Battery and electric device

Abstract

The embodiment of the utility model provides a battery, and belongs to the technical field of batteries. The battery comprises a box body; at least one group of battery cells, each group including a plurality of battery cells arranged in a first direction; and the pressing strip is internally provided with a channel for accommodating liquid, and the pressing strip extends along the first direction and is connected with the plurality of single batteries. The channels for accommodating the liquid are arranged in the pressing strips, so that the pressing strips can play a role in enhancing the anti-expansion strength, meanwhile, the cooling liquid can circulate in the channels of the pressing strips, a heat management role is played on the battery monomers, the pressing strips and a heat management assembly do not need to be arranged respectively, the internal space layout of the battery is optimized, and the space utilization rate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery and an electrical device. Background Art

[0002] In the related art, 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, and the pressure strip is connected to the battery cell to improve the main vibration frequency of the battery and the anti-expansion strength of the battery.

[0003] However, in order for the pressure strip to provide sufficient structural strength, the pressure strip needs to have a certain width, so that the pressure strip occupies a large space on the top of the battery cell, resulting in tight space for arranging other structures such as the tabs, affecting the assembly of other components. Utility Model Content

[0004] 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.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] Box;

[0007] 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;

[0008] 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.

[0009] In the above technical solution, by providing a channel for containing liquid in the pressure strip, the pressure strip can enhance the anti-expansion strength while allowing coolant to flow in the channel of the pressure strip, thereby playing a role in thermal management of the battery cell. There is no need to arrange the pressure strip and the thermal management component separately, thereby optimizing the spatial layout inside the battery and improving space utilization.

[0010] In some embodiments, the battery further comprises:

[0011] 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.

[0012] In the above technical solution, the thermal management system is connected to the channel so that the coolant in the thermal management system can flow into the channel, so that the coolant in the channel can circulate, thereby improving the heat exchange effect and providing pressure to the coolant in the channel.

[0013] In some embodiments, an end of the pressure strip in the first direction extends out of the battery cell, a connector assembly is provided at the end of the pressure strip, and the channel is connected to the thermal management system through the connector assembly.

[0014] In the above technical solution, a joint assembly is provided to facilitate the connection of the channel in the pressure strip with the thermal management system, thereby achieving the communication of the coolant.

[0015] In some embodiments, the battery comprises:

[0016] A beam structure, provided on one side of a group of battery cells in a first direction;

[0017] 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.

[0018] 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 effect on its own structure and sealing when connected to the beam structure, and the structural strength is high.

[0019] 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.

[0020] 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.

[0021] In some embodiments, the wall thickness M1 of the layering strip satisfies:

[0022] 0.5mm≤M1≤3.5mm.

[0023] 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.

[0024] In some embodiments, the thickness M2 of the channel in the direction close to and away from the battery cell satisfies:

[0025] 1mm≤M2≤6mm.

[0026] In the above technical solution, the thickness of the channel is limited so that the flow pressure drop of the coolant in the channel is controlled within a certain range, 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.

[0027] In some embodiments, the layer comprises:

[0028] 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.

[0029] In the above technical solution, by setting up a spray strip, the spray strip can not only strengthen the structural strength, but also melt through and spray out the coolant in its channel to control the thermal runaway in the event of thermal runaway of the battery cell, thereby improving the safety performance of the battery.

[0030] In some embodiments, the width of the spray strip is greater than the width of the explosion-proof valve.

[0031] In the above technical solution, the width of the spray strip is set to be larger than the width of the explosion-proof valve so that the spray strip can cover the explosion-proof valve, thereby improving the effect of spray cooling.

[0032] 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.

[0033] In the above technical solution, the spray strip is bonded to the end cover so that the connection position of the spray strip is kept away from the explosion-proof valve as far as possible, so as to prevent the external structure of the explosion-proof valve from being affected by the strong bonding force.

[0034] In some embodiments, the spray strip is made of plastic.

[0035] In the above technical solution, the spray strip is made of plastic material, which saves costs and can melt through relatively quickly in the event of thermal runaway of the battery cell.

[0036] In some embodiments, 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, and 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.

[0037] In the above technical solution, the spray strip is made of metal to improve its structural strength, and through holes and seals are provided so that 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.

[0038] In some embodiments, the battery further comprises:

[0039] 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.

[0040] In the above technical solution, the FPC is arranged on the spray strip to optimize the space layout and improve the space utilization.

[0041] In some embodiments, the layer comprises:

[0042] A cold pipe bead is bonded to one end of the end covers of the plurality of battery cells in the second direction.

[0043] In the above technical solution, by providing the cold pipe pressure strip, the overall structural strength is improved and the thermal management of the battery cells can be performed.

[0044] In some embodiments, the battery includes a plurality of groups of battery cells arranged along the second direction, and ends of the end covers of two adjacent groups of battery cells that are close to each other are bonded to one of the cold pipe strips.

[0045] In the above technical solution, a cold 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, optimizing the spatial layout and improving the space utilization.

[0046] In some embodiments, the cold pipe bead is made of metal or non-metal material.

[0047] In some embodiments, the layer comprises:

[0048] A spraying pressure strip, wherein the spraying pressure strip is arranged corresponding to the explosion-proof valves of the plurality of battery cells;

[0049] A cold pipe bead is bonded to two ends of the end covers of the plurality of battery cells in the second direction.

[0050] 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.

[0051] In a second aspect, an embodiment of the present application provides an electrical device, including:

[0052] The battery as described in any embodiment of the first aspect is used to supply power to the electrical device.

[0053] In the above technical solution, by using a battery as in any one of the embodiments in the first aspect, the use stability and safety of the electrical device are assisted in improving. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0056] Figure 2 One of the partial structural schematic diagrams of a battery provided in some embodiments of the present application;

[0057] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0058] Figure 4 The second schematic diagram of the partial structure of a battery provided in some embodiments of the present application;

[0059] Figure 5 The third schematic diagram of the partial structure of a battery provided in some embodiments of the present application;

[0060] Figure 6 A fourth schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0061] Figure 7 for Figure 6 The enlarged view of point B in the middle;

[0062] Figure 8 A schematic diagram of a partial cross-sectional structure of a battery provided in some embodiments of the present application;

[0063] Fig. 9 A schematic diagram of the cross-sectional structure of a layering strip provided in some embodiments of the present application.

[0064] Reference numerals:

[0065] Vehicle 1, battery 10, motor 20, controller 30;

[0066] Battery cell 11, end cover 110, explosion-proof valve 111;

[0067] Bead 12, spray bead 121, cold pipe bead 122, joint assembly 123, connection assembly 124, connection ear 1241, sleeve 125, support structure 126;

[0068] Thermal management system 13, beam structure 14, FPC 15. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0070] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0071] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0072] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0074] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0075] The battery cells mentioned in the embodiments of the present 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., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, rectangular or other shapes, etc., which are not limited in the embodiments of the present application. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

[0076] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0077] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed 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 a positive electrode ear. 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 includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0078] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0079] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety and cycle life.

[0080] In general batteries, 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 battery vibration frequency and the anti-expansion strength of the battery. However, in order for the pressure strip to provide sufficient structural strength, the pressure strip needs to have a certain width, so that the pressure strip occupies a large space on the top of the battery cell, resulting in tight space for the arrangement of other structures such as the bar and sampling assembly. When there is a need to configure other components, such as the spray assembly, there is easily no assembly space, which affects the assembly of other components.

[0081] 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 pressure strip, 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 pressure strip, each group includes a plurality of battery cells arranged along a first direction, a channel for accommodating liquid is provided in the pressure strip, and the pressure strip extends along the first direction and is connected to the plurality of battery cells.

[0082] In a battery of this structure, a channel for containing liquid is provided in the pressure strip, so that the pressure strip can enhance the anti-expansion strength while allowing coolant to flow in the channel of the pressure strip, thereby performing thermal management for the battery cells. There is no need to arrange the pressure strip and the thermal management components separately, thus optimizing the internal space layout of the battery and improving space utilization.

[0083] The battery disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery thermal management system disclosed in the present application and batteries etc. can be used to form the electrical device, which is conducive to improving the scope of application of the battery thermal management system and reducing the difficulty of assembling the battery thermal management system.

[0084] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0085] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device in an embodiment of the present application.

[0086] like Figure 1 As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 20, a controller 30 and a battery 10 may be arranged 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 may be arranged at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may 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 during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used 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.

[0087] In order to meet different power usage 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 connection and parallel connection.

[0088] like Figure 2 The figure shows an exploded view of the structure of a battery 10 according to an embodiment of the present application. The battery 10 includes a box and a plurality of battery cells 11, and the battery cells 11 are used to be accommodated in the box. The box is used to provide an assembly space for the battery cells 11, and the box can adopt a variety of structures.

[0089] In some embodiments, the box body may include a first box body and a second box body, the first box body and the second box body cover each other, and the first box body and the second box body jointly define an assembly space for accommodating the battery cell 11. The second box body may be a hollow structure with one end open, the first box body may be a plate-like structure, and the first box body covers the open side of the second box body, so that the first box body and the second box body jointly define an assembly space; the first box body and the second box body may also be hollow structures with one side open, and the open side of the first box body covers the open side of the second box body. Of course, the box body formed by the first box body and the second box body may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0090] In the battery 10, multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 11 are connected in series and in parallel. Multiple battery cells 11 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 11 is accommodated in a box; of course, the battery 10 can also be a battery module formed by multiple battery cells 11 connected in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in a box. The battery 10 can also include other structures. For example, the battery 10 can also include a converging component for realizing electrical connection between multiple battery cells 11.

[0091] Each battery cell 11 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 11 may be cylindrical, flat, rectangular or in other shapes. Figure 1 In the figure, the battery cell 11 is in the shape of a rectangular parallelepiped.

[0092] According to some embodiments of the present application, Figure 2-Figure 8 As shown, the present application provides a battery 10 , which includes a box body, at least one group of battery cells 11 and a pressure bar 12 .

[0093] 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 capacity of the battery 10 is increased by arranging multiple battery cells 11.

[0094] A channel for containing liquid is provided in the pressure strip 12 . The pressure strip 12 extends along a first direction and is connected to the plurality of battery cells 11 .

[0095] 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.

[0096] 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 the production cost. 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 can be understood that the shape of the channel is not specifically limited here.

[0097] In this embodiment, in order to reduce the space occupied by the pressure strip 12, the pressure strip 12 can be set in a flat shape, so that the pressure strip 12 is easier to fit with the surface of the battery cell 11, and can also increase the connection area and heat exchange area, improve the connection strength and heat exchange efficiency. Among them, the pressure strip 12 and the battery cell 11 can be bonded by a thermally conductive adhesive with good thermal conductivity to improve the thermal conductivity efficiency.

[0098] According to the embodiment of the present application, a channel for containing liquid is provided in the pressure strip 12, so that the pressure strip 12 can enhance the anti-expansion strength while allowing cooling liquid to flow in the channel of the pressure strip 12, thereby performing thermal management on the battery cell 11. There is no need to separately arrange the pressure strip 12 and the thermal management component, thereby optimizing the internal space layout of the battery 10 and improving space utilization.

[0099] According to some embodiments of the present application, Figure 4 and Figure 5 As shown, 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 . The thermal management system 13 may be connected to the channel.

[0100] The thermal management system 13 may include a heat exchange component installed in the box, and a coolant flows in the heat exchange component. The heat exchange component exchanges heat with the battery cell 11 to improve the working stability of the battery cell 11. The heat exchange component may be connected to the channel of the pressure strip 12 so that the coolant circulating in the heat exchange component can flow into the channel, so that the pressure strip 12 can assist the thermal management system 13 in thermal management of the battery cell 11, and the coolant of the thermal management system 13 can provide pressure to the coolant in the channel, drive the coolant in the channel to circulate, and improve the heat exchange effect.

[0101] According to the 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.

[0102] According to some embodiments of the present application, Figure 4 and Figure 5 As shown, the end of the pressure strip 12 in the first direction may extend out of the battery cell 11 , and a connector assembly 123 may be provided at the end of the pressure strip 12 . The channel may be connected to the thermal management system 13 through the connector assembly 123 .

[0103] 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. Exemplarily, the connector assembly 123 can be a quick-connect connector, etc., which is easy to install and connect, and automatically breaks the circuit when the connector assembly 123 is disconnected, and the coolant is not easy to leak.

[0104] By providing the joint assembly 123 , the channel in the pressure strip 12 is connected to the thermal management system 13 , thereby achieving the communication of the coolant.

[0105] According to some embodiments of the present application, Figure 4 and Figure 5 As shown, 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 via the connecting ear 1241.

[0106] In this embodiment, the beam structure 14 can be a supporting beam arranged in the box body or a frame beam constituting the frame structure of the box body. 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, the expansion of the battery cells 11 can be suppressed.

[0107] The end of the pressure strip 12 in the first direction can extend out of the battery cell 11 and extend to the expansion beam. The connection ear 1241 is provided on the pressure strip 12 and is located at a position corresponding to the pressure strip 12 and the beam structure 14. The connection ear 1241 is connected to the pressure strip 12 and extends along the side of the pressure strip 12. The pressure strip 12 is fixedly connected to the expansion beam by fixing the connection ear 1241 to the expansion beam. The connection ear 1241 can be connected by bolt connection, bonding or snap connection, etc., which is not limited here.

[0108] In one example, the connecting ear 1241 can be integrally provided with the pressure strip 12 .

[0109] In another example, if Figure 4 and Figure 5 As shown, the battery 10 may include a connecting component 124, and the connecting component 124 may be arranged in a "J" 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 pressure strip 12 and the beam structure 14. The socket 125 is sleeved outside the pressure strip 12, which can enhance the bearing capacity of the pressure strip 12 at the corresponding position, and the connecting component 124 is arranged on the side of the socket 125 away from the beam structure 14 to apply a clamping force toward the beam structure 14 to the socket 125, thereby fixing the pressure strip 12 and the beam structure 14. By setting the socket 125 and the connecting component 124, while fixing the pressure strip 12 and the beam structure 14, the force directly acting on the pressure strip 12 is small, the pressure strip 12 is not easy to collapse, and the structural strength of the pressure strip 12 is little affected, and there is no need to open a connecting hole on the pressure strip 12, which has little effect on its sealing.

[0110] According to the embodiment of the present application, the structural strength of the pressure strip 12 is improved by connecting the pressure strip 12 to the beam structure 14. By providing the connecting ear 1241, when the pressure strip 12 is connected to the beam structure 14, the pressure strip 12 has little impact on its own structure and sealing, and the structural strength is high.

[0111] In some embodiments, Figure 4 and Figure 5 As shown, the end of the pressure strip 12 in the first direction extends out of the expansion beam, and the joint assembly 123 is arranged on the portion of the pressure strip 12 extending out of the expansion beam. The portion of the pressure strip 12 extending out of the expansion beam is also provided with a support structure 126. The support structure 126 is connected to one side of the pressure strip 12 and is fixedly connected to the side wall of the expansion beam away from the battery cell 11 to provide support force for the pressure strip 12. When the pressure strip 12 is connected to the pipeline of the thermal management system 13 through the joint assembly 123, the tension or pressure applied to the pressure strip 12 is not easy to deform the pressure strip 12, thereby ensuring the smoothness of the channel in the pressure strip 12 as well as the overall structural strength and stability in use.

[0112] According to some embodiments of the present application, Figure 2 , Figure 3 and Figure 6 As shown, a plurality of pressure strips 12 may be provided and 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.

[0113] 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, and the second direction 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.

[0114] 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, and the anti-expansion strength of the battery 10 is further improved.

[0115] It should be noted that the number of pressure strips 12 is not limited here, and 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.

[0116] 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.

[0117] According to some embodiments of the present application, Fig. 9 As shown, the wall thickness M1 of the pressure strip 12 can satisfy:

[0118] 0.5mm≤M1≤3.5mm.

[0119] It is understandable that the thicker the wall thickness of the molding 12, the higher the strength. However, considering the thermal management performance of the molding 12, the thickness of the molding 12 should not be too large. By limiting the wall thickness of the molding 12, the molding 12 has sufficient structural strength while ensuring the heat exchange effect of the coolant in the channel, and the space occupied by the molding 12 in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0120] The wall thickness M1 of the layer 12 has a value range of [0.5 mm-3.5 mm]. Specifically, the wall thickness M1 of the layer 12 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm or other values ​​between 0.5 mm and 3.5 mm.

[0121] According to some embodiments of the present application, Fig. 9 As shown, the thickness M2 of the channel in the direction close to and away from the battery cell 11 can satisfy:

[0122] 1mm≤M2≤6mm.

[0123] 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.

[0124] 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.

[0125] According to the embodiment of the present application, the wall thickness of the pressure strip 12 is limited so that the pressure strip 12 has sufficient structural strength and the space occupied by the pressure strip 12 in the thickness direction is controlled within a certain range, thereby improving space utilization.

[0126] According to some embodiments of the present application, Figure 6-Figure 8 As shown, the pressure strip 12 may include a spray pressure strip 121 , which may be arranged corresponding to the explosion-proof valves 111 of the plurality of battery cells 11 , and a 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.

[0127] In this embodiment, the spray strip 121 can be arranged corresponding to the explosion-proof valve 111 of a group of multiple battery cells 11, so that the spray strip 121 can play a role in spraying coolant on the battery cell 11 to reduce the temperature when the battery cell 11 has thermal runaway.

[0128] 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. When the battery cell 11 has thermal runaway, 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.

[0129] According to the embodiment of the present application, a spray strip 121 is provided. While strengthening the structural strength, when a battery cell 11 experiences thermal runaway, the spray strip 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.

[0130] According to some embodiments of the present application, Figure 8 As shown, 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 effect of spray cooling.

[0131] According to some embodiments of the present application, Figure 8 As shown, 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 spraying strip 121 may be bonded to the end cover 110 .

[0132] In this embodiment, the end cap 110 may be an end cap 110 on the side of the battery cell 11 provided with a pole, and the explosion-proof valve 111 may be installed on the end cap 110. By bonding the spraying strip 121 to the end cap 110, so that the spraying strip 121 and the explosion-proof valve 111 are directly opposite, the spraying strip 121 may be melted through when the explosion-proof valve 111 is opened.

[0133] Among them, because the end face strength of the explosion-proof valve 111 is relatively weak, although the spray strip 121 is directly opposite to the explosion-proof valve 111, when the spray strip 121 is assembled, the adhesive is applied to the end cover 110 around the explosion-proof valve 111 to make the spray strip 121 actually bonded to the end cover 110, so that the force generated when the spray strip 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.

[0134] 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.

[0135] According to some embodiments of the present application, the spray bead 121 may be made of plastic material. By setting the spray bead 121 to be made of plastic material, costs can be saved and the spray bead 121 can be melted through relatively quickly in the case of thermal runaway of the battery cell 11. The material of the spray bead 121 includes but is not limited to PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), PS (polystyrene), and the like.

[0136] According to some embodiments of the present application, the spray strip 121 may be made of metal, and a through hole directly opposite to the explosion-proof valve 111 may be provided on the side of the spray strip 121 facing the explosion-proof valve 111. A seal for sealing the through hole may be provided in the through hole, and the seal may be configured to release the seal of the through hole when the explosion-proof valve 111 is opened.

[0137] In this embodiment, the spray bead 121 is made of metal to improve the structural strength of the spray bead 121 and the anti-expansion strength of the battery 10. The through hole can be connected to the channel in the spray bead 121. By setting a through hole on the spray bead 121 and setting a seal in the through hole, the channel is closed when the seal seals the through hole, and the coolant flows normally. In the case of thermal runaway of the battery cell 11 and the explosion-proof valve 111 is opened, the seal can release the seal of the through hole to open the through hole, and the coolant in the channel is sprayed to the explosion-proof valve 111 through the through hole.

[0138] In one example, the seal can be made of plastic so that the high-temperature smoke can quickly melt the seal and 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 smoke.

[0139] 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. Through holes and seals are provided so that 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.

[0140] According to some embodiments of the present application, Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, 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 strip 121 away from the battery cell 11. The FPC 15 may be bonded to the spray strip 121 or connected by a snap, which is not specifically limited here. By arranging the FPC 15 on the spray strip 121, the spatial layout is optimized and the space utilization is improved.

[0141] According to some embodiments of the present application, Figure 6 and Figure 7 As shown, the bead 12 may include a cold pipe bead 122 , and 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.

[0142] In this embodiment, the bead 12 may include a cold pipe bead 122, and 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, and play a role in assisting thermal management of the battery cell 11. The cold pipe bead 122 is bonded to the shoulder of the battery cell 11, and the shoulder of the battery cell 11 is also the two ends of the end cover 110 of the battery cell 11 in the second direction. By bonding the cold pipe bead 122 to a 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 pole and the bar on the end cover 110.

[0143] According to the embodiment of the present application, by providing the cold pipe bead 122 , the overall structural strength is improved and a thermal management function for the battery cell 11 can be performed.

[0144] According to some embodiments of the present application, Figure 6 As shown, the battery 10 may include a plurality of battery cells 11 arranged along the second direction, and the ends of the end caps 110 of two adjacent battery cells 11 that are close to each other are bonded to a cold pipe strip 122 .

[0145] To increase the capacity of the battery 10 and optimize the layout of the battery cells 11 , the battery 10 may include a plurality of 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.

[0146] The ends of the end caps 110 of two adjacent groups of battery cells 11 that are close to each other are bonded to the same cold pipe bead 122 to reduce the number of cold pipe bead 122 when multiple groups of battery cells 11 are provided and optimize the spatial layout.

[0147] According to the embodiment of the present application, a cold pipe pressure strip 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 and optimizing the spatial layout to improve the space utilization.

[0148] According to some embodiments of the present application, the cold pipe bead 122 may be made of metal or non-metal. In this embodiment, the cold pipe bead 122 mainly serves to improve 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.

[0149] According to some embodiments of the present application, Figure 6 and Figure 7As shown, the pressure strip 12 may include a spray pressure strip 121 and a cold pipe pressure strip 122. The spray pressure strip 121 may be arranged corresponding to the explosion-proof valve 111 of a group of multiple battery cells 11; the cold pipe pressure strip 122 may be bonded to one end of the end cap 110 of the multiple battery cells 11 in the second direction.

[0150] 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, the spray strip 121 is connected to the middle of the end cover 110 in the second direction, and the cold pipe strip 122 is connected to one end of the end cover 110 in the second direction. By arranging the spray strip 121 and the cold pipe strip 122, the overall structural strength is improved while the thermal management effect and the safety performance of the battery 10 are improved.

[0151] 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.

[0152] 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 use stability and safety of the electric device are assisted to be improved.

[0153] The power-consuming device may be any of the aforementioned devices or systems using the battery 1010 .

[0154] According to some embodiments of the present application, see Figure 2-Figure 8 As shown, the present application provides a battery 10 , which includes a box body, at least one group of battery cells 11 , a pressure bar 12 and an FPC 15 .

[0155] Each group of battery cells 11 includes a plurality of battery cells 11 arranged along a first direction, and the plurality of groups of battery cells 11 are distributed along a second direction, and the first direction intersects the second direction.

[0156] The bead 12 is provided with a channel for accommodating coolant, and the channel is connected to the thermal management system 13 of the battery 10 so that the coolant in the thermal management system 13 can flow into the channel. The bead 12 extends along the first direction and is connected to the end caps 110 of a group of multiple battery cells 11. There can be multiple beadings 12, and the multiple beadings 12 are distributed along the second direction. At least one of the multiple beadings 12 can be connected to the box body. The beading 12 can be made of metal or non-metal material, such as aluminum alloy or plastic.

[0157] The bead 12 includes a spray bead 121 and a cold pipe bead 122. An explosion-proof valve 111 is provided in the middle of the end cap 110 of the battery cell 11. The spray bead 121 is directly opposite to the explosion-proof valve 111, and the width of the spray bead 121 is not less than the width of the explosion-proof valve 111. The spray bead 121 is bonded to the end caps 110 located on both sides of the explosion-proof valve 111, wherein the side of the spray bead 121 facing the explosion-proof valve 111 is configured to melt through when the explosion-proof valve 111 is opened, and the FPC 15 is provided on the side of the spray bead 121 away from the battery cell. The cold pipe bead 122 is connected to the end of the end cap 110 in the second direction, and the ends of the end caps 110 of two adjacent groups of battery cells 11 that are close to each other are bonded to a cold pipe bead 122.

[0158] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0159] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope 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, characterized in that 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, characterized in that 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 claim 1, characterized in that include: A beam structure, 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 claim 1, 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 claim 1, characterized in that The wall thickness M1 of the layering strip satisfies: 0.5mm≤M1≤3.5mm.

7. The battery according to claim 1, characterized in that The thickness M2 of the channel in the direction close to and away from the battery cell satisfies: 1mm≤M2≤6mm.

8. The battery according to any one of claims 1 to 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 claim 8, characterized in that The spraying strip is made of plastic.

12. The battery according to claim 8, 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 claim 8, 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 to 7, 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, 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 to 7, 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.

Images