Output pole base, battery device and electric equipment
By adding an abutment member with a large thermal expansion coefficient to the output pole support, the overlap gap problem between the output pole connecting piece and the bar piece is solved, thereby improving the reliability of the battery device.
Patent Information
- Application Number
- CN202521447671.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-11
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2035-07-11
AI Technical Summary
In the prior art, there is often an overlap gap between the output electrode connecting piece and the tab, resulting in a large contact resistance and affecting the reliability of the battery device.
An abutment is added to the output pole support, and a dissimilar material is used. The thermal expansion coefficient of the abutment is greater than that of the output pole support. Under high temperature conditions, the deformation of the abutment is greater than that of the support, driving the output pole connecting piece to move toward the bar piece, and clamping it through the fixing piece to reduce the overlap gap.
The overlap gap between the output pole connecting piece and the bar piece is effectively reduced, thereby improving the reliability of the battery device.
Smart Images
Figure CN223401820U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to an output pole base, a battery device and an electrical device. Background Art
[0002] A battery device usually includes a battery pack and an end plate assembly. The end plate assembly usually includes an end plate, an output pole base, a bar and an output pole connecting plate. The end battery cell pole of the battery pack is connected to the output pole connecting plate through the bar, and the output pole connecting plate is connected to the output pole base. The output pole base is installed on the end plate, thereby transmitting the electrical signal in the battery device to the outside of the battery device through the output pole connecting plate and the output pole base.
[0003] In related technologies, in order to ensure the connection reliability between the output pole connecting piece and the bar piece, bolts are usually used to connect the output pole connecting piece and the bar piece to the output pole base. However, there is easily an overlap gap between the output pole connecting piece and the bar piece, resulting in poor reliability caused by large contact resistance. Utility Model Content
[0004] In view of the above problems, the present application provides an output pole base, a battery device and an electrical equipment, aiming to improve the problem of poor reliability caused by large contact resistance due to overlap gap.
[0005] The present application provides a battery device, including an output pole base, a bar, an output pole connecting piece and a fixing piece, wherein the fixing piece is passed through the bar and the output pole connecting piece and is connected to the output pole base; the output pole base includes an output pole support and an abutment piece; the abutment piece is provided on the output pole support, and the side of the abutment piece away from the output pole support is configured to sequentially install the output pole connecting piece and the bar, and is configured to abut the output pole connecting piece to drive the output pole connecting piece to move toward the bar; wherein the abutment piece and the output pole support are made of dissimilar materials, and the thermal expansion coefficient of the abutment piece is greater than the thermal expansion coefficient of the output pole support.
[0006] In the technical solution of the embodiment of the present application, an abutment is added to the output pole support. During assembly, the output pole connecting piece and the bar piece are sequentially installed on the side of the abutment away from the output pole support. A fixing piece is used to pass through the bar piece, the output pole connecting piece, and the abutment and connected to the output pole support so that the abutment abuts against the output pole connecting piece. Since the abutment and the output pole support are made of dissimilar materials and the thermal expansion coefficient of the abutment is greater than the thermal expansion coefficient of the output pole support, in the event of high contact resistance, the deformation of the abutment will be greater than the deformation of the output pole support. Under the thermal expansion deformation of the abutment, the abutment expands outward to drive the output pole connecting piece toward the bar piece. Thus, by clamping the output pole connecting piece and the bar piece by the abutment and the fixing piece, the overlap gap between the output pole connecting piece and the bar piece can be reduced, thereby effectively improving the problem of poor reliability caused by large contact resistance due to the overlap gap, thereby improving the reliability of the battery device.
[0007] In some embodiments, a buffer groove is provided on the side of the abutment member near the output pole support. This design allows the fixing member to pass through the tab, the output pole connecting piece, and the abutment member and be connected to the output pole support. The buffer groove design can increase the buffer space of the fixing member during the locking process, thereby further reducing the overlap gap between the output pole connecting piece and the tab.
[0008] In some embodiments, the abutting member includes an abutting section; at least two connecting sections are connected to the output pole support at intervals; the abutting section is connected between the at least two connecting sections and protrudes in a direction away from the output pole support so that the abutting section and the at least two connecting sections enclose a buffer groove, and the abutting section is configured to abut the output pole connecting piece. Such a design, by designing the abutting member into at least two connecting sections and the abutting section, can achieve connection with the output pole support through the at least two connecting sections, thereby improving the connection reliability between the abutting member and the output pole support; at the same time, by protruding in a direction away from the output pole support so that the abutting section and the at least two connecting sections enclose a buffer groove, a relatively simple structure can be used to form the required buffer groove, thereby achieving a simplified structural design.
[0009] In some embodiments, the abutment is a metal member. This design, because metal materials have a higher thermal expansion coefficient than other materials, allows the abutment to undergo greater deformation in the event of contact resistance and high temperatures. This allows the abutment to expand outward under thermal expansion to better drive the output pole connecting piece toward the bar piece, thereby better clamping the output pole connecting piece and the bar piece.
[0010] In some embodiments, the abutment member is a metal spring. This design allows the metal spring to deform more effectively under high temperature conditions, resulting in a greater deformation. Therefore, when contact resistance is generated and high temperatures occur, the abutment member can be deformed more effectively. Under the thermal expansion deformation of the abutment member, the abutment member can expand outward to better drive the output pole connecting piece toward the bar piece, thereby better clamping the output pole connecting piece and the bar piece.
[0011] In some embodiments, the output pole base further includes a connector, and the abutting member is connected to the output pole support via the connector. This design, by using the connector to connect the abutting member to the output pole support, can facilitate the connection between the abutting member and the output pole support, while also improving the reliability of the connection between the abutting member and the output pole support.
[0012] In some embodiments, the output pole support is a plastic part. This design, because plastic materials have a lower thermal expansion coefficient than other materials and are less expensive, allows the output pole support to deform less than the abutment when high temperatures due to contact resistance heat are encountered. This allows the support to expand outward under the thermal expansion deformation of the abutment to better drive the output pole connecting piece toward the bar piece, thereby better clamping the output pole connecting piece and the bar piece.
[0013] In some embodiments, the battery device further comprises an end plate, the end plate being provided with a snap-fitting slot, and the output pole support being at least partially snap-fitted into the snap-fitting slot. With this design, during assembly, the abutment member can be connected to the output pole support to form the output pole base, and then the output pole support of the output pole base can be directly snap-fitted into the snap-fitting slot of the end plate, thereby enabling quick assembly and disassembly of the output pole base.
[0014] The present application also provides an output pole base, including an output pole support and an abutment member; the abutment member is arranged on the output pole support, and the side of the abutment member away from the output pole support is configured to install the output pole connecting piece and the bar piece in sequence, and is configured to abut the output pole connecting piece to drive the output pole connecting piece to move toward the bar piece; wherein, the abutment member and the output pole support are made of dissimilar materials, and the thermal expansion coefficient of the abutment member is greater than the thermal expansion coefficient of the output pole support.
[0015] The present application also provides an electrical device comprising the above-mentioned battery device.
[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0018] Figure 1 This is a structural diagram of an embodiment of a vehicle of the present application;
[0019] Figure 2 An exploded view of an embodiment of a battery device of the present application;
[0020] Figure 3 This is a schematic structural diagram of another embodiment of the battery device of the present application;
[0021] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;
[0022] Figure 5 This is a partial structural diagram of another embodiment of the battery device of the present application;
[0023] Figure 6 This is an exploded view of a portion of the structure of another embodiment of the battery device of the present application;
[0024] Figure 7 A partial structural cross-sectional view of another embodiment of the battery device of the present application;
[0025] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;
[0026] Figure 9 This is a structural diagram of the output pole base in another embodiment of the battery device of the present application.
[0027] Description of Figure Numbers:
[0028]
[0029] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0030] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.
[0032] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.
[0033] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0034] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).
[0035] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0036] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0037] Battery devices, also referred to in this field as batteries, can be categorized as either disposable or rechargeable depending on whether they are rechargeable. Common rechargeable battery types include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are widely used in pure electric and hybrid vehicles. While these batteries have a relatively low capacity, they offer high output, high charging current, and a long service life, albeit at a relatively high cost.
[0038] The batteries described in the embodiments of this application are rechargeable batteries. The following description of the embodiments disclosed herein primarily uses lithium-ion batteries as an example. It should be understood that the embodiments disclosed herein are applicable to any other appropriate type of rechargeable battery. The batteries described in the embodiments disclosed herein can be directly or indirectly used in appropriate devices to power such devices.
[0039] The battery mentioned in the embodiments disclosed in this application refers to a single physical module that includes one or more battery cells to provide a predetermined voltage and capacity. Battery cells are the basic units in a battery and can generally be divided into cylindrical battery cells, rectangular battery cells, and soft-pack battery cells according to the packaging method. The following will mainly focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells in some aspects.
[0040] A battery cell consists of a positive electrode sheet, a negative electrode sheet, an electrolyte, and a separator. Lithium-ion battery cells primarily rely on the movement of lithium ions between the positive and negative electrode sheets. In cylindrical battery cells, a three-layer film structure is wound into a cylindrical electrode assembly, while in rectangular battery cells, the film structure is wound or stacked into a roughly rectangular electrode assembly.
[0041] In a typical battery cell structure, the battery cell includes a casing, an electrode assembly, and an electrolyte. The electrode assembly is housed in the battery cell casing and includes a positive electrode sheet, a negative electrode sheet, and a separator. The casing includes a housing and end caps. The housing includes a receiving cavity formed by multiple walls and an opening. The end caps are arranged at the opening to seal the receiving cavity. In addition to the electrode assembly, the receiving cavity also contains electrolyte. The positive and negative electrode sheets in the electrode assembly include tabs. To prevent high current from flowing through and causing melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The tabs are electrically connected to electrode terminals located outside the battery cell via connecting members. The electrode terminals generally include positive and negative electrode terminals. For rectangular battery cells, the electrode terminals are generally located on the end caps. Multiple battery cells are connected in series and / or in parallel via the electrode terminals for various applications.
[0042] In high-power applications such as electric vehicles, batteries are used at three levels: cells, modules, and batteries. A battery module is a system of electrically connected cells housed in a frame to protect the cells from external shock, heat, and vibration. A battery is the final battery system installed in an electric vehicle. It typically consists of a battery case that encloses one or more cells.
[0043] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and crucial role. Batteries consist of a battery housing and multiple cells contained within it. As core components in new energy vehicles, batteries have high operational reliability requirements. Currently, the reliability of power batteries during use is a common concern among consumers.
[0044] The battery provided in the embodiments of the present application can be a power source for electrical devices. Electrical devices can include mobile phones, portable devices, laptop computers, battery-powered vehicles, electric vehicles, ships, spacecraft, electric toys, and electric tools. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.
[0045] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.
[0046] For example, Figure 1This is a schematic diagram of the structure of an embodiment of a vehicle 1000 of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 100, a controller 200 and a motor 300 can be set inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 can be set at the bottom or front or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000, for example, for the working power requirements of the vehicle 1000 during startup, navigation and operation. In another embodiment of the present application, the battery device 100 can not only be used as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
[0047] For example, see Figure 2 , Figure 2 This is an exploded view of an embodiment of a battery device 100 of the present application. The battery device 100 includes a battery case 10 and a battery cell 20. The battery case 10 has a storage space for accommodating the battery cell 20. The battery case 10 can adopt a variety of structures. In some embodiments, the battery case 10 may include a first part 10a and a second part 10b. The first part 10a and the second part 10b cover each other, and the first part 10a and the second part 10b jointly define a storage space for accommodating the battery cell 20. The second part 10b can be a hollow structure with one end open, and the first part 10a can be a plate-like structure. The first part 10a covers the open side of the second part 10b, so that the first part 10a and the second part 10b jointly define a storage space; the first part 10a and the second part 10b can also be hollow structures with one side open, and the open side of the first part 10a covers the open side of the second part 10b. Of course, the battery box 11 formed by the first part 10a and the second part 10b can be in various shapes, such as a cylinder, a cuboid, etc.
[0048] In the battery device 100, there can be one or more battery cells 20. When the battery device 100 has multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit formed by the multiple battery cells 20 is housed within the battery housing 10. Of course, the battery device 100 can also be formed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection to form a battery module, and then the multiple battery modules are further connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within the battery housing 10.
[0049] A battery device usually includes a battery pack and an end plate assembly. The end plate assembly usually includes an end plate, an output pole base, a bar and an output pole connecting plate. The end battery cell pole of the battery pack is connected to the output pole connecting plate through the bar, and the output pole connecting plate is connected to the output pole base. The output pole base is installed on the end plate, thereby transmitting the electrical signal in the battery device to the outside of the battery device through the output pole connecting plate and the output pole base.
[0050] In related technologies, in order to ensure the connection reliability between the output pole connecting piece and the bar piece, bolts are usually used to connect the output pole connecting piece and the bar piece to the output pole base. However, there is easily an overlap gap between the output pole connecting piece and the bar piece, resulting in poor reliability caused by large contact resistance.
[0051] Based on the above problems, the present application proposes a battery device 100, which aims to improve the problem of poor reliability caused by large contact resistance due to the overlap gap.
[0052] See also Figures 3 to 9 In one embodiment of the present application, the battery device 100 includes an output pole base 40, a bar piece 50, an output pole connecting piece 60 and a fixing member 70, the fixing member 70 is passed through the bar piece 50 and the output pole connecting piece 60, and is connected to the output pole base 40; the output pole base 40 includes an output pole support 41 and an abutment 42; the abutment 42 is provided on the output pole support 41, and the side of the abutment 42 away from the output pole support 41 is configured to sequentially install the output pole connecting piece 60 and the bar piece 50, and is configured to abut the output pole connecting piece 60 to drive the output pole connecting piece 60 to move toward the bar piece 50; wherein, the abutment 42 and the output pole support 41 are made of dissimilar materials, and the thermal expansion coefficient of the abutment 42 is greater than the thermal expansion coefficient of the output pole support 41.
[0053] The battery device 100 also includes a battery pack and an end plate 30. The battery pack includes multiple battery cells 20. The end plate 30 is arranged at the end of the battery pack. The output pole base 40 is installed on the end plate 30. The poles of the battery cells 20 at the end of the battery pack are connected to the output pole connecting piece 60.
[0054] The battery pack is composed of multiple battery cells 20 connected in series, parallel, or mixed. An end plate 30 can be provided at one end of the battery pack, or at both opposite ends of the battery pack, to secure the multiple battery cells 20 of the battery pack. In the embodiment where end plates 30 are provided at both opposite ends of the battery pack, an output pole base 40 is mounted on each end plate 30. The poles of the battery cells 20 at both ends of the battery pack are respectively connected to two output pole connecting plates 60. Each output pole connecting plate 60 is connected to equipment outside the battery device 100 via a bar 50.
[0055] The output terminal connecting piece 60 is a conductive connection structure used to connect the terminal column of the end battery cell 20 of the battery pack. The tab 50 is a conductive connector 43 used to connect the output terminal conductive piece and the external device. The output terminal connecting piece 60 and the tab 50 are connected to the external device through the output terminal connecting piece 60 and the tab 50, thereby providing power to the external device. The output terminal connecting piece 60 can be made of a conductive material such as copper, aluminum, or silver. The tab 50 can be made of a conductive material such as copper tab 50 or aluminum tab 50.
[0056] The output pole base 40 is used to connect and secure the output pole connecting piece 60 and the bar piece 50. The output pole base 40 is mounted on the end plate 30 via the output pole support 41. The output pole support 41 can be connected to the end plate 30 by means of a clamping connection, a bolt connection, a rivet connection, etc. The output pole support 41 can be made of plastic, metal, or other materials, as long as the thermal expansion coefficient of the output pole support 41 is less than the thermal expansion coefficient of the abutment 42.
[0057] The fixing member 70 is used to pass through the tab 50, the output pole connecting piece 60, and the abutment member 42, and is connected to the output pole support 41. Through the cooperation of the fixing member 70 and the output pole base 40, the tab 50 and the output pole connecting piece 60 can be installed on the output pole base 40. The fixing member 70 can be a bolt, a rivet, or other connecting structural member. For example, the fixing member 70 may include a rod 71 and a head 72, the bar 50 is provided with a first through hole 51, the output pole connecting piece 60 is provided with a second through hole 61, the abutment 42 is provided with a third through hole 4221, and the output pole support 41 is provided with a fixing hole 411. The first through hole 51, the second through hole 61, the third through hole 4221 and the fixing hole 411 are coaxially arranged and connected to each other, wherein the rod 71 of the fixing member 70 is used to pass through the first through hole 51 of the bar 50, the second through hole 61 of the output pole connecting piece 60, and the third through hole 4221 of the abutment 42 in sequence, and be inserted into the fixing hole 411 of the output pole support 41, and locked on the fixing hole 411 of the output pole support 41, and at the same time, the head 72 of the fixing member 70 is covered on the side of the bar 50 away from the output pole connecting piece 60.
[0058] The abutment 42 is used to undergo significant deformation in the event of high contact resistance heat, so that it expands outward under the thermal expansion deformation of the abutment 42 to drive the output pole connecting piece 60 toward the bar piece 50. By clamping the output pole connecting piece 60 and the bar piece 50 by the abutment 42 and the fixing member 70, the overlap gap between the output pole connecting piece 60 and the bar piece 50 can be reduced. The abutment 42 can be connected to the output pole support 41 by rivet connection, bolt connection, clamping, etc. to improve the connection reliability between the abutment 42 and the output pole support 41. The abutment 42 can be a metal part, or a plastic part or other material part, as long as the abutment 42 and the output pole base 40 are made of dissimilar materials and the thermal expansion coefficient of the abutment 42 is greater than the thermal expansion coefficient of the output pole support 41.
[0059] It should be noted that since the abutment 42 and the output pole support 41 are made of dissimilar materials and have different thermal expansion coefficients, there may be an effect of different lengths of dissimilar materials connected at the same temperature, that is, under the same heating conditions, the two can produce different amounts of deformation, which not only makes the connection between the two tighter, but also makes the abutment 42 with a larger deformation expand outward to drive the output pole connecting piece 60 to move toward the bar piece 50, so that the output pole connecting piece 60 and the bar piece 50 are clamped by the abutment 42 and the fixing member 70, and the overlap gap between the output pole connecting piece 60 and the bar piece 50 can be reduced. In some embodiments, the output pole support 41, the abutment 42, the output pole connecting piece 60 and the bar piece 50 can be arranged along the vertical direction (Z direction), so when the abutment 42 expands outward to drive the output pole connecting piece 60 to move toward the bar piece 50, the output pole connecting piece 60 and the bar piece 50 are clamped by the abutment 42 and the fixing member 70, so that the Z direction overlap gap between the output pole connecting piece 60 and the bar piece 50 can be reduced.
[0060] In summary, in the technical solution of the embodiment of the present application, by adding an abutment 42 to the output pole support 41, during assembly, the output pole base 40 is installed on the end plate 30, and then the output pole connecting piece 60 and the bar piece 50 are installed in sequence on the side of the abutment 42 away from the output pole support 41, and the fixing piece 70 is used to pass through the bar piece 50, the output pole connecting piece 60 and the abutment 42, and connected to the output pole support 41, so that the abutment 42 abuts against the output pole connecting piece 60. Since the abutment 42 and the output pole support 41 are made of different materials, and the thermal expansion coefficient of the abutment 42 is greater than the thermal expansion coefficient of the output pole support 41, when the contact resistance is high and the temperature is high, the deformation of the abutment 42 will be greater than the deformation of the output pole support 41. Under the thermal expansion deformation of the abutment 42, it expands outward to drive the output pole connecting piece 60 to move toward the bar piece 50, so that the output pole connecting piece 60 and the bar piece 50 are clamped by the abutment 42 and the fixing part 70, and the overlap gap between the output pole connecting piece 60 and the bar piece 50 can be reduced, thereby effectively improving the problem of poor reliability caused by the large contact resistance due to the overlap gap, thereby improving the reliability of the battery device 100.
[0061] See also Figure 6 、 Figure 8 、 Figure 9 In one embodiment of the present application, a buffer groove 40 a is provided on one side of the abutting member 42 close to the output pole support 41 .
[0062] With such a design, when the fixing member 70 is passed through the bar 50, the output pole connecting piece 60 and the abutment 42 and connected to the output pole support 41, the design of the buffer groove 40a can increase the buffer space of the fixing member 70 during the locking process, thereby further reducing the overlap gap between the output pole connecting piece 60 and the bar 50.
[0063] See also Figure 6 、 Figure 9 In one embodiment of the present application, the abutment member 42 includes at least two connecting sections 421 and an abutment section 422; the at least two connecting sections 421 are connected to the output pole support 41 at intervals; the abutment section 422 is connected between the at least two connecting sections 421 and protrudes in a direction away from the output pole support 41, so that the abutment section 422 and the at least two connecting sections 421 enclose a buffer groove 40a, and the abutment section 422 is configured to abut the output pole connecting piece 60.
[0064] The connecting section 421 is used to connect to the output pole support 41 to fix the abutment 42 as a whole to the output pole support 41. At least two connecting sections 421 can be spaced apart along the width direction of the output pole support 41, that is, spaced apart along the width direction of the end plate 30, with the width direction of the end plate 30 being arranged at an angle to the arrangement direction of the multiple battery cells 20. The abutment section 422 is connected between at least two connecting sections 421 and is used to abut the output pole connecting piece 60. The abutment section 422 and the at least two connecting sections 421 can form a "F" shape. The abutment section 422 and the connecting section 421 can be an integrally formed structure, or a structure connected by bonding, bolting, or other methods.
[0065] Such a design, by designing the abutment 42 into at least two connecting sections 421 and an abutment section 422, can realize connection with the output pole support 41 through at least two connecting sections 421, so as to improve the connection reliability between the abutment 42 and the output pole support 41; at the same time, by protruding the abutment section 422 in a direction away from the output pole support 41, so that the abutment section 422 and at least two connecting sections 421 are enclosed to form a buffer groove 40a, a relatively simple structure can be used to form the required buffer groove 40a, thereby realizing a simplified structural design.
[0066] See also Figures 4 to 6 In one embodiment of the present application, the abutment member 42 is a metal member.
[0067] The metal member refers to a structural member made of a metal material to form the abutment member 42 of the desired shape and size. The abutment member 42 can be made of a metal material with a relatively high thermal expansion coefficient. The specific thermal expansion coefficient is not limited to a specific value, as long as the thermal expansion coefficient of the abutment member 42 is greater than the thermal expansion coefficient of the output pole support 41. For example, the abutment member can be made of metal materials such as aluminum, chromium-nickel stainless steel, potassium, zinc, and lead.
[0068] In such a design, since the thermal expansion coefficient of metal materials is higher than that of other materials, a metal part is used as the abutment part 42. In the case of high temperature due to contact resistance heat, the abutment part 42 can undergo a larger deformation, and can expand outward under the thermal expansion deformation of the abutment part 42 to better drive the output pole connecting piece 60 toward the bar piece 50, and can better clamp the output pole connecting piece 60 and the bar piece 50.
[0069] See also Figures 4 to 6 In one embodiment of the present application, the abutment member 42 is a metal spring.
[0070] A metal dome is a structural component that can undergo significant deformation under high temperatures due to contact resistance heating and gradually recover its original shape as it returns to normal temperature. The thickness and width of the metal dome can be designed based on its normal elastic properties when tightened. For example, the thickness can range from 1mm to 3mm, specifically 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, and so on.
[0071] Such a design uses a metal spring as the abutment 42 because the metal spring can deform better under high temperature conditions to produce a larger deformation. In the case of high temperature due to contact resistance heat, the abutment 42 can be deformed to a greater extent, and can expand outward under the thermal expansion deformation of the abutment 42 to better drive the output pole connecting piece 60 toward the bar piece 50, and can better clamp the output pole connecting piece 60 and the bar piece 50.
[0072] See also Figure 6 、 Figure 8 、 Figure 9 In one embodiment of the present application, the output pole base 40 further includes a connecting member 43 , and the abutting member 42 is connected to the output pole support 41 through the connecting member 43 .
[0073] The connector 43 is a connecting structural member used to connect the abutment member 42 to the output pole support 41. The connector 43 can specifically be a connecting structural member such as a heat rivet or a screw, as long as it can fix the abutment member 42 to the output pole support 41. The number of connectors 43 used can be set according to the actual connection reliability requirements. For example, one, two, three, four, five, or other multiple connectors 43 can be used to connect the abutment member 42 to the output pole support 41.
[0074] Such a design can facilitate the connection between the abutting member 42 and the output pole support 41 by connecting the abutting member 42 to the output pole support 41 through the connecting member 43 , and can also improve the connection reliability between the abutting member 42 and the output pole support 41 .
[0075] See also Figures 4 to 9 In one embodiment of the present application, the output pole support 41 is a plastic part.
[0076] The plastic component refers to a structural component made of a plastic material to form the output pole support 41 of the desired shape and size. The output pole support 41 can be made of a plastic material with a low thermal expansion coefficient. The specific thermal expansion coefficient is not limited to a specific value, as long as the thermal expansion coefficient of the abutment member 42 is greater than the thermal expansion coefficient of the output pole support 41. For example, the output pole support 41 can be made of plastic materials such as engineering plastics, glass fiber, and carbon fiber board.
[0077] Such a design uses a plastic part as the output pole support 41 because the thermal expansion coefficient of the plastic material is lower than that of other materials and the material cost is lower. In the case of high temperature due to contact resistance heat, the deformation of the output pole support 41 can be made smaller than the deformation of the abutment 42. It can expand outward under the thermal expansion deformation of the abutment 42 to better drive the output pole connecting piece 60 toward the bar piece 50, and can better clamp the output pole connecting piece 60 and the bar piece 50.
[0078] See also Figure 6 In one embodiment of the present application, the battery device 100 further includes an end plate 30 , the end plate 30 is provided with a snap-in slot 31 , and the output pole support 41 is at least partially snap-into the snap-in slot 31 .
[0079] With such a design, during the assembly process, the abutment 42 can be connected to the output pole support 41 to form the output pole base 40, and then the output pole support 41 of the output pole base 40 can be directly clamped in the clamping groove 31 of the end plate 30, so that the output pole base 40 can be installed on the end plate 30, thereby realizing quick disassembly and assembly of the output pole base 40.
[0080] In some embodiments, the snap-in slot 31 can pass through from the side of the end plate 30 close to the battery pack to the side away from the battery pack. During the assembly process, the output pole support 41 can be more smoothly snapped into the snap-in slot 31 of the end plate 30 from the side of the end plate 30 away from the battery pack.
[0081] See also Figures 3 to 9 The present application also proposes an output pole base 40, which includes an output pole support 41 and abutment 42; the abutment 42 is arranged on the output pole support 41, and the side of the abutment 42 away from the output pole support 41 is configured to sequentially install the output pole connecting piece 60 and the bar piece 50, and is configured to abut the output pole connecting piece 60 to drive the output pole connecting piece 60 to move toward the bar piece 50; wherein, the abutment 42 and the output pole support 41 are made of dissimilar materials, and the thermal expansion coefficient of the abutment 42 is greater than the thermal expansion coefficient of the output pole support 41.
[0082] According to some embodiments of the present application, a battery device 100 including an output pole base 40 is provided. Figures 3 to 9The battery device 100 also includes a battery pack, an end plate 30, a tab 50, an output pole connecting piece 60, and a fixing member 70. The battery pack includes multiple battery cells 20. The end plate 30 is provided at the end of the battery pack. The output pole base 40 is mounted on the end plate 30. The poles of the battery cells 20 at the end of the battery pack are connected to the output pole connecting piece 60. The fixing member 70 is passed through the tab 50 and the output pole connecting piece 60 and is connected to the output pole base 40. The abutment 42 is a metal spring, and the output pole support 41 is a plastic part. A buffer groove 40a is provided on the side of the abutment 42 close to the output pole support 41. The abutment 42 is connected to the output pole support 41 through a connecting member 43.
[0083] In the technical solution of the embodiment of the present application, the technical solution of the present application forms the output pole base 40 by adding an abutment 42 to the output pole support 41 and connecting the abutment 42 to the output pole support 41 using a connector 43. During assembly, the output pole base 40 is mounted on the end plate 30, and then the output pole connecting piece 60 and the bar piece 50 are sequentially mounted on the side of the abutment 42 away from the output pole support 41. A fixing piece 70 is used to pass through the bar piece 50, the output pole connecting piece 60 and the abutment 42 and connected to the output pole support 41 so that the abutment 42 abuts against the output pole connecting piece 60. Since the abutment 42 and the output pole support 41 are made of different materials, and the thermal expansion coefficient of the abutment 42 is greater than the thermal expansion coefficient of the output pole support 41, when the contact resistance is high and the temperature is high, the deformation of the abutment 42 will be greater than the deformation of the output pole support 41. Under the thermal expansion deformation of the abutment 42, it expands outward to drive the output pole connecting piece 60 to move toward the bar piece 50, so that the output pole connecting piece 60 and the bar piece 50 are clamped by the abutment 42 and the fixing member 70, and the overlap gap between the output pole connecting piece 60 and the bar piece 50 can be reduced, thereby effectively improving the problem of poor reliability caused by the large contact resistance due to the overlap gap, thereby improving the reliability of the battery device 100. Furthermore, by using a metal spring as the abutment 42 and a plastic component as the output pole support 41, the abutment 42 can undergo greater deformation in the event of high contact resistance heat. Under thermal expansion and deformation, the abutment 42 can expand outward to better drive the output pole connecting piece 60 toward the bar 50, thereby better clamping the output pole connecting piece 60 and the bar 50. Furthermore, when the fixing member 70 is passed through the bar 50, the output pole connecting piece 60, and the abutment 42 and connected to the output pole support 41, the design of the buffer groove 40a can increase the buffer space of the fixing member 70 during the locking process, thereby further reducing the overlap gap between the output pole connecting piece 60 and the bar 50.
[0084] The present application also proposes an electrical device, which includes a battery device 100. The specific structure of the battery device 100 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0085] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.
Claims
1. A battery device, characterized in that: It includes an output pole base, a bar, an output pole connecting piece and a fixing piece, wherein the fixing piece is passed through the bar and the output pole connecting piece and is connected to the output pole base; The output pole base comprises: Output pole support; an abutment member provided on the output pole support, wherein a side of the abutment member away from the output pole support is configured to sequentially mount the output pole connecting piece and the bar piece, and is configured to abut the output pole connecting piece to drive the output pole connecting piece to move toward the bar piece; Wherein, the abutting member and the output pole support are made of different materials, and the thermal expansion coefficient of the abutting member is greater than the thermal expansion coefficient of the output pole support.
2. The battery device according to claim 1, wherein: A buffer groove is provided on one side of the abutment member close to the output pole support.
3. The battery device according to claim 2, wherein: The abutment member comprises: At least two connecting segments, connected to the output pole support at intervals; The abutting section is connected between at least two of the connecting sections and protrudes in a direction away from the output pole support so that the abutting section and at least two of the connecting sections enclose the buffer groove, and the abutting section is configured to abut the output pole connecting piece.
4. The battery device according to any one of claims 1 to 3, characterized in that The abutment member is a metal member.
5. The battery device according to claim 4, wherein: The abutting member is a metal spring.
6. The battery device according to any one of claims 1 to 3, characterized in that The output pole base further includes a connecting piece, and the abutting piece is connected to the output pole support via the connecting piece.
7. The battery device according to any one of claims 1 to 3, characterized in that The output pole support is a plastic part.
8. The battery device according to any one of claims 1 to 3, characterized in that The battery device further comprises an end plate, the end plate is provided with a clamping groove, and the output pole support is at least partially clamped in the clamping groove.
9. An output pole base, characterized in that: include: Output pole support; an abutment member provided on the output pole support, wherein a side of the abutment member away from the output pole support is configured to sequentially mount an output pole connecting piece and a bar piece, and is configured to abut the output pole connecting piece to drive the output pole connecting piece to move toward the bar piece; Wherein, the abutting member and the output pole support are made of different materials, and the thermal expansion coefficient of the abutting member is greater than the thermal expansion coefficient of the output pole support.
10. An electrical device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 8.