Immersed energy storage unit box

Abstract

The utility model relates to the technical field of battery packs, and provides an immersed energy storage unit box which comprises a box body and a battery cell module, the battery cell module is arranged in an inner cavity of the outer box body, the battery box further comprises a fixing plate, a BMU is detachably fixed outside the box body through the fixing plate, and installation is more convenient and safer. The liquid cooling system comprises a spraying pipeline, a liquid inlet two-way stop valve and an outlet two-way stop valve, the liquid inlet two-way stop valve is connected with a liquid inlet of the spraying pipeline, the liquid inlet spraying pipeline uniformly sprays cooling liquid entering the inner cavity of the box body to the upper layer of the battery cell module, and the cooling liquid flows into a flow channel at the bottom of the inner cavity of the box body through a gap of the battery cell module; a liquid outlet is formed in a flow channel at the bottom of an inner cavity of the box body, the outlet two-way stop valve is connected with the liquid outlet of the box body, the two-way stop valve and an external pipeline are also connected with a pump, and the pump is used for providing negative pressure for discharging the cooling liquid out of the box body, increasing the speed of the cooling liquid flowing through the battery cell module and keeping the consistency of the temperature of the cooling liquid.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery packs, and particularly relates to an immersed energy storage unit box. BACKGROUND

[0002] The known immersed unit box flows liquid from above the battery cell module along the battery cell module interchannel to the bottom of the battery cell module through natural gravity. The temperature deviation of the battery cell module in the known immersed unit box is large, so that the temperature of the product is difficult to keep consistent.

[0003] On the other hand, the existing immersed unit box has the BMU installed inside the energy storage box and separated from the battery cell module by a sealed partition plate. When the BMU is installed and removed, the box structure needs to be opened, which leads to inconvenience in installation and removal, and there is also a risk of liquid leakage during the removal process. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide an immersed energy storage unit box, which improves the cooling efficiency, and at the same time, the BMU can be arranged outside the battery box, which is convenient for disassembly and installation and can also prevent liquid leakage during disassembly.

[0005] The application provides an immersed energy storage unit box, which comprises a box body and a battery cell module. The battery cell module is arranged in the inner cavity of the outer box body. The battery box further comprises a fixing plate, which is arranged on the front wall of the box body and protrudes outward. The BMU is detachably fixed outside the box body through the fixing plate. The liquid cooling system comprises a spraying pipeline, an inlet two-way stop valve and an outlet two-way stop valve. The spraying pipeline is located between the upper side of the battery cell module and the box cover. The inlet two-way stop valve is connected with the inlet of the spraying pipeline. The inlet spraying pipeline uniformly sprays the cooling liquid entering the inner cavity of the box to the upper layer of the battery cell module, and the cooling liquid flows into the flow channel at the bottom of the inner cavity of the box through the gap of the battery cell module. The flow channel at the bottom of the inner cavity of the box is provided with an outlet. The outlet two-way stop valve is connected with the outlet of the box. The two-way stop valve is further connected with a pump of an external pipeline, which is used to provide negative pressure to discharge the cooling liquid from the box.

[0006] In some embodiments, an explosion-proof valve is arranged on the box cover, and a liquid level detector is arranged on the upper side of the front wall. The liquid level detector is used to monitor the real-time dynamic balance of the liquid in the box.

[0007] In some embodiments, the spraying pipeline comprises at least two spraying pipes. The water inlets of the two spraying pipes are connected with each other. A plurality of spraying holes are uniformly arranged on the spraying pipeline.

[0008] In some embodiments, the gap of the battery cell module is further provided with a partition plate, and the partition plate is further provided with a flow guide groove, and the cooling liquid on the upper side of the battery cell module flows into the flow channel plate through the flow guide groove on the partition plate, and then flows into the flow channel at the bottom of the inner cavity of the box through the flow channel hole on the flow channel plate.

[0009] In some embodiments, the side of the battery cell module is further provided with a blocking foam, and the blocking foam comprises a front end blocking foam, a middle blocking foam and a side end blocking foam, and the shape of the blocking foam matches the gap of the side of the battery cell module.

[0010] In some embodiments, the outer side wall of the box is further provided with a reinforcing frame, and the outer bottom of the box is provided with a crossbeam, and the crossbeam is welded with the reinforcing frame.

[0011] In some embodiments, the sizes of the flow channel holes on the flow channel plate are different.

[0012] In some embodiments, the fixing plate comprises a horizontal support plate and an inclined mounting plate, the horizontal support plate is fixed on the front wall, the inclined mounting plate is fixed on the lower side of the horizontal support plate, the inclined mounting plate protrudes to the direction away from the box, and the lower side of the horizontal support plate and the rear side of the inclined mounting plate form a mounting space, and the BMU is fixed on the rear side of the inclined mounting plate.

[0013] The beneficial effects achieved by the present application are as follows: the fixing plate protruding outwardly is arranged on the front wall of the box for mounting the BMU, so that the mounting and dismounting of the BMU are more convenient, meanwhile, the BMU is arranged outside the box, so that the leakage of liquid during the dismounting process can be prevented; in addition, in the liquid cooling system, the pump unit is arranged on the water outlet pipeline to provide negative pressure, so that the circulation speed of the cooling liquid is accelerated, the temperature difference is reduced, the consistency of the cooling liquid is improved, and the cooling efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the internal structure of the submerged energy storage unit box provided by the present application;

[0015] Figure 2 is a schematic view of the local structure of the submerged energy storage unit box provided by the present application;

[0016] Figure 3 is a schematic view of the flow channel plate structure in the submerged energy storage unit box provided by the present application;

[0017] Figure 4 is a schematic view of the bottom structure of the submerged energy storage unit box provided by the present application;

[0018] Figure 5 is a schematic view of the spraying pipe structure of the submerged energy storage unit box provided by the present application;

[0019] Figure 6 is a spacer plate structure schematic diagram of the submerged energy storage unit box provided by the utility model;

[0020] Figure 7 is a sealing strip structure schematic diagram of the submerged energy storage unit box provided by the utility model;

[0021] Figure 8 is a fixed plate structure schematic diagram of the submerged energy storage unit box provided by the utility model;

[0022] Figure 9 is a mounting rear view of the BMU of the submerged energy storage unit box provided by the utility model;

[0023] Figure 10 is a mounting side view of the BMU of the submerged energy storage unit box provided by the utility model;

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise.

[0025] The reference signs are explained as follows: 1-box body, 11-box cover, 12-front wall, 13-electricity core module fixed beam, 14-strengthening frame, 15-horizontal rib, 16-lifting hole, 2-electricity core module, 21-spacer plate, 22-liquid guide groove, 3-spraying pipeline, 31-spraying hole, 4-liquid inlet two-way stop valve, 5-outlet two-way stop valve, 6-flow channel plate, 61-flow channel hole, 7-liquid level detector, 8-explosion-proof valve, 9-fixed plate, 91-horizontal support plate, 92-inclined mounting plate, 100-BMU, 101-front end blocking foam, 102-middle blocking foam, 103-side end blocking foam. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the above-mentioned purposes, features and advantages of the utility model, the following will describe the utility model in detail in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, a lot of specific details are set forth in order to fully understand the utility model, and the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0029] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. One of ordinary skill in the art will readily recognize from the disclosure herein a wide number of variations, alternatives, and equivalents in the art.

[0030] An immersed energy storage unit box, comprising a box body 1, an electric cell module 2 and a liquid cooling system, as shown in Figure 1 The electric cell module 2 is arranged in the inner cavity of the outer box body 1, and the liquid cooling system comprises a spraying pipeline 3, an inlet two-way stop valve 4 and an outlet two-way stop valve 5. The spraying pipeline 3 is located between the upper side of the electric cell module 2 and the box cover 11. The inlet two-way stop valve 4 is connected with the inlet of the spraying pipeline 3. The inlet spraying pipeline uniformly sprays the cooling liquid entering the inner cavity of the box body 1 to the upper layer of the electric cell module 2, and then flows into the flow channel at the bottom of the inner cavity of the box body 1 through the gaps of the electric cell module 2. The outlet two-way stop valve 5 is connected with the outlet of the inner cavity of the box body 1. The two-way stop valve is further connected with an external pipeline and a pump. The pump is used to provide negative pressure to discharge the cooling liquid from the box body 1. Compared with the traditional immersed unit box, the liquid is flowed from the upper side of the electric cell module 2 to the bottom of the electric cell module 2 through the gaps between the electric cell modules 2 by natural gravity. The negative pressure is provided by the pump unit to accelerate the circulation speed of the cooling liquid, reduce the temperature difference, improve the consistency of the cooling liquid, and thus improve the cooling efficiency.

[0031] In the present embodiment, as Figure 2As shown, the box cover 11 is provided with an explosion-proof valve 8, and the liquid level detector 7 is arranged on the upper side of the front wall 12, preferably, the liquid level detector 7 is arranged on the upper side of the inlet liquid two-way stop valve 4. The liquid level detector 7 is used to monitor the real-time dynamic balance of the liquid in the box 1, and ensure that the liquid immersion position is kept at the height of the pole of the battery cell module 2. If the liquid level is too low, it may cause the battery to be insufficiently cooled, thereby affecting its performance and service life; if the liquid level is too high, it may cause safety hazards such as leakage, therefore, through the accurate monitoring of the liquid level detector 7, potential problems can be found and handled in time, and the normal operation of the energy storage system is ensured. In some embodiments, the liquid level detector 7 can also be combined with an automatic control system to realize automatic replenishment and discharge of the liquid. The explosion-proof valve 8 as a passive safety protection measure of the battery system can timely and directionally discharge gas when the battery is out of control, maintain pressure balance, and prevent explosion caused by excessive internal pressure of the battery.

[0032] In this embodiment, the spray pipeline 3 includes at least two spray pipes, as shown in Figure 5 The water inlets of the spray pipes are connected to each other, and a plurality of spray holes 31 are uniformly arranged on the spray pipeline 3, and the opening direction of the spray holes 31 is towards the battery cell module, so that the liquid can be uniformly sprayed onto the upper surface of the battery cell module 2.

[0033] In this embodiment, the gap of the battery cell module is also provided with a spacing plate 21, as shown in Figure 6 The spacing plate 21 is also provided with a longitudinal liquid guide groove 22, and the cooling liquid on the upper side of the battery cell module 2 flows into the flow channel plate 6 below through the liquid guide groove 22 on the spacing plate 21. The liquid guide groove 22 is a straight groove and is uniformly arranged on the surface of the spacing plate 21, so that the cooling liquid on the upper side can uniformly flow between the battery cell modules, thereby achieving the technical effect of uniform heat dissipation and avoiding the local overheating of the battery cell module.

[0034] In some embodiments, the liquid guide groove 22 is in a curved shape, and a plurality of curved liquid guide grooves 22 are uniformly arranged to increase the contact area of the cooling liquid and thereby improve the cooling efficiency.

[0035] In this embodiment, as shown in Figure 3 The flow channel plate 6 is provided with a plurality of flow channel holes. In some embodiments, the flow channel holes are of uniform size and are uniformly distributed on the flow channel plate 6, so that the cooling liquid can uniformly flow into the flow channel below. In some embodiments, the sizes of the flow channel holes can also be different, and preferably, the sizes of the flow channel holes gradually increase from the water outlet side of the battery box to the opposite side. In this way, the cooling liquid has a corresponding flow trend on the flow channel plate 6, i.e. flows from the water outlet side to the opposite side, and then flows into the flow channel below from the larger flow channel hole. The cooling liquid in the flow channel has an opposite flow trend at the same time, i.e. flows from the water outlet opposite side to the water outlet, thereby ensuring the temperature stability of the cooling liquid.

[0036] In some other embodiments, the flow channel plate 6 is also provided with guide ribs to guide the flow of coolant. The guide ribs can be any of the following: arc-shaped, straight, or wavy.

[0037] Two cell module fixing beams 13 are also welded onto the flow channel plate 6, which can increase the lateral structural strength of the flow channel plate 6 and also serve to fix and support the cell module 2.

[0038] In this embodiment, sealing foam is used on the sides of the battery cell module 2 to prevent liquid from flowing down from the sides of the battery cell module 2. The sealing foam is pre-cut into a specific shape according to the shape of the installation structure, such as... Figure 7 As shown, the sealing foam includes a front sealing foam 101, a middle sealing foam 102, and a side sealing foam 103, which can achieve sufficient sealing while saving installation time and reducing installation errors.

[0039] In this embodiment, the front wall 12 of the housing 1 is designed with a protruding fixing plate 9 for mounting the BMU, such as... Figure 8 As shown, the fixing plate 9 includes a horizontal support plate 91 and an inclined mounting plate 92. The horizontal support plate 91 is fixed to the front wall 12, and both sides of the horizontal support plate 91 are provided with downwardly bent edges. The inclined mounting plate 92 is fixed to the horizontal support plate 91, and the inclined mounting plate 92 protrudes inclinedly away from the housing 1. The lower side of the horizontal support plate 91 and the rear side of the inclined mounting plate 92 form an installation space. The BMU100 is fixed to the rear side of the inclined mounting plate 92 by bolts and accommodated in the rear installation space, as shown. Figures 9-10 As shown. The BMU100 is mounted on the outside of the enclosure by a protruding fixing plate 9, which makes the installation and removal of the BMU100 more convenient and also prevents liquid leakage during the disassembly process.

[0040] In this embodiment, a reinforcing member is also provided on the outer wall of the housing 1, such as... Figure 4 As shown, the enclosure includes at least four horizontal ribs 15 disposed on the bottom wall of the enclosure 1, and a reinforcing frame 14 disposed on the side wall of the enclosure 1 and welded to the horizontal ribs 15. The horizontal ribs 15 are evenly spaced on the bottom wall of the enclosure 1, providing good structural support and protection for the bottom of the enclosure 1 in the lateral direction. The reinforcing frame 14 is a wedge-shaped profile structure, providing structural support and protection for the bottom of the enclosure 1 in the longitudinal direction. The reinforcing frame 14 is also provided with four lifting holes 16, which also serve to provide structural protection for the entire submerged energy storage unit enclosure during lifting.

[0041] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application have been set forth by applying specific examples in this paper, the above embodiment is only used for helping understanding the method of the application and its core idea.

[0042] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in any aspect, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. The plurality of units or devices stated in the system claims can also be realized by one unit or device through software or hardware. The words of first, second, etc. are used to indicate names, and do not indicate any particular order.

[0043] At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation mode and application range, and in view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An immersed energy storage unit box, comprising a box body and an electric core module, the electric core module being arranged in the inner cavity of the outer box body, characterized in that, the battery box further comprises a fixing plate, which is arranged on the front wall of the box body and protrudes outward, and the BMU is detachably fixed to the outside of the box body through the fixing plate; a liquid cooling system, which comprises a spraying pipeline, an inlet two-way stop valve and an outlet two-way stop valve, the spraying pipeline being located between the upper side of the electric core module and the box cover, the inlet two-way stop valve being connected with the inlet of the spraying pipeline, the inlet spraying pipeline uniformly spraying the cooling liquid entering the inner cavity of the box to the upper layer of the electric core module and flowing into the flow channel at the bottom of the inner cavity of the box through the gaps of the electric core module, the flow channel at the bottom of the inner cavity of the box being provided with an outlet, the outlet two-way stop valve being connected with the outlet of the box, and a pump being further arranged between the two-way stop valve and the external pipeline to provide negative pressure for discharging the cooling liquid from the box.

2. The submerged energy storage cell tank of claim 1, wherein, An explosion-proof valve is arranged on the box cover, and a liquid level detector is arranged on the upper side of the front wall, the liquid level detector being used for monitoring the real-time dynamic balance of the liquid in the box.

3. The submerged energy storage cell tank of claim 1, wherein, The spraying pipeline comprises at least two spraying pipes, the water inlets of the two spraying pipes being connected with each other, and a plurality of spraying holes being uniformly arranged on the spraying pipeline.

4. The submerged energy storage cell tank of claim 1, wherein, The gaps of the electric core module are further provided with a spacing plate, the spacing plate being further provided with a flow guide groove, and the cooling liquid on the upper side of the electric core module flows into the flow channel plate through the flow guide groove on the spacing plate and then enters the flow channel at the bottom of the inner cavity of the box through the flow channel holes on the flow channel plate.

5. The submerged energy storage cell tank of claim 1, wherein, The side surface of the electric core module is further provided with a blocking foam, the blocking foam comprising front end blocking foam, middle blocking foam and side end blocking foam, and the shape of the blocking foam being matched with the gaps of the side surface of the electric core module.

6. The submerged energy storage cell tank of claim 1, wherein, A reinforcing frame is further arranged on the outer side wall of the box, and a cross beam is arranged at the bottom of the box, the cross beam being welded with the reinforcing frame.

7. The submerged energy storage cell tank of claim 4, wherein, The flow channel holes on the flow channel plate are different in size.

8. The submerged energy storage cell tank of claim 1, wherein, The fixing plate comprises a horizontal support plate and an inclined mounting plate, the horizontal support plate being fixed on the front wall, the inclined mounting plate being fixed on the lower side of the horizontal support plate, the inclined mounting plate protruding and inclining to the side away from the box, an installation space being formed between the lower side of the horizontal support plate and the rear side of the inclined mounting plate, and the BMU being fixed on the rear side of the inclined mounting plate.

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