Liquid-cooled built-in BDU for battery pack

Abstract

The utility model relates to the technical field of battery pack components, in particular to a liquid-cooled built-in BDU for a battery pack, which comprises a shell, the top of the shell is open, and a plurality of heating components are arranged in the shell; the liquid cooling device also comprises a liquid cooling pipe and a top cover, and the plurality of heating components are arranged along a snake-shaped path; the liquid cooling pipes are arranged at the tops of the heating components, and the liquid cooling pipes are bent in a snake shape along the arrangement path of the heating components; the top cover is buckled to the top of the shell, the top of the inner side of the top cover is detachably connected with the liquid cooling pipe, and the two ends of the liquid cooling pipe penetrate through the side wall of the top cover; according to the liquid cooling built-in BDU for the battery pack provided by the utility model, the liquid cooling pipe is arranged in the top cover, so that the liquid cooling pipe can be conveniently sealed in the BDU, and during heat dissipation, low temperature generated by a cooling medium can act on the interior of the BDU instead of acting on the exterior of the BDU, so that the utilization rate of the low temperature is relatively high, and the heat dissipation efficiency of a heating point in the BDU can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack components, in particular to a liquid-cooled built-in BDU for a battery pack. Background Art

[0002] BDU refers to the battery disconnection unit of the battery pack, which is one of the core components of the battery management system. Each unit battery in the battery pack needs to be detected and managed. When a certain single battery has a problem, the disconnection unit will play a key protective role.

[0003] At present, there are generally two schemes for the battery disconnection unit: natural cooling and liquid cooling. For example, a split injection-molded liquid-cooled BDU disclosed in CN117355109A reveals two schemes of natural cooling and liquid-cooled cooling of the BDU in its technical solution.

[0004] In the prior art as described above, the liquid-cooling pipe is embedded in the bottom plate of the housing assembly, which is an external liquid-cooled heat dissipation structure. During heat dissipation, a part of the low temperature generated by the cooling medium acts on the heat generation points inside the BDU (such as the main positive relay, the main negative relay, etc.), and the other part will be lost to the outside of the BDU, resulting in a low utilization rate of the cold temperature and a low heat dissipation efficiency of the heat generation points inside the BDU. To solve the above problems, it is necessary to provide a liquid-cooled built-in BDU for a battery pack. Summary of the Utility Model

[0005] In view of this, the utility model provides a liquid-cooled built-in BDU for a battery pack. By arranging the liquid-cooling pipe in the top cover, it is convenient to enclose the liquid-cooling pipe inside the BDU. During heat dissipation, the low temperature generated by the cooling medium will act inside the BDU and will not act outside the BDU, resulting in a high utilization rate of the cold temperature and effectively improving the heat dissipation efficiency of the heat generation points inside the BDU.

[0006] The technical solution of the utility model is realized as follows:

[0007] The utility model provides a liquid-cooled built-in BDU for a battery pack, including a housing. The top of the housing is open, and a plurality of heat-generating components are arranged inside the housing;

[0008] It further includes a liquid-cooling pipe and a top cover. Among them,

[0009] The plurality of heat-generating components are arranged along a serpentine path;

[0010] The liquid-cooling pipe is arranged on the top of the heat-generating components, and the liquid-cooling pipe is bent in a serpentine shape along the arrangement path of the heat-generating components;

[0011] The top cover is buckled on the top of the housing. The top of the inner side of the top cover is detachably connected to the liquid cooling pipe, and both ends of the liquid cooling pipe penetrate through the side wall of the top cover.

[0012] Based on the above technical solutions, preferably, it further includes pipeline connectors, where,

[0013] One pipeline connector is fixed at each end of the liquid cooling pipe.

[0014] Based on the above technical solutions, preferably, it further includes a heat conducting plate, where,

[0015] The heat conducting plate is clamped between the heat generating component and the liquid cooling pipe.

[0016] Based on the above technical solutions, preferably, the cross-section of the liquid cooling pipe is circular tubular or square tubular.

[0017] Based on the above technical solutions, preferably, at the position corresponding to the liquid cooling pipe on the top of the inner side of the top cover, a groove is provided, and the liquid cooling pipe is arranged in the groove.

[0018] Based on the above technical solutions, preferably, the groove protrudes upward from the top surface of the top cover.

[0019] Based on the above technical solutions, preferably, the top cover and the liquid cooling pipe are fixed by tying with a cable tie.

[0020] Based on the above technical solutions, preferably, cable tie mounting holes are provided on the top cover.

[0021] Based on the above technical solutions, preferably, the top cover and the liquid cooling pipe are snap-fitted.

[0022] Based on the above technical solutions, preferably, a snap portion is provided on the inner side of the groove, and the liquid cooling pipe is clamped and fixed on the inner side of the snap portion.

[0023] A liquid-cooled built-in BDU for a battery pack of the present utility model has the following beneficial effects compared with the prior art:

[0024] (1) By arranging the liquid cooling pipe in the top cover, it is convenient to enclose the liquid cooling pipe inside the BDU. During heat dissipation, the low temperature generated by the cooling medium will act inside the BDU instead of outside the BDU, so that the utilization rate of the cold temperature is relatively high, and the heat dissipation efficiency of the heat generating points inside the BDU can be effectively improved.

[0025] (2) By arranging several heating components in the housing along a serpentine path and bending the liquid cooling pipe in a serpentine shape along the arrangement path of the heating components, the layout between components is reasonable, the structure is compact, and the lateral width is small, which can effectively reduce the occupation of the internal space of the battery pack by the BDU. At the same time, through this structural layout, the liquid cooling pipe can accurately dissipate heat from the fuse, main positive relay, main negative relay, and shunt, facilitating the rapid cooling of each heating component.

[0026] (3) By setting the liquid cooling pipe and the top cover to be fixed by cable ties or connected by snap-fit parts, the installation of the liquid cooling pipe is convenient. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a top view of a liquid-cooled built-in BDU for a battery pack of the present invention;

[0029] Figure 2 It is a partial explosion view of a liquid-cooled built-in BDU for a battery pack of the present invention;

[0030] Figure 3 It is a perspective view of the top cover of the present invention;

[0031] Figure 4 It is a top view of the housing of the present invention;

[0032] Figure 5 It is a first installation structure schematic diagram of the liquid cooling pipe of the present invention;

[0033] Figure 6 It is a second installation structure schematic diagram of the liquid cooling pipe of the present invention;

[0034] In the figure: 1, housing; 2, heating component; 3, liquid cooling pipe; 4, top cover; 5, pipe joint; 6, heat conduction plate; 11, protrusion; 21, fuse; 22, main positive relay; 23, main negative relay; 24, shunt; 41, buckle; 401, groove; 402, cable tie installation hole; 403, snap-fit part. Detailed Embodiment

[0035] The technical solutions in the present utility model will be clearly and completely described below in conjunction with the specific embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0036] As Figures 1-6 shown, a liquid-cooled built-in BDU for a battery pack of the present utility model includes a housing 1, heating components 2, liquid-cooling tubes 3, a top cover 4, pipeline connectors 5, and a heat conduction plate 6.

[0037] Among them, the housing 1 is a box-shaped structure with an open top, and a plurality of heating components 2 are fixedly arranged inside the housing 1 by bolts.

[0038] As Figure 2 and Figure 4 shown, a plurality of heating components 2 are arranged along a serpentine path. Specifically, as Figure 4 shown, from left to right, one of the heating components 2 is a fuse 21, the second heating component 2 is a main positive relay 22, another heating component 2 is a main negative relay 23, and the last heating component 2 is a shunt 24. As Figure 2 shown, the heat conduction plate 6 covers the fuse 21, the main positive relay 22, the main negative relay 23, and the shunt 24 for heat transfer.

[0039] The liquid-cooling tubes 3 are arranged on the top of the heating components 2 and are detachably arranged on the inner top of the housing 1. When the top cover 4 and the housing 1 are buckled, the heat conduction plate 6 is clamped between the heating components 2 and the liquid-cooling tubes 3. The heat generated by the heating components 2 is transferred to the heat conduction plate 6, then to the liquid-cooling tubes 3, and then the heating components 2 are cooled by the liquid-cooling tubes 3. Among them, the heat conduction plate 6 is a rectangular heat-conducting silica gel plate.

[0040] As Figure 3 shown, the liquid-cooling tubes 3 are bent in a serpentine shape along the arrangement path of the heating components 2, that is, the liquid-cooling tubes 3 pass above the fuse 21, the main positive relay 22, the main negative relay 23, and the shunt 24 from left to right in sequence. Through this structural layout, the liquid-cooling tubes 3 can accurately dissipate heat from the fuse 21, the main positive relay 22, the main negative relay 23, and the shunt 24, facilitating the rapid cooling of each heating component 2.

[0041] To facilitate the conveyance of the cooling medium, both ends of the liquid cooling pipe 3 penetrate through the side wall of the top cover 4, and both ends of the liquid cooling pipe 3 are aligned with the outer side wall of the top cover 4 at the corresponding positions. A pipeline joint 5 is screwed and fixed at each end of the liquid cooling pipe 3, and the circulating pipeline of the cooling medium is connected through the pipeline joint 5. The illustration of the circulating pipeline of the cooling medium is not shown, and the circulating pipeline of the cooling medium can adopt a cooling medium circulating pipeline disclosed in CN210374729U.

[0042] The top cover 4 is buckled on the top of the housing 1 by a snap structure. As Figure 2 shown, a snap ring 41 is provided on the side of the top cover 4, and a protrusion 11 is provided on the side of the housing 1. After the top cover 4 and the housing 1 are closed, the protrusion 11 is inserted into the snap ring 41 to achieve locking. When it is necessary to open the top cover 4, the snap ring 41 is pried outwards so that the protrusion 11 is removed from the snap ring 41 to achieve unlocking. After unlocking, the top cover 4 is removed.

[0043] In the structure of the liquid cooling built-in BDU for this battery pack, as Figure 5 and Figure 6 shown, the cross-section of the liquid cooling pipe 3 is circular tubular, square tubular, or can also be elliptical tubular.

[0044] In addition, to improve the convenience of installation and the stability after installation of the liquid cooling pipe 3, as Figure 3 shown, a groove 401 is provided at the top inside the top cover 4 and at the position corresponding to the liquid cooling pipe 3. The liquid cooling pipe 3 is arranged in the groove 401. Among them, as Figure 1 shown, the groove 401 protrudes upwards from the top surface of the top cover 4. The positioning and installation of the liquid cooling pipe 3 are facilitated through the groove 401. At the same time, the position of the liquid cooling pipe 3 can be restricted, and the stability is relatively good when the liquid cooling pipe 3 is fixed.

[0045] In the above structure, the liquid cooling pipe 3 includes two fixing methods, which are specifically as follows:

[0046] The first fixing method is that the top cover 4 and the liquid cooling pipe 3 are fixed by bundling with a cable tie. Specifically, as Figure 3 and Figure 5 shown, cable tie mounting holes 402 are provided on the top cover 4, and the cable tie mounting holes 402 are used to mount the cable tie. After the liquid cooling pipe 3 is placed in the groove 401, the cable tie is passed through the cable tie mounting holes 402, and then the liquid cooling pipe 3 is fixed in the groove 401 through the cable tie, completing the installation and fixing of the liquid cooling pipe 3.

[0047] The second fixing method is that the top cover 4 and the liquid cooling pipe 3 are snap-connected. Specifically, as Figure 6As shown, a buckle portion 403 is provided on the inner side of the groove 401. The buckle portion 403 shown in the figure is U-shaped, and it can also be other geometric shapes. The opening diameter of the U-shaped structure of the buckle portion 403 is smaller than the outer diameter of the liquid cooling pipe 3, but the inner diameter of its U-shaped structure is equal to or greater than the outer diameter of the liquid cooling pipe 3. When installing the liquid cooling pipe 3, the liquid cooling pipe 3 is placed into the groove 401, and the liquid cooling pipe 3 is snapped into the inner side of the buckle portion 403 to complete the installation and fixation of the liquid cooling pipe 3.

[0048] The above two installation methods can be used alone or in combination.

[0049] A usage method of a liquid-cooled built-in BDU for a battery pack of the present utility model is as follows:

[0050] First, the heat-generating component 2 is installed inside the housing 1, then a heat conduction plate 6 is laid on the top of the heat-generating component 2, and then the liquid cooling pipe 3 is fixed to the groove 401. Then, a pipeline joint 5 is screwed at each end of the liquid cooling pipe 3. One pipeline joint 5 is a cold medium inlet, and the other is a cold medium outlet. Then, the top cover 4 is buckled on the top of the housing 1 to complete the assembly of the BDU.

[0051] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A liquid-cooled built-in BDU for a battery pack, comprising a housing (1), wherein, The top of the housing (1) is open, and several heating components (2) are arranged inside the housing (1); It is characterized in that: it further includes a liquid cooling pipe (3) and a top cover (4), wherein, Several of the heating components (2) are arranged along a serpentine path; The liquid cooling pipe (3) is arranged on the top of the heating components (2), and the liquid cooling pipe (3) is bent in a serpentine shape along the arrangement path of the heating components (2); The top cover (4) is buckled on the top of the housing (1), the top of the inner side of the top cover (4) is detachably connected to the liquid cooling pipe (3), and both ends of the liquid cooling pipe (3) penetrate through the side wall of the top cover (4).

2. The liquid-cooled built-in BDU for a battery pack according to claim 1, wherein: It further includes a pipeline joint (5), wherein, One pipeline joint (5) is fixed at each end of the liquid cooling pipe (3).

3. The liquid-cooled built-in BDU for a battery pack according to claim 1, wherein: It further includes a heat conducting plate (6), wherein, The heat conducting plate (6) is clamped between the heating components (2) and the liquid cooling pipe (3).

4. The liquid-cooled built-in BDU for a battery pack according to claim 1, characterized in that: The cross-section of the liquid cooling pipe (3) is circular tubular or square tubular.

5. A liquid-cooled built-in BDU for a battery pack, characterized in that: A groove (401) is provided at the position corresponding to the liquid cooling pipe (3) on the top of the inner side of the top cover (4), and the liquid cooling pipe (3) is arranged in the groove (401).

6. The liquid-cooled built-in BDU for a battery pack according to claim 5, characterized in that: The groove (401) protrudes upward from the top surface of the top cover (4).

7. The liquid-cooled built-in BDU for a battery pack according to claim 6, wherein: The top cover (4) and the liquid cooling pipe (3) are fixed by tying with a cable tie.

8. The liquid-cooled built-in BDU for a battery pack according to claim 7, wherein: Cable tie mounting holes (402) are provided on the top cover (4).

9. A liquid-cooled built-in BDU for a battery pack according to claim 6, characterized in that: The top cover (4) and the liquid cooling pipe (3) are snap-fitted.

10. A liquid-cooled built-in BDU for a battery pack, characterized in that: A snap portion (403) is provided on the inner side of the groove (401), and the liquid cooling pipe (3) is clamped and fixed inside the snap portion (403).

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