Busbar assembly, battery device and electric equipment

Abstract

The utility model discloses a busbar assembly, a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a busbar assembly, a circuit board and a plurality of battery cells, the circuit board is connected with the plurality of battery cells, and the busbar assembly comprises a plurality of busbars and a temperature sensor; the plurality of busbars are configured to be connected with the circuit board and the plurality of battery cells, and at least one busbar is provided with a connecting hole; the temperature sensor comprises a shell and a temperature sensing element arranged in the shell, and the temperature sensing element is configured to collect the temperature of the battery cell; the shell is provided with a connecting bulge, the outer side of the connecting bulge is provided with a buckling part, the connecting bulge is arranged in the connecting hole in a penetrating manner, and the buckling part is buckled on the busbar; and a deformation space is formed between the buckling part and the connecting bulge. According to the technical scheme provided by the utility model, the problem that a plastic bracket needs to be additionally arranged to fix the temperature sensor is solved, so that the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a busbar assembly, a battery device and electrical equipment. Background Art

[0002] At present, the power battery, as one of the main energy sources, is mostly a battery device composed of lithium cells in mainstream new energy vehicles. The physical and chemical properties of lithium cells determine that they cannot have a high tolerance for ambient temperature and their own operating temperature like ordinary lead-acid batteries; when the temperature is higher than a certain threshold, the lithium cells will undergo irreversible performance deterioration, and in extreme cases, it will even cause thermal runaway of the cells; once the cells have thermal runaway, it is easy to form an uncontrollable thermal runaway chain reaction, and eventually cause fires, explosions and other serious threats to the personal and property safety of consumers. Therefore, one of the important tasks of the battery management system on new energy vehicles is to intervene in time when the battery is overheated to prevent it from happening. In order to detect the overheating of the battery in time, it is necessary to set temperature sensors in key areas of the battery device to reflect the temperature conditions of the corresponding areas in real time through temperature sensors.

[0003] In the related art, the temperature sensor is first fixed on a plastic bracket, and then the thermosensitive electronics are fixed between the two poles of the battery cell through the plastic bracket, which requires an additional plastic bracket, resulting in high costs. Utility Model Content

[0004] In view of the above problems, the present application provides a bus assembly, a battery device and an electrical device, aiming to solve the problem of needing to add an additional plastic bracket to fix the temperature sensor, so as to reduce the cost.

[0005] The present application provides a battery device, which includes a bus assembly, a circuit board and multiple battery cells, the circuit board connects the multiple battery cells, the bus assembly includes multiple bus bars and a temperature sensor; the multiple bus bars are configured to connect the circuit board and the multiple battery cells, and at least one bus bar is provided with a connecting hole; the temperature sensor includes a shell and a temperature sensing element arranged in the shell, and the temperature sensing element is configured to collect the temperature of the battery cells; the shell is provided with a connecting protrusion, the outer side of the connecting protrusion is provided with a buckling part, the connecting protrusion is penetrated through the connecting hole, and the buckling part is buckled to the bus; a deformation space is formed between the buckling part and the connecting protrusion.

[0006] In the technical solution of the embodiment of the present application, the technical solution of the utility model directly provides a connecting protrusion on the shell of the temperature sensor, so that the connecting protrusion is inserted into the connecting hole of the bus, and the temperature sensor can be fixed on the bus by passing the connecting hole with a buckle part, thereby eliminating the need for an additional plastic bracket to fix the temperature sensor, reducing the cost; at the same time, the fixing effect of the temperature sensor can be effectively improved under the action of the buckle part, reducing the risk of falling off, and achieving an anti-falling effect. In addition, when the buckle part passes through the connecting hole, the design of the deformation space can provide space for the buckle part to deform, making it easier for the buckle part to deform and pass through the connecting hole smoothly, which can reduce the pressure on the temperature sensor, making installation more convenient, and at the same time reducing the risk of fracturing due to excessive pressure.

[0007] In some embodiments, the opening of the deformation space faces the busbar. With such a design, the buckle part can be deformed more easily and pass through the connection hole smoothly when passing through the connection hole, and the buckle part can quickly recover its deformation and buckle on the busbar after passing through the connection hole.

[0008] In some embodiments, one end of the buckle portion is connected to the connection protrusion, and the other end extends in a direction away from the connection protrusion and is inclined toward the bus. Such a design can make the buckle portion take the shape of an airplane wing, making it easier for the buckle portion to deform and pass through the connection hole smoothly, and at the same time, the buckle portion can recover its deformation more quickly after passing through the connection hole and buckle on the bus.

[0009] In some embodiments, the thickness of the buckle portion gradually decreases in the direction from close to the connection protrusion to far away from the connection protrusion. Such a design can make the thickness of the buckle portion at the position where it connects with the connection protrusion larger, and make the thickness of the end of the buckle portion away from the connection protrusion smaller, so that when the buckle portion is deformed by passing through the connection hole, the connection strength between the buckle portion and the connection protrusion can be strengthened to avoid the connection between the buckle portion and the connection protrusion from breaking, and at the same time, the buckle portion can be deformed more easily and pass through the connection hole smoothly.

[0010] In some embodiments, buckle parts are provided on opposite sides of the connecting protrusion. Such a design can be buckled on the busbar through the buckle parts on both sides of the connecting protrusion, which can further improve the fixing effect of the temperature sensor and further reduce the risk of falling off.

[0011] In some embodiments, the circuit board includes a first circuit board and a second circuit board; the first circuit board connects multiple battery cells and multiple bus bars; the temperature sensing element is connected to the first circuit board through the second circuit board. In such a design, after the temperature sensing element collects the temperature of the battery cell, it can be transmitted to the first circuit board through the second circuit board, so that the first circuit board can intervene in time when the battery cell overheats, thereby avoiding thermal runaway of the battery cell.

[0012] In some embodiments, the second circuit board is pluggable in the housing. With this design, when the temperature sensor is damaged, the second circuit board can be pulled out of the housing of the temperature sensor, and the buckle and the connection protrusion can be removed from the connection hole of the bus bar, so that the temperature sensor can be removed separately, thereby facilitating maintenance or replacement of the temperature sensor without scrapping the entire battery device, thereby achieving the purpose of cost saving.

[0013] In some embodiments, the shell includes a bottom shell and an upper cover; the bottom shell is provided with a connecting protrusion; the upper cover is provided on the bottom shell, and is enclosed with the bottom shell to form an inner cavity and an insertion port connected to the inner cavity, the temperature sensing element is installed in the inner cavity, and at least part of the second circuit board is inserted into the inner cavity from the insertion port to connect with the temperature sensing element. With such a design, when installing the temperature sensor, the upper cover can be opened first, and then the temperature sensing element can be installed in the bottom shell, and then the upper cover can be closed, so as to facilitate the installation of the temperature sensing element; in addition, when the temperature sensor needs to be installed on the second circuit board, at least part of the second circuit board can be directly inserted into the inner cavity from the insertion port to achieve the connection between the second circuit board and the temperature sensing element; and when the temperature sensor needs to be removed, the second circuit board can be directly unplugged from the insertion port of the temperature sensor, so as to achieve quick plug-in and disassembly between the second circuit board and the temperature sensor.

[0014] In some embodiments, the second circuit board is provided with a positive electrode gold finger and a negative electrode gold finger, the temperature sensing element is provided with a positive electrode conductor and a negative electrode conductor, the positive electrode gold finger is connected to the positive electrode conductor, and the negative electrode gold finger is connected to the negative electrode conductor. With such a design, when the second circuit board is inserted into the housing of the temperature sensor, the positive electrode gold finger and the negative electrode gold finger on the second circuit board can be connected to the positive electrode conductor and the negative electrode conductor on the temperature sensing element respectively, thereby achieving electrical conduction between the second circuit board and the temperature sensing element.

[0015] In some embodiments, positive gold fingers and negative gold fingers are provided on opposite sides of the second circuit board; the positive conductor includes a first positive spring clip and a second positive spring clip arranged oppositely, the first positive spring clip and the second positive spring clip sandwich the second circuit board, and are respectively connected to the two positive gold fingers; the negative conductor includes a first negative spring clip and a second negative spring clip arranged oppositely, the first negative spring clip and the second negative spring clip sandwich the second circuit board, and are respectively connected to the two negative gold fingers. Such a design can improve the connection reliability between the positive gold finger and the positive conductor, and can also improve the connection reliability between the negative gold finger and the negative conductor, avoiding the risk of instantaneous disconnection during vibration.

[0016] In some embodiments, the second circuit board is further provided with a fixing hole, and the upper cover is provided with a fixing column, and the fixing column is passed through the fixing hole. With such a design, during the installation process, the upper cover can be opened first, and then the second circuit board can be inserted into the inner cavity from the plug interface to connect with the temperature sensing element in the inner cavity, and then the upper cover can be closed. At this time, the fixing column on the upper cover is passed through the fixing hole of the second circuit board, so that the temperature sensor can be fixed under the cooperation of the fixing column and the fixing hole, so as to reduce the risk of the temperature sensor falling off from the second circuit board.

[0017] In some embodiments, the second circuit board is further provided with a separation groove, the separation groove is located between the positive gold finger and the negative gold finger, and the upper cover is further provided with an insulating bar, the insulating bar is inserted into the separation groove. With such a design, after the second circuit board is inserted into the inner cavity of the shell, when the upper cover is closed, the insulating bar on the upper cover will be inserted into the separation groove of the second circuit board, so as to separate the positive gold finger and the negative gold finger through the insulating bar, which can prevent foreign matter from falling between the positive gold finger and the negative gold finger and causing a short circuit.

[0018] In some embodiments, a thermal pad is provided between the temperature sensing element and the battery cell, and the temperature of the battery cell is transferred to the temperature sensing element through the thermal pad. In this design, the temperature of the battery cell can be transferred to the temperature sensing element through the thermal pad, so that the temperature of the battery cell can be accurately collected by the temperature sensing element, thereby improving the accuracy of the temperature collected by the temperature sensing element.

[0019] In some embodiments, the temperature sensing element is a thermistor. Such a design, using a thermistor as a temperature sensing element, can reflect the temperature status of the corresponding area of ​​the battery cell in real time through the change of the thermistor resistance value, and has the advantages of high sensitivity, small size, small thermal inertia, fast response speed, and ability to withstand large impact and vibration.

[0020] The present application also provides a bus assembly, including multiple bus bars and a temperature sensor; the multiple bus bars are configured to connect a circuit board and multiple battery cells, and at least one bus bar is provided with a connecting hole; the temperature sensor includes a shell and a temperature sensing element arranged in the shell, and the temperature sensing element is configured to collect the temperature of the battery cell; the shell is provided with a connecting protrusion, and the outer side of the connecting protrusion is provided with a snap-on portion, the connecting protrusion is passed through the connecting hole, and the snap-on portion is snap-on to the bus; a deformation space is formed between the snap-on portion and the connecting protrusion.

[0021] The present application also provides an electrical device, comprising the battery device as described above.

[0022] 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 in order 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

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A cross-sectional view of an embodiment of a busbar assembly of the present application;

[0025] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0026] Figure 3 This is a schematic diagram of the structure of a temperature sensor in an embodiment of a busbar assembly of the present application;

[0027] Figure 4 This is a schematic structural diagram of an embodiment of a battery device of the present application;

[0028] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0029] Figure 6 A cross-sectional view of an embodiment of a battery device of the present application;

[0030] Figure 7 A partial structural schematic diagram of an embodiment of a battery device of the present application;

[0031] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0032] Fig. 9 for Figure 7 The middle part of the structure is exploded;

[0033] Fig.10 This is an exploded view of the cooperation between the temperature sensor and the second circuit board in one embodiment of the battery device of the present application;

[0034] Fig.11 This is a structural schematic diagram of an embodiment of the battery device of the present application when the second circuit board is inserted into the temperature sensor;

[0035] Fig.12 This is a structural schematic diagram of an embodiment of the battery device of the present application when the second circuit board is pulled out from the temperature sensor;

[0036] Fig.13 This is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0037] Description of Figure Numbers:

[0038]

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] 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).

[0045] 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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 referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] The battery device mentioned in this field is also called a battery. It can be divided into disposable batteries and rechargeable batteries according to whether it is rechargeable. The common types of rechargeable batteries are: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output and charging current, and also have a longer service life, but the cost is higher.

[0048] The battery described in the embodiments of the present application refers to a rechargeable battery. The embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0049] The battery mentioned in the embodiments disclosed in this application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. The battery cell is the basic unit in the 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 the 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.

[0050] The battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. Lithium-ion batteries mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. In cylindrical batteries, the film structure of three layers of materials is wound into a cylindrical electrode assembly, while in rectangular batteries, the film structure is wound or stacked into an electrode assembly with a roughly rectangular shape.

[0051] In a common cell structure, the cell includes a shell, an electrode assembly and an electrolyte. The electrode assembly is contained in the cell shell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The shell includes a shell and an end cap. The shell includes a housing formed by a plurality of walls and an opening. The end cap is arranged at the opening to close the housing. In addition to the electrode assembly, the housing cavity also contains an electrolyte. The positive electrode sheet and the negative electrode sheet in the electrode assembly include tabs. In order to avoid passing a large current without melting, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. The tabs are electrically connected to the electrode terminals located outside the cell through connecting members, and the electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a rectangular cell, the electrode terminal is generally arranged at the end cap portion. Multiple cells are connected in series and / or in parallel via the electrode terminals for various applications.

[0052] The battery device provided in the embodiment of the present application can be a power source for electrical equipment. Electrical equipment can be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer.

[0053] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0054] For example, Fig.13 This is a structural diagram of an embodiment of a vehicle 1000 of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 100, a controller 200 and a motor 300 may be provided inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand during the start, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may 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.

[0055] At present, the power battery, as one of the main energy sources, is mostly a battery device composed of lithium cells in mainstream new energy vehicles. The physical and chemical properties of lithium cells determine that they cannot have a high tolerance for ambient temperature and their own operating temperature like ordinary lead-acid batteries; when the temperature is higher than a certain threshold, the lithium cells will undergo irreversible performance deterioration, and in extreme cases, it will even cause thermal runaway of the cells; once the cells have thermal runaway, it is easy to form an uncontrollable thermal runaway chain reaction, and eventually cause fires, explosions and other serious threats to the personal and property safety of consumers. Therefore, one of the important tasks of the battery management system on new energy vehicles is to intervene in time when the battery is overheated to prevent it from happening. In order to detect the overheating of the battery in time, it is necessary to set temperature sensors in key areas of the battery device to reflect the temperature conditions of the corresponding areas in real time through temperature sensors.

[0056] In the related art, the temperature sensor is first fixed on a plastic bracket, and then the thermosensitive electronics are fixed between the two poles of the battery cell through the plastic bracket, which requires an additional plastic bracket, resulting in high costs.

[0057] Based on the above problems, the utility model proposes a battery device 100, which aims to solve the problem of needing to add an additional plastic bracket to fix the temperature sensor 12, so as to reduce costs. The battery device 100 includes a busbar assembly 10, a circuit board 20 and a plurality of battery cells 30, the circuit board 20 connects the plurality of battery cells 30, and the plurality of busbars 11 of the busbar assembly 10 are configured to connect the circuit board 20 and the plurality of battery cells 30. The following is a detailed description of the battery device 10 in conjunction with specific drawings and embodiments.

[0058] See also Figures 1 to 9 In one embodiment of the utility model, the battery device 100 includes a bus assembly 10, a circuit board 20 and a plurality of battery cells 30, the circuit board 20 connects the plurality of battery cells 30, the bus assembly 10 includes a plurality of bus bars 11 and a temperature sensor 12; the plurality of bus bars 11 are configured to connect the circuit board 20 and the plurality of battery cells 30, at least one bus bar 11 is provided with a connection hole 111; the temperature sensor 12 includes a shell 121 and a temperature sensing element 122 arranged in the shell 121, the temperature sensing element 122 is configured to collect the temperature of the battery cells 30; the shell 121 is provided with a connecting protrusion 121a, the outer side of the connecting protrusion 121a is provided with a buckling portion 121b, the connecting protrusion 121a is penetrated through the connecting hole 111, and the buckling portion 121b is buckled with the bus 11; a deformation space 121c is formed between the buckling portion 121b and the connecting protrusion 121a.

[0059] In this embodiment, at least one busbar 11 is provided with a connection hole 111. It is understandable that the connection hole 111 may be provided on one, two, three or more busbars 11, that is, the connection hole 111 may be provided on some busbars 11, or the connection hole 111 may be provided on all busbars 11. When only one busbar 11 is provided with a connection hole 111, a temperature sensor 12 may be provided at the connection hole 111, that is, the temperature of the corresponding battery cell 30 may be collected by using the temperature sensor 12; when multiple busbars 11 are provided with connection holes 111, a temperature sensor 12 may be provided at each connection hole 111, so that multiple temperature sensors 12 may be used to collect the temperatures of multiple battery cells 30 respectively, which can improve the detection accuracy and reduce errors.

[0060] In one embodiment, during the design process, the highest temperature cell 30 and the lowest temperature cell 30 among the multiple battery cells 30 are first determined through simulation tests, and a connection hole 111 is provided on the bus 11 corresponding to the highest temperature cell 30 and the bus 11 corresponding to the lowest temperature cell 30. Two temperature sensors 12 are respectively provided at the connection holes 111 of the two bus bars 11. The two temperature sensors 12 are used to respectively collect the temperatures of the highest temperature cell 30 and the lowest temperature cell 30, so as to obtain the maximum temperature difference of the multiple battery cells 30. When the maximum temperature difference exceeds the threshold value, it can be determined that the battery device 100 is in an abnormal state at this time, and the user is reminded to handle it in time.

[0061] In practical applications, the connection protrusion 121 a on the housing 121 may be columnar, or may be a block, plate, strip, or other shaped structure, as long as it can be passed through the connection of the bus 11 .

[0062] In practical applications, the buckle portion 121b can be an integrally formed structure with the connecting protrusion 121a, or can be connected to the connecting protrusion 121a by bonding, screw connection, etc.

[0063] In this embodiment, the bus 11 has a first surface and a second surface that are arranged opposite to each other, and the connecting hole 111 runs through from the first surface to the second surface. During the installation process, the temperature sensor 12 can be placed on the first surface of the bus 11, and the connecting protrusion 121a is aligned with the connecting hole 111; then the temperature sensor 12 is pressed so that the connecting protrusion 121a is inserted into the connecting hole 111; when the buckle 121b is in contact with the first surface of the bus 11, the pressing force on the temperature sensor 12 is increased so that the buckle 121b is deformed until the buckle 121b passes through the connecting hole 111 to move from the first surface to the second surface. At this time, the buckle 121b is buckled on the second surface of the bus 11, and the temperature sensor 12 can be installed on the bus 11.

[0064] Optionally, in order to facilitate the buckling portion 121b to pass through the connecting hole 111, the connecting protrusion 121a and the connecting hole 111 can be loosely matched so that the buckling portion 121b can smoothly pass through the connecting hole 111 through the gap between the connecting protrusion 121a and the connecting hole 111.

[0065] In summary, in the technical solution of the embodiment of the present application, the technical solution of the utility model is directly provided with a connecting protrusion 121a on the shell 121 of the temperature sensor 12, so that the connecting protrusion 121a is passed through the connecting hole 111 of the bus 11, and the buckle portion 121b is passed through the connecting hole 111 and buckled on the bus 11, so that the temperature sensor 12 can be fixed on the bus 11, thereby eliminating the need for an additional plastic bracket to fix the temperature sensor 12, reducing the cost; at the same time, the fixing effect of the temperature sensor 12 can be effectively improved under the action of the buckle portion 121b, reducing the risk of falling off, and achieving an anti-falling effect. In addition, when the snap-fit ​​portion 121b passes through the connecting hole 111, the design of the deformation space 121c can provide space for the snap-fit ​​portion 121b to deform, making it easier for the snap-fit ​​portion 121b to deform and pass through the connecting hole 111 smoothly, thereby reducing the pressure on the temperature sensor 12, making installation more convenient, and reducing the risk of fracturing due to excessive pressure.

[0066] In practical applications, the deformation space 121c can be a closed space or an open space, as long as the buckling portion 121b can be deformed.

[0067] See also Figure 2 In one embodiment of the present invention, the opening of the deformation space 121 c faces the bus bar 11 .

[0068] It should be noted that the opening of the deformation space 121 c toward the bus bar 11 refers to the state in which the buckling portion 121 b has been buckled to the bus bar 11 .

[0069] With such a design, the snap-fitting portion 121b can be deformed more easily during the process of passing through the connection hole 111 so as to pass through the connection hole 111 smoothly, and at the same time, the snap-fitting portion 121b can quickly recover its deformation after passing through the connection hole 111 and snap-fit ​​onto the bus 11.

[0070] See also Figure 2 In one embodiment of the present invention, one end of the buckle portion 121 b is connected to the connecting protrusion 121 a , and the other end extends in a direction away from the connecting protrusion 121 a and is tilted toward the bus 11 .

[0071] Such a design can make the snap-fitting portion 121b take the shape of an airplane wing, making it easier for the snap-fitting portion 121b to deform and pass through the connection hole 111 smoothly, and at the same time making it possible for the snap-fitting portion 121b to recover its deformation more quickly and snap onto the bus 11 after passing through the connection hole 111.

[0072] See also Figure 2In one embodiment of the present invention, the thickness of the buckling portion 121b gradually decreases in a direction from close to the connecting protrusion 121a to away from the connecting protrusion 121a.

[0073] Such a design can make the thickness of the position where the snap-fitting portion 121b is connected to the connecting protrusion 121a larger, and make the thickness of the end of the snap-fitting portion 121b away from the connecting protrusion 121a smaller. In this way, when the snap-fitting portion 121b passes through the connecting hole 111 to be deformed, the connection strength between the snap-fitting portion 121b and the connecting protrusion 121a can be strengthened to avoid the connection between the snap-fitting portion 121b and the connecting protrusion 121a from being broken. At the same time, the snap-fitting portion 121b can be more easily deformed and pass through the connecting hole 111 smoothly.

[0074] See also Figure 2 , Figure 3 In one embodiment of the present invention, buckling portions 121b are provided on opposite sides of the connecting protrusion 121a.

[0075] Such a design can be buckled onto the bus 11 through the buckling portions 121 b connecting the protrusions 121 a on both sides, which can further enhance the fixing effect of the temperature sensor 12 and further reduce the risk of falling off.

[0076] Of course, in other embodiments, a plurality of buckling portions 121b may be spaced apart around the connecting protrusion 121a so that the connecting protrusion 121a can be buckled onto the bus 11 through the plurality of buckling portions 121b at the same time, thereby achieving a better anti-falling effect.

[0077] See also Figures 9 to 12 In one embodiment of the utility model, the circuit board 20 includes a first circuit board 21 and a second circuit board 22 ; the first circuit board 21 connects a plurality of battery cells 30 and a plurality of bus bars 11 ; the temperature sensing element 122 is connected to the first circuit board 21 through the second circuit board 22 .

[0078] With such a design, after the temperature sensing element collects the temperature of the battery cell 30 , it can be transmitted to the first circuit board 21 through the second circuit board 22 , so that timely intervention can be made through the first circuit board 21 when the battery cell 30 overheats, thereby avoiding thermal runaway of the battery cell 30 .

[0079] Exemplarily, the first circuit board 21 may be a flexible circuit board 20 (FPC), and the second circuit board 22 may be a rigid circuit board 20 (PCB).

[0080] In this embodiment, the side edge of the first connecting plate is provided with a plurality of spaced apart lugs 211, and the plurality of lugs 211 are used to connect a plurality of bus bars 11, wherein at least one bus bar 11 is connected to at least one lug 211 of the first connecting plate via a temperature sensor and a second circuit board 22.

[0081] In practical applications, the second circuit board 22 can be connected to the first circuit board 21 by plugging, screw connection, soldering, etc. Of course, in order to improve the connection reliability between the second circuit board 22 and the first circuit board 21, the second circuit board 22 can be connected to the first circuit board 21 by soldering.

[0082] In practical applications, the temperature sensor 12 may also be connected to the second circuit board 22 by plugging, screw connection, soldering, or the like.

[0083] See also Fig.11 , Fig.12 In one embodiment of the present invention, the second circuit board 22 is pluggably disposed in the housing 121 .

[0084] It can be understood that when the second circuit board 22 is inserted into the housing 121 of the temperature sensor 12 , the second circuit board 22 can be connected to the temperature sensing element 122 inside the housing 121 .

[0085] With such a design, when the temperature sensor 12 is damaged, the second circuit board 22 can be pulled out of the housing 121 of the temperature sensor 12, and the snap-fit ​​portion 121b and the connecting protrusion 121a can be removed from the connecting hole 111 of the bus 11, so that the temperature sensor 12 can be removed separately, thereby facilitating the repair or replacement of the temperature sensor 12 without scrapping the entire battery device 100, thereby achieving the purpose of cost saving.

[0086] See also Figure 2 , Figure 3 , Fig.10 In one embodiment of the utility model, the shell 121 includes a bottom shell 1211 and an upper cover 1212; the bottom shell 1211 is provided with a connecting protrusion 121a; the upper cover 1212 is covered on the bottom shell 1211, and is enclosed with the bottom shell 1211 to form an inner cavity 121d and an insertion port 121e connected to the inner cavity 121d, the temperature sensing element 122 is installed in the inner cavity 121d, and at least part of the second circuit board 22 is inserted into the inner cavity 121d through the insertion port 121e to be connected to the temperature sensing element 122.

[0087] With such a design, when installing the temperature sensor 12, the upper cover 1212 can be opened first, and then the temperature sensing element 122 can be installed in the bottom shell 1211, and then the upper cover 1212 can be closed, thereby facilitating the installation of the temperature sensing element 122; in addition, when the temperature sensor 12 needs to be installed on the second circuit board 22, at least a portion of the second circuit board 22 can be directly inserted into the inner cavity 121d from the plug interface 121e to achieve the connection between the second circuit board 22 and the temperature sensing element 122; and when the temperature sensor 12 needs to be removed, the second circuit board 22 can be directly unplugged from the plug interface 121e of the temperature sensor 12, thereby achieving quick plug-in and disassembly between the second circuit board 22 and the temperature sensor 12.

[0088] In actual application, the upper cover 1212 and the bottom shell 1211 can be connected by screw connection, clamping or the like.

[0089] See also Fig.10 In one embodiment of the utility model, the second circuit board 22 is provided with a positive gold finger 221 and a negative gold finger 222, the temperature sensing element 122 is provided with a positive conductor 1221 and a negative conductor 1222, the positive gold finger 221 is connected to the positive conductor 1221, and the negative gold finger 222 is connected to the negative conductor 1222.

[0090] With such a design, when the second circuit board 22 is inserted into the housing 121 of the temperature sensor 12, the positive gold finger 221 and the negative gold finger 222 on the second circuit board 22 can be connected to the positive conductor 1221 and the negative conductor 1222 on the temperature sensing element 122 respectively, thereby achieving electrical conduction between the second circuit board 22 and the temperature sensing element 122.

[0091] It should be noted that the connection between the positive electrode gold finger 221 and the positive electrode conductor 1221 refers to an electrical connection, not a fixed connection, that is, when the second circuit board 22 is pulled out of the housing 121, the positive electrode gold finger 221 is separated from the positive electrode conductor 1221. Similarly, the connection between the negative electrode gold finger 222 and the negative electrode conductor 1222 refers to an electrical connection, not a fixed connection, that is, when the second circuit board 22 is pulled out of the housing 121, the negative electrode gold finger 222 is separated from the negative electrode conductor 1222.

[0092] See also Fig.10In one embodiment of the utility model, positive electrode gold fingers 221 and negative electrode gold fingers 222 are provided on opposite sides of the second circuit board 22; the positive electrode conductor 1221 includes a first positive electrode spring sheet and a second positive electrode spring sheet arranged oppositely, the first positive electrode spring sheet and the second positive electrode spring sheet clamp the second circuit board 22, and are respectively connected to the two positive electrode gold fingers 221; the negative electrode conductor 1222 includes a first negative electrode spring sheet and a second negative electrode spring sheet arranged oppositely, the first negative electrode spring sheet and the second negative electrode spring sheet clamp the second circuit board 22, and are respectively connected to the two negative electrode gold fingers 222.

[0093] Such a design can make the first positive spring clip and the second positive spring clip form a clip-like structure, so that the second circuit board 22 can be clamped by the first positive spring clip and the second positive spring clip, and the first positive spring clip and the second positive spring clip can respectively contact the positive gold fingers 221 on both sides of the second circuit board 22 to achieve electrical conduction, which can improve the connection reliability between the positive gold fingers 221 and the positive conductor 1221, and avoid the risk of instantaneous disconnection during vibration; similarly, the first negative spring clip and the second negative spring clip can also be formed into a clip-like structure, so that the second circuit board 22 can be clamped by the first negative spring clip and the second negative spring clip, and the first negative spring clip and the second negative spring clip can respectively contact the negative gold fingers 222 on both sides of the second circuit board 22 to achieve electrical conduction, which can improve the connection reliability between the negative gold fingers 222 and the negative conductor 1222, and avoid the risk of instantaneous disconnection during vibration.

[0094] See also Fig.10 In one embodiment of the utility model, the second circuit board 22 is further provided with a fixing hole 223 , and the upper cover 1212 is provided with a fixing column 121 f , and the fixing column 121 f is passed through the fixing hole 223 .

[0095] With such a design, during the installation process, the upper cover 1212 can be opened first, and then the second circuit board 22 can be inserted into the inner cavity 121d through the plug interface 121e to connect with the temperature sensing element 122 in the inner cavity 121d, and then the upper cover 1212 can be closed. At this time, the fixing column 121f on the upper cover 1212 is inserted into the fixing hole 223 of the second circuit board 22, so that the temperature sensor 12 can be fixed under the cooperation of the fixing column 121f and the fixing hole 223, so as to reduce the risk of the temperature sensor 12 falling off the second circuit board 22.

[0096] In practical application, the fixing hole 223 can be set on one side of the positive gold finger 221 or the negative gold finger 222, or between the positive gold finger 221 and the negative gold finger 222, as long as the positive gold finger 221 and the negative gold finger 222 are not damaged.

[0097] See also Fig.10In one embodiment of the utility model, the second circuit board 22 is further provided with a separation groove 224, and the separation groove 224 is located between the positive gold finger 221 and the negative gold finger 222, and the upper cover 1212 is further provided with an insulating bar, and the insulating bar is inserted into the separation groove 224.

[0098] With such a design, when the second circuit board 22 is inserted into the inner cavity 121d of the shell 121, the upper cover 1212 is closed, and the insulating bar on the upper cover 1212 is inserted into the separation groove 224 of the second circuit board 22, so as to separate the positive gold finger 221 and the negative gold finger 222 through the insulating bar, thereby preventing foreign matter from falling between the positive gold finger 221 and the negative gold finger 222 and causing a short circuit.

[0099] In practical applications, the insulating strip may be made of any material that can provide insulation, such as plastic or wood, and is not specifically limited here.

[0100] See also Figure 7 In one embodiment of the present invention, a thermal pad 40 is provided between the temperature sensing element 122 and the battery cell 30 , and the temperature of the battery cell 30 is conducted to the temperature sensing element 122 through the thermal pad 40 .

[0101] With such a design, the temperature of the battery cell 30 can be transferred to the temperature sensing element 122 through the thermal pad 40 , so that the temperature of the battery cell 30 can be accurately collected by the temperature sensing element 122 , thereby improving the accuracy of the temperature collected by the temperature sensing element 122 .

[0102] Optionally, the temperature sensing element 122 is sealed in the inner cavity of the shell 121 by glue dispensing. An opening is provided on the side of the shell 121 close to the thermal pad 40. The thermal pad 40 can directly come into thermal contact with the temperature sensing element 122 through the opening of the shell 121, thereby improving the accuracy of temperature collection by the temperature sensing element 122.

[0103] Optionally, the thermal pad 40 may be a thermally conductive silicone pad, which has good thermal conductivity.

[0104] See also Figure 2 In one embodiment of the present invention, the temperature sensing element 122 is a thermistor.

[0105] Such a design uses a thermistor as the temperature sensing element 122, and can reflect the temperature condition of the corresponding area of ​​the battery cell 30 in real time through the change of the thermistor resistance value. It also has the advantages of high sensitivity, small size, small thermal inertia, fast response speed, and the ability to withstand large impacts and vibrations.

[0106] See also Figures 1 to 3The utility model also proposes a bus assembly 10, which includes a plurality of bus bars 11 and a temperature sensor 12; the plurality of bus bars 11 are configured to connect the circuit board 20 and the plurality of battery cells 30, and at least one bus bar 11 is provided with a connecting hole 111; the temperature sensor 12 includes a shell 121 and a temperature sensing element 122 arranged in the shell 121, and the temperature sensing element 122 is configured to collect the temperature of the battery cell 30; the shell 121 is provided with a connecting protrusion 121a, and a buckling portion 121b is provided on the outer side of the connecting protrusion 121a, the connecting protrusion 121a is penetrated through the connecting hole 111, and the buckling portion 121b is buckled to the bus bar 11; a deformation space 121c is formed between the buckling portion 121b and the connecting protrusion 121a.

[0107] According to some embodiments of the present application, the present application provides a battery device 100 including a bus assembly 10, in combination with reference to Figures 1 to 12 The battery device 100 further includes a circuit board 20 and a plurality of battery cells 30; the busbar assembly 10 includes a plurality of busbars 11 and a temperature sensor 12; the plurality of busbars 11 are configured to connect the circuit board 20 and the plurality of battery cells 30, and at least one busbar 11 is provided with a connection hole 111; the temperature sensor 12 includes a housing 121 and a temperature sensing element 122 disposed in the housing 121, the housing 121 is provided with a connection protrusion 121a, and a buckle portion 121b is provided on the outer side of the connection protrusion 121a, the connection protrusion 121a is passed through the connection hole 111, and the buckle portion 121b passes through the connection hole 111 and buckles with the busbar 11; the temperature sensing element 122 is configured to collect the temperature of the battery cell 30. Among them, one end of the buckle portion 121b is connected to the connection protrusion 121a, and the other end extends in a direction away from the connection protrusion 121a, and is tilted toward the busbar 11, so that the buckle portion 121b is in the shape of an airplane wing. The circuit board 20 includes a first circuit board 21 and a second circuit board 22 ; the first circuit board 21 connects multiple battery cells 30 and multiple bus bars 11 ; the second circuit board 22 is pluggably disposed in the housing 121 so that the temperature sensing element 122 is connected to the first circuit board 21 through the second circuit board 22 .

[0108] In the technical solution of the embodiment of the present application, the technical solution of the utility model directly provides a connecting protrusion 121a on the shell 121 of the temperature sensor 12, so that the connecting protrusion 121a is inserted into the connecting hole 111 of the bus 11, and the buckle part 121b is passed through the connecting hole 111 and buckled on the bus 11, so that the temperature sensor 12 can be fixed on the bus 11, thereby eliminating the need for an additional plastic bracket to fix the temperature sensor 12, reducing the cost; at the same time, the fixing effect of the temperature sensor 12 can be effectively improved under the action of the buckle part 121b, reducing the risk of falling off, and achieving an anti-falling effect. In addition, by making the buckle part 121b in the shape of an airplane wing, the buckle part 121b is easier to deform and pass through the connecting hole 111 smoothly, and at the same time, the buckle part 121b can recover its deformation more quickly after passing through the connecting hole 111 and buckle on the bus 11. Furthermore, when the temperature sensor 12 is damaged, the second circuit board 22 can be pulled out of the housing 121 of the temperature sensor 12, and the snap-fit ​​portion 121b and the connecting protrusion 121a can be removed from the connecting hole 111 of the bus 11, so that the temperature sensor 12 can be removed separately, thereby facilitating the repair or replacement of the temperature sensor 12 without scrapping the entire battery device 100, thereby achieving the purpose of cost saving.

[0109] The utility model 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.

[0110] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery device, characterized in that: The invention comprises a busbar assembly, a circuit board and a plurality of battery cells, wherein the circuit board connects the plurality of battery cells, and the busbar assembly comprises: A plurality of busbars, configured to connect the circuit board and the plurality of battery cells, at least one of the busbars being provided with a connection hole; A temperature sensor, comprising a housing and a temperature sensing element disposed in the housing, wherein the temperature sensing element is configured to collect the temperature of the battery cell; The shell is provided with a connecting protrusion, and a buckling portion is provided on the outer side of the connecting protrusion. The connecting protrusion is passed through the connecting hole, and the buckling portion is buckled with the bus; a deformation space is formed between the buckling portion and the connecting protrusion.

2. The battery device according to claim 1, characterized in that The opening of the deformation space faces the bus bar.

3. The battery device according to claim 2, characterized in that: One end of the buckle portion is connected to the connection protrusion, and the other end extends in a direction away from the connection protrusion and is inclined toward the bus bar.

4. The battery device according to claim 3, characterized in that: The thickness of the buckle portion gradually decreases in a direction from close to the connecting protrusion to away from the connecting protrusion.

5. The battery device according to any one of claims 1 to 4, characterized in that: The buckling parts are arranged on opposite sides of the connecting protrusion.

6. The battery device according to any one of claims 1 to 4, characterized in that: The circuit board comprises: A first circuit board, the first circuit board connecting the plurality of battery cells and the plurality of bus bars; and A second circuit board, wherein the temperature sensing element is connected to the first circuit board through the second circuit board.

7. The battery device according to claim 6, characterized in that: The second circuit board is pluggably arranged in the housing.

8. The battery device according to claim 7, characterized in that: The housing comprises: A bottom shell, provided with the connecting protrusion; and The upper cover is arranged on the bottom shell and is enclosed with the bottom shell to form an inner cavity and an insertion port connected to the inner cavity. The temperature sensing element is installed in the inner cavity. At least part of the second circuit board is inserted into the inner cavity through the insertion port to connect with the temperature sensing element.

9. The battery device according to claim 8, characterized in that: The second circuit board is provided with a positive gold finger and a negative gold finger, the temperature sensing element is provided with a positive conductor and a negative conductor, the positive gold finger is connected to the positive conductor, and the negative gold finger is connected to the negative conductor.

10. The battery device according to claim 9, characterized in that The positive electrode gold finger and the negative electrode gold finger are provided on opposite sides of the second circuit board; The positive electrode conductor comprises a first positive electrode spring sheet and a second positive electrode spring sheet which are arranged opposite to each other, wherein the first positive electrode spring sheet and the second positive electrode spring sheet sandwich the second circuit board and are respectively connected to the two positive electrode gold fingers; The negative electrode conductor includes a first negative electrode spring sheet and a second negative electrode spring sheet that are arranged opposite to each other. The first negative electrode spring sheet and the second negative electrode spring sheet sandwich the second circuit board and are respectively connected to the two negative electrode gold fingers.

11. The battery device according to claim 9, characterized in that: The second circuit board is further provided with a fixing hole, and the upper cover is provided with a fixing column, and the fixing column is passed through the fixing hole; And / or, the second circuit board is further provided with a separation groove, the separation groove is located between the positive electrode gold finger and the negative electrode gold finger, and the upper cover is further provided with an insulating bar, and the insulating bar is inserted into the separation groove.

12. The battery device according to any one of claims 1 to 4, characterized in that: A thermal pad is provided between the temperature sensing element and the battery core, and the temperature of the battery core is conducted to the temperature sensing element through the thermal pad.

13. The battery device according to any one of claims 1 to 4, characterized in that: The temperature sensing element is a thermistor.

14. A busbar assembly, characterized in that: include: A plurality of busbars configured to connect the circuit board and the plurality of battery cells, at least one of the busbars being provided with a connection hole; A temperature sensor, comprising a housing and a temperature sensing element disposed in the housing, wherein the temperature sensing element is configured to collect the temperature of the battery cell; The shell is provided with a connecting protrusion, and a buckling portion is provided on the outer side of the connecting protrusion. The connecting protrusion is passed through the connecting hole, and the buckling portion is buckled with the bus; a deformation space is formed between the buckling portion and the connecting protrusion.

15. An electrical equipment, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 13.

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