Top cover assembly, battery cell and battery pack

Abstract

A top cover assembly, a battery cell and a battery pack. The top cover assembly comprises: a top cover (100), a positive terminal post (200), a negative terminal post (300), a first conductor (400), a second conductor (500) and a slave board (600). The top cover (100) has a first surface (110); the positive terminal post (200) and the negative terminal post (300) are both connected to the top cover (100); one end of the first conductor (400) is electrically connected to the positive terminal post (200), and the other end thereof is exposed from the top cover (100) to form a first connecting end (410); one end of the second conductor (500) is electrically connected to the negative terminal post (300), and the other end thereof is exposed from the top cover (100) to form a second connecting end (510); a first pad (610) and a second pad (620) are provided on a surface of the slave board (600); the slave board (600) is snap-fitted to the top cover (100); the first pad (610) abuts against the first connecting end (410); and the second pad (620) abuts against the second connecting end (510). Therefore, during an assembly process, the slave board (600) can be directly snap-fitted to the top cover (100), and the first pad (610) and the second pad (620) respectively abut against the first connecting end (410) and the second connecting end (510), without the need for welding the slave board (600) to the first conductor (400) and welding the slave board (600) to the second conductor (500), thus improving the assembly efficiency of the top cover assembly.

Description

Top cover assembly, individual battery cells and battery pack

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202420919801.7, filed on April 25, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a top cover assembly, a single cell, and a battery pack. Background Technology

[0004] In related technologies, a slave plate is set on the top cover of the battery, and a corresponding chip is set on the slave plate. The slave plate is connected to the terminal post through wires to collect information of the single cell, such as voltage, current and electrochemical impedance spectroscopy (EIS). However, due to the small size of the slave plate, its installation and welding are more troublesome, resulting in low assembly efficiency, which is not conducive to mass production. Summary of the Invention

[0005] This application aims to solve at least one of the technical problems existing in the related art. To this end, this application proposes a top cover assembly with high assembly efficiency.

[0006] This application also provides a single-cell battery including the aforementioned top cover assembly.

[0007] This application also provides a battery pack including the aforementioned individual cells.

[0008] A top cover assembly according to a first aspect embodiment of the present application includes: a top cover, a positive terminal, a negative terminal, a first conductor, a second conductor, and a slave plate.

[0009] The top cover has a first surface. The positive terminal is connected to the top cover for electrical connection with the cathode plate of the single cell. The negative terminal is connected to the top cover for electrical connection with the anode plate of the single cell. One end of the first conductor is electrically connected to the positive terminal, and the other end protrudes from the first surface of the top cover to form a first connection end. One end of the second conductor is electrically connected to the negative terminal, and the other end protrudes from the first surface of the top cover to form a second connection end. The surface of the slave board has a first pad and a second pad. The slave board is snapped onto the top cover. The first pad abuts against the first connection end, and the second pad abuts against the second connection end.

[0010] The top cover assembly according to the embodiments of this application has at least the following beneficial effects:

[0011] In this embodiment, the slave board is snapped onto the top cover, and the first and second pads on the slave board abut against the first and second connection ends, respectively. Therefore, during the assembly of the top cover assembly in this embodiment, the slave board can be directly snapped onto the top cover, and the first and second pads abut against the first and second connection ends, respectively, thereby completing the power supply to the slave board without the need to solder between the slave board and the first conductor, or between the slave board and the second conductor. This makes the installation of the slave board simpler and improves the assembly efficiency of the top cover assembly in this embodiment.

[0012] According to some embodiments of this application, the top cover also has a first connecting hole and a second connecting hole, both of which penetrate the top cover along the thickness direction. The first conductor passes through the first connecting hole, and the second conductor passes through the second connecting hole.

[0013] According to some embodiments of this application, the first conductor includes a first connecting wire and a first post. The first post has a first connecting end. The first post passes through and is snapped into the first connecting hole. One end of the first connecting wire is electrically connected to the positive terminal post, and the other end is electrically connected to the end of the first post opposite to the first connecting end; and / or,

[0014] The second conductor includes a second connecting wire and a second post. The second post has a second connecting end. The second post passes through and is snapped into the second connecting hole. One end of the second connecting wire is electrically connected to the negative terminal post, and the other end is electrically connected to the end of the second post opposite to the second connecting end.

[0015] According to some embodiments of this application, the first column includes a first snap-fit ​​portion, a first elastic portion, and a first abutting portion. The first snap-fit ​​portion snaps into the first connecting hole. One end of the first elastic portion is connected to the first snap-fit ​​portion, and the other end is connected to the first abutting portion. The end of the first abutting portion opposite to the first snap-fit ​​portion is a first connecting end; and / or,

[0016] The second column includes a second snap-fit ​​portion, a second elastic portion, and a second abutment portion. The second snap-fit ​​portion snaps into the second connecting hole. One end of the second elastic portion is connected to the second snap-fit ​​portion, and the other end is connected to the second abutment portion. The end of the second abutment portion opposite to the second snap-fit ​​portion is the second connecting end.

[0017] According to some embodiments of this application, the first connecting line is an FDC flexible flat cable; and / or,

[0018] The second connecting line is an FDC flexible flat cable.

[0019] According to some embodiments of this application, the top cover also has a groove and a slot communicating with the groove, the slot being located on the first surface, the shape and size of the groove being adapted to the slave plate, the slave plate being able to extend into the slot and engage with the groove, and the slave plate not protruding from the groove.

[0020] According to some embodiments of this application, the top cover assembly further includes structural adhesive that fills the groove.

[0021] According to some embodiments of this application, the structural adhesive is a polyurethane structural adhesive, an acrylic structural adhesive, or a silicone adhesive.

[0022] According to some embodiments of this application, the slave board includes an EIS chip, and the slave board has two first pads and two second pads;

[0023] Two of each of the first and second conductors are provided. One end of each of the two first conductors is electrically connected to the positive terminal, and the other end abuts against the two first pads, respectively. One end of each of the two second conductors is electrically connected to the negative terminal, and the other end abuts against the two second pads, respectively; or...

[0024] The first conductor includes a first conductor portion and two second conductor portions. One end of each of the two second conductor portions abuts against the two first pads, and the other end is connected to the first conductor portion. The first conductor portion is electrically connected to the positive terminal. The second conductor includes a third conductor portion and two fourth conductor portions. One end of each of the two fourth conductor portions abuts against the two second pads, and the other end is connected to the third conductor portion. The third conductor portion is electrically connected to the negative terminal.

[0025] According to some embodiments of this application, the top cover assembly further includes an explosion-proof valve connected to the top cover;

[0026] The slave plate is located between the explosion-proof valve and the positive terminal, and the two second solder pads are spaced apart along the width direction of the top cover; or,

[0027] The slave plate is located between the explosion-proof valve and the negative terminal, and the two first solder pads are spaced apart along the width direction of the top cover.

[0028] According to some embodiments of this application, the top cover assembly further includes a first insulating sleeve and a second insulating sleeve;

[0029] The first insulating sleeve is fitted over the outside of the first column and located inside the first connecting hole to isolate the first column from the top cover; and

[0030] The second insulating sleeve is fitted between the second column and the top cover.

[0031] According to some embodiments of this application, the slave board includes a PCB substrate, capacitors, resistors, and chips, etc., and the components are connected to the PCB substrate by surface mount or pins.

[0032] According to some embodiments of this application, the position of the first connection end can be adaptively adjusted according to the position of the first pad, so that while the first pad abuts against the first connection end, the second pad abuts against the first connection end.

[0033] A single-cell battery according to a second aspect of this application includes: a casing, a cell, and a top cover assembly as described in the first aspect of this application.

[0034] The housing has a receiving cavity and an opening communicating with the receiving cavity. The battery cell is disposed in the receiving cavity. The battery cell includes a cathode plate and an anode plate. The top cover is connected to the housing and seals the opening. The positive terminal is electrically connected to the cathode plate, and the negative terminal is electrically connected to the anode plate.

[0035] The single-cell battery according to the embodiments of this application has at least the following beneficial effects:

[0036] In the top cover assembly of the first aspect embodiment, the slave board in the top cover assembly is snapped onto the top cover, and the first and second pads on the slave board abut against the first and second connection ends, respectively. Therefore, during the assembly of the top cover assembly, the slave board can be directly snapped onto the top cover, and the first and second pads abut against the first and second connection ends, respectively, thereby completing the power supply to the slave board without the need to solder between the slave board and the first conductor, or between the slave board and the second conductor. This makes the installation of the slave board simpler, thereby improving the assembly efficiency of the single cell in this embodiment.

[0037] A battery pack according to a third aspect embodiment of this application includes: a single battery cell according to a second aspect embodiment.

[0038] The battery pack according to the embodiments of this application has at least the following beneficial effects:

[0039] In the single-cell battery of the second aspect embodiment, the slave board in the single-cell battery is snapped onto the top cover, and the first and second pads on the slave board abut against the first and second connection ends, respectively. Therefore, during the assembly process of the single-cell battery, the slave board can be directly snapped onto the top cover, and the first and second pads abut against the first and second connection ends, respectively, thereby completing the power supply to the slave board without the need to solder between the slave board and the first conductor, or between the slave board and the second conductor. This makes the installation of the slave board simpler and improves the assembly efficiency of the battery pack in this embodiment.

[0040] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0041] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0042] Figure 1 is a structural schematic diagram of the top cover assembly according to the first aspect of this application;

[0043] Figure 2 is a schematic diagram of Figure 1 from another perspective;

[0044] Figure 3 is another schematic diagram of Figure 1;

[0045] Figure 4 is a schematic diagram of the top cover, positive electrode post and first conductor in Figure 3;

[0046] Figure 5 is another structural schematic diagram of the top cover, positive terminal post and first conductor in Figure 3;

[0047] Figure 6 is a schematic diagram of the structure of a single cell according to a second aspect embodiment of this application.

[0048] Figure label:

[0049] Top cover 100, first surface 110, first connecting hole 120, second connecting hole 130, second surface 140, groove 150, slot 151;

[0050] Positive terminal 200, negative terminal 300;

[0051] The first conductor 400, the first connecting end 410, the first connecting line 420, the first pillar 430, the first snap-fit ​​part 431, the first elastic part 432, and the first abutting part 433.

[0052] Second conductor 500, second connection terminal 510;

[0053] From board 600, first pad 610, second pad 620;

[0054] Explosion-proof valve 700, housing 800. Detailed Implementation

[0055] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0056] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0057] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0058] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0059] In related technologies, a slave board (such as a PCB board) is set on the top cover of the battery. The slave board has corresponding chips and is connected to the terminal post by wires to collect information of the individual cells, such as voltage, current and electrochemical impedance spectroscopy. However, due to the small size of the slave board, its installation and soldering are more troublesome, resulting in low assembly efficiency and making it unsuitable for mass production.

[0060] Based on the above problems, the first aspect of this application proposes a top cover assembly to improve assembly efficiency. Referring to Figures 1 to 3, Figure 1 is a structural schematic diagram of the top cover assembly of the first aspect of this application, Figure 2 is a schematic diagram of Figure 1 from another perspective, and Figure 3 is another schematic diagram of Figure 1. The top cover assembly of this embodiment includes: a top cover 100, a positive terminal post 200, a negative terminal post 300, a first conductor 400, a second conductor 500, and a slave plate 600.

[0061] The top cover 100 has a first surface 110. A positive terminal 200 is connected to the top cover 100 for electrical connection with the cathode of a single cell, and a negative terminal 300 is connected to the top cover 100 for electrical connection with the anode of a single cell. One end of a first conductor 400 is electrically connected to the positive terminal 200, and the other end protrudes from the first surface 110 of the top cover 100, forming a first connection end 410 (as shown in Figure 3). One end of a second conductor 500 is electrically connected to the negative terminal 300, and the other end protrudes from the first surface 110 of the top cover 100, forming a second connection end 510 (as shown in Figure 3). The surface of the slide plate 600 has a first pad 610 and a second pad 620. The slide plate 600 is snapped onto the first surface 110 of the top cover 100 by a structure such as a snap or a slot. The first pad 610 abuts against the first connection end 410, and the second pad 620 abuts against the second connection end 510. For example, the slave board 600 includes a PCB substrate, capacitors, resistors, and chips. The PCB substrate is snapped onto the top cover 100, and the components are connected to the PCB substrate via surface mount or pins. The first conductor 400 and the second conductor 500 can be any conductive structure such as wires, copper busbars, or aluminum busbars. Depending on the detection requirements, the chip can be an EIS chip or a voltage chip. Therefore, when the top cover assembly in this embodiment is used for a single cell, after the first pad 610 and the second pad 620 are connected to the positive terminal 200 and the negative terminal 300 respectively through the first conductor 400 and the second conductor 500, power can be supplied to the components on the slave board 600, thereby enabling the detection of one or more of the voltage, current, or electrochemical impedance spectroscopy in the single cell.

[0062] Specifically, in this embodiment, the slave plate 600 is snapped onto the top cover 100, and the first pad 610 and the second pad 620 on the slave plate 600 abut against the first connection end 410 and the second connection end 510, respectively. Therefore, during the assembly of the top cover assembly in this embodiment, the slave plate 600 can be directly snapped onto the top cover 100, and the first pad 610 and the second pad 620 can abut against the first connection end 410 and the second connection end 510, respectively, thereby completing the power supply to the slave plate 600 without the need to solder between the slave plate 600 and the first conductor 400, or between the slave plate 600 and the second conductor 500. This makes the installation of the slave plate 600 simpler, thereby improving the assembly efficiency of the top cover assembly in this embodiment.

[0063] It should be noted that when the slave board 600 includes an EIS chip, there are two first pads 610 and two second pads 620, thereby meeting the four-wire requirement for EIS chip acquisition. Specifically, for example, in some embodiments, the slave board 600 includes an EIS chip, has two first pads 610 and two second pads 620, and has two first conductors 400 and two second conductors 500. One end of each of the two first conductors 400 is electrically connected to the positive terminal 200, and the other end is respectively abutted against the two first pads 610. One end of each of the two second conductors 500 is electrically connected to the negative terminal 300, and the other end is respectively abutted against the two second pads 620, thereby meeting the four-wire requirement of the EIS chip, so that when the top cover assembly of this embodiment is used for a single battery cell, the EIS of the single battery cell can be detected.

[0064] Furthermore, based on the above embodiments, the first conductor 400 includes a first conductor portion and two second conductor portions. One end of each of the two second conductor portions abuts against two first solder pads 610, and the other end is connected to the first conductor portion. The first conductor portion is electrically connected to the positive electrode post 200. The second conductor 500 includes a third conductor portion and two fourth conductor portions. One end of each of the two fourth conductor portions abuts against two second solder pads 620, and the other end is connected to the third conductor portion. The third conductor portion is electrically connected to the negative electrode post 300. Therefore, during the assembly process, only one soldering is required between the positive electrode post 200 and the negative electrode post 300, resulting in higher single-cell battery assembly efficiency in this embodiment. Specifically, taking the first conductor 400 as an example, as in the above embodiment, when two first conductors 400 are used, during assembly, it is necessary to electrically connect the two first conductors 400 to the positive terminal 200 respectively. However, in this embodiment, the first conductor 400 includes a first conductor portion and two second conductor portions, which are connected to the positive terminal 200 through a first conductor portion. Therefore, during assembly, only one soldering is required between the positive terminal 200 and the first conductor 400 to meet the four-wire requirement of the EIS chip, thereby making the assembly efficiency of the top cover assembly in this embodiment higher. The second conductor 500 is similar and will not be described in detail here.

[0065] Referring to Figures 2 and 3, in some embodiments, the top cover 100 also has a first connection hole 120 and a second connection hole 130 (as shown in Figure 3). The first connection hole 120 and the second connection hole 130 both penetrate the top cover 100 along the thickness direction of the top cover 100. The first conductor 400 passes through the first connection hole 120, and the second conductor 500 passes through the second connection hole 130. Specifically, taking the first conductor 400 as an example, the first conductor 400 is inserted through the first connection hole 120. That is, one end of the first conductor 400 is exposed from the first connection hole 120 to form the first connection end 410, and the other end extends along the top cover 100 from the first surface 110 to the opposite surface (the second surface 140 in FIG2) to the positive electrode post 200 and is welded to the positive electrode post 200. Therefore, when the top cover assembly of this embodiment is used in a single battery, the first conductor 400 can be located inside the single battery. This not only reduces the impact of external interference on signal transmission to improve the stability and reliability of the battery management system, but also makes the single battery more compact to improve the energy density of the single battery.

[0066] Referring to Figure 4, which is a schematic diagram of the top cover, positive terminal, and first conductor in Figure 3, based on the above embodiment, the first conductor 400 includes a first connecting line 420 and a first post 430. The first post 430 has a first connecting end 410, which passes through and is engaged in the first connecting hole 120. One end of the first connecting line 420 is electrically connected to the positive terminal 200, and the other end is electrically connected to the end of the first post 430 opposite to the first connecting end 410. Specifically, it is known that bending may impair the transmission performance of the cable. For example, the cable conductor at the bend may deform, leading to signal attenuation or distortion. In this embodiment, the first conductor 400 includes a first connecting line 420 and a first post 430. The first post 430 is snapped into the first connecting hole 120. The first connecting line 420 is arranged in a straight line, with one end electrically connected to the positive electrode post 200, and the other end directly or indirectly welded to the first post 430 (for example, a conductive foil is also provided between the first connecting line 420 and the first post 430). The electrical connection to the first post 430 eliminates the need for bending, thereby improving the accuracy of signal transmission and thus improving the accuracy of single-cell battery information acquisition. Furthermore, the insertion between the first post 430 and the top cover 100 makes the installation of the first conductor 400 more convenient, further improving the assembly efficiency of the top cover assembly. Similarly, in some embodiments, the second conductor 500 includes a second connecting wire and a second post. The second post has a second connecting end 510. The second post passes through and is snapped into the second connecting hole 130. One end of the second connecting wire is electrically connected to the negative terminal 300, and the other end is electrically connected to the end of the second post opposite to the second connecting end 510. This will not be described in detail here.

[0067] It should be noted that when the first column 430 does not have an insulating layer on its outer side, the top cover assembly also includes a first insulating sleeve. The first insulating sleeve is fitted on the outside of the first column 430 and located inside the first connecting hole 120 to isolate the first column 430 and the top cover 100 and prevent electrical connection between the first column 430 and the top cover 100. Similarly, a second insulating sleeve is provided between the second column and the top cover 100. This not only prevents the top cover 100 from becoming charged, but also improves the accuracy of single-cell battery information collection.

[0068] As can be seen from the above embodiments, the first pad 610 abuts against the first connecting end 410, and the second pad 620 abuts against the second connecting end 510. Therefore, high requirements are placed on the installation accuracy of the first pillar 430, the second pillar, and the slave board 600, as well as the machining accuracy of the slave board 600. For example, not only should the first connecting end 410 and the second connecting end 510 be located on the same plane as much as possible during installation, but the first pad 610 and the second pad 620 should also be located on the same plane as much as possible, so that after the first pad 610 abuts against the first connecting end 410, the second pad 620 abuts against the second connecting end 510. This embodiment effectively improves this problem. In this embodiment, the first column 430 includes a first snap-fit ​​portion 431, a first elastic portion 432, and a first abutment portion 433, as shown in Figure 5. Figure 5 is another structural schematic diagram of the top cover, positive electrode post, and first conductor in Figure 3. The first snap-fit ​​portion 431 and the first elastic portion 432 are snapped into the first connecting hole 120. The first elastic portion 432 is a spring or any elastic structure with conductive properties. One end of the first elastic portion 432 is connected to the first snap-fit ​​portion 431, and the other end is connected to the first abutment portion 433. The end of the first abutment portion 433 facing away from the first snap-fit ​​portion 431 is the first connecting end 410. Therefore, during the assembly of a single battery cell, the position of the first connecting end 410 can be adaptively adjusted according to the position of the first solder pad 610, thereby ensuring that the first solder pad 610 abuts against the first connecting end 410 while the second solder pad 620 abuts against the first connecting end 410. Specifically, for example, during the assembly process, when the slave board 600 is snapped onto the top cover 100, the first pad 610 first contacts the first connecting end 410, and the first elastic part 432 is compressed until the second pad 620 contacts the second connecting end 510, after which the slave board 600 is fixed in position. At this time, it can be ensured that the first pad 610 abuts against the first connecting end 410, while the second pad 620 abuts against the second connecting end 510, without the need for precise calculation of the positions of the first connecting end 410 and the second connecting end 510, as well as the first pad 610 and the second pad 620. Therefore, this embodiment can reduce the installation accuracy of the first column 430, the second column, and the slave board 600 while ensuring the reliability of the slave board 600, and can also reduce the processing accuracy of the slave board 600, thereby making the installation of the top cover assembly of this embodiment simpler and cheaper.

[0069] Similarly, in some embodiments, the second column includes a second snap-fit ​​portion, a second elastic portion, and a second abutment portion. The second snap-fit ​​portion is snapped into the second connecting hole 130. One end of the second elastic portion is connected to the second snap-fit ​​portion, and the other end is connected to the second abutment portion. The end of the second abutment portion opposite to the second snap-fit ​​portion is the second connecting end 510, which will not be described in detail here.

[0070] It should be noted that when the first column 430 includes the first elastic part 432 and the second column includes the second elastic part, the first connecting end 410 and the second connecting end 510 can both adaptively adjust their positions. Therefore, even if the plate 600 is displaced during use, it can still be ensured that the first pad 610 abuts against the first connecting end 410 and the second pad 620 abuts against the second connecting end 510, thereby improving the reliability of the top cover assembly of this embodiment.

[0071] In some embodiments, the first connecting line 420 is an FDC flexible flat cable. Specifically, due to its flat design, the FDC flexible flat cable is relatively small in size, making the wiring more compact and thus improving the energy density of the individual battery. At the same time, the connection of the FDC flexible flat cable is relatively simple and quick, improving assembly efficiency. Furthermore, the FDC flexible flat cable can effectively reduce electromagnetic interference and ensure the stability of data transmission, thereby improving the accuracy of individual battery information detection. Similarly, in some embodiments, the second connecting line is an FDC flexible flat cable, which will not be described further here.

[0072] Referring to Figures 1 and 3, in some embodiments, the top cover 100 further includes a groove 150 and a slot 151 communicating with the groove 150 (as shown in Figure 3). The slot 151 is located on the first surface 110. The shape and size of the groove 150 are adapted to the slave plate 600. The slave plate 600 can extend into the slot 151 and engage with the groove 150 without protruding from it. Therefore, in this embodiment, the groove 150 prevents the slave plate 600 from protruding from the first surface 110 of the top cover 100, thereby reducing unnecessary protrusions and protrusions, making the device appearance smoother and more integrated, and thus reducing the space occupied by the top cover assembly in this embodiment to improve the energy density of the single battery. Simultaneously, it allows the slave plate 600 to engage with the groove 150 without the need for other structures for engaging with it, thus simplifying the structure of the top cover assembly in this embodiment.

[0073] In some embodiments, the top cover assembly further includes a structural adhesive that fills the groove 150. The structural adhesive can be, for example, polyurethane structural adhesive, acrylic structural adhesive, or silicone. Filling the groove 150 with the structural adhesive improves the connection strength and sealing between the slave plate 600 and the top cover 100, thereby improving the reliability of the top cover assembly. Furthermore, when a structural adhesive with high thermal conductivity, such as epoxy resin, is selected, the heat dissipation performance of the slave plate 600 can be improved, thereby enhancing the working performance of the slave plate 600 and its safety during use.

[0074] Referring to Figure 2, in some embodiments, the top cover assembly further includes an explosion-proof valve 700 connected to the top cover 100. A plate 600 is located between the explosion-proof valve 700 and the positive terminal 200. Two second solder pads 620 are spaced apart along the width direction of the top cover 100, so that the two second conductors 500 have a certain distance in the width direction of the top cover 100, thus avoiding the explosion-proof valve 700. Therefore, when the top cover assembly of this embodiment is used in a single battery cell, the assembly efficiency of the top cover assembly can be improved while ensuring the safety of the single battery cell. Specifically, the explosion-proof valve 700 is an important safety device in the single battery cell. If the wires in the battery come into contact with the explosion-proof valve 700, it may interfere with the normal operation of the explosion-proof valve 700, or in some cases, it may even cause safety problems due to friction or short circuit between the wires and the explosion-proof valve 700. Therefore, to improve the safety of a single battery cell, the wires need to avoid the explosion-proof valve 700. That is, the second conductor 500 in this embodiment needs to avoid the explosion-proof valve 700. Based on this, in this embodiment, the two second pads 620 of the board 600 are spaced apart along the width direction of the top cover 100. When setting the second conductors 500, the two second conductors 500 can be respectively placed on both sides of the explosion-proof valve 700 along the width direction of the top cover 100, making the internal space layout of the top cover assembly more reasonable and the wiring simpler, thereby improving the assembly efficiency of the top cover assembly. It should be noted that when the second conductor 500 includes two fourth conductor portions, the two fourth conductor portions are treated similarly, and will not be described again here.

[0075] Similarly, in some embodiments, the plate 600 is located between the explosion-proof valve 700 and the negative terminal 300, and the two first solder pads 610 are spaced apart along the width direction of the top cover 100, which will not be described in detail here.

[0076] Referring to Figure 6, which is a structural schematic diagram of a single-cell battery according to a second aspect embodiment of this application, the single-cell battery of the second aspect embodiment includes: a housing 800, a battery cell, and a top cover assembly according to the first aspect embodiment. The housing 800 has a receiving cavity and an opening communicating with the receiving cavity. The battery cell is disposed in the receiving cavity and includes a cathode plate and an anode plate. The top cover 100 is connected to the housing 800 and seals the opening. The positive electrode post 200 is electrically connected to the cathode plate, and the negative electrode post 300 is electrically connected to the anode plate. In this embodiment, the slave plate 600 in the top cover assembly is snapped onto the top cover 100, and the first solder pad 610 and the second solder pad 620 on the slave plate 600 abut against the first connection end 410 and the second connection end 510, respectively. Therefore, during the assembly of the top cover assembly, the slave plate 600 can be directly snapped onto the top cover 100, and the first solder pad 610 and the second solder pad 620 can abut against the first connection end 410 and the second connection end 510, respectively, thereby completing the power supply to the slave plate 600 without the need to solder between the slave plate 600 and the first conductor 400, or between the slave plate 600 and the second conductor 500. This makes the installation of the slave plate 600 simpler, thereby improving the assembly efficiency of the single cell in this embodiment.

[0077] It should be noted that since this embodiment adopts all the technical features of the top cover assembly of the first aspect embodiment, this embodiment has all the beneficial effects brought by the first aspect embodiment, which will not be repeated here.

[0078] The battery pack of the third aspect embodiment of this application includes: a single cell of the second aspect embodiment, wherein a slave plate 600 of the single cell is snapped onto the top cover 100, and a first solder pad 610 and a second solder pad 620 on the slave plate 600 abut against a first connection end 410 and a second connection end 510, respectively. Therefore, during the assembly of the single cell, the slave plate 600 can be directly snapped onto the top cover 100, and the first solder pad 610 and the second solder pad 620 can abut against the first connection end 410 and the second connection end 510, respectively, thereby completing the power supply to the slave plate without the need to solder between the slave plate 600 and the first conductor 400, and between the slave plate 600 and the second conductor 500. This makes the installation of the slave plate 600 simpler, thereby improving the assembly efficiency of the battery pack of this embodiment.

[0079] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of this application. Furthermore, in the description of this application, the reference to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., means that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. Top cover assembly, including: Top cover, having a first surface; A positive electrode post, connected to the top cover, is used for electrical connection with the cathode plate of a single cell; The negative electrode post is connected to the top cover and is used for electrical connection with the anode plate of the single cell; The first conductor has one end electrically connected to the positive terminal post, and the other end protruding from the first surface of the top cover to form a first connection end; The second conductor has one end electrically connected to the negative electrode post, and the other end exposed from the first surface to the top cover, forming a second connection end; The slave board has a first pad and a second pad on its surface. The slave board is snapped onto the top cover. The first pad abuts against the first connection end, and the second pad abuts against the second connection end.

2. The top cover assembly according to claim 1, wherein, The top cover also has a first connecting hole and a second connecting hole, both of which penetrate the top cover along its thickness direction. The first conductor passes through the first connecting hole, and the second conductor passes through the second connecting hole.

3. The top cover assembly according to claim 2, wherein, The first conductor includes a first connecting wire and a first post. The first post has a first connecting end. The first post passes through and is engaged in the first connecting hole. One end of the first connecting wire is electrically connected to the positive terminal, and the other end is electrically connected to the end of the first post opposite to the first connecting end; and / or, The second conductor includes a second connecting wire and a second post. The second post has a second connecting end. The second post passes through and is snapped into the second connecting hole. One end of the second connecting wire is electrically connected to the negative terminal post, and the other end is electrically connected to the end of the second post opposite to the second connecting end.

4. The top cover assembly according to claim 3, wherein, The first column includes a first engaging portion, a first elastic portion, and a first abutting portion. The first engaging portion engages within the first connecting hole. One end of the first elastic portion is connected to the first engaging portion, and the other end is connected to the first abutting portion. The end of the first abutting portion opposite to the first engaging portion is the first connecting end; and / or, The second column includes a second snap-fit ​​portion, a second elastic portion, and a second abutment portion. The second snap-fit ​​portion snaps into the second connecting hole. One end of the second elastic portion is connected to the second snap-fit ​​portion, and the other end is connected to the second abutment portion. The end of the second abutment portion opposite to the second snap-fit ​​portion is the second connecting end.

5. The top cover assembly according to claim 3, wherein, The first connecting line is an FDC flexible flat cable; and / or, The second connecting line is an FDC flexible flat cable.

6. The top cover assembly according to claim 1, wherein, The top cover also has a groove and a slot communicating with the groove. The slot is located on the first surface. The shape and size of the groove are adapted to the secondary plate. The secondary plate can extend into the slot and engage with the groove, and the secondary plate does not protrude from the groove.

7. The top cover assembly according to claim 6, wherein, The top cover assembly also includes structural adhesive, which fills the groove.

8. The top cover assembly according to claim 7, wherein, The structural adhesive is a polyurethane structural adhesive, an acrylic structural adhesive, or a silicone adhesive.

9. The top cover assembly according to claim 1, wherein, The slave board includes an EIS chip, and the slave board has two first pads and two second pads; Two of each of the first and second conductors are provided. One end of each of the two first conductors is electrically connected to the positive terminal, and the other end abuts against the two first pads, respectively. One end of each of the two second conductors is electrically connected to the negative terminal, and the other end abuts against the two second pads, respectively; or... The first conductor includes a first conductor portion and two second conductor portions. One end of each of the two second conductor portions abuts against the two first pads, and the other end is connected to the first conductor portion. The first conductor portion is electrically connected to the positive terminal. The second conductor includes a third conductor portion and two fourth conductor portions. One end of each of the two fourth conductor portions abuts against the two second pads, and the other end is connected to the third conductor portion. The third conductor portion is electrically connected to the negative terminal.

10. The top cover assembly according to claim 9, wherein, The top cover assembly also includes an explosion-proof valve, which is connected to the top cover; The slave plate is located between the explosion-proof valve and the positive terminal, and the two second solder pads are spaced apart along the width direction of the top cover; or, The slave plate is located between the explosion-proof valve and the negative terminal, and the two first solder pads are spaced apart along the width direction of the top cover.

11. The top cover assembly according to claim 3, wherein, The top cover assembly also includes a first insulating sleeve and a second insulating sleeve; The first insulating sleeve is fitted over the outside of the first column and located inside the first connecting hole to isolate the first column from the top cover; and The second insulating sleeve is fitted between the second column and the top cover.

12. The top cover assembly according to claim 1, wherein, The slave board includes a PCB substrate, capacitors, resistors, and chips. The capacitors, resistors, and chips are connected to the PCB substrate via surface mount or pins.

13. The top cover assembly according to claim 1, wherein, The position of the first connection end can be adaptively adjusted according to the position of the first pad, so that the first pad abuts against the first connection end while the second pad abuts against the first connection end.

14. Single-cell battery, including: The housing has a receiving cavity and an opening communicating with the receiving cavity; A battery cell is disposed within the accommodating cavity, and the battery cell includes a cathode plate and an anode plate; The top cover assembly according to any one of claims 1 to 13, wherein the top cover is connected to the housing and seals the opening, the positive terminal is electrically connected to the cathode plate, and the negative terminal is electrically connected to the anode plate.

15. A battery pack comprising the single battery cell of claim 14.

Images