Top cover assembly, single battery and battery pack

Abstract

The utility model discloses a top cover assembly, a single battery and a battery pack, and the top cover assembly comprises a top cover, a positive pole, a negative pole, a first conductor, a second conductor and a slave plate. The top cover is provided with a first surface, the positive pole and the negative pole are both connected to the top cover, one end of the first conductor is electrically connected to the positive pole, the other end of the first conductor is exposed out of the top cover to form a first connecting end, one end of the second conductor is electrically connected to the negative pole, and the other end of the second conductor is exposed out of the top cover to form a second connecting end. The slave plate is clamped to the top cover, the first bonding pad abuts against the first connecting end, and the second bonding pad abuts against the second connecting end. Therefore, in the assembling process, the slave plate can be directly clamped to the top cover, the first bonding pad and the second bonding pad abut against the first connecting end and the second connecting end respectively, welding between the slave plate and the first electric conductor and welding between the slave plate and the second electric conductor are not needed, and the assembling efficiency of the top cover assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a top cover assembly, a single cell and a battery pack. Background Art

[0002] In the related art, a slave plate is provided on the top cover of the battery, a corresponding chip is provided on the slave plate, and the slave plate is connected to the pole through a wire to collect information of the single battery, such as voltage, current and electrochemical impedance spectroscopy (EIS), etc. However, due to the small size of the slave plate, its installation and welding are more troublesome, resulting in low assembly efficiency and not conducive to mass production. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a top cover assembly with high assembly efficiency.

[0004] The utility model also provides a single cell battery comprising the top cover assembly.

[0005] The utility model also provides a battery pack comprising the above-mentioned single battery.

[0006] According to the first aspect of the present invention, the top cover assembly includes: a top cover, a positive pole, a negative pole, a first conductor, a second conductor and a slave plate.

[0007] The top cover has a first surface, the positive electrode column is connected to the top cover for electrically connecting to the cathode sheet of the single cell, the negative electrode column is connected to the top cover for electrically connecting to the anode sheet of the single cell, one end of the first conductor is electrically connected to the positive electrode column, and the other end is exposed from the first surface to the top cover to form a first connection end, one end of the second conductor is electrically connected to the negative electrode column, and the other end is exposed from the first surface to the top cover to form a second connection end, the surface of the slave board has a first welding pad and a second welding pad, the slave board is clamped to the top cover, the first welding pad abuts the first connection end, and the second welding pad abuts the second connection end.

[0008] The top cover assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0009] In the present embodiment, the slave board is clamped to the top cover, and the first soldering pad and the second soldering pad on the slave board are respectively abutted against the first connection end and the second connection end. Therefore, during the assembly process of the top cover assembly of the present embodiment, the slave board can be directly clamped to the top cover, and the first soldering pad and the second soldering pad are respectively abutted against the first connection end and the second connection end, thereby completing the power supply to the slave board without the need to weld the slave board and the first conductor, and between the slave board and the second conductor, thereby making the installation of the slave board simpler to improve the assembly efficiency of the top cover assembly of the present embodiment.

[0010] According to some embodiments of the utility model, 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 of the top cover, the first conductor is passed through the first connecting hole, and the second conductor is passed through the second connecting hole.

[0011] According to some embodiments of the present invention, the first conductor includes a first connecting wire and a first column, the first column has the first connecting end, the first column is passed through and clamped in the first connecting hole, one end of the first connecting wire is electrically connected to the positive electrode column, and the other end is electrically connected to the end of the first column opposite to the first connecting end; and / or,

[0012] The second conductor includes a second connecting wire and a second column, the second column has the second connecting end, the second column is passed through and clamped in the second connecting hole, one end of the second connecting wire is electrically connected to the negative electrode column, and the other end is electrically connected to the end of the second column opposite to the second connecting end.

[0013] According to some embodiments of the utility model, the first column includes a first clamping portion, a first elastic portion and a first abutting portion, the first clamping portion is clamped in the first connecting hole, one end of the first elastic portion is connected to the first clamping portion, and the other end is connected to the first abutting portion, and the end of the first abutting portion away from the first clamping portion is the first connecting end; and / or,

[0014] The second column includes a second clamping portion, a second elastic portion and a second abutting portion, the second clamping portion is clamped in the second connecting hole, one end of the second elastic portion is connected to the second clamping portion, and the other end is connected to the second abutting portion, and the end of the second abutting portion facing away from the second clamping portion is the second connecting end.

[0015] According to some embodiments of the present invention, the first connecting line is an FDC flexible flat cable; and / or,

[0016] The second connecting cable is an FDC flexible flat cable.

[0017] According to some embodiments of the utility model, the top cover also has a groove and a notch connected to the groove, the notch is located on the first surface, the shape and size of the groove are adapted to the slave plate, the slave plate can extend from the notch and be snapped into the groove, and the slave plate does not protrude from the groove.

[0018] According to some embodiments of the present invention, the top cover assembly further includes structural adhesive, and the structural adhesive is filled in the groove.

[0019] According to some embodiments of the present invention, the slave board includes an EIS chip, and the slave board has two first pads and two second pads;

[0020] Two of the first conductors and two of the second conductors are provided, one end of the two first conductors is electrically connected to the positive electrode column, and the other end is respectively abutted against the two first pads, and one end of the two second conductors is electrically connected to the negative electrode column, and the other end is respectively abutted against the two second pads; or,

[0021] The first conductor includes a first conductor portion and two second conductor portions, one end of the two second conductor portions are respectively abutted against the two first welding pads, and the other end is commonly connected to the first conductor portion, and the first conductor portion is electrically connected to the positive electrode column; the second conductor includes a third conductor portion and two fourth conductor portions, one end of the two fourth conductor portions are respectively abutted against the two second welding pads, and the other end is commonly connected to the third conductor portion, and the third conductor portion is electrically connected to the negative electrode column.

[0022] According to some embodiments of the utility model, the top cover assembly further includes an explosion-proof valve, and the explosion-proof valve is connected to the top cover;

[0023] The slave plate is located between the explosion-proof valve and the positive electrode column, and two second welding pads are spaced apart along the width direction of the top cover; or,

[0024] The slave plate is located between the explosion-proof valve and the negative pole, and the two first welding pads are spaced apart along the width direction of the top cover.

[0025] A single cell battery according to an embodiment of the second aspect of the utility model comprises: a shell, a battery cell and the top cover assembly described in the embodiment of the first aspect.

[0026] The shell has a receiving cavity and an opening connected to the receiving cavity. The battery cell is arranged in the receiving cavity. The battery cell includes a cathode sheet and an anode sheet. The top cover is connected to the shell and covers the opening. The positive electrode column is electrically connected to the cathode sheet, and the negative electrode column is electrically connected to the anode sheet.

[0027] The single cell battery according to the embodiment of the utility model has at least the following beneficial effects:

[0028] Using the top cover assembly of the first aspect embodiment, the slave board in the top cover assembly is clamped to the top cover, and the first welding pad and the second welding pad on the slave board are respectively abutted against the first connection end and the second connection end. Therefore, during the assembly process of the top cover assembly, the slave board can be directly clamped to the top cover, and the first welding pad and the second welding pad are respectively abutted against the first connection end and the second connection end, thereby completing the power supply to the slave board without the need to weld the slave board and the first conductor, and between the slave board and the second conductor, thereby making the installation of the slave board simpler, thereby improving the assembly efficiency of the single cell battery of this embodiment.

[0029] The battery pack according to the third embodiment of the utility model includes: the single cell according to the second embodiment.

[0030] The battery pack according to the embodiment of the utility model has at least the following beneficial effects:

[0031] Using the single cell battery of the second aspect embodiment, the slave board in the single cell battery is clamped to the top cover, and the first welding pad and the second welding pad on the slave board are respectively abutted against the first connection end and the second connection end. Therefore, during the assembly process of the single cell battery, the slave board can be directly clamped to the top cover, and the first welding pad and the second welding pad are respectively abutted against the first connection end and the second connection end, thereby completing the power supply to the slave board without welding the slave board and the first conductor, and between the slave board and the second conductor, thereby making the installation of the slave board simpler, thereby improving the assembly efficiency of the battery pack of this embodiment.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 This is a schematic structural diagram of a top cover assembly according to an embodiment of the first aspect of the utility model;

[0035] Figure 2 for Figure 1 Schematic diagram from another perspective;

[0036] Figure 3 for Figure 1 Another schematic diagram in;

[0037] Figure 4 for Figure 3 A schematic diagram of the structure of the middle top cover, the positive pole and the first conductor;

[0038] Figure 5 for Figure 3 Another schematic diagram of the structure of the middle top cover, the positive pole and the first conductor;

[0039] Figure 6 This is a schematic structural diagram of a single cell according to an embodiment of the second aspect of the utility model.

[0040] Reference numerals:

[0041] Top cover 100, first surface 110, first connection hole 120, second connection hole 130, second surface 140, groove 150, notch 151;

[0042] Positive pole 200, negative pole 300;

[0043] A first conductive body 400 , a first connecting end 410 , a first connecting line 420 , a first column 430 , a first clamping portion 431 , a first elastic portion 432 , and a first abutting portion 433 ;

[0044] A second conductor 500, a second connection end 510;

[0045] From the board 600, a first pad 610, a second pad 620;

[0046] Explosion-proof valve 700 , housing 800 . DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0050] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0051] In the related art, a slave board (such as a PCB board) is set on the top cover of the battery, a corresponding chip is set on the slave board, and the slave board and the pole are connected by wires to collect information of the single battery, such as voltage, current and electrochemical impedance spectrum, etc. However, due to the small size of the slave board, its installation and welding are more troublesome, resulting in low assembly efficiency, which is not conducive to mass production.

[0052] Based on the above problems, the first embodiment of the present invention proposes a top cover assembly to improve assembly efficiency. Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the top cover assembly of the first embodiment of the utility model. Figure 2 for Figure 1 Another perspective diagram, Figure 3 for Figure 1 Another schematic diagram in FIG. 1 shows a top cover assembly of the present embodiment, which includes: a top cover 100 , a positive electrode column 200 , a negative electrode column 300 , a first conductor 400 , a second conductor 500 and a slave plate 600 .

[0053] The top cover 100 has a first surface 110, the positive electrode column 200 is connected to the top cover 100 for electrically connecting to the cathode sheet of the single cell, and the negative electrode column 300 is connected to the top cover 100 for electrically connecting to the anode sheet of the single cell. One end of the first conductor 400 is electrically connected to the positive electrode column 200, and the other end is exposed from the top cover 100 from the first surface 110 to form a first connection end 410 (such as Figure 3 One end of the second conductor 500 is electrically connected to the negative electrode column 300, and the other end is exposed from the first surface 110 to the top cover 100, forming a second connection end 510 (as shown in FIG. Figure 3The slave board 600 has a first pad 610 and a second pad 620 on its surface. The slave board 600 is connected to the first surface 110 of the top cover 100 by means of a buckle 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 components such as a PCB substrate, capacitors, resistors and chips. The PCB substrate is snapped onto the top cover 100. The components are connected to the PCB substrate by means of patches or pins. The first conductor 400 and the second conductor 500 can be, for example, any conductive structural member such as a wire, a copper bus or an aluminum bus, and the chip can be an EIS chip or a voltage chip according to the detection requirements. Therefore, when the top cover assembly of the present embodiment is used for a single cell, after the first pad 610 and the second pad 620 are respectively connected to the positive electrode column 200 and the negative electrode column 300 through the first conductor 400 and the second conductor 500, the components on the slave board 600 can be powered, thereby realizing the detection of one or more of the voltage, current or electrochemical impedance spectrum in the single cell.

[0054] Specifically, since in the present embodiment, the slave board 600 is clamped to the top cover 100, and the first soldering pad 610 and the second soldering pad 620 on the slave board 600 are respectively abutted against the first connection end 410 and the second connection end 510, therefore, during the assembly process of the top cover assembly of the present embodiment, the slave board 600 can be directly clamped to the top cover 100, and the first soldering pad 610 and the second soldering pad 620 are respectively abutted against the first connection end 410 and the second connection end 510, thereby completing the power supply to the slave board 600, without the need to weld the slave board 600 and the first conductor 400, and the slave board 600 and the second conductor 500, thereby making the installation of the slave board 600 simpler, thereby improving the assembly efficiency of the top cover assembly of the present embodiment.

[0055] It should be noted that when the slave board 600 includes an EIS chip, the first pad 610 and the second pad 620 each have two, thereby meeting the four-wire collection requirements of the EIS chip. Specifically, for example, in some embodiments, the slave board 600 includes an EIS chip, the slave board 600 has two first pads 610 and two second pads 620, the first conductor 400 and the second conductor 500 are each provided with two, one end of the two first conductors 400 are electrically connected to the positive pole 200, and the other end is respectively abutted against the two first pads 610, and one end of the two second conductors 500 are electrically connected to the negative pole 300, and the other end is respectively abutted against the two second pads 620, to meet the four-wire requirements of the EIS chip, so that when the top cover assembly of this embodiment is used for a single cell, the EIS of the single cell can be detected.

[0056] Further, based on the above embodiment, the first conductor 400 includes a first conductor part and two second conductor parts, one end of the two second conductor parts respectively abuts against the two first pads 610, and the other end is commonly connected to the first conductor part, and the first conductor part is electrically connected to the positive electrode column 200, and the second conductor 500 includes a third conductor part and two fourth conductor parts, one end of the two fourth conductor parts respectively abuts against the two second pads 620, and the other end is commonly connected to the third conductor part, and the third conductor part is electrically connected to the negative electrode column 300. Therefore, during the assembly process, the positive electrode column 200 and the negative electrode column 300 only need to be welded once, so that the single battery assembly efficiency of this embodiment is higher. Specifically, taking the first conductor 400 as an example, as in the above embodiment, when two first conductors 400 are used, during the assembly process, the two first conductors 400 need to be electrically connected to the positive pole 200 respectively, and the first conductor 400 of this embodiment includes a first conductor part and two second conductor parts, and the two second conductor parts are connected to the positive pole 200 through a first conductor part. Therefore, during the assembly process, only one welding is required between the positive pole 200 and the first conductor 400 to meet the four-wire system requirements of the EIS chip, thereby making the assembly efficiency of the top cover assembly of this embodiment higher. Among them, the second conductor 500 is the same, and it will not be repeated here.

[0057] Reference Figure 2 and Figure 3 In some embodiments, the top cover 100 further has a first connection hole 120 and a second connection hole 130 (eg Figure 3 As shown in FIG. 1 , 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 is disposed in the first connection hole 120, and the second conductor 500 is disposed in the second connection hole 130. Specifically, taking the first conductor 400 as an example, the first conductor 400 is disposed in the first connection hole 120, that is, one end of the first conductor 400 is exposed from the first connection hole 120 to form a first connection end 410, and the other end is disposed along the surface of the top cover 100 opposite to the first surface 110 ( Figure 2 The second surface 140 in the middle extends to the positive electrode column 200 and is welded to the positive electrode column 200. Therefore, when the top cover assembly of this embodiment is used for a single cell, the first conductor 400 can be located inside the single cell, which can not only reduce the impact of external interference on signal transmission to improve the stability and reliability of the battery management system, but also make the single cell more compact to improve the energy density of the single cell.

[0058] Reference Figure 4 , Figure 4 for Figure 3A schematic diagram of the structure of the middle top cover, the positive pole and the first conductor. Based on the above embodiment, the first conductor 400 includes a first connecting wire 420 and a first column 430. The first column 430 has a first connecting end 410. The first column 430 is passed through and clamped in the first connecting hole 120. One end of the first connecting wire 420 is electrically connected to the positive pole 200, and the other end is electrically connected to the end of the first column 430 opposite to the first connecting end 410. Specifically, it can be known that bending may cause the transmission performance of the cable to be impaired. For example, the cable conductor at the bend may be deformed, resulting in attenuation or distortion of signal transmission. In this embodiment, the first conductor 400 includes a first connecting wire 420 and a first column 430. The first column 430 is clamped in the first connecting hole 120. The first connecting wire 420 is arranged in a straight line, one end of which is electrically connected to the positive pole 200, and the other end is directly welded or indirectly welded to the first column 430 (for example, a conductive foil is also arranged between the first connecting wire 420 and the first column 430), and is electrically connected to the first column 430 without bending, thereby improving the accuracy of signal transmission and further improving the accuracy of single cell information collection. In addition, by plugging the first column 430 and the top cover 100, the first conductor 400 can be installed more conveniently, 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 column, the second column has a second connecting end 510, the second column is passed through and clamped in the second connecting hole 130, one end of the second connecting wire is electrically connected to the negative electrode column 300, and the other end is electrically connected to the end of the second column opposite to the second connecting end 510, which will not be repeated here.

[0059] It should be noted that when the first column 430 itself does not have an insulating layer on the outside, the top cover assembly also includes a first insulating sleeve, which is arranged on the outside of the first column 430 and located in 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 arranged between the second column and the top cover 100, which not only prevents the top cover 100 from being charged, but also improves the accuracy of single cell battery information collection.

[0060] It can be seen from the above embodiment that the first solder pad 610 abuts against the first connection end 410, and the second solder pad 620 abuts against the second connection end 510. Therefore, higher requirements are placed on the installation accuracy of the first column 430, the second column and the slave plate 600, as well as the processing accuracy of the slave plate 600. For example, it is necessary not only to ensure that the first connection end 410 and the second connection end 510 are located in the same plane as much as possible during installation, but also to ensure that the first solder pad 610 and the second solder pad 620 are located in the same plane as much as possible, so that after the first solder pad 610 abuts against the first connection end 410, the second solder pad 620 abuts against the second connection end 510. The present embodiment can effectively improve this problem. In the present embodiment, the first column 430 includes a first clamping portion 431, a first elastic portion 432, a first elastic portion 432 and a first abutting portion 433, as shown in FIG. Figure 5 As shown, Figure 5 for Figure 3 Another structural diagram of the middle top cover, the positive pole and the first conductor, the first clamping portion 431 and the first elastic portion 432 are clamped in the first connection 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 clamping portion 431, and the other end is connected to the first abutting portion 433, and the end of the first abutting portion 433 away from the first clamping portion 431 is the first connection end 410. Therefore, during the assembly process of the single battery, the position of the first connection end 410 can be adaptively adjusted according to the position of the first pad 610, so as to ensure that the first pad 610 abuts against the first connection end 410 while the second pad 620 abuts against the first connection end 410. Specifically, for example, during the assembly process, when the slave board 600 is clamped to the top cover 100, the first solder pad 610 first contacts the first connection end 410, and the first elastic portion 432 is compressed until the second solder pad 620 contacts the second connection end 510 and the position of the slave board 600 is fixed. At this time, it is possible to ensure that the first solder pad 610 abuts against the first connection end 410 while the second solder pad 620 abuts against the second connection end 510, without the need to accurately calculate the positions of the first connection end 410 and the second connection end 510, as well as the first solder pad 610 and the second solder 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 at the same time reduce the processing accuracy of the slave board 600, thereby making the installation of the top cover assembly of this embodiment simpler and more cost-effective.

[0061] Similarly, in some embodiments, the second column includes a second clamping portion, a second elastic portion and a second abutting portion, the second clamping portion is clamped in the second connecting hole 130, one end of the second elastic portion is connected to the second clamping portion, and the other end is connected to the second abutting portion, and the end of the second abutting portion facing away from the second clamping portion is the second connecting end 510, which is not repeated here.

[0062] It should be noted that when the first column 430 includes a first elastic portion 432 and the second column includes a second elastic portion, the first connection end 410 and the second connection end 510 can both be adaptively adjusted in position. Therefore, even if a certain displacement occurs from the board 600 during use, it is still possible to ensure that the first soldering pad 610 abuts against the first connection end 410 and the second soldering pad 620 abuts against the second connection end 510, thereby improving the reliability of the top cover assembly of this embodiment.

[0063] In some embodiments, the first connecting line 420 is an FDC flexible flat cable. Specifically, due to its flat design, the volume of the FDC flexible flat cable is relatively small, making the wiring more compact, thereby improving the energy density of the single battery. At the same time, the connection of the FDC flexible flat cable is relatively simple and fast, which improves the assembly efficiency. In addition, the FDC flexible flat cable can effectively reduce electromagnetic interference and ensure the stability of data transmission, thereby improving the accuracy of single battery information detection. Similarly, in some embodiments, the second connecting line is an FDC flexible flat cable, which will not be repeated here.

[0064] Reference Figure 1 and Figure 3 In some embodiments, the top cover 100 further has a groove 150 and a notch 151 (eg, Figure 3 As shown in the figure, the notch 151 is located on the first surface 110, and the shape and size of the groove 150 are adapted to the slave plate 600. The slave plate 600 can extend from the notch 151 and snap into the groove 150, and the slave plate 600 does not protrude from the groove 150. Therefore, in this embodiment, by setting the groove 150, it is possible to prevent the slave plate 600 from protruding from the first surface 110 of the top cover 100, thereby reducing unnecessary protrusions and protruding parts, making the appearance of the device smoother and more integrated, thereby reducing the space occupied by the top cover assembly of this embodiment, so as to improve the energy density of the single battery. At the same time, the slave plate 600 can be snapped into the groove 150, and there is no need to set other structures for snapping with the slave plate 600, so that the structure of the top cover assembly of this embodiment is simpler.

[0065] In some embodiments, the top cover assembly further includes structural adhesive, which is filled in the groove 150. The structural adhesive may be, for example, polyurethane structural adhesive, acrylic structural adhesive, or silicone, etc. The structural adhesive is filled in the groove 150, which can improve the connection strength and sealing between the slave board 600 and the top cover 100, thereby improving the reliability of the top cover assembly. In addition, when the structural adhesive is selected from a structural adhesive with high thermal conductivity such as epoxy resin, the heat dissipation performance of the slave board 600 can also be improved, thereby improving the working performance of the slave board 600 and the safety during use.

[0066] Reference Figure 2In some embodiments, the top cover assembly further includes an explosion-proof valve 700, which is connected to the top cover 100, and the slave plate 600 is located between the explosion-proof valve 700 and the positive pole 200. The two second pads 620 are arranged at intervals along the width direction of the top cover 100, so that the two second conductors 500 have a certain interval in the width direction of the top cover 100 and avoid the explosion-proof valve 700. Therefore, when the top cover assembly of this embodiment is used for a single cell, the top cover assembly can be assembled more efficiently while ensuring the safety of the single cell. Specifically, the explosion-proof valve 700 is an important safety device in a single cell. If the wire in the battery contacts 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 wire and the explosion-proof valve 700. Therefore, in order to improve the safety of the single cell, the wire needs to be kept away from the explosion-proof valve 700, that is, the second conductor 500 in this embodiment needs to be kept away from the explosion-proof valve 700. Based on this, in this embodiment, the two second pads 620 of the slave plate 600 are spaced apart along the width direction of the top cover 100. When the second conductor 500 is set, the two second conductors 500 can be respectively set on both sides of the explosion-proof valve 700 along the width direction of the top cover 100, so that the space layout in the top cover assembly is more reasonable and the wiring is 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 parts, the two fourth conductor parts are the same, and no further description is given here.

[0067] Similarly, in some embodiments, the slave plate 600 is located between the explosion-proof valve 700 and the negative electrode column 300, and the two first welding pads 610 are spaced apart along the width direction of the top cover 100, which will not be described in detail here.

[0068] Reference Figure 6 , Figure 6The schematic diagram of the structure of a single cell of the second embodiment of the utility model comprises: a shell 800, a battery cell and a top cover assembly of the first embodiment. The shell 800 has a receiving cavity and an opening connected to the receiving cavity, the battery cell is arranged in the receiving cavity, the battery cell comprises a cathode sheet and an anode sheet, the top cover 100 is connected to the shell 800 and covers the opening, the positive electrode column 200 is electrically connected to the cathode sheet, and the negative electrode column 300 is electrically connected to the anode sheet. Among them, the slave plate 600 in the top cover assembly is clamped on the top cover 100, and the first welding pad 610 and the second welding pad 620 on the slave plate 600 are respectively abutted against the first connection end 410 and the second connection end 510. Therefore, during the assembly process of the top cover assembly, the slave plate 600 can be directly clamped on the top cover 100, and the first welding pad 610 and the second welding pad 620 are respectively abutted against the first connection end 410 and the second connection end 510, thereby completing the power supply to the slave plate 600 without welding the slave plate 600 and the first conductor 400, and the slave plate 600 and the second conductor 500, thereby making the installation of the slave plate 600 simpler to improve the assembly efficiency of the single cell of this embodiment.

[0069] It should be noted that, since this embodiment adopts all the technical features of the top cover assembly of the first embodiment, this embodiment has all the beneficial effects brought by the first embodiment, which will not be repeated here.

[0070] The battery pack of the third embodiment of the utility model comprises: the single cell of the second embodiment, the slave board 600 in the single cell is clamped on the top cover 100, and the first welding pad 610 and the second welding pad 620 on the slave board 600 are respectively abutted against the first connection terminal 410 and the second connection terminal 510, so that in the assembly process of the single cell, the slave board 600 can be directly clamped on the top cover 100, and the first welding pad 610 and the second welding pad 620 are respectively abutted against the first connection terminal 410 and the second connection terminal 510, thereby completing the power supply to the slave board without welding the slave board 600 and the first conductor 400, and the slave board 600 and the second conductor 500, thereby making the installation of the slave board 600 simpler, so as to improve the assembly efficiency of the battery pack of this embodiment.

[0071] The above is a detailed description of the embodiment of the utility model in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned embodiment, and various changes can be made without departing from the purpose of the utility model within the scope of knowledge possessed by ordinary technicians in the relevant technical field. In addition, in the description of the utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A top cover assembly, characterized in that: include: A top cover having a first surface; A positive electrode column, connected to the top cover, and used for electrically connecting to the cathode sheet of the single cell; A negative electrode column, connected to the top cover, and used for electrically connecting to the anode sheet of the single cell; A first conductor, one end of which is electrically connected to the positive electrode column, and the other end of which is exposed from the first surface to the top cover to form a first connection end; A second conductor, one end of which is electrically connected to the negative electrode column, and the other end of which is exposed from the first surface to the top cover to form a second connection end; The slave board has a first soldering pad and a second soldering pad on its surface. The slave board is clamped to the top cover. The first soldering pad abuts against the first connecting end, and the second soldering pad abuts against the second connecting end.

2. The top cover assembly according to claim 1, characterized in that: The top cover also has a first connection hole and a second connection hole. The first connection hole and the second connection hole both penetrate the top cover along the thickness direction of the top cover. The first conductor is inserted into the first connection hole, and the second conductor is inserted into the second connection hole.

3. The top cover assembly according to claim 2, characterized in that: The first conductor includes a first connecting wire and a first column, the first column has the first connecting end, the first column is passed through and clamped in the first connecting hole, one end of the first connecting wire is electrically connected to the positive electrode column, and the other end is electrically connected to the end of the first column opposite to the first connecting end; and / or, The second conductor includes a second connecting wire and a second column, the second column has the second connecting end, the second column is passed through and clamped in the second connecting hole, one end of the second connecting wire is electrically connected to the negative electrode column, and the other end is electrically connected to the end of the second column opposite to the second connecting end.

4. The top cover assembly according to claim 3, characterized in that: The first column comprises a first clamping portion, a first elastic portion and a first abutting portion, the first clamping portion is clamped in the first connecting hole, one end of the first elastic portion is connected to the first clamping portion, and the other end is connected to the first abutting portion, and the end of the first abutting portion away from the first clamping portion is the first connecting end; and / or, The second column includes a second clamping portion, a second elastic portion and a second abutting portion, the second clamping portion is clamped in the second connecting hole, one end of the second elastic portion is connected to the second clamping portion, and the other end is connected to the second abutting portion, and the end of the second abutting portion facing away from the second clamping portion is the second connecting end.

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

6. The top cover assembly according to claim 1, characterized in that: The top cover also has a groove and a notch connected to the groove, the notch is located on the first surface, the shape and size of the groove are adapted to the slave plate, the slave plate can extend from the notch and snap into the groove, and the slave plate does not protrude from the groove.

7. The top cover assembly according to claim 6, characterized in that: The top cover assembly also includes structural adhesive, and the structural adhesive is filled in the groove.

8. The top cover assembly according to claim 1, characterized in that: The slave board includes an EIS chip, and the slave board has two first pads and two second pads; Two of the first conductors and two of the second conductors are provided, one end of the two first conductors is electrically connected to the positive electrode column, and the other end is respectively abutted against the two first pads, and one end of the two second conductors is electrically connected to the negative electrode column, and the other end is respectively abutted against the two second pads; or, The first conductor includes a first conductor portion and two second conductor portions, one end of the two second conductor portions are respectively abutted against the two first welding pads, and the other end is commonly connected to the first conductor portion, and the first conductor portion is electrically connected to the positive electrode column; the second conductor includes a third conductor portion and two fourth conductor portions, one end of the two fourth conductor portions are respectively abutted against the two second welding pads, and the other end is commonly connected to the third conductor portion, and the third conductor portion is electrically connected to the negative electrode column.

9. The top cover assembly according to claim 8, characterized in that: 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 electrode column, and two second welding 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 pole, and the two first welding pads are spaced apart along the width direction of the top cover.

10. A single cell, characterized in that: include: A housing having a housing cavity and an opening communicating with the housing cavity; A battery cell is disposed in the accommodating cavity, wherein the battery cell comprises a cathode sheet and an anode sheet; The top cover assembly according to any one of claims 1 to 9, wherein the top cover is connected to the shell and covers the opening, the positive electrode column is electrically connected to the cathode sheet, and the negative electrode column is electrically connected to the anode sheet.

11. A battery pack, characterized in that: Comprising the single cell battery as claimed in claim 10.

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