Battery pack box body with liquid cooling function

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack box body with a liquid cooling function, which comprises a front beam plate and a rear beam plate which are symmetrically arranged, side beam plates are symmetrically arranged between the front beam plate and the rear beam plate, a bottom plate is arranged at the bottoms of the front beam plate, the rear beam plate and the two side beam plates, a lower-layer liquid cooling plate is arranged on the bottom plate, and a lower-layer liquid cooling plate is arranged on the lower-layer liquid cooling plate. A supporting beam is arranged on the inner wall of the side beam plate, an upper-layer liquid cooling plate is arranged on the supporting beam, a cooling liquid pipeline through groove is formed in the front end of the upper-layer liquid cooling plate, and a cooling liquid pipeline assembly and a vertical front baffle are arranged in the cooling liquid pipeline through groove; a high-voltage box module mounting cavity is formed between the front baffle and the front beam plate, a battery cell module mounting cavity is formed between the front baffle and the rear beam plate, and the cooling liquid pipeline assembly is used for synchronously providing liquid cooling circulation for the upper-layer liquid cooling plate and the lower-layer liquid cooling plate. The box body can realize effective isolation of the high-voltage box module and the longitudinally stacked battery cell modules, so that the high-voltage box module and the longitudinally stacked battery cell modules work independently and do not influence each other, and the heat dissipation effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field especially, relate to a battery pack box with liquid cooling function. BACKGROUND

[0002] At present, new energy vehicles are widely concerned by the society due to its excellent environmental performance, and the requirements for new energy vehicles are also increasing, as a kind of new energy vehicles, electric vehicles are also developing towards high safety, high energy ratio and light weight. The main factor determining the driving range of electric vehicles is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet the driving requirements.

[0003] The power supply battery for electric vehicles is generally a battery pack composed of multiple battery modules, that is, multiple battery modules are stacked up and down in the same box, and then the battery modules are connected and connected to the outside through a high-voltage box. Due to the close stacking of each battery module and the high-voltage box module in the same box, they will affect each other during operation.

[0004] The box for packaging the battery module in the traditional technology not only has a complex structure, but also has a small ventilation space due to the complete adhesion of the inner wall of the box to the four sides of the battery module. The battery module releases a large amount of heat during operation, which may affect the service life of the battery module, or even cause a safety accident due to high temperature. The existing heat dissipation method occupies a large space inside the battery pack box, and requires high assembly, which greatly reduces the assembly efficiency of the battery pack.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the problems of the prior art, and provides a battery pack box with liquid cooling function, which solves the technical problems of the complex structure of the battery pack box in the prior art, the direct sharing of a space by the high-voltage box module and the battery module, the mutual influence during operation, the inability to firmly fix the two battery modules arranged vertically, and the inability to effectively cool the high temperature generated in the box.

[0007] The above-mentioned purpose is achieved by the following technical solutions:

[0008] The utility model provides a battery pack box body with liquid cooling function, including symmetrically arranged front beam plate and rear beam plate, symmetrically arranged side beam plate between front beam plate and rear beam plate, and bottom plate is provided at the bottom of front beam plate, rear beam plate and two side beam plate, bottom plate is provided with the lower liquid cooling plate embedding groove of the lower liquid cooling plate embedding, the inner wall of two side beam plate is symmetrically provided with support beam, 2 support beam is provided with upper liquid cooling plate, the rear end of upper liquid cooling plate is in contact with the inner wall of rear beam plate, and the front end is provided with cooling liquid pipeline through slot, and cooling liquid pipeline assembly and vertical front baffle are arranged in cooling liquid pipeline through slot, the bottom end of front baffle is vertically connected with bottom plate, the front baffle and the front beam plate form high pressure box module installation cavity, the front baffle and the rear beam plate form electric core module installation cavity, and the electric core module installation cavity is divided into upper electric core module installation cavity and lower electric core module installation cavity by upper liquid cooling plate, and cooling liquid pipeline assembly is used for providing liquid cooling circulation for upper liquid cooling plate and lower liquid cooling plate synchronously.

[0009] Further, the cooling liquid pipeline assembly includes upper liquid inlet and upper liquid outlet provided on the corresponding upper liquid cooling plate on both sides of the cooling liquid pipeline through slot; the lower liquid inlet and the lower liquid outlet are symmetrically provided on the corresponding lower liquid cooling plate of the cooling liquid pipeline through slot; a vertically downward lower liquid inlet pipe is provided on the lower liquid inlet; a horizontally downward upper liquid inlet pipe is provided on the upper liquid inlet; the upper liquid inlet pipe and the lower liquid inlet pipe are connected through a three-way liquid inlet joint; and a liquid inlet main pipe is connected to the top interface of the three-way liquid inlet joint.

[0010] Further, the liquid inlet joint and the liquid outlet joint are respectively connected to the liquid inlet main pipe and the liquid outlet main pipe; the liquid inlet joint and the liquid outlet joint are embedded in the front beam plate.

[0011] Further, the upper part of the front baffle is fixedly connected to the inner wall of the two side beam plates through front baffle support blocks.

[0012] Further, the side edges of the front baffle are provided with a first bracket corresponding to the upper electric core module installation cavity and a second bracket corresponding to the lower electric core module installation cavity; and electric connection terminals are respectively provided on the first bracket and the second bracket.

[0013] Further, the upper liquid cooling plate comprises an upper liquid cooling plate body corresponding to the width of the lower liquid cooling plate, and upper liquid cooling plate support edges symmetrically arranged on both sides of the upper liquid cooling plate body, and the two upper liquid cooling plate support edges are respectively supported by the support beams.

[0014] Further, the support beams and the upper liquid cooling plate support edges are both provided with corresponding liquid cooling plate connecting holes, and are screwed by liquid cooling plate screws.

[0015] Further, the front beam plate is further provided with a plurality of sockets, and the inner side of the socket is in communication with the high-voltage box module mounting cavity.

[0016] Further, it further comprises a box cover.

[0017] The battery pack box body with liquid cooling function provided by the utility model separates the box body into independent high-voltage box module mounting cavities and battery cell module mounting cavities through front baffles, and separates the battery cell module mounting cavities into upper and lower battery cell module mounting cavities through middle partition plates, thereby providing independent mounting spaces for high-voltage box modules and two battery cell modules that need to be vertically stacked, which not only can realize orderly installation, but also do not interfere with each other during work. The double-layer liquid cooling plate structure realizes synchronous cooling and heat dissipation of the two battery cell modules, the liquid cooling pipe passage is arranged at one end of the upper liquid cooling plate to greatly facilitate the installation of the pipe, and at the same time, does not occupy other spaces in the battery pack box body, so that the arrangement in the box body is more simple. The battery pack box body with liquid cooling function not only has compact internal structure, can realize effective isolation of high-voltage box modules and vertically stacked battery cell modules, and makes them work independently without affecting each other, but also has good heat dissipation effect, does not occupy space, and can greatly improve the assembly efficiency of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the battery pack box body with liquid cooling function.

[0019] Figure 2 It is an internal schematic view of the battery pack box body with liquid cooling function.

[0020] Figure 3 It is a liquid cooling plate connection schematic view of the battery pack box body with liquid cooling function.

[0021] Figure 4 It is a sectional view of the battery pack box body with liquid cooling function.

[0022] Figure 5 It is a schematic view of the cooling liquid pipe assembly and the liquid cooling plate connection of the battery pack box body with liquid cooling function.

[0023] Illustration mark:

[0024] 1 - upper liquid cooling plate, 101 - cooling liquid pipeline through slot, 102 - upper layer liquid inlet, 103 - upper layer liquid outlet, 104 - upper layer liquid cooling plate body, 105 - upper layer liquid cooling plate support edge;

[0025] 2 - lower liquid cooling plate, 201 - lower layer liquid inlet, 202 - lower layer liquid outlet;

[0026] 3 - cooling liquid pipeline assembly, 301 - lower layer liquid inlet pipe, 302 - lower layer liquid outlet pipe, 303 - upper layer liquid inlet pipe, 304 - upper layer liquid outlet pipe, 305 - three-way liquid inlet connector, 306 - three-way liquid outlet connector, 307 - liquid inlet main pipe, 308 - liquid outlet main pipe;

[0027] 4 - high pressure box module installation cavity;

[0028] 5 - electric core module installation cavity, 501 - upper layer electric core module installation cavity, 502 - lower layer electric core module installation cavity;

[0029] 6 - front beam plate, 7 - rear beam plate, 8 - side beam plate, 9 - bottom plate, 10 - lower layer liquid cooling plate embedding groove, 11 - support beam, 12 - front baffle, 13 - liquid inlet connector, 14 - liquid outlet connector, 15 - front baffle support block, 16 - first support, 17 - second support, 18 - electric connection terminal, 19 - liquid cooling plate connecting hole, 20 - liquid cooling plate screw, 21 - socket, 22 - box cover. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail below according to the drawings and examples. The described example is only a part of the utility model example, and is not all examples. Based on the example in the utility model, all other examples obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0031] As Figures 1-4As shown, this solution provides a battery pack housing with liquid cooling function, including a symmetrically arranged front beam plate 6 and rear beam plate 7. Side beam plates 8 are symmetrically arranged between the front beam plate 6 and the rear beam plate 7. A bottom plate 9 is provided at the bottom of the front beam plate 6, the rear beam plate 7, and the two side beam plates 8. The bottom plate 9 is provided with a lower liquid cooling plate groove 10 for embedding a lower liquid cooling plate 2. Support beams 11 are symmetrically arranged on the inner walls of the two side beam plates 8. An upper liquid cooling plate 1 is provided on the two support beams 11. The rear end of the upper liquid cooling plate 1 contacts the inner wall of the rear beam plate 7. A coolant pipe passage groove 101 is opened at the front end of the upper liquid cooling plate 1. A coolant pipe assembly 3 and a vertical front baffle 12 are provided in the coolant pipe passage groove 101. The bottom end of the front baffle 12 is vertically connected to the bottom plate 9.

[0032] The front baffle 12 and the front beam 6 form a high-voltage box module mounting cavity 4, and the front baffle 6 and the rear beam 7 form a cell module mounting cavity 5. The cell module mounting cavity 5 is divided into an upper cell module mounting cavity 501 and a lower cell module mounting cavity 502 by the upper liquid cooling plate 1.

[0033] The coolant piping assembly 3 is used to provide synchronous liquid cooling circulation to the upper liquid cooling plate 1 and the lower liquid cooling plate 2, so as to achieve heat dissipation and cooling of the battery cell module placed on the upper liquid cooling plate 1 and the lower liquid cooling plate 2.

[0034] The enclosure also includes a cover 22, which can seal the high-voltage box module mounting cavity 4 and the cell module mounting cavity 5.

[0035] like Figure 5 As shown, in this embodiment, the coolant piping assembly 3 includes an upper inlet 102 and an upper outlet 103 disposed on the upper liquid cooling plate 1 corresponding to both sides of the coolant piping channel 101; a lower inlet 201 and a lower outlet 202 are symmetrically disposed on the lower liquid cooling plate 2 corresponding to the coolant piping channel 101; a vertical lower inlet pipe 301 is disposed on the lower inlet 201, and a horizontal upper inlet pipe 303 is disposed on the upper inlet 102. The liquid pipe 303 is connected to the lower liquid inlet pipe 301 via a three-way liquid inlet connector 305, and a main liquid inlet pipe 307 is connected to the top interface of the three-way liquid inlet connector 305; a vertical lower liquid outlet pipe 302 is provided on the lower liquid outlet 202, and a horizontal upper liquid outlet pipe 304 is provided on the upper liquid outlet 103. The upper liquid outlet pipe 304 is connected to the lower liquid outlet pipe 302 via a three-way liquid outlet connector 306, and a main liquid outlet pipe 308 is connected to the top interface of the three-way liquid outlet connector 306.

[0036] It should be noted that the lower layer liquid inlet pipe 301 and the lower layer liquid outlet pipe 302 in the embodiment are limited in the longitudinal space where the cooling liquid pipe passage slot 101 is located, thereby realizing that the cooling liquid pipe assembly 3 is as close as possible to the liquid cooling plate, that is, the purpose of liquid cooling circulation is realized, and the pipe can be effectively stored, so that it does not occupy too much space in the battery pack box, and it is convenient for the operator to assemble.

[0037] In addition, in order to facilitate the connection of the cooling liquid pipe assembly 3 and the external liquid cooling circulation device, the liquid inlet connector 13 and the liquid outlet connector 14 are respectively connected to the liquid inlet main pipe 307 and the liquid outlet main pipe 308, and the liquid inlet connector 13 and the liquid outlet connector 14 are embedded on the front beam plate 6 to connect with the external cooling liquid circulation device, so as to realize the synchronous provision of liquid cooling circulation to the upper layer liquid cooling plate 1 and the lower layer liquid cooling plate 2 through the cooling liquid pipe assembly 3.

[0038] As shown in Figure 1 and Figure 2 , the upper part of the front baffle 12 and the inner walls of the two side beam plates 8 are respectively fixed by the front baffle support block 15, thereby providing stable support for the top of the front baffle 12, and firmly vertically arranging it in the box.

[0039] In addition, the side of the front baffle 12 is also provided with a first support 16 corresponding to the upper layer battery cell module mounting cavity 501, and a second support 17 corresponding to the lower layer battery cell module mounting cavity 502, and an electric connection terminal 18 is arranged on each of the first support 16 and the second support 17, and the two electric connection terminals 18 are respectively used for electrically connecting the battery cell modules in each mounting cavity, thereby better realizing quick connection through the copper bar and the high-voltage box module in the high-voltage box module mounting cavity 4.

[0040] As shown in Figure 3 , as the connection mode of the upper layer liquid cooling plate 1 and the support beam 11, the upper layer liquid cooling plate 1 comprises an upper layer liquid cooling plate body 104 corresponding to the width of the lower layer liquid cooling plate 2, and upper layer liquid cooling plate support edges 105 symmetrically arranged on both sides of the upper layer liquid cooling plate body 104, and the two upper layer liquid cooling plate support edges 105 are respectively supported by the support beam 11.

[0041] Specifically, the support beam 11 and the upper layer liquid cooling plate support edge 105 are both provided with corresponding liquid cooling plate connecting holes 19, and are rotatably connected by liquid cooling plate screws 20, so that the upper layer liquid cooling plate 1 is firmly installed in the battery pack box, and the battery cell modules arranged on the surface thereof are stably supported.

[0042] The front beam plate 6 is further provided with a plurality of sockets 21, inner sides of the sockets 21 being communicated with the high-voltage box module mounting cavity 4, so as to facilitate the quick plug connection between the high-voltage box module mounted in the high-voltage box module mounting cavity 4 and external plug connection.

[0043] The above merely illustrates the implementation modes of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack case having a liquid cooling function, characterized by, The application relates to a high-voltage battery module installation cavity (4) formed between the front baffle (12) and the front beam plate (6), and an electric core module installation cavity (5) formed between the front baffle (12) and the rear beam plate (7), wherein the electric core module installation cavity (5) is divided into an upper electric core module installation cavity (501) and a lower electric core module installation cavity (502) by the upper liquid cooling plate (1). The cooling liquid pipeline assembly (3) is used for synchronously providing liquid cooling circulation for the upper liquid cooling plate (1) and the lower liquid cooling plate (2). The cooling liquid pipeline assembly (3) comprises upper liquid inlet ports (102) and upper liquid outlet ports (103) arranged on the upper liquid cooling plate (1) corresponding to both sides of the cooling liquid pipeline through groove (101); lower liquid inlet ports (201) and lower liquid outlet ports (202) are symmetrically arranged on the lower liquid cooling plate (2) corresponding to the cooling liquid pipeline through groove (101); a vertically-directed lower liquid inlet pipe (301) is arranged on the lower liquid inlet port (201); a horizontally-directed upper liquid inlet pipe (303) is arranged on the upper liquid inlet port (102); the upper liquid inlet pipe (303) and the lower liquid inlet pipe (301) are connected through a three-way liquid inlet joint (305), and an inlet main pipe (307) is connected to the top interface of the three-way liquid inlet joint (305); a vertically-directed lower liquid outlet pipe (302) is arranged on the lower liquid outlet port (202); a horizontally-directed upper liquid outlet pipe (304) is arranged on the upper liquid outlet port (103); the upper liquid outlet pipe (304) and the lower liquid outlet pipe (302) are connected through a three-way liquid outlet joint (306), and an outlet main pipe (308) is connected to the top interface of the three-way liquid outlet joint (306).

2. The battery pack case having a liquid cooling function according to claim 1, characterized in that, The inlet joint (13) and the outlet joint (14) are respectively connected to the inlet main pipe (307) and the outlet main pipe (308), and the inlet joint (13) and the outlet joint (14) are embedded on the front beam plate (6).

3. The battery pack case with liquid cooling function according to claim 2, characterized in that, The upper part of the front baffle (12) and the inner walls of the two side beam plates (8) are respectively fixed through front baffle supporting blocks (15).

4. The battery pack case having a liquid cooling function according to claim 1, characterized in that, ​ 5. The battery pack case having a liquid cooling function according to claim 4, characterized in that, The side of the front baffle (12) is further provided with a first support (16) corresponding to the upper-layer battery cell module mounting cavity (501) and a second support (17) corresponding to the lower-layer battery cell module mounting cavity (502), and an electric connection terminal (18) is arranged on the first support (16) and the second support (17) respectively.

6. The battery pack case having a liquid cooling function according to claim 1, wherein, The upper-layer liquid cooling plate (1) comprises an upper-layer liquid cooling plate body (104) corresponding to the width of the lower-layer liquid cooling plate (2), and upper-layer liquid cooling plate support edges (105) symmetrically arranged on both sides of the upper-layer liquid cooling plate body (104), and the two upper-layer liquid cooling plate support edges (105) are supported by the support beams (11) respectively.

7. The battery pack case having a liquid cooling function according to claim 6, characterized by, Corresponding liquid cooling plate connecting holes (19) are formed on the support beams (11) and the upper-layer liquid cooling plate support edges (105), and the liquid cooling plate connecting holes (19) are screwed by liquid cooling plate screws (20). 8.The battery pack case with a liquid cooling function of claim 1, wherein, The front beam plate (6) is further provided with a plurality of sockets (21), and the inner side of the socket (21) is in communication with the high-voltage box module mounting cavity (4). 9.The battery pack case with liquid cooling function of claim 1, wherein, Further comprising a box cover (22).

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