Immersed battery system

Abstract

The utility model provides an immersed battery system. The immersed battery system comprises a box body, a plurality of battery modules and a box cover, the plurality of battery modules are arranged at the bottom of the box body at intervals, a liquid inlet and a liquid outlet are formed in the side wall of the box body, the liquid inlet and the liquid outlet are formed in the diagonal line of the box body, the height of the liquid inlet is lower than that of the liquid outlet, and the box cover is arranged on the box body. A cooling medium enters the box body from the liquid inlet, gradually immerses the battery modules and is discharged from the liquid outlet, a partition plate is arranged between every two adjacent battery modules, an immersion channel for the cooling medium to flow is arranged in each partition plate, and the immersion channels are uniformly arranged at intervals. A cooling medium circulates among the battery modules through the immersion channel, a sealing ring is arranged at the top of the box body, and the sealing ring is clamped between the box body and the box cover.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heat dissipation, in particular to an immersion battery system. Background Art

[0002] As end customers' requirements for fast charging time of new energy vehicles increase, battery manufacturers are also continuously improving the battery charging rate. When charging at high rates (above 4C), the current liquid cooling plate cooling solution can no longer meet the battery heat dissipation requirements, and a battery heat dissipation solution is urgently needed. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies of the above-mentioned prior art and to provide an immersion battery system, in which the battery cells are immersed in a cooling medium, and the cooling medium is in full contact with the battery module to improve the heat transfer efficiency.

[0004] The utility model provides an immersion battery system, comprising a box body, a battery module, and a box cover, wherein a plurality of the battery modules are arranged at intervals at the bottom of the box body, a liquid inlet and a liquid outlet are arranged on the side wall of the box body, the liquid inlet and the liquid outlet are arranged on the diagonal line of the box body, the height of the liquid inlet is lower than the height of the liquid outlet, a cooling medium enters the box body through the liquid inlet and gradually immerses the battery module, and is discharged from the liquid outlet, a partition plate is arranged between two adjacent battery modules, an immersion channel for the cooling medium to flow is arranged in the partition plate, a plurality of the immersion channels are arranged evenly at intervals, the cooling medium flows between the battery modules through the immersion channels, a sealing ring is arranged on the top of the box body, and the sealing ring is clamped between the box body and the box cover.

[0005] A better technical solution of the utility model is as follows: a sunken surface is provided on the top of the box body, the sunken surface is provided around the box body opening, and the sunken surface is close to the box body opening, a mounting groove is provided on the sunken surface, a sealing gasket is provided in the mounting groove, a boss is provided on the box cover, and when the box cover is provided on the box body, the sealing gasket is provided between the sunken surface and the boss.

[0006] A better technical solution of the utility model: a mounting seat protruding outward is arranged on the top of the box body, a plurality of the mounting seats are arranged along the circumference of the box body opening, a mounting hole is opened on the mounting seat, and the sealing ring is sleeved outside the mounting seat; relative to the box body opening, the sealing ring is located on the outside of the sealing gasket, and the sealing ring is located above the sealing gasket.

[0007] A more preferred technical solution of the utility model: it also includes a flow guiding structure connected to the liquid inlet, the flow guiding structure is provided with a plurality of flow guiding ports, and the flow guiding ports are connected to the box body.

[0008] A more optimal technical solution of the utility model: it also includes a confluence structure together with the liquid outlet, and the confluence structure is provided with a plurality of confluence ports, and the confluence ports are communicated with the box body.

[0009] A better technical solution of the utility model is as follows: the box body is provided with a first cavity and a second cavity, the battery module is provided in the first cavity, the second cavity is provided with a BMS, and the BMS is used to monitor the temperature of the battery module.

[0010] A more optimal technical solution of the utility model is that a balancing valve is arranged on the box cover.

[0011] The utility model has the following beneficial effects:

[0012] 1. The cooling medium enters from the bottom and exits from the top, and multiple flow channels are formed through the guide structure, so that the cooling contact is fully in contact with the battery module, realizing efficient heat exchange of the battery module;

[0013] 2. The double-layer sealing structure of sealing ring combined with sealing ring is adopted to improve the sealing reliability of the box;

[0014] 3. A partition plate is provided between the battery modules, and multiple immersion channels in the partition plate provide flow channels for the cooling medium to improve the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the utility model and are used together with the description to explain the principles of the utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural view of an embodiment of the utility model.

[0017] Figure 2 This is a top view of the embodiment of the utility model after removing the box cover.

[0018] Figure 3 For the utility model embodiment Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 This is a cross-sectional view of an embodiment of the utility model.

[0020] Figure 5 For the utility model embodiment Figure 4 Enlarged view of point B in the middle.

[0021] Figure 6 It is a side view of the middle partition of the utility model.

[0022] Figure 7 It is a side view of another embodiment of the middle partition of the utility model.

[0023] Figure 8 It is a side view of another embodiment of the middle partition of the utility model.

[0024] In the figure: 10, box cover; 11, boss; 12, balancing valve; 13, bolt; 20, box body; 201, liquid inlet; 202, liquid outlet; 21, mounting seat; 211, sealing ring; 22, sunken surface; 221, mounting groove; 222, sealing gasket; 23, mounting hole; 30, battery module; 40, diversion structure; 41, diversion port; 50, confluence structure; 51, confluence port; 60, partition plate; 61, immersion channel; 70, BMS. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0026] See also Figures 1 to 6 An immersion battery system includes a box body 20, a box cover 10, and a battery module 30. A plurality of battery modules 30 are arranged at intervals at the bottom of the box body 20. A liquid inlet 201 and a liquid outlet 202 are arranged on the side wall of the box body 20. The liquid inlet 201 and the liquid outlet 202 are both connected to the inside of the box body 20. A cooling medium flows into the box body 20 from the liquid inlet 201, contacts the battery module 30, and flows out from the liquid outlet 202 driven by an external pump device to achieve battery heat exchange.

[0027] The heat dissipation principle of the present application is to inject a cooling medium into the box body 20 so that the cooling medium immerses the battery module 30 and the cooling medium is in full contact with the battery module 30. A liquid inlet 201 and a liquid outlet 202 are provided to allow the cooling medium to flow in the box body 20. The cooling medium flows away the heat generated by the battery module 30 and exchanges heat with the battery module 30, thereby realizing heat exchange of the battery module 30.

[0028] The liquid inlet 201 and the liquid outlet 202 are arranged on two opposite side walls of the box body 20 along the diagonal of the box body 20, and the height of the liquid inlet 201 is lower than the height of the liquid outlet 202. The height difference between the liquid inlet 201 and the liquid outlet 202 allows the cooling medium to be stored in the box body 20. The cooling medium surface gradually rises with the injection of the cooling medium and immerses the battery module 30, thereby increasing the contact area between the cooling medium and the battery module 30 and improving the heat exchange efficiency of the battery module 30.

[0029] See also Figure 1 and Figure 3 , near the liquid inlet 201, a guide structure 40 is arranged on the side wall of the box body 20. The guide structure 40 is tubular, and a guide port 41 is arranged on its circumferential surface. A plurality of guide ports 41 are arranged at intervals along the length direction of the guide structure 40. One end of the guide structure 40 is connected with the liquid inlet 201. The cooling medium enters the guide structure 40 through the liquid inlet 201, and is dispersed through the guide port 41 and flows to various places inside the box body 20, so that the multiple battery modules 30 in the box body 20 are evenly cooled.

[0030] Near the liquid outlet 202, a confluence structure 50 is provided on the side wall of the box body 20. The confluence structure 50 is tubular, and a confluence port 51 is provided on its circumferential surface. A plurality of confluence ports 51 are arranged at intervals along the length direction of the confluence structure 50. One end of the confluence structure 50 is connected to the liquid outlet 202. The cooling medium that immerses the battery module 30 enters the confluence structure 50 through the confluence port 51 and is uniformly discharged through the liquid outlet 202. In this embodiment, the flow guide structure 40 and the confluence structure 50 have the same size and shape.

[0031] Preferably, the guide port 41 and the confluence port 51 are arranged corresponding to the gap between the two battery modules 30, so that the guide port 41 corresponds to the confluence port 51 one by one, and the line connecting the guide port 41 and the corresponding confluence port 51 is a straight line. The coolant can enter the confluence structure 50 through the nearest confluence port 51 and be discharged, so as to reduce the flow path of the cooling medium, so that the cooling medium after heat exchange can be quickly discharged, thereby increasing the thermal circulation rate of the cooling medium, thereby achieving rapid cooling of the battery module 30.

[0032] A spacer 60 is provided between two adjacent battery modules 30, and an immersion channel 61 is provided in the spacer 60, and a plurality of immersion channels 61 are arranged in a single direction. Preferably, the length of the spacer 60 is the same as the length of the battery module, and the immersion channel 61 provides a flow channel for the cooling medium and guides the flow of the cooling medium. The cooling medium flows in the gap between the two battery modules 30 through the immersion channel 61, and the flow of the cooling medium takes away the heat generated by the battery module 30, realizing heat exchange, and then dissipating the heat of the battery module 30. It should be noted that Figures 6 to 8Only three embodiments of the structure of the spacer plate 60 are shown in FIG. 1 . The immersion channel 61 may have different shapes, and the shape of the spacer plate 60 does not affect the effect of the spacer plate 60 .

[0033] A first cavity and a second cavity are provided in the box body 20, and the first cavity and the second cavity are independent of each other. The battery module 30 is provided in the first cavity, and a BMS70 is provided in the second box body 20. The BMS70 is used to monitor the temperature of the battery module 30 in the first cavity. The BMS70 is electrically connected to an external pump device, and controls the flow of cooling medium by controlling the pump device to dissipate heat for the battery module 30, thereby controlling the battery module 30 to be at a suitable operating temperature for a long time.

[0034] The box body 20 and the box cover 10 are fixedly connected by bolts 13. Specifically, a mounting seat 21 is provided on the top of the box body 20. The mounting seat 21 protrudes from the top of the box body 20. A mounting hole 23 is provided in the middle of the mounting seat 21. The mounting hole 23 is a threaded hole. The bolt 13 is arranged in the mounting hole 23 to connect the box body 20 to the box cover 10. The mounting seat 21 is cylindrical. A plurality of mounting seats 21 are arranged at intervals around the opening of the box body 20. The sealing ring 211 is sleeved on the mounting seat 21. When the box body 20 is connected to the box cover 10, the sealing ring 211 is squeezed by the box body 20 and the box cover 10 to achieve sealing of the box body 20.

[0035] Further, a sinking surface 22 is provided on the top of the box body 20. The sinking surface 22 is provided around the opening of the box body 20, and the sinking surface 22 is close to the opening of the box body 20. A mounting groove 221 is provided on the sinking surface 22. The mounting groove 221 is provided in a ring shape around the opening of the box body 20, and a sealing gasket 222 is provided in the mounting groove 221. A boss 11 is provided on the box cover 10. The boss 11 is provided corresponding to the sinking surface 22. When the box body 20 is connected to the box cover 10, the boss 11 is opposite to the sinking surface 22, and the sealing gasket 222 is pressed into the mounting groove 221. The sinking surface 22 is close to the opening of the box body 20 relative to the mounting seat 21, and the sinking surface 22 is located below the mounting seat 21, so that in the vertical direction of the box body 20 and in the horizontal plane, the sealing gasket 222 and the sealing ring 211 form a double sealing protection at the connection between the box body 20 and the box cover 10, so as to improve the sealing performance of the box body 20 and avoid leakage of the cooling medium. Figure 5 shown.

[0036] Furthermore, a balancing valve 12 is provided on the box cover 10 to balance the internal air pressure of the sealed box body 20 .

[0037] The present application utilizes a cooling medium, and by immersing the battery module 30, the cooling medium flows to take away the heat of the battery module 30, thereby achieving heat exchange and further dissipating heat from the battery module 30. Since the cooling medium is in direct contact with the battery module 30, the cooling medium should have the characteristics of non-conductivity and high thermal conductivity. For example, in this embodiment, the cooling medium is CXCH-105 hydrocarbon liquid coolant, or FUCHS BluEV TF8004.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An immersion battery system, characterized in that: The invention comprises a box body (20), a battery module (30), and a box cover (10), wherein a plurality of the battery modules (30) are arranged at intervals at the bottom of the box body (20), a liquid inlet (201) and a liquid outlet (202) are arranged on a side wall of the box body (20), the liquid inlet (201) and the liquid outlet (202) are arranged on a diagonal line of the box body (20), the height of the liquid inlet (201) is lower than the height of the liquid outlet (202), and a cooling medium enters the box body (20) through the liquid inlet (201) and gradually immerses the cooling medium. The battery modules (30) are arranged in a uniformly spaced manner, and the cooling medium flows through the immersion channels (61). A sealing ring (211) is provided on the top of the box body (20), and the sealing ring (211) is sandwiched between the box body (20) and the box cover (10).

2. The submerged battery system according to claim 1, characterized in that: The top of the box body (20) is provided with a sunken surface (22), the sunken surface (22) is provided around the opening of the box body (20), and the sunken surface (22) is close to the opening of the box body (20), the sunken surface (22) is provided with a mounting groove (221), a sealing gasket (222) is provided in the mounting groove (221), and the box cover (10) is provided with a boss (11), and when the box cover (10) is covered on the box body (20), the sealing gasket (222) is provided between the sunken surface (22) and the boss (11).

3. The submerged battery system according to claim 2, characterized in that: A mounting seat (21) protruding outward is arranged on the top of the box body (20); a plurality of the mounting seats (21) are arranged along the circumference of the opening of the box body (20); a mounting hole (23) is opened on the mounting seat (21); the sealing ring (211) is sleeved outside the mounting seat (21); relative to the opening of the box body (20), the sealing ring (211) is located outside the sealing gasket (222); and the sealing ring (211) is located above the sealing gasket (222).

4. The submerged battery system according to claim 1, characterized in that: It also comprises a flow guiding structure (40) connected to the liquid inlet (201), wherein the flow guiding structure (40) is provided with a plurality of flow guiding ports (41), and the flow guiding ports (41) are connected to the box body (20).

5. The submerged battery system according to claim 1, characterized in that: It also comprises a confluence structure (50) together with the liquid outlet (202), wherein the confluence structure (50) is provided with a plurality of confluence ports (51), and the confluence ports (51) are in communication with the box body (20).

6. The submerged battery system according to claim 1, characterized in that: A first cavity and a second cavity are provided in the box (20); the battery module (30) is provided in the first cavity; a BMS (70) is provided in the second cavity; the BMS (70) is used to monitor the temperature of the battery module (30).

7. The submerged battery system according to claim 1, characterized in that: A balancing valve (12) is provided on the box cover (10).

8. The submerged battery system according to claim 1, characterized in that: The partition plate (60) extends along the battery module (30), and an outer wall of the partition plate (60) contacts the battery module (30).

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