Immersed battery box

Abstract

The utility model provides an immersed battery box which comprises a box body, a three-way valve, a water tank and an anti-explosion valve, a containing cavity is formed in the box body, and an input hole is formed in the box body; one end of the three-way valve is communicated with the box body, one end is communicated with the water tank, and the other end is a free end; and the anti-explosion valve is arranged on the water tank. The insulating cooling medium only has a thermal interaction process with the internal components, and the insulating cooling medium completes heat dissipation outside the box body and then enters the box body, so that the heat dissipation efficiency is effectively improved; meanwhile, the three-way valve is arranged and can control circulation of an insulating cooling medium, when thermal runaway occurs in the box body, the three-way valve switches a passage, so that gas, liquid and other contents generated by thermal runaway in the box body enter the water tank through the three-way valve, leakage of the high-temperature contents can be avoided, and the anti-explosion valve can be opened after the pressure reaches a threshold value; therefore, explosion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to a submerged battery box. Background Technique

[0002] A submerged battery pack completely encapsulates battery chips in electrolyte, achieving system-level encapsulation of the battery. It adopts a structure in which electrode chips are coated with electrolyte, and two terminals of the electrode chips are exposed outside the battery pack, while the inside is infiltrated with electrolyte, forming a "submerged" structure.

[0003] In the structure for battery heat dissipation, there is also a submerged heat dissipation structure, that is, an insulating cooling medium is used to completely submerge the battery module to fully contact the battery, thereby achieving a good heat dissipation and cooling effect.

[0004] The existing invention patent application with the publication number CN114614148A discloses a submerged battery pack thermal management system, including: a sealed heat dissipation reaction housing, a cooling medium, a plate heat exchanger, and at least one battery component; a sealed heat dissipation reaction pool is arranged inside the sealed heat dissipation reaction housing; the battery component is arranged in the heat dissipation reaction pool, the plate heat exchanger is arranged on the top of the heat dissipation reaction pool, and the cooling medium is arranged in the heat dissipation reaction pool and submerges the battery component; the cooling medium is used to absorb the heat of the battery component to cool the battery component; the plate heat exchanger is used to condense the cooling medium after absorbing the heat of the battery component.

[0005] In the above technical solution, a sealed heat dissipation reaction pool is set to accommodate the cooling medium to cool the battery component. However, in this structure, the plate heat exchanger is used to cool the cooling medium. During the cooling process, there is a heat interaction process between the battery and the cooling medium and between the cooling medium and the plate heat exchanger, resulting in low heat dissipation efficiency during application. At the same time, since it is a sealed structure, when the battery is thermally out of control, a good pressure relief and explosion-proof function cannot be achieved. Content of the Utility Model

[0006] In view of this, the utility model provides a submerged battery box with high heat dissipation efficiency and good pressure relief and explosion-proof functions to solve the problems of low heat dissipation efficiency and poor pressure relief and explosion-proof functions existing in the existing battery pack structure.

[0007] The technical solution of the utility model is realized as follows: The utility model provides a submerged battery box, including a box body, a three-way valve, a water tank, and an explosion-proof valve, where,

[0008] The box body has an accommodation cavity inside, and the box body is provided with an input hole;

[0009] One end of the three-way valve communicates with the box body, one end communicates with the water tank, and the other end is a free end;

[0010] The explosion-proof valve is arranged on the water tank.

[0011] On the basis of the above technical solutions, preferably, part of the box wall of the box body is composed of liquid cooling plates;

[0012] There are at least two liquid cooling plates, and both of the two liquid cooling plates communicate with the box body;

[0013] One of the liquid cooling plates is provided with a water outlet, and the water outlet communicates with one end of the three-way valve;

[0014] The other liquid cooling plate is provided with a water inlet, and the water inlet is the input hole of the box body;

[0015] Both the water inlet and the free end of the three-way valve are connected to the circulating unit.

[0016] On the basis of the above technical solutions, preferably, the two liquid cooling plates are arranged opposite to each other.

[0017] On the basis of the above technical solutions, preferably, a first communication hole is formed on the surface of the liquid cooling plate facing the inside of the box body to penetrate the accommodating cavity.

[0018] On the basis of the above technical solutions, preferably, a cross beam is arranged on the surface of the liquid cooling plate facing the inside of the box body. The cross beam and the liquid cooling plate are of an integral structure, and the first communication hole is formed on the cross beam.

[0019] On the basis of the above technical solutions, preferably, a longitudinal beam is arranged on the surface of the liquid cooling plate facing the inside of the box body. One end of the cross beam abuts against the longitudinal beam to form a first accommodating area and a second accommodating area on the liquid cooling plate.

[0020] On the basis of the above technical solutions, preferably, a battery module and a power management module are arranged in the box body. Among them,

[0021] The battery module is arranged in the first accommodating area;

[0022] The power management module is arranged in the second accommodating area.

[0023] On the basis of the above technical solutions, preferably, the liquid cooling plate is provided with a second communication hole corresponding to the second accommodating area.

[0024] On the basis of the above technical solutions, preferably, a plurality of partition plates are arranged inside the liquid cooling plate to form a plurality of parallel flow channels inside the liquid cooling plate, and the ends of the plurality of flow channels communicate with each other;

[0025] The first communication hole communicates with the flow channel corresponding to the cross beam;

[0026] The second communication hole is provided corresponding to all the flow channels.

[0027] On the basis of the above technical solutions, preferably, the circulation unit is used to supply insulating coolant into the box body and recover and cool it to achieve circulation;

[0028] A radiator is connected in series with the circulation path of the box body and the circulation unit.

[0029] The immersion battery box of the present utility model has the following beneficial effects compared with the prior art:

[0030] (1) By providing an input hole in the box body, insulating cooling medium can be input into the box body. After that, the insulating cooling medium exchanges heat with the internal components of the box body and is discharged from the free end of the three-way valve. In this way, the insulating cooling medium only has a heat interaction process with the internal components. The insulating cooling medium can complete heat dissipation outside the box body and then enter the box body, which effectively improves the heat dissipation efficiency. At the same time, by providing a three-way valve, it can control the flow of the insulating cooling medium. When a thermal runaway occurs inside the box body, the three-way valve switches the path, so that the gas, liquid and other contents generated by the thermal runaway in the box body can enter the water tank through the three-way valve, which can avoid the leakage of high-temperature contents, and the explosion-proof valve can be opened when the pressure reaches the threshold to avoid explosion;

[0031] (2) Part of the box wall of the box body is composed of liquid cooling plates. The insulating cooling medium is input into the box body and output from the box body through the liquid cooling plates. In this way, the insulating cooling medium can not only take away the heat generated by the battery, but also take away the heat transferred to the liquid cooling plates, which effectively improves the heat dissipation efficiency;

[0032] (3) The liquid cooling plate is provided with a first communication hole corresponding to the battery module and a second communication hole corresponding to the power management module. Among them, the flow rate of the second communication hole is larger. In this way, the liquid cooling plate structure has a larger flow rate for the power management module with serious heat generation, which can ensure the temperature uniformity of the entire battery box and improve the heat dissipation effect. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a perspective view of the immersion battery box of the present utility model;

[0035] Figure 2 It is a side view of the immersion battery box of the present utility model;

[0036] Figure 3 For the present utility modelFigure 2 Cross-sectional view in the A-A direction;

[0037] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A;

[0038] Figure 5 For the present utility model Figure 2 Cross-sectional view in the B-B direction;

[0039] Figure 6 Structural diagram of the top liquid cooling plate of the immersion battery box of the present utility model;

[0040] Figure 7 Internal structural diagram of the immersion battery box of the present utility model;

[0041] In the figure: 1, box body; 101, accommodation cavity; 11, liquid cooling plate; 1101, water outlet; 1102, water inlet; 1103, first communication hole; 1104, first accommodation area; 1105, second accommodation area; 1106, second communication hole; 1107, flow channel; 12, cross beam; 13, longitudinal beam; 14, partition board; 2, three-way valve; 3, water tank; 4, explosion-proof valve. Specific implementation mode

[0042] Next, in combination with the implementation modes of the present utility model, the technical solutions in the implementation modes of the present utility model will be clearly and completely described. Obviously, the described implementation modes are only a part of the implementation modes of the present utility model, rather than all of the implementation modes. Based on the implementation modes in the present utility model, all other implementation modes obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0043] As Figures 1 to 7 shown, the immersion battery box of the present utility model includes a box body 1, a three-way valve 2, a water tank 3, and an explosion-proof valve 4.

[0044] As Figures 1 to 3 and Figure 6 shown, the box body 1 has an accommodation cavity 101 inside, and the box body 1 is provided with an input hole; one end of the three-way valve 2 communicates with the box body 1, one end communicates with the water tank 3, and the other end is a free end; the explosion-proof valve 4 is arranged on the water tank 3;

[0045] With the above structure, the box body 1 is used to install components such as battery modules and power management modules, and is used for the storage, release, and management of electric energy;

[0046] In this structure, the input hole of the box body 1 is used to supply the insulating cooling medium, and the free end of the three-way valve 2 is used to output the insulating cooling medium. After the insulating cooling medium flows through the inside of the box body 1 and exchanges heat with the internal components, the insulating cooling medium can be directly discharged through the free end of the three-way valve 2. In this way, the insulating cooling medium only has a heat interaction process with the internal components. The insulating cooling medium can complete heat dissipation outside the box body 1 and then enter the box body, which effectively improves the heat dissipation efficiency.

[0047] At the same time, by setting the three-way valve 2, it can control the flow of the insulating cooling medium. When thermal runaway occurs inside the box body 1, the three-way valve 2 switches the passage, so that the contents such as gas and liquid generated by thermal runaway in the box body 1 can enter the water tank 3 through the three-way valve 2, which can avoid the leakage of high-temperature contents, and the explosion-proof valve 4 can be opened when the pressure reaches the threshold value to relieve pressure and avoid explosion.

[0048] As Figure 2 shown, part of the box wall of the box body 1 is composed of a liquid cooling plate 11; at least two liquid cooling plates 11 are provided, and both liquid cooling plates 11 communicate with the box body 1; one of the liquid cooling plates 11 is provided with a water outlet 1101, and the water outlet 1101 communicates with one end of the three-way valve 2; the other liquid cooling plate 11 is provided with a water inlet 1102, and the water inlet 1102 is the input hole of the box body 1; both the water inlet 1102 and the free end of the three-way valve 2 are connected to the circulation unit.

[0049] In the battery box with the above structure, the insulating cooling medium does not directly enter the accommodating cavity 101 of the box body 1, but will first pass through the liquid cooling plate 11.

[0050] Specifically, when the insulating cooling medium enters the liquid cooling plate 11 through the water inlet 1102, it can first have a heat interaction with the liquid cooling plate 11, and when the insulating cooling medium passes through the inside of the box body 1, it exchanges heat with the internal components. Finally, the insulating cooling medium enters another liquid cooling plate 11 to achieve the third heat interaction, so that the heat inside the battery box and the heat transferred to the liquid cooling plate 11 can be taken away; the insulating cooling medium finally enters the three-way valve 2 through the water outlet 1101 and is discharged through the free end of the three-way valve 2.

[0051] Of course, at the same time, the liquid cooling plate 11 will also dissipate heat to further improve the heat dissipation efficiency.

[0052] Specifically, the circulation unit is used to supply the insulating coolant into the box body 1 and recover the insulating coolant for heat dissipation to achieve circulation.

[0053] During implementation, a radiator is connected in series with the circulation path of the box body 1 by the circulation unit to dissipate heat from the insulating coolant.

[0054] The circulating unit can be composed of a circulating pump and a water tank. The water tank is used to store the insulating cooling medium, and the circulating pump is used for the circulation of the insulating cooling medium; the radiator can adopt a gas-liquid heat exchanger to dissipate heat from the insulating cooling medium to ensure the miniaturization of the system.

[0055] Preferably, the two liquid cooling plates 11 are arranged oppositely, so as to improve the circulation efficiency of the insulating cooling medium and enhance the heat dissipation effect.

[0056] Such as Figures 3 to 6 As shown, a first communication hole 1103 is opened on the surface of the liquid cooling plate 11 facing the inside of the box body 1 to penetrate the accommodating cavity 101;

[0057] In the connection mode between the liquid cooling plate 11 and the box body 1 as described above, the structure of opening the first communication hole 1103 can be adopted;

[0058] In some embodiments, the first communication hole 1103 can be connected to a pipeline, and the other end of the pipeline is directed towards the component that needs to dissipate heat to achieve targeted heat dissipation.

[0059] Such as Figure 4 As shown, a cross beam 12 is arranged on the surface of the liquid cooling plate 11 facing the inside of the box body 1. The cross beam 12 and the liquid cooling plate 11 are of an integral structure, and the first communication hole 1103 is opened on the cross beam 12;

[0060] In the structure as described above, the cross beam 12 is used to divide the area of the liquid cooling plate 11. Specifically, the two liquid cooling plates 11 are arranged symmetrically up and down. The lower liquid cooling plate 11 is used to carry the internal components of the box body 1, and it is used to carry the battery to form a battery module;

[0061] When fixing the battery, there are multiple cross beams 12. Glue is applied between the cross beams 12 to bond the battery. The cross beam 12 can avoid the phenomenon of glue overflow, while ensuring the firm fixation of the battery and preventing the glue from blocking the first communication hole 1103.

[0062] Such as Figure 7 As shown, a longitudinal beam 13 is arranged on the surface of the liquid cooling plate 11 facing the inside of the box body 1. One end of the cross beam 12 abuts against the longitudinal beam 13 to form a first accommodating area 1104 and a second accommodating area 1105 on the liquid cooling plate 11;

[0063] In the structure as described above, a longitudinal beam 13 is also arranged on the liquid cooling plate 11. In this way, the liquid cooling plate 11 forms a first accommodating area 1104 and a second accommodating area 1105. The first accommodating area 1104 is used to place the battery to form a battery module, while the second accommodating area 1105 accommodates the components for battery management, thereby realizing area division.

[0064] Specifically, a battery module and a power management module are arranged in the box body 1. Among them, the battery module is arranged in the first accommodation area 1104; the power management module is arranged in the second accommodation area 1105.

[0065] As Figure 6 shown, the liquid cooling plate 11 is provided with a second communication hole 1106 corresponding to the second accommodation area 1105;

[0066] In the above structure, when heat dissipation is carried out, in the area corresponding to the first accommodation area 1104, a first communication hole 1103 is opened, while in the second accommodation area 1105, a second communication hole 1106 is correspondingly opened, so that both the battery module and the power management component have a direct current of insulating cooling medium, thus ensuring a good heat dissipation effect.

[0067] As Figure 5 shown, a plurality of partition plates 14 are arranged inside the liquid cooling plate 11 to form a plurality of parallel flow channels 1107 in the liquid cooling plate 11, and the ends of the plurality of flow channels 1107 communicate with each other; the first communication hole 1103 communicates with the flow channel 1107 corresponding to the cross beam 12; the second communication hole 1106 is provided corresponding to all the flow channels 1107;

[0068] In the above structure, the end area of the flow channel 1107 communicates with the water outlet 1101 or the water inlet 1102, so as to realize the confluence of the liquid cooling medium;

[0069] During heat dissipation, the relative heat of the battery module is lower. Therefore, the first communication hole 1103 only communicates with the flow channel 1107 corresponding to the cross beam 12, while the second communication hole 1106 is provided corresponding to all the flow channels 1107. In this way, the power management module for confluence management can be fully cooled, and the rapid increase of heat caused by current concentration can be avoided.

[0070] Specific implementation steps:

[0071] During cooling, the insulating cooling medium is sent into the bottom liquid cooling plate 11 by the circulating unit through the water inlet 1102, and is sent into the accommodation cavity 101 of the box body 1 through the first communication hole 1103 of the bottom liquid cooling plate 11. After the insulating cooling medium exchanges heat with the battery module and the power management component inside the box body 1, it will enter the upper liquid cooling plate 11 through the first communication hole 1103 of the upper liquid cooling plate 11, and then is output through the water outlet 1101 of the upper liquid cooling plate 11 and the three-way valve 2, and returns to the circulating unit, and is cooled by the radiator;

[0072] When the internal thermal runaway pressure of the box body 1 increases, the three-way valve 2 switches the through hole, its passage with the circulating unit is cut off, and the passage with the water tank 3 is opened. At this time, the internal medium of the box body 1 enters the water tank 3. As the pressure increases, the explosion-proof valve 4 opens for pressure relief, so as to avoid the leakage of substances generated by thermal runaway and achieve explosion protection.

[0073] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An immersion battery box, characterized in that: It comprises a box body (1), a three-way valve (2), a water tank (3) and an explosion-proof valve (4), wherein: The box body (1) has a containing cavity (101) inside, and the box body (1) is provided with an input hole; One end of the three-way valve (2) is connected to the box body (1), one end is connected to the water tank (3), and the other end is a free end; The explosion-proof valve (4) is arranged on the water tank (3).

2. The submerged battery box according to claim 1, characterized in that: Part of the box wall of the box body (1) is formed by a liquid cooling plate (11); At least two liquid cooling plates (11) are provided, and both of the two liquid cooling plates (11) are connected to the box body (1); One of the liquid cooling plates (11) is provided with a water outlet (1101), and the water outlet (1101) is connected to one end of the three-way valve (2); The other liquid cooling plate (11) is provided with a water inlet (1102), and the water inlet (1102) is an input hole of the box body (1); The water inlet (1102) and the free end of the three-way valve (2) are both connected to a circulation unit.

3. The submerged battery box according to claim 2, characterized in that: The two liquid cooling plates (11) are arranged opposite to each other.

4. The submerged battery box according to claim 2, characterized in that: A first communication hole (1103) is provided on a surface of the liquid cooling plate (11) facing the inside of the box body (1) so as to penetrate the accommodating cavity (101).

5. The submerged battery box according to claim 4, characterized in that: A crossbeam (12) is provided on one side of the liquid cooling plate (11) facing the inside of the box body (1); the crossbeam (12) and the liquid cooling plate (11) are an integrated structure, and the first connecting hole (1103) is provided on the crossbeam (12).

6. The submerged battery box according to claim 5, characterized in that: A longitudinal beam (13) is provided on one side of the liquid cooling plate (11) facing the inside of the box body (1), and one end of the cross beam (12) is abutted against the longitudinal beam (13) to form a first accommodating area (1104) and a second accommodating area (1105) on the liquid cooling plate (11).

7. The submerged battery box according to claim 6, characterized in that: The box (1) is provided with a battery module and a power management module, wherein: The battery module is arranged in the first accommodation area (1104); The power management module is arranged in the second accommodating area (1105).

8. The submerged battery box according to claim 7, characterized in that: The liquid cooling plate (11) is provided with a second communicating hole (1106) corresponding to the second accommodating area (1105).

9. The submerged battery box according to claim 8, characterized in that: A plurality of partitions (14) are arranged inside the liquid cooling plate (11) to form a plurality of parallel flow channels (1107) inside the liquid cooling plate (11), and the ends of the plurality of flow channels (1107) are interconnected; The first communication hole (1103) is connected to the flow channel (1107) corresponding to the crossbeam (12); The second connecting hole (1106) is provided corresponding to all the flow channels (1107).

10. The submerged battery box according to any one of claims 2 to 9, characterized in that: The circulation unit is used to supply insulating coolant into the box (1) and recover the coolant to achieve circulation; A radiator is connected in series between the circulation passage of the circulation unit and the box (1).

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