Replaceable collection harness plug-in connection structure and power battery module

Abstract

A plug-in connection structure for a replaceable collection harness and a power battery module belong to the field of power battery technology. By designing the plug-in portion into a double-layer structure consisting of a main body and a reinforcing plate, the thickness of the plug-in portion is increased, thereby enhancing the structural strength of the plug-in portion and making the plug-in portion more resistant to insertion and removal. When the plug-in portion is inserted into the insertion cavity, the elastic support portion abuts against the inner wall of the insertion cavity to provide elastic support force. The elastic support portion enhances the fatigue resistance of the first spring plate, making the first spring plate more elastic, thereby firmly inserting the plug-in portion into the insertion cavity. Furthermore, the coordinated connection of the first anti-retraction portion and the second anti-retraction portion effectively prevents the plug-in portion from withdrawing from the insertion cavity, thereby ensuring more stable contact between the plug-in portion and the insertion cavity, thereby resolving the problem of sudden changes in the contact resistance between the female and male terminals due to vibration. The plug-in portion is pressed at the press opening to disengage the second anti-retraction portion from the first anti-retraction portion. The plug-in portion is then removed from the insertion cavity and replaced with a new female or male terminal.

Description

Technical Field

[0001] The present invention belongs to the technical field of power batteries, and in particular relates to a plug-and-socket connection structure of a replaceable collection harness and a power battery module. Background Art

[0002] Compared to traditional small-module packs, CTP / CTC non-modular packs have significantly higher after-sales scrapping costs. While the cost of the data acquisition harness is significantly lower than that of traditional small modules and CTC packs, the highest rate of module repair or scrapping is due to abnormal voltage or temperature sensing in the data acquisition harness, forcing the entire battery module or pack to be returned for repair or scrapped. Currently available products with interchangeable data acquisition male and female terminals do not meet the reliability requirements of new energy power battery applications.

[0003] The contact resistance of the male and female terminals currently on the market is relatively large, and the contact resistance fluctuates due to the vibration caused by the operation of the vehicle, which causes the voltage signal to jump when the BMS collects the voltage signal, making it impossible to truly judge the authenticity of the battery module / PACK's power level and the safety status of the battery / PACK. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a plug-in connection structure of a replaceable collection harness and a power battery module, aiming to solve the problem of contact resistance jump caused by vibration of the plug-in male and female terminals.

[0005] To achieve the above objectives, the technical solution adopted in this application is to provide a plug-in connection structure of a replaceable collection harness, comprising:

[0006] The female terminal has a plug-in cavity at the front end and a first welding portion at the rear end; the inner wall of the plug-in cavity is provided with a first anti-retraction portion and a pressing opening;

[0007] a first spring piece, wherein the front end of the first spring piece is connected to the front end of the female terminal, the rear end of the first spring piece extends toward the plug-in cavity and is suspended in the plug-in cavity and close to the pressing opening, and the tail of the rear end of the first spring piece is bent to form an elastic support portion; and

[0008] The male terminal has a plug-in portion at the rear end and a second welding portion at the front end; the plug-in portion includes a main body and a reinforcing plate provided on the surface of the main body, and the reinforcing plate is provided with a second anti-retraction portion;

[0009] In the plug-in state, the plug-in portion is inserted into the plug-in cavity, the main body abuts against the first elastic sheet, causing the first elastic sheet to undergo elastic deformation, and the elastic support portion abuts against the inner wall of the plug-in cavity to provide an elastic support force; when the second anti-retreat portion reaches the position of the first anti-retreat portion, under the elastic force of the first elastic sheet and the elastic support force of the elastic support portion, the second anti-retreat portion cooperates with the first anti-retreat portion to prevent the plug-in portion from exiting the plug-in cavity, and the outer surface of the reinforcing plate contacts the inner wall of the plug-in cavity;

[0010] In the separated state, the reinforcing plate is pressed at the pressing opening to cause the first elastic piece to undergo elastic deformation, so that the second anti-retraction portion is separated from the first anti-retraction portion, and the plug-in portion is pulled out of the plug-in cavity.

[0011] In one embodiment, first baffles are punched out on both sides of the front end of the female terminal, and each of the first baffles includes a vertical baffle portion bent upward by 90° on the side face of the front end of the female terminal and a horizontal baffle portion bent inward by 90° at the end of the vertical baffle portion. The plug-in cavity is formed between the inner sides of the two first baffles; the press opening is formed between the two horizontal baffle portions; and the first anti-retreat portion is provided on each of the horizontal baffle portions.

[0012] In one embodiment, there are two reinforcing plates, which are respectively bent upward 180° on the two side surfaces of the main body. Each reinforcing plate is provided with the second anti-retreat portion. In the plugged state, each second anti-retreat portion is respectively connected to the corresponding first anti-retreat portion.

[0013] In one embodiment, side surfaces of the two second reinforcing plates are in conflict with each other.

[0014] In one embodiment, the first anti-retreat portion is a card slot, and correspondingly, the second anti-retreat portion is a second spring piece, which is punched out on the reinforcing plate. In the plugged-in state, the second spring piece elastically deforms against the inner wall of the plug-in cavity. When the second spring piece reaches the card slot position, the second spring piece bounces into the card slot under its own elastic action and locks with the card slot.

[0015] In one embodiment, the second elastic piece and the front end surface of the reinforcing plate are formed by punching and then bending upward.

[0016] In one embodiment, the rear ends of the two horizontal sidewalls are bent downward to form a second baffle, and the second baffle is located at the rear end opening of the plug-in cavity.

[0017] In one embodiment, both side surfaces of the rear end of the main body are provided with guiding bevels, and the guiding bevels are arranged at 135°.

[0018] In one embodiment, the first spring piece is formed by punching and bending at the bottom of the front end surface of the plug-in cavity, and the first spring piece includes a bent connection part, a guide bevel part, a horizontal anti-vibration pressing part and the elastic support part which are integrally formed in sequence; in the plug-in state, the plug-in part transitions to the horizontal anti-vibration pressing part under the guiding action of the guide bevel part, and under the elastic force of the spring piece itself, the horizontal anti-vibration pressing part presses the bottom surface of the plug-in part so that the top surface of the plug-in part is tightly in contact with the inner wall of the plug-in cavity; the elastic support part is bent downward at the rear end of the horizontal anti-vibration pressing part and is formed toward the bent connection part.

[0019] A power battery module comprises the plug-and-socket connection structure of the replaceable collection harness.

[0020] The beneficial effects of the present application are: by designing the plug-in part into a double-layer structure of a main body and a reinforcing plate, the thickness of the plug-in part is increased, that is, the structural strength of the plug-in part is enhanced, and the plug-in part is more resistant to plugging and unplugging; the plug-in part is inserted into the plug-in cavity and abuts against the first spring piece. Since the plug-in part is a double-layer structure, the elastic deformation of the first spring piece is greater, that is, the elastic force of the first spring piece is greater. At the same time, the elastic support part will abut against the inner wall of the plug-in cavity to provide elastic support force. The elastic support part enhances the fatigue resistance of the first spring piece, improves the service life of the first spring piece, and makes the elastic force of the first spring piece greater, so that the plug-in part is very firmly plugged into the plug-in cavity, and under the cooperative connection of the first anti-retraction part and the second anti-retraction part, the plug-in part is effectively prevented from withdrawing from the plug-in cavity, thereby making the plug-in part and the plug-in cavity more firmly contacted, thereby solving the problem of jump in contact resistance between the female terminal and the male terminal caused by vibration, and ensuring the authenticity of the collected data.

[0021] When one of the female terminal and the male terminal is damaged, the plug-in part is pressed at the pressing opening to cause the first spring sheet to undergo elastic deformation, so that the second anti-retraction part is separated from the first anti-retraction part, the plug-in part is pulled out of the plug-in cavity, and a new female terminal or male terminal can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Provides a first angle stereogram of the embodiment of the present application in which the female terminal and the male terminal are separated;

[0024] Figure 2Provides a second angle stereogram of the embodiment of the present application in which the female terminal and the male terminal are separated;

[0025] Figure 3 A three-dimensional diagram of a female terminal and a male terminal in a plugged-in state is provided for an embodiment of the present application;

[0026] Figure 4 A cross-sectional view of a female terminal and a male terminal in a plugged-in state is provided for an embodiment of the present application;

[0027] Figure 5 A three-dimensional diagram of a female terminal is provided for an embodiment of the present application;

[0028] Figure 6 A three-dimensional diagram of a male terminal is provided for an embodiment of the present application.

[0029] Among them, the reference numerals in the figures are:

[0030] 10. Female terminal 11. Connecting cavity

[0031] 12. First welding portion 13. First anti-retraction portion (slot)

[0032] 14. Press the opening 15. First baffle

[0033] 151. Vertical rib 152. Horizontal rib

[0034] 153, second baffle 20, first spring

[0035] 21. Elastic support portion 22. Bend connection portion

[0036] 23. Guide bevel part 24. Horizontal vibration-proof pressing part

[0037] 30. Male terminal 31. Connecting part

[0038] 311, main body 312, reinforcement plate

[0039] 313, guide bevel 32, second welding part

[0040] 33. Second anti-retreat portion (second spring piece). DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0042] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0045] See also Figures 1 to 6 , an embodiment of the present application provides a plug-in connection structure of a replaceable collection harness, comprising:

[0046] like Figure 1 and Figure 2 As shown, the female terminal 10 has a plug-in cavity 11 at the front end and a first welding portion 12 at the rear end; a first anti-retraction portion 13 and a pressing opening 14 are provided on the inner wall of the plug-in cavity 11; it can be understood that the first anti-retraction portion 13 and the pressing opening 14 are on the same side wall of the plug-in cavity 11, or the first anti-retraction portion 13 and the pressing opening 14 are on different side walls of the plug-in cavity 11.

[0047] The first spring piece 20 has a front end connected to the front end of the female terminal 10, and a rear end extending toward the plug cavity 11 and hanging inside the plug cavity 11, and close to the pressing opening 14. The rear end of the first spring piece 20 is bent to form an elastic support portion 21. And,

[0048] The male terminal 30 has a plug-in portion 31 at the rear end and a second welding portion 32 at the front end. The plug-in portion 31 includes a main body 311 and a reinforcing plate 312 provided on the surface of the main body. The reinforcing plate 312 is provided with a second anti-retraction portion 33.

[0049] like Figure 3 Shown and Figure 4As shown, in the mating state, the plug-in portion 31 is inserted into the plug-in cavity 11, and the main body 311 abuts against the first spring piece 20, causing the first spring piece 20 to undergo elastic deformation. At the same time, the elastic support portion 21 moves downward and abuts against the inner wall of the plug-in cavity 31 to provide elastic support force. The elastic support portion 21 enhances the fatigue resistance of the first spring piece 20, increases the service life of the first spring piece 20, and makes the first spring piece 20 more elastic. When the second anti-retraction portion 33 reaches the position of the first anti-retraction portion 13, under the elastic force of the first spring piece 20 and the elastic support force of the elastic support portion 21, the second anti-retraction portion 33 cooperates with the first anti-retraction portion 13 to prevent the plug-in portion 31 from withdrawing from the plug-in cavity 11, and the outer surface of the reinforcing plate 312 contacts the inner wall of the plug-in cavity 11.

[0050] like Figure 1 and Figure 2 As shown, in the separation state, the reinforcing plate 312 is pressed at the pressing opening 14 to cause the first elastic piece 20 to elastically deform, so that the second anti-retraction portion 33 is separated from the first anti-retraction portion 13 and the plug-in portion 31 is pulled out of the plug-in cavity 11 .

[0051] By designing the plug-in portion 31 as a double-layer structure of the main body 311 and the reinforcing plate 312, the thickness of the plug-in portion 31 is increased, that is, the structural strength of the plug-in portion 31 is enhanced, and the plug-in portion 31 is more resistant to plugging and unplugging; the plug-in portion 31 is inserted into the plug-in cavity 11 and abuts against the first elastic piece. Since the plug-in portion 31 is a double-layer structure, the elastic deformation of the first elastic piece 20 is greater, that is, the greater the elastic force of the first elastic piece 20, and at the same time, the elastic support portion 21 abuts against the inner wall of the plug-in cavity 11 to provide elastic support force, and the elastic support portion 21 The fatigue resistance of the first spring piece 20 is enhanced, the service life of the first spring piece 20 is increased, and the elastic force of the first spring piece 20 is made greater, so that the plug-in part 31 is very firmly plugged into the plug-in cavity 11, and under the cooperative connection of the first anti-retraction part 13 and the second anti-retraction part 33, the plug-in part 31 is effectively prevented from withdrawing from the plug-in cavity 11, thereby making the plug-in part 31 more firmly in contact with the plug-in cavity, thereby solving the problem of jump in contact resistance between the female terminal and the male terminal due to vibration, and ensuring the authenticity of the collected data.

[0052] When one of the female terminal 10 and the male terminal 30 is damaged, the plug-in portion is pressed at the pressing opening 14 to cause the first spring piece 20 to undergo elastic deformation, so that the second anti-retraction portion 33 is separated from the first anti-retraction portion 13, and the plug-in portion 31 is pulled out of the plug-in cavity 11, and a new female terminal 10 or male terminal 30 can be replaced.

[0053] For example, this plug-in structure can be used to collect voltage or temperature. The first welding portion 12 on the female terminal is welded to the busbar on the battery module, and the female terminal surface is fully nickel-plated to prevent metal oxidation. The second welding portion 32 on the male terminal is welded to the collection harness. The male terminal 30 is entirely nickel-plated, and the second welding portion 32 is nickel-plated and tin-plated.

[0054] Optionally, the female terminal 10 and the male terminal 30 are copper sheets or nickel sheets.

[0055] Exemplarily, the plug-in portion 31 is in the shape of a flat plate, and its contact area with the plug-in cavity 11 is large, thereby effectively reducing the contact resistance between the male terminal and the female terminal.

[0056] like Figure 1 and Figure 2 and Figure 5 As shown, first baffles 15 are punched out on both sides of the front end of the female terminal 10. Each first baffle 15 includes a vertical rib 151 bent upward 90° from the side of the front end of the female terminal 10, and a horizontal rib 152 bent inward 90° at the end of the vertical rib. The inner side surfaces of the two first baffles 15 form the insertion cavity 11. A pressing opening 14 is formed between the two horizontal ribs 152; each horizontal rib 152 is provided with a first anti-retraction portion 13. It can be understood that the longitudinal cross-sectional area of ​​the insertion cavity 11 is rectangular, which allows the plug portion 31 to contact the insertion cavity 11 over a large area, ensuring contact stability.

[0057] like Figure 1 、 2 As shown in Figure 6, there are two reinforcing plates 312, each of which is formed by bending upward 180 degrees on the two side surfaces of the main body 311. Each reinforcing plate 312 is provided with a second anti-retraction portion 33. When inserted into the main body, each second anti-retraction portion 33 is connected to the corresponding first anti-retraction portion 13. By punching and bending the reinforcing plates 312 and the side surfaces of the main body 311, production costs are effectively reduced.

[0058] Optionally, the reinforcing plate 312 also can be welded on the main body 311, or, use other connecting structures to be located on the main body. Also, the reinforcing plate 312 can also be a piece, and when the reinforcing plate 312 is a piece, the two sides are flush with the two sides of the main body.

[0059] The side surfaces of the two second reinforcing plates 312 are in contact with each other, thereby effectively preventing the two second reinforcing plates 312 from being deformed when plugged in, and ensuring the contact stability between the plug-in portion 31 and the plug-in cavity 11 .

[0060] The first anti-retraction portion 13 is a slot 13, and correspondingly, the second anti-retraction portion 33 is a second spring piece 33. The second spring piece 33 is formed by punching on the reinforcing plate 312. In the plugged state, the second spring piece 33 elastically deforms against the inner wall of the plug-in cavity 11. When the second spring piece 33 reaches the slot 13, it springs into the slot 13 under its own elastic action and snaps into the slot 13. By directly punching and bending the second spring piece 33 on the reinforcing plate 312, the structure is more stable and simpler than traditional welded spring pieces. Moreover, the second spring piece 33 is punched and bent on the reinforcing plate 312, which is different from the traditional punching method that may be formed in the middle of the main body 311, and it will not damage the structural strength of the main body 311.

[0061] Exemplarily, the first anti-retreat portion 13 and the second anti-retreat portion 33 may also be other matching connection structures, such as the matching of a spring pin and a hole.

[0062] The second elastic piece 33 and the front end surface of the reinforcing plate 312 are formed by punching and then bending upward, which will not damage the structural strength of the reinforcing plate 312.

[0063] The rear ends of the two horizontal ribs 152 are bent downward to form a second baffle 153, which is located at the rear end opening of the insertion cavity 11. The two horizontal ribs 152 prevent the insertion portion 31 from being over-inserted.

[0064] Both sides of the rear end of the main body 311 are provided with guiding bevels 313 , and the guiding bevels 313 are arranged at an angle of 135°, which facilitates the insertion of the plug-in portion 31 into the plug-in cavity 11 .

[0065] like Figure 4 As shown, the first spring piece 20 is formed by punching and bending at the bottom of the front end surface of the plug-in cavity 11. The first spring piece 20 includes a bent connection portion 22, a guide bevel portion 23, a horizontal anti-vibration pressing portion 24, and an elastic support portion 21, which are integrally formed in sequence. In the plugged state, the plug-in portion 31 transitions to the horizontal anti-vibration pressing portion 24 under the guidance of the guide bevel portion 23, and under the elastic force of the first spring piece 20 itself, the horizontal anti-vibration pressing portion 24 presses the bottom surface of the plug-in portion 31, so that the top surface of the plug-in portion 31 is in close contact with the inner wall of the plug-in cavity 11, avoiding the plug-in portion from jumping due to vibration; the elastic support portion 31 is bent downward at the rear end of the horizontal anti-vibration pressing portion 24 and formed toward the bent connection portion 22. The spring piece 20 of this structure has a large elastic force and a long service life. The first spring piece is formed by punching at the front end surface of the plug-in cavity 11. Compared with the traditional method of welding spring pieces in the plug-in cavity 11, the traditional spring pieces are relatively small due to limited welding space. The first spring piece is formed by punching, so its area can be made large enough to ensure the contact area, reduce the resistance between the first terminal 10 and the second terminal 30, and ensure the stability of the contact.

[0066] The present invention also proposes a power battery module, including the plug-in connection structure of the above-mentioned replaceable collection harness. The specific structure of the power battery module refers to the above-mentioned embodiment. Since the present invention adopts all the technical solutions of all the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A plug-in connection structure of a replaceable collection harness, characterized in that: include: The female terminal has a plug-in cavity at the front end and a first welding portion at the rear end; the inner wall of the plug-in cavity is provided with a first anti-retraction portion and a pressing opening; a first spring piece, wherein the front end of the first spring piece is connected to the front end of the female terminal, the rear end of the first spring piece extends toward the plug-in cavity and is suspended in the plug-in cavity and close to the pressing opening, and the tail of the rear end of the first spring piece is bent to form an elastic support portion; and The male terminal has a plug-in portion at the rear end and a second welding portion at the front end; the plug-in portion includes a main body and a reinforcing plate provided on the surface of the main body, and the reinforcing plate is provided with a second anti-retraction portion; In the plug-in state, the plug-in portion is inserted into the plug-in cavity, the main body abuts against the first elastic sheet, causing the first elastic sheet to undergo elastic deformation, and the elastic support portion abuts against the inner wall of the plug-in cavity to provide an elastic support force; when the second anti-retreat portion reaches the position of the first anti-retreat portion, under the elastic force of the first elastic sheet and the elastic support force of the elastic support portion, the second anti-retreat portion cooperates with the first anti-retreat portion to prevent the plug-in portion from exiting the plug-in cavity, and the outer surface of the reinforcing plate contacts the inner wall of the plug-in cavity; In the separation state, the reinforcing plate is pressed at the pressing opening to cause the first elastic piece to undergo elastic deformation, so that the second anti-retraction portion is separated from the first anti-retraction portion, and the plug-in portion is pulled out of the plug-in cavity; Both sides of the front end of the female terminal are punched to form a first baffle, each of the first baffles includes a vertical rib portion bent 90° upward at the side surface of the front end of the female terminal and a horizontal rib portion bent 90° inward at the end of the vertical rib portion, the plug-in cavity is formed between the inner sides of the two first baffles; the pressing opening is formed between the two horizontal ribs; each horizontal rib is provided with the first anti-retraction portion; There are two reinforcing plates, each of which is bent upward 180 degrees on the two side surfaces of the main body. Each reinforcing plate is provided with a second anti-retraction portion. When the second anti-retraction portion is inserted into the main body, the second anti-retraction portion is connected to the corresponding first anti-retraction portion. Both sides of the rear end of the main body are provided with guiding bevels, and each guiding bevel is arranged at 135 degrees; The first spring piece is formed by punching and bending at the bottom of the front end surface of the plug-in cavity, and the first spring piece includes a bent connection part, a guide bevel part, a horizontal anti-vibration pressing part and the elastic support part which are integrally formed in sequence; in the plug-in state, the plug-in part transitions to the horizontal anti-vibration pressing part under the guiding action of the guide bevel part, and under the elastic force of the first spring piece itself, the horizontal anti-vibration pressing part presses the bottom surface of the plug-in part so that the top surface of the plug-in part is in close contact with the inner wall of the plug-in cavity; the elastic support part is bent downward at the rear end of the horizontal anti-vibration pressing part and is formed toward the bent connection part.

2. The plug-in connection structure of the replaceable collection harness according to claim 1, characterized in that: The side surfaces of the two reinforcing plates are in conflict with each other.

3. The plug-in connection structure of the replaceable collection harness according to claim 1, characterized in that: The first anti-retreat portion is a card slot, and correspondingly, the second anti-retreat portion is a second spring piece. The second spring piece is punched out on the reinforcing plate. In the plugged-in state, the second spring piece presses against the inner wall of the plug-in cavity and undergoes elastic deformation. When the second spring piece reaches the card slot position, the second spring piece bounces into the card slot under its own elastic action and is locked with the card slot.

4. The plug-in connection structure of the replaceable collection harness according to claim 3, characterized in that: The second elastic piece and the front end surface of the reinforcing plate are formed by punching and then bending upward.

5. The plug-in connection structure of the replaceable collection harness according to claim 1, characterized in that: The rear ends of the two horizontal sidewalls are bent downward to form a second baffle, and the second baffle is located at the rear end opening of the plug-in cavity.

6. A power battery module, characterized in that: include: The plug-in connection structure of the replaceable collection harness according to any one of claims 1 to 5.

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