Two-strand battery connecting wire of electric vehicle

Abstract

The utility model relates to the technical field of batteries, in particular to a double-strand battery connecting wire of an electric vehicle. The electric vehicle double-strand battery connecting wire comprises a first wire body, a second wire body and two protective shells, a first containing cavity and a first through hole which are communicated with each other are formed in each protective shell, and a second containing cavity and a second through hole which are communicated with each other are further formed in each protective shell. According to the utility model, the two ends of the first wire body are fixed in the first accommodating cavity, and the first circular ring terminal is arranged in the first accommodating cavity, so that the crimping position of the first wire body and the first circular ring terminal is not easy to shift and rub, the second wire body is fixed in the second accommodating cavity, and the second circular ring terminal is arranged in the second accommodating cavity; therefore, the crimping position of the second wire body and the second circular ring terminal is not easy to generate displacement friction, and the first wire body and the second wire body are not easy to generate poor contact due to displacement friction and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a double-strand battery connecting wire for an electric vehicle. Background Art

[0002] In recent years, electric bicycles, with their low-carbon, environmentally friendly, economical, convenient, and adaptable features, have gradually become an important means of transportation for short-distance travel. However, there is still much room for improvement in the wiring of electric bicycle battery cables, which are a key component in the electronic control system.

[0003] At present, most electric vehicles use 4820 battery packs consisting of 4 batteries connected in series and 6020 battery packs consisting of 5 batteries connected in series.

[0004] The battery connection methods of 4820 battery pack and 6020 battery pack are as follows Figure 7 and Figure 8 As shown, two connecting wires of different lengths are used on one side. Each connecting wire includes a wire body and terminals crimped on both ends of the wire body. The wire bodies of the two connecting wires are bundled together with tape to form a double-strand battery connecting wire, and the multiple terminals in the double-strand battery connecting wire are connected to the corresponding terminal in the battery pack by bolts to complete the partial series connection of the battery pack.

[0005] However, the two connecting wires in the above-mentioned double-strand battery connecting wire only fix their terminals to the corresponding battery terminals, and do not effectively fix the wire bodies. In order to prevent poor contact at the crimping points between the wire bodies and the terminals due to displacement friction and other reasons, the wire bodies of the two connecting wires are set to be longer. During the driving of the electric vehicle, the wire bodies have a larger swing range and are prone to friction and extrusion between the support columns at the bottom of the pedals, resulting in damage, short circuits and the like. Utility Model Content

[0006] (1) The problem to be solved by the present invention is: how to reduce the friction and extrusion between the double-strand battery connecting wires and the support column at the bottom of the pedal.

[0007] (2) Technical solution

[0008] The utility model provides a double-strand battery connecting wire for electric vehicles, comprising a first wire body, a second wire body and two protective shells;

[0009] Each of the protective shells is provided with a first accommodating cavity and a first through hole in communication with each other, and is also provided with a second accommodating cavity and a second through hole in communication with each other;

[0010] The first wire body and the second wire body are both located between the two protective shells, and two ends of the first wire body are respectively fixed in the two first accommodating cavities, and two ends of the second wire body are respectively fixed in the two second accommodating cavities;

[0011] A first ring terminal for crimping the first wire body is provided in the first accommodating cavity, and a second ring terminal for crimping the second wire body is provided in the second accommodating cavity;

[0012] The first through hole and the second through hole are both used to make room for bolts.

[0013] According to one embodiment of the present invention, each of the first ring terminals includes a first crimping portion, a first connecting portion, and a first mounting portion connected in sequence;

[0014] The first crimping portion is crimped to one end of the first wire body;

[0015] The first mounting portion is located in the first through hole;

[0016] The length direction of the first connecting portion is perpendicular to the length direction of the first crimping portion.

[0017] According to one embodiment of the present invention, each of the second ring terminals includes a second crimping portion, a second connecting portion, and a second mounting portion connected in sequence;

[0018] The second crimping portion is crimped to one end of the second wire body;

[0019] The second mounting portion is located in the second through hole;

[0020] The length direction of the second connecting portion is perpendicular to the length direction of the second crimping portion.

[0021] According to one embodiment of the present invention, the first wire body and the second wire body have the same structure, the first wire body includes a first copper wire and a first sheath, the first sheath is provided on the first copper wire, the length of the first sheath is less than the length of the first copper wire, and the first crimping portion is crimped to the first copper wire;

[0022] The ends of the first sheath are fixed in the corresponding first accommodating cavity.

[0023] According to one embodiment of the present invention, a limiting assembly is provided in the first through hole and the second through hole, each of the limiting assemblies includes a first ring plate and a second ring plate parallel to each other, and the first mounting portion is located between the first ring plate and the second ring plate.

[0024] According to an embodiment of the present invention, each of the protective shells is provided with two protective caps for protecting the bolts.

[0025] According to one embodiment of the present invention, the protective cap includes a first plate body and a second plate body connected to each other;

[0026] The diameter of the first plate body at one end close to the second plate body is larger than that at the other end, and the diameter of the second plate body is smaller than the diameter of the first through hole;

[0027] The first plate body and the first through hole are interference fit.

[0028] According to an embodiment of the present invention, the protective shell is a plastic shell.

[0029] According to an embodiment of the present invention, the protective shell includes a first shell and a second shell, and the first shell and the second shell are integrally formed.

[0030] According to an embodiment of the present invention, a third through hole is formed on the first plate.

[0031] Beneficial effects of the utility model:

[0032] By fixing the two ends of the first wire body in the first accommodating cavity and arranging the first circular terminal in the first accommodating cavity, the crimping position of the first wire body and the first circular terminal is not prone to displacement and friction. The second wire body is fixed in the second accommodating cavity and the second circular terminal is arranged in the second accommodating cavity, so that the crimping position of the second wire body and the second circular terminal is not prone to displacement and friction. Therefore, the first wire body and the second wire body are not prone to poor contact due to displacement, friction and other reasons. Therefore, the length of the first wire body and the second wire body can be designed to be shorter. During the driving of the electric vehicle, the movement range of the first wire body and the second wire body is greatly reduced. The dangerous area on the battery pack (that is, the area in contact with the support column at the bottom of the pedal) is reduced by 38.2% compared with the traditional double-strand battery connecting wire, and it is not easy to produce friction and extrusion between the support column at the bottom of the pedal, thereby reducing the damage and short circuit of the connecting wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A three-dimensional diagram of a double-strand battery connecting cable provided in an embodiment of the present utility model;

[0035] Figure 2 A three-dimensional diagram of a dual-strand battery connecting cable provided by an embodiment of the present invention with the protective shell and protective cap removed;

[0036] Figure 3 A three-dimensional diagram of a protective case provided by an embodiment of the present utility model;

[0037] Figure 4 A side view of a protective case provided by an embodiment of the present utility model;

[0038] Figure 5 A front view of a first ring terminal provided in an embodiment of the present utility model;

[0039] Figure 6 A schematic diagram of a dual-strand battery connecting cable provided by an embodiment of the present invention installed on a battery pack;

[0040] Figure 7 A schematic diagram of a conventional dual-strand battery connecting wire installed in a 4820 battery pack;

[0041] Figure 8 This is a schematic diagram of a double-strand battery connecting wire installed in a 6020 battery pack in the prior art.

[0042] Icons: 1. First wire body; 101. First copper wire; 102. First sheath; 2. Second wire body; 3. Protective shell; 301. First accommodating cavity; 302. Second accommodating cavity; 4. First circular ring terminal; 401. First crimping part; 402. First mounting part; 403. First connecting part; 5. Second circular ring terminal; 6. First through hole; 7. First ring plate; 8. Second ring plate; 9. Protective cap; 901. First plate body; 902. Second plate body; 10. Connecting belt; 11. Second through hole. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] like Figures 1-6 As shown, one embodiment of the present invention provides a double-strand battery connecting cable for electric vehicles, comprising a first cable body 1, a second cable body 2 and two protective shells 3;

[0045] Each protective shell 3 is provided with a first accommodating cavity 301 and a first through hole 6 in communication with each other, and a second accommodating cavity 302 and a second through hole 11 in communication with each other;

[0046] The first wire body 1 and the second wire body 2 are both located between the two protective shells 3, and the two ends of the first wire body 1 are respectively fixed in the two first accommodating cavities 301, and the two ends of the second wire body 2 are respectively fixed in the two second accommodating cavities 302;

[0047] A first ring terminal 4 for crimping the first wire 1 is provided in the first accommodating cavity 301 , and a second ring terminal 5 for crimping the second wire 2 is provided in the second accommodating cavity 302 ;

[0048] The first through hole 6 and the second through hole 11 are both used to make room for bolts.

[0049] By fixing the two ends of the first wire body 1 in the first accommodating cavity 301 and arranging the first circular terminal 4 in the first accommodating cavity 301, the crimping position of the first wire body 1 and the first circular terminal 4 is not prone to displacement and friction. The second wire body 2 is fixed in the second accommodating cavity 302 and the second circular terminal 5 is arranged in the second accommodating cavity 302, so that the crimping position of the second wire body 2 and the second circular terminal 5 is not prone to displacement and friction. Therefore, the first wire body 1 and the second wire body 2 are not prone to poor contact due to displacement and friction. Therefore, the length of the first wire body 1 and the second wire body 2 can be designed to be shorter. During the driving of the electric vehicle, the movement range of the first wire body 1 and the second wire body 2 is greatly reduced. The dangerous area on the battery pack (i.e., the area in contact with the support column at the bottom of the pedal) is reduced by 38.2% compared with the traditional double-strand battery connecting wire, and it is not easy to produce friction and extrusion between the support column at the bottom of the pedal, thereby reducing the damage and short circuit of the connecting wire.

[0050] Since both ends of the first wire body 1 and the second wire body 2 are fixed by the protective shell 3, even if the first wire body 1 and the second wire body 2 are longer, the range of motion of the double-strand battery connecting cable in this embodiment is reduced compared to the wire bodies in the traditional double-strand battery connecting cable.

[0051] Furthermore, the first mounting portion 402 and the second mounting portion are both annular, and are both mounted to the positive or negative terminal of the corresponding battery by bolts.

[0052] For the convenience of description, the four batteries in the 4820 battery pack are recorded as battery one, battery two, battery three and battery four. Figure 6 As shown, the two first mounting portions 402 in the electric vehicle dual-strand battery connecting wire are respectively connected to the negative pole of battery two and the negative pole of battery three, and the two second mounting portions are respectively connected to the positive pole of battery one and the positive pole of battery four.

[0053] It should be noted that the height of the battery pack compartment of some electric vehicles is greater than the height of the battery pack, and a battery pressure strip is installed on the top of the battery pack to secure the battery pack in place. When the workers are not careful during installation, the double-strand battery connecting wires may be pressed due to their long length. With the new double-strand battery connecting wires, the length can be designed to be shorter, so their activity area is reduced, reducing the possibility of workers pressing the double-strand battery connecting wires when installing the pressure strips.

[0054] According to one embodiment of the present invention, Figure 2 and Figure 5 As shown, each first ring terminal 4 includes a first crimping portion 401, a first connecting portion 403 and a first mounting portion 402 connected in sequence;

[0055] The first crimping portion 401 is crimped to one end of the first wire body 1;

[0056] The first mounting portion 402 is located in the first through hole 6;

[0057] The length direction of the first connecting portion 403 is perpendicular to the length direction of the first crimping portion 401 .

[0058] According to one embodiment of the present invention, Figure 2 As shown, each second ring terminal 5 includes a second crimping portion, a second connecting portion and a second mounting portion connected in sequence;

[0059] The second crimping portion is crimped to one end of the second wire body 2;

[0060] The second mounting portion is located in the second through hole 11;

[0061] The length direction of the second connecting portion is perpendicular to the length direction of the second crimping portion.

[0062] It should be explained that the first through hole 6 and the first accommodating cavity 301 have a first overlapping area, the second through hole 11 and the second accommodating cavity 302 have a second overlapping area, the first mounting portion 402 is partially located in the first overlapping area, and the second mounting portion is located in the second overlapping area.

[0063] like Figure 5 As shown, by setting the length direction of the first connecting part 403 in the first circular ring terminal 4 to be perpendicular to the direction of the first crimping part 401, the first circular ring terminal 4 is L-shaped, and the first wire body 1 can be straight without bending, thereby avoiding damage or short circuit caused by excessive bending angle of the first wire body 1.

[0064] According to one embodiment of the present invention, the first wire body 1 and the second wire body 2 have the same structure. The first wire body 1 includes a first copper wire 101 and a first sheath 102. The first sheath 102 is sleeved on the first copper wire 101. The length of the first sheath 102 is less than the length of the first copper wire 101. The first crimping portion 401 is crimped to the first copper wire 101.

[0065] The ends of the first sheath 102 are fixed in the corresponding first accommodating cavity 301 .

[0066] It should be noted that the first sheath 102 plays a role in protecting the first copper wire 101 and is an existing technology of the first wire body 1.

[0067] When actually crimping the first wire body 1 and the first circular ring terminal 4, first peel off a portion of the two ends of the first sheath 102 so that the length of the first sheath 102 is less than the length of the first copper wire 101, and then the first copper wire 101 is exposed, and then the first circular ring terminal 4 is crimped to the end of the first copper wire 101.

[0068] According to one embodiment of the present invention, Figure 3 As shown, a limiting assembly is provided in the first through hole 6 and the second through hole 11 , each limiting assembly includes a first ring plate 7 and a second ring plate 8 parallel to each other, and the first mounting portion 402 is located between the first ring plate 7 and the second ring plate 8 .

[0069] It should be noted that the provision of the first ring plate 7 and the second ring plate 8 can prevent the first circular terminal 4 or the second circular terminal 5 from being easily deformed, thereby protecting the first circular terminal 4 and the second circular terminal 5 .

[0070] According to one embodiment of the present invention, two protective caps 9 for protecting the bolts are provided on each protective shell 3. The protective caps 9 are connected to the protective shell 3 via a connecting strap 10. The protective caps 9, the connecting strap 10 and the protective shell 3 are integrally injection molded.

[0071] According to one embodiment of the present invention, the protective cap 9 includes a first plate 901 and a second plate 902 connected to each other;

[0072] The diameter of the first plate 901 at one end close to the second plate 902 is larger than that at the other end, and the diameter of the second plate 902 is smaller than the diameter of the first through hole 6;

[0073] The first plate 901 is interference fit with the first through hole 6 .

[0074] The diameter of the second plate body 902 is smaller than the diameter of the first plate body 901, and the diameter of the end of the second plate body 902 away from the first plate body 901 is larger than the diameter of the other end. When the protective cap 9 needs to be removed, a special tool is used to clamp it on the side wall of the second plate body 902. Since the diameter of the end of the second plate body 902 away from the first plate body 901 is larger than the diameter of the other end, when force is applied in the direction away from the first plate body 901, the tool can be clamped on the side wall of the second plate body 902, and then the entire protective cap 9 can be pulled out of the first through hole 6 or the second through hole 11 with force.

[0075] The second ring plate 8 can also limit the depth of the protective cap 9 inserted into the first through hole 6 to prevent the insertion depth from being too deep, which would result in time-consuming and labor-intensive subsequent removal of the protective cap 9 .

[0076] According to an embodiment of the present invention, the protective shell 3 is a plastic shell.

[0077] According to an embodiment of the present invention, the protective shell 3 includes a first shell and a second shell, and the first shell and the second shell are integrally formed.

[0078] Of course, in this embodiment, a rubber layer is provided on the side where the first shell and the second shell are close to each other, a plurality of card blocks are provided on the edge of the first shell, and a plurality of card slots are provided on the edge of the second shell. The card blocks and the card slots correspond one to one, and the card blocks are embedded in the card slots. When the card blocks are engaged, the rubber layer squeezes the first sheath 102 of the first wire body 1 and the second sheath of the second wire body 2, so that the first wire body 1 and the second wire body 2 can receive the extrusion force, thereby reducing the friction at the crimping position of the first wire body 1 and the second wire body 2.

[0079] According to an embodiment of the present invention, a third through hole is defined on the first plate 901 .

[0080] The third through hole can make room for the head of the bolt, and the side wall of the third through hole can also limit the angle of the bolt during threaded connection, thereby improving work efficiency during installation.

[0081] Specifically, first, the two ends of the first sheath 102 in the first wire body 1 are stripped off to reveal the two end portions of the first copper wire 101, and the two first ring terminals 4 are respectively crimped to the two ends of the first copper wire 101 to form a first connecting wire. The second wire body 2 and the second ring terminal 5 are crimped according to the above steps. After crimping, the second connecting wire is formed, and the first connecting wire and the second connecting wire are placed in a mold for producing the protective shell 3, and the protective shell 3 is injection molded as a whole (during injection molding, the first accommodating cavity 301, the second accommodating cavity 302, the first through hole 6 and the second through hole 11 are automatically formed inside the protective shell 3), thereby forming a new type of double-strand battery connecting wire. After the two first mounting parts 402 and the two second mounting parts in the double-strand connecting wire are fixed to the corresponding battery terminals with bolts, a protective cap 9 is correspondingly inserted into the first through hole 6 and the second through hole 11, and the head of the bolt is located in the third through hole opened on the first plate body 901.

[0082] In the description of this utility model, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0083] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-strand battery connecting wire for electric vehicles, characterized in that: It comprises a first linear body (1), a second linear body (2) and two protective shells (3); Each of the protective shells (3) is provided with a first accommodating cavity (301) and a first through hole (6) that are in communication with each other, and is also provided with a second accommodating cavity (302) and a second through hole (11) that are in communication with each other; The first wire body (1) and the second wire body (2) are both located between the two protective shells (3), and the two ends of the first wire body (1) are respectively fixed in the two first accommodating cavities (301), and the two ends of the second wire body (2) are respectively fixed in the two second accommodating cavities (302); A first annular terminal (4) for crimping the first wire body (1) is provided in the first accommodating cavity (301), and a second annular terminal (5) for crimping the second wire body (2) is provided in the second accommodating cavity (302); The first through hole (6) and the second through hole (11) are both used to make room for bolts.

2. The electric vehicle double-strand battery connecting wire according to claim 1, characterized in that: Each of the first annular terminals (4) comprises a first crimping portion (401), a first connecting portion (403) and a first mounting portion (402) connected in sequence; The first crimping portion (401) is crimped to one end of the first wire body (1); The first mounting portion (402) is located in the first through hole (6); The length direction of the first connecting portion (403) is perpendicular to the length direction of the first crimping portion (401).

3. The electric vehicle double-strand battery connecting wire according to claim 2, characterized in that: Each of the second circular ring terminals (5) comprises a second crimping portion, a second connecting portion and a second mounting portion which are connected in sequence; The second crimping portion is crimped to one end of the second wire body (2); The second mounting portion is located in the second through hole (11); The length direction of the second connecting portion is perpendicular to the length direction of the second crimping portion.

4. The electric vehicle double-strand battery connecting wire according to claim 2, characterized in that: The first wire body (1) and the second wire body (2) have the same structure, the first wire body (1) comprises a first copper wire (101) and a first sheath (102), the first sheath (102) is sleeved on the first copper wire (101), the length of the first sheath (102) is less than the length of the first copper wire (101), and the first crimping portion (401) is crimped to the first copper wire (101); The ends of the first sheath (102) are fixedly connected in the first accommodating cavity (301) corresponding thereto.

5. The electric vehicle double-strand battery connecting wire according to claim 2, characterized in that: A limiting assembly is provided in each of the first through hole (6) and the second through hole (11), each of the limiting assemblies comprising a first ring plate (7) and a second ring plate (8) that are parallel to each other, and the first mounting portion (402) is located between the first ring plate (7) and the second ring plate (8).

6. The electric vehicle double-strand battery connecting wire according to claim 1, characterized in that: Each of the protective shells (3) is provided with two protective caps (9) for protecting the bolts.

7. The electric vehicle double-strand battery connecting wire according to claim 6, characterized in that: The protective cap (9) comprises a first plate body (901) and a second plate body (902) connected to each other; The diameter of one end of the first plate body (901) close to the second plate body (902) is larger than that of the other end, and the diameter of the second plate body (902) is smaller than the diameter of the first through hole (6); The first plate (901) and the first through hole (6) are interference fit.

8. The electric vehicle double-strand battery connecting cable according to claim 1, characterized in that: The protective shell (3) is a plastic shell.

9. The electric vehicle double-strand battery connecting cable according to claim 1, characterized in that: The protective shell (3) comprises a first shell and a second shell, and the first shell and the second shell are integrally formed.

10. The electric vehicle double-strand battery connecting wire according to claim 7, characterized in that: A third through hole is provided on the first plate (901).

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