Multifunctional prismatic battery cell housing

Abstract

A prismatic battery cell having a battery cell housing including an inner housing including a first sidewall and a second sidewall spaced apart from the first sidewall, an upper wall coupled to the first sidewall and the second sidewall, a lower wall coupled to the first sidewall and the second sidewall, and an inner side and an outer side opposite the inner side. The prismatic battery cell also includes an outer shell coupled to an outer side of the inner shell, one or more cavities between the inner shell and the outer shell, and one or more cooling channels disposed in the one or more cavities and coupled to the outer side of the inner shell. The one or more cavities include at least one first fluid conduit on a first side of the cooling channel and at least one second fluid conduit on a second side of the cooling channel.

Description

[0001] introduction

[0002] The information provided in this section is for the purpose of presenting the general context of this disclosure. The work of the currently named inventors, to the extent described in this section, and in aspects that may not qualify as prior art at the time of filing, is neither expressly nor implicitly acknowledged as prior art to this disclosure. Technical Field

[0003] This disclosure generally relates to battery packs for electric vehicles, and more specifically, to a multifunctional prismatic battery cell. Background Technology

[0004] Typically, rechargeable energy storage systems (RESS) generally include one or more battery cells with insulating sheaths, elastic materials between the one or more battery cells, thermal interface materials, and / or cooling interfaces. Therefore, these systems can occupy a significant amount of space within a vehicle. Furthermore, assembling and packaging these systems can be complex due to the number of components required to encapsulate them in the vehicle and the large space required. One or more aspects of this disclosure address the disadvantages of existing systems. Summary of the Invention

[0005] In one configuration, a prismatic battery with a battery cell housing is provided, the prismatic battery cell including an inner shell comprising a first sidewall and a second sidewall spaced apart from the first sidewall, an upper wall connected to the first and second sidewalls, a lower wall connected to the first and second sidewalls, and an inner side and an outer side opposite to the inner side. The prismatic battery cell also includes an outer shell connected to the outer side of the inner shell, one or more cavities between the inner shell and the outer shell, and one or more cooling channels disposed in the one or more cavities and connected to the outer side of the inner shell. The one or more cavities include at least one first fluid conduit on a first side of the cooling channel and at least one second fluid conduit on a second side of the cooling channel.

[0006] A prismatic battery cell may include one or more of the following optional aspects. For example, a prismatic battery may also include one or more electrodes and an electrolyte disposed within an inner casing.

[0007] In at least one aspect, the inner shell may also include a liner attached to the inside. The liner may be made of a fluoropolymer material.

[0008] In at least another aspect, the inner casing may also include a first closure attached to a wall at a first end of the battery cell housing and a second closure attached to a wall at a second end of the battery cell housing.

[0009] In at least one instance, the inner shell may be made of a material composed of aluminum alloy or steel.

[0010] In at least another instance, at least a portion of the outer side of the inner shell includes a mechanically ground, roughened, textured, or chemically modified surface.

[0011] In at least one aspect, one or more cooling channels may be configured to be curved in a direction perpendicular to the first sidewall and the second sidewall.

[0012] In at least one other aspect, a first fluid conduit is configured for a first fluid, and a second fluid conduit is configured for a second fluid different from the first fluid.

[0013] In at least one instance, the shell may be a composite material.

[0014] In at least another example, the housing may also include one or more terminals.

[0015] According to at least one aspect, the enclosure may also include one or more vents.

[0016] The prismatic battery cell may further include a first end cap connected to the upper wall and a second end cap connected to the lower wall. The prismatic battery cell may also include a third end cap connected to the front end and a fourth end cap connected to the rear end. The third end cap may include a fluid inlet and one or more fluid outlets, and the fourth end cap may include a fluid outlet and one or more fluid inlets.

[0017] In another configuration, a prismatic battery cell is provided, comprising an inner casing, an outer casing encapsulating the inner casing, one or more cavities disposed between the inner casing and the outer casing, and one or more cooling channels disposed in the one or more cavities and coupled to the inner casing. The one or more cooling channels may be configured to bend between the inner casing and the outer casing.

[0018] The prismatic battery cell may include one or more of the following optional aspects. For example, one or more cooling channels may define a first fluid conduit and a second fluid conduit within one or more cavities.

[0019] In another configuration, an electric vehicle is provided, comprising a body extending in a vehicle cross-direction, an electric motor, a battery pack connected to the electric motor, and one or more prismatic battery cells disposed within the battery pack. The one or more prismatic battery cells include an inner shell comprising a first sidewall and a second sidewall spaced apart from the first sidewall, an upper wall connected to the first and second sidewalls, a lower wall connected to the first and second sidewalls, and an inner side and an outer side opposite to the inner side. The prismatic battery cell also includes an outer shell connected to the outer side of the inner shell, one or more cavities between the inner shell and the outer shell, and one or more cooling channels disposed in the one or more cavities and connected to the outer side of the inner shell.

[0020] Electric vehicles may include one or more of the following optional aspects. For example, one or more prismatic battery cells extend approximately half the width of the vehicle relative to the transverse direction or approximately half the length of the vehicle relative to the longitudinal direction.

[0021] In at least one aspect, the one or more prismatic battery cells extend about the width of the vehicle relative to the transverse direction or about the length of the vehicle relative to the longitudinal direction. Attached Figure Description

[0022] The accompanying drawings described herein are for illustrative purposes only for the selected configurations and are not intended to limit the scope of this disclosure.

[0023] Figure 1 This is a schematic perspective view of an example of an electric vehicle with a battery pack based on the principles of this disclosure;

[0024] Figure 2 yes Figure 1 A schematic end view of an example battery pack, showing a prismatic battery cell with the closure and end cap removed;

[0025] Figure 3 It has a first end cap and a second end cap. Figure 2 A perspective view of one of the prismatic battery cells in the battery pack;

[0026] Figure 4 yes Figure 3 A cross-sectional view of a prismatic battery along line 4-4, the prismatic battery cell including an inner shell, one or more cooling channels and an outer shell, the first end cap and the second end cap are not shown;

[0027] Figure 5 yes Figure 3A cross-sectional view of another configuration of a prismatic battery cell, the prismatic battery cell including an inner shell, a liner along the inner side of the inner shell, one or more cooling channels, and an outer shell, with a first end cap and a second end cap not shown.

[0028] Figure 6 yes Figure 2 An end view of one of the prismatic battery cells in the battery pack, where the closure is shown attached to the inner casing and the end cap is removed;

[0029] Figure 7 yes Figure 3 A cross-sectional view of a prismatic battery cell shows a configuration of one or more cooling channels;

[0030] Figure 8 yes Figure 3 A cross-sectional view of a prismatic battery cell, showing another configuration of one or more cooling channels;

[0031] Figure 9 It is along Figure 3 Line 9-9 includes one or more terminals and one or more vents. Figure 3 A cross-sectional view of a prismatic battery cell;

[0032] Figure 10 This is a perspective view of a battery pack including prismatic battery cells, which are configured to extend approximately Figure 1 Half the width of the vehicle; and

[0033] Figure 11 This is a perspective view of a battery pack including prismatic battery cells configured to span... Figure 1 The approximate width of the vehicle.

[0034] In all the accompanying drawings, the corresponding reference numerals denote the corresponding parts. Detailed Implementation

[0035] The example configuration will now be described more fully with reference to the accompanying drawings. The example configuration is provided so that this disclosure will be thorough and will fully communicate the scope of this disclosure to those skilled in the art. Specific details, such as examples of specific components, apparatus, and methods, are set forth to provide a thorough understanding of the configuration of this disclosure. It will be apparent to those skilled in the art that specific details are not required, the example configuration may be embodied in many different forms, and the specific details and example configuration should not be construed as limiting the scope of this disclosure.

[0036] The terminology used herein is for the purpose of describing a particular exemplary configuration only and is not intended to be limiting. As used herein, the singular articles “a” and “the” may also be intended to include plural forms unless the context clearly indicates otherwise. The terms “comprising,” “including,” and “having” are inclusive and therefore specify the presence of features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0037] When an element or layer is referred to as “on another element or layer,” “joined to,” “connected to,” “attached to,” or “linked to” another element or layer, it may be directly on, joined to, connected to, attached to, or linked to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly linked to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” vs. “directly between,” “adjacent” vs. “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0038] The terms “first,” “second,” “third,” etc., may be used herein to describe various elements, components, regions, layers, and / or parts. These elements, components, regions, layers, and / or parts should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or part from another. Unless the context clearly indicates otherwise, terms such as “first,” “second,” and other numerical terms do not imply order or sequence. Therefore, without departing from the teachings of the example configuration, the first element, component, region, layer, or part discussed below may be referred to as the second element, component, region, layer, or part.

[0039] In this application, including the following definitions, the term "module" may be replaced by the term "circuit". The term "module" may refer to, be part of, or include the following: application-specific integrated circuit (ASIC); digital, analog, or mixed-signal analog / digital discrete circuit; digital, analog, or mixed-signal analog / digital integrated circuit; combinational logic circuit; field-programmable gate array (FPGA); processor (shared, dedicated, or grouped) that executes code; memory (shared, dedicated, or grouped) that stores code executed by the processor; other suitable hardware components that provide the described functionality; or combinations of some or all of the foregoing, such as in a system-on-a-chip.

[0040] The term "code" as used above can include software, firmware, and / or microcode, and can refer to programs, routines, functions, classes, and / or objects. The term "shared processor" includes a single processor that executes some or all of the code from multiple modules. The term "group processor" includes processors that, in combination with additional processors, execute some or all of the code from one or more modules. The term "shared memory" covers a single memory that stores some or all of the code from multiple modules. The term "group memory" includes memory that, in combination with additional memory, stores some or all of the code from one or more modules. The term "memory" can be a subset of the term "computer-readable medium." The term "computer-readable medium" does not include transient electrical and electromagnetic signals propagating through the medium and can therefore be considered tangible and non-transitory memory. Non-limiting examples of non-transitory memory include tangible computer-readable media, which include non-volatile memory, magnetic memory, and optical memory.

[0041] The apparatus and methods described in this application can be implemented, partially or entirely, by one or more computer programs executed by one or more processors. The computer program includes processor-executable instructions stored on at least one non-transitory tangible computer-readable medium. The computer program may also include and / or depend on stored data.

[0042] A software application (i.e., a software resource) can refer to computer software that enables a computing device to perform tasks. In some examples, a software application may be referred to as an "application," "app," or "program." Example applications include, but are not limited to, system diagnostic applications, system management applications, system maintenance applications, word processing applications, spreadsheet applications, messaging applications, media streaming applications, social networking applications, and game applications.

[0043] Non-transitory memory can be a physical device used to temporarily or permanently store programs (e.g., instruction sequences) or data (e.g., program state information) for use by a computing device. Non-transitory memory can be volatile and / or non-volatile addressable semiconductor memory. Examples of non-volatile memory include, but are not limited to, flash memory and read-only memory (ROM) / programmable read-only memory (PROM) / erasable programmable read-only memory (EPROM) / electrically erasable programmable read-only memory (EEPROM) (e.g., commonly used in firmware, such as boot programs). Examples of volatile memory include, but are not limited to, random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), phase-change memory (PCM), and magnetic disks or magnetic tapes.

[0044] These computer programs (also referred to as programs, software, software applications, or code) include machine instructions for a programmable processor and can be implemented using high-level procedural and / or object-oriented programming languages ​​and / or assembly / machine languages. As used herein, the terms “machine-readable medium” and “computer-readable medium” refer to any computer program product, non-transitory computer-readable medium, apparatus, and / or device (e.g., disk, optical disk, memory, programmable logic device (PLD)) used to provide machine instructions and / or data to a programmable processor, including machine-readable media that receive machine instructions as machine-readable signals. The term “machine-readable signal” refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0045] Various implementations of the systems and techniques described herein can be implemented in digital electronic and / or optical circuits, integrated circuits, specially designed ASICs (Application-Specific Integrated Circuits), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementations in one or more computer programs executable and / or interpretable on a programmable system, which includes at least one programmable processor, which may be dedicated or general-purpose, coupled to receive data and instructions from a storage system, at least one input device, and at least one output device, and to transmit data and instructions to the storage system, at least one input device, and at least one output device.

[0046] The processes and logical flows described in this specification can be executed by one or more programmable processors (also known as data processing hardware) that execute one or more computer programs to perform functions by manipulating input data and generating output. The processes and logical flows can also be executed by special-purpose logic circuitry (e.g., FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits). As an example, processors suitable for executing computer programs include both general-purpose and special-purpose microprocessors, as well as any one or more processors of any type of digital computer. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. The basic elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices (e.g., magnetic disks, magneto-optical disks, or optical disks) for storing data, or operatively coupled to receive data from or transfer data to, or both. However, a computer does not need to have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices such as EPROM, EEPROM, and flash memory devices; magnetic disks such as internal hard disks or removable disks; magneto-optical disks; and CD-ROMs and DVD-ROMs. Processors and memory may be supplemented by or incorporated into dedicated logic circuitry.

[0047] To provide interaction with a user, one or more aspects of this disclosure can be implemented on a computer having a display device (e.g., a CRT (cathode ray tube), LCD (liquid crystal display) monitor, or touchscreen) for displaying information to the user and optionally a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback, such as visual, auditory, or tactile feedback; and input from the user can be received in any form, including sound, speech, or tactile input. Additionally, the computer can interact with the user by sending documents to and receiving documents from the device used by the user; for example, by sending a webpage to a web browser on the user's client device in response to a request received from a web browser.

[0048] refer to Figure 1A vehicle 10, such as an electric vehicle, is provided. The vehicle 10 includes a body 12, one or more wheels 14, and an electric motor 16 disposed within the body 12. The body 12 extends along a first direction (i.e., a longitudinal or longitudinal direction) 18, a second direction (i.e., a lateral or sideways direction) 20, and a third direction (i.e., a vertical direction) 22. The electric motor 16 may be configured to drive one or more of the one or more wheels 14 to propel the vehicle 10. The vehicle 10 includes a battery pack 100, which may be disposed within the body 12 and communicatively connected to the electric motor 16 via a power cable 24.

[0049] refer to Figure 2 An example of a battery pack 100 is provided, and the battery pack 100 includes one or more battery cells or prismatic battery cells 102. Each prismatic battery cell 102 may include a battery cell housing 104. The battery cell housing 104 may include a sandwich structure having an inner shell 200, one or more cooling channels 300, and an outer shell 400. For example, the battery cell housing 104 may be made of one or more materials, such as composite materials, metallic materials, or other materials that can provide structural rigidity and facilitate elastic deformation during battery cell formation and charging cycles. Each battery cell housing 104 has a first or top sidewall 106 and a second or bottom sidewall 108, as shown in the image. Figure 2 As shown. Additionally, the battery cell housing 104 has a first end or front end 110 and a second end or rear end 112, as... Figure 3 As shown.

[0050] refer to Figure 4 The inner casing 200 may have a first sidewall 202, a second sidewall 204, an upper wall 206 connected to the first sidewall 202 and the second sidewall 204, and a lower wall 208 connected to the first sidewall 202 and the second sidewall 204. In the remainder of the specification, the first sidewall 202, the second sidewall 204, the upper wall 206, and the lower wall 208 may be collectively referred to as walls 202, 204, 206, and 208. The inner casing 200 has an inner side 210 and an opposite outer side 212. More specifically, each of walls 202, 204, 206, and 208 further defines the inner side 210 and the outer side 212. Walls 202, 204, 206, and 208 form a chamber 214, which may include internal components of the battery cell, such as electrodes 216 and electrolyte 218. (Reference) Figure 6Chamber 214 may be a fluid-sealed chamber, for example, sealed with one or more closures (i.e., plates) 220. Closures 220 may be attached to walls 202, 204, 206, 208 via adhesive, welding, brazing, or other joining techniques. Inner shell 200 may be constructed of metallic and / or thermally conductive materials to facilitate cooling. The material used for inner shell 200 may also be heat-resistant. Materials such as aluminum alloys or steel may be particularly desirable for promoting high thermal conductivity and / or preventing thermal runaway events. A portion or all of the outer surfaces 212 of walls 202, 204, 206, 208 may be modified to enhance heat transfer between inner shell 200 and outer shell 400. For example, the outer surfaces 212 of walls 202, 204, 206, 208 may be mechanically ground, roughened, and / or textured to increase surface area, and / or chemically modified to enhance interfacial bonding, at least where outer shell 400 contacts or joins inner shell 200 (discussed in more detail below). More specifically, the outer surface 212 can be modified using, for example, mechanical sanding, abrasion, roughening, texturing, plasma treatment, plasma deposition, laser ablation and / or other chemical surface treatments.

[0051] According to one aspect of this disclosure, the inner shell 200 may have a lining 222 along the inner side 210 of the walls 202, 204, 206, 208, such as a chemically inert fluoropolymer lining, as... Figure 5 As shown. Liner 222 may comprise one or more materials that are chemically resistant to electrolyte 218, such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), polyvinyl fluoride (PVF), or fluorinated ethylene propylene (FEP). According to at least one aspect of this disclosure, liner 222 may be injection molded along the inner side 210 of walls 202, 204, 206, 208.

[0052] Refer again Figure 4 One or more cooling channels 300 can be connected to the inner shell 200 to improve the efficiency of cooling the inner shell 200. The one or more cooling channels 300 can be made of a composite material or metal material with good thermal conductivity and elasticity, and can be defined by a generally arc-shaped wall. The arc-shaped wall can extend from a first end contacting one of walls 202, 204 to a second end contacting one of walls 202, 204. An approximate midpoint of the arc-shaped wall can contact the outer shell 400 between the first and second ends, such as... Figure 4As shown. The metallic material used for one or more cooling channels 300 may include, for example, 3xxx aluminum alloys, other aluminum alloys, or steel. The composite material used for one or more cooling channels 300 may include a composite material that provides strength and stiffness in a direction perpendicular to the length of the battery cell housing 104 (i.e., the dimension between the first sidewall 106 and the second sidewall 108 of the battery cell). In other words, the cooling channel 300 may be configured to absorb deformation in a direction perpendicular to the first sidewall 106 and the second sidewall 108. Additionally or alternatively, the composite material may include a material that provides elastic properties in a direction perpendicular to the first sidewall 202 and the second sidewall 204. The composite material may include a material having fiber-reinforced or liquid crystal aromatic polyester-aryl (LCP) fibrils oriented along the length of the battery cell housing 104. For LCP, this can be achieved using processing conditions where the viscosity of the matrix melt is at least twice the viscosity of the LCP melt under the given processing conditions. The composite material may include a material that provides thermal conductivity but is electrically insulating, such as a material filled with alumina, boron nitride, or a thermal conductivity grade (e.g., The material, and has a strength of not more than 3.0 × 10⁻⁶ at 65°C. -3 m 2 kW -1 The thermal resistance across the wall.

[0053] Reference Figure 7 and Figure 8 The cooling channel 300 may include one or more different paths. For example, the cooling channel 300 may include one or more linear cooling paths 302, such as... Figure 7 As shown. Alternatively, the cooling channel 300 can follow a serpentine cooling path 304, as... Figure 8 As shown. According to one aspect of this disclosure, a method of manufacturing the cooling channel 300 includes using water-soluble sand or sacrificial fibers (e.g., nylon monofilaments) treated with a release agent.

[0054] Refer again Figure 4 The housing 400 may include a first half 402 and a second half 404. The first half 402 and the second half 404 may be coupled to or formed into the inner housing 200. The first half 402 and the second half 404 each include an inner wall 406 and an outer wall 408. The housing 400 may serve as an electrical and / or thermal barrier to isolate the prismatic battery cell 102 from other components of the battery pack 100. The housing 400 may be made of an electrically and thermally resistant composite material for insulation. Additional layers and / or coatings may be applied to the housing 400 to improve its thermal resistance and electrical resistance, enhance its ability to withstand thermal events, and prevent arcing. The housing 400 may include, for example, a polymer matrix and fiber reinforcement. Additionally, the housing 400 may include one or more terminals 410 and / or one or more vents 412, such as… Figure 9 As shown.

[0055] According to one aspect, the polymer matrix includes thermoplastic polymers such as thermoplastic polyimide (Pl), polyphenylene sulfide (PPS), polyetherimide (PEI), polyethersulfone (PES), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyaryletherketone (PAEK), or polyethylene terephthalate (PET). Furthermore, the fiber reinforcement material can be glass fiber or liquid crystal polymer (LCP). LCPs can include various thermotropic liquid crystal polymers, such as Vectra B950 or Xydar SRT-900. Thermoplastic LCP materials can include various thermotropic liquid crystal polymers, such as any polymer having a backbone consisting of repeating units of linked aromatic rings or having linking organic groups capable of forming a liquid crystal phase, including commercially available [polymers / materials]. grade, Level and Grade. The polymer matrix comprises thermosetting polymers, such as phenolic resins, thermosetting polyimides, phenethyl-terminated imides (PETI), epoxy resins, and polyurethanes. In these configurations, the fiber reinforcement material can be glass fiber.

[0056] The housing 400 may be composed of more than one material. For example, the outer wall 408 of the housing 400 may include a thermoplastic composite material that provides a thermal barrier and / or fire barrier. Some of these materials may meet UL 2596: Test Method for Thermal and Mechanical Performance of Battery Enclosure Materials, including PPS rating. 6150T73 and PP grades (Stamax™ 30YH570). Additionally or alternatively, the outer wall 408 may be made of a material with a polymer matrix, such as aluminum hydroxide, magnesium hydroxide, various hydrates, ammonium phosphate, melamine cyanurate, potassium carbonate, kaolin, hydrated silica, titanium dioxide, clay, calcium silicate, alumina, zirconium oxide, and gypsum. The outer wall 408 of the housing 400 may be treated or finished such that one or more prismatic battery cells 102 may be stacked or arranged adjacent to the first half 402 and / or the second half 404.

[0057] The inner wall 406 of the housing 400 may include a composite material that provides thermal conductivity but electrical insulation, such as being filled with alumina, boron nitride, or a thermally conductive grade (e.g., The composite material has a density of no more than 3.0 × 10⁻⁶ at 65°C. -3 m 2 kW -1 The thermal resistance across the wall.

[0058] Manufacturing the housing 400 may include protrusion, extrusion, or blow molding processes. Additionally or alternatively, the housing 400 may be injection molded or overmolded to enclose the inner housing 200 and the cooling channel 300. According to one aspect, the housing 400 is overmolded onto the inner housing 200, wherein the cooling channel 300 is brazed to the inner housing 200. According to another aspect, the housing 400 and the cooling channel 300 are extruded (i.e., plastic-metal hybrid extrusion).

[0059] During assembly, one or more cavities 500 are formed between the inner shell 200 and the outer shell 400. One or more cooling channels 300 are arranged in the one or more cavities 500 and define one or more first fluid conduits 502 between the outer shell 400 and a first side 306 of the cooling channel 300 and one or more second fluid conduits 504 between the inner shell 200 and a second side 308 of the cooling channel 300. The one or more first fluid conduits 502 may be configured for a first fluid (e.g., air), and the one or more second fluid conduits 504 may be configured for a second fluid (e.g., coolant). In other words, the second fluid may be different from the first fluid. The elasticity of the prismatic battery cell 102, and more specifically, the elasticity of the cooling channels 300, can be adjusted by the first and second fluids and / or by selecting the material of the cooling channels 300 (e.g., composite materials, metals, etc.). For example, adjusting the elasticity of the cooling channels 300 is desirable to account for compression during battery assembly and expansion during battery charging.

[0060] The arrangement of the inner casing 200, one or more cooling channels 300, and the outer casing 400 provides a rigid or semi-rigid structure that can be reliably transported during manufacturing. In other words, the prismatic battery cell 102 may include a large cross-sectional area with a complex geometry, which can provide high structural rigidity.

[0061] refer to Figure 9 The prismatic battery cell 102 may include a first or top end cap 602 coupled to a first sidewall 106 and a second or bottom end cap 604 coupled to a second sidewall 108. The top end cap 602 and bottom end cap 604 may provide structural rigidity, add clearance for terminals 410 and / or vents 412 of the housing 400, and / or serve as cooling channels for additional cooling along the first sidewall 106 and the second sidewall 108. The top end cap 602 and bottom end cap 604 may be integrated into the inner housing 200 and the outer housing 400, or they may be separate components.

[0062] refer to Figure 7 and8 The prismatic battery cell 102 may include a third or front end cap 606 coupled to a first end 110 and a fourth or rear end cap 608 coupled to a second end 112. The third end cap 606 and the fourth end cap 608 may be configured such that fluid can be supplied to the cooling channel 300 and flow from the first end 110 to the second end 112 of the prismatic battery cell 102. For example, the third end cap 606 may have a fluid inlet 610 and one or more fluid outlets 612. The fourth end cap 608 may have one or more fluid inlets 614 and fluid outlets 616. According to at least one aspect, the closure 220 for securing the chamber 214 may be an integral part of the third end cap 606 and the fourth end cap 608. For example, such an arrangement may be desirable for improving the manufacturability of the prismatic battery cell 102.

[0063] refer to Figure 10 and 11 The battery pack 100 may include one or more prismatic battery cells 102 extending along the lateral direction 20 of the vehicle 10. For example, the battery pack 100 may include one or more prismatic battery cells 102 that extend approximately half the width 114 of the vehicle 10 relative to the lateral direction 20. In another variation, the battery pack 100 may include one or more prismatic battery cells 102 that extend about the entire width 116 of the vehicle 10 relative to the lateral direction 20. In yet another configuration, the battery pack 100 may include one or more prismatic battery cells 102 that extend about half or about the entire length of the vehicle 10 relative to the longitudinal direction 18.

[0064] Many embodiments have been described. However, it should be understood that various modifications can be made without departing from the spirit and scope of this disclosure. Therefore, other embodiments are within the scope of the appended claims.

[0065] The foregoing description is provided for illustrative and descriptive purposes. It is not intended to be exhaustive or limiting of this disclosure. Elements or features of a particular configuration are generally not limited to that particular configuration, but are interchangeable where applicable and can be used in selected configurations, even if not specifically shown or described. They can also be varied in many ways. Such variations should not be considered as departing from this disclosure, and all such modifications are intended to be included within the scope of this disclosure.

Claims

1. A prismatic battery cell with a battery cell housing, comprising: Inner shell, the inner shell comprising: A first sidewall and a second sidewall spaced apart from the first sidewall, The upper wall, which is connected to the first side wall and the second side wall, The lower wall, which is connected to the first side wall and the second side wall, and The inner side and the outer side opposite to the inner side; An outer casing, which is attached to the outer side of the inner casing; One or more cavities, the one or more cavities being located between the inner shell and the outer shell, and One or more cooling channels, said one or more cooling channels being arranged in said one or more cavities and connected to said outer side of said inner shell; and The one or more cavities include at least one first fluid pipe on the first side of the cooling channel and at least one second fluid pipe on the second side of the cooling channel.

2. The prismatic battery cell of claim 1, wherein the inner casing further includes a lining connected to the inner side.

3. The prismatic battery cell according to claim 1, wherein, The inner shell also includes a first closure member connected to the wall at a first end of the battery cell housing and a second closure member connected to the wall at a second end of the battery cell housing.

4. The prismatic battery cell according to claim 1, wherein the inner shell is made of a material composed of aluminum alloy or steel.

5. The prismatic battery cell of claim 1, wherein at least a portion of the outer side of the inner casing comprises a mechanically ground, roughened, textured, or chemically modified surface.

6. The prismatic battery cell of claim 1, wherein the one or more cooling channels are configured to be curved in a direction perpendicular to the first sidewall and the second sidewall.

7. The prismatic battery cell according to claim 1, wherein, The first fluid conduit is configured for a first fluid, and the second fluid conduit is configured for a second fluid different from the first fluid.

8. The prism-shaped battery cell according to claim 1 further includes a first end cap connected to the upper wall and a second end cap connected to the lower wall.

9. The prism-shaped battery cell housing according to claim 8 further includes a third end cap connected to the front end and a fourth end cap connected to the rear end.

10. The prismatic battery cell housing according to claim 9, wherein, The third end cap includes a fluid inlet and one or more fluid outlets, and the fourth end cap includes a fluid outlet and one or more fluid inlets.

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