Fixing structure for cooling BDU inverted relay and battery pack thereof

Abstract

The utility model discloses a fixing structure for cooling a BDU inverted relay and a battery pack thereof. The fixing structure of the cooling BDU inverted relay comprises a shell used for installing a plurality of relays, the top of each relay and the inner wall of the top of the shell are elastically pressed through an elastic piece, each elastic piece comprises two elastic pieces, the two elastic pieces are symmetrically distributed on the two sides of the relay, and the two elastic pieces are arranged on the two sides of the shell. Each elastic sheet comprises a mounting part and a plurality of elastic pressing parts, the mounting part is connected to the shell, the elastic pressing parts are all connected to the mounting part, each elastic pressing part is of an arc-shaped structure with an upward opening, and the elastic pressing parts are connected to the mounting part. And the bottom of each elastic pressing part is elastically pressed to the top of the relay. According to the utility model, the inner wall of the top of the shell carries out multi-point elastic pressing and limiting on the relay through the plurality of elastic pressing parts in the elastic piece, so that the limiting stability of the relay is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery pack especially relates to a fixed structure of cooling BDU inverted relay and battery pack thereof. BACKGROUND

[0002] With the further development of electric vehicle market and technology, charging time has become an obstacle to further expand the market of electric vehicles. Therefore, improving the charging power and reducing the charging time have become the urgent needs of consumers and the technical problems that a series of related enterprises need to solve. High-current charging is one of the directions to solve this problem. As the core electrical component of BDU / PDU to realize power-on and power-off functions, the relay cannot infinitely improve the performance due to the cost and size constraints. Considering the space layout, the current common solution is to invert the relay, cool the copper nose with the bottom water-cooled plate, reduce the temperature of the relay when passing through a large current, reduce the failure risk, and prolong the service life.

[0003] At present, the common inverted relay fixing methods include upper cover injection molding structure and spring fixing. However, both methods have disadvantages. The upper cover injection molding structure is prone to plastic creep after a long time under stress, which weakens the fixing effect and affects the stability and service life of the relay. Although the spring fixing method can effectively avoid the creep problem, the spring needs to be assembled separately, which increases the complexity and cost of the production process. In addition, the single-point compression interference fixing method also has a failure risk. Once the fixing point loosens or is damaged, the entire relay will lose vertical stability, thereby affecting its normal work. SUMMARY

[0004] In view of the above problems of the existing relay fixing, the present application aims to provide a fixed structure of cooling BDU inverted relay with high stability and long service life and a battery pack thereof.

[0005] The specific technical solutions are as follows:

[0006] A fixed structure of cooling BDU inverted relay, comprising: a shell for installing a plurality of relays, each top of the relays is elastically pressed between the top of the shell and the inner wall of the shell by an elastic piece, each elastic piece comprises two elastic sheets, the two elastic sheets are symmetrically distributed on both sides of the relay, and each elastic sheet comprises:

[0007] a mounting portion connected to the shell;

[0008] a plurality of elastic pressing portions, each elastic pressing portion is an arc structure with an opening facing the bottom, and the bottom of each elastic pressing portion is elastically pressed to the top of the relay.

[0009] As a further improvement and optimization of the scheme, the shell comprises a bottom shell and an upper cover, a plurality of the relays are arranged between the bottom shell and the upper cover, and the bottom shell and the upper cover are connected through bolts, and the mounting part is embedded into the bottom of the upper cover.

[0010] As a further improvement and optimization of the scheme, the mounting part is injection molded into the bottom of the upper cover.

[0011] As a further improvement and optimization of the scheme, the mounting part is a rectangular sheet structure.

[0012] As a further improvement and optimization of the scheme, the mounting part has a plurality of holes.

[0013] As a further improvement and optimization of the scheme, the two mounting parts of each elastic piece are connected with a plurality of elastic pressing parts on the side close to each other.

[0014] As a further improvement and optimization of the scheme, two elastic pressing parts are connected to each mounting part.

[0015] As a further improvement and optimization of the scheme, the two elastic pressing parts are respectively located on the two sides of the mounting part.

[0016] As a further improvement and optimization of the scheme, the plurality of elastic pressing parts and the mounting part are an integrated structure.

[0017] As a further improvement and optimization of the scheme, the upper cover has a plurality of avoiding openings, and the plurality of avoiding openings are distributed one-to-one with the plurality of elastic pressing parts.

[0018] A battery pack comprising the fixing structure of the cooling BDU inverted relay.

[0019] The technical scheme has the following advantages compared with the prior art:

[0020] (1) The top inner wall of the shell in the utility model is provided with a plurality of elastic pressing parts in the elastic piece, which can multi-point elastically hold and limit the relay, thereby improving the limiting stability of the relay.

[0021] (2) The elastic pressing part in the utility model is an arc structure with an upward opening, which can not only ensure the elastic deformation effect when the elastic pressing part and the relay are in contact, but also can avoid scratching the surface of the relay.

[0022] (3) The mounting part in the utility model can press and limit the relay through a plurality of elastic pressing parts, the elastic sheet is dispersedly stressed, and the damage of the upper cover caused by stress concentration is avoided.

[0023] (4) The utility model discloses a mounting portion injection molding to the bottom of the upper cover, need not to assemble separately, improve the assembly efficiency of overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is the explosion schematic view of the fixing structure of the cooling BDU inverted relay of the utility model;

[0025] Fig. 2 It is the structure schematic view of the elastic member of the fixing structure of the cooling BDU inverted relay of the utility model;

[0026] Fig. 3 It is the upper cover and relay cooperation schematic view of the fixing structure of the cooling BDU inverted relay of the utility model;

[0027] In the drawing, 1, relay;2, elastic member;3, shell;21, elastic sheet;31, bottom shell;32, upper cover;211, mounting portion;212, elastic compression portion;213, hole body;321, avoiding mouth. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of protection of the utility model.

[0029] In the description of the utility model, it needs to be explained that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. appear, the indicated orientation or position relation based on the orientation or position relation shown in the drawing is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, if the terms "first", "second", "third" appear, they are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the utility model, it needs to be explained that unless another explicit provision and limitation appear, if the terms "mounting", "connecting", "connection" appear, they should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;Can be directly connected, can be indirectly connected through intermediate medium, can be the communication inside two elements. For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] Fig. 1 It is an explosion schematic view of the fixing structure of the cooling BDU inverted relay of the utility model, Fig. 2 It is a structure schematic view of the elastic piece of the fixing structure of the cooling BDU inverted relay of the utility model, Fig. 3 It is a top cover and relay cooperation schematic view of the fixing structure of the cooling BDU inverted relay of the utility model, Figs. 1-3 As shown in the figure, a fixing structure of a cooling BDU inverted relay 1 of a preferred embodiment is shown, comprising: a shell 3 for mounting a plurality of relays 1, and each relay 1 is elastically pressed between the top of the shell 3 and the inner wall of the top of the shell 3 by an elastic piece 2, and each elastic piece 2 comprises two elastic sheets 21, and the two elastic sheets 21 are symmetrically distributed on both sides of the relay 1, and each elastic sheet 21 comprises: a mounting portion 211 and a plurality of elastic pressing portions 212, the mounting portion 211 is connected to the shell 3, and the plurality of elastic pressing portions 212 are connected to the mounting portion 211, and each elastic pressing portion 212 is an arc structure with an upward opening, and the bottom of each elastic pressing portion 212 is elastically pressed to the top of the relay 1.

[0032] In the embodiment, the top inner wall of the shell 3 elastically holds and limits the relay 1 by the plurality of elastic pressing portions 212 in the elastic piece 2, thereby improving the limiting stability of the relay 1.

[0033] In the embodiment, the elastic pressing portion 212 is an arc structure with an upward opening, which not only ensures the elastic deformation effect when the elastic pressing portion is in contact with the relay 1, but also avoids scratching the surface of the relay 1.

[0034] Specifically, the elastic sheet 21 is a metal elastic sheet 21.

[0035] Further, as a preferred embodiment, the shell 3 comprises a bottom shell 31 and an upper cover 32, a plurality of relays 1 are arranged between the bottom shell 31 and the upper cover 32, and the bottom shell 31 and the upper cover 32 are connected by bolts, and the mounting portion 211 is embedded into the bottom of the upper cover 32, and in the embodiment, the multi-point limiting mode can avoid single-point limiting failure, resulting in bolt untwisting, excessive contact resistance, and rapid temperature rise, thereby causing the risk of melting of the shell 3.

[0036] Further, as a preferred embodiment, the mounting portion 211 is injection molded into the bottom of the upper cover 32, without the need for separate assembly, thereby improving the assembly efficiency of the overall structure.

[0037] In the embodiment, the mounting portion 211 elastically holds and limits the relay 1 by the plurality of elastic pressing portions 212, and the elastic sheet 21 is dispersedly stressed, thereby avoiding concentrated stress damage to the upper cover 32.

[0038] Further, as a preferred embodiment, the mounting portion 211 is a rectangular sheet structure, increasing the injection molding contact area with the upper cover 32, thereby increasing the connection strength.

[0039] Further, as a preferred embodiment, the mounting portion 211 has a plurality of holes 213, further increasing the injection molding contact area with the upper cover 32.

[0040] Further, as a preferred embodiment, the two mounting portions 211 in each elastic piece 2 are connected with a plurality of elastic pressing portions 212 on the side close to each other.

[0041] Further, as a preferred embodiment, each mounting portion 211 is connected with two elastic pressing portions 212.

[0042] Further, as a preferred embodiment, the two elastic pressing portions 212 are respectively located on the two sides of the mounting portion 211.

[0043] Further, as a preferred embodiment, the plurality of elastic pressing portions 212 and the mounting portion 211 are an integrated structure.

[0044] Further, as a preferred embodiment, the upper cover 32 has a plurality of avoiding openings 321, and the plurality of avoiding openings 321 are distributed one-to-one corresponding to the plurality of elastic pressing portions 212.

[0045] A battery pack comprising the fixing structure of any of the above cooling BDU inverted relays.

[0046] The above only describes the preferred embodiments of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. A fixing structure of a cooling BDU inverting relay, characterized by, The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay.

2. The fixing structure of the cooling BDU inverting relay according to claim 1, characterized in that, The application relates to a fixing structure of a cooling BDU inverted relay.

3. The fixing structure of the cooling BDU inverting relay according to claim 2, characterized by, The application relates to a fixing structure of a cooling BDU inverted relay.

4. The fixing structure of the cooling BDU inverting relay according to claim 3, wherein The application relates to a fixing structure of a cooling BDU inverted relay.

5. The fixing structure of the cooling BDU inverting relay according to claim 4, wherein The application relates to a fixing structure of a cooling BDU inverted relay.

6. The fixing structure of the cooling BDU inverting relay according to claim 1, wherein The application relates to a fixing structure of a cooling BDU inverted relay.

7. The fixing structure of the cooling BDU inverting relay according to claim 6, wherein The application relates to a fixing structure of a cooling BDU inverted relay.

8. The fixing structure of the cooling BDU inverting relay according to claim 7, wherein The application relates to a fixing structure of a cooling BDU inverted relay.

9. The structure for fixing the cooling BDU inverter relay according to claim 1, wherein The application relates to a fixing structure of a cooling BDU inverted relay.

10. A battery pack, characterized by, The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure of a cooling BDU inverted relay. The application relates to a fixing structure

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