Electric connector capable of enhancing overcurrent performance, connector assembly and battery module

Abstract

The utility model discloses an electric connector capable of enhancing overcurrent performance, a connector assembly and a battery module, and relates to the field of electric connectors for batteries. According to the electric connector provided by the utility model, the first positive terminal with a relatively large plugging and matching size and the first negative terminal with a relatively small plugging and matching size are arranged in the first insulating shell, so that the conductivity of the positive terminal of the battery core body with relatively large internal resistance is enhanced by virtue of the first positive terminal; meanwhile, the first negative terminal can maintain the conductivity of the negative terminal of the battery core body with relatively small internal resistance on the basis of relatively small size, so that the size space is designed by utilizing a limited electric connector on the whole, the output equivalent resistance of the battery module is reduced, and the conductivity of the battery module is enhanced, thereby prolonging the cycle life of the battery module; therefore, the safety of the battery module is enhanced, and the product competitiveness is improved.

Description

Technical Field

[0001] The utility model relates to the field of electric connectors for batteries, and in particular to an electric connector, a connector assembly and a battery module capable of enhancing the overcurrent performance. Background Art

[0002] In the field of RC models, lithium-ion batteries are an important part of their power system, providing continuous and stable power output for the models.

[0003] In order to facilitate discharge and charging, lithium-ion batteries are usually equipped with connecting wires and electrical connectors. When discharging, the lithium-ion battery is connected to the RC model through the electrical connector. When charging, the lithium-ion battery is removed and connected to the charging device through the lithium-ion battery. It can be seen that the electrical connector is a relatively important electronic component in the field of RC models.

[0004] At the same time, RC model batteries have a tendency to develop in the direction of high current and high power, so the electrical connector also needs to have a larger overcurrent performance. However, chargers and RC models have the need to save space, so the electrical connector needs to be smaller to meet the demand.

[0005] It can be seen that there is currently a lack of electrical connector components with smaller size and capable of enhancing the overcurrent capacity of the RC model system on the market. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the main purpose of the utility model is to provide an electrical connector, a connector assembly and a battery module that can enhance the overcurrent performance. With the help of the electrical connector, the overcurrent performance of the electrical connector when used in the battery module can be enhanced within the limited design size space of the electrical connector, thereby enhancing the cycle life of the battery module and thus enhancing the safety of the battery module.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] In a first aspect, the utility model provides an electrical connector capable of enhancing overcurrent performance, comprising a first connector body, wherein the first connector body comprises a first insulating shell, and a first positive terminal and a first negative terminal arranged in parallel between the first insulating shell, and the plug-in fitting size of the first positive terminal is larger than the plug-in fitting size of the first negative terminal.

[0009] Preferably, the front end of the first insulating shell is configured as a male connector structure, the first positive terminal and the first negative terminal are respectively provided with female terminal segments for conductive connection, and the inner diameter of the female terminal segment of the first positive terminal is larger than the inner diameter of the female terminal segment of the first negative terminal.

[0010] Preferably, the above-mentioned electrical connector is further provided with a fixing section for connecting to the first insulating shell respectively, the fixing section is provided with an annular groove, the bottom of the annular groove is provided with a planar notch, and the planar notch of the first positive terminal is opposite to the planar notch of the first negative terminal.

[0011] Preferably, in the above-mentioned electrical connector, the first positive terminal and the first negative terminal are respectively integrally connected with the first insulating shell.

[0012] Preferably, the first positive terminal and the first negative terminal are respectively provided with a connecting section extending from the rear end of the first insulating shell, and the connecting section is provided with a planar groove, and the planar groove of the first positive terminal is opposite to the planar groove of the first negative terminal.

[0013] Preferably, in the above-mentioned electrical connector, the male plug structure of the first insulating housing is provided with a chamfered structure on one side relative to the parallel direction of the first positive terminal and the first negative terminal.

[0014] Preferably, in the above-mentioned electrical connector, the first insulating shell is marked with a positive pole near the first positive terminal, and the first insulating shell is marked with a negative pole near the first negative terminal.

[0015] In a second aspect, the utility model provides a connector assembly, comprising the above-mentioned electrical connector capable of enhancing overcurrent performance, wherein the second connector body is further comprised of a second insulating shell, and a second positive terminal and a second negative terminal arranged in parallel between the second insulating shells, the plug-in fitting size of the second positive terminal being larger than the plug-in fitting size of the second negative terminal, and the first insulating shell and the second insulating shell being matchable and pluggable with each other; when the first insulating shell and the second insulating shell are pluggable with each other, the first positive terminal and the second positive terminal are matchable and pluggable, and the first negative terminal and the second negative terminal are matchable and pluggable.

[0016] Preferably, in the above-mentioned connector assembly, the front end of the second insulating shell is configured as a female plug structure, the second positive terminal and the second negative terminal are respectively provided with male terminal segments for conductive plugging, and the outer diameter of the male terminal segment of the second positive terminal is larger than the outer diameter of the male terminal segment of the second negative terminal.

[0017] In a third aspect, the utility model provides a battery module, comprising the above-mentioned electrical connector capable of enhancing current flow performance, wherein it also comprises a battery core and an electrical conductor, wherein the positive terminal of the battery core is connected to the first positive terminal of the first connector body through the electrical conductor, and the negative terminal of the battery core is connected to the second negative terminal of the first connector body through the electrical conductor.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The electrical connector of the utility model, by arranging a first positive terminal with a larger plug-in fitting size and a first negative terminal with a smaller plug-in fitting size in a first insulating housing, enhances the conductivity of the positive terminal of a battery cell with a larger internal resistance with the help of the first positive terminal, while the first negative terminal can maintain the conductivity of the negative terminal of a battery cell with a smaller internal resistance on the basis of a smaller size. Overall, the limited design size space of the electrical connector is utilized to reduce the output equivalent resistance of the battery module, enhance the conductivity of the battery module, thereby enhancing the cycle life of the battery module and thus enhancing the safety of the battery module.

[0020] (2) The electrical connector of the utility model can be plugged into and matched with the first connector body by providing a second connector body. The first connector body can be used in a battery module to increase the overcurrent performance. The second connector body can be used in an electrical device or a charging device to connect a battery module with the first connector body.

[0021] (3) The battery module of the utility model can reduce the output equivalent resistance and enhance the conductivity by means of the first connector body, thereby improving the product competitiveness.

[0022] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 One of the three-dimensional structural schematic diagrams of the connector assembly according to an embodiment of the utility model;

[0024] Figure 2 A second schematic diagram of the three-dimensional structure of a connector assembly according to an embodiment of the present utility model;

[0025] Figure 3 A schematic cross-sectional structure diagram of a connector assembly according to an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the three-dimensional structure of the first positive terminal according to an embodiment of the utility model;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of the second positive terminal according to an embodiment of the utility model.

[0028] Figure numerals: 10, first connector body; 11, first positive terminal; 12, first negative terminal; 13, first insulating shell; 131, male plug structure; 20, second connector body; 21, second positive terminal; 22, second negative terminal; 23, second insulating shell; 231, female plug structure; 30, chamfer structure; 41, female terminal section; 42, male terminal section; 43, fixing section; 44, connecting section; 431, annular groove; 432, planar notch; 441, planar groove. DETAILED DESCRIPTION

[0029] In order to better illustrate the purpose, technical solution and advantages of the utility model, the specific implementation of the utility model is further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but are not intended to limit the scope of the utility model.

[0030] like Figures 1 to 3 As shown, an electrical connector capable of enhancing the overcurrent performance is provided according to an embodiment of the utility model, namely, a first connector body 10 . Figures 1 to 3 The second connector body 20 is also included, and together with the first connector body 10, constitutes an electrical connector assembly according to an embodiment of the present utility model. Although not shown in the drawings, it can be understood that the first connector body 10 can be connected to the battery core through an electrical wire to constitute a battery module according to an embodiment of the present utility model.

[0031] For details, refer to Figures 1 to 3 , the first connector body 10 includes a first insulating shell 13, and a first positive terminal 11 and a first negative terminal 12 arranged in parallel between the first insulating shell 13. Among them, the plug-in fitting size of the first positive terminal 11 is larger than the plug-in fitting size of the first negative terminal 12. In this embodiment, the first positive terminal 11 and the first negative terminal 12 are respectively provided with female terminal segments 41, and the female terminal ends are plug-in fitted through their internal through holes. As a result, the inner diameter of the female terminal segment 41 of the first positive terminal 11 is larger than the inner diameter of the female terminal end of the first negative terminal 12. In other embodiments, the male terminal structure can also be used for plug-in fitting, and the plug-in fitting size of the first positive terminal 11 is larger than the plug-in fitting size of the first negative terminal 12 by setting the outer diameter. In this embodiment, the inner diameter of the female terminal segment 41 of the first positive terminal 11 is 1.2 times the inner diameter of the female terminal end of the first negative terminal 12. In other embodiments, the multiplier of the plug-in fitting size can be between 1.1 and 1.5.

[0032] When in use, the first connector body 10 of this embodiment will be configured as a battery module. The battery module includes a battery core and an electrical conductor. The positive terminal of the battery core is connected to the first positive terminal 11 of the first connector body 10 through the electrical conductor. At the same time, the negative terminal of the battery core is connected to the second negative terminal 22 of the first connector body 10 through the electrical conductor.

[0033] The working principle of this embodiment is that, generally speaking, in the battery core, the positive electrode tab of the battery core is made of aluminum, and the negative electrode tab of the battery core is made of copper. At the same time, due to the difference in the positive and negative electrode plates and polar materials of the battery core, the internal resistance of the positive terminal of the battery core is relatively large, while the internal resistance of the negative terminal of the battery core is relatively small. With the help of an electrical connector that can enhance the overcurrent performance of the utility model, the first positive terminal 11 with a larger plug-in size is connected to the positive terminal of the battery core, and the first negative terminal 12 with a smaller plug-in size is connected to the negative terminal of the battery core, so that the positive and negative output equivalent resistances of the first connector body 10 are close, so that the overall overcurrent performance of the battery module will not be limited to a certain output electrode, and the overcurrent performance is improved. At the same time, the electrical connector only needs to slightly increase the size of the first positive terminal 11 under the same size space to achieve the purpose of improving the overcurrent performance.

[0034] It can be seen that the utility model can make use of the limited design size space of the electrical connector to enhance the overcurrent performance of the electrical connector when used in the battery module, thereby enhancing the cycle life of the battery module and thus enhancing the safety of the battery module.

[0035] Specifically, in this embodiment, since the battery module is usually equipped with a male plug, in the first electrical connector body, the front end of the first insulating shell 13 is configured as a male plug structure 131, and the first positive terminal 11 and the first negative terminal 12 are respectively provided with female terminal segments 41 for conductive plugging. Correspondingly, the connector assembly of this embodiment is also equipped with a second electrical connector body. Among them, the second connector body 20 includes a second insulating shell 23, and a second positive terminal 21 and a second negative terminal 22 arranged in parallel between the second insulating shell 23. The front end of the second insulating shell 23 is configured as a female plug structure 231, and the second positive terminal 21 and the second negative terminal 22 are respectively provided with male terminal segments 42 for conductive plugging.

[0036] In order to achieve the plug-in fit of the connector assembly, the male plug-in structure 131 of the first insulating housing 13 can be inserted and fixed in the female plug-in structure 231 of the second insulating housing 23. When the first insulating housing 13 and the second insulating housing 23 are plugged into each other, the inner diameter of the female terminal section 41 of the first positive terminal 11 is matched with the outer diameter of the male terminal section 42 of the second positive terminal 21, so that the first positive terminal 11 and the second positive terminal 21 are matched and plugged. Similarly, the inner diameter of the female terminal section 41 of the first negative terminal 12 is matched with the outer diameter of the male terminal section 42 of the second negative terminal 22, so that the first negative terminal 12 and the second negative terminal 22 are matched and plugged.

[0037] refer to Figure 1 and Figure 2 , the first insulating shell 13 and the second insulating shell 23 are roughly in the shape of a rectangular parallelepiped. A male plug structure 131 is provided at the front end of the first insulating shell 13, the first positive terminal 11 is provided on the left side of the male plug structure 131, and the first negative terminal 12 is provided on the right side of the male plug structure 131. In other words, the first positive terminal 11 and the second positive terminal 21 are arranged side by side in the left-right direction. In order to match the plug, a female plug structure 231 is provided at the front end of the second insulating shell 23, the second positive terminal 21 is provided on the right side of the female plug structure 231, and the second negative terminal 22 is provided on the left side of the female plug structure 231, so that the plug-in pairing between the first positive terminal 11 and the second positive terminal 21, and the plug-in pairing between the first negative terminal 12 and the second negative terminal 22. Due to the difference in the plug-in matching size, the reverse connection of the first connector body 10 and the second connector body 20 can be avoided. Furthermore, a chamfered structure 30 is provided at the lower right of the male plug structure 131 , and a chamfered structure 30 is provided at the lower left of the female plug structure 231 , thereby avoiding reverse connection between the first connector body 10 and the second connector body 20 .

[0038] refer to Figure 1 A positive pole mark is provided on the left side of the first insulating housing 13, indicating that the adjacent terminal is the first positive pole terminal 11. Figure 2 , a negative pole mark is provided on the right side of the first insulating housing 13, indicating that the adjacent terminal is the first negative pole terminal 12. As can be seen from the figure, the inner diameter of the first positive pole terminal 11 is larger than the inner diameter of the first negative pole terminal 12. Figure 1 A negative pole mark is provided on the left side of the second insulating housing 23, indicating that the adjacent terminal is the second negative pole terminal 22. Figure 2 A positive pole mark is provided on the right side of the second insulating housing 23, indicating that the adjacent terminal is the second positive pole terminal 21. As can be seen from the figure, the outer diameter of the second positive pole terminal 21 is greater than the outer diameter of the second negative pole terminal 22.

[0039] like Figure 4As shown, the first positive terminal 11 and the first negative terminal 12 are both female terminal structures. The first negative terminal 12 is similar, and taking the first positive terminal 11 as an example, the first positive terminal 11 is composed of a female terminal section 41, a fixing section 43 and a connecting section 44 from front to back.

[0040] The fixing section 43 of the first positive terminal 11 is used for fixed connection with the first insulating shell 13 in an integral molding. A circular annular groove 431 is provided on the fixing section 43 so that it can be inserted into the first insulating shell 13 during the integral molding. A planar notch 432 is provided at the bottom of the annular groove 431, which is used for positioning the first positive terminal 11 on the one hand and preventing the first positive terminal 11 from rotating on the other hand. The planar notch 432 of the first positive terminal 11 is opposite to the planar notch 432 of the first negative terminal 12.

[0041] The connecting section 44 of the first positive terminal 11 is provided with a planar groove 441 for welding to the electric wire. The planar groove 441 of the first positive terminal 11 and the planar groove 441 of the first negative terminal 12 are opposite to each other, so as to facilitate soldering of the first positive terminal 11 and the first negative terminal 12 respectively.

[0042] like Figure 5 As shown, the second positive terminal 21 and the second negative terminal 22 are both male terminal structures. The second negative terminal 22 is similar, and taking the second positive terminal 21 as an example, the second positive terminal 21 is composed of a male terminal section 42, a fixed section 43 and a connecting section 44 from front to back. The second positive terminal 21 is provided with a split seam so that the end is naturally forked, thereby increasing the conductive performance during plugging. It can be understood that, in this embodiment, the structure of the fixed section 43 and the connecting section 44 of the second positive terminal 21 is the same as the above-mentioned first positive terminal 11. In other embodiments, since the second connector body 20 is used for a charger, the connecting section 44 of the second positive terminal 21 and the connecting section 44 of the second negative terminal 22 can be configured as right-angle pin structures, respectively.

[0043] The above embodiments mainly describe the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An electrical connector capable of enhancing current flow performance, comprising a first connector body (10), characterized in that: The first connector body (10) comprises a first insulating shell (13), and a first positive terminal (11) and a first negative terminal (12) arranged in parallel between the first insulating shell (13), wherein the plug-in fitting size of the first positive terminal (11) is larger than the plug-in fitting size of the first negative terminal (12).

2. An electrical connector capable of enhancing current flow performance according to claim 1, characterized in that: The front end of the first insulating shell (13) is configured as a male connector structure (131); the first positive terminal (11) and the first negative terminal (12) are respectively provided with female terminal segments (41) for conductive connection; the inner diameter of the female terminal segment (41) of the first positive terminal (11) is greater than the inner diameter of the female terminal segment (41) of the first negative terminal (12).

3. An electrical connector capable of enhancing current flow performance according to claim 2, characterized in that: The first positive terminal (11) and the first negative terminal (12) are also respectively provided with a fixing section (43) for connecting to the first insulating shell (13); a circular groove (431) is provided on the fixing section (43); a plane notch (432) is provided at the bottom of the circular groove (431); the plane notch (432) of the first positive terminal (11) and the plane notch (432) of the first negative terminal (12) are opposite to each other.

4. An electrical connector capable of enhancing current flow performance according to claim 2, characterized in that: The first positive terminal (11) and the first negative terminal (12) are respectively integrally connected to the first insulating shell (13).

5. An electrical connector capable of enhancing current flow performance according to claim 4, characterized in that: The first positive terminal (11) and the first negative terminal (12) are also respectively provided with a connecting section (44) for extending from the rear end of the first insulating shell (13); a planar groove (441) is provided on the connecting section (44); the planar groove (441) of the first positive terminal (11) and the planar groove (441) of the first negative terminal (12) are opposite to each other.

6. The electrical connector capable of enhancing current flow performance according to claim 2, characterized in that: The male connector structure (131) of the first insulating housing (13) is provided with a chamfer structure (30) on one side relative to the parallel direction of the first positive terminal (11) and the first negative terminal (12).

7. The electrical connector capable of enhancing current flow performance according to claim 1, characterized in that: The first insulating shell (13) is marked with a positive pole near the first positive terminal (11), and the first insulating shell (13) is marked with a negative pole near the first negative terminal (12).

8. A connector assembly, comprising an electrical connector capable of enhancing current flow performance according to any one of claims 1 to 7, characterized in that: The invention also comprises a second connector body (20), wherein the second connector body (20) comprises a second insulating shell (23), and a second positive terminal (21) and a second negative terminal (22) arranged in parallel between the second insulating shell (23), wherein the plug-in fitting size of the second positive terminal (21) is larger than the plug-in fitting size of the second negative terminal (22), and the first insulating shell (13) and the second insulating shell (23) can be matched and plugged with each other; when the first insulating shell (13) and the second insulating shell (23) are plugged with each other, the first positive terminal (11) and the second positive terminal (21) are matched and plugged, and the first negative terminal (12) and the second negative terminal (22) are matched and plugged.

9. A connector assembly according to claim 8, characterized in that: The front end of the second insulating shell (23) is configured as a female plug structure (231), and the second positive terminal (21) and the second negative terminal (22) are respectively provided with a male terminal segment (42) for conductive plugging, and the outer diameter of the male terminal segment (42) of the second positive terminal (21) is greater than the outer diameter of the male terminal segment (42) of the second negative terminal (22).

10. A battery module, comprising an electrical connector capable of enhancing current flow performance according to any one of claims 1 to 7, characterized in that: It also includes a battery core and an electrical conductor, wherein the positive terminal of the battery core is connected to the first positive terminal (11) of the first connector body (10) through the electrical conductor, and the negative terminal of the battery core is connected to the second negative terminal (22) of the first connector body (10) through the electrical conductor.

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