Battery assembly, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery assembly, a battery and electric equipment, the battery assembly comprises a plurality of battery monomers, a first bus member and a signal acquisition member, the first bus member is respectively connected with two different battery monomers, the first bus member spans M battery monomers, M is greater than zero, and M is greater than zero. The signal acquisition part and the first confluence part are located on the same side of the battery monomers, the signal acquisition part and the first confluence part are arranged side by side and are electrically connected, the signal acquisition part is a meltable part, and the meltable part is configured to be capable of being melted by emissions discharged during pressure relief of the battery monomers arranged opposite to the meltable part. In the using process, when thermal runaway happens to the single battery arranged opposite to the signal collecting piece, high-temperature emissions sprayed out after thermal runaway make contact with the signal collecting piece, high-temperature matter melts the signal collecting piece, the situation of short circuit between the signal collecting piece and the single battery is reduced, and the service life of the battery is prolonged. And the safety performance of the battery assembly in the use process is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery assembly, a battery and an electrical device. Background Art

[0002] With the development of new energy, more and more fields are using new energy as a power source. Due to its advantages such as high energy density, rechargeable, safe and environmentally friendly, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0003] The battery includes multiple battery cells, a signal collection component and a busbar. The busbar connects the multiple cells in series and / or in parallel. The signal collection component is electrically connected to the busbar to collect signals. However, when a battery cell experiences thermal runaway, the opening component of the pressure relief mechanism of the battery cell opens to relieve the pressure of the battery cell. The opening component is a metal component. After opening, it is easy to overlap with the signal collection component, resulting in the risk of short circuit or even arcing. Utility Model Content

[0004] In view of the above problems, the present application provides a battery assembly, a battery and an electrical device, which solve the problem of short circuit of the signal acquisition component when the battery cell has thermal runaway.

[0005] The first aspect of the present application provides a battery assembly, the battery assembly comprising:

[0006] Multiple battery cells;

[0007] A first busbar, the first busbar is connected to two different battery cells respectively, and the first busbar spans M battery cells, where M is greater than zero;

[0008] The signal collection component is located on the same side of the battery cell as the first busbar, the signal collection component is arranged side by side with the first busbar and is electrically connected to the first busbar, the signal collection component is a fusible component, and the fusible component is configured to be melted by the emissions discharged when the battery cell arranged opposite to the fusible component is depressurized.

[0009] Specifically, during the use of the battery assembly, when a battery cell arranged opposite to the signal acquisition component experiences thermal runaway, the high-temperature emissions ejected by the thermal runaway come into contact with the signal acquisition component, and the high-temperature emissions melt the signal acquisition component, thereby reducing the short circuit between the signal acquisition component and the battery cell and improving the safety performance of the battery assembly during use.

[0010] In some embodiments of the present application, the melting point of the signal acquisition component is less than 300 degrees Celsius. By setting the melting point of the signal acquisition component, the signal acquisition component can be effectively melted when thermal runaway occurs in the battery cell, further reducing the short circuit between the signal acquisition component and the battery cell, so that the safety performance of the battery assembly is further improved.

[0011] In some embodiments of the present application, the signal acquisition component is a conductive metal component or a conductive polymer component. By setting the signal acquisition component as a conductive alloy component or a conductive polymer component, the signal acquisition component can be selected according to needs, which improves the flexibility of signal acquisition component selection and further improves the convenience of battery assembly processing and manufacturing.

[0012] In some embodiments of the present application, the connection between the signal acquisition component and the first busbar is welding, clamping, riveting or bonding. By setting the connection between the signal acquisition component and the first busbar, the connection between the signal acquisition component and the first busbar can be selected according to needs, which improves the flexibility of assembly between the signal acquisition component and the first busbar, thereby improving the convenience of processing and manufacturing of the battery assembly.

[0013] In some embodiments of the present application, the battery cell includes a first surface, the signal acquisition component is on a side of the battery cell having the first surface, and the signal acquisition component is spaced apart from the first surface. By arranging the signal acquisition component apart from the first surface, an insulating gap is provided between the signal acquisition component and the battery cell, thereby reducing the occurrence of a short circuit between the signal acquisition component and the battery cell.

[0014] In some embodiments of the present application, the minimum distance between the signal acquisition component and the first surface is greater than or equal to 2 mm and less than or equal to 10 mm. By setting the distance between the signal acquisition component and the first surface, the overall structure of the battery assembly is made more compact while maintaining good insulation performance between the signal acquisition component and the battery cell.

[0015] In some embodiments of the present application, the battery cell includes a pressure relief mechanism, which is disposed on the first surface, and the signal acquisition component has a first projection on the first surface, and the first projection and the pressure relief mechanism have an overlapping area or are staggered. The pressure relief mechanism is provided, and when thermal runaway occurs in the battery cell, the pressure relief operation can be performed through the pressure relief mechanism, so that the safety performance of the battery assembly is improved, and the relative position of the first projection of the signal acquisition component and the pressure relief mechanism is set to improve the flexibility of the arrangement and installation of the signal acquisition component.

[0016] In some embodiments of the present application, the first busbar has a second projection on the first surface, and the second projection is staggered with the pressure relief mechanism. The second projection of the first busbar is staggered with the pressure relief mechanism, thereby reducing the obstruction of the first busbar to the pressure relief mechanism, so that the pressure relief mechanism can be opened smoothly, further improving the safety performance of the battery assembly.

[0017] In some embodiments of the present application, the battery assembly further includes a second busbar, the second busbar is respectively connected to two different battery cells, the second busbar spans N battery cells, N is greater than or equal to zero, and M is greater than N. The second busbar is provided and combined with the first busbar, so that flexible electrical connection between multiple battery cells can be achieved.

[0018] In some embodiments of the present application, the second busbar and the first busbar are arranged side by side on the same side of the battery cell, and the second busbar is insulated from the first busbar. By isolating the first busbar from the second busbar, the possibility of a short circuit between the first busbar and the second busbar is reduced, so that the safety performance of the battery is further improved.

[0019] In some embodiments of the present application, the second busbar has a third projection on the first surface, and the third projection is staggered with the pressure relief mechanism. The third projection of the second busbar is staggered with the pressure relief mechanism, thereby reducing the obstruction of the second busbar to the pressure relief mechanism, so that the pressure relief mechanism can be opened smoothly, further improving the safety performance of the battery assembly.

[0020] In some embodiments of the present application, the battery assembly further includes a circuit component, which is electrically connected to the signal acquisition component. The circuit component is provided and electrically connected to the signal acquisition component so that the sampling signal of the signal acquisition component can be transmitted, thereby effectively realizing the signal sampling monitoring of the battery assembly.

[0021] In some embodiments of the present application, the circuit component includes a flexible circuit board. The circuit component is configured as a flexible circuit board, so that the volume of the circuit component can be reduced, thereby making the battery assembly more compact.

[0022] A second aspect of the present application provides a battery, comprising the battery assembly as described above.

[0023] Among them, when the battery cell in the battery assembly undergoes thermal runaway during use, the high-temperature material ejected by the thermal runaway comes into contact with the signal acquisition component, and the high-temperature material melts the signal acquisition component, thereby reducing the short circuit between the signal acquisition component and the battery cell and improving the safety performance of the battery assembly during use.

[0024] The third aspect of the present application is an electrical device, comprising a battery according to the above. When the battery is in use, when a battery cell in a battery assembly undergoes thermal runaway, the high-temperature material ejected by the thermal runaway contacts the signal acquisition component, and the high-temperature material melts the signal acquisition component, thereby reducing the short circuit between the signal acquisition component and the battery cell, and improving the safety performance of the battery assembly during use.

[0025] 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, it can be implemented in accordance with the contents of the specification. In order to make the above and 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

[0026] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application is shown schematically;

[0027] Figure 2 Schematically shows a schematic structural diagram of a battery according to an embodiment of the present application;

[0028] Figure 3 Schematically shows a schematic structural diagram of a battery assembly according to an embodiment of the present application;

[0029] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the battery assembly shown in;

[0030] Figure 5 for Figure 3 A schematic structural diagram of the battery assembly from another perspective shown in ;

[0031] Figure 6 for Figure 5 A cross-sectional view of an AA in a battery assembly shown in ;

[0032] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part B in the structure shown in.

[0033] The reference numerals are as follows:

[0034] 1000. Vehicles;

[0035] 100, battery; 200, controller; 300, motor;

[0036] 10. Battery components;

[0037] 11. Battery cells;

[0038] 111. pressure relief mechanism; 112. electrode terminal; 113. first surface;

[0039] 12. A first busbar;

[0040] 13. Second busbar;

[0041] 14. Signal acquisition components;

[0042] 15. Circuit components;

[0043] 20. Box body;

[0044] 21. Part I; 22. Part II;

[0045] a. Minimum distance between the signal collection component and the first surface. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application will be 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] 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).

[0052] 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. They 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 element 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.

[0053] 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 elements or the interaction relationship between two elements. 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 the specific circumstances.

[0054] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0055] In the related art, the battery includes multiple battery cells, a signal collection component and a busbar. The busbar connects the multiple cells in series and / or in parallel, and the signal collection component is electrically connected to the busbar to collect signals. However, when a battery cell experiences thermal runaway, the opening component of the pressure relief mechanism of the battery cell opens to relieve the pressure of the battery cell. The opening component is a metal component, and after opening, it is easy to overlap with the signal collection component, thereby causing the risk of short circuit or even arcing.

[0056] In the present application, the signal acquisition component is set as a fusible component, and the fusible component is configured to be melted when the battery cell thermal runaway occurs. During the use of the battery assembly, when the battery cell arranged opposite to the signal acquisition component thermal runaway occurs, the high-temperature material ejected by the thermal runaway contacts the signal acquisition component, and the high-temperature material melts the signal acquisition component, thereby reducing the short circuit between the signal acquisition component and the battery cell, and improving the safety performance of the battery assembly during use.

[0057] The battery involved in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery cells, batteries, etc. involved in the present application can be used to form the electrical device.

[0058] In the embodiments of the present application, the electric devices using batteries as power sources may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0059] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including a box and electrical equipment using the battery. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0060] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0061] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0062] Figure 2The schematic diagram of the structure of a battery 100 according to an embodiment of the present application is shown. In order to meet different power requirements, the battery 100 may include a plurality of battery assemblies 10, which may be connected in series, in parallel, or in mixed series (mixed series refers to a mixture of series and parallel connections) and arranged in a housing 20 to form the battery 100.

[0063] The box 20 is used to provide a storage space for the battery assembly 10, and the box 20 can adopt a variety of structures. In some embodiments, the box 20 may include a first part 21 and a second part 22, the first part 21 and the second part 22 cover each other, and the first part 21 and the second part 22 jointly define a storage space for accommodating the battery assembly 10. The second part 22 may be a hollow structure with one end open, and the first part 21 may be a plate-like structure, and the first part 21 covers the open side of the second part 22, so that the first part 21 and the second part 22 jointly define a storage space; the first part 21 and the second part 22 may also be hollow structures with one side open, and the open side of the first part 21 covers the open side of the second part 22. Of course, the box 20 formed by the first part 21 and the second part 22 may be in a variety of shapes, such as a cylinder, a cuboid, etc. In addition, the material of the box body 20 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber plus epoxy resin, which is not limited in the embodiment of the present application.

[0064] like Figure 3 and Figure 4 As shown, in the present application, the battery assembly 10 includes a plurality of battery cells 11 and a plurality of busbars. The battery cell 11 refers to the smallest unit constituting the battery assembly 10. A plurality of battery cells 11 can be connected in series, in parallel, or in mixed connection (mixed connection means that a plurality of battery cells 11 are both connected in series and in parallel) to form a battery assembly 10. The busbar is a component that can connect a plurality of battery cells 11 in series or in parallel to achieve electrical connection between the plurality of battery cells 11. The busbar can also be referred to as a busbar, a bar or a busbar, which is generally a metal sheet that can be welded to the electrode terminal 112 of the battery cell 11 to connect a plurality of battery cells 11 in series or in parallel. A plurality of battery cells 11 can be directly connected in series, in parallel, or in mixed connection through a busbar assembly. Each battery cell 11 can be a secondary battery 100 or a primary battery 100; it can also be a lithium-sulfur battery 100, a sodium-ion battery 100, or a magnesium-ion battery 100, but is not limited thereto. The battery cell 11 can be cylindrical, flat, rectangular, or in other shapes.

[0065] The battery cell 11 may contain one or more battery cell assemblies and adapters. The battery cell assembly is a component in the battery cell 11 where electrochemical reactions occur. The adapter is a component in the battery cell 11 that transmits current. The battery cell assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a diaphragm is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the battery cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials are each provided with a pole ear. The positive pole ear and the negative pole ear can be located together at one end of the main body or at both ends of the main body respectively. During the charging and discharging process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the adapter is connected between the pole ear and the electrode terminal 112 to form a current loop.

[0066] In some embodiments, the battery cell 11 may be provided with functional components such as electrode terminals 112. The electrode terminals 112 may be used to electrically connect the battery cell assembly and the busbar to output or input the electrical energy of the battery cell 11. In some embodiments, the battery cell 11 may also be provided with a pressure relief mechanism 111 for releasing the internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold value. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the isolation membrane in the battery cell. The pressure relief mechanism 111 may take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve.

[0067] In some embodiments of the present application, Figures 3 to 7 As shown, a battery assembly 10 is proposed, which includes a plurality of battery cells 11, a first bus 12 and a signal collection component 14. The first bus 12 is respectively connected to two different battery cells 11, the first bus 12 spans M battery cells 11, M is greater than zero, the signal collection component 14 and the first bus 12 are located on the same side of the battery cell 11, the signal collection component 14 and the first bus 12 are arranged side by side and are electrically connected to the first bus 12, the signal collection component 14 is a fusible component, and the fusible component is configured to be melted by emissions discharged when the battery cell 11 arranged opposite to the fusible component is depressurized.

[0068] Taking the structure of a battery cell 11 as a rectangular parallelepiped as an example, multiple battery cells 11 are arranged in a preset direction, which is the length direction or width direction of the battery cell 11, wherein the first bus 12 electrically connects two spaced-apart battery cells 11, and at least one battery cell 11 is arranged between the two spaced-apart battery cells 11, and the at least one battery cell 11 is the battery cell 11 spanned by the first bus 12.

[0069] The signal collection component 14 is electrically connected to the first busbar 12. Since the first busbar 12 spans M battery cells 11 and M is greater than zero, there is a voltage difference between the signal collection component 14 and the battery cell 11. If the opening component (metal component) of the pressure relief mechanism 111 of the battery cell 11 is opened and overlaps with the signal collection component 14, a short circuit may occur between the signal collection component 14 and the battery cell 11, or even an arc may occur.

[0070] In the present application, the signal collection component 14 is a fusible component, wherein the fusible component means that when the temperature of the signal collection component 14 reaches its melting point, the signal collection component 14 will melt, and the molten signal collection component 14 will be separated from the first busbar 12, which can reduce the problem of short circuit.

[0071] In addition, the signal acquisition component 14, which is a fusible component, is configured to be melted when the battery cell 11 arranged opposite to the signal acquisition component 14 undergoes thermal runaway. This means that when the battery cell 11 arranged opposite to the signal acquisition component 14 undergoes thermal runaway, the high-temperature material ejected from the thermal runaway ablates the signal acquisition component 14, causing the signal acquisition component 14 to be melted.

[0072] The emissions from the battery cells 11 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, high-temperature and high-pressure gases produced by the reaction, flames, and the like.

[0073] When the pressure relief mechanism is activated, the high-temperature and high-pressure substances inside the battery cell 11 are discharged outward from the activated position as exhaust.

[0074] In the present application, when the battery cell 11 arranged opposite to the signal acquisition component 14 undergoes thermal runaway during the use of the battery assembly 10, the high-temperature emissions ejected by the thermal runaway come into contact with the signal acquisition component 14, and the high-temperature emissions melt the signal acquisition component 14, thereby reducing the short circuit between the signal acquisition component 14 and the battery cell 11, and improving the safety performance of the battery assembly 10 during use.

[0075] It should be noted that the signal acquisition component 14 may be a voltage signal acquisition component 14 or a current signal acquisition component 14 or the like.

[0076] In the present application, the value of M can be one, two, three, four, five, six, seven or eight, etc.

[0077] In some embodiments of the present application, the melting point of the signal collecting component 14 is less than 300 degrees Celsius.

[0078] Specifically, when the battery cell 11 experiences thermal runaway, the temperature of the high-temperature material ejected from the battery cell 11 is greater than 300 degrees Celsius. By setting the melting point of the signal acquisition component 14 to be less than 300 degrees Celsius, when the battery cell 11 disposed opposite to the signal acquisition component 14 experiences thermal runaway, the high-temperature material ejected from the battery cell 11 can melt the signal acquisition component 14, further reducing the short circuit between the signal acquisition component 14 and the battery cell 11, thereby further improving the safety performance of the battery assembly 10.

[0079] It should be pointed out that the melting point of the signal acquisition component 14 can be 290 degrees Celsius, 280 degrees Celsius, 270 degrees Celsius, 260 degrees Celsius, 250 degrees Celsius, 240 degrees Celsius, 230 degrees Celsius, 220 degrees Celsius, 210 degrees Celsius, 200 degrees Celsius, 190 degrees Celsius, 180 degrees Celsius, 170 degrees Celsius, 160 degrees Celsius, or 150 degrees Celsius.

[0080] In some embodiments of the present application, the signal collecting component 14 is a conductive metal component.

[0081] Specifically, the signal acquisition component 14 is configured as a conductive metal component, thereby being able to effectively implement signal transmission, reduce signal loss during transmission, and thereby effectively improve the accuracy of signal acquisition.

[0082] It should be pointed out that in the present application, the conductive metal parts are specifically metal parts with low melting points such as tin, lead, bismuth, indium, etc., and alloy parts formed by two or more metal parts with low melting points such as tin, lead, bismuth, indium, etc.

[0083] In some embodiments of the present application, the signal collecting component 14 is a conductive polymer component.

[0084] Specifically, the signal acquisition component 14 is configured as a conductive polymer component, thereby effectively reducing the cost of the signal acquisition component 14 and further effectively reducing the manufacturing cost of the battery assembly 10 .

[0085] It should be noted that in the present application, polyacetylene, polythiophene, polypyrrole, polyaniline, polyphenylene, polyphenylene vinylene and polydiacetylene etc. are used.

[0086] In some embodiments of the present application, the signal collecting component 14 and the first current collecting component 12 are connected by welding, clamping, riveting or bonding.

[0087] By setting the connection mode between the signal collection component 14 and the first busbar 12, the connection mode between the signal collection component 14 and the first busbar 12 can be selected according to needs, thereby improving the flexibility of assembly between the signal collection component 14 and the first busbar 12, thereby improving the convenience of processing and manufacturing the battery assembly 10.

[0088] For example, the signal collection component 14 and the first busbar 12 are connected by welding. During the connection process, the signal collection component 14 is pressed against the first busbar 12, and the two are connected and fixed by laser welding.

[0089] For example, the connection method between the signal collection component 14 and the first busbar 12 is snap-on. A first snap buckle is set on the signal collection component 14, and a second snap buckle is set on the first busbar 12. The first snap buckle is snap-fitted with the second snap buckle to fix the connection between the first busbar 12 and the signal collection component 14.

[0090] For example, the signal collection component 14 and the first busbar 12 are connected by riveting. During the connection process, the signal collection component 14 is overlapped on the first busbar 12, and the overlapping positions of the two are riveted and fixed by rivets.

[0091] For example, the signal collection component 14 and the first busbar 12 are connected by bonding. During the connection process, an adhesive (conductive adhesive) is set between the signal collection component 14 and the first busbar 12 to bond and fix the signal collection component 14 to the first busbar 12 using the adhesive.

[0092] In some embodiments of the present application, Figures 3 to 7 As shown, the battery cell 11 includes a first surface 113 , and the signal collecting component 14 is disposed on a side of the battery cell 11 having the first surface 113 , and the signal collecting component 14 is spaced apart from the first surface 113 .

[0093] Specifically, the signal acquisition component 14 has conductive properties, the first surface 113 of the battery cell 11 is formed on the shell of the battery cell 11, and the shell of the battery cell 11 is a metal component. There is a voltage difference between the signal acquisition component 14 and the battery cell 11. By spacing the signal acquisition component 14 and the first surface 113, an insulating gap is provided between the signal acquisition component 14 and the battery cell 11, thereby reducing the short circuit between the signal acquisition component 14 and the battery cell 11.

[0094] It should be noted that the battery cell 11 includes an electrode terminal 112, which is disposed on the first surface 113. When the first busbar 12 is electrically connected to the battery cell 11, the first busbar 12 and the electrode terminal 112 are electrically connected by welding, clamping, riveting or bonding.

[0095] The signal collecting component 14 and the electrode terminal 112 of the battery cell 11 are also spaced apart from each other to reduce the short circuit between the signal collecting component 14 and the electrode terminal 112 .

[0096] In some embodiments of the present application, Figure 7 As shown, the minimum distance between the signal collecting member 14 and the first surface 113 is greater than or equal to 2 mm and less than or equal to 10 mm.

[0097] Specifically, Figure 7 As shown, Figure 7 In the figure, a is the minimum distance between the signal acquisition component 14 and the first surface 113. By setting the distance between the signal acquisition component 14 and the first surface 113, the overall structure of the battery assembly 10 is made more compact while maintaining good insulation performance between the signal acquisition component 14 and the battery cell 11.

[0098] It should be noted that the minimum distance between the signal collection member 14 and the first surface 113 can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, or 9 mm.

[0099] In some embodiments of the present application, Figures 3 to 5 As shown, the battery cell 11 includes a pressure relief mechanism 111 , which is disposed on a first surface 113 , and the signal acquisition component 14 has a first projection on the first surface 113 , which has an overlapping area with the pressure relief mechanism 111 or is staggered.

[0100] Specifically, the signal acquisition component 14 is arranged on the side of the battery cell 11 having the pressure relief mechanism 111, and the signal acquisition component 14 is spaced apart from the first surface 113 having the pressure relief mechanism 111. When the battery cell 11 has thermal runaway, the pressure relief operation can be performed through the pressure relief mechanism 111, so that the safety performance of the battery assembly 10 is improved. The arrangement of the relative position between the first projection of the signal acquisition component 14 and the pressure relief mechanism 111 improves the flexibility of the arrangement and installation of the signal acquisition component 14.

[0101] It should be understood that when the first projection and the pressure relief mechanism 111 have an overlapping area, the first projection and the pressure relief mechanism 111 may partially overlap or completely overlap; when the first projection and the pressure relief mechanism 111 are staggered, the first projection and the pressure relief mechanism 111 have no overlapping area.

[0102] In some embodiments of the present application, the first collector 12 has a second projection on the first surface 113 , and the second projection is staggered with the pressure relief mechanism 111 .

[0103] Specifically, the first busbar 12 is a metal part whose melting point is greater than the temperature of the high-temperature material ejected when the pressure relief mechanism 111 is opened. If the second projection and the pressure relief mechanism 111 overlap in an area, it will interfere with the opening of the pressure relief mechanism 111. In addition, there is a voltage difference between the opening component of the pressure relief mechanism 111 and the first busbar 12, and a short circuit will occur when the opening component is opened.

[0104] In the present application, the second projection of the first busbar 12 is staggered with the pressure relief mechanism 111, thereby reducing the obstruction of the first busbar 12 to the pressure relief mechanism 111, so that the pressure relief mechanism 111 can be opened smoothly, further improving the safety performance of the battery assembly 10.

[0105] At the same time, the second projection of the first busbar 12 is staggered with the pressure relief mechanism 111, so that the first busbar 12 avoids the pressure relief mechanism 111. This can reduce the short circuit between the pressure relief mechanism 111 and the first busbar 12 after it is turned on, thereby improving the safety performance of the battery assembly 10.

[0106] It should be understood that when the second projection and the pressure relief mechanism 111 are staggered, there is no overlapping area between the second projection and the pressure relief mechanism 111 .

[0107] In some embodiments of the present application, Figures 3 to 6 As shown, the battery assembly 10 further includes a second busbar 13 , which is connected to two different battery cells 11 respectively. The second busbar 13 spans N battery cells 11 , where N is greater than or equal to zero, and M is greater than N.

[0108] Specifically, among the multiple battery cells 11 of the battery assembly 10, the multiple battery cells 11 are arranged in a preset direction, the first bus 12 connects two battery cells 11, and the second bus 13 connects the other two battery cells 11. There are M battery cells 11 between the two battery cells 11 connected to the first bus 12, M is greater than zero, and there are N battery cells 11 between the two battery cells 11 connected to the second bus 13, N is greater than or equal to zero, and M is greater than N.

[0109] The second busbar 13 is provided and combined with the first busbar 12 , so that flexible electrical connection between the plurality of battery cells 11 can be achieved.

[0110] It should be pointed out that in the present application, the number of first busbars 12 can be one, two, three, four, five, six, seven, etc., and the number of first busbars 12 can also be one, two, three, four, five, six, seven, etc.

[0111] In some embodiments of the present application, Figures 3 to 6As shown, the second busbar 13 and the first busbar 12 are arranged side by side on the same side of the battery cell 11 , and the second busbar 13 and the first busbar 12 are insulated from each other.

[0112] Specifically, the second current collector 13 and the first current collector 12 are arranged side by side on the same side of the battery cell 11 , which can improve the convenience during the assembly process, thereby effectively improving the assembly efficiency of the battery assembly 10 .

[0113] In addition, by insulating the first busbar 12 from the second busbar 13 , the possibility of a short circuit between the first busbar 12 and the second busbar 13 is reduced, so that the safety performance of the battery 100 is further improved.

[0114] It should be noted that the insulation arrangement between the first busbar 12 and the second busbar 13 includes but is not limited to arranging an insulation component between the first busbar 12 and the second busbar 13 .

[0115] In some embodiments of the present application, the second collector 13 has a third projection on the first surface 113 , and the third projection is staggered with the pressure relief mechanism 111 .

[0116] Specifically, the third projection of the second busbar 13 is staggered with the pressure relief mechanism 111 , thereby reducing the obstruction of the second busbar 13 to the pressure relief mechanism 111 , so that the pressure relief mechanism 111 can be opened smoothly, further improving the safety performance of the battery assembly 10 .

[0117] At the same time, the third projection of the second busbar 13 is staggered with the pressure relief mechanism 111 so that the second busbar 13 avoids the pressure relief mechanism 111. This can reduce the short circuit between the pressure relief mechanism 111 and the second busbar 13 after it is turned on, thereby improving the safety performance of the battery assembly 10.

[0118] It should be understood that when the third projection and the pressure relief mechanism 111 are staggered, there is no overlapping area between the third projection and the pressure relief mechanism 111 .

[0119] In some embodiments of the present application, Figures 3 to 7 As shown, the battery assembly 10 further includes a circuit component 15 , and the circuit component 15 is electrically connected to the signal collecting component 14 .

[0120] Specifically, the circuit component 15 is provided and electrically connected to the signal acquisition component 14 so that the sampling signal of the signal acquisition component 14 can be transmitted, thereby effectively realizing the signal sampling and monitoring of the battery assembly 10 .

[0121] In some embodiments of the present application, the circuit member 15 includes a flexible circuit board.

[0122] Specifically, the circuit member 15 is configured as a flexible circuit board, so that the volume of the circuit member 15 can be reduced, thereby making the battery assembly 10 more compact.

[0123] like Figures 2 to 7 As shown, the second aspect of the present application proposes a battery 100 , and the battery 100 includes the battery assembly 10 according to the above.

[0124] Among them, when the battery assembly 10 is in use, when the battery cell 11 in the battery assembly 10 has thermal runaway, the high-temperature material sprayed by the thermal runaway comes into contact with the signal acquisition component 14, and the high-temperature material melts the signal acquisition component 14, thereby reducing the short circuit between the signal acquisition component 14 and the battery cell 11, and improving the safety performance of the battery assembly 10 during use.

[0125] like Figures 1 to 7 As shown, the third aspect of the present application is an electrical device, which includes a battery 100 as described above. When the battery 100 is in use, when the battery cell 11 in the battery assembly 10 has thermal runaway, the high-temperature material ejected by the thermal runaway contacts the signal acquisition component 14, and the high-temperature material melts the signal acquisition component 14, thereby reducing the short circuit between the signal acquisition component 14 and the battery cell 11, and improving the safety performance of the battery assembly 10 during use.

[0126] 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, it can be implemented in accordance with the contents of the specification. In order to make the above and 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.

[0127] In the implementation mode of the present application, Figures 3 to 7 As shown, the present application proposes a battery assembly 10, including multiple battery cells 11, a first bus 12, a signal acquisition component 14, a second bus 13 and a flexible circuit board, the first bus 12 is respectively connected to two different battery cells 11, the first bus 12 spans M battery cells 11, M is greater than zero, the second bus 13 spans N battery cells 11, N is greater than or equal to zero, and M is greater than N.

[0128] The first busbar 12, the second busbar 13 and the signal collection part 14 are located on the same side of the battery cell 11. The signal collection part 14 is arranged side by side with the first busbar 12 and one end of the signal collection part 14 is electrically connected to the first busbar 12 by welding, and the other end of the signal collection part 14 is electrically connected to the flexible circuit board. The signal collection part 14 is a fusible part, which is configured to be melted by the discharge discharged when the battery cell 11 arranged opposite to the fusible part is depressurized. The second busbar 13 is arranged side by side with the first busbar 12 on the same side of the battery cell 11, and the second busbar 13 and the first busbar 12 are insulated.

[0129] Furthermore, the signal collecting component 14 is a conductive metal component or a conductive polymer component, and the melting point of the signal collecting component 14 is less than 300 degrees Celsius.

[0130] Further, the battery cell 11 includes a first surface 113, and the signal collecting component 14 is disposed on a side of the battery cell 11 having the first surface 113, and the signal collecting component 14 is spaced apart from the first surface 113. The minimum distance between the signal collecting component 14 and the first surface 113 is 2-3 mm.

[0131] Furthermore, the pressure relief mechanism 111 of the battery cell 11 is disposed on the first surface 113, and the signal collection member 14 has a first projection on the first surface 113, and the first projection is staggered with the pressure relief mechanism 111. The first busbar 12 has a second projection on the first surface 113, and the second projection is staggered with the pressure relief mechanism 111. The second busbar 13 has a third projection on the first surface 113, and the third projection is staggered with the pressure relief mechanism 111.

[0132] During use of the battery assembly 10 of the present application, when a battery cell 11 arranged opposite to the signal acquisition component 14 undergoes thermal runaway, the high-temperature material ejected by the thermal runaway comes into contact with the signal acquisition component 14, and the high-temperature material melts the signal acquisition component 14, thereby reducing the short circuit between the signal acquisition component 14 and the battery cell 11 and improving the safety performance of the battery assembly 10 during use.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery assembly, characterized in that: The battery assembly comprises: Multiple battery cells; A first busbar, wherein the first busbar is connected to two different battery cells respectively, and the first busbar spans M battery cells, where M is greater than zero; A signal collection component, wherein the signal collection component and the first busbar are located on the same side of the battery cell, the signal collection component and the first busbar are arranged side by side and are electrically connected to the first busbar, and the signal collection component is a fusible component, and the fusible component is configured to be melted by emissions discharged when the battery cell arranged opposite to the fusible component is depressurized.

2. The battery assembly according to claim 1, characterized in that The melting point of the signal collection component is less than 300 degrees Celsius.

3. The battery assembly according to claim 1, characterized in that The signal collecting component is a conductive metal component or a conductive polymer component.

4. The battery assembly according to claim 1, wherein: The signal collecting component and the first current collecting component are connected by welding, clamping, riveting or bonding.

5. The battery assembly according to any one of claims 1 to 4, characterized in that: The battery cell includes a first surface, the signal collecting component is disposed on a side of the battery cell having the first surface, and the signal collecting component is spaced apart from the first surface.

6. The battery assembly according to claim 5, characterized in that: The minimum distance between the signal collecting component and the first surface is greater than or equal to 2 mm and less than or equal to 10 mm.

7. The battery assembly according to claim 5, characterized in that: The battery cell comprises a pressure relief mechanism, and the pressure relief mechanism is arranged on the first surface. The signal collecting component has a first projection on the first surface, and the first projection and the pressure relief mechanism have an overlapping area or are staggered.

8. The battery assembly according to claim 7, characterized in that: The first collector has a second projection on the first surface, and the second projection is staggered with the pressure relief mechanism.

9. The battery assembly according to claim 7, characterized in that: The battery assembly further includes a second busbar, wherein the second busbar is respectively connected to two different battery cells, and the second busbar spans N battery cells, where N is greater than or equal to zero, and M is greater than N.

10. The battery assembly according to claim 9, characterized in that The second busbar and the first busbar are arranged side by side on the same side of the battery cell, and the second busbar is insulated from the first busbar.

11. The battery assembly according to claim 9, characterized in that: The second collector has a third projection on the first surface, and the third projection is staggered with the pressure relief mechanism.

12. The battery assembly according to any one of claims 1 to 4, characterized in that: The battery assembly further comprises a circuit component, and the circuit component is electrically connected to the signal collecting component.

13. The battery assembly according to claim 12, characterized in that: The circuit member includes a flexible circuit board.

14. A battery, characterized in that: The battery comprises the battery assembly according to any one of claims 1 to 13.

15. An electrical equipment, characterized in that: The electric device comprises the battery according to claim 14.

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