Universal module high-voltage protection base

Abstract

The utility model provides a universal module high-voltage protection base, which belongs to the technical field of new energy automobile batteries, and is characterized in that on the basis of an original integrated injection-molded high-voltage protection base, the original integrated injection-molded high-voltage protection base is divided into an injection-molded high-voltage protection base body and a connecting piece of which the back is spot-welded with a welding nut; the number and the model of the welding nuts on the connecting piece can be changed according to actual conditions, the problems that an original high-voltage protection base on a new project cannot be used universally, a mold needs to be opened again, the mold cost and the product development cycle time are increased are avoided, meanwhile, the original mold development cost can be shared by the universality of the high-voltage protection base body, and a larger cost advantage is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle batteries, and in particular to a universal module high-voltage protection base. Background Art

[0002] Under the background of dual carbon, new energy vehicles are developing rapidly, and their market share is increasing. As a result, safety issues such as battery spontaneous combustion are becoming more and more serious. As an important part of new energy vehicles, the safety of the battery system directly affects the safety of the entire vehicle.

[0003] The module high-voltage protection base is installed on the upper part of the module end plate of the battery module, and is used to connect the connecting piece and provide insulation protection for it. At present, the conventional design of the module high-voltage protection base is an integrated design, that is, the embedded nuts are pre-embedded in advance, and the base body is injection molded at one time by an injection molding machine. The bolts passing through the bolt holes of the connecting piece are connected to the embedded nuts on the module high-voltage protection base. The contact area between the two is insufficient, and there may be insufficient current capacity and insufficient torque. Especially during the driving process of the whole vehicle, the embedded round nuts are prone to loosening, and the output pole piece and the module high-voltage protection base are loose, which seriously affects the performance of the battery module and then affects the performance of the whole vehicle;

[0004] In addition, different modules need to be matched with different module high-voltage protection bases. The increased mold opening costs and development cycle time required for redesign and development will put new energy manufacturers at a disadvantage in market competition. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is that the current flow capacity and torque of the module high-voltage protection base with an integrated design in the prior art are insufficient, and different modules need to be matched with different module high-voltage protection bases, which increases the mold opening costs and development cycle time due to redesign and development; the utility model provides a universal module high-voltage protection base to alleviate the problem of unreliable connection between the module connecting plate and the module high-voltage protection base in the prior art, while achieving the universality of the module high-voltage protection base, reducing subsequent development costs, and saving development cycle time.

[0006] To this end, the utility model provides a universal module high-voltage protection base, comprising a base body, wherein an inverted convex cavity is provided on the base;

[0007] A connecting piece is clamped in the inverted convex cavity; the connecting piece is used to increase the flow area between the electrical equipment and the battery module;

[0008] The limit buckle is arranged on the base body and is used to limit the connection piece from being separated from the base body.

[0009] Optionally, the connecting member includes:

[0010] A sheet of metal is clamped into the inverted convex cavity;

[0011] The welding nut is fixedly connected to the side of the plate metal away from the inverted convex cavity; the surface of the plate metal on the laser-cut connector is electrophoretically protected, and the welding nut is spot-welded to the back of the plate metal.

[0012] Optionally, the cross-section of the limiting buckle is a right triangle, one right-angled side of the limiting buckle is parallel to the bottom surface of the inverted convex cavity, the other right-angled side is perpendicular to the bottom surface of the inverted convex cavity, and the angle formed by the inclined side and the right-angled side perpendicular to the bottom surface of the inverted convex cavity is the inclination angle θ, and the inclination angle θ satisfies: 30°≤θ≤45°.

[0013] Optionally, the plate-shaped metal is made of stainless steel, and its size is smaller than the size of the upper portion of the inverted convex cavity.

[0014] Optionally, there are two limit buckles, which are symmetrically arranged on both sides of the inverted convex cavity, and the two limit buckles buckle and lock the two ends of the connector, so that they can be well limited on the horizontal plane.

[0015] Optionally, there is at least one welding nut, which is provided with an internal thread; the number of the welding nut on the back is not limited to one, and the inner diameter is not fixed, and can be changed according to the usage scenario required by the battery module.

[0016] Optionally, the base body is an injection molded high-voltage protection base body.

[0017] Optionally, the sheet metal is formed by laser cutting, the surface of the sheet metal is protected by electrophoresis, and the welding nut is welded to the back of the sheet metal by spot welding.

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

[0019] 1. The universal module high-voltage protection base provided by the utility model is divided into an injection-molded high-voltage protection base body and a connector with welded nuts on the back, based on the original one-piece injection-molded high-voltage protection base. The number and model of the welded nuts on the connector can be changed according to actual conditions, so as to avoid the original high-voltage protection base being incompatible with the new project and requiring a new mold, thereby increasing the mold cost and product development cycle time. At the same time, the universality of the high-voltage protection base body can spread the original mold development cost, thereby achieving greater cost advantages.

[0020] 2. Compared with the original one-piece injection-molded high-voltage protection base, the universal module high-voltage protection base provided by the utility model has bolts passing through the holes on the connecting plate and connected to the nuts embedded on the base, and its contact area is the flange surface area of ​​the embedded nut; while the technical solution adopted by the utility model, the contact area is the plate-shaped metal surface on the connecting component. The increased contact area can further improve the torque of the connecting plate and increase the stability of the connection between the connecting plate and the high-voltage protection base. At the same time, the flow area of ​​the connecting plate is increased, the electrical performance is improved, and the module safety is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 creative work.

[0022] Figure 1 A schematic structural diagram of a universal module high-voltage protection base and a module assembly provided in an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the structure of a universal module high voltage protection base provided by an embodiment of the utility model;

[0024] Figure 3 An exploded view of a universal module high voltage protection base provided by an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the structure of a universal module high voltage protection base body provided by an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of the structure of a universal module high voltage protection base connector provided by an embodiment of the utility model;

[0027] Figure 6 A partial enlarged view of the limit buckle and the inclination angle θ of the limit buckle on the inner wall of the universal module high-voltage protection base body provided by the embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 101. base body; 1011. inverted convex cavity; 1012. limit buckle; 102. connector; 1021. sheet metal; 1022. welding nut; 103. connector. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention;

[0032] In the description of the present utility model application, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", "connection", "clamping" and the like 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 the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model application can be understood according to specific circumstances.

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of the universal module high voltage protection base structure provided in this embodiment. Figure 1 As shown, the universal module high voltage protection base includes a base body 101, and an inverted convex cavity 1011 is provided on the base;

[0035] The connector 102 is clamped in the inverted convex cavity 1011; the connector 102 is used to increase the flow area between the electrical equipment and the battery module;

[0036] The limiting buckle 1012 is disposed on the base body 101 and is used to limit the connection member 102 from being separated from the base body 101 .

[0037] The universal module high-voltage protection base is based on the traditional one-piece injection-molded high-voltage protection base, and is divided into two parts: an injection-molded base body 101 and a connector 102. The base body 101 is connected to the module, wherein the module high-voltage protection base body 101 used between different modules remains unchanged, and the corresponding connector 102 is selected according to the flow capacity, torque and other parameters required by different modules, and is clamped in the inverted convex hollow cavity on the module high-voltage protection base body 101, so as to increase the flow area between the electrical equipment and the battery module, thereby eliminating the need to replace the high The high-voltage protection base is used to limit the connection part 102 from being separated from the base body 101 through the limiting buckle 1012; the high-voltage protection base body 101 is made of pure plastic material, and there are no embedded round nuts and other parts inside. The inverted convex hollow cavity and the limiting buckle 1012 are shaped on the high-voltage protection base body 101, and can be integrally processed and formed through the injection molding process. The module high-voltage protection base body 101 is a pure injection molded part, which can play an insulating and protective role for the output pole piece; the wall thickness of the high-voltage protection base body 101 should be kept as uniform as possible, and the uneven parts should be improved by setting reinforcing ribs and the like.

[0038] In this embodiment, the connecting member 102 includes:

[0039] The sheet metal 1021 is clamped in the inverted convex cavity 1011;

[0040] The welding nut 1022 is fixedly connected to a side of the sheet metal 1021 away from the inverted convex cavity 1011 .

[0041] The connector 102 is a metal assembly, which is composed of a laser-cut plate metal 1021 and a spot-welded weld nut 1022 on the back; the plate metal 1021 and the weld nut 1022 are both made of stainless steel, and the weld nut 1022 is a standard part, and different inner and outer diameters and numbers can meet the needs of different modules. At the same time, in order to meet the relevant requirements of the salt spray test, the surface of the plate metal 1021 needs to be electrophoresed;

[0042] The torsional strength of the welded nut 1022 spot-welded on the back is greater than the torsional strength of the embedded round nut of the same size and specification embedded in the injection-molded high-voltage protection base in the traditional solution, so it can withstand greater torque, and the stability of the high-voltage protection base and the connecting piece 103 connected to the welded nut 1022 is increased. At the same time, when installing the connecting piece 103, the contact area between the connecting piece 103 and the universal module high-voltage protection base is the surface area of ​​the plate metal 1021, which is much larger than the contact area in the traditional solution, which is the surface area of ​​the embedded round nut flange. The flow area with the connecting piece 103 is increased, and the electrical performance is better;

[0043] When the module is changed, the module high-voltage protection base body 101 can still be used. Only the size, position and number of the openings on the sheet metal 1021 need to be changed during laser cutting. At the same time, welding nuts 1022 of appropriate number and specifications are selected for spot welding to form new connecting parts, which are installed on the high-voltage protection base body 101 to form a universal module high-voltage protection base, effectively saving the injection mold development cost and development cycle time.

[0044] In this embodiment, the cross-section of the limiting buckle 1012 is a right triangle, and one right-angled side of the limiting buckle 1012 is parallel to the bottom surface of the inverted convex cavity 1011, and the other right-angled side is perpendicular to the bottom surface of the inverted convex cavity 1011. The angle formed by its inclined side and the right-angled side perpendicular to the bottom surface of the inverted convex cavity 1011 is the inclination angle θ, and the inclination angle θ satisfies: 30°≤θ≤45°.

[0045] The inclined surface on the limiting buckle 1012 faces the inverted convex cavity 1011. During the placement of the connecting piece 102, the connecting piece 102 can be moved along the inclined surface into the inverted convex cavity 1011. When the connecting piece 102 is inserted into the inverted convex cavity 1011, the right-angled edge on the limiting buckle 1012 parallel to the bottom surface of the inverted convex cavity 1011 limits the connecting piece 102 to prevent it from escaping from the inverted convex cavity 1011.

[0046] In this embodiment, the sheet metal 1021 is made of stainless steel, and its size is smaller than the size of the upper portion of the inverted convex cavity 1011 .

[0047] The size of the sheet metal 1021 is slightly smaller than that of the inverted convex cavity 1011 , which can ensure that the sheet metal 1021 can be placed in the inverted convex cavity 1011 and that the side wall of the inverted convex cavity 1011 can fix the sheet metal 1021 .

[0048] In this embodiment, there are two limit buckles 1012, which are symmetrically arranged on both sides of the inverted convex cavity 1011. Figure 3 As shown, when the connector 102 is placed transversely in the inverted convex cavity 1011 , the distance between the two limiting buckles 1012 is smaller than the length of the sheet metal 1021 , so that the two limiting buckles 1012 can buckle and lock the two ends of the connector 102 .

[0049] The symmetrically arranged limiting buckles 1012 can limit the two sides of the sheet metal 1021 , thereby improving the stability of the sheet metal 1021 after being inserted into the inverted convex cavity 1011 .

[0050] In this embodiment, there is at least one welding nut 1022, which is provided with an internal thread; the number of the welding nut 1022 on the back is not limited to one, and the inner diameter thereof is not fixed, and can be changed according to the usage scenario required by the battery module.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A universal module high voltage protection base, characterized in that: include: A base body (101), wherein an inverted convex cavity (1011) is provided on the base; A connecting piece (102) is snap-fitted into the inverted convex cavity (1011); the connecting piece (102) is used to increase the flow area between the electrical equipment and the battery module; The limiting buckle (1012) is arranged on the base body (101) and is used to limit the connection member (102) from being separated from the base body (101).

2. The universal module high voltage protection base according to claim 1, characterized in that: The connecting member (102) comprises: A sheet metal (1021) is clamped into the inverted convex cavity (1011); The welding nut (1022) is fixedly connected to a side of the plate-shaped metal (1021) away from the inverted convex cavity (1011).

3. The universal module high voltage protection base according to claim 1, characterized in that: The cross section of the limiting buckle (1012) is a right triangle, one right-angled side of the limiting buckle (1012) is parallel to the bottom surface of the inverted convex cavity (1011), the other right-angled side is perpendicular to the bottom surface of the inverted convex cavity (1011), and the angle formed by the inclined side and the right-angled side perpendicular to the bottom surface of the inverted convex cavity (1011) is an inclined angle θ, and the inclined angle θ satisfies: 30°≤θ≤45°.

4. The universal module high voltage protection base according to claim 2, characterized in that: The plate-shaped metal (1021) is made of stainless steel, and its size is smaller than the size of the upper portion of the inverted convex cavity (1011).

5. The universal module high voltage protection base according to claim 3, characterized in that: There are two limit buckles (1012), which are symmetrically arranged on both sides of the inverted convex cavity (1011), and the two limit buckles (1012) buckle and lock the two ends of the connecting member (102).

6. The universal module high voltage protection base according to claim 2, characterized in that: There is at least one welding nut (1022), which is provided with an internal thread.

7. The universal module high voltage protection base according to claim 1, characterized in that: The base body (101) is an injection-molded high-voltage protection base body.

8. The universal module high voltage protection base according to claim 2, characterized in that: The plate-shaped metal (1021) is formed by laser cutting, the surface of the plate-shaped metal (1021) is electrophoretically protected, and the welding nut (1022) is welded to the back of the plate-shaped metal (1021) by spot welding.

Images