Battery and electric device

Abstract

A battery (10) and an electric device. The battery (10) comprises: a case; at least one group of battery cells (11), each group of battery cells (11) comprising a plurality of battery cells (11) arranged in a first direction; and a pressing strip (12), wherein a channel for accommodating a liquid is provided in the pressing strip (12), and the pressing strip (12) extends in a first direction and is connected to the plurality of battery cells (11).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202420053079.3 and application date of January 9, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] In related technologies, in order to improve the structural strength of the battery, a pressure strip structure is provided in the middle or shoulder of the battery cell, which is connected to the battery cell through the pressure strip to improve the main vibration frequency of the battery and the anti-expansion strength of the battery.

[0005] However, in order for the bead to provide sufficient structural strength, it needs to have a certain width, so that the bead occupies a large space on the top of the battery cell, resulting in tight space for the arrangement of other structures such as the tabs, affecting the assembly of other components.

[0006] Summary of the Invention

[0007] The present application provides a battery and an electrical device to solve the technical problem that the top space of the battery cell is tight due to the large width of the pressure strip, which affects the assembly of other components.

[0008] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0009] Box;

[0010] At least one group of battery cells is installed in the box, each group of battery cells includes a plurality of battery cells arranged along a first direction;

[0011] A pressure strip is provided with a channel for accommodating liquid, and the pressure strip extends along the first direction and is connected to the plurality of battery cells.

[0012] In the above technical solution, by providing a channel for accommodating liquid in the bead, the bead can enhance the anti-expansion strength while allowing coolant to circulate in the channel of the bead, thereby playing a role in thermal management of the battery cells. There is no need to arrange the bead and thermal management components separately, thereby optimizing the spatial layout inside the battery and improving space utilization.

[0013] In some embodiments, the battery further comprises:

[0014] A thermal management system is installed in the box, the thermal management system is used for heat exchange with the battery cells, and the thermal management system is communicated with the channel.

[0015] In the above technical solution, by connecting the thermal management system with the channel, the coolant in the thermal management system can flow into the channel, so that the coolant in the channel can circulate, improve the heat exchange effect, and provide pressure to the coolant in the channel.

[0016] In some embodiments, an end portion of the pressure strip in the first direction extends out of the battery cell, a connector assembly is provided at the end portion of the pressure strip, and the channel is connected to the thermal management system through the connector assembly.

[0017] In the above technical solution, a joint assembly is provided to facilitate connection of the channel in the pressure strip with the thermal management system, thereby achieving communication of the coolant.

[0018] In some embodiments, the battery comprises:

[0019] A beam structure is provided on one side of a group of battery cells in a first direction;

[0020] The connecting ears are provided at positions corresponding to the pressure strip and the beam structure and extend laterally along the pressure strip. The pressure strip is connected to the beam structure through the connecting ears.

[0021] In the above technical solution, the structural strength of the pressure strip is improved by connecting the pressure strip to the beam structure, and by providing connecting ears, the pressure strip has little impact on its own structure and sealing when connected to the beam structure, and the structural strength is high.

[0022] In some embodiments, a plurality of the pressure strips are distributed along a second direction, at least one of the pressure strips is connected to the box body, and the second direction intersects with the first direction.

[0023] In the above technical solution, multiple pressure strips distributed along the second direction are provided to improve the connection strength of multiple battery cells and improve the overall anti-expansion strength; by connecting at least one pressure strip to the box body, the connection strength of the pressure strip is further improved and the stability is higher.

[0024] In some embodiments, the wall thickness M1 of the layering strip satisfies:

[0025] 0.5mm≤M1≤3.5mm.

[0026] In the above technical solution, by limiting the wall thickness of the bead, the bead has sufficient structural strength while ensuring the heat exchange effect of the coolant in the channel, and the space occupied by the bead in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0027] In some embodiments, the thickness M2 of the channel in the direction close to and away from the battery cell satisfies:

[0028] 1mm≤M2≤6mm.

[0029] In the above technical solution, by limiting the thickness of the channel, the flow pressure drop of the coolant in the channel is controlled within a certain range, so that the coolant can flow smoothly, and the space occupied by the pressure strip in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0030] In some embodiments, the layer comprises:

[0031] A spraying bead is provided corresponding to the explosion-proof valves of the plurality of battery cells, and a side of the spraying bead close to the battery cell is configured to melt through when the explosion-proof valve is opened.

[0032] In the above technical solution, by setting up spray strips, the spray strips can not only strengthen the structural strength, but also melt through and spray out the coolant in its channel in the event of thermal runaway of the battery cell to control the thermal runaway and improve the safety performance of the battery.

[0033] In some embodiments, the width of the spray bead is greater than the width of the explosion-proof valve.

[0034] In the above technical solution, the width of the spray bead is set to be greater than the width of the explosion-proof valve so that the spray bead can cover the explosion-proof valve, thereby improving the spray cooling effect.

[0035] In some embodiments, the battery cell includes an end cover, the explosion-proof valve is installed on the end cover, and the spray strip is bonded to the end cover.

[0036] In the above technical solution, the spray strip is bonded to the end cover so that the connection position of the spray strip avoids the explosion-proof valve as much as possible to prevent the external structure of the explosion-proof valve from being affected by the strong bonding force.

[0037] In some embodiments, the spray strip is made of plastic.

[0038] In the above technical solution, the spray strip is made of plastic, which saves costs and can melt through more quickly in the event of thermal runaway of the battery cell.

[0039] In some embodiments, the spray strip is made of metal, and a through hole is provided on the side of the spray strip facing the explosion-proof valve, which is opposite to the explosion-proof valve. A seal for sealing the through hole is provided in the through hole, and the seal is configured to release the seal of the through hole when the explosion-proof valve is opened.

[0040] In the above technical solution, the structural strength of the spray strip is improved by setting the spray strip to a metal material, and by setting a through hole and a seal, when the thermal runaway explosion-proof valve of the battery cell is opened, the seal can be quickly released to allow the coolant to spray out.

[0041] In some embodiments, the battery further comprises:

[0042] The FPC is arranged along the first direction and is provided on a side of the spraying strip away from the battery cell.

[0043] In the above technical solution, the FPC is arranged on the spray strip to optimize the space layout and improve the space utilization.

[0044] In some embodiments, the layer comprises:

[0045] A cold pipe bead is bonded to one end of the end covers of the plurality of battery cells in the second direction.

[0046] In the above technical solution, by providing the cold pipe bead, the overall structural strength is improved and a thermal management function for the battery cells can be performed.

[0047] In some embodiments, the battery includes a plurality of groups of battery cells arranged along the second direction, and the ends of the end caps of two adjacent groups of battery cells that are close to each other are bonded to one of the cold pipe strips.

[0048] In the above technical solution, a cooling pipe strip located between the two groups of battery cells is connected to the two groups of battery cells respectively, thereby improving the structural strength while optimizing the spatial layout and improving the space utilization.

[0049] In some embodiments, the cold pipe bead is made of metal or non-metal material.

[0050] In some embodiments, the layer comprises:

[0051] Spraying beadings, the spraying beadings being provided corresponding to the explosion-proof valves of the plurality of battery cells;

[0052] A cold pipe bead is bonded to both ends of the end covers of the plurality of battery cells in the second direction.

[0053] In the above technical solution, by providing spray strips and cold pipe strips, the overall structural strength is improved while the thermal management effect and the safety performance of the battery are improved.

[0054] In a second aspect, an embodiment of the present application provides an electrical device, including:

[0055] The battery as described in any embodiment of the first aspect is used to power the electrical device.

[0056] In the above technical solution, by using a battery as in any embodiment of the first aspect, the stability and safety of the use of the electrical device are assisted to be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0058] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0059] FIG2 is a schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0060] Figure 3 is an enlarged view of point A in Figure 2;

[0061] FIG4 is a second schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0062] FIG5 is a third schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0063] FIG6 is a fourth schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0064] FIG7 is an enlarged view of point B in FIG6;

[0065] FIG8 is a schematic diagram of a partial cross-sectional structure of a battery provided in some embodiments of the present application;

[0066] FIG9 is a schematic diagram of the cross-sectional structure of a layering strip provided in some embodiments of the present application.

[0067] Reference numerals:

[0068] Vehicle 1, battery 10, motor 20, controller 30;

[0069] Battery cell 11, end cover 110, explosion-proof valve 111;

[0070] Bead 12, spray bead 121, cold pipe bead 122, joint assembly 123, connection assembly 124, connection ear 1241, sleeve 125, support structure 126;

[0071] Thermal management system 13, beam structure 14, FPC 15. DETAILED DESCRIPTION

[0072] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0073] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0074] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0076] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0077] The term "multiple" in this application 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).

[0078] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. The battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0079] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. A battery generally includes a casing that encloses one or more battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0080] A battery cell includes a casing, an electrode assembly, and an electrolyte. The casing is used to hold the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0081] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0082] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and important role. A battery consists of a housing and multiple cells housed within it. As a core component in new energy vehicles, batteries have high requirements for both safety and cycle life.

[0083] In typical batteries, to enhance structural strength, a pressure strip is installed in the middle or shoulder of a battery cell. This strip connects to the battery cell, increasing the battery's primary vibration frequency and anti-expansion strength. However, to ensure sufficient structural strength, the strip must be a certain width, which occupies a significant amount of space on top of the battery cell. This can lead to limited space for other components, such as the spargers and sampling assembly. This can also hinder assembly of other components, such as a spray assembly.

[0084] Based on the above considerations, in order to solve the technical problem that the top space of the battery cell is tight due to the large width of the bead, which affects the assembly of other components, the present application designs a battery, including a box body, at least one group of battery cells and a bead, each group including multiple battery cells arranged along a first direction, a channel for accommodating liquid is provided in the bead, and the bead extends along the first direction and is connected to multiple battery cells.

[0085] In a battery of this structure, by providing a channel for containing liquid in the molding, the molding can not only enhance the anti-expansion strength, but also allow coolant to circulate in the channel of the molding, thereby performing thermal management for the battery cells. This eliminates the need to arrange the molding and thermal management components separately, thereby optimizing the internal space layout of the battery and improving space utilization.

[0086] The batteries disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery thermal management system disclosed in this application and batteries can be used to form such electrical devices. This helps expand the scope of application of the battery thermal management system and reduces the difficulty of assembling the battery thermal management system.

[0087] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0088] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device according to an embodiment of the present application.

[0089] As shown in Figure 1, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 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 20, a controller 30 and a battery 10 can be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 20. For example, a battery 10 can be provided at the bottom, front or rear of the vehicle 1. The battery 10 can be used to power the vehicle 1. For example, the battery 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery 10 can not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0090] In order to meet different power requirements, the battery 10 may include a plurality of battery cells 11 , wherein the plurality of battery cells 11 may be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series and parallel connection.

[0091] Figure 2 shows an exploded view of a battery 10 according to one embodiment of the present invention. The battery 10 comprises a housing and a plurality of battery cells 11, which are housed within the housing. The housing provides assembly space for the battery cells 11 and can be constructed in a variety of configurations.

[0092] In some embodiments, the housing may include a first housing body and a second housing body, the first housing body and the second housing body covering each other, and the first housing body and the second housing body jointly defining an assembly space for accommodating the battery cells 11. The second housing body may be a hollow structure with one end open, and the first housing body may be a plate-like structure, with the first housing body covering the open side of the second housing body, so that the first housing body and the second housing body jointly define an assembly space; the first housing body and the second housing body may also be hollow structures with one end open, with the open side of the first housing body covering the open side of the second housing body. Of course, the housing formed by the first housing body and the second housing body can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0093] In the battery 10, multiple battery cells 11 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 11. Multiple battery cells 11 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire structure of the multiple battery cells 11 is housed within a housing. Of course, the battery 10 can also be constructed by first connecting multiple battery cells 11 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a complete structure, which is then housed within a housing. The battery 10 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 11.

[0094] Each battery cell 11 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 11 can be cylindrical, flat, rectangular, or in other shapes. For example, in FIG1 , the battery cell 11 is in the shape of a rectangular parallelepiped.

[0095] According to some embodiments of the present application, as shown in FIG. 2 to FIG. 8 , the present application provides a battery 10 , which includes a box, at least one group of battery cells 11 and a pressure strip 12 .

[0096] The box has an assembly space for accommodating battery cells 11. At least one group of battery cells 11 is installed in the assembly space. Each group of battery cells 11 includes multiple battery cells 11 arranged along a first direction. The arrangement of multiple battery cells 11 increases the capacity of the battery 10.

[0097] A channel for accommodating liquid is defined in the pressure strip 12 . The pressure strip 12 extends along a first direction and is connected to the plurality of battery cells 11 .

[0098] In this embodiment, a channel for accommodating liquid is provided in the pressure strip 12 so that coolant or other liquid can flow in the channel. For example, when coolant flows in the channel, it can play a role in thermal management of the battery cell 11 and improve the working stability of the battery cell 11.

[0099] By extending the bead 12 along the first direction, the bead 12 can be connected to a group of battery cells 11 arranged along the first direction, thereby improving the structural stability of the group of multiple battery cells 11 and improving the anti-expansion strength. In one example, the extension direction of the channel in the bead 12 can be set along the extension direction of the bead 12, which can reduce the processing difficulty of the bead 12 and reduce production costs. In other examples, the channel in the bead 12 can be set in other shapes, such as regular shapes such as corrugations or broken lines, or irregular shapes, so as to speed up or slow down the flow rate in the channel, and increase or reduce the structural strength of some positions of the bead 12. It will be understood that the shape of the channel is not specifically limited here.

[0100] In this embodiment, to reduce the space occupied by the bead 12, the bead 12 can be flat, making it easier for the bead 12 to adhere to the surface of the battery cell 11. This also increases the connection area and heat exchange area, improving the connection strength and heat exchange efficiency. The bead 12 and the battery cell 11 can be bonded using a thermally conductive adhesive with good thermal conductivity to improve thermal conductivity.

[0101] According to the embodiment of the present application, a channel for accommodating liquid is provided in the bead 12, so that the bead 12 can enhance the anti-expansion strength while allowing coolant to circulate in the channel of the bead 12, thereby performing thermal management for the battery cell 11. There is no need to arrange the bead 12 and the thermal management component separately, thereby optimizing the spatial layout inside the battery 10 and improving space utilization.

[0102] According to some embodiments of the present application, as shown in Figures 4 and 5, the battery 10 may further include a thermal management system 13. The thermal management system 13 may be installed in the box, the thermal management system 13 may be used for heat exchange with the battery cell 11, and the thermal management system 13 may be connected to the channel.

[0103] The thermal management system 13 may include a heat exchange assembly installed within the housing. Coolant circulates within the heat exchange assembly, exchanging heat with the battery cells 11 through the heat exchange assembly, thereby improving the operational stability of the battery cells 11. The heat exchange assembly may communicate with the channels of the pressure strip 12, allowing the coolant circulating within the heat exchange assembly to flow into the channels. This allows the pressure strip 12 to assist the thermal management system 13 in thermally managing the battery cells 11. Furthermore, the coolant in the thermal management system 13 can provide pressure to the coolant within the channels, driving the coolant to circulate and improving the heat exchange effect.

[0104] According to an embodiment of the present application, the thermal management system 13 is connected to the channel so that the coolant in the thermal management system 13 can flow into the channel, so that the coolant in the channel can circulate, improve the heat exchange effect, and provide pressure to the coolant in the channel.

[0105] According to some embodiments of the present application, as shown in Figures 4 and 5, the end of the pressure strip 12 in the first direction can extend out of the battery cell 11, and the end of the pressure strip 12 can be provided with a connector assembly 123, and the channel can be connected to the thermal management system 13 through the connector assembly 123.

[0106] In this embodiment, the end of the pressure strip 12 in the first direction can extend out of the battery cell 11 and be sealed, and a connector assembly 123 can be provided on the side of the battery cell 11 facing the end of the pressure strip 12 extending out of the battery cell 11. The connector assembly 123 can be connected to the pipeline of the thermal management system 13. For example, the connector assembly 123 can be a quick-connect connector, etc., which is easy to install and connect and automatically cuts off the circuit when the connector assembly 123 is disconnected, and the coolant is not easy to leak.

[0107] By providing the joint assembly 123 , the channel in the pressure strip 12 is connected to the thermal management system 13 , thereby achieving communication of the coolant.

[0108] According to some embodiments of the present application, as shown in Figures 4 and 5, the battery 10 may include a beam structure 14 and a connecting ear 1241. The beam structure 14 may be arranged on one side of a group of battery cells 11 in a first direction. The connecting ear 1241 may be arranged at a position corresponding to the pressure strip 12 and the beam structure 14 and extend laterally along the pressure strip 12. The pressure strip 12 may be connected to the beam structure 14 through the connecting ear 1241.

[0109] In this embodiment, the beam structure 14 can be a supporting beam arranged in the box body or a frame beam constituting the box body frame structure. For example, the beam structure 14 can be an expansion beam in the box body. By setting the beam structure 14 on one side of a group of battery cells 11 in the first direction, it can play a role in suppressing the expansion of the battery cells 11.

[0110] The end of the bead 12 in the first direction can extend beyond the battery cell 11 and to the expansion beam. The connecting ear 1241 is provided on the bead 12 and is located at a position corresponding to the bead 12 and the beam structure 14. The connecting ear 1241 is connected to the bead 12 and extends laterally along the bead 12. By fixing the connecting ear 1241 to the expansion beam, the bead 12 and the expansion beam are fixedly connected. The connecting ear 1241 can be connected by bolt connection, adhesive connection, or snap connection, etc., which are not limited here.

[0111] In one example, the connecting ear 1241 can be integrally provided with the pressure strip 12 .

[0112] In another example, as shown in Figures 4 and 5, the battery 10 may include a connecting component 124, which may be arranged in a "F" shape so that the connecting component 124 forms two connecting ears 1241, and a socket 125 may be provided at the position corresponding to the bead 12 and the beam structure 14. The socket 125 is sleeved outside the bead 12, which can enhance the bearing capacity of the bead 12 at the corresponding position, and the connecting component 124 is provided on the side of the socket 125 away from the beam structure 14 to apply a pressing force toward the beam structure 14 to the socket 125, thereby fixing the bead 12 to the beam structure 14. By providing the socket 125 and the connecting component 124, while fixing the bead 12 to the beam structure 14, the force directly acting on the bead 12 is small, the bead 12 is not easy to collapse, and the structural strength of the bead 12 is little affected. There is no need to open a connecting hole on the bead 12, which has little effect on its sealing.

[0113] According to the embodiment of the present application, the structural strength of the bead 12 is improved by connecting the bead 12 to the beam structure 14. By providing the connecting ear 1241, when the bead 12 is connected to the beam structure 14, the structure and sealing of the bead 12 itself are less affected, and the structural strength is high.

[0114] In some embodiments, as shown in Figures 4 and 5, an expansion beam is extended from the end of the bead 12 in the first direction, and a joint assembly 123 is provided on the portion of the bead 12 extending from the expansion beam. The portion of the bead 12 extending from the expansion beam is also provided with a support structure 126. The support structure 126 is connected to one side of the bead 12 and is fixedly connected to the side wall of the expansion beam away from the battery cell 11 to provide support for the bead 12. When the bead 12 is connected to the pipeline of the thermal management system 13 through the joint assembly 123, the tension or pressure applied to the bead 12 is not easy to cause the bead 12 to deform, thereby ensuring the smooth flow of the channel in the bead 12 as well as the overall structural strength and stability in use.

[0115] According to some embodiments of the present application, as shown in FIG. 2 , FIG. 3 and FIG. 6 , a plurality of pressure strips 12 may be provided distributed along the second direction, at least one pressure strip 12 may be connected to the box body, and the second direction may intersect with the first direction.

[0116] In this embodiment, a plurality of pressure strips 12 may be provided, and the plurality of pressure strips 12 may be distributed along a second direction, which intersects with the first direction, so that the plurality of pressure strips 12 may be respectively connected to the end caps 110 of the battery cells 11 at respective positions in the second direction, so as to enhance the structural strength of each group of battery cells 11 and further enhance the anti-expansion strength of the battery 10.

[0117] At least one of the plurality of pressure strips 12 may be connected to the box body. By connecting the pressure strip 12 to the structural components of the box body, the structural strength of the pressure strip 12 and the overall structure is improved, further improving the anti-expansion strength of the battery 10.

[0118] It should be noted that the number of pressure strips 12 is not limited here. The number of battery cells 11 and the overall spatial layout can be two or more. When there are more than two pressure strips 12, multiple pressure strips 12 can be alternately connected to the box body along the second direction, or the corresponding pressure strips 12 can be connected to the box body in a symmetrical manner along the second direction to make the force more balanced and improve stability.

[0119] In the embodiment of the present application, a plurality of pressure strips 12 distributed along the second direction are provided to improve the connection strength of the plurality of battery cells 11 and improve the overall anti-expansion strength; by connecting at least one pressure strip 12 to the box body, the connection strength of the pressure strip 12 is further increased and the stability is higher.

[0120] According to some embodiments of the present application, as shown in FIG9 , the wall thickness M1 of the layering strip 12 may satisfy:

[0121] 0.5mm≤M1≤3.5mm.

[0122] It can be understood that the thicker the wall thickness of the bead 12, the higher the strength. However, considering the thermal management performance of the bead 12, the thickness of the bead 12 should not be too large. By limiting the wall thickness of the bead 12, the bead 12 has sufficient structural strength while ensuring the heat exchange effect of the coolant in the channel, and the space occupied by the bead 12 in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0123] The wall thickness M1 of the layering strip 12 has a value range of [0.5mm-3.5mm]. Specifically, the wall thickness M1 of the layering strip 12 can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm or other values ​​between 0.5mm and 3.5mm.

[0124] According to some embodiments of the present application, as shown in FIG9 , the thickness M2 of the channel in the direction close to and away from the battery cell 11 may satisfy:

[0125] 1mm≤M2≤6mm.

[0126] By limiting the thickness of the channel, the flow pressure drop of the coolant in the channel is controlled within a certain range, so that the coolant can flow smoothly, and the space occupied by the layering strip 12 in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0127] Among them, the thickness M2 of the channel in the direction close to and away from the battery cell 11 has a value range of [1mm-6mm]. Specifically, M2 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm or other values ​​between 1mm-6mm.

[0128] According to the embodiment of the present application, the wall thickness of the bead 12 is limited so that the bead 12 has sufficient structural strength while the space occupied by the bead 12 in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0129] According to some embodiments of the present application, as shown in Figures 6 to 8, the pressure strip 12 may include a spray pressure strip 121, which may be arranged corresponding to the explosion-proof valves 111 of multiple battery cells 11, and the side of the spray pressure strip 121 close to the battery cell 11 may be configured to melt through when the explosion-proof valve 111 is opened.

[0130] In this embodiment, the spray bead 121 can be provided corresponding to the explosion-proof valve 111 of a group of multiple battery cells 11, so that the spray bead 121 can spray coolant on the battery cell 11 to reduce the temperature when the battery cell 11 suffers from thermal runaway.

[0131] In actual implementation, the side of the spray strip 121 close to the battery cell 11 can be configured to melt through when the explosion-proof valve 111 is opened. In the event of thermal runaway of the battery cell 11, the explosion-proof valve 111 opens and sprays out high-temperature flue gas. The high-temperature flue gas can quickly melt through the spray strip 121 toward the side of the battery cell 11. Because the channel of the spray strip 121 is connected to the thermal management system 13, the thermal management system 13 can provide pressure to the coolant in the spray strip 121 so that the coolant in the spray strip 121 is quickly sprayed out from the melt-through position to the open expansion valve to cool the battery cell 11.

[0132] According to the embodiment of the present application, a spray bead 121 is provided. While strengthening the structural strength, when the battery cell 11 experiences thermal runaway, the spray bead 121 can melt through and spray out the coolant in its channel to control the thermal runaway, thereby improving the safety performance of the battery 10.

[0133] According to some embodiments of the present application, as shown in Figure 8, the width of the spray strip 121 is greater than the width of the explosion-proof valve 111. By setting the width of the spray strip 121 to be greater than the width of the explosion-proof valve 111, the spray strip 121 can cover the explosion-proof valve 111, thereby improving the spray cooling effect.

[0134] According to some embodiments of the present application, as shown in FIG. 8 , the battery cell 11 may include an end cover 110 , the explosion-proof valve 111 may be installed on the end cover 110 , and the spray bead 121 may be bonded to the end cover 110 .

[0135] In this embodiment, the end cap 110 may be the end cap 110 on the side of the battery cell 11 provided with the terminal column, and the explosion-proof valve 111 may be mounted on the end cap 110. By bonding the spray bead 121 to the end cap 110 so that the spray bead 121 and the explosion-proof valve 111 are directly opposite each other, the spray bead 121 can be melted through when the explosion-proof valve 111 is opened.

[0136] Among them, because the end face strength of the explosion-proof valve 111 is relatively weak, although the spray bead 121 is directly opposite to the explosion-proof valve 111, when the spray bead 121 is assembled, the adhesive is applied to the end cover 110 around the explosion-proof valve 111, so that the spray bead 121 is actually bonded to the end cover 110, so that the force generated when the spray bead 121 is deformed under load directly acts on the end cover 110, which has little impact on the end face of the explosion-proof valve 111, is not easy to damage the explosion-proof valve 111, and improves the structural stability.

[0137] According to the embodiment of the present application, the spray strip 121 is bonded to the end cover 110 so that the connection position of the spray strip 121 avoids the explosion-proof valve 111 as much as possible to prevent the external structure of the explosion-proof valve 111 from being affected by the strong bonding force.

[0138] According to some embodiments of the present application, the spray bead 121 can be made of plastic. By setting the spray bead 121 to be made of plastic, costs can be saved and the spray bead 121 can be melted through more quickly in the event of thermal runaway of the battery cell 11. The materials of the spray bead 121 include but are not limited to PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), PS (polystyrene), etc.

[0139] According to some embodiments of the present application, the spray strip 121 can be made of metal, and the side of the spray strip 121 facing the explosion-proof valve 111 can be provided with a through hole directly opposite to the explosion-proof valve 111. A seal for sealing the through hole can be provided in the through hole, and the seal can be configured to release the seal of the through hole when the explosion-proof valve 111 is opened.

[0140] In this embodiment, the spray bead 121 is made of metal to enhance its structural strength and improve the anti-expansion strength of the battery 10. The through-hole can communicate with the channel within the spray bead 121. By providing a through-hole in the spray bead 121 and a sealant in the through-hole, the channel is sealed when the sealant seals the through-hole, allowing the coolant to flow normally. In the event of thermal runaway of the battery cell 11 and the explosion-proof valve 111 opening, the sealant can release the seal on the through-hole, allowing the through-hole to open and the coolant in the channel to be sprayed out through the through-hole to the explosion-proof valve 111.

[0141] In one example, the seal can be made of plastic so that the high-temperature flue gas can quickly melt the seal, causing the seal to release the seal of the through hole. In another example, the seal can also be a thermal switch that actively releases the seal of the through hole when exposed to high-temperature flue gas.

[0142] According to the embodiment of the present application, the spray strip 121 is made of metal to improve the structural strength of the spray strip 121. By providing through holes and seals, when the thermal runaway explosion-proof valve 111 of the battery cell 11 is opened, the seal can be quickly released to allow the coolant to spray out.

[0143] According to some embodiments of the present application, as shown in Figures 2, 3, 6, and 7, the battery 10 may further include an FPC 15, which is arranged along the first direction and is disposed on a side of the spray bead 121 facing away from the battery cell 11. The FPC 15 may be bonded to the spray bead 121 or connected by a snap fastener, the details of which are not limited herein. By disposing the FPC 15 on the spray bead 121, the spatial layout is optimized and space utilization is improved.

[0144] According to some embodiments of the present application, as shown in FIG. 6 and FIG. 7 , the bead 12 may include a cold pipe bead 122 . The cold pipe bead 122 may be bonded to one end of the end caps 110 of the plurality of battery cells 11 in the second direction.

[0145] In this embodiment, the bead 12 may include a cold pipe bead 122. A coolant flows through the channel of the cold pipe bead 122, so that the cold pipe bead 122 can exchange heat with the battery cell 11, thereby assisting in thermal management of the battery cell 11. The cold pipe bead 122 is bonded to the shoulder of the battery cell 11. The shoulder of the battery cell 11 is also the two ends of the end cap 110 of the battery cell 11 in the second direction. By bonding the cold pipe bead 122 to one shoulder of the battery cell 11, the anti-expansion strength of the battery 10 can be increased without affecting the assembly of components such as the terminal post and tab on the end cap 110.

[0146] According to the embodiment of the present application, by providing the cold pipe bead 122 , the overall structural strength is improved while thermal management of the battery cell 11 is performed.

[0147] According to some embodiments of the present application, as shown in FIG. 6 , the battery 10 may include multiple groups of battery cells 11 arranged along the second direction, and the end caps 110 of two adjacent groups of battery cells 11 , which are close to each other, are bonded to a cold pipe strip 122 .

[0148] To increase the capacity of the battery 10 and optimize the layout of the battery cells 11 , the battery 10 may include multiple groups of battery cells 11 arranged along the second direction, and the side walls of two adjacent groups of battery cells 11 may be connected or spaced a certain distance apart.

[0149] The ends of the end caps 110 of two adjacent battery cell groups 11 that are close to each other are bonded to the same cooling pipe bead 122 to reduce the number of cooling pipe bead 122 when multiple battery cell groups 11 are provided and optimize the spatial layout.

[0150] According to the embodiment of the present application, a cold pipe bead 122 located between the two groups of battery cells 11 is connected to the two groups of battery cells 11 respectively, thereby improving the structural strength while optimizing the spatial layout and improving space utilization.

[0151] According to some embodiments of the present application, the cold pipe bead 122 can be made of metal or non-metal. In this embodiment, the cold pipe bead 122 primarily serves to increase the anti-expansion strength of the battery 10 and assist in thermal management. Therefore, the material of the cold pipe bead 122 includes, but is not limited to, metal materials with good thermal conductivity, such as iron and aluminum alloy, or non-metal materials with good thermal conductivity, such as polyimide and polyamide.

[0152] According to some embodiments of the present application, as shown in Figures 6 and 7, the molding 12 may include a spray molding 121 and a cold pipe molding 122. The spray molding 121 can be arranged corresponding to the explosion-proof valve 111 of a group of multiple battery cells 11; the cold pipe molding 122 can be bonded to one end of the end cover 110 of the multiple battery cells 11 in the second direction.

[0153] In this embodiment, the explosion-proof valve 111 of the battery cell 11 is arranged in the middle of the end cover 110 in the second direction, so that the spray bead 121 is connected to the middle of the end cover 110 in the second direction, and the cold pipe bead 122 is connected to one end of the end cover 110 in the second direction. By arranging the spray bead 121 and the cold pipe bead 122, the overall structural strength is improved while the thermal management effect and the safety performance of the battery 10 are improved.

[0154] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 1010 of any of the above solutions, and the battery 1010 is used to provide electrical energy to the electrical device.

[0155] According to the electric device of the embodiment of the present application, by using the battery 10 of any of the above technical solutions, the stability and safety of the electric device can be improved.

[0156] The power-consuming device may be any of the aforementioned devices or systems using the battery 1010 .

[0157] According to some embodiments of the present application, referring to FIG. 2 to FIG. 8 , the present application provides a battery 10 , which includes a housing, at least one group of battery cells 11 , a pressure strip 12 , and an FPC 15 .

[0158] Each group of battery cells 11 includes a plurality of battery cells 11 arranged along a first direction. The plurality of groups of battery cells 11 are distributed along a second direction, and the first direction intersects the second direction.

[0159] The bead 12 has a channel for accommodating coolant, which is connected to the thermal management system 13 of the battery 10, allowing the coolant in the thermal management system 13 to flow into the channel. The bead 12 extends along a first direction and connects to the end caps 110 of a group of multiple battery cells 11. Multiple beadings 12 can be provided, distributed along a second direction. At least one of the multiple beadings 12 can be connected to the housing. The beading 12 can be made of metal or non-metallic materials, such as aluminum alloy or plastic.

[0160] The beading 12 includes a spray beading 121 and a cold pipe beading 122. An explosion-proof valve 111 is provided in the middle of the end cap 110 of the battery cell 11. The spray beading 121 is directly opposite the explosion-proof valve 111, and the width of the spray beading 121 is not less than the width of the explosion-proof valve 111. The spray beading 121 is bonded to the end caps 110 located on both sides of the explosion-proof valve 111. The side of the spray beading 121 facing the explosion-proof valve 111 is configured to melt through when the explosion-proof valve 111 is opened. The FPC 15 is provided on the side of the spray beading 121 facing away from the battery cell. The cold pipe beading 122 is connected to the end of the end cap 110 in the second direction, and the end of the end caps 110 of two adjacent groups of battery cells 11 that are close to each other is bonded to a cold pipe beading 122.

[0161] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0162] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, characterized in that, include: Box; At least one group of battery cells is installed in the box, each group of battery cells includes a plurality of battery cells arranged along a first direction; A pressure strip is provided with a channel for accommodating liquid, the pressure strip extends along the first direction and is connected to the plurality of battery cells.

2. The battery according to claim 1, wherein, Also includes: A thermal management system is installed on the box, the thermal management system is used for heat exchange with the battery monomer, and the thermal management system is connected to the channel.

3. The battery according to claim 2, wherein The end of the pressure strip in the first direction extends out of the battery cell, and a connector assembly is provided at the end of the pressure strip. The channel is connected to the thermal management system through the connector assembly.

4. The battery according to any one of claims 1-3, characterized in that include: A beam structure is provided on one side of a group of battery cells in a first direction; The connecting ear is arranged at a position corresponding to the pressure strip and the beam structure and extends along the lateral direction of the pressure strip. The pressure strip is connected to the beam structure through the connecting ear.

5. The battery according to any one of claims 1 to 4, characterized in that, The pressure strips are provided in plurality and distributed along a second direction, at least one of the pressure strips is connected to the box body, and the second direction intersects with the first direction.

6. The battery according to any one of claims 1-5, characterized in that, The wall thickness M1 of the pressure strip satisfies: 0.5 mm ≤ M1 ≤ 3.5 mm.

7. The battery according to any one of claims 1-6, characterized in that, The thickness M2 of the channel in the direction approaching and away from the battery cell satisfies: 1mm≤M2≤6mm.

8. The battery according to any one of claims 1-7, characterized in that, The layering strip comprises: A spraying pressure strip is provided corresponding to the explosion-proof valves of the plurality of battery cells, and a side of the spraying pressure strip close to the battery cell is configured to melt through when the explosion-proof valve is opened.

9. The battery according to claim 8, characterized in that, The width of the spray strip is greater than the width of the explosion-proof valve.

10. The battery according to claim 9, characterized in that, The battery cell comprises an end cover, the explosion-proof valve is mounted on the end cover, and the spray strip is bonded to the end cover.

11. The battery according to any one of claims 8-10, characterized in that, The spraying strip is made of plastic.

12. The battery according to any one of claims 8 - 11, characterized in that, The spray strip is made of metal, and a through hole facing the explosion-proof valve is provided on the side of the spray strip facing the explosion-proof valve. A sealing member for sealing the through hole is provided in the through hole, and the sealing member is configured to release the seal of the through hole when the explosion-proof valve is opened.

13. The battery according to any one of claims 8-12, characterized in that, Also includes: The FPC is arranged along the first direction, and the FPC is provided on a side of the spraying strip away from the battery cell.

14. The battery according to any one of claims 1-13, characterized in that, The layering strip comprises: A cold pipe bead is bonded to one end of the end covers of the plurality of battery cells in the second direction.

15. The battery according to claim 14, characterized in that, The battery comprises a plurality of battery cells arranged along the second direction, and one end of the end covers of two adjacent battery cells that are close to each other is bonded to one of the cold pipe strips.

16. The battery according to claim 14 or 15, characterized in that, The cold pipe pressing strip is made of metal or non-metal material.

17. The battery according to any one of claims 1-16, characterized in that, The layering strip comprises: A spraying pressure strip, wherein the spraying pressure strip is arranged corresponding to the explosion-proof valves of the plurality of battery cells; A cold pipe bead is bonded to one end of the end covers of the plurality of battery cells in the second direction.

18. An electrical device, characterized in that, include: The battery according to any one of claims 1 to 17, wherein the battery is used to power the electrical device.

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