A positive and negative external terminal component

Abstract

The present invention provides a positive and negative external terminal assembly, which is applied to the power battery of an electric vehicle, and the positive and negative external terminal assembly includes: a total positive matching external terminal and a total negative matching external terminal, the total positive matching external terminal serves as the positive terminal of the power battery, and the total negative matching external terminal serves as the negative terminal of the power battery. The positive and negative external terminal assembly of the present invention is applied to the power battery of an electric vehicle, which makes it easy to disassemble and replace the power battery. When a fault occurs, a new battery module can be replaced in time without affecting the continued use of the vehicle. At the same time, the positive and negative external terminal assembly of the present invention adopts a modular design, and only the faulty part needs to be replaced during maintenance, which has lower maintenance costs and higher efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a positive and negative external terminal assembly. Background Art

[0002] Electric vehicles refer to new vehicles that use onboard power as power and motors to drive wheels. As their impact on the environment is relatively small compared to traditional vehicles, their prospects are widely optimistic. Power batteries are an important component of electric vehicles. However, the power battery structure of existing electric vehicles adopts an integral and inseparable connection structure. When the output line fails, the removal of the power battery takes a lot of time, which is not conducive to the user's car experience. Therefore, it is necessary to propose further solutions to the above problems. Summary of the invention

[0003] The present invention aims to provide a positive and negative external terminal assembly to overcome the deficiencies in the prior art.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A positive and negative external terminal assembly is applied to a power battery of an electric vehicle, the positive and negative external terminal assembly comprising: a total positive matching external terminal and a total negative matching external terminal, the total positive matching external terminal is used as the positive terminal of the power battery, and the total negative matching external terminal is used as the negative terminal of the power battery;

[0006] The total positive matching outer end comprises: a first outer end pressing plate, a first adhesive layer, a first outer end insulating cover, a first outer end positive electrode welding assembly and a negative electrode insulating cover plate, wherein the first outer end pressing plate, the first adhesive layer, the first outer end insulating cover, the first outer end positive electrode welding assembly and the negative electrode insulating cover plate are stacked in sequence;

[0007] The total negative matching outer end includes: a second outer end pressure plate, a second adhesive layer, a second outer end insulating cover, a second outer end negative electrode welding assembly and a positive electrode insulating cover plate, and the second outer end pressure plate, the second adhesive layer, the second outer end insulating cover, the second outer end negative electrode welding assembly and the positive electrode insulating cover plate are stacked in sequence.

[0008] As an improvement of the positive and negative external terminal components of the present invention, the first external terminal pressure plate is fixed to one side surface of the first external terminal insulation cover by the first adhesive layer, and the other side surface of the first external terminal insulation cover is installed on the first external terminal positive electrode welding assembly and is locked and fixed by screws.

[0009] As an improvement of the positive and negative outer terminal components of the present invention, through holes are provided on the first outer terminal positive electrode welding assembly and the negative electrode insulating cover plate for screws for locking the first outer terminal insulating cover to pass through.

[0010] As an improvement of the positive and negative outer end components of the present invention, the second outer end negative electrode welding assembly includes: a negative pole conductive column, a negative pole magnet outer frame and a negative pole substrate, the negative pole conductive column and the negative pole magnet outer frame are located on the negative pole substrate, and the negative pole conductive column is located in the space enclosed by the negative pole magnet outer frame.

[0011] As an improvement of the positive and negative outer terminal components of the present invention, a sleeve is further provided on the negative electrode substrate, the sleeve has an opening, the negative electrode conductive column is accommodated in the sleeve and slides along the axial direction of the sleeve, one end of the negative electrode conductive column extends from the opening of the sleeve, and the other end is connected to the elastic member.

[0012] As an improvement of the positive and negative outer end components of the present invention, the first outer end positive electrode welding assembly includes: a positive electrode conductive column, a positive electrode magnet outer frame and a positive electrode substrate, the positive electrode conductive column and the positive electrode magnet outer frame are located on the positive electrode substrate, the positive electrode conductive column is located in the space surrounded by the positive electrode magnet outer frame, the positive electrode conductive column is arranged correspondingly to the negative electrode conductive column, and the positive electrode magnet outer frame is arranged correspondingly to the negative electrode magnet outer frame.

[0013] As an improvement of the positive and negative outer terminal components of the present invention, a magnet guide ring is further provided on the positive electrode substrate, and a magnet guide column corresponding to the magnet guide ring is further provided on the negative electrode substrate.

[0014] As an improvement of the positive and negative outer end components of the present invention, the four sides of the magnet guide column are inclined surfaces, and the inclined surfaces make the magnet guide column have a taper.

[0015] As an improvement of the positive and negative external terminal components of the present invention, first limiting protrusions are provided on the wall surfaces on both sides of the first external terminal insulation cover, and a second limiting protrusion is provided on the bottom surface of any of the first external terminal insulation covers.

[0016] As an improvement of the positive and negative external terminal components of the present invention, third limiting protrusions are provided on the wall surfaces on both sides of the second external terminal insulation cover, and a fourth limiting protrusion is provided on the bottom surface of any second external terminal insulation cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the positive and negative external terminal components of the present invention are applied to the power battery of an electric vehicle, which makes it easy to disassemble and replace the power battery. When a fault occurs, a new battery module can be replaced in time without affecting the continued use of the vehicle. At the same time, the positive and negative external terminal components of the present invention adopt a modular design, and only the faulty part needs to be replaced during maintenance, which reduces maintenance costs and increases efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional exploded schematic diagram of the total positive matching outer end in the positive and negative outer end assembly of the present invention;

[0020] Figure 2 It is a three-dimensional exploded schematic diagram of the total negative matching outer end in the positive and negative outer end assembly of the present invention;

[0021] Figure 3 for Figure 1 A three-dimensional schematic diagram of the positive electrode welding at the first outer end;

[0022] Figure 4 for Figure 2 A three-dimensional schematic diagram of the second outer negative electrode welding assembly;

[0023] Figure 5 It is a schematic diagram of the structural relationship between the negative electrode conductive column, the sleeve and the elastic member in the second outer negative electrode welding assembly;

[0024] Figure 6 It is a cross-sectional view of the magnet guide column and the magnet guide ring when they are matched. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 , 2 As shown, the present invention provides a positive and negative external terminal assembly, which is applied to the power battery of an electric vehicle. The positive and negative external terminal assembly includes: a total positive matching external terminal 3 and a total negative matching external terminal 4, wherein the total positive matching external terminal 3 serves as the positive terminal of the power battery, and the total negative matching external terminal 4 serves as the negative terminal of the power battery.

[0027] The total positive mating outer end 3 comprises: a first outer end pressing plate 31, a first adhesive layer 32, a first outer end insulating cover 33, a first outer end positive electrode welding assembly 34 and a negative electrode insulating cover plate 35. The first outer end pressing plate 31, the first adhesive layer 32, the first outer end insulating cover 33, the first outer end positive electrode welding assembly 34 and the negative electrode insulating cover plate 35 are stacked in sequence.

[0028] The first outer end pressure plate 31 is fixed to one side surface of the first outer end insulation cover 33 through the first adhesive layer 32, and the other side surface of the first outer end insulation cover 33 is mounted on the first outer end positive electrode welding assembly 34 and is locked and fixed by screws. At the same time, first limiting protrusions 331 are provided on the wall surfaces on both sides of the first outer end insulation cover 33, and second limiting protrusions 332 are provided on the bottom surface of any first outer end insulation cover 33. By providing the first limiting protrusion 331 and the second limiting protrusion 332, when the total positive matching outer end 3 is assembled in the box body, it can cooperate with the limiting strip in the box body to achieve the limiting of the total positive matching outer end 3.

[0029] like Figure 3 As shown, the first outer positive electrode welding assembly 34 includes: a magnet guide ring 341, a positive conductive column 342, a positive magnet outer frame 343 and a positive substrate 344. The magnet guide ring 341, the positive conductive column 342 and the positive magnet outer frame 343 are located on the positive substrate 344, and the positive conductive column 342 is located in the space surrounded by the positive magnet outer frame 343. Preferably, the positive conductive column 342 can be a positive conductive copper column, and the positive substrate 344 can be a positive copper plate.

[0030] The positive electrode insulation cover plate 35 is located on the first outer positive electrode welding assembly 34, and a hollow structure is provided on the positive electrode insulation cover plate 35 for the magnet guide ring 341, the positive electrode conductive column 342, and the positive electrode magnet outer frame 343 to extend out. In addition, through holes are provided on the first outer positive electrode welding assembly 34 and the positive electrode insulation cover plate 35 for the screws for locking the first outer insulation cover 33 to pass through.

[0031] like Figure 2 As shown, the total negative matching outer end 4 includes: a second outer end pressing plate 41, a second adhesive layer 42, a second outer end insulating cover 43, a second outer end negative electrode welding assembly 44 and a positive electrode insulating cover plate 45. The second outer end pressing plate 41, the second adhesive layer 42, the second outer end insulating cover 43, the second outer end negative electrode welding assembly 44 and the positive electrode insulating cover plate 45 are stacked in sequence.

[0032] The second outer end pressure plate 41 is fixed to one side surface of the second outer end insulation cover 43 through the second adhesive layer 42, and the other side surface of the second outer end insulation cover 43 is mounted on the second outer end negative electrode welding assembly 44 and is locked and fixed by screws. At the same time, third limiting protrusions 431 are provided on the wall surfaces on both sides of the second outer end insulation cover 43, and fourth limiting protrusions 432 are provided on the bottom surface of any second outer end insulation cover 43. By providing the third limiting protrusion 431 and the fourth limiting protrusion 432, when the total positive mating outer end 3 is assembled in the box body, it can cooperate with the limiting strip in the box body to achieve the limiting of the total negative mating outer end 4.

[0033] like Figure 4 As shown, the second outer negative electrode welding assembly 44 includes: a magnet guide column 441, a negative conductive column 442, a negative magnet outer frame 443 and a negative substrate 444. The magnet guide column 441, the negative conductive column 442 and the negative magnet outer frame 443 are located on the negative substrate 444, and the negative conductive column 442 is located in the space surrounded by the negative magnet outer frame 443. At the same time, the magnet guide column 441, the negative conductive column 442 and the negative magnet outer frame 443 are respectively arranged corresponding to the magnet guide ring 341, the positive conductive column 342 and the positive magnet outer frame 343. Preferably, the negative conductive column 442 can be a negative conductive copper column, and the negative substrate 444 can be a negative copper plate.

[0034] like Figure 5 As shown, the negative electrode conductive column 442 is received in a sleeve 445 disposed on the negative electrode substrate 444, and slides along the axial direction of the sleeve 445. The sleeve 445 has an opening. One end of the negative electrode conductive column 442 extends out from the opening of the sleeve 445, and the other end is connected to the elastic member 446. Thus, when the negative electrode conductive column 442 slides along the sleeve 445 under the action of an external force, the elastic member 446 is compressed. Preferably, the elastic member 216 is a spring.

[0035] The negative electrode insulation cover plate 35 is located on the second outer negative electrode welding assembly 44, and a hollow structure is provided on the negative electrode insulation cover plate 35 for the magnet guide column 441, the negative electrode conductive column 442, and the negative electrode magnet outer frame 443 to extend out. In addition, through holes are provided on the second outer negative electrode welding assembly 44 and the positive electrode insulation cover plate 45 for the screws for locking the second outer insulation cover 43 to pass through.

[0036] Thus, when the total negative matching outer end 4 is used as the negative terminal of the power battery and assembled with the power battery, the negative conductive column 442 is electrically connected to the positive conductive column of the corresponding power battery. Since the negative conductive column 442 is subjected to the force applied by the positive conductive column, it compresses the elastic member 446 connected thereto, and the elastic member 446 accordingly applies a reaction force to the negative conductive column 442, so that the negative conductive column 446 is tightly matched with the positive conductive column. Similarly, the total positive matching outer end 3 can be tightly matched in the same way.

[0037] As shown in Figure 6, the magnet guide column 441 and the magnet guide ring 341 provide guidance for the total positive mating outer end 3 and the total negative mating outer end 4 when they are assembled.

[0038] Among them, the magnet guide column 441 and the magnet guide ring on the power battery have a magnetic force of mutual attraction, and the magnet guide column 441 can be accommodated in the magnet guide ring. At the same time, the four sides of the magnet guide column 441 are inclined surfaces, and the inclined surfaces make the magnet guide column 441 have a taper. This arrangement facilitates the magnet guide column 441 to slide into the corresponding magnet guide ring under the attraction of the magnetic force. Similarly, the magnet guide ring 341 and the magnet guide column on the power battery have a magnetic force of mutual attraction, and the magnet guide column can be accommodated in the magnet guide ring 341.

[0039] Furthermore, there is a magnetic force of mutual attraction between the positive pole magnet outer frame 343 and the negative pole magnet outer frame on the power battery. Thus, when the positive pole conductive column 342 is electrically connected to the negative pole conductive column on the power battery, the end face of the positive pole magnet outer frame 343 is attracted to the end face of the negative pole magnet outer frame. Similarly, there is a magnetic force of mutual attraction between the negative pole magnet outer frame 443 and the positive pole magnet outer frame on the power battery. Thus, when the negative pole conductive column 442 is electrically connected to the positive pole conductive column on the power battery, the end face of the negative pole magnet outer frame 443 is attracted to the end face of the positive pole magnet outer frame.

[0040] In one embodiment, there are four positive conductive columns 212 in the positive magnet outer frame 343, and correspondingly, there are four negative conductive columns 442 in the negative magnet outer frame 443. The number of the positive magnet outer frames 343 is three, two of the three positive magnet outer frames 343 are arranged close to the two side edges of the positive substrate 214, and the third positive magnet outer frame 343 is located between the two positive magnet outer frames 343 and close to the upper edge of the positive substrate 214. The negative magnet outer frame 443 is arranged in a corresponding manner. The number of the positive conductive columns 212 is four, and the four positive conductive columns 212 are located at the four corners of a rectangle. The negative conductive columns 442 are arranged in a corresponding manner.

[0041] In summary, the positive and negative external terminal components of the present invention are applied to the power battery of an electric vehicle, which makes it easy to disassemble and replace the power battery. When a fault occurs, a new battery module can be replaced in time without affecting the continued use of the vehicle. At the same time, the positive and negative external terminal components of the present invention adopt a modular design, and only the faulty part needs to be replaced during maintenance, which reduces maintenance costs and increases efficiency.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A positive and negative external terminal assembly, which is applied to the power battery of an electric vehicle, characterized in that: The positive and negative external terminal assembly includes: a total positive matching external terminal and a total negative matching external terminal, the total positive matching external terminal serves as the positive terminal of the power battery, and the total negative matching external terminal serves as the negative terminal of the power battery; The total positive matching outer end comprises: a first outer end pressing plate, a first adhesive layer, a first outer end insulating cover, a first outer end positive electrode welding assembly and a negative electrode insulating cover plate, wherein the first outer end pressing plate, the first adhesive layer, the first outer end insulating cover, the first outer end positive electrode welding assembly and the negative electrode insulating cover plate are stacked in sequence; The total negative matching outer end comprises: a second outer end pressing plate, a second adhesive layer, a second outer end insulating cover, a second outer end negative electrode welding assembly and a positive electrode insulating cover plate, wherein the second outer end pressing plate, the second adhesive layer, the second outer end insulating cover, the second outer end negative electrode welding assembly and the positive electrode insulating cover plate are sequentially stacked; The second outer negative electrode welding assembly comprises: a negative electrode conductive column, a negative electrode magnet outer frame and a negative electrode substrate, wherein the negative electrode conductive column and the negative electrode magnet outer frame are located on the negative electrode substrate, and the negative electrode conductive column is located in a space surrounded by the negative electrode magnet outer frame; The first outer end positive electrode welding assembly comprises: a positive electrode conductive column, a positive electrode magnet outer frame and a positive electrode substrate, wherein the positive electrode conductive column and the positive electrode magnet outer frame are located on the positive electrode substrate, the positive electrode conductive column is located in the space surrounded by the positive electrode magnet outer frame, the positive electrode conductive column is arranged correspondingly to the negative electrode conductive column, and the positive electrode magnet outer frame is arranged correspondingly to the negative electrode magnet outer frame; a magnet guide ring is also arranged on the positive electrode substrate, and a magnet guide column corresponding to the magnet guide ring is also arranged on the negative electrode substrate; A first limiting protrusion is arranged on the wall surfaces on both sides of the first outer end insulation cover, and a second limiting protrusion is arranged on the bottom surface of any one of the first outer end insulation covers; a third limiting protrusion is arranged on the wall surfaces on both sides of the second outer end insulation cover, and a fourth limiting protrusion is arranged on the bottom surface of any one of the second outer end insulation covers.

2. The positive and negative external terminal assembly according to claim 1, characterized in that: The first outer end pressure plate is fixed to one side surface of the first outer end insulation cover through the first adhesive layer, and the other side surface of the first outer end insulation cover is mounted on the first outer end positive electrode welding assembly and is locked and fixed by screws.

3. The positive and negative external terminal assembly according to claim 2, characterized in that: The first outer positive electrode welding assembly and the negative electrode insulating cover plate are provided with through holes for screws for locking the first outer end insulating cover to pass through.

4. The positive and negative external terminal assembly according to claim 1, characterized in that: The negative electrode substrate is also provided with a sleeve having an opening. The negative electrode conductive column is received in the sleeve and slides along the axial direction of the sleeve. One end of the negative electrode conductive column extends out from the opening of the sleeve, and the other end is connected to the elastic member.

5. The positive and negative external terminal assembly according to claim 1, characterized in that: The four sides of the magnet guide column are inclined surfaces, and the inclined surfaces make the magnet guide column have a taper.

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