Side-cooled BDU and battery pack

Abstract

The utility model relates to a side-cooled BDU and a battery pack, the side-cooled BDU comprises an upper shell, a lower shell and a liquid cooling plate, the liquid cooling plate is located on one side of the upper shell, and the bottom of the liquid cooling plate is connected with the lower shell. According to the utility model, the liquid cooling plate is arranged on the side surface of the BDU shell, so that the height size of a BDU system can be effectively reduced; the lower shell and the liquid cooling plate are connected through the plate spring nut installed later, the complexity of a BDU lower shell mold is simplified, meanwhile, the deformation characteristic of the plate spring nut can absorb the tolerance between the liquid cooling plate and a fixing face, and the planeness requirement of a part installation face is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a side-cooled BDU and a battery pack. Background Art

[0002] With the continuous development of the electric vehicle industry, in order to cope with people's mileage anxiety and demand for strong power, the charging and discharging power of the whole vehicle has become larger and larger, which puts higher requirements on the thermal management of the power battery system. As a key component of the battery system, the thermal management performance of the BDU plays an important role in the working efficiency and reliability of the power battery system, so it is necessary to configure the BDU with a liquid cooling module. Most of the BDU liquid cooling modules on the market are arranged at the bottom or top of the BDU. For example, the patent with publication number CN220553578U discloses a BDU unit, including a shell, an electrical unit and a bus. The lower shell of the shell is connected to the liquid cooling plate, which causes the height dimension of the entire BDU system to be large, which is not suitable for battery systems with limited height dimensions. Utility Model Content

[0003] Based on this, it is necessary to address the technical problem that the current BDU liquid cooling module is arranged at the bottom or top of the BDU, which causes the height dimension of the entire BDU system to be large and is not suitable for battery systems with limited height dimensions. The utility model proposes a side-cooled BDU and battery pack.

[0004] The utility model provides a side-cooling BDU, which comprises an upper shell, a lower shell and a liquid cooling plate. The liquid cooling plate is located at one side of the upper shell and the bottom of the liquid cooling plate is connected to the lower shell.

[0005] The utility model arranges the liquid cooling plate on the side of the BDU shell, which can effectively reduce the height size of the BDU system.

[0006] As a further improvement of the above solution of the utility model, an opening adapted to the liquid cooling plate is opened on one side of the upper shell, and the liquid cooling plate is arranged at the opening and its two side edges and top edge are in contact with the opening end of the upper shell.

[0007] As a further improvement of the above solution of the utility model, a plurality of leaf spring nuts are fixed on the lower shell, and the liquid cooling plate is connected to the plurality of leaf spring nuts respectively through a plurality of connecting bolts.

[0008] As a further improvement of the above solution of the utility model, the bottom of the upper shell is buckled and connected to the lower shell, and the upper shell and the lower shell cooperate to form a accommodating cavity.

[0009] As a further improvement of the above solution of the utility model, the side-cooled BDU also includes electrical components and a busbar. The electrical components are arranged in the accommodating cavity and installed on the lower shell. The busbar is electrically connected to the electrical components.

[0010] As a further improvement of the above solution of the utility model, the electrical component is connected to the lower shell by bolts or buckles.

[0011] As a further improvement of the above solution of the utility model, a thermal pad which is in contact with the bus is provided on the inner side of the liquid cooling plate.

[0012] The utility model provides a battery pack, which includes the side-cooled BDU as mentioned above.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model arranges the liquid cooling plate on the side of the BDU shell, which can effectively reduce the height size of the BDU system.

[0015] The utility model utilizes the post-installed leaf spring nut to realize the connection between the lower shell and the liquid cooling plate, thus simplifying the complexity of the BDU lower shell mold. Meanwhile, the deformation characteristics of the leaf spring nut can absorb the tolerance between the liquid cooling plate and the fixed surface, thus reducing the flatness requirement of the part installation surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a side-cooled BDU proposed in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Exploded diagram of

[0018] Figure 3 A schematic diagram of a partial structure of a side-cooled BDU proposed in an embodiment of the utility model;

[0019] Figure 4 A front view of a lower shell of a side-cooled BDU proposed in an embodiment of the utility model.

[0020] Figure numerals: 1. upper shell; 2. lower shell; 3. liquid cooling plate; 4. leaf spring nut; 5. connecting bolt; 6. electrical parts; 7. busbar; 8. thermal pad. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] In view of the technical problem that the current BDU liquid cooling module is arranged at the bottom or top of the BDU, which causes the height dimension of the entire BDU system to be large and is not suitable for a battery system with limited height dimensions, this embodiment provides a side-cooled BDU, in which the liquid cooling plate is arranged on the side of the BDU shell, which can effectively reduce the height dimension of the BDU system.

[0023] Reference Figure 1-Figure 3 The side liquid-cooled BDU of this embodiment is used for a battery pack and includes an upper shell 1, a lower shell 2 and a liquid cooling plate 3, and may also include electrical components 6 and a bus 7.

[0024] An opening is provided on one side of the upper shell 1. In this embodiment, the upper shell 1 is integrally formed by injection molding.

[0025] The lower shell 2 is located below the upper shell 1. In this embodiment, the lower shell 2 is also integrally injection molded and has an insulating function to prevent leakage. The bottom of the upper shell 1 is snap-fitted to the lower shell 2. Specifically, snaps are provided on both sides of the bottom of the upper shell 1, and protrusions that match the snaps are provided on both sides of the lower shell 2. The snaps are snapped to the protrusions, so as to facilitate installation and disassembly between the upper shell 1 and the lower shell 2, and facilitate maintenance. The upper shell 1 and the lower shell 2 cooperate to form a accommodating cavity. Combined Figure 4 Three leaf spring nuts 4 are fixed on the lower shell 2 at positions corresponding to the openings of the upper shell 1 . The leaf spring nuts 4 are installed on the lower shell 2 after the lower shell 2 is injection molded.

[0026] The electrical component 6 and the busbar 7 are both arranged in the accommodating cavity, the electrical component 6 is fixed to the lower shell 2 by bolts or buckles, and the busbar 7 is connected to the electrical component 6 by bolts, thereby realizing the electrical connection between the busbar 7 and the electrical component 6. In this embodiment, the electrical component 6 mainly includes an existing small contactor, a main contactor, a resistor, a fuse, and a current sensor. The main contactor can be installed sideways on the lower shell 2. The sideways installation of the main contactor can reduce the height size of the BDU.

[0027] The liquid cooling plate 3 is arranged at the opening position of the upper shell 1, and the edges on both sides and the top of the liquid cooling plate 3 are in contact with the opening end of the upper shell 1. Three connecting bolts 5 are connected to the liquid cooling plate 3, and the three connecting bolts 5 are respectively connected to the three leaf spring nuts 4 one by one, so as to facilitate the installation and disassembly of the liquid cooling plate 3 and facilitate maintenance. The connection between the lower shell 2 and the liquid cooling plate 3 is realized by using the leaf spring nuts 4 installed later, which simplifies the complexity of the BDU lower shell 2 mold. At the same time, the deformation characteristics of the leaf spring nuts 4 can absorb the tolerance between the liquid cooling plate 3 and the fixed surface, and reduce the flatness requirements of the part installation surface. In this embodiment, the liquid cooling plate 3 adopts the liquid cooling plate 3 in the prior art, which will not be described in detail here. The liquid cooling plate 3 contains flowing coolant to realize the cooling function.

[0028] The inner side of the liquid cooling plate 3 is closely fitted with a thermal pad 8, and the thermal pad 8 is closely fitted with the bus 7. In this embodiment, the thermal pad 8 is made of a material with a relatively high thermal coefficient, and the thermal conductivity of the thermal pad 8 is higher than that of the bus 7. The heat generated by the electrical component 6 is transferred from the bus 7 to the liquid cooling plate 3 through the thermal pad 8, thereby realizing the cooling function of the electrical component 6.

[0029] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0031] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A side-cooled BDU, comprising an upper shell (1), a lower shell (2) and a liquid cooling plate (3), characterized in that: The liquid cooling plate (3) is located on one side of the upper shell (1) and its bottom is connected to the lower shell (2); an opening matching the liquid cooling plate (3) is provided on one side of the upper shell (1); the liquid cooling plate (3) is arranged at the opening and its two side edges and top edge are in contact with the opening end of the upper shell (1).

2. The side-cooled BDU according to claim 1, characterized in that A plurality of leaf spring nuts (4) are fixed on the lower shell (2), and the liquid cooling plate (3) is connected to the plurality of leaf spring nuts (4) via a plurality of connecting bolts (5).

3. The side-cooled BDU according to claim 1, characterized in that The bottom of the upper shell (1) is buckled and connected to the lower shell (2), and the upper shell (1) and the lower shell (2) cooperate to form a receiving cavity.

4. The side-cooled BDU according to claim 3, characterized in that The side-cooled BDU further comprises an electrical component (6) and a busbar (7); the electrical component (6) is arranged in the accommodating cavity and mounted on the lower shell (2); and the busbar (7) is electrically connected to the electrical component (6).

5. The side-cooled BDU according to claim 4, characterized in that The electrical component (6) is connected to the lower shell (2) via bolts or buckles.

6. The side-cooled BDU according to claim 5, characterized in that The inner side surface of the liquid cooling plate (3) is provided with a heat conducting pad (8) which is in contact with the bus bar (7).

7. A battery pack, characterized in that: It comprises a side-cooled BDU as claimed in any one of claims 1-6.

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