system 100 a closed system and ensuring the integrity and safety of the battery system 100.

[0068] According to the description in the first aspect, the battery system 100 provided in this application includes multiple assembly units 1 and a top cover. The top cover is used to seal the multiple assembly units 1, thereby making the battery system 100 a closed system, ensuring the integrity and safety of the battery system 100. Two battery packs 11 in an assembly unit 1 are stacked along a first direction X to form one assembly unit 1, with one cold plate 111 located between the two battery packs 11. Simultaneously, in the multiple assembly units 1 stacked along the first direction X, another cold plate 111 is located between two adjacent assembly units 1, allowing the cold plates 111 in the two battery packs 11 to simultaneously dissipate heat and cool the top and bottom of the battery modules 112 in the battery packs 11, thereby greatly improving the heat dissipation speed of the battery packs 11 and extending the service life of the battery system 100 and the electrical device.

[0069] In some embodiments, the battery pack 11 includes a battery module 112, a first pad 113, and a second pad (not shown). The first pad 113 is disposed on top of the battery module 112 along a first direction X. The second pad is disposed on the bottom of the battery module 112 along the first direction X. The first pad 113 is connected to one of the cold plates 111. The second pad is connected to the other cold plate 111. Both the first pad 113 and the second pad are thermally conductive materials, and the first pad 113 is an insulating material.

[0070] like Figure 3 As shown, the battery pack 11 includes a battery module 112, a first pad 113, and a second pad. The battery module 112 converts chemical energy into electrical energy. The first pad 113 can be a thermally conductive material, used to connect the top of the battery module 112 and the cold plate 111, thereby improving the heat exchange efficiency between the top of the battery module 112 and the cold plate 111. Similarly, the second pad can also be a thermally conductive material, used to connect the bottom of the battery module 112 and the cold plate 111, thereby improving the heat exchange efficiency between the bottom of the battery module 112 and the cold plate 111.

[0071] Furthermore, since the top of the battery module 112 is typically provided with a conductive structure (e.g., such as...) Figure 8 (As shown in the diagram, the busbar 116, the pad, and other conductive structures). Therefore, the first pad 113 can be made of a thermally conductive material with insulating properties, thereby preventing short circuits in the battery module 112 and ensuring the safety of the battery pack 11.

[0072] Furthermore, to ensure material consistency, the second padding material can also be made of a thermally conductive material with insulating properties; this application does not specifically limit this. For example, the first padding material 113 and the second padding material can be made of materials such as polyurethane adhesive or silicone rubber.

[0073] Specifically, the first pad 113 is disposed on the top of the battery module 112 along the first direction X, so that the first pad 113 is connected to one of the cold plates 111 of the battery pack 11.

[0074] For example, such as Figure 3 As shown, in an assembly unit 1, the upper battery pack 11 is the first battery pack 11, and the lower battery pack 11 is the second battery pack 11. At this time, the first pad 113 in the second battery pack 11 is connected to the cold plate 111 in the first battery pack 11.

[0075] For example, such as Figure 7 and Figure 8 As shown, in a plurality of assembly units 1, the second battery pack 11 at the bottom of one assembly unit 1 is connected to the first battery pack 11 at the top of another assembly unit 1. At this time, the first pad 113 in the first battery pack 11 is connected to the cold plate 111 in the second battery pack 11.

[0076] Specifically, the second pad is disposed at the bottom of the battery module 112 along the first direction X, so that the second pad is connected to another cold plate 111.

[0077] For example, in an assembly unit 1, the upper battery pack 11 is the first battery pack 11, and the lower battery pack 11 is the second battery pack 11. At this time, the second padding material in the second battery pack 11 is connected to the cold plate 111 in the second battery pack 11.

[0078] For example, in a plurality of assembly units 1, a second battery pack 11 at the bottom of one assembly unit 1 is connected to a first battery pack 11 at the top of another assembly unit 1. At this time, a second padding material in the first battery pack 11 is connected to a cold plate 111 in the first battery pack 11.

[0079] Furthermore, the first pad 113 can be glued to the battery module 112 or the cold plate 111, thereby connecting the battery module 112, the first pad 113, and the cold plate 111. Similarly, the second pad can also be glued to the battery module 112 or the cold plate 111, thereby connecting the battery module 112, the second pad, and the cold plate 111.

[0080] According to the description of the above embodiments, a first pad 113 with thermal conductivity and insulation is provided between the top of the battery module 112 and the cold plate 111, and a second pad with thermal conductivity is provided between the bottom of the battery module 112 and the cold plate 111, which further improves the heat exchange efficiency between the cold plate 111 and the battery module 112, while avoiding short circuits in the battery module 112 and ensuring the safety of the battery pack 11.

[0081] In some embodiments, the thickness of the first padding material 113 in the first direction X is greater than 0.5 mm. Furthermore, the thickness of the first padding material 113 in the first direction X is less than 10 mm.

[0082] The thickness of the first pad material 113 in the first direction X is greater than 0.5 mm, so that the first pad material 113 has sufficient thermal conductivity and insulation properties, thereby ensuring the heat exchange efficiency between the top of the battery module 112 and the cold plate 111 and the safety of the battery pack 11.

[0083] Similarly, the thickness of the first pad 113 in the first direction X is less than 10mm, so as to avoid the thermal conductivity of the first pad 113 being too thick, thereby ensuring the heat exchange efficiency between the top of the battery module 112 and the cold plate 111.

[0084] In summary, the thickness of the first pad 113 in the first direction X is greater than 0.5 mm and less than 10 mm, which can ensure the heat exchange efficiency between the top of the battery module 112 and the cold plate 111 as well as the safety of the battery pack 11.

[0085] In some embodiments, the thickness of the second padding material in the first direction X is greater than 0.5 mm. Furthermore, the thickness of the second padding material in the first direction X is less than 10 mm.

[0086] The thickness of the second pad material in the first direction X is greater than 0.5 mm, so that the second pad material has sufficient thermal conductivity, thereby ensuring the heat exchange efficiency between the bottom of the battery module 112 and the cold plate 111.

[0087] Similarly, the thickness of the second pad in the first direction X is less than 10mm to avoid the thermal conductivity of the second pad being too thick, thereby ensuring the heat exchange efficiency between the bottom of the battery module 112 and the cold plate 111.

[0088] In summary, the thickness of the second pad material in the first direction X is greater than 0.5 mm and less than 10 mm, which can ensure the heat exchange efficiency between the bottom of the battery module 112 and the cold plate 111 as well as the safety of the battery pack 11.

[0089] In some embodiments, such as Figure 8 As shown, the top of the battery module 112 is provided with multiple busbars 116. The first pad 113 is attached to the busbars 116.

[0090] The battery module 112 may include multiple battery cells connected in parallel or in series. A busbar 116 is connected between the multiple battery cells to enable current flow between them.

[0091] For example, a plurality of busbars 116 are provided on the top of the battery module 112 for connecting the current in all the battery cells in the battery module 112. Therefore, the busbars 116 are conductive components provided on the top of the battery module 112. Furthermore, the busbars 116 generate heat when transmitting current.

[0092] Based on this, the first pad 113 is attached to the busbar 116, which can transfer the heat in the busbar 116 to the cold plate 111 to achieve heat exchange, and can also isolate and insulate the busbar 116 and the cold plate 111, thus ensuring the safety of the battery pack 11.

[0093] In some embodiments, the battery pack 11 further includes a battery housing. For example... Figure 9 and Figure 10 As shown, the battery housing includes multiple side panels 114. A cold plate 111 is connected to the bottom of the multiple side panels 114 along the first direction X, so that the multiple side panels 114 and the cold plate 111 form a receiving cavity. The receiving cavity is used to place the battery module 112, the first padding material 113, and the second padding material. When two battery packs 11 are stacked along the first direction X, the cold plate 111 of one battery pack 11 is connected to the side panel 114 of the other battery pack 11. Alternatively, when two battery packs 11 are stacked along the first direction X, the side panel 114 of one battery pack 11 is connected to the side panel 114 of the other battery pack 11.

[0094] like Figure 1 and Figure 6 As shown, the battery housing may include a base plate and a plurality of side plates 114, with the side plates 114 surrounding and connected to the base plate to form a receiving cavity with an opening. For example, as... Figure 1 and Figure 6 As shown, the cold plate 111 in the aforementioned embodiment can serve as the base plate, thereby reducing the number of components in the battery box, decreasing its volume, and improving its integration. Specifically, the battery box may include four side plates 114, and the cold plate 111 may be a rectangular plate with four sides. The bottoms of the four side plates 114 are all connected to the cold plate 111, making the battery box a cuboid cavity. Alternatively, the four sides of the cold plate 111 are respectively connected to the four side plates 114, making the battery box a cuboid cavity.

[0095] The aforementioned cavity can be used to place the battery module 112, the first pad 113, and the second pad, so that the battery box can protect the battery module 112, the first pad 113, and the second pad, preventing the battery module 112 from being damaged or failing due to external factors, thereby ensuring the safety of the battery pack 11.

[0096] Specifically, when the two battery packs 11 are stacked along the first direction X, the two battery packs 11 can include the following two connection relationships:

[0097] Connection relationship one: when the bottom of all four side plates 114 are connected to the cold plate 111, the cold plate 111 of one battery pack 11 is connected to the side plate 114 of another battery pack 11.

[0098] For example, such as Figure 1 and Figure 9 As shown, in an assembly unit 1, the upper battery pack 11 is the first battery pack 11, and the lower battery pack 11 is the second battery pack 11. At this time, the cold plate 111 in the first battery pack 11 is connected to the side plate 114 in the second battery pack 11, so that the cold plate 111 in the first battery pack 11 is used to seal the opening of the receiving cavity in the second battery pack 11, thereby achieving a sealed connection between the two battery packs 11 in one assembly unit 1.

[0099] For example, such as Figure 6 and Figure 10As shown, in a plurality of assembly units 1, the second battery pack 11 at the bottom of one assembly unit 1 is connected to the first battery pack 11 at the top of another assembly unit 1. At this time, the cold plate 111 in the second battery pack 11 is connected to the side plate 114 in the second battery pack 11, so that the cold plate 111 in the second battery pack 11 is used to seal the opening of the receiving cavity in the first battery pack 11, thereby achieving a tight seal between the plurality of assembly units 1.

[0100] Connection relationship two: when the four sides of the cold plate 111 are respectively connected to the four side plates 114, the side plate 114 of one battery pack 11 is connected to the side plate 114 of another battery pack 11.

[0101] In summary, the cold plate 111 of the battery pack 11 is connected to the bottom of multiple side plates 114 along the first direction X, forming a receiving cavity for placing the battery module 112, the first pad 113, and the second pad, thus ensuring the safety of the battery pack 11. When two battery packs 11 are stacked along the first direction X, the cold plate 111 or side plate 114 of one battery pack 11 is connected to the side plate 114 of the other battery pack 11, thereby achieving sealing between the battery packs 11 and between the assembly units 1.

[0102] In some embodiments, the side plate 114 is provided with a plurality of first mounting holes 1141. The cold plate 111 is provided with a plurality of second mounting holes 1111. The positions of the first mounting holes 1141 and the second mounting holes 1111 are one-to-one. When two battery packs 11 are stacked along the first direction X, the first connector passes through the first mounting hole 1141 on one battery pack 11 and the second mounting hole 1111 on the other battery pack 11 simultaneously, so that the two battery packs 11 are fixedly connected. Alternatively, when two battery packs 11 are stacked along the first direction X, the first connector passes through the first mounting hole 1141 on one battery pack 11 and the first mounting hole 1141 on the other battery pack 11 simultaneously, so that the two battery packs 11 are fixedly connected.

[0103] The side plate 114 is provided with a plurality of first mounting holes 1141, and the cold plate 111 is provided with a plurality of second mounting holes 1111. Specifically, the first mounting holes 1141 and the second mounting holes 1111 can be threaded holes of the same specification.

[0104] The positions of the first mounting hole 1141 and the second mounting hole 1111 correspond one-to-one, so that the first connector can pass through both the first mounting hole 1141 and the second mounting hole 1111 simultaneously. The first connector can be a bolt adapted to the aforementioned threaded hole.

[0105] Specifically, when the two battery packs 11 are stacked along the first direction X, the first connector passes through the first mounting hole 1141 on one of the battery packs 11 and the second mounting hole 1111 or the first mounting hole 1141 on the other battery pack 11, so that the two battery packs 11 are fixedly connected.

[0106] For example, such as Figure 1 and Figure 9 As shown, in an assembly unit 1, the upper battery pack 11 is the first battery pack 11, and the lower battery pack 11 is the second battery pack 11. At this time, the second mounting hole 1111 on the first battery pack 11 connects with the first mounting hole 1141 on the second battery pack 11, allowing the first connector to pass through both the second mounting hole 1111 on the first battery pack 11 and the first mounting hole 1141 on the second battery pack 11, thereby achieving a fixed connection between the two battery packs 11 in one assembly unit 1.

[0107] For example, such as Figure 6 and Figure 10 As shown, in a plurality of assembly units 1, the second battery pack 11 at the bottom of one assembly unit 1 is connected to the first battery pack 11 at the top of another assembly unit 1. At this time, the second mounting hole 1111 on the second battery pack 11 is connected to the first mounting hole 1141 on the first battery pack 11, so that the first connector passes through both the second mounting hole 1111 on the second battery pack 11 and the first mounting hole 1141 on the first battery pack 11, thereby achieving a fixed connection between the plurality of assembly units 1.

[0108] In summary, the plurality of first mounting holes 1141 provided on the side plate 114 correspond one-to-one with the plurality of second mounting holes 1111 provided on the cold plate 111. The first connector passes through the first mounting hole 1141 on one of the battery packs 11, and the second mounting hole 1111 or the first mounting hole 1141 on the other battery pack 11, thereby achieving a fixed connection between the battery packs 11 and a fixed connection between the assembly units 1.

[0109] In some embodiments, the top cover is provided with a plurality of third mounting holes (not shown in the figure). The top of the plurality of assembly units 1 is provided with a plurality of fourth mounting holes. The positions of the third and fourth mounting holes correspond one-to-one. The second connector passes through both the third and fourth mounting holes, thereby fixing the top cover to the top of the plurality of assembly units 1.

[0110] The top cover has multiple third mounting holes, and the top of the multiple assembly units 1 has multiple fourth mounting holes. Specifically, the third and fourth mounting holes can be threaded holes of the same specification.

[0111] The third and fourth mounting holes are positioned in a one-to-one correspondence so that the second connector can pass through both the third and fourth mounting holes simultaneously. The second connector can be a bolt adapted to the aforementioned threaded holes.

[0112] Specifically, when the top cover is fastened to the top of the multiple assembly units 1 along the first direction X, the second connector simultaneously passes through the third mounting hole provided on the top cover and the fourth mounting hole provided on the top of the multiple assembly units 1, so that the top cover and the multiple assembly units 1 are fixedly connected.

[0113] Furthermore, the top of the plurality of assembly units 1 is a battery pack 11. When the top cover is fastened to the top of the plurality of assembly units 1 along the first direction X, the top cover is connected to the side plate 114 of the battery pack 11. The battery pack 11 mentioned above is the battery pack 11 disposed on the top of the plurality of assembly units 1.

[0114] Specifically, the fourth mounting hole can directly adopt the multiple first mounting holes 1141 provided on the battery pack 11, so that the first mounting holes 1141 in the battery pack 11 correspond one-to-one with the third mounting holes, so that the second connector can pass through the third mounting hole provided on the top cover and the first mounting hole 1141 provided on the battery pack 11 at the same time, so that the top cover and the multiple assembly units 1 are fixedly connected.

[0115] In summary, the multiple third mounting holes on the top cover correspond one-to-one with the multiple fourth mounting holes on the top of the multiple assembly units 1. The second connector passes through both the third mounting holes on the top cover and the fourth mounting holes on the top of the multiple assembly units 1, thus fixing the top cover and the multiple assembly units 1 together.

[0116] In some embodiments, when two battery packs 11 are stacked along the first direction X, a sealing ring 115 is provided between the two battery packs 11.

[0117] When two battery packs 11 are stacked along the first direction X, a sealing ring 115 is provided between the two battery packs 11 to enhance the sealing between the battery packs 11. The sealing ring 115 can be foamed silicone or EPDM (ethylene propylene diene monomer rubber), and this application does not specifically limit it.

[0118] For example, such as Figure 9 As shown, in an assembly unit 1, the upper battery pack 11 is the first battery pack 11, and the lower battery pack 11 is the second battery pack 11. At this time, a sealing ring 115 is provided between the cold plate 111 of the first battery pack 11 and the side plate 114 of the second battery pack 11, thereby enhancing the sealing between the two battery packs 11 in an assembly unit 1.

[0119] For example, such as Figure 10As shown, in a plurality of assembly units 1, the second battery pack 11 at the bottom of one assembly unit 1 is connected to the first battery pack 11 at the top of another assembly unit 1. At this time, a sealing ring 115 is provided between the cold plate 111 on the second battery pack 11 and the side plate 114 on the first battery pack 11, thereby enhancing the sealing between the plurality of assembly units 1.

[0120] In summary, by setting a sealing ring 115 between the two battery packs 11, the sealing performance between the battery packs 11 and between the assembly units 1 can be enhanced.

[0121] Secondly, this application provides an electrical device including the battery system described in the above embodiments. The battery system is used to provide electrical energy.

[0122] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0123] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery system, characterized in that, include: Multiple assembly units and a top cover; The assembly unit includes two battery packs and two cold plates; The cold plate is disposed at the bottom of the battery pack along the first direction; The two battery packs are stacked along the first direction to form an assembly unit, such that one of the cold plates is located between the two battery packs; The battery system includes one or more assembly units stacked along the first direction, such that another cold plate is located between two adjacent assembly units; The top cover is connected to the top of the plurality of assembly units along the first direction; The first direction is the height direction of the battery system.

2. The battery system according to claim 1, characterized in that, The battery pack includes a battery module, a first padding material, and a second padding material; The first pad is disposed on top of the battery module along the first direction; The second padding material is disposed at the bottom of the battery module along the first direction; The first padding material is connected to one of the cold plates; The second padding material is connected to another of the aforementioned cold plates; Both the first pad and the second pad are thermally conductive materials, and the first pad is an insulating material.

3. The battery system according to claim 2, characterized in that, The thickness of the first padding material in the first direction is greater than 0.5 mm; Furthermore, the thickness of the first padding material in the first direction is less than 10 mm.

4. The battery system according to claim 3, characterized in that, The thickness of the second padding material in the first direction is greater than 0.5 mm; Furthermore, the thickness of the second padding material in the first direction is less than 10 mm.

5. The battery system according to claim 4, characterized in that, The top of the battery module is provided with multiple busbars; The first padding material is attached to the busbar.

6. The battery system according to claim 5, characterized in that, The battery pack also includes the battery housing; The battery housing includes multiple side panels; The cold plate is connected to the bottom of the plurality of side plates along the first direction, so that the plurality of side plates and the cold plate form a receiving cavity; The cavity is used to house the battery module, the first padding material, and the second padding material; When two battery packs are stacked along the first direction, the cold plate of one battery pack is connected to the side plate of the other battery pack; or; When two battery packs are stacked along the first direction, the side panel of one battery pack is connected to the side panel of the other battery pack.

7. The battery system according to claim 6, characterized in that, The side plate is provided with a plurality of first mounting holes; The cold plate is provided with multiple second mounting holes; The positions of the first mounting hole and the second mounting hole correspond one-to-one; When the two battery packs are stacked along the first direction, the first connector passes through the first mounting hole on one of the battery packs and the second mounting hole on the other battery pack, so that the two battery packs are fixedly connected. or; When the two battery packs are stacked along the first direction, the first connector passes through the first mounting hole on one of the battery packs and the first mounting hole on the other battery pack simultaneously, so that the two battery packs are fixedly connected.

8. The battery system according to claim 7, characterized in that, The upper cover is provided with multiple third mounting holes; The top of each of the multiple assembly units is provided with multiple fourth mounting holes; The positions of the third mounting hole and the fourth mounting hole correspond one-to-one; The second connector passes through both the third and fourth mounting holes, thus securing the top cover to the top of the plurality of assembly units.

9. The battery system according to any one of claims 1-8, characterized in that, When two battery packs are stacked along the first direction, a sealing ring is provided between the two battery packs.

10. An electrical device, characterized in that, Includes the battery system according to any one of claims 1-9; The battery system is used to provide electrical energy.

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