Battery, electric device, method and apparatus for manufacturing battery

Abstract

The application provides a battery, an electrical equipment, a battery preparation method and equipment. The battery comprises a battery cell group, a cooling system, a signal transmission assembly and a shielding piece. The battery cell group comprises a plurality of battery cells. The cooling system is arranged on a first surface of the battery cell group. The signal transmission assembly is arranged on a second surface of the battery cell group, and the second surface is adjacent to the first surface. The signal transmission assembly comprises a busbar component and an insulating layer. The insulating layer encapsulates the busbar component. The insulating layer has an opening. The busbar component is used for electrically connecting with the battery cells in the battery cell group at the opening. The shielding piece is connected to the battery cell group and protrudes from the edge of the first surface, and is used for blocking the condensed liquid generated by the cooling system from reaching the signal transmission assembly. The battery, the electrical equipment, the battery preparation method and the equipment can enhance the safety of the battery.

Description

Technical Field

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

[0002] With increasing environmental pollution, the new energy industry is attracting more and more attention. Within the new energy industry, battery technology is a crucial factor in its development.

[0003] Safety is a crucial issue in the development of battery technology. If battery safety cannot be guaranteed, then the battery cannot be used.

[0004] In high-temperature and high-humidity environments, condensation can easily form inside the battery casing, posing a safety hazard and affecting battery safety. Therefore, enhancing battery safety is a pressing technical problem that needs to be solved in battery technology. Summary of the Invention

[0005] This application provides a battery, an electrical device, a method for manufacturing a battery, and an apparatus that can enhance battery safety.

[0006] In a first aspect, a battery is provided, comprising: a battery cell pack including a plurality of battery cells; a cooling system disposed on a first surface of the battery cell pack; a signal transmission component disposed on a second surface of the battery cell pack, the second surface being adjacent to the first surface, the signal transmission component including a busbar and an insulating layer, the insulating layer encapsulating the busbar, the insulating layer having an opening, the busbar being used for electrically connecting to a battery cell in the battery cell pack at the opening; and a shielding member connected to the battery cell pack and protruding from the edge of the first surface, the shielding member being used to prevent condensate generated by the cooling system from reaching the signal transmission component.

[0007] The battery in this embodiment has a cooling system on its first surface and a signal transmission component on its second surface adjacent to the first surface for electrical connection between multiple battery cells. The battery also includes a shielding member that is connected to and protrudes from the edge of the first surface to prevent condensate generated by the cooling system from reaching the signal transmission component, thereby preventing short circuits and improving the safety of the battery.

[0008] In one possible implementation, the orthographic projection of the shielding member on a plane parallel to the first surface covers the orthographic projection of the transmission component on the same plane. The shielding member extends beyond the area where the signal transmission component is located, acting as a "roof" to guide condensate away from the signal transmission component in the event of condensation from the cooling system, such as the space between two opposing battery cells, thus protecting the signal transmission component.

[0009] In one possible implementation, the protruding portion of the shielding member extending beyond the edge of the first surface is parallel to the first surface. In this way, condensate generated by the cooling system is collected in the area between the shielding members of the cooling system located between the two opposing battery cell groups, i.e., the area of ​​the cooling system not in contact with the shielding members, thereby preventing condensate formation directly above the signal transmission components and enhancing battery safety.

[0010] In one possible implementation, the protruding portion of the shielding member extending beyond the edge of the first surface is bent toward the second surface. Bending the shielding member allows for drainage of condensate, making it easier to collect condensate in the space between the two battery cell groups and limiting its reach to the battery cell groups.

[0011] In one possible implementation, the battery comprises a plurality of battery cell groups; wherein the protruding portions of the shields of two opposing battery cell groups connect to form a groove for collecting condensate. Condensate generated by the cooling system can be collected by the groove as it drips from the shield. The condensate collected in the groove can be discharged at an appropriate time, such as when the vehicle is going uphill or downhill, the condensate in the groove is naturally discharged to the front and rear ends of the battery cell groups.

[0012] In one possible implementation, a drain hole is provided at the bottom of the groove for draining the condensate. This allows the condensate collected in the groove to be drained more promptly between the two opposing battery cell groups, preventing condensate buildup within the groove.

[0013] In one possible implementation, the protruding portions of the shielding members of two opposing battery cell groups are connected by a connecting strip to form the groove.

[0014] In one possible implementation, the shielding members of the two opposing battery cell groups are integrally formed to create the groove, thereby improving the reliability of the shielding members.

[0015] In one possible implementation, the shielding element is made of an insulating material, thereby ensuring the insulation and isolation of the signal transmission components and further improving battery safety.

[0016] In one possible implementation, the battery housing is provided with a liquid storage tank corresponding to the shielding member. The shielding member is used to guide the condensate into the liquid storage tank, thereby keeping the condensate away from the battery's signal transmission components and enhancing battery safety.

[0017] In one possible implementation, the end of the groove is connected to the wall of the battery housing, and the groove communicates with a cavity within the wall of the housing to guide the condensate into the cavity, thereby keeping the condensate away from the battery's signal transmission components and enhancing battery safety.

[0018] In one possible implementation, the shielding member is fixed between the first surface and the cooling system. Because the shielding member is in direct contact with the cooling system, the contact area is large, thus enabling better drainage of the condensate.

[0019] In one possible implementation, the shield is fixed to the second surface, and the end of the shield near the cooling system is bent to protrude beyond the edge of the first surface. The shield can be fixed to the area on the second surface of the battery cell pack above the signal transmission component, thus providing better protection for the signal transmission component because the distance between it and the signal transmission component can be set close enough.

[0020] In one possible implementation, the battery cell group comprises N battery cell columns arranged along a first direction, with the cells in each of the N columns arranged along a second direction, the first direction being perpendicular to the second direction, and N being a positive integer. The first surface is perpendicular to the first direction, and the second surface is parallel to a plane defined by the first and second directions. When the first surface is the surface with the largest area in the battery cell group, the heat dissipation speed of the battery cell group is increased, achieving a better temperature regulation effect.

[0021] In a second aspect, an electrical device is provided, comprising: a battery of the first aspect, said battery being used to provide electrical energy.

[0022] Thirdly, a method for manufacturing a battery is provided, comprising: providing a battery cell assembly including a plurality of battery cells; providing a cooling system disposed on a first surface of the battery cell assembly; providing a signal transmission component disposed on a second surface of the battery cell assembly, the second surface being adjacent to the first surface, the signal transmission component including a busbar and an insulating layer, the insulating layer encapsulating the busbar, the insulating layer having an opening, the busbar being used for electrically connecting to a battery cell in the battery cell assembly at the opening; and providing a shielding member connected to the battery cell assembly and protruding from the edge of the first surface, the shielding member being used to prevent condensate generated by the cooling system from reaching the signal transmission component.

[0023] Fourthly, an apparatus for manufacturing batteries is provided, comprising a module for performing the method described in the third aspect.

[0024] The technical solution of this application embodiment provides a cooling system on a first surface of the battery and a signal transmission component on a second surface adjacent to the first surface to enable electrical connection between multiple battery cells. The battery also includes a shielding member that is connected to and protrudes from the edge of the first surface to prevent condensate generated by the cooling system from reaching the signal transmission component, thereby avoiding short circuits in the battery and improving the safety of the battery. Attached Figure Description

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

[0026] Figure 1 This is a schematic diagram of the structure of a vehicle according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a battery according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of a battery according to an embodiment of this application;

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

[0031] Figure 6 This is a schematic exploded view of some internal components of a battery according to an embodiment of this application;

[0032] Figure 7 yes Figure 6 A three-dimensional structural diagram of some components inside the battery is shown.

[0033] Figure 8 This is a schematic diagram of the arrangement of battery cells in a battery cell pack according to an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of the structure of a battery internal component according to an embodiment of this application;

[0035] Figure 10 yes Figure 9 A three-dimensional structural diagram of some components inside the battery is shown.

[0036] Figure 11 This is a schematic diagram of the structure of a battery internal component according to an embodiment of this application;

[0037] Figure 12 yes Figure 11 A three-dimensional structural diagram of some components inside the battery is shown.

[0038] Figure 13 yes Figure 11 A three-dimensional structural diagram of some components inside the battery is shown.

[0039] Figure 14 This is a schematic diagram of the internal groove of a battery according to an embodiment of this application;

[0040] Figure 15 This is a schematic diagram of the internal cavity structure of a battery according to an embodiment of this application;

[0041] Figure 16 This is a schematic flowchart of a method for preparing a battery according to an embodiment of this application;

[0042] Figure 17 This is a schematic block diagram of an apparatus for preparing a battery according to an embodiment of this application;

[0043] The accompanying drawings are not drawn to scale. Detailed Implementation

[0044] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise stated, all technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion; "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

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

[0047] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0049] In this application, the battery cell 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 are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, cuboid / square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0050] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. A battery generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0051] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes 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, and the uncoated current collector protrudes beyond the coated current collector, serving as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of polypropylene (PP) or polyethylene (PE), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0052] To meet diverse power demands, a battery can comprise multiple individual battery cells, which can be connected in series, parallel, or a combination of both. Optionally, multiple battery cells can first be connected in series, parallel, or a combination to form a battery module, and then these battery modules can be connected in series, parallel, or a combination to form a battery. In other words, multiple battery cells can directly form a battery, or they can first be assembled into battery modules, and then the battery modules can be assembled into a battery. The battery is then further installed in electrical equipment to provide power to that equipment.

[0053] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, battery safety also needs to be considered.

[0054] For individual battery cells, the main safety hazards come from the charging and discharging processes, as well as appropriate temperature design. To control the temperature of individual battery cells, a cooling system can be installed inside the battery. The cooling system contains a cooling medium to lower the temperature of the battery cells. The cooling system can also be called a cooling component or cooling plate, and the cooling medium can be called a cooling fluid, more specifically, a coolant or cooling gas. The cooling fluid circulates to achieve better temperature regulation. Optionally, the cooling medium can be water, a mixture of water and ethylene glycol, or air. When the cooling medium is water, the cooling system can also be called a water-cooled plate.

[0055] In addition to the battery cells and cooling system mentioned above, the battery casing may also include signal transmission components and other battery parts. In some embodiments, the casing may also include structures for securing the battery cells. The shape of the casing can be determined based on the number of battery cells it houses. In some embodiments, the casing may be square and have six walls.

[0056] It should be understood that the signal transmission component of this application embodiment can be used to transmit signals such as voltage and / or temperature of individual battery cells. The signal transmission component may include a busbar for establishing an electrical connection between multiple battery cells, such as in parallel, series, or mixed connections. The busbar can establish the electrical connection between battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbar can be fixed to the electrode terminals of the battery cells by welding. The busbar transmits the voltage of the battery cells; when multiple battery cells are connected in series, a higher voltage is obtained. Accordingly, the electrical connection formed by the busbar can also be referred to as a "high-voltage connection."

[0057] In addition to the busbar component, the signal transmission assembly may also include sensors for sensing the state of individual battery cells. For example, the sensors may be used to measure and transmit sensing signals such as the temperature and state of charge of the individual battery cells. In embodiments of this application, the electrical connection components within the battery may include the busbar component and / or sensors.

[0058] The busbar and sensor can be encapsulated in an insulating layer to form a signal transmission assembly. Accordingly, the signal transmission assembly can be used to transmit the voltage and / or sensing signals of the battery cells. The signal transmission assembly does not have an insulating layer at the connection point with the electrode terminals of the battery cells; that is, the insulating layer has openings at this point for connection with the electrode terminals of the battery cells.

[0059] Considering that batteries are prone to condensation in high-temperature and high-humidity environments, this can pose a safety hazard to the signal transmission components inside the battery, potentially causing electrical connection failures and malfunctions, thus affecting battery safety. Specifically, when the high-temperature and high-humidity gases inside the battery encounter the cooling system within the battery casing, condensation will form. If this condensation drips onto the electrical connection areas inside the battery, it may affect battery safety.

[0060] In view of this, this application provides a technical solution in which a shield is provided on the edge of the side of the battery where the cooling system is located to prevent the condensate generated by the cooling system from reaching the electrical connection area with the battery, thereby enhancing the safety of the battery.

[0061] In addition to the components mentioned above, a pressure balancing mechanism can also be installed on the battery casing to balance the pressure inside and outside the casing. For example, when the pressure inside the casing is higher than that outside, the gas inside the casing can flow to the outside through the pressure balancing mechanism; when the pressure inside the casing is lower than that outside, the gas outside the casing can flow into the inside through the pressure balancing mechanism.

[0062] It should be understood that the various components in the battery casing described above should not be construed as limiting the embodiments of this application. That is, the battery casing of the embodiments of this application may or may not include the above-described components.

[0063] The technical solutions described in the embodiments of this application are applicable to various battery-powered devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, electric vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0064] It should be understood that the technical solutions described in the embodiments of this application are not limited to the devices described above, but can also be applied to all devices that use batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0065] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 50, and a battery 10 can be installed inside vehicle 1. The controller 50 controls the battery 10 to supply power to the motor 40. For example, the battery 10 can be installed at the bottom, front, or rear of vehicle 1. The battery 10 can be used to power vehicle 1; for example, it can serve as the operating power source for the vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0066] To meet different power demands, battery 10 may include multiple individual battery cells. For example, Figure 2 The diagram shown is a structural schematic of a battery 10 according to an embodiment of this application. The battery 10 may include at least one battery module 200. The battery module 200 includes multiple battery cells 20. The battery 10 may also include a housing 11, which has a hollow interior structure, and the multiple battery cells 20 are housed within the housing 11. Figure 2 As shown, the housing 11 may include two parts, referred to here as the first part 111 (upper housing) and the second part 112 (lower housing), which are fastened together. The shapes of the first part 111 and the second part 112 may be determined according to the shape of the combination of multiple battery cells 20, and at least one of the first part 111 and the second part 112 may have an opening. For example, as Figure 2 As shown, both the first part 111 and the second part 112 can be hollow cuboids, each with only one open face. The openings of the first part 111 and the second part 112 are opposite to each other, and the first part 111 and the second part 112 interlock to form a box 11 with a closed cavity. For example, unlike... Figure 2 As shown, in the first part 111 and the second part 112, only one can be a hollow cuboid with an opening, while the other can be plate-shaped to cover the opening. For example, if the second part 112 is a hollow cuboid with only one open face, and the first part 111 is plate-shaped, then the first part 111 covers the opening of the second part 112 to form a box with a closed cavity, which can be used to accommodate multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed and placed inside the box 11 formed by the first part 111 and the second part 112.

[0067] Optionally, the battery 10 may also include other structures, which will not be described in detail here. For example, the battery 10 may also include a busbar component for realizing the electrical connection between multiple battery cells 20, such as parallel, series, or mixed connection. Specifically, the busbar component can realize the electrical connection between battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the housing by a conductive mechanism. Optionally, the conductive mechanism may also be part of the busbar component.

[0068] The number of battery cells 20 can be set to any value depending on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or a combination thereof to achieve a larger capacity or power. Since each battery 10 may contain a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is unlimited and can be set according to requirements. A battery can include multiple battery modules, which can be connected in series, parallel, or a combination thereof.

[0069] like Figure 3 The diagram shown is a structural schematic of a battery cell 20 according to an embodiment of this application. The battery cell 20 includes one or more electrode assemblies 22, a housing 211, and an end cap 212. The housing 211 and the end cap 212 form a casing or battery box 21. The walls of the housing 211 and the end cap 212 are both referred to as the walls of the battery cell 20. For a cuboid battery cell 20, the walls of the housing 211 include a bottom wall and four side walls. The shape of the housing 211 depends on the shape of the assembled one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one face of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, when the housing 211 is a hollow cuboid or cube, one plane of the housing 211 is an open face, that is, this plane does not have a wall, allowing communication between the inside and outside of the housing 211. When the housing 211 can be a hollow cylinder, the end face of the housing 211 is an open face, that is, the end face does not have a wall, allowing the inside and outside of the housing 211 to communicate. The end cap 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0070] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the end cap 212. The end cap 212 is typically flat, and the two electrode terminals 214 are fixed to the flat surface of the end cap 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member 23, or a current collector 23, which is located between the end cap 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0071] like Figure 3 As shown, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive tab, the second tab 222a is a negative tab. The first tab 221a of one or more electrode assemblies 22 is connected to an electrode terminal via a connecting member 23, and the second tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive tab via a connecting member 23, and the negative electrode terminal 214b is connected to the negative tab via another connecting member 23.

[0072] In this battery cell 20, depending on actual usage requirements, the electrode assembly 22 can be configured as a single unit or multiple units, such as... Figure 3 As shown, the battery cell 20 contains four independent electrode assemblies 22.

[0073] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold.

[0074] The pressure relief mechanism 213 can be any possible pressure relief structure, and the embodiments of this application are not limited to this. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 with the pressure relief mechanism 213 reaches a threshold; and / or, the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal gas pressure of the battery cell 20 with the pressure relief mechanism 213 reaches a threshold.

[0075] It should be understood that the battery 10 in this embodiment includes multiple battery cells 20 that can be arranged and placed in any direction within the housing 11. For example, as shown in... Figure 3 Taking the rectangular battery cell 20 shown as an example, as Figure 2 As shown, multiple battery cells 20 can be arranged as follows Figure 3The cells are installed vertically inside the housing, such that the end caps 212 of the installed battery cells 20 face the upper housing 111, while the bottom wall of the housing 211 of the battery cells 20 faces the lower housing 112. For example, with... Figure 2 Different, and can also include multiple such Figure 3 The battery cell 20 shown is arranged horizontally inside the box.

[0076] Specifically, Figure 4 Another exploded view of the battery 10 according to one embodiment of this application is shown, as follows: Figure 4 As shown, multiple battery cells 20 can be arranged horizontally inside the housing. Figure 4 As shown, the battery 10 may include a plurality of battery cells 20, which may be arranged in multiple layers, for example, Figure 4 Taking a two-layer battery cell 20 configuration as an example. For the uppermost battery cell 20 in the battery 10, the sidewall with the largest area in each battery cell 20 faces the opening of the lower housing 112, which is the opening towards the upper housing 111. Figure 4 (Not shown in the image). Conversely, for the lowest layer of battery cells 20 in battery 10, the sidewall with the largest area in each battery cell 20 faces the bottom wall of the lower housing 112, that is, towards the wall in the lower housing 112 opposite to the opening. In other words, as shown in the image. Figure 3 and Figure 4 As shown, one end of the end cap 212 of the multiple battery cells 20 faces the side wall of the lower housing 112, that is, the wall of the lower housing 112 adjacent to the opening. Thus, compared to... Figure 2 The installation method of the battery cell 20 shown is as follows. Figure 4 The installation method shown is more conducive to heat dissipation of the battery cell 20.

[0077] To further control the battery cell 20 to operate at a suitable temperature, a cooling system 30 can be installed in the battery 10 to ensure the temperature of the battery 10. Specifically, such as... Figure 4 As shown, the cooling system 30 can be positioned above multiple battery cells 20, so that the larger sidewalls of the battery cells 20 face the cooling system 30, increasing the heat dissipation area of ​​the battery cells 20 and making it more conducive to heat dissipation of the battery cells 20.

[0078] Optionally, an upper housing 111 can be provided above the cooling system 30 so that the upper housing 111 and the lower housing 112 can be fastened together to form the housing of the battery 10; or, the cooling system 30 can be integrated into the upper housing 111 to reduce the space occupied, that is, the cooling system 30 can serve as the upper housing 111 to fasten the lower housing 112 to form the housing 11 of the battery 10.

[0079] Because battery 10 is in a high-temperature and high-humidity environment, condensate is easily generated inside the casing, especially on and around the surface of the cooling system 30. Figure 4 The battery cell installation method shown presents a potential safety hazard when condensate from the cooling system 30 drips onto the electrical connection areas within the battery 10, affecting the safety of the battery 10. Specifically, when the high-temperature and high-humidity gas inside the battery 10 encounters the cooling system 30 within the battery 10's casing 11, condensate will be produced. If this condensate drips onto the electrical connection areas within the battery 10, it may affect the safety of the battery 10.

[0080] Therefore, this application provides a battery 10 that can solve the above problems.

[0081] Figure 5 A schematic diagram of the structure of a battery 10 according to an embodiment of this application is shown. Figure 5 As shown, the battery 10 in this embodiment may include a battery cell group 201. Optionally, the battery 10 may include multiple battery cell groups 201. For any one of the battery cell groups 201, the battery cell group 201 may include multiple battery cells 20.

[0082] Specifically, for any given battery cell group 201, multiple battery cells 20 can be arranged in various ways. For example, as Figure 7 and Figure 8 As shown, the battery cell group 201 may include multiple rows of battery cells, and the multiple rows of battery cells are arranged along the first direction X. Figure 7 and Figure 8 The diagram shows four battery cell groups 201, each battery cell group 201 comprising two battery cell columns. The battery cells 20 in each of the multiple battery cell columns can be arranged along a second direction Y, where a first direction X is perpendicular to the second direction Y.

[0083] The battery 10 also includes a cooling system 30. The cooling system 30 contains a cooling medium to reduce the temperature of the battery cells 20. Figure 5 and Figure 8As shown, the cooling system 30 can be disposed on the first surface 2111 of the battery cell assembly 201. It should be understood that, depending on the orientation of the multiple battery cells 20 within the casing 11 of the battery 10, the first surface 2111 can refer to any surface of the battery cell assembly 201. Taking a cuboid battery cell 20 as an example, to increase the heat dissipation capacity of the battery cell 20, the cooling system 30 can be disposed above the side wall with the largest area. Then, the side of the battery cell assembly 201 facing the cooling system 30, i.e., the first surface 2111, is the surface with the largest area of ​​the battery cell assembly 201. This increases the heat dissipation speed of the battery cell assembly 201, achieving a better temperature regulation effect. Optionally, as... Figure 8 As shown, the battery cell pack 201 and the cooling system 30 can be bonded together with structural adhesive 31.

[0084] The battery 10 also includes a signal transmission component 24. The signal transmission component 24 is disposed on the second surface 2112 of the battery cell assembly 201. The second surface 2112 is adjacent to the first surface 2111. Specifically, the signal transmission component 24 can be used to transmit voltage and / or temperature signals of the battery cell 20. For example, as... Figure 6 As shown, the signal transmission component 24 may include a busbar component 121 and an insulating layer 122. The insulating layer 122 is used to encapsulate the busbar component 121 and has an opening 123. The busbar component 121 is used to electrically connect to the battery cell 20 in the battery cell group 201 at the opening 123.

[0085] Optionally, the insulating layer 122 can encapsulate the busbar component 121 by thermo-pressing, and by providing openings, the busbar component 121 can achieve electrical connection between battery cells 20 in the battery cell pack 201 through the openings.

[0086] The signal transmission component 24 can be used to realize various forms of electrical connection between battery cells 20. For example, the electrical connection area within the battery 10 may include the electrical connection area formed by the bus component 121. In addition, a sensor (not shown) for sensing the state of the battery cells 20 may also be disposed within the battery 10, and the electrical connection area within the battery 10 may also include the electrical connection area in the sensor. Optionally, the signal transmission component 24 may include the sensor, and the insulating layer 122 may also be used to encapsulate the sensor.

[0087] Considering such Figure 5The arrangement of the battery cell 20 and cooling system 30 shown can easily lead to condensation inside the battery 10 when it is in a high-temperature and high-humidity environment. Condensation, especially from the cooling system 30, may drip onto the electrical connection areas within the battery 10, for example, onto the busbar 121. This could cause a short circuit and battery failure, affecting battery safety. Therefore, as... Figure 5 As shown, the battery 10 may also include a shield 25. The shield 25 is connected to the battery cell assembly 201 and protrudes from the edge of the first surface 2111. The shield 25 is used to prevent condensate generated by the cooling system 30 from reaching the signal transmission assembly 24. Specifically, the shield 25 may be connected to the first surface 2111 or the second surface 2112 of the battery cell assembly 201.

[0088] Therefore, in this embodiment of the battery 10, a cooling system 30 is provided on its first surface 2111, and a signal transmission component 24 is provided on its second surface 2112 adjacent to the first surface 2111 to realize electrical connection between multiple battery cells 20. In addition, the battery 10 also includes a shielding member 25 connected to and protruding from the edge of the first surface 2111 to prevent the condensate generated by the cooling system 30 from reaching the signal transmission component 24, thereby avoiding short circuit of the battery 10 and improving the safety of the battery 10.

[0089] Optionally, in one embodiment of this application, the orthographic projection of the shielding member 25 on a plane parallel to the first surface 2111 covers the orthographic projection of the signal transmission component 24 on the same plane. That is, the shielding member 25 extends beyond the area corresponding to the signal transmission component 24. In the event of condensation generated by the cooling system 30, the shielding member 25 can act as a "roof," guiding the condensate to an area outside the signal transmission component 24, such as the space between two opposing battery cell groups 201, thereby protecting the signal transmission component 24.

[0090] Optionally, in one embodiment of this application, the shielding member 25 is made of an insulating material, such as an insulating sheet, which can ensure the insulation of the signal transmission component 24 and further improve the safety of the battery 10.

[0091] Optionally, in one embodiment of this application, the shielding member 25 may be fixed between the first surface 2111 and the cooling system 30. The shielding member 25 does not need to cover the entire first surface 2111 of the battery cell assembly 201, for example... Figure 5As shown, the shielding member 25 is fixed between the first surface 2111 of the battery cell assembly 201 and the cooling system 30, and only contacts the first surface 2111 near its edge. One end of the shielding member 25 is aligned with the structural adhesive 31, so it will not affect the adhesion of the structural adhesive 31 to the battery cell assembly 201 and the cooling system 30. Furthermore, the shielding member 25 is in direct contact with the cooling system 30, and the contact area between the two is relatively large, which can better guide the condensate.

[0092] Optionally, in one embodiment of this application, the shielding member 25 may also be fixed to the second surface 2112 of the battery cell assembly 201, and the end of the shielding member 25 near the cooling system 30 is bent to protrude from the edge of the first surface 2111. The shielding member 25 may be fixed on the area of ​​the second surface 2112 of the battery cell assembly 201 above the signal transmission component 24. Since the distance between it and the signal transmission component 24 can be set close enough, the protection effect on the signal transmission component 24 is better. The shielding member 25 fixed to the second surface 2112 may be a single unit or may be composed of multiple sub-shielding members. Specifically, the shielding member 25 includes multiple sub-shielding members respectively disposed on the first wall of multiple battery cells 20 in the first battery cell row, wherein the first battery cell row is the row of battery cells in the battery cell assembly 201 connected to the cooling system 30, and the first wall is the wall of the battery cell 20 on the second surface 2112.

[0093] Regardless of the method used to install the shield 25, as long as the shield 25 can form a shield above the signal transmission component 24 to prevent the condensate generated by the cooling system 30 from reaching the signal transmission component 24, it is acceptable. In this embodiment, the shield 25 is fixed between the first surface 2111 of the battery cell assembly 201 and the cooling system 30 as an example.

[0094] Optionally, in one embodiment of this application, such as Figure 9 and Figure 10 As shown, the protruding portion of the shielding member 25 protruding from the edge of the first surface 2111 is parallel to the first surface 2111. In this way, the condensate generated by the cooling system 30 is collected in the region 32 between the shielding members 25 of the two opposing battery cell groups 201, i.e., the region 32 of the cooling system 30 that is not in contact with the shielding member 25. This prevents condensate from forming directly above the signal transmission component 24, enhancing battery safety. In this configuration, the shielding member 25 has a planar structure, resulting in lower manufacturing complexity.

[0095] Optionally, in one embodiment of this application, such as Figure 5 and Figure 7As shown, the protruding portion of the shield 25 protruding from the edge of the first surface 2111 bends toward the second surface 2112. After the shield 25 is bent, the bent portion can guide the condensate, making it easier to collect the condensate in the space between the two battery cell groups 201, thus limiting the condensate from reaching the signal transmission component 24.

[0096] Furthermore, in one embodiment of this application, such as Figure 11 and Figure 12 As shown, the protruding portions of the shielding members 25 of two opposing battery cell packs 201 are connected to form a groove 251, which is used to collect condensate. The depth of the groove 251 can be determined based on the degree of bending of the shielding member 25. When condensate generated by the cooling system 30 drips at the shielding member 25, it can be collected by the groove 251. The condensate collected by the groove 251 can be discharged at an appropriate time, such as when the vehicle is going uphill or downhill, the condensate in the groove 251 is naturally discharged to the rear or front end of the battery cell pack 201. Optionally, the protruding portions of the shielding members 25 of the two opposing battery cell packs 201 can be connected by a connecting strip (not shown) to form the groove 251. Alternatively, the shielding members 25 of the two opposing battery cell packs 201 can be integrally formed to form the groove 251, thereby improving the reliability of the shielding member 25.

[0097] Furthermore, in one embodiment of this application, such as Figure 13 As shown, a drain hole 252 is provided at the bottom of the groove 251 for draining the condensate. This allows the condensate collected in the groove 251 to be drained more promptly into the space between the two opposing battery cell groups 201, preventing excessive accumulation of condensate within the groove 251. The embodiments of this application do not limit the number or shape of the drain holes 252.

[0098] Optionally, in one embodiment of this application, such as Figure 14 As shown, the battery 10's housing 11 is equipped with a liquid storage tank 113 corresponding to the shield 25. The shield 25 is used to guide the condensate into the liquid storage tank 113. When the cooling system 30 generates condensate, the condensate drips along the shield 25 into the liquid storage tank 113, or first drips into the groove 251, and then the groove 251 guides the condensate into the liquid storage tank 113, thereby keeping the condensate away from the signal transmission component 24 of the battery 10, thus enhancing battery safety. The liquid storage tank 113 can be located at the bottom of the housing 11. Optionally, a gravity valve can be installed in the liquid storage tank 113, which is used to discharge the condensate in the liquid storage tank 113 from the housing 11 when the condensate accumulates to a certain level. Optionally, the liquid storage tank 113 may not be equipped with a gravity valve, but can be directly connected to the outside of the housing 11, for example, through a through hole in the wall of the housing 11.

[0099] Optionally, in one embodiment of this application, such as Figure 15 As shown, the end of the groove 251 is connected to the wall of the housing 11 of the battery 10, and the groove 251 communicates with a cavity inside the wall of the housing 11 to guide the condensate into the cavity. This cavity can be a cavity that originally existed inside the wall of the housing 11. Optionally, the cavity can also be as shown... Figure 15 The specially designed liquid storage tank 113 is shown. Since the end of the groove 251 is connected to the cavity inside the wall of the battery housing 11, when the cooling system 30 generates condensate, the condensate drips down the bend of the shield 25 into the groove 251. The groove 251 guides the condensate from its end into the cavity inside the wall of the housing 11 to store the condensate, or further discharges it from the housing 11, thereby keeping the condensate away from the signal transmission component 24 of the battery 10, thus enhancing the safety of the battery 10.

[0100] One embodiment of this application also provides an electrical device that may include the battery 10 from the foregoing embodiments for providing electrical power to the device. Optionally, the electrical device may be a vehicle 1, a ship, or a spacecraft.

[0101] The foregoing described the battery and electrical device of the present application embodiments. The following will describe the method and apparatus for preparing the battery of the present application embodiments, wherein parts not described in detail can be referred to the foregoing embodiments.

[0102] Figure 16 A schematic flowchart of a method 300 for preparing a battery according to an embodiment of this application is shown. Figure 16 As shown, the method 300 may include: 310, providing a battery cell assembly 201, the battery cell assembly 201 including a plurality of battery cells 20; 320, providing a cooling system 30 disposed on a first surface 2111 of the battery cell assembly 201; 330, providing a signal transmission component 24 disposed on a second surface 2112 of the battery cell assembly 201, the second surface 2112 being adjacent to the first surface 2111, the signal transmission component 24 including a busbar 121 and an insulating layer 122, the insulating layer 122 encapsulating the busbar 121, the insulating layer 122 having an opening, the busbar 121 being used for electrical connection with the battery cells 20 in the battery cell assembly 201 at the opening; 340, providing a shielding member 25 connected to the battery cell assembly 201 and protruding from the edge of the first surface 2111, the shielding member 25 being used to prevent condensate generated by the cooling system 30 from reaching the signal transmission component 24.

[0103] Figure 17 A schematic block diagram of a battery manufacturing apparatus 400 according to one embodiment of this application is shown. Figure 17As shown, the battery manufacturing apparatus 400 may include a providing module 410 for: providing a battery cell assembly 201, the battery cell assembly 201 including a plurality of battery cells 20; providing a cooling system 30 disposed on a first surface 2111 of the battery cell assembly 201; providing a signal transmission component 24 disposed on a second surface 2112 of the battery cell assembly 201, the second surface 2112 being adjacent to the first surface 2111, the signal transmission component 24 including a busbar 121 and an insulating layer 122, the insulating layer 122 encapsulating the busbar 121, the insulating layer 122 having an opening, the busbar 121 being used for electrical connection with the battery cells 20 in the battery cell assembly 201 at the opening; and providing a shielding member 25 connected to the battery cell assembly 201 and protruding from the edge of the first surface 2111, the shielding member 25 being used to prevent condensate generated by the cooling system 30 from reaching the signal transmission component 24.

[0104] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: A battery cell pack (201) includes multiple battery cells (20). A cooling system (30) is provided on the first surface (2111) of the battery cell group (201); A signal transmission component (24) is disposed on the second side (2112) of the battery cell group (201), the second side (2112) being adjacent to the first side (2111). The signal transmission component (24) includes a busbar (121) and an insulating layer (122). The insulating layer (122) encapsulates the busbar (121) and has an opening. The busbar (121) is used to electrically connect with a battery cell (20) in the battery cell group (201) at the opening. A shield (25) is connected to the battery cell assembly (201) and protrudes from the edge of the first surface (2111). The shield (25) is used to block the condensate generated by the cooling system (30) from reaching the signal transmission component (24). The shielding member (25) protrudes from the edge of the first surface (2111) and bends toward the second surface (2112). The battery includes a plurality of battery cell groups (201). The protruding portions of the shielding members (25) of two battery cell groups (201) arranged opposite to each other are connected to form a groove (251). The groove (251) is used to collect the condensate.

2. The battery according to claim 1, characterized in that, The orthographic projection of the shielding member (25) on a plane parallel to the first surface (2111) covers the orthographic projection of the signal transmission component (24) on a plane parallel to the first surface (2111).

3. The battery according to claim 1 or 2, characterized in that, The protruding portion of the shielding member (25) protruding from the edge of the first surface (2111) is parallel to the first surface (2111).

4. The battery according to claim 1, characterized in that, The bottom of the groove (251) is provided with a drain hole (252) for draining the condensate.

5. The battery according to claim 1 or 4, characterized in that, The protruding portions of the shielding members (25) of the two opposing battery cell groups (201) are connected by a connecting strip to form the groove (251).

6. The battery according to claim 1 or 4, characterized in that, The shielding member (25) of the two opposing battery cell groups (201) is integrally formed to form the groove (251).

7. The battery according to claim 1, characterized in that, The material of the shield (25) is an insulating material.

8. The battery according to claim 1, characterized in that, The battery housing is provided with a liquid storage tank (113) corresponding to the shield (25), and the shield (25) is used to introduce the condensate into the liquid storage tank (113).

9. The battery according to claim 1, characterized in that, The end of the groove (251) is connected to the wall of the battery casing, and the groove (251) communicates with the cavity inside the wall of the casing to introduce the condensate into the cavity.

10. The battery according to claim 1, characterized in that, The shield (25) is fixed between the first surface (2111) and the cooling system (30).

11. The battery according to claim 1, characterized in that, The shield (25) is fixed to the second surface (2112), and the shield (25) is bent at one end near the cooling system (30) to protrude from the edge of the first surface (2111).

12. The battery according to any one of claims 1 to 11, characterized in that, The battery cell group (201) includes N battery cells (20) columns, the N battery cells (20) columns are arranged along a first direction, and the battery cells (20) in each of the N battery cells (20) columns are arranged along a second direction, the first direction is perpendicular to the second direction, and N is a positive integer; The first surface (2111) is perpendicular to the first direction, and the second surface (2112) is parallel to the plane defined by the first direction and the second direction.

13. An electrical appliance, characterized in that, include: The battery according to any one of claims 1 to 12 is used to provide electrical energy.

14. A method for preparing a battery, characterized in that, include: Provide multiple battery cell packs (201), each battery cell pack (201) comprising multiple battery cells (20). A cooling system (30) is provided, the cooling system (30) being disposed on the first side (2111) of the battery cell pack (201); A signal transmission component (24) is provided, the signal transmission component (24) being disposed on a second side (2112) of the battery cell group (201), the second side (2112) being adjacent to the first side (2111), the signal transmission component (24) including a busbar (121) and an insulating layer (122), the insulating layer (122) encapsulating the busbar (121), the insulating layer (122) having an opening, the busbar (121) being used for electrical connection with a battery cell (20) in the battery cell group (201) at the opening; A shield (25) is provided, which is connected to the battery cell assembly (201) and protrudes from the edge of the first surface (2111). The shield (25) is used to block the condensate generated by the cooling system (30) from reaching the signal transmission component (24). The shielding member (25) has a protruding portion protruding from the edge of the first surface (2111) that bends toward the second surface (2112). The protruding portions of the shielding members (25) of the two battery cell groups (201) arranged opposite to each other are connected to form a groove (251), which is used to collect the condensate.

15. An apparatus for manufacturing batteries, characterized in that, Includes a providing module (410), which is used for: Provide multiple battery cell packs (201), each battery cell pack (201) comprising multiple battery cells (20). A cooling system (30) is provided, the cooling system (30) being disposed on the first side (2111) of the battery cell pack (201); A signal transmission component (24) is provided, the signal transmission component (24) being disposed on a second side (2112) of the battery cell group (201), the second side (2112) being adjacent to the first side (2111), the signal transmission component (24) including a busbar (121) and an insulating layer (122), the insulating layer (122) encapsulating the busbar (121), the insulating layer (122) having an opening, the busbar (121) being used for electrical connection with a battery cell (20) in the battery cell group (201) at the opening; A shield (25) is provided, which is connected to the battery cell assembly (201) and protrudes from the edge of the first surface (2111). The shield (25) is used to block the condensate generated by the cooling system (30) from reaching the signal transmission component (24). The shielding member (25) has a protruding portion protruding from the edge of the first surface (2111) that bends toward the second surface (2112). The protruding portions of the shielding members (25) of the two battery cell groups (201) arranged opposite to each other are connected to form a groove (251), which is used to collect the condensate.

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