Fully-immersed battery pack

Abstract

The utility model provides a full-immersion battery pack which comprises a box body, a supporting mechanism and a plurality of battery units, the interior of the box body is hollow, and a heat exchange medium is arranged in the box body; the supporting mechanism is arranged in the box body, a plurality of detachable supporting pieces are arranged on the supporting mechanism, and the supporting pieces are stacked in the axial extending direction of the box body; a plurality of battery units are arranged on the supporting pieces respectively, the heat exchange medium immerses the battery units and flows in the box body to take away heat, the supporting mechanism is arranged in the box body, and the battery units are installed on the supporting mechanism in the vertical direction in a stacked mode, so that the contact area between the battery units and the heat exchange medium is maximized, and the heat exchange efficiency is improved. The heat exchange efficiency is improved, and meanwhile, the space utilization rate of the battery box is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a fully submerged battery pack. Background Art

[0002] The fully submerged PACK battery pack module technology realizes high safety of the battery module by completely immersing the energy storage battery module in a liquid medium and utilizing the high efficient heat conduction and isolation of the liquid.

[0003] A submerged battery pack with the publication number of CN217955965U includes a battery box and batteries. A heat exchange medium is arranged in the battery box. The batteries are arranged in the battery box and at least partially immersed in the heat exchange medium. The battery includes an explosion-proof valve, and the battery has a non-immersed area at the explosion-proof valve, and the non-immersed area is not immersed in the heat exchange medium.

[0004] At present, most of the existing submerged battery packs adopt the horizontal arrangement of the battery modules in the battery box. This installation method has low space utilization rate of the battery box and also reduces the heat dissipation effect of the battery modules. Summary of the Utility Model

[0005] In view of this, the utility model provides a fully submerged battery pack, which arranges and installs the battery modules in a vertically stacked manner. This installation method not only improves the space utilization rate of the battery box, but also improves the heat dissipation effect of the battery modules.

[0006] The technical solution of the utility model is realized as follows: The utility model provides a fully submerged battery pack, including a box body, a support mechanism and a plurality of battery units. Among them,

[0007] The inside of the box body is hollow, and a heat exchange medium is arranged in the box body;

[0008] The support mechanism is arranged in the box body. A plurality of detachable support members are arranged on the support mechanism, and the plurality of support members are stacked along the axial extension direction of the box body;

[0009] The plurality of battery units are respectively arranged on the support members. The heat exchange medium submerges the battery units and flows in the box body to take away heat.

[0010] On the basis of the above technical solutions, preferably, the box body includes an outer shell, a cover body, a first external pipeline and a second external pipeline. Among them,

[0011] The inside of the outer shell is hollow, and one side is open and the other side is closed;

[0012] The cover body is arranged at the opening of the outer shell, and the two are hermetically connected;

[0013] The first external pipeline is arranged on the side of the outer shell away from the cover body, and one end is communicated with the inside of the outer shell, serving as the water outlet end of the box body;

[0014] The second external pipeline is arranged on the outer side of the outer shell, and one end is communicated with the inside of the outer shell, serving as the water inlet end of the box body;

[0015] The first external pipeline and the second external pipeline are respectively communicated with the liquid inlet end and the liquid outlet end of the external circulation device, and the heat exchange medium circulates in the first external pipeline, the second external pipeline and the outer shell.

[0016] On the basis of the above technical solution, preferably, the second external pipeline has a plurality of shunt ports, all of the plurality of shunt ports are communicated with the inside of the outer shell, and the positions of the plurality of shunt ports correspond to the height positions of the respective battery units.

[0017] On the basis of the above technical solution, preferably, the outer contour shape of the box body is one of a cylindrical shape, a polyhedron or a rectangle.

[0018] On the basis of the above technical solution, preferably, each support member includes a plurality of columns, a plurality of connecting seats, a tray, a plurality of support beams and a number of fasteners, wherein,

[0019] The plurality of columns are arranged at intervals and symmetrically centered;

[0020] The plurality of connecting seats are respectively arranged at both ends of each column, and a number of screw holes are formed in each connecting seat;

[0021] The tray is fixed between the plurality of columns for carrying the battery units;

[0022] The plurality of support beams are respectively fixed between two adjacent columns, and are located on the side of the tray away from the opening of the outer shell and abut against the tray

[0023] A number of fasteners are respectively threadedly connected in two adjacent and correspondingly positioned screw holes to fix the positions of two adjacent support members.

[0024] On the basis of the above technical solution, preferably, the support member further includes a plurality of plug-in members, wherein,

[0025] The plurality of plug-in members are respectively fixed on the connecting seats close to the tray side, and plug-in slots penetrating through the columns are formed in the connecting seats on the side away from the tray,

[0026] The plug-in members and the plug-in slots are on the same axis line, and each plug-in member is respectively inserted into the corresponding plug-in slot to position two adjacent support members.

[0027] Based on the above technical solutions, preferably, it further includes a plurality of fixing members. Among them, a plurality of plug connectors at the farthest end away from the opening side of the housing are all abutted against the inner bottom wall of the housing, and a plurality of through holes corresponding to the positions of the screw holes are provided at the bottom of the housing. The plurality of fixing members respectively penetrate through the corresponding through holes and extend into the corresponding screw holes, and the fixing members are threadedly connected with the screw holes, and the fixing members are hermetically connected with the through holes.

[0028] Based on the above technical solutions, preferably, each battery unit includes a plurality of battery modules. Among them, the plurality of battery modules are all arranged on the tray and are arranged at equal intervals in sequence along the radial direction of the tray.

[0029] Based on the above technical solutions, preferably, each battery module includes two brackets, two end plates, a plurality of battery cells and a pressing member. Among them,

[0030] The two brackets are spaced apart and relatively fixed on the tray;

[0031] The two end plates are spaced apart and relatively fixed between the two brackets, and the two end plates are respectively arranged at the outermost ends on both sides of the brackets;

[0032] A plurality of battery cells are arranged between the two opposite brackets along their width directions, and the battery cells are abutted between the two brackets on both sides to limit the width direction of the battery module, and the battery cells at both outermost ends on both sides are respectively abutted against the adjacent end plates to limit the length direction of the battery module;

[0033] The pressing member is fixed between the two end plates on both sides, and the pressing member abuts against the tops of the plurality of battery cells to limit the height direction of the battery module.

[0034] Based on the above technical solutions, preferably, a partition member is provided between two adjacent battery cells. A plurality of through channels are provided on the partition member along the length direction of the battery cells, and the plurality of through channels are arranged at equal intervals along the height direction of the battery cells. The heat exchange medium flows through the through channels to take away the heat between the battery cells.

[0035] The fully immersed battery pack of the present invention has the following beneficial effects compared with the prior art:

[0036] (1) By providing a support mechanism in the box body and installing the battery units in a stacked manner in the vertical direction on the support mechanism, this method maximizes the contact area between the battery units and the heat exchange medium, improves the heat exchange efficiency, and also improves the space utilization rate of the battery box;

[0037] (2) Through the position design of the shunt ports, the heat exchange medium can be evenly and correspondingly distributed around each battery unit during the outflow process, thereby avoiding temperature differences caused by uneven local heat exchange and prolonging the battery life;

[0038] (3) The split design of multiple support members facilitates the assembly of the support mechanism and the installation of the battery module, improving the installation efficiency.

[0039] (4) By providing several through-flow channels on the partition member, a channel for the flow of the heat exchange medium is provided, enabling the heat generated by each battery cell to be directly transferred to the heat exchange medium and taken away directly, thus improving the heat exchange effect. Description of the Drawings

[0040] 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 be obtained based on these drawings.

[0041] Figure 1 It is a cross-sectional view of the fully submerged battery pack of the present invention;

[0042] Figure 2 It is a three-dimensional view of the fully submerged battery pack of the present invention;

[0043] Figure 3 It is a three-dimensional view of the connection structure between the support mechanism and the battery unit of the fully submerged battery pack of the present invention;

[0044] Figure 4 It is a three-dimensional view of the support mechanism of the fully submerged battery pack of the present invention;

[0045] Figure 5 It is a three-dimensional view of the battery module of the fully submerged battery pack of the present invention;

[0046] Figure 6 It is a three-dimensional view of the partition member of the fully submerged battery pack of the present invention. Detailed Embodiments

[0047] The following will describe clearly and completely the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0048] As Figure 1-6As shown in the figure, a fully submerged battery pack of the present utility model includes a box body 1, a support mechanism 2, and a plurality of battery units 3. Among them, the interior of the box body 1 is hollow, and a heat exchange medium is provided inside the box body 1; the support mechanism 2 is arranged inside the box body 1, and a plurality of detachable support members 21 are provided on the support mechanism 2, and the plurality of support members 21 are stacked along the axial extension direction of the box body 1; the plurality of battery units 3 are respectively arranged on each support member 21, and the heat exchange medium submerges the battery units 3 and flows inside the box body 1 to take away heat.

[0049] It should be noted that the support mechanism 2 is arranged inside the box body 1, and the battery units 3 are installed on the support mechanism 2 in a stacked manner in the vertical direction. This method maximizes the contact area between the battery units 3 and the heat exchange medium, improves the heat exchange efficiency, and at the same time improves the space utilization rate of the battery box.

[0050] The box body 1 in this embodiment includes a housing 11, a cover body 12, a first external pipeline 13, and a second external pipeline 14. Among them, the interior of the housing 11 is hollow, and one side is open and the other side is closed; the cover body 12 is arranged at the opening of the housing 11 and is hermetically connected to the housing 11; the first external pipeline 13 is arranged on the side of the housing 11 away from the cover body 12, and one end is connected to the inside of the housing 11 and serves as the water outlet end of the box body 1; the second external pipeline 14 is arranged on the outside of the housing 11, and one end is connected to the inside of the housing 11 and serves as the water inlet end of the box body 1; the first external pipeline 13 and the second external pipeline 14 are respectively connected to the liquid inlet end and the liquid outlet end of an external circulation device, and the heat exchange medium circulates inside the first external pipeline 13, the second external pipeline 14, and the housing 11.

[0051] It should be noted that a sealing ring is provided at the connection between the housing 11 and the cover body 12 to ensure the sealing between the housing 11 and the cover body 12 and prevent the heat exchange medium from leaking. Among them, the heat exchange medium entering the box body 1 through the second external pipeline 14 absorbs heat during the process of completely submerging the battery units 3, and then is discharged through the first external pipeline 13. During this process, the heat exchange medium continuously circulates to achieve efficient cooling of the battery units.

[0052] In this embodiment, the second external pipeline 14 has a plurality of shunt ports 400, and the plurality of shunt ports 400 are all connected to the inside of the housing 11, and the positions of the plurality of shunt ports 400 correspond to the height positions of the respective battery units 3.

[0053] It should be noted that the position design of the shunt ports 400 enables the heat exchange medium to be evenly and correspondingly distributed around each battery unit during the outflow process, thereby avoiding temperature differences caused by uneven local heat exchange and prolonging the battery life.

[0054] In this embodiment, the outer contour shape of the box body 1 is one of a cylindrical shape, a polyhedron or a rectangle.

[0055] Specifically, in this embodiment, the outer contour shape of the box body 1 is preferably cylindrical.

[0056] In this embodiment, each support member 21 includes a plurality of columns 211, a plurality of connection seats 212, a tray 213, a plurality of support beams 214 and a number of fasteners 215. Among them, the plurality of columns 211 are arranged at intervals and centrosymmetrically; the plurality of connection seats 212 are respectively arranged at both ends of each column 211, and a number of screw holes are provided on each connection seat 212; the tray 213 is fixed between the plurality of columns 211 for carrying the battery unit 3; the plurality of support beams 214 are respectively fixed between two adjacent columns 211, and are located on the side of the tray 213 away from the opening of the outer shell 11 and are in contact with the tray 213. A number of fasteners 215 are respectively threadedly connected in two adjacent and corresponding screw holes to fix the positions of two adjacent support members 21.

[0057] It should be noted that each support member 21 in this embodiment is provided with four columns 211. Connection seats 212 are fixedly arranged at both ends of each column 211. The connection seat 212 is triangular in shape, and screw holes are provided at the corners of the connection seat 212 for installing fasteners 215 to fix adjacent support members 21. Among them, the four columns 211 are centrosymmetrically arranged, which enhances the overall stability of the support member 21. The support beam 214 is in contact with the tray 213 to provide additional support force to prevent the tray 213 from deforming or being damaged when carrying the battery unit 3, enhancing the overall stiffness of the support member 21 and making it more stable and reliable.

[0058] In this embodiment, the support member 21 further includes a plurality of plug-in members 216. Among them, the plurality of plug-in members 216 are respectively fixed on the connection seats 212 close to the tray 213 side. Plug-in slots 200 penetrating into the columns 211 are provided on the connection seats 212 on the side away from the tray 213. The plug-in members 216 and the plug-in slots 200 are on the same axis line. Each plug-in member 216 is respectively inserted into the corresponding plug-in slot 200 to position two adjacent support members 21.

[0059] It should be noted that the inner contour shape of the plug-in slot 200 matches the outer contour shape of the plug-in member 216. Through the plurality of plug-in members 216 and the corresponding plug-in slots 200, precise positioning and rapid connection between two adjacent support members 21 are realized, which is convenient for the installation of a plurality of support members 21.

[0060] This embodiment further includes a plurality of fixing members 4. Among them, a plurality of plug connectors 216 at the farthest end away from the opening side of the housing 11 are all abutted against the inner bottom wall of the housing 11, and a plurality of through holes corresponding to the positions of the screw holes are formed at the bottom of the housing 11. The plurality of fixing members 4 respectively penetrate through the corresponding through holes and extend into the corresponding screw holes, and the fixing members 4 are in threaded connection with the screw holes, and the fixing members 4 are in sealed connection with the through holes.

[0061] In this embodiment, each battery unit 3 includes a plurality of battery modules 31. Among them, the plurality of battery modules 31 are all arranged on the tray 213 and are arranged at equal intervals in the radial direction of the tray 213 in sequence.

[0062] It should be noted that the shape of the tray 213 in this embodiment is circular. Five battery modules 31 are arranged on the tray 213 in the radial direction of the tray 213. Among them, the first arranged battery module 31 and the fifth battery module 31 have the same size, the second arranged battery module 31 and the fourth battery module 31 have the same size, the third battery module 31 is located at the center of the tray 213, the first battery module 31 and the fifth battery module 31 and the second battery module 31 and the fourth battery module 31 are symmetrically arranged with the third battery module 31 as the center, and the length of the third battery module 31 is greater than that of the second battery module 31, and the length of the second battery module 31 is greater than that of the first battery module 31.

[0063] Since the battery module 31 is immersed in the heat exchange medium, glue fixing is not considered for fixing the battery cells 313. Therefore, each battery module 31 in this embodiment includes two brackets 311, two end plates 312, a plurality of battery cells 313 and a pressing member 314. Among them, the two brackets 311 are spaced apart and relatively fixed on the tray 213; the two end plates 312 are spaced apart and relatively fixed between the two brackets 311, and the two end plates 312 are respectively arranged at the outermost ends on both sides of the brackets 311; the plurality of battery cells 313 are arranged in the width direction between the two opposite brackets 311, and the battery cells 313 are abutted between the two brackets 311 on both sides to limit the width direction of the battery module 31, and the battery cells 313 at the outermost ends on both sides are respectively abutted against the adjacent end plates 312 to limit the length direction of the battery module 31; the pressing member 314 is fixed between the two end plates 312 on both sides, and the pressing member 314 abuts against the tops of the plurality of battery cells 313 to limit the height direction of the battery module 31.

[0064] It should be noted that arranging the plurality of battery cells 313 between the two opposite brackets 311, end plates 312 and pressing member 314 enables the battery module 31 to be effectively limited and fixed in three directions, ensuring its stability under various working conditions.

[0065] In this embodiment, a partition member 315 is provided between two adjacent battery cells 313. A plurality of through channels 300 are formed in the partition member 315 along the length direction of the battery cell 313. The plurality of through channels 300 are arranged at equal intervals along the height direction of the battery cell 313. The heat exchange medium flows through the through channels 300 to take away the heat between the battery cells 313.

[0066] It should be noted that the partition member 315 plays a role of physical isolation, separating adjacent battery cells 313 to prevent them from directly contacting and short - circuiting. By forming a plurality of through channels 300 in the partition member 315, a channel for the flow of the heat exchange medium is provided, enabling the heat generated by each battery cell 313 to be directly transferred to the heat exchange medium and taken away directly, thereby improving the heat exchange effect.

[0067] Working principle:

[0068] First, a plurality of battery cells 313 are fixed on the tray 213 through the cooperation of the bracket 311, the end plate 312 and the pressing member 314 according to the hierarchy to form a battery module 31. Multiple battery modules 31 on the same layer form a battery unit 3. Then, the support members 21 are assembled in a stacked manner. Through a plurality of plug - in members 216 and corresponding plug - in slots 200, precise positioning and rapid connection between two adjacent support members 21 are achieved. Then, the fasteners 215 are installed into the corresponding screw holes to fix the adjacent support members 21, forming a support mechanism 2. The support mechanism 2 is hoisted into the housing 11, and the through - hole position is made to correspond to the screw - hole position. The support mechanism 2 is fixed on the housing 11 through the fixing member 4. Then, the cover 12 is hermetically fixed to the housing 11. The heat exchange medium enters the housing 11 through the second external pipeline 14, flows through each battery unit 3 and the through channels 300, and then flows out from the first external pipeline 13. The heat exchange medium circulates to take away the heat of the battery cells 313.

[0069] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fully submerged battery pack, characterized in that, It includes a box body (1), a support mechanism (2) and a number of battery units (3). Among them, The interior of the box body (1) is hollow, and a heat exchange medium is provided inside the box body (1); The support mechanism (2) is arranged inside the box body (1). A number of detachable support members (21) are provided on the support mechanism (2), and the number of support members (21) is stacked along the axial extension direction of the box body (1); A number of battery units (3) are respectively arranged on each support member (21). The heat exchange medium submerges the battery units (3) and flows inside the box body (1) to take away the heat.

2. The fully submerged battery pack according to claim 1, wherein: The box body (1) includes a housing (11), a cover body (12), a first external pipeline (13) and a second external pipeline (14). Among them, The interior of the housing (11) is hollow, and one side is open and the other side is closed; The cover body (12) is arranged at the opening of the housing (11), and the two are sealed and connected; The first external pipeline (13) is arranged on the side of the housing (11) away from the cover body (12), and one end is connected to the inside of the housing (11), serving as the water outlet end of the box body (1); The second external pipeline (14) is arranged on the outside of the housing (11), and one end is connected to the inside of the housing (11), serving as the water inlet end of the box body (1); The first external pipeline (13) and the second external pipeline (14) are respectively connected to the liquid inlet end and the liquid outlet end of an external circulation device, and the heat exchange medium circulates inside the first external pipeline (13), the second external pipeline (14) and the housing (11).

3. The fully submerged battery pack according to claim 2, characterized in that: The second external pipeline (14) has a number of shunt ports (400). The number of shunt ports (400) are all connected to the inside of the housing (11), and the positions of the number of shunt ports (400) correspond to the height positions of the respective battery units (3).

4. The fully submerged battery pack according to claim 2, wherein: The outer contour shape of the box body (1) is one of a cylindrical shape, a polyhedron or a rectangle.

5. The fully submerged battery pack according to claim 2, characterized in that: Each of the support members (21) includes a plurality of columns (211), a plurality of connecting seats (212), a tray (213), a plurality of support beams (214) and a number of fasteners (215). Among them, The plurality of columns (211) are arranged at intervals and centrosymmetrically; The plurality of connecting seats (212) are respectively arranged at both ends of each column (211), and a number of screw holes are provided on each connecting seat (212); The tray (213) is fixed between the plurality of columns (211) for carrying the battery units (3); The plurality of support beams (214) are respectively fixed between two adjacent columns (211), and are located on the side of the tray (213) away from the opening of the housing (11) and are in contact with the tray (213) A number of fasteners (215) are respectively threadedly connected in two adjacent and correspondingly positioned screw holes to fix the positions of two adjacent support members (21).

6. The fully submerged battery pack according to claim 5, characterized in that: The support member (21) further includes a plurality of plug-in members (216). Among them, The plurality of plug-in members (216) are respectively fixed on the connecting seats (212) close to the tray (213). Plug-in slots (200) penetrating into the columns (211) are provided on the connecting seats (212) on the side away from the tray (213), The connector (216) and the socket (200) are on the same axis. Each connector (216) is inserted into the corresponding socket (200) to position two adjacent support members (21).

7. The fully submerged battery pack according to claim 6, wherein: It further includes a number of fixing members (4). Among them, a plurality of connectors (216) at the farthest end from the opening side of the housing (11) are all abutted against the inner bottom wall of the housing (11). And a number of through holes corresponding to the positions of the screw holes are provided at the bottom of the housing (11). The number of fixing members (4) respectively pass through the corresponding through holes and extend into the corresponding screw holes. And the fixing members (4) are threadedly connected with the screw holes, and the fixing members (4) are hermetically connected with the through holes.

8. The fully submerged battery pack according to claim 5, characterized in that: Each battery unit (3) includes a number of battery modules (31). Among them, the number of battery modules (31) are all arranged on the tray (213) and are arranged at equal intervals in the radial direction of the tray (213) in sequence.

9. The fully submerged battery pack according to claim 8, wherein: Each battery module (31) includes two brackets (311), two end plates (312), a number of battery cells (313) and a pressing member (314). Among them, The two brackets (311) are spaced apart and relatively fixed on the tray (213); The two end plates (312) are spaced apart and relatively fixed between the two brackets (311), and the two end plates (312) are respectively arranged at the outermost ends on both sides of the brackets (311); A number of battery cells (313) are arranged between the two opposite brackets (311) along their width direction, and the battery cells (313) are abutted between the brackets (311) on both sides to limit the width direction of the battery module (31). And the battery cells (313) at the outermost ends on both sides are respectively abutted against the adjacent end plates (312) to limit the length direction of the battery module (31); The pressing member (314) is fixed between the end plates (312) on both sides, and the pressing member (314) is abutted against the tops of the number of battery cells (313) to limit the height direction of the battery module (31).

10. The fully submerged battery pack according to claim 9, wherein: A partition member (315) is arranged between two adjacent battery cells (313). A number of through channels (300) are provided on the partition member (315) along the length direction of the battery cells (313). The number of through channels (300) are arranged at equal intervals along the height direction of the battery cells (313). The heat exchange medium flows through the through channels (300) to take away the heat between the battery cells (313).

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