Battery, electric device, method and apparatus for manufacturing battery
By installing sealing components and insulating layers to encapsulate the busbar components in the battery cell pack, combined with a cooling system to reduce temperature, the safety hazards caused by condensation in the battery in high temperature and high humidity environments are solved, thus improving the safety and lifespan of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2021-07-30
- Publication Date
- 2026-06-26
AI Technical Summary
Batteries are prone to condensation in high temperature and high humidity environments, which can lead to safety hazards and affect the safety and lifespan of the battery.
A sealing component is installed in the battery cell pack to prevent the condensate generated by the cooling system from reaching the busbar, thus preventing short circuits and corrosion. The busbar is encapsulated with an insulating layer and electrically connected at the opening. Combined with the cooling system, the battery cells are cooled down.
It improves battery safety performance, prevents safety problems such as fire and explosion caused by short circuits and corrosion, and extends battery life.
Smart Images
Figure CN116349058B_ABST
Abstract
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 group comprising N battery cell columns arranged along a first direction, wherein the battery cells in each of the N battery cell columns are arranged along a second direction, the first direction being perpendicular to the second direction, and N being an integer greater than 1; a signal transmission component disposed on a first surface of the battery cell group, the first surface being parallel to a plane defined by the first and second directions, the signal transmission component comprising a busbar and an insulating layer, the insulating layer being used to encapsulate the busbar, the insulating layer having an opening, the busbar being used to electrically connect with a battery cell in the battery cell group at the opening; and a cooling system disposed between two adjacent battery cell columns in the N battery cell columns; wherein a sealing member is provided at the opening of the gap between the two adjacent battery cell columns facing the first surface, the sealing member being used to seal the opening to prevent condensate generated by the cooling system from reaching the busbar.
[0007] This application provides a battery comprising a battery cell pack, a signal transmission component, and a cooling system. The signal transmission component includes a busbar for transmitting electrical energy from the battery cell pack and an insulating layer for encapsulating the busbar. The insulating layer reduces the impact of external environmental factors on the busbar, ensuring its transmission and safety performance. To enable electrical connection between the busbar and the battery cell pack, the insulating layer has openings, allowing the busbar to connect electrically with individual battery cells at these openings. The cooling system is positioned between adjacent rows of battery cells within the battery cell pack. It cools the individual cells, preventing overheating and safety issues. Simultaneously, a sealing element is provided at the opening in the first plane of the battery cell pack between the adjacent rows of cells to prevent condensate from reaching the busbar in the signal transmission component. This prevents short circuits and corrosion caused by the condensate, thus preventing fires and explosions that could result from short circuits, improving battery safety, and also preventing battery life issues caused by corrosion, thereby extending the overall battery lifespan.
[0008] In one possible implementation, the sealing element extends into the gap, improving the stability of the sealing element in the gap and reducing the amount of air entering the gap, thereby reducing the possibility of condensation in the cooling system and improving the sealing effect of the sealing element.
[0009] In one possible implementation, the sealing element is connected to the cooling system within the gap.
[0010] In this technical solution, the entry of air between the sealing component and the cooling system can be greatly reduced or avoided, thereby better preventing the cooling system from generating condensate and further improving the sealing effect of the sealing component.
[0011] In one possible implementation, the sealing element is made of a liquid-absorbing material.
[0012] With this implementation, even if a small amount of air comes into contact with the cooling system and generates condensate, the sealing component can absorb the condensate, preventing it from moving in the battery and reaching the busbar or other components, thus avoiding safety hazards.
[0013] In one possible implementation, the sealing element is elastic and is compressed between the insulating layer and the first surface.
[0014] In this embodiment, the sealing member is elastic, facilitating its installation in the gap between two adjacent battery cell rows. When the sealing member is compressed within the gap, it exerts a certain force on the battery cells, improving the installation stability and sealing effect at the gap. Furthermore, in addition to being compressed and positioned in the gap between two adjacent battery cell rows, the sealing member is also compressed and positioned between the insulating layer and the first surface of the battery cell group, thus further improving the installation stability and sealing effect.
[0015] In one possible implementation, the insulating layer protrudes toward the opening to form the sealing element.
[0016] In this implementation, the sealing component can also reuse existing components in the battery, such as the insulation layer formation, without the need for additional components for sealing, which can reduce the manufacturing cost of the battery.
[0017] In one possible implementation, the sealing element has a convex or Ω-shaped cross-section on a plane perpendicular to the second direction.
[0018] In one possible implementation, the sealing element is a strip-shaped sealing element that extends along the second direction.
[0019] In a second aspect, an electrical device is provided, comprising: a battery as described in the first aspect or any possible implementation thereof, the battery being used to provide electrical energy.
[0020] Thirdly, a method for manufacturing a battery is provided, comprising: providing a battery cell assembly, the battery cell assembly comprising N battery cell columns arranged along a first direction, the battery cells in each of the N battery cell columns arranged along a second direction, the first direction being perpendicular to the second direction, and N being an integer greater than 1; providing a signal transmission component disposed on a first surface of the battery cell assembly, the first surface being parallel to a plane defined by the first and second directions, the signal transmission component comprising a busbar and an insulating layer, the insulating layer being used to encapsulate the busbar, the insulating layer having an opening, the busbar being used to electrically connect with a battery cell in the battery cell assembly at the opening; and providing a cooling system disposed between two adjacent battery cell columns in the N battery cell columns; wherein a sealing member is provided at the opening of the gap between the two adjacent battery cell columns facing the first surface, the sealing member being used to seal the opening to prevent condensate generated by the cooling system from reaching the busbar.
[0021] Fourthly, an apparatus for manufacturing batteries is provided, comprising a module for performing the method described in the third aspect.
[0022] The technical solution of this application embodiment provides a battery including a battery cell pack, a signal transmission component, and a cooling system. The cooling system is disposed between two adjacent rows of battery cells in the battery cell pack and can be used to cool the battery cells in the battery cell pack to prevent the battery cells from overheating and causing safety problems. At the same time, the gap between the two adjacent rows of battery cells is provided with a sealing component at the opening of the first plane of the battery cell pack to prevent the condensate generated by the cooling system from reaching the busbar in the signal transmission component. This prevents the condensate from causing short circuits, corrosion, and other problems in the busbar, thereby preventing safety problems such as fires and explosions caused by short circuits, improving the safety performance of the battery, and also preventing battery life problems caused by corrosion, thus improving the overall life of the battery. Attached Figure Description
[0023] 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.
[0024] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of this application;
[0025] Figure 2 This is a schematic diagram of a battery according to an embodiment of this application;
[0026] Figure 3 This is a schematic diagram of a battery according to an embodiment of this application;
[0027] Figure 4 This is a schematic diagram of a battery cell according to an embodiment of this application;
[0028] Figure 5 This is a schematic exploded view of a battery according to an embodiment of this application;
[0029] Figure 6 This is a schematic cross-sectional view of a battery according to an embodiment of this application;
[0030] Figure 7 yes Figure 6 A schematic enlarged view of the area where the sealing component is located;
[0031] Figure 8 yes Figure 6 A schematic enlarged view of the area where the sealing component is located;
[0032] Figure 9 yes Figure 6 A schematic enlarged view of the area where the sealing component is located;
[0033] Figure 10 yes Figure 6 A schematic enlarged view of the area where the sealing component is located;
[0034] Figure 11 yes Figure 10 A partial three-dimensional schematic diagram of the sealing component in the illustrated embodiment;
[0035] Figure 12 This is a schematic flowchart of a method for preparing a battery according to an embodiment of this application;
[0036] Figure 13 This is a schematic block diagram of an apparatus for preparing a battery according to an embodiment of this application.
[0037] The accompanying drawings are not drawn to scale. Detailed Implementation
[0038] 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.
[0039] 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.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] The shape of the battery casing can be determined based on the number of battery cells it houses. In some embodiments, the casing can be square with six walls. Optionally, the bottom and top walls of the casing can integrate the aforementioned cooling system to cool the battery cells at the bottom and top of the casing, respectively. The side walls of the casing are provided with beams, each beam comprising multiple sub-walls forming a hollow beam structure, i.e., the beam has cavities inside. Optionally, in addition to the bottom and top of the casing, a cooling system can also be provided in the middle of the casing, for example, between multiple battery cells, to further enhance the cooling effect.
[0050] In high-temperature and high-humidity environments, batteries are prone to condensation inside their casings, posing a safety hazard and affecting battery safety. Specifically, when the high-temperature and high-humidity gases inside the battery encounter the cooling system within the casing, condensation is produced. If this condensation drips onto the electrical connection areas inside the battery, it may compromise battery safety.
[0051] In view of this, this application provides a technical solution in which a sealing component is provided in the gap between battery cells to prevent the condensate generated by the cooling system between battery cells from reaching the electrical connection area inside the battery and affecting the electrical connection area, thereby enhancing the safety of the battery.
[0052] In addition to the battery cells and cooling components mentioned above, the battery housing may also include a busbar and other battery components. In some embodiments, the housing may also include a structure for securing the battery cells.
[0053] Busbars are used to achieve electrical connections between multiple battery cells, such as in parallel, series, or a combination thereof. Busbars achieve electrical connections between battery cells by connecting the electrode terminals of the battery cells. In some embodiments, busbars can be fixed to the electrode terminals of the battery cells by welding. The electrical connection formed by the busbar can also be referred to as a "high-voltage connection."
[0054] In addition to the busbar component, sensors can also be installed within the battery to sense the state of individual battery cells, such as temperature and state of charge. In this embodiment, the electrical connection area within the battery may include the electrical connection area formed by the busbar component and / or the electrical connection area within the sensor.
[0055] 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.
[0056] The battery casing can also be equipped with a pressure balancing mechanism 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.
[0057] 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.
[0058] 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.
[0059] 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.
[0060] 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 14, a controller 13, and a battery 10 can be installed inside vehicle 1. The controller 13 controls the battery 10 to supply power to the motor 14. 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, the battery 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as 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 for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.
[0061] 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 multiple battery cells 20. The battery 10 may also include a housing 11, which has a hollow interior structure, and the multiple battery cells 10 are housed within the housing 11. Figure 2As 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 can be determined according to the shape of the combination of multiple battery cells 20. Both the first part 111 and the second part 112 may have an opening. For example, both the first part 111 and the second part 112 can be hollow cuboids with only one side as an opening. The openings of the first part 111 and the second part 112 are arranged opposite to each other, and the first part 111 and the second part 112 are fastened together to form a housing 11 with a closed cavity. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed inside the housing 11 formed by the fastening of the first part 111 and the second part 112.
[0062] 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 11 via a conductive mechanism. Optionally, the conductive mechanism may also be part of the busbar component.
[0063] 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.
[0064] Optionally, such as Figure 3 As shown, the first part 111 of the housing 11 can be a flat top cover without openings, i.e., the first part 111 is a flat top cover. This top cover can integrate cooling components to cool the battery cells 20 at the top of the housing 11. The second part 112 of the housing 11 is a cavity with openings, including a bottom wall and side walls. The bottom wall can integrate cooling components to cool the battery cells 20 at the bottom of the housing 11. The side walls can be provided with beams, each beam comprising multiple sub-walls forming a hollow beam structure, i.e., the beam has an internal cavity.
[0065] Alternatively, in addition to the bottom and top of the housing 11, a cooling component can also be provided in the middle of the housing 11. For example, a cooling component can also be provided between the upper and lower rows of battery cells 20 to further enhance the cooling effect.
[0066] Optionally, the wall of the battery cell 20 with electrode terminals inside the housing 11 can be perpendicular to the bottom wall of the housing 11. That is, the battery cell 20 can be placed horizontally ("lying flat"). In this way, a cooling component can be provided between every two rows of battery cells 20 in the direction perpendicular to the bottom wall of the housing 11, and correspondingly, cooling components are provided on both sides of each battery cell 20. Optionally, the side wall with the largest area of each battery cell 20 is connected to the cooling component, thereby achieving maximum cooling of the battery cell 20.
[0067] like Figure 4 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 a cover plate 212. The housing 211 and the cover plate 212 form an outer shell or battery box 21. The walls of the housing 211 and the cover plate 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 combined one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one side 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 surface, 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, so that the inside and outside of the housing 211 are connected. The cover plate 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.
[0068] The battery cell 20 may also include two electrode terminals 214, which can be disposed on a cover plate 212. The cover plate 212 is typically flat, and the two electrode terminals 214 are fixed to the flat surface of the cover plate 212. The two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. Each electrode terminal 214 is provided with a corresponding connecting member 23, or a current collector 23, which is located between the cover plate 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.
[0069] like Figure 4As 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.
[0070] 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 4 As shown, the battery cell 20 contains four independent electrode assemblies 22.
[0071] 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.
[0072] 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.
[0073] Figure 5 A schematic exploded view of a battery 10 provided in an embodiment of this application is shown.
[0074] like Figure 5 As shown, the battery 10 includes: a battery cell group 110, which includes N battery cell columns 113, the N battery cell columns 113 are arranged along a first direction, and the battery cells 20 of each battery cell column 113 are arranged along a second direction, wherein the first direction is perpendicular to the second direction, and N is an integer greater than 1.
[0075] As an illustration. Figure 5 In the diagram, the z-direction is the first direction, and the x-direction is the second direction. In the x-direction, multiple battery cells 20 are arranged to form a battery cell column 113. In the z-direction, N battery cell columns 113 are arranged sequentially. Figure 5 In the illustrated embodiment, two battery cell rows 113 are schematically arranged sequentially in the z-direction.
[0076] Optionally, in some embodiments, the z-direction can be a direction perpendicular to the horizontal plane of the earth. When the battery cell group 110 is disposed on the horizontal plane of the earth, the N battery cell columns 113 in the battery cell group 110 are stacked along the z-direction.
[0077] See also Figure 5 The battery 10 in this embodiment further includes a signal transmission component 120 disposed on the first surface 101 of the battery cell group 110. The first surface 101 is parallel to the plane defined by the first direction and the second direction. The signal transmission component 120 includes 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 with the battery cell 20 in the battery cell group 110 at the opening 123.
[0078] Specifically, in Figure 5 In the illustrated embodiment, the battery cell 20 in the battery cell group 110 can be approximately understood as a block-shaped battery cell, for example, it can be a cubic structure or a cuboid structure. The surface of the battery cell 20 where the electrode terminal 214 is provided can be referred to as the first surface of the battery cell 20. When multiple battery cells 20 are arranged along the x-direction to form a battery cell column 113, the multiple first surfaces of the multiple battery cells 20 are spliced together to form a large plane, referred to as the first surface of the battery cell column 113. Further, when N battery cell columns 113 are arranged along the z-direction to form a battery cell group 110, the first surfaces of the N battery cell columns 113 are spliced together to form an even larger plane, referred to as the first surface 101 of the battery cell group 110. The first surface of the battery cell group 110 is parallel to the plane determined by the z-direction and the x-direction. That is, in this embodiment, the first surface 101 of the battery cell group 110 is parallel to the xz plane.
[0079] Furthermore, a signal transmission component 120 for the battery 10 is provided on the first plane 101 of the battery cell group 110. Specifically, the signal transmission component 120 includes a busbar 121 and an insulating layer 122. The busbar 121 can be connected to the electrode terminals of multiple battery cells 20 and is used to transmit the electrical energy of the multiple battery cells 20. Since the busbar 121 is used to transmit the electrical energy of multiple battery cells 20, its transmission performance and safety performance are very important for the battery 10. Therefore, the signal transmission component 120 also includes an insulating layer 122 to encapsulate the busbar 121, reduce the impact of external environmental factors on the busbar 121, and ensure the transmission performance and safety performance of the busbar 121. However, in order to realize the electrical connection between the busbar 121 and the electrode terminals of the multiple battery cells 20, an opening 123 is formed in the insulating layer 122. The busbar 121 is used to electrically connect with the electrode terminals 214 of the battery cells 20 in the battery cell group 110 at the opening 123.
[0080] See also Figure 5 The battery 10 in this embodiment further includes a cooling system 130, which is disposed between two adjacent battery cell rows 113 in the N battery cell rows 113. The gap between the two adjacent battery cell rows 113 is provided with a sealing member 140 facing the opening of the first plane 101 of the battery cell group 110 to prevent the condensate generated by the cooling system 130 from reaching the manifold 121.
[0081] Optionally, in Figure 5 In the embodiment shown, the cooling system 130 may include a cooling plate, which may be disposed between two adjacent battery cell rows 113 in the N battery cell rows 113, and the cooling plate may be disposed perpendicular to the first plane 101 of the battery cell group 110.
[0082] Based on this technical solution, the cooling system 130 is disposed between two adjacent battery cell rows 113, which can cool down the battery cells 20 in the two adjacent battery cell rows 113. Optionally, the cooling system 130 may include a cooling plate, which has a large corresponding area with the battery cells 20 in the two adjacent battery cell rows 113, and has a better cooling effect on the battery cells 20.
[0083] like Figure 5 As shown, in order to reduce the impact of the condensate formed on the cooling system 130 on the signal transmission component 120 (especially the busbar component 121 in the signal transmission component 120) disposed on the first surface 101 of the battery cell group 110, the cooling system 130 is not in contact with the first surface 101 of the battery cell group 110, so that there is a gap between two adjacent battery cell rows 113.
[0084] To further reduce the impact of condensate formed on the cooling system 130 on the busbar component 121 in the signal transmission assembly 120, a sealing member 140 is provided in the gap between two adjacent rows of battery cells 113 at the opening of the first plane 101 of the battery cell group 110, or in other words, the gap between two adjacent rows of battery cells 113 at the opening of the first plane 101 of the battery cell group 110, to prevent condensate generated by the cooling system 130 from reaching the busbar component 121. Specifically, the sealing member 140 can prevent condensate generated by the cooling system 130 from reaching the busbar component 121 at the opening 123 of the insulating layer 122, preventing condensate from causing short circuits, corrosion, or other problems in the busbar component 121.
[0085] Based on the above technical solution, this application embodiment provides a battery 10 including a battery cell pack 110, a signal transmission component 120, and a cooling system 130. The signal transmission component 120 includes a busbar component 121 for transmitting electrical energy from the battery cell pack 113 and an insulating layer 122 for encapsulating the busbar component 121. The insulating layer 122 can reduce the impact of external environmental factors on the busbar component 121, ensuring the transmission performance and safety performance of the busbar component 121. In order to realize the electrical connection between the busbar component 121 and the battery cell pack 110, an opening 123 is provided in the insulating layer 122. The busbar component 121 is used to electrically connect with the battery cell 20 in the battery cell pack 110 at the opening 123. In addition, the cooling system 130 can be disposed between two adjacent rows of battery cells 113 in the battery cell group 110. It can be used to cool down the battery cells 20 in the battery cell group 110 to prevent the battery cells 20 from overheating and causing safety problems. At the same time, the gap between the two adjacent rows of battery cells 113 is provided with a sealing member 140 in the opening of the first plane 101 of the battery cell group 110 to prevent the condensate generated by the cooling system 130 from reaching the busbar 121 in the signal transmission component 120. This prevents the condensate from causing short circuits, corrosion and other problems in the busbar 121, thereby preventing safety problems such as fire and explosion caused by short circuits, and also preventing battery performance and life problems caused by corrosion.
[0086] Understandable, Figure 5 The illustration only shows the case where the battery cell group 110 includes two battery cell columns 113 arranged in the z direction. In addition, the battery cell group 110 may include more battery cell columns 113 in the z direction. A cooling system 130 may be provided between each pair of adjacent battery cell columns 113, or a cooling system 130 may be provided between some of the pairs of adjacent battery cell columns 113.
[0087] It is also understandable that Figure 5In addition to the x and z directions mentioned above, the three-dimensional space may also include a y direction perpendicular to the x and z directions. Optionally, the battery 10 in this embodiment may include multiple battery cell groups 113, which may be arranged along the y direction. Optionally, two adjacent battery cell groups 113 in the y direction may be mirror images of each other.
[0088] The above text combined Figure 5 The basic technical solution of the battery 10 provided in the embodiments of this application has been introduced. Below, in conjunction with... Figures 6 to 9 This section explains the relevant technical solutions for each component in the battery 10 of the embodiments of this application.
[0089] Figure 6 A schematic cross-sectional view of the battery 10 provided in an embodiment of this application is shown. Optionally, the... Figure 6 The cross-sectional view shown can be Figure 5 A schematic cross-sectional view of the middle battery 10 along the yz plane.
[0090] like Figure 6 As shown, the signal transmission component 120 includes two insulating layers 122, and a busbar component 121 is disposed between the two insulating layers 122. Figure 6 (not shown in the image), and the two insulating layers 122 are used to cover the busbar component 121 to encapsulate the busbar component 121.
[0091] Optionally, in addition to the bus component 121, the signal transmission assembly 120 also includes a sensing component (not shown). Similarly, this sensing component is disposed between the two insulating layers 122, which further encapsulate the sensing component. As an example, the sensing component may include a sensor and a transmission line. The sensor includes, but is not limited to, a sensor for sensing state signals such as temperature, voltage, and current of the battery cell 20. The state signals of the battery cell 20 sensed by the sensor are transmitted through the transmission line, which may be, for example, an electrical signal transmission line or a flexible circuit board.
[0092] It is understood that, in addition to the bus component 121 and the sensing component, the signal transmission component 120 may also include other electrical components, and the two insulating layers 122 may also be used to encapsulate the other electrical components. The specific type of the electrical components is not limited in the embodiments of this application.
[0093] As an example, in this embodiment of the application, the signal transmission component 120 may be a cell connection system (CCS) to realize the signal transmission of the battery cell group 110.
[0094] See also Figure 6The cooling system 130 is a cooling plate. In the z direction, the size of the cooling system 130 can be equal to or similar to the gap between two adjacent battery cell rows 113. The large surface of the cooling system 130 can contact the battery cell 20 for cooling the battery cell 20.
[0095] In the y-direction, the size of the cooling system 130 can be smaller than the size of the battery cell 20, thus creating a gap between two adjacent rows of battery cells 113. The gap is provided with a sealing member 140 at the opening of the first surface 101 to block the condensate generated by the cooling system 130.
[0096] Combination Figure 5 and Figure 6 It can be seen that the gap between the two adjacent battery cell rows 113 extends along the x direction. Correspondingly, the sealing member 140 can be a strip-shaped sealing member, which extends along the x direction and its length can be close to or equal to the length of each battery cell row 113 in the x direction.
[0097] Figure 7 It shows Figure 6 A schematic enlarged view of the area (Area A) where the sealing component 140 is located.
[0098] like Figure 7 As shown, in this embodiment, the sealing member 140 is disposed outside the gap and closely attached to the first surface 101 of the battery cell assembly 110, with the aim of sealing the opening of the gap on the first surface 101.
[0099] Alternatively, in other implementations, Figure 8 and Figure 9 It shows Figure 6 Two other schematic enlarged views of the area (Area A) where the middle sealing component 140 is located.
[0100] like Figure 8 As shown, the sealing member 140 extends into the gap between two adjacent battery cell rows 113, improving the stability of the sealing member 140 in the gap and reducing the amount of air entering the gap, thereby reducing the possibility of condensation in the cooling system 130 and improving the sealing effect of the sealing member 140.
[0101] like Figure 9 As shown, the sealing member 140 extends into the gap between two adjacent battery cell rows 113 and is connected to the cooling system 130. In this technical solution, the entry of air between the sealing member 140 and the cooling system 130 can be greatly reduced or avoided, thereby better preventing the generation of condensate in the cooling system 130 and improving the sealing effect of the sealing member 140.
[0102] Optionally, in the above-mentioned embodiments, the sealing member 140 can be a liquid-absorbing material to absorb the condensate formed in the cooling system 130. Through this embodiment, even if a small amount of air comes into contact with the cooling system 130 and generates condensate, the sealing member 140 can absorb the condensate, preventing the condensate from moving in the battery 10 and reaching the busbar 121 or other components in the battery 10, thus preventing safety hazards.
[0103] Optionally, in the above-mentioned embodiments, the sealing member 140 may be elastic, which facilitates installation in the gap between two adjacent battery cell rows 113, and when the sealing member 140 located in the gap is in a compressed state, it has a certain force with the battery cell 20, which can improve the installation stability and sealing effect of the sealing member 140 at the gap.
[0104] In some possible implementations, the partial sealing member 140 located in the gap between two adjacent battery cell rows 113 is in a compressed state, while the partial sealing member 140 located outside the gap is in a non-compressible state.
[0105] In some other possible implementations, the sealing element 140 is entirely in a compressed state. For example, such as... Figures 7 to 9 As shown, the sealing element 140 is compressed between the insulating layer 122 in the signal transmission assembly 120 and the first surface 101 of the battery cell group 110.
[0106] In this embodiment, in addition to being compressed and disposed in the gap between two adjacent battery cell rows 113, the sealing member 140 is also compressed and disposed between the insulating layer 122 and the first surface 101 of the battery cell group 110. Therefore, the installation stability and sealing effect of the sealing member 140 can be further improved.
[0107] It is understood that, in the embodiments of this application, the sealing member 140 can be compressed not only between the insulating layer 122 in the signal transmission component 120 and the first surface 101 of the battery cell group 110, but also between other components and the first surface 101 of the battery cell group 110. The embodiments of this application do not specifically limit this.
[0108] Optionally, in the above-described embodiments, the material of the sealing component 140 includes, but is not limited to, foam, which may have liquid absorption capacity and / or elasticity, and is low in cost, and can be well applied in the battery 10 provided in this application.
[0109] In the above embodiments, the sealing component 140 can be an independent component installed in the gap between two adjacent battery cell rows 113. In other embodiments, the sealing component 140 can also be formed by reusing the original components in the battery 10, without the need to set up additional components for sealing, which can reduce manufacturing costs.
[0110] Figure 10 shows Figure 6 Another schematic partial enlarged view of the area (Area A) where the plugging member 140 is located in
[0111] As Figure 10 shown, in the embodiment of the present application, the insulating layer 122 in the signal transmission component 120 protrudes towards the first surface 101 of the battery cell group 110 to form the plugging member 140. Specifically, the insulating layer 122 protrudes towards the opening in the first surface 101 to form the plugging member 140, and the opening is the opening in the first surface 101 of the gap between two adjacent battery cell columns 113.
[0112] Combined with Figure 6 and Figure 10 it can be seen that in the embodiment of the present application, in the two insulating layers 122 of the signal transmission component 120, a local area in the insulating layer 122 close to the first surface 101 protrudes to form a fold, and the protruding fold is used to form the plugging member 140 of the embodiment of the present application.
[0113] Optionally, in some embodiments, the cross-section of the plugging member 140 in a plane perpendicular to the second direction approximately presents an Ω shape. For example, as Figure 10 shown, the plane perpendicular to the second direction (i.e., the x direction) is the yz plane, and in the yz plane, the cross-section of the plugging member 140 approximately presents an Ω shape.
[0114] Alternatively, in other embodiments, the cross-section of the plugging member 140 in a plane perpendicular to the second direction may also present other shapes, such as a "square" shape, a "convex" shape or any other arbitrary shape, and the embodiments of the present application do not make specific limitations thereto.
[0115] Optionally, as Figure 10 shown, the plugging member 140 can extend into the gap between two adjacent battery cell columns, and the plugging member 140 can be closely attached to the wall of the battery cell in the gap to ensure the plugging effect of the plugging member 140.
[0116] Alternatively, in other embodiments, the plugging member 140 may not extend into the gap between two adjacent battery cell columns 113, but only be disposed at the opening. At this time, the size of the plugging member 140 needs to be greater than the width of the gap to achieve a better plugging effect.
[0117] The above Figure 10 only schematically shows the cross-sectional view of the plugging member 140 in the yz plane. To more clearly show the three-dimensional shape of the plugging member 140, Figure 11 shows Figure 10 a partial three-dimensional schematic diagram of the plugging member 140 in the embodiment shown. As Figure 11As shown, the pleats formed by the protrusion of the insulating layer 122 in the signal transmission assembly 120 extend along the x-direction to form a strip-shaped sealing element 140. In other words, in this embodiment, the sealing element 140 formed by the protrusion of the local remote layer 122 extends along the x-direction to seal the openings corresponding to the gaps between the battery cell rows 113 extending along the x-direction.
[0118] One embodiment of this application also provides an electrical device that may include the battery 10 from the foregoing embodiments, the battery 10 being used to provide electrical energy to the electrical device. Optionally, the electrical device may be a vehicle 1, a ship, or a spacecraft.
[0119] The battery 10 and the electrical device of the present application embodiments have been described above. The method and apparatus for preparing the battery of the present application embodiments will be described below. For parts not described in detail, please refer to the foregoing embodiments.
[0120] Figure 12 A schematic flowchart of a method 300 for preparing a battery according to an embodiment of this application is shown. Figure 12 As shown, the method 300 may include:
[0121] 310 provides battery cell packs 110.
[0122] The battery cell group 110 includes N battery cell columns 113, which are arranged along a first direction. The battery cells 20 in each of the N battery cell columns 113 are arranged along a second direction, with the first direction perpendicular to the second direction. N is an integer greater than 1.
[0123] 320, provides signal transmission component 120.
[0124] The signal transmission component 120 is disposed on the first surface 101 of the battery cell group 110. The first surface 101 is parallel to the plane defined by the first direction and the second direction. The signal transmission component 120 includes 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 with the battery cell 20 in the battery cell group 110 at the opening 123.
[0125] 330, providing a cooling system 130.
[0126] The cooling system 130 is disposed between two adjacent battery cell rows 110 in the N battery cell rows 110. A sealing member 140 is provided in the opening of the first surface 101 to block the gap between the two adjacent battery cell rows 110. The sealing member 140 is used to block the opening to prevent the condensate generated by the cooling system 130 from reaching the manifold 121.
[0127] Figure 13 A schematic block diagram of a battery manufacturing apparatus 400 according to one embodiment of this application is shown. Figure 13 As shown, the battery manufacturing apparatus 400 may include a providing module 410 and an installation module 420.
[0128] The providing module 410 is used to: provide a battery cell group 110, wherein the battery cell group 110 includes N battery cell columns 113, the N battery cell columns are arranged along a first direction, and the battery cells 20 of each battery cell column 113 in the N battery cell columns 113 are arranged along a second direction, the first direction is perpendicular to the second direction, and N is an integer greater than 1.
[0129] The module 410 is further configured to: provide a signal transmission component 120, wherein the signal transmission component 120 is disposed on a first surface 101 of the battery cell group 110, the first surface 101 being parallel to a plane defined by a first direction and a second direction, the signal transmission component 120 including a busbar 121 and an insulating layer 122, the insulating layer 122 being used to encapsulate the busbar 121, the insulating layer 122 having an opening 123, the busbar 121 being used to electrically connect with a battery cell 20 in the battery cell group 110 at the opening 123.
[0130] The module 410 is also configured to: provide a cooling system 130, wherein the cooling system 130 is disposed between two adjacent battery cell rows 110 in the N battery cell rows 110, and a sealing member 140 is provided in the opening of the first surface 101 for the gap between the two adjacent battery cell rows 110, the sealing member 140 being used to seal the opening to prevent the condensate generated by the cooling system 130 from reaching the manifold 121.
[0131] 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 group (110) includes N battery cell columns (113), the N battery cell columns (113) are arranged along a first direction, and the battery cells (20) of each battery cell column (113) are arranged along a second direction, the first direction being perpendicular to the second direction, and N being an integer greater than 1; A signal transmission component (120) is disposed on a first surface (101) of the battery cell group (110), the first surface (101) being parallel to a plane defined by the first direction and the second direction. The signal transmission component (120) includes a busbar (121) and an insulating layer (122). The insulating layer (122) is used to encapsulate the busbar (121). The insulating layer (122) has an opening (123). The busbar (121) is used to electrically connect with a battery cell (20) in the battery cell group (110) at the opening (123). A cooling system (130) is disposed between two adjacent battery cell rows (113) in the N battery cell rows (113), the cooling system (130) including a cooling plate for containing a cooling medium; Wherein, a sealing member (140) is provided in the opening of the gap between two adjacent battery cell rows (113) facing the first surface (101). The sealing member (140) is used to block the opening to prevent the condensate generated by the cooling system (130) from reaching the manifold (121). The sealing member (140) is spaced apart from the cooling plate. The first direction is perpendicular to the horizontal plane and perpendicular to the surface of the cooling plate opposite to the battery cell row (113).
2. The battery according to claim 1, characterized in that, The sealing element (140) extends into the gap.
3. The battery according to claim 2, characterized in that, The sealing element (140) is connected to the cooling system (130) within the gap.
4. The battery according to any one of claims 1 to 3, characterized in that, The sealing component (140) is made of a liquid-absorbing material.
5. The battery according to claim 1, characterized in that, The sealing element (140) is elastic and is compressed between the insulating layer (122) and the first surface (101).
6. The battery according to any one of claims 1 to 3, characterized in that, The insulating layer (122) protrudes toward the opening to form the sealing element (140).
7. The battery according to claim 1, characterized in that, The sealing element (140) has a convex or Ω-shaped cross section on a plane perpendicular to the second direction.
8. The battery according to claim 1, characterized in that, The sealing element (140) is a strip-shaped sealing element that extends along the second direction.
9. An electrical appliance, characterized in that, include: The battery according to any one of claims 1 to 8 is used to provide electrical energy.
10. A method for preparing a battery, characterized in that, include: A battery cell group (110) is provided, the battery cell group (110) comprising N battery cell columns (113), the N battery cell columns (113) being arranged along a first direction, and the battery cells (20) of each battery cell column (113) being arranged along a second direction, the first direction being perpendicular to the second direction, where N is an integer greater than 1; A signal transmission component (120) is provided, the signal transmission component (120) being disposed on a first surface (101) of the battery cell group (110), the first surface (101) being parallel to a plane defined by a first direction and a second direction, the signal transmission component (120) including a busbar (121) and an insulating layer (122), the insulating layer (122) being used to encapsulate the busbar (121), the insulating layer (122) having an opening (123), the busbar (121) being used to electrically connect with a battery cell (20) in the battery cell group (110) at the opening (123); A cooling system (130) is provided, the cooling system (130) being disposed between two adjacent battery cell rows (113) in the N battery cell rows (113), the cooling system (130) including a cooling plate for containing a cooling medium; Wherein, a sealing member (140) is provided in the opening of the gap between two adjacent battery cell rows (113) facing the first surface (101). The sealing member (140) is used to block the opening to prevent the condensate generated by the cooling system (130) from reaching the manifold (121). The sealing member (140) is spaced apart from the cooling plate. The first direction is perpendicular to the horizontal plane and perpendicular to the surface of the cooling plate opposite to the battery cell row (113).
11. An apparatus for manufacturing batteries, characterized in that, include: Provide module (410) for: A battery cell group (110) is provided, the battery cell group (110) comprising N battery cell columns (113), the N battery cell columns (113) being arranged along a first direction, and the battery cells (20) of each battery cell column (113) being arranged along a second direction, the first direction being perpendicular to the second direction, where N is an integer greater than 1; A signal transmission component (120) is provided, the signal transmission component (120) being disposed on a first surface (101) of the battery cell group (110), the first surface (101) being parallel to a plane defined by a first direction and a second direction, the signal transmission component (120) including a busbar (121) and an insulating layer (122), the insulating layer (122) being used to encapsulate the busbar (121), the insulating layer (122) having an opening (123), the busbar (121) being used to electrically connect with a battery cell (20) in the battery cell group (110) at the opening (123); A cooling system (130) is provided, the cooling system (130) being disposed between two adjacent battery cell rows (113) in the N battery cell rows (113), the cooling system (130) including a cooling plate for containing a cooling medium; Wherein, a sealing member (140) is provided in the opening of the gap between two adjacent battery cell rows (113) facing the first surface (101). The sealing member (140) is used to block the opening to prevent the condensate generated by the cooling system (130) from reaching the manifold (121). The sealing member (140) is spaced apart from the cooling plate. The first direction is perpendicular to the horizontal plane and perpendicular to the surface of the cooling plate opposite to the battery cell row (113).