Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device. The battery comprises a battery monomer, a bus piece, a signal acquisition assembly and a hot riveting structure, the single battery comprises a first surface and a pole protruding out of the first surface. The confluence piece is electrically connected with the pole and is separated from the first surface in the protruding direction of the pole. The bus member includes a second surface disposed away from the first surface. The signal acquisition assembly comprises an insulating part, a temperature acquisition plate and a thermistor. The insulating part is in heat-conducting connection with the convergence part. The temperature acquisition plate is arranged on the side, close to the first surface, of the insulating part in the protruding direction. The thermistor is fixedly connected with the temperature acquisition board and is accommodated in the insulating part. The hot riveting structure fixes the insulating piece and the bus piece in a hot riveting mode. And in the protruding direction, the insulating part and the hot riveting structure are not higher than the second surface. According to the technical scheme, the accuracy of data acquisition of the signal acquisition assembly is improved, and the space utilization rate of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Technology

[0002] A battery typically consists of multiple individual cells and a busbar, which electrically connects the battery's various terminals. The battery's temperature signal is usually acquired by a temperature acquisition board that uses adhesive to bond the top cover of the individual cells or the busbar. If the temperature of the top cover or busbar rises, the adhesive's bonding strength decreases under high temperatures. Over prolonged exposure to high temperatures, the bond between the temperature acquisition board and the cells being measured loosens, leading to inaccurate temperature readings. Furthermore, when the temperature acquisition board acquires temperature signals through the busbar, it is often positioned above the busbar, increasing the battery's vertical space requirements and hindering efficient use of internal battery space. Utility Model Content

[0003] Based on this, a battery and power supply device are provided that can not only enhance the connection strength between the signal acquisition component and the bus, but also reduce the space required in the height direction of the battery.

[0004] In a first aspect, this application provides a battery, comprising:

[0005] A battery cell includes a first surface and an electrode post protruding from the first surface;

[0006] A busbar is electrically connected to the pole and spaced from the first surface in the protruding direction of the pole. The busbar includes a second surface disposed opposite to the first surface.

[0007] Signal acquisition components, including:

[0008] Insulating component, thermally connected to the busbar;

[0009] A temperature acquisition plate is disposed on the side of the insulating member in the protruding direction near the first surface;

[0010] A thermistor, fixedly connected to the temperature acquisition board and housed within the insulating component; and

[0011] A hot-riveting structure is used to hot-rivet and fix the insulating component and the busbar;

[0012] In the protruding direction, neither the insulating element nor the hot riveting structure is higher than the second surface.

[0013] In some embodiments, the manifold includes a groove and a connecting hole, the groove being recessed in the second surface, and the connecting hole penetrating the bottom surface of the groove and a third surface of the manifold facing the first surface;

[0014] The insulating component includes an ear portion, and the hot riveting structure includes a rivet post. The ear portion is received in the groove, and the rivet post is disposed on the side of the ear portion facing the first surface. The rivet post passes through the connecting hole and rivets and fixes the insulating component and the busbar.

[0015] In the protruding direction, the ear portion is lower than or flush with the second surface.

[0016] In some embodiments, the manifold further includes a mounting channel that extends along the protruding direction through the bottom surface of the groove and the third surface, and through a fourth surface of the manifold that connects the second surface and the third surface;

[0017] The insulating component passes through the mounting channel.

[0018] In some embodiments, the signal acquisition assembly further includes a thermal pad, which is attached to the side of the temperature acquisition plate away from the insulating member and is thermally connected to the first surface.

[0019] In some embodiments, the insulating component includes a potting hole that extends through the protruding direction, the thermistor is located within the potting hole, and the potting hole is filled with thermally conductive adhesive.

[0020] In some embodiments, the signal acquisition component further includes a main sampling board;

[0021] The temperature acquisition board includes a welding section, a buffer section, and an acquisition section. The buffer section is connected to the welding section and the acquisition section at both ends in its extension direction, respectively. The welding section is welded to the main sampling board, and the acquisition section is connected to the insulating component. The thermistor is located in the acquisition section.

[0022] The welding section, the buffer section, and the acquisition section each include a first conductive layer, a second conductive layer, and an insulating film. The insulating film covers the first conductive layer and the second conductive layer. The thermistor is electrically connected to the first conductive layer and the second conductive layer located in the acquisition section.

[0023] In some embodiments, the buffer section includes an arched area that arches along the protruding direction, the arched area being able to stretch and deform in the opposite direction of its arch height when subjected to external force, the deformation direction of the arched area corresponding to the extension direction of the buffer section.

[0024] In some embodiments, the width of the arched region gradually decreases from both ends toward the middle in its deformation direction; and / or,

[0025] The arch height of the arched area is not higher than the second surface in the protruding direction.

[0026] In some embodiments, the insulating film of the welding segment has a row of first hollow areas exposing the first conductive layer and a row of second hollow areas exposing the second conductive layer. The row of first hollow areas and the row of second hollow areas are arranged side by side in the same parallel direction. The first hollow areas and the second hollow areas are arranged alternately in the parallel direction, and their projections along the parallel direction are completely offset or partially intersecting in the width direction of the temperature acquisition plate.

[0027] Secondly, this application provides an electrical device including the battery described in any of the above embodiments, wherein the battery is used to provide electrical energy.

[0028] This application has the following beneficial effects:

[0029] In the aforementioned battery and electrical device, the signal acquisition component acquires and transmits temperature data of individual battery cells through its temperature acquisition board and thermistor. It is mounted on the busbar through an insulating component, and the insulating component and the busbar are fixedly connected by a hot riveting structure, so that the signal acquisition component and the busbar are reliably connected.

[0030] Compared to existing technologies, the busbar, acting as a heat transfer medium between the battery cell and the signal acquisition component, is thermally riveted to the insulator. This ensures that the thermistor can reliably and stably acquire the battery cell's temperature, improving the accuracy of data acquisition by the signal acquisition component. Furthermore, since the insulator and the thermally riveted structure do not extend beyond the second surface of the busbar, the space between the busbar and the battery cell can be effectively utilized for their arrangement, without increasing the battery's vertical space, thus improving space utilization. In addition, using a thermally riveted structure to connect the insulator and busbar is not only economical but also provides a reliable connection. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 A partial structural schematic diagram of a battery according to some embodiments is shown.

[0033] Figure 2 Showing Figure 1 Enlarged view of point A in the middle.

[0034] Figure 3 Showing Figure 1 The diagram shows a partial exploded view of the battery.

[0035] Figure 4 Showing Figure 2 A cross-sectional view of the structure shown.

[0036] Figure 5 Partial schematic diagrams of some embodiments of the bus are shown.

[0037] Figure 6 Showing Figure 2 Another cross-sectional view of the structure shown.

[0038] Figure 7 This is a partial schematic diagram of a signal acquisition component in some embodiments.

[0039] Figure 8 for Figure 7 A perspective view of the structure shown.

[0040] The reference numerals in the detailed embodiments are as follows:

[0041] 100. Battery; X. Protruding direction; Y. Side-by-side direction; 10. Battery cell; S1. First surface; 11. Terminal post; 20. Busbar; S2. Second surface; S3. Third surface; S4. Fourth surface; 21. Groove; 22. Connecting hole; 23. Mounting channel; 30. Signal acquisition component; 31. Insulator; 31a. Ear; 31b. Main body; 31c. Potting hole; 31d. Thermally conductive adhesive; 32. Temperature acquisition board; 32a. Welding section; a1, First hollow area; a2, Second hollow area; 32b, Buffer section; b1, Arched area; 32c, Acquisition section; 32A, First conductive layer; j1, First welding area; 32B, Second conductive layer; j2, Second welding area; 32C, Insulating film; h, Solder hole; 33, Thermistor; 34, Thermal pad; 35, Main sampling plate; 35a, Connecting terminal; 40, Hot riveting structure; 41, Riveting post; 50, Partition; 51, Clearance hole. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] In the description of this application, it should be understood that, where they appear, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, where applicable, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that, if an element is described as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is described as "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] In response to the problems mentioned in the background art, this application provides a battery and an electrical device.

[0049] The battery in this embodiment includes a battery cell. The battery cell can be a secondary battery or a primary battery, and can be a lithium-ion battery, sodium-ion battery, or magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, or other shapes.

[0050] In one embodiment, the battery cell includes a top cover, a housing, and an electrode assembly. The housing and the top cover together form an internal space for accommodating the electrode assembly. Specifically, the housing may have a receiving cavity formed therein, with at least one end open. The top cover closes the open end of the housing to seal the receiving cavity, and the electrode assembly is mounted within the receiving cavity. The housing may be, but is not limited to, a metal housing, such as an aluminum housing or a steel housing.

[0051] Electrode assemblies typically include a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. An electrolyte can be injected into the battery cell, allowing it to penetrate the electrode assembly and provide ion migration pathways for electrochemical reactions, as well as conductivity. Electrode assemblies can be in the form of wound, stacked, or other types. One or more electrode assemblies can be installed within a single battery cell.

[0052] The aforementioned battery can be a battery pack or a battery module. When the battery is a battery pack, the battery pack specifically includes a battery management system (BMS) and multiple battery cells. Multiple battery cells can be electrically connected in series, parallel, or a combination of series and parallel connections, and communicate with the battery management system, which controls and monitors the operating status of each battery cell. Alternatively, multiple battery cells can first be combined with a module management system to form a battery module, and then these battery modules can be electrically connected in series, parallel, or a combination of series and parallel connections to form a battery pack together with the battery management system.

[0053] The battery in this embodiment can be applied to an electrical device to provide power to it. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, etc. Taking a vehicle as an example, the battery can be located at the rear, front, or bottom of the vehicle. The battery can provide power for the vehicle's drive and also for its control system.

[0054] The battery in the embodiments of this application will be described in detail below.

[0055] Figure 1 A partial structural schematic diagram of the battery 100 according to some embodiments is shown. Figure 2 Showing Figure 1 Enlarged view of point A in the middle. Figure 3 Showing Figure 1 A partially exploded view of the battery 100 shown. Figure 4 Showing Figure 2 A cross-sectional view of the structure shown.

[0056] Please combine Figures 1 to 4 The battery 100 proposed in this application embodiment includes a battery cell 10, a busbar 20, a signal acquisition component 30, and a thermal riveting structure 40. The battery cell 10 includes a first surface S1 and a terminal post 11 protruding from the first surface S1. The busbar 20 is electrically connected to the terminal post 11 and is spaced from the first surface S1 in the protrusion direction X of the terminal post 11. The busbar 20 includes a second surface S2 disposed opposite to the first surface S1. The signal acquisition component 30 includes an insulating member 31, a temperature acquisition plate 32, and a thermistor 33. The insulating member 31 is thermally connected to the busbar 20. The temperature acquisition plate 32 is disposed on the side of the insulating member 31 in the protrusion direction X, close to the first surface S1. The thermistor 33 is fixedly connected to the temperature acquisition plate 32 and housed within the insulating member 31. The thermal riveting structure 40 thermally rivets the insulating member 31 and the busbar 20. In the convex direction X, both the insulating element 31 and the hot riveting structure 40 are not higher than the second surface S2.

[0057] Specifically, the battery cell 10 may include a top cover, with a terminal post 11 protruding from the first surface S1 of the top cover. One end of the terminal post 11 is electrically connected to the tab of the electrode assembly in the battery cell 10, and the other end is electrically connected to a busbar 20. In one embodiment, multiple battery cells 10 are stacked, and a terminal post 11 protrudes from the same side of each battery cell 10. Multiple busbars 20 are arranged on the same side of the multiple battery cell 10s with terminal posts 11, and each busbar 20 is electrically connected to at least one terminal post 11, realizing series / parallel connection between the battery cells 10. In practical applications, the protrusion direction X of the terminal post 11 corresponds to the height direction of the battery cell 10. The busbar 20 is usually a busbar, such as an aluminum busbar or a copper busbar.

[0058] The insulating component 31 is insulating and can be made of polymer materials such as polyimide, polyethylene terephthalate, polyethylene, and polypropylene. The temperature sensing plate 32 is located on the side of the insulating component 31 in the aforementioned protruding direction X, near the first surface S1. The thermistor 33, connected to the temperature sensing plate 32, is fixed inside the insulating component 31. The temperature sensing plate 32 and the insulating component 31 can be fixed together by, but is not limited to, adhesive bonding.

[0059] The temperature acquisition board 32 includes an insulating film 32C and a conductive layer, with the insulating film 32C covering the conductive layer. The insulating film 32C can be a PI film layer, a PET film layer, etc. The conductive layer can be a copper foil layer, an aluminum foil layer, a silver foil layer, a wire layer, etc. A thermistor 33 is electrically connected to the conductive layer. The thermistor 33 is used to monitor the temperature of the battery cell 10 in real time and can convert the temperature information into an electrical signal, which is transmitted outward through the conductive layer. The thermistor 33 is fixedly disposed inside the insulating component 31, which protects the thermistor 33.

[0060] The insulating component 31 is installed on the busbar 20 and is thermally connected to the busbar 20. The heat from the pole 11 is transferred through the busbar 20 to the insulating component 31 and the temperature acquisition board 32, and is finally sensed by the thermistor 33.

[0061] The hot-riveting structure 40 is made of thermoplastic and uses it to hot-rivet the insulating component 31 and the busbar 20, ensuring a reliable fixation. Using the hot-riveting structure 40 to connect the insulating component 31 and the busbar 20 is not only economical but also provides a reliable connection, suitable for connecting and fixing non-metallic insulating components 31 and metallic busbar 20.

[0062] In the protruding direction X, neither the insulating member 31 nor the thermally riveted structure 40 is higher than the second surface S2, meaning that the insulating member 31 and the thermally riveted structure 40 do not extend beyond the busbar 20 in this protruding direction X. In this way, the space between the busbar 20 and the first surface S1 can be effectively utilized to arrange the insulating member 31 and the thermally riveted structure 40 without increasing the space of the battery 100 in the height direction. The second surface S2 is typically planar; if the second surface S2 is curved, then the insulating member 31 and the thermally riveted structure 40 will not extend beyond the highest point of the second surface S2 in the protruding direction X.

[0063] In the aforementioned battery 100, the signal acquisition component 30 acquires and transmits temperature data of the battery cell 10 through its temperature acquisition board 32 and thermistor 33. It is mounted on the busbar 20 through the insulating part 31, and the insulating part 31 and the busbar 20 are fixedly connected under the action of the hot riveting structure 40, so that the signal acquisition component 30 and the busbar 20 are reliably connected.

[0064] Compared with existing technologies, the busbar 20, serving as the heat transfer medium between the battery cell 10 and the signal acquisition component 30, is thermally riveted to the insulating component 31, achieving a reliable connection between the signal acquisition component 30 and the busbar 20. This ensures that the thermistor 33 can reliably acquire the temperature of the battery cell 10, improving the accuracy of data acquisition by the signal acquisition component 30. Furthermore, since the insulating component 31 and the thermally riveted structure 40 do not extend beyond the second surface S2 of the busbar 20, the space between the busbar 20 and the battery cell 10 can be effectively utilized to arrange the insulating component 31 and the thermally riveted structure 40, without increasing the vertical space of the battery 100, thus improving the space utilization rate of the battery 100.

[0065] When the insulating member 31 and the busbar 20 are thermally riveted together, there are various solutions to ensure that the height of the insulating member 31 and the thermal riveting structure 40 does not exceed the second surface S2. In one example (not shown), the busbar 20 is generally plate-shaped, and the insulating member 31 is located on one side of the busbar 20 in the extension direction of the temperature acquisition plate 32. The busbar 20 has a connecting portion protruding on this side, and the insulating member 31 is in thermal contact with the connecting portion. Both are provided with through holes for the thermal riveting structure 40 to pass through. The thermal riveting structure 40 passes through the through holes on both the insulating member 31 and the connecting portion in a direction perpendicular to the protrusion direction X, and is thermally riveted at both ends to form mushroom heads, thus fixing the connecting portion to the insulating member 31. In this case, it is easy to ensure that the insulating member 31 and the thermal riveting structure 40 do not exceed the second surface S2 in the aforementioned protrusion direction X. Of course, the solution described in the following embodiments can also be adopted.

[0066] Figure 5 Partial schematic diagrams of the bus 20 in some embodiments are shown.

[0067] In some embodiments, combined with Figure 3 , Figure 4 and Figure 5 The busbar 20 includes a groove 21 and a connecting hole 22. The groove 21 is recessed into the second surface S2, and the connecting hole 22 passes through the bottom surface of the groove 21 and the third surface S3 of the busbar 20 facing the first surface S1. The insulating member 31 includes an ear 31a, and the hot riveting structure 40 includes a rivet post 41. The ear 31a is received in the groove 21, and the rivet post 41 is located on the side of the ear 31a facing the first surface S1. The rivet post 41 passes through the connecting hole 22 and rivets the insulating member 31 and the busbar 20 together. In the convex direction X, the ear 31a is lower than or flush with the second surface S2.

[0068] Understandably, the connecting hole 22 extends along the protruding direction X. The ear portion 31a of the insulating member 31 protrudes along a direction generally parallel to the bottom surface of the groove 21, located at the edge of the insulating member 31, and at the end of the insulating member 31 opposite to the first surface S1. The ear portion 31a is received within the groove 21 and is not positioned above the second surface S2. Specifically, multiple ears 31a may be provided on the insulating member 31, each ear portion 31a corresponding to a different groove 21, or received within the same groove 21.

[0069] Understandably, the insulating component 31 can be made of thermoplastic polymer insulating material and integrally connected to the lug 31a of the insulating component 31 with the riveting post 41, reducing the number of hot riveting operations and improving processing efficiency. Of course, if the material of the insulating component 31 is not suitable for hot riveting, the riveting post 41 and the lug 31a can be connected separately, such as by fastening or snap-fitting.

[0070] Since the rivet post 41 is located on the side of the ear 31a facing the first surface S1, the rivet post 41 will not extend beyond the second surface S2 in the protruding direction X. The rivet post 41 passes through and extends out of the connecting hole 22, and one end of it extending out of the connecting hole 22 is heat-riveted to form a mushroom head. The mushroom head presses the busbar 20 onto the ear 31a, thereby achieving heat-riveting fixation of the insulating component 31 and the busbar 20.

[0071] When installing the insulating component 31, the rivet post 41 is inserted into the connecting hole 22 from top to bottom. During this process, the ear 31a is gradually received into the groove 21. When the ear 31a contacts the bottom surface of the groove 21, the insulating component 31 is installed in place, and one end of the rivet post 41 extends out of the connecting hole 22. A mushroom head can be machined on this end.

[0072] Thus, the installation efficiency of the insulating part 31 and the busbar 20 is improved through the cooperation of the ear 31a, the groove 21, the connecting hole 22 and the rivet post 41.

[0073] In some embodiments, combined with Figure 2 , Figure 3 and Figure 5 It is understood that the busbar 20 also includes a mounting channel 23, which penetrates the bottom surface of the groove 21 and the third surface S3 along the protruding direction X, and also penetrates the fourth surface S4 of the busbar 20 that connects the second surface S2 and the third surface S3. The insulating member 31 passes through the mounting channel 23.

[0074] Specifically, the insulating member 31 includes a main body 31b and the aforementioned ear portion 31a. The ear portion 31a protrudes from the edge of the main body 31b and is located at the end of the main body 31b facing away from the first surface S1. The temperature sensing plate 32 is located at the end of the main body 31b facing the first surface S1. The mounting channel 23 can be understood as a notch provided on the fourth surface S4. This notch passes through the busbar 20 in the protruding direction X. The direction of the busbar 20 on the fourth surface S4 roughly corresponds to the extension direction of the temperature sensing plate 32. At this time, the notch-shaped mounting channel 23 can avoid the temperature sensing plate 32.

[0075] At this time, the main body 31b is inserted into the installation channel 23, and the ear 31a is received in the groove 21. In this way, the internal space of the busbar 20 is used to accommodate the insulating member 31, which reduces the space occupied by the insulating member 31 and makes the battery 100 structure more compact.

[0076] Understandably, the main body 31b does not extend beyond the second surface S2 of the busbar 20 in the protruding direction X. Understandably, when the main body 31b passes through the mounting channel 23, it may not contact the inner wall of the mounting channel 23. Preferably, the main body 31b makes thermally conductive contact with the inner wall of the mounting channel 23, increasing the thermally conductive area between the insulating member 31 and the busbar 20, thus making the temperature collected by the thermistor 33 more accurate.

[0077] In some embodiments, combined with Figure 2 and Figure 4 It is understood that the signal acquisition component 30 also includes a thermal pad 34, which is attached to the side of the temperature acquisition plate 32 away from the insulating member 31 and is thermally connected to the first surface S1.

[0078] The thermal pad 34 can be made of flexible materials such as rubber or silicone. It can be pressed between the temperature acquisition plate 32 and the first surface S1, ensuring full contact between the temperature acquisition plate 32 and the first surface S1. This allows the heat inside the battery cell 10 to be transferred to the temperature acquisition plate 32 via the first surface S1 and the thermal pad 34. Of course, the thermal pad 34 can also be made of other rigid materials.

[0079] At this time, a thermal pad 34 is placed between the temperature acquisition plate 32 and the first surface S1. The thermal pad 34 increases the heat transfer path from the battery cell 10 to the thermistor 33, enabling the thermistor 33 to acquire the temperature of the battery cell 10 more accurately and improving the acquisition accuracy of the signal acquisition component 30.

[0080] Moreover, the thermal pad 34 can provide a force to press the temperature acquisition plate 32 onto the insulating component 31. Even if the temperature acquisition plate 32 and the insulating component 31 are not connected by adhesive bonding, fastening or other means, reliable thermal contact between the temperature acquisition plate 32 and the insulating component 31 can be maintained, which reduces the processing cost of the battery 100 and improves the production efficiency of the battery 100.

[0081] Figure 6 Showing Figure 2 Another cross-sectional view of the structure shown.

[0082] In some embodiments, combined with Figure 2 , Figure 4 and Figure 6 It is understood that the insulating component 31 includes a potting hole 31c, which is disposed through the component in the protruding direction X. The thermistor 33 is located inside the potting hole 31c, which is filled with thermally conductive adhesive 31d.

[0083] Specifically, a potting hole 31c is formed within the main body portion 31b, and the potting hole 31c extends through the main body portion 31b along the protruding direction X. A thermistor 33 extends into the potting hole 31c from below, and thermally conductive adhesive 31d can be injected into the potting hole 31c from above. Heat from the temperature sensing plate 32 and the insulating component 31 is transferred to the thermistor 33 via the thermally conductive adhesive 31d, and is sensed by the thermistor 33.

[0084] At this time, the thermally conductive adhesive 31d can make the temperature sensed by the thermistor 33 more uniform and also plays a role in fixing the thermistor 33.

[0085] Figure 7 This is a partial schematic diagram of the signal acquisition component 30 in some embodiments. Figure 8 for Figure 7 A perspective view of the structure shown.

[0086] In some embodiments, combined with Figure 2 , Figure 7 and Figure 8 The signal acquisition component 30 also includes a main sampling board 35. The temperature acquisition board 32 includes a welding section 32a, a buffer section 32b, and an acquisition section 32c. The buffer section 32b is connected to the welding section 32a and the acquisition section 32c at both ends in its extension direction, respectively. The welding section 32a is welded to the main sampling board 35, and the acquisition section 32c is connected to the insulating component 31. A thermistor 33 is disposed in the acquisition section 32c. The welding section 32a, the buffer section 32b, and the acquisition section 32c each include a first conductive layer 32A, a second conductive layer 32B, and an insulating film 32C. The insulating film 32C covers the first conductive layer 32A and the second conductive layer 32B. The thermistor 33 is electrically connected to the first conductive layer 32A and the second conductive layer 32B located in the acquisition section 32c.

[0087] The main sampling board 35 can be a flexible circuit board, a flat flexible cable, etc. When multiple battery cells 10 are stacked, the extension direction of the main sampling board 35 is consistent with the stacking direction of the battery cells 10. At least one side of the main sampling board 35 in the width direction is provided with multiple temperature acquisition boards 32 arranged sequentially along the extension direction of the main sampling board 35. The first conductive layer 32A and the second conductive layer 32B in the welding section 32a of each temperature acquisition board 32 are welded to the main sampling board 35. The acquisition section 32c of each temperature acquisition board 32 is thermally connected to the busbar 20 via a corresponding insulating component 31. The main sampling board 35 is provided with connection terminals 35a, and the data collected by the temperature acquisition boards 32 is transmitted to the battery management system or the module management system through its connection terminals 35a.

[0088] Understandably, the conductive layer within the temperature acquisition plate 32 includes a first conductive layer 32A and a second conductive layer 32B. An insulating film 32C covers the first conductive layer 32A and the second conductive layer 32B and electrically isolates them. The insulating film 32C can be a PI film, a PET film, etc. Specifically, the first conductive layer 32A is electrically connected to the positive terminal of the thermistor 33 through its portion located in the acquisition section 32c, and the second conductive layer 32B is electrically connected to the negative terminal of the thermistor 33 through its portion located in the acquisition section 32c. The first conductive layer 32A, the thermistor 33, the second thermally conductive layer, the main sampling plate 35, and the external battery management system or module management system constitute a conductive circuit.

[0089] In practical applications, the battery cell 10 expands, changing its position relative to the main sampling plate 35. A buffer section 32b, connected between the welding section 32a and the acquisition section 32c, can deform in the extension direction and / or width direction of the temperature acquisition plate 32 to accommodate the positional change between the battery cell 10 and the main sampling plate 35, reducing the risk of detachment or breakage at the weld between the temperature acquisition plate 32 and the main sampling plate 35. Specifically, the buffer section 32b can be S-shaped, C-shaped, double S-shaped, double C-shaped, etc.

[0090] In one specific embodiment, the main sampling board 35 is a flat, flexible cable, specifically including multiple conductors extending along its longitudinal direction. These conductors are spaced apart along the width direction of the main sampling board 35, and an insulating layer covers the outside of each conductor to electrically isolate them. The first conductive layer 32A and the second conductive layer 32B are respectively soldered to different conductors. The insulating layer and the aforementioned insulating film 32C can be made of the same material.

[0091] In some embodiments, refer to Figure 6 and Figure 7The buffer section 32b includes an arched area b1 that arches along the aforementioned protruding direction X. When subjected to external force, the arched area b1 can be stretched and deformed away from its arch height. The deformation direction of the arched area b1 corresponds to the extension direction of the buffer section 32b.

[0092] Specifically, the buffer section 32b extends to connect the welding section 32a and the acquisition section 32c at both ends, and its extension direction can be a straight line or a curve. The arched area b1 arches along the protrusion direction X, roughly in the shape of a semi-circle, U-shape, or C-shape. The arch height of the arched area b1 is the end of it that protrudes away from the welding section 32a or the acquisition section 32c in the aforementioned protrusion direction X, roughly located in its middle position. When the buffer section 32b deforms under the action of external forces such as the expansion force generated when the battery cell 10 expands, the arched area b1 can be stretched and deformed away from the arch height or squeezed and deformed towards its arch height.

[0093] At this point, an arched area b1 is formed on the buffer section 32b to support its buffer deformation. The structure is simple and easy to implement.

[0094] It should be noted that one or more arched areas b1 can be provided on the buffer section 32b. When multiple arched areas b1 are provided, the arching direction of each arched area b1 can be the same or opposite. In one example, the arching directions of every two adjacent arched areas b1 are opposite, and the buffer section 32b is roughly wavy. If the extension direction of the buffer section 32b is a straight line, the deformation direction of each arched area b1 is basically the same. If the extension direction of the buffer section 32b is a curved direction, the deformation direction of some or all of the arched areas b1 can be different.

[0095] Preferably, the arched region b1 arches away from the first surface S1 along the convex direction X. When the arched region b1 is deformed by external force, its arch height will change. At this time, the arch height of the arched region b1 is away from the first surface S1, and its deformation space is not limited by the first surface S1, resulting in a larger deformation range for the arched region b1. Of course, the arched region b1 can also arch towards the first surface S1, as long as sufficient deformation space is ensured between the first surface S1 and the arch height.

[0096] In some embodiments, combined with Figure 8 It is understood that the width W of the arched region b1 gradually decreases from both ends toward the middle in its deformation direction.

[0097] The width W of the arched region b1 refers to the dimension of the arched region b1 in its width direction, which is approximately perpendicular to its deformation direction. The width of the arched region b1 is smaller closer to the middle position, and the minimum width of the arched region b1 is located in its middle position, that is, the width of the arched region b1 is the smallest at the arch height.

[0098] At this time, the width of the middle part of the arched area b1 is relatively small. When the arched area b1 is compressed and deformed, the resistance provided by the arch height is relatively small, which makes the deformation response of the arched area b1 more rapid when it is compressed.

[0099] In some embodiments, combined with Figure 6 It is understood that the arch height of the arched region b1 is not higher than the second surface S2 in the convex direction X.

[0100] Specifically, if the arched area b1 arches towards the first surface S1, its arch height must not exceed the second surface S2. If the arched area b1 arches away from the first surface S1, its arch height must be appropriate and cannot exceed the second surface S2. The arch height of the arched area b1 can be flush with the second surface S2.

[0101] Understandably, if the arched area b1 arches away from the first surface S1, the highest position of the temperature acquisition plate 32 is basically located at the arch height of the arched area b1. At this time, it is required that the arch height is not higher than the second surface S2. The temperature acquisition plate 32 makes full use of the space occupied by the busbar 20 in the height direction of the battery 100, which can improve the space utilization rate of the battery 100 in its height direction.

[0102] In some embodiments, refer to Figure 7 and Figure 8 The insulating film 32C of the welding section 32a has a row of first hollow areas a1 exposing the first conductive layer 32A and a row of second hollow areas a2 exposing the second conductive layer 32B. The row of first hollow areas a1 and the row of second hollow areas a2 are arranged parallel to each other in the same parallel direction Y. The first hollow areas a1 and the second hollow areas a2 are arranged alternately in the parallel direction Y, and their projections along the parallel direction Y onto the width of the temperature acquisition plate 32 are completely offset or partially intersecting.

[0103] The width direction of the temperature acquisition plate 32 is approximately perpendicular to the parallel direction Y, which is approximately consistent with the extension direction (i.e., the longitudinal direction) of the temperature acquisition plate 32. The portion of the first conductive layer 32A exposed by the first cutout area a1 is called the first welding area j1, and the portion of the second conductive layer 32B exposed by the second cutout area a2 is called the second welding area j2. In practical applications, the first welding area j1 is welded to the main sampling plate 35, and the second welding area j2 is welded to the main sampling plate 35. The cutout areas facilitate the welding of each welding area to the main sampling plate 35.

[0104] The row of first hollow areas a1 creates multiple first welding areas j1 on the first conductive layer 32A. In practical applications, the main sampling board 35 can be welded to multiple temperature acquisition boards 32, and the first conductive layer 32A of each temperature acquisition board 32 can be welded to the main sampling board 35 by selecting one of the first welding areas j1. Similarly, the row of second hollow areas a2 creates multiple second welding areas j2 on the second conductive layer 32B, and the second conductive layer 32B of each temperature acquisition board 32 can be welded to the main sampling board 35 by selecting one of the second welding areas j2. In this way, all temperature acquisition boards 32 can be mass-produced to uniform specifications, reducing costs.

[0105] The projections of each first cutout area a1 along the parallel direction Y are basically coincident, and the projections of each second cutout area a2 along the parallel direction Y are basically coincident. The projections of the first cutout area a1 along the parallel direction Y and the projections of the second cutout areas along the parallel direction Y are completely offset or partially intersecting (i.e. partially offset) in the width direction of the temperature acquisition plate 32. This allows the soldering areas on each temperature acquisition plate 32 that are connected to the positive terminal of the thermistor 33 and the soldering areas that are connected to the negative terminal of the thermistor 33 to be effectively distinguished in position. This has a foolproof effect and helps to reduce the risk of short circuits caused by soldering errors.

[0106] It is worth noting that when the projections of the first cutout area a1 and the second cutout area a2 along the aforementioned parallel direction Y partially intersect in the width direction of the temperature sensing plate 32 (not shown), it is beneficial to reduce the width dimension of the temperature sensing plate 32, making the structure of the temperature sensing plate 32 more compact. When the projections of the first cutout area a1 and the second cutout area a2 along the aforementioned parallel direction Y are completely offset in the width direction of the temperature sensing plate 32 (e.g., Figure 8 As shown, this helps to improve the strength of the temperature acquisition plate 32 and simplifies the manufacturing of the temperature acquisition plate 32.

[0107] Optionally, refer to Figure 8 Each cutout area (including the first cutout area a1 and the second cutout area a2) typically does not extend beyond the corresponding conductive layer, ensuring that the conductive layer near each cutout area is covered and fixed by the insulating film 32C. This prevents the edges of the conductive layer from being exposed by the cutout area, which helps to improve the tensile strength of the conductive layer and prevents it from warping. Of course, in other embodiments, each cutout area may also expose part of the edge of the corresponding conductive layer.

[0108] Optionally, the first cutout area a1 exposes both sides of the first conductive layer 32A in the thickness direction (corresponding to the protrusion direction X) of the temperature acquisition plate 32, and the second cutout area a2 exposes both sides of the second conductive layer 32B in the thickness direction (corresponding to the protrusion direction X) of the temperature acquisition plate 32. Further optionally, solder holes h are provided in the first welding area j1 and the second welding area j2. Solder flows through the solder holes h between each welding area and the main sampling plate 35 to achieve welding between each welding area and the main sampling plate 35. Solder is retained in the solder holes h, which can strengthen the welding strength between the welding area and the main sampling plate 35. Providing multiple solder holes h in each welding area not only improves welding efficiency but also further enhances welding strength.

[0109] As long as the solutions in the above embodiments do not conflict, they can be freely combined to obtain more embodiments.

[0110] Furthermore, the electrical device proposed in this application includes the battery 100 of any of the above embodiments, and the battery 100 is used to provide electrical energy. This electrical device includes all the beneficial effects mentioned above.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery (100), characterized in that, include: A battery cell (10) includes a first surface (S1) and an electrode post (11) protruding from the first surface (S1); The busbar (20) is electrically connected to the pole (11) and is spaced from the first surface (S1) in the protruding direction (X) of the pole (11). The busbar (20) includes a second surface (S2) disposed away from the first surface (S1). Signal acquisition component (30), including: The insulating component (31) is thermally connected to the busbar (20); Temperature acquisition plate (32) is disposed on the side of the insulating member (31) in the protruding direction (X) near the first surface (S1); A thermistor (33) is fixedly connected to the temperature acquisition board (32) and housed within the insulating member (31); and A hot-riveting structure (40) is used to hot-rivet the insulating component (31) and the busbar (20); In the protruding direction (X), both the insulating member (31) and the hot riveting structure (40) are not higher than the second surface (S2).

2. The battery (100) according to claim 1, characterized in that, The manifold (20) includes a groove (21) and a connecting hole (22). The groove (21) is recessed in the second surface (S2), and the connecting hole (22) passes through the bottom surface of the groove (21) and the third surface (S3) of the manifold (20) facing the first surface (S1). The insulating component (31) includes an ear (31a), and the hot riveting structure (40) includes a rivet post (41). The ear (31a) is received in the groove (21), and the rivet post (41) is provided on the side of the ear (31a) facing the first surface (S1). The rivet post (41) passes through the connecting hole (22) and rivets the insulating component (31) and the busbar (20) together. In the protruding direction (X), the ear (31a) is lower than or flush with the second surface (S2).

3. The battery (100) according to claim 2, characterized in that, The manifold (20) further includes an installation channel (23), which extends along the protruding direction (X) through the bottom surface of the groove (21) and the third surface (S3), and through the fourth surface (S4) of the manifold (20) that connects the second surface (S2) and the third surface (S3); The insulating element (31) passes through the mounting channel (23).

4. The battery (100) according to claim 1, characterized in that, The signal acquisition component (30) further includes a thermal pad (34), which is attached to the side of the temperature acquisition plate (32) away from the insulating member (31) and is thermally connected to the first surface (S1).

5. The battery (100) according to claim 1, characterized in that, The insulating component (31) includes a potting hole (31c), which is disposed through the protrusion direction (X). The thermistor (33) is located inside the potting hole (31c), and the potting hole (31c) is filled with thermally conductive adhesive (31d).

6. The battery (100) according to claim 1, characterized in that, The signal acquisition component (30) also includes a main sampling board (35); The temperature acquisition board (32) includes a welding section (32a), a buffer section (32b), and an acquisition section (32c). The buffer section (32b) is connected to the welding section (32a) and the acquisition section (32c) at both ends of its extension direction, respectively. The welding section (32a) is welded to the main sampling board (35), and the acquisition section (32c) is connected to the insulating component (31). The thermistor (33) is located in the acquisition section (32c). The welding section (32a), the buffer section (32b), and the acquisition section (32c) each include a first conductive layer (32A), a second conductive layer (32B), and an insulating film (32C). The insulating film (32C) covers the first conductive layer (32A) and the second conductive layer (32B). The thermistor (33) is electrically connected to the first conductive layer (32A) and the second conductive layer (32B) located in the acquisition section (32c).

7. The battery (100) according to claim 6, characterized in that, The buffer section (32b) includes an arched area (b1) that arches along the protruding direction (X). The arched area (b1) can be stretched and deformed in the opposite direction of its arch height when subjected to external force. The deformation direction of the arched area (b1) corresponds to the extension direction of the buffer section (32b).

8. The battery (100) according to claim 7, characterized in that, The width (W) of the arched region (b1) gradually decreases from both ends toward the middle in its deformation direction; and / or, The arch height of the arched area (b1) is not higher than the second surface (S2) in the protruding direction (X).

9. The battery (100) according to claim 6, characterized in that, The insulating film (32C) of the welding section (32a) has a row of first hollow areas (a1) exposing the first conductive layer (32A) and a row of second hollow areas (a2) exposing the second conductive layer (32B). The row of first hollow areas (a1) and the row of second hollow areas (a2) are arranged side by side in parallel with the same parallel direction (Y). The first hollow areas (a1) and the second hollow areas (a2) are arranged alternately in the parallel direction (Y), and their projections along the parallel direction (Y) are completely offset or partially intersecting in the width direction of the temperature acquisition plate.

10. An electrical device, characterized in that, Includes a battery (100) as described in any one of claims 1-9, the battery (100) being used to provide electrical energy.

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