CN220895612U

CN220895612U - Submerged battery system

Info

Publication number: CN220895612U
Application number: CN202322358541.9U
Authority: CN
Inventors: 高文强; 李健通; 陈睿; 沈海涛; 朱晓明; 陈婷
Original assignee: Lishen Qingdao New Energy Co Ltd
Current assignee: Lishen Qingdao New Energy Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-05-03
Anticipated expiration: 2033-08-31

Abstract

The utility model discloses an immersed battery system, which comprises a box body formed by connecting an upper cover body and a lower box body, wherein a battery module is arranged in the box body and is filled with cooling liquid, the battery module is immersed in the cooling liquid, a liquid inlet and a liquid outlet are formed in the side wall of the lower box body, the battery module comprises a heat conducting plate assembly, the heat conducting plate assembly is arranged to form a plurality of independent battery cell positioning spaces, and a single battery cell of the battery module is correspondingly arranged in one battery cell positioning space and is contacted with the heat conducting plate, so that the mutual isolation between two adjacent battery cells is realized. The heat conducting plate assembly of the immersed battery system is filled between the battery cells through the heat conducting plates, so that heat generated by the large surface of the battery cells can be transferred to a region with larger flow of cooling liquid, and meanwhile, the battery cells are positioned and the module structure is enhanced.

Description

Submerged battery system

Technical Field

The utility model relates to the technical field of battery systems, in particular to an immersed battery system.

Background

Among the techniques of heat dissipation of battery systems, there is a technology of heat dissipation of a battery system by using an immersion liquid cooling method to improve the thermal management performance of the battery system. Because the battery and the battery gap in the battery module are smaller, and the inter-core filler exists in the battery gap, the flow resistance of the cooling liquid flowing between the battery cores is larger, and the cooling efficiency is reduced. In addition, the battery box body is filled with cooling liquid, and once the battery core is in thermal runaway, the pressure cannot be effectively discharged, so that serious potential safety hazards can be caused.

Disclosure of utility model

The present utility model is directed to solving the problems of the prior art and provides a novel structure of an immersion type battery system.

The utility model is realized in the following way:

The immersed battery system comprises a box body formed by connecting an upper cover body and a lower box body, wherein a battery module is arranged in the box body, the battery module is immersed in cooling liquid, a liquid inlet and a liquid outlet are formed in the side wall of the lower box body, the battery module comprises a heat conducting plate assembly, a plurality of independent battery cell positioning spaces are formed by arranging and arranging the heat conducting plate assembly, and single battery cells of the battery module are correspondingly arranged in one battery cell positioning space and are mutually contacted with the heat conducting plates, so that mutual isolation between two adjacent battery cells is realized.

The heat conducting plate assembly comprises a transverse heat conducting plate and a longitudinal heat conducting plate, a plurality of the longitudinal heat conducting plates are mutually separated along the thickness direction of the heat conducting plates, and two ends of the heat conducting plates are respectively connected with the two transverse heat conducting plates, so that a plurality of electric core positioning spaces are formed.

After the battery cells are arranged in the battery cell positioning space, the opposite ends of the heat conducting plate assembly are fixedly connected with one end plate respectively to form the battery module.

The upper cover body is detachably connected with the lower box body, and the battery module is arranged in the space of the lower box body and is connected with the inner bottom of the lower box body through structural adhesive.

The upper cover body is connected with the lower box body through a plurality of fasteners which are perpendicular to the surface of the box body and are arranged around the periphery of the box body.

The lower box body is internally provided with an isolation beam, the space in the lower box body is divided into two battery module spaces, and the two battery modules are respectively arranged in one battery module space.

The front side beam of the lower box body and the lower parts of the two opposite side beams parallel to the isolation beam are respectively provided with a cooling liquid inflow channel which is communicated with each other and forms a U-shaped liquid flow channel;

The front end lower part of the isolation beam is provided with a cooling liquid inflow cavity extending out of the front edge beam, the cooling liquid inflow cavity is connected with a liquid inlet orifice of the liquid flow channel, the upper part of the cooling liquid inflow cavity is provided with a liquid outlet orifice, a cooling liquid outflow channel is arranged above the inside of the isolation beam, and the cooling liquid outflow channel is used for discharging cooling liquid in the box body through a liquid outlet.

The bottoms of the two side beams are respectively provided with a plurality of liquid outlet holes along the length direction of the side beams, and the liquid outlet holes are communicated with the cooling liquid inflow channels respectively arranged below the inner parts of the corresponding side beams;

The upper part of the isolation beam is provided with a plurality of liquid inlets along the length direction of the isolation beam, the liquid inlets are communicated with the cooling liquid outflow channel, and the cooling liquid outflow channel is communicated with the liquid outlet of the lower box body;

Two opposite sides of the notch below the middle part of the front side beam are respectively provided with one liquid inlet hole, and liquid discharge holes are respectively formed at the lower parts of the two side beams, so that the cooling liquid inflow channel of the front side beam is communicated with the cooling liquid inflow channel in the side beams through the liquid discharge holes.

The upper cover body comprises a top plate body and a pressure relief channel cover plate fixed on the inner surface of the top plate body, the top plate body is provided with a groove-shaped pressure relief channel protruding out of the outer surface of the top plate body, the inner side of the groove-shaped pressure relief channel is provided with a pressure relief channel cover plate which is adaptive to the shape of the groove-shaped pressure relief channel, and the pressure relief channel cover plate is provided with at least one pressure relief hole.

Wherein the front side beam, the isolation beam and two opposite side beams parallel to the isolation beam are independently provided with at least three cavities.

According to the immersed battery system, as the battery cells of the battery module are separated by the heat conducting plates and positioned and fixed, the battery cells are separated by the heat conducting plates arranged between the battery cells, no filler is arranged between the battery cells, and the heat generated by the large surface of the battery cells can be transferred to a region with larger flow of cooling liquid through the heat conducting plates arranged outside the connection of the heat conducting plates separating the battery cells, so that the cooling efficiency of the battery system is improved to a certain extent, and the heat management performance is improved; the heat conductive plate assembly also enables structural reinforcement of the battery system.

According to the immersed battery system, the pressure release channel is arranged at the preset position of the upper box plate of the box body, so that when the pressure in the battery box rises after the electric core of the battery module is out of control, liquid in the box body can enter the pressure release channel to release pressure, the safety of the battery system is ensured, and the safety of the battery system is greatly improved.

Drawings

Fig. 1 is a schematic view of an immersion battery system of the present utility model.

Fig. 2 is a schematic view of a lower case of the submerged battery system of the present utility model.

Fig. 3 is a schematic view of a battery module of the submerged battery system according to the present utility model.

Fig. 4 is a schematic view of a thermally conductive plate assembly of the submerged battery system of the present utility model.

Fig. 5 is a schematic front view of a right side rail of the case of the submerged battery system of the present utility model.

Fig. 6 is an isometric view of a right side rail of the submerged battery system housing of the present utility model.

Fig. 7 is a schematic front view of a spacer beam of a submerged battery system housing of the present utility model.

Fig. 8 is an isometric view of a spacer beam of the case of the submerged battery system of the present utility model.

Fig. 9 is a schematic front view of a front side rail of a case of the submerged battery system of the present utility model.

Fig. 10 is an isometric view of a case front side rail of the submerged battery system of the present utility model.

Fig. 11 is a schematic flow diagram of the circulating flow of the cooling liquid of the submerged battery system of the present utility model.

Fig. 12 is a top view of an upper cover of the submerged battery system of the present utility model.

Fig. 13 is a schematic view of a pressure relief channel cover plate for an submerged battery system according to the present utility model.

Fig. 14 is a bottom view of the upper cover of the submerged battery system of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1 to 11, the utility model provides an immersed battery system, which comprises a case body formed by connecting an upper cover body 1 and a lower case body 2, wherein a battery module 7 is arranged in the case body and is filled with cooling liquid, the battery module 7 is immersed in the cooling liquid, a liquid inlet 3 and a liquid outlet 4 are arranged on the side wall of the lower case body, the battery module 7 comprises a heat-conducting plate assembly, a plurality of heat-conducting plates of the heat-conducting plate assembly are horizontally and longitudinally arranged to form a plurality of independent battery cell positioning spaces 705, and a single battery cell 703 of the battery module is correspondingly arranged in one battery cell positioning space 705 and is mutually contacted with the heat-conducting plates on the outer side, so that mutual isolation between two adjacent battery cells 703 is realized.

According to the immersed battery system provided by the embodiment of the utility model, as the battery cells of the battery module are separated by the heat conducting plates and positioned and fixed, the battery cells are separated by the heat conducting plates, no filler is required to be arranged between the battery cells, the heat conducting plates of which the inner sides are separated from the battery cells are contacted with the large surfaces of the battery cells, and the heat generated by the large surfaces of the battery cells can be transferred to a region with larger flow of cooling liquid through the connected outer heat conducting plates, so that the cooling efficiency of the battery system is improved, and the heat management performance is improved; and the heat conduction plate assembly structure can also realize structural reinforcement of the battery system.

In some embodiments, referring to fig. 4, the heat conducting plate assembly includes a transverse heat conducting plate 704 and a longitudinal heat conducting plate 706, where a plurality of the longitudinal heat conducting plates are spaced apart from each other along a thickness direction thereof, and two ends of the longitudinal heat conducting plates are respectively connected with two transverse heat conducting plates, so as to form a plurality of the cell positioning spaces, and the transverse heat conducting plate and the longitudinal heat conducting plate may be fixedly connected after being prefabricated and formed into the cell positioning spaces, and may be welded and connected or connected with each other by a conventional plate-to-plate plugging manner through gaps.

The battery cells 703 of the battery module 7 are connected through a busbar 701, end plates 702 are respectively arranged at two ends of the battery module 7, the end plates 702 are fixedly connected with the transverse heat conducting plates 704 of the heat conducting plate assembly to jointly form the battery module, and the heat conducting plates of the heat conducting plate assembly can be made of metal materials with good heat conducting performance such as copper plates or aluminum plates.

In some embodiments, the battery module 7 is disposed in the space of the lower case 2 and is connected with the inner bottom of the lower case 2 through structural adhesive, as a preferred embodiment, the upper cover 1 is detachably connected with the lower case 2, so as to facilitate assembly and maintenance of the battery module 7, and the specific connection may be that the upper cover 1 is connected with the lower case 2 through a plurality of fasteners perpendicular to the surface of the case and disposed around the periphery of the case, and a plurality of fastener holes 103 disposed at intervals are disposed at positions near the outer circumferences of the upper cover 1 and the lower case 2 so as to facilitate installation of fasteners, which may be bolts.

In assembling or assembling the immersed battery system of the embodiment of the utility model, firstly, placing the battery cells of the battery module in a gap of a battery cell positioning space formed by the heat conducting plate assembly, and connecting the battery cells with the end plate 702 after the placement is completed to form the battery module; and then the assembled module is placed into a lower box body by using a clamping tool, the assembled module is connected with the bottom of the lower box body through structural adhesive, and finally the upper cover body is bolted with the lower box body to form a battery system.

In some embodiments, as shown in fig. 2, the lower case is formed by connecting a front side beam 5, a rear side beam 8, a left side beam 10 and a right side beam 6 in a rectangular shape, the placement space of the battery modules is rectangular, and an isolation beam 9 is disposed in the lower case to separate the space in the lower case from two battery module spaces, and two battery modules 7 are respectively disposed in one of the battery module spaces to form one submerged battery system.

In some embodiments, referring to fig. 5, 6, 7, 8 and fig. 9 and 10, the front side beam 5 of the lower case and two opposite side beams (i.e. the left side beam 10 and the right side beam 6) parallel to the isolation beam 9 are respectively provided with a cooling liquid inflow channel below the interiors thereof and are communicated with each other to form a U-shaped liquid flow channel; the cooling liquid inflow channel 602 of the side beam is shown in fig. 6, and is formed between an inner plate body and an outer plate body of the side beam, the two plate bodies are connected through a rib plate, the rear end of the cooling liquid inflow channel 602 is closed by a rear side beam, the structure of the front side beam 5 is the same as that of the side beam, except that the liquid inlet 504 of the cooling liquid inflow channel of the front side beam is arranged at the middle lower part of the front side beam and is used as the liquid inlet of the liquid flow channel, the two ends of the front side beam are closed, and the cooling liquid flows out from the inner side surfaces near the two ends; the lower part of the front end of the isolation beam 9 is provided with a cooling liquid inflow cavity 903 extending out of the front edge beam, an external liquid inlet is realized by connecting a liquid inlet 905 with a liquid inlet 3, the cooling liquid inflow cavity 903 sends cooling liquid into a lower box body through a liquid outlet 902, the liquid outlet 902 is arranged at the upper part of the cooling liquid inflow cavity 903, and as shown in fig. 7 and 8, the liquid outlet 902 can be arranged in a plurality along the length direction of the cooling liquid inflow cavity 903; the cooling liquid outflow channel 904 is arranged above the isolation beam 9, the outlet of the cooling liquid outflow channel 904 is a liquid outlet hole of the cooling liquid outflow channel, the outlet is connected with the liquid outlet 4 to realize outflow of cooling liquid in the box body, after the cooling liquid enters from the front side beam, the cooling liquid flows into the box body of the battery through the side beam and the isolation beam, then flows out through the isolation beam, a circulation system is formed in the box body to realize effective cooling treatment of the battery, the inflow and outflow channels of the cooling liquid are integrated in the front side beam, the side beam and the isolation beam to form a whole, and the space of the box body is not occupied independently, so that the structure of the box body is simpler, and the battery module is easier to arrange.

In some embodiments, referring to fig. 5 and 6, the bottoms of the two side beams are respectively provided with a plurality of liquid outlets 601 along the length direction of the side beams; the liquid outlet holes are communicated with cooling liquid inflow channels respectively arranged below the inner parts of the corresponding side beams; the upper part of the isolation beam 9 is provided with a plurality of liquid inlets 901 along the length direction of the isolation beam, and the liquid inlets 901 are communicated with the cooling liquid outflow channel; the two opposite sides of the notch 503 below the middle of the front side beam 5 are respectively provided with a liquid inlet hole 504, a liquid outlet hole 502 is respectively formed at the lower parts of the two side beams, the cooling liquid inflow channel of the front side beam between the liquid inlet holes 504 and the liquid outlet holes 502 is communicated with the cooling liquid inflow channel in the side beam through the liquid outlet holes 502, and the upper notch 501 is formed at the middle upper part of the front side beam 5 and can be used for installing and fixing a liquid outlet 4 connected with the liquid outlet hole of the cooling liquid outflow channel of the isolation beam 9.

In the embodiment of the application, the liquid inlet and outlet of the immersed battery system are respectively connected with the liquid inlet and outlet holes of the flow channel in the box body to form a cooling liquid circulation system, as shown in fig. 11, when the cooling liquid flows, the cooling liquid flows according to the arrow indication shown in fig. 11 and the sequence of English letters, flows in the direction of a-b-c-d-e after entering from the liquid inlet 3, finally returns to the liquid outlet 4 to flow out, the cooling liquid firstly enters the inner bottom of the front side beam through the liquid inlet from the liquid inlet at the lower part, then flows into the side beams at the bottom to two sides, flows into the box body of the battery system through the liquid outlet holes at the positions of the lower parts of the left side beam and the right side beam near the bottom, returns to the liquid outlet at the upper part through the liquid inlet holes at the upper parts near the top ends of the isolation beams in the box body after circulation, and flows out of the box body of the immersed battery system. Through inlet opening, flowing back hole, play liquid hole and the income liquid hole of arranging above, can realize that the coolant liquid gets into the back and flows from the bottom through the length direction of perpendicular to side roof beam, flows to the isolation roof beam, then flows through the upper portion of isolation roof beam, forms circulation system, and the cooling effect is better.

In some embodiments, the front side beam, the spacer beam, and two opposing side beams parallel to the spacer beam are independently provided with at least three cavities. If the front side beam and the isolation beam are independently provided with a liquid inlet channel cavity, an isolation cavity and a liquid outlet channel cavity from bottom to top, the arrangement of the isolation cavity is favorable for reducing liquid flow resistance and reducing the weight of the battery module, and the number of the isolation cavities can be multiple, but the manufacturing process difficulty and the cost can be increased, so that 1 isolation cavity is preferably arranged. In order to maintain profile consistency, at least 3 mold cavities are also independently provided on two opposite side rails parallel to the spacer beam, wherein the lowest mold cavity is used for the inflow of cooling liquid.

In addition, in some embodiments, one end of the case forms a protrusion, so that the case is in a convex shape as a whole, a management system or a control system of the battery system can be placed in the protrusion space, and the liquid outlet and the liquid inlet are arranged on the outer wall of the protrusion.

Referring to fig. 12 to 14, in some embodiments, the top surface of the upper cover body protrudes from inside to outside through a groove-shaped pressure release channel 102 formed by a stamping process at a predetermined position and a predetermined region of the top plate body, a pressure release channel cover plate 104 adapted to the shape of the groove-shaped pressure release channel is disposed on the inner side of the groove-shaped pressure release channel, and at least one pressure release hole 105 is formed on the pressure release channel cover plate. The pressure relief channel cover plate is fixed with the inner surface of the upper cover body, for example, the pressure relief channel cover plate and the upper cover body can be fixed together through structural adhesive. The pressure release channel is arranged in the stamping area of the upper cover body, and the safety of the battery system is greatly improved while other structural parts are not required to be additionally arranged.

In the embodiment of the present utility model, the shape of the groove-shaped pressure release channel may be set to different shapes according to actual needs, may be a cross shape as shown in the figure, may be other shapes, such as a circle or any geometric shape, and is not particularly limited. The section of the groove-type pressure relief channel can be rectangular, arc-shaped or triangular, trapezoid and the like.

According to the immersed battery system provided by the embodiment of the utility model, the pressure release channel is arranged at the preset position of the upper box plate of the box body, so that when the pressure in the battery box rises after the electric core of the battery module is out of control, the liquid in the box body can enter the pressure release channel to release pressure, the safety of the battery system is ensured, and the safety of the battery system is greatly improved.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. The immersed battery system comprises a box body formed by connecting an upper cover body and a lower box body, wherein a battery module is arranged in the box body and immersed in cooling liquid, and a liquid inlet and a liquid outlet are formed in the side wall of the lower box body.

2. The submerged battery system of claim 1, wherein the heat conducting plate assembly comprises a lateral heat conducting plate and a longitudinal heat conducting plate, a plurality of the longitudinal heat conducting plates are spaced apart from each other in a thickness direction thereof, and both ends are respectively connected with two of the lateral heat conducting plates, thereby forming a plurality of the cell positioning spaces.

3. The submerged battery system of claim 1, wherein the opposite ends of the thermally conductive plate assembly are each fixedly connected to an end plate to form the battery module after the cells are installed in the cell positioning space.

4. The submerged battery system of claim 1, wherein the upper cover is detachably connected to the lower case, and the battery module is disposed in a space of the lower case and connected to an inner bottom of the lower case through a structural adhesive.

5. The submerged battery system of claim 1, wherein the upper cover is connected to the lower tank by a plurality of fasteners arranged perpendicular to the surface of the tank and around the perimeter of the tank.

6. The submerged battery system of claim 1, wherein an isolating beam is provided in the lower case to divide the space in the lower case into two battery module spaces, and wherein the two battery modules are each arranged in one of the battery module spaces.

7. The submerged battery system of claim 6, wherein the front side rail of the lower case and the inner lower sides of two opposite side rails parallel to the separator rail are respectively provided with a coolant inflow flow channel and communicate, and form a U-shaped flow channel;

8. The submerged battery system of claim 7, wherein the bottoms of the two side rails are each provided with a plurality of liquid outlet holes along the length direction of the side rails, and the plurality of liquid outlet holes are communicated with the respective cooling liquid inflow channels arranged below the inner parts of the corresponding side rails;

9. The submerged battery system of claim 1, wherein the upper cover body comprises a top plate body and a pressure relief channel cover plate fixed on the inner surface of the top plate body, the top plate body is provided with a groove-shaped pressure relief channel protruding out of the outer surface of the top plate body, the inner side of the groove-shaped pressure relief channel is provided with a pressure relief channel cover plate which is adapted to the shape of the groove-shaped pressure relief channel, and the pressure relief channel cover plate is provided with at least one pressure relief hole.

10. The submerged battery system of claim 7, wherein the front side rail, the spacer rail, and two opposing side rails parallel to the spacer rail are independently provided with at least three cavities.