An immersion battery pack and cooling system

Abstract

The utility model provides a kind of immersion battery pack and cooling system belong to new energy battery field.The battery pack includes battery module and box, multiple flow channel plates are provided in the box, multiple flow channel plates are arranged at intervals, one end of flow channel plate is in abutment with the inner wall of box, and the other end is provided with electric core insulation sealing plate, battery module is arranged between two adjacent flow channel plates, one end of battery module is in abutment with the inner wall of box, and the other end is in abutment with electric core insulation sealing plate.A kind of immersion battery pack and cooling system provided by the utility model embodiment can solve the problem of large amount of immersion liquid and inconvenient installation in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, and in particular to an immersion battery pack and cooling system. Background Technology

[0002] With the rapid development of new energy batteries, the requirements for their safety performance are becoming increasingly stringent, and battery cooling is a crucial aspect of battery operation. Current battery pack cooling technologies typically include air cooling, indirect liquid cooling, and immersion liquid cooling. Air cooling uses air, resulting in lower cooling efficiency and susceptibility to environmental conditions. Indirect liquid cooling requires the cooling plate to be in close contact with the battery for effective cooling, which undoubtedly increases the weight and volume of the battery module. Immersion liquid cooling, on the other hand, typically involves the battery being completely submerged in the coolant, significantly reducing contact thermal resistance. This design provides the battery with a uniform and high-capacity heat transfer path, ensuring efficient cooling. Therefore, immersion liquid cooling technology is increasingly widely used in new energy battery packs.

[0003] In existing technologies, immersion liquid-cooled battery boxes typically use end plates to fix multiple battery cells. Usually, two end plates are arranged at intervals inside the battery pack, and the battery module assembled from the battery cells is suspended and placed between the two end plates. Then, immersion liquid is injected to complete the encapsulation.

[0004] Existing submersible battery packs use end plates to fix the battery modules, and these end plates themselves require fixing structures. Therefore, the end plates occupy internal space, resulting in a larger battery pack size. This also necessitates the injection of a large amount of submersible fluid, leading to fluid waste. Furthermore, since the end plates are fixed inside the battery pack before the battery modules are hoisted in, collisions are likely to occur when the modules are inserted between the end plates, making hoisting difficult and causing installation and operation inconvenience. Utility Model Content

[0005] This utility model provides an immersion battery pack and cooling system, which solves the problems of large immersion fluid consumption and inconvenient installation in the prior art. The technical solution is as follows:

[0006] In a first aspect, an immersion battery pack is characterized by comprising: a battery module and a housing.

[0007] The housing is provided with multiple flow channel plates, which are arranged at intervals. One end of each flow channel plate abuts against the inner wall of the housing, and the other end is provided with a cell insulation sealing plate. The battery module is disposed between two adjacent flow channel plates, with one end of the battery module abutting against the inner wall of the housing and the other end abutting against the cell insulation sealing plate.

[0008] Optionally, a water pump is installed inside the housing, and the flow channel plate has multiple circulation holes along its length, with the water pump communicating with the circulation holes.

[0009] Optionally, a temperature sensor is installed inside the housing, and the temperature sensor is signal-connected to the water pump.

[0010] Optionally, the outer wall of the box is provided with reinforcing ribs.

[0011] Secondly, a cooling system includes the aforementioned submersible battery pack, comprising a container, wherein the container is provided with a separated first cavity and a second cavity, wherein a plurality of the submersible battery packs are stacked in the first cavity, and a wind-cooled air conditioner is provided in the second cavity, the wind-cooled air conditioner being connected to the first cavity.

[0012] Optionally, a liquid storage tank is provided in the second cavity, and multiple spray pipes are provided in the box body. The liquid storage tank is connected to the spray pipes, and the multiple spray pipes are arranged in parallel and spaced apart above the battery module.

[0013] Optionally, the spray pipe is provided with spray holes, which are positioned toward the pressure relief valve of the battery module.

[0014] Optionally, a smoke sensor is installed inside the box, and the smoke sensor is signal-connected to the liquid storage tank.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0016] This utility model provides an immersion battery pack and cooling system. By using flow channel plates to fix both sides of the battery module, one end of the battery module is fixed by the inner wall of the housing, and the other end is fixed by a cell insulation sealing plate. This structure eliminates the need for end plates, using the inner wall of the housing and the cell insulation sealing plate to fix the battery module. Furthermore, the flow channel plates can subsequently serve as channels for circulating immersion liquid, giving them a multi-functional purpose and efficiently utilizing the internal space of the housing. This minimizes the internal space and reduces the amount of immersion liquid used. During installation, each battery module can be individually hoisted into the housing, using a layer-by-layer installation method with one flow channel plate per layer. Finally, the cell insulation sealing plate secures all battery modules from the end. This installation method is relatively simple to operate and effectively solves the problems of large immersion liquid usage and inconvenient installation in existing technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the cooling system provided in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the cooling system provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention;

[0021] Figure 4 This is a top view schematic diagram of the battery pack provided in an embodiment of this utility model.

[0022] In the diagram: 1001-Battery pack; 101-Temperature sensor; 102-Smoke sensor; 1-Battery module; 2-Box; 21-Reinforcing rib; 3-Flow channel plate; 31-Circulation hole; 4-Cell insulation sealing plate; 5-Water pump; 6-Container; 61-First cavity; 62-Second cavity; 7-Air-cooled air conditioner; 8-Liquid storage tank; 9-Spray pipe; 91-Spray hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the cooling system provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal structure of the cooling system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention; Figure 4 This is a top view schematic diagram of the battery pack provided in an embodiment of this utility model. Figures 1 to 4 The submersible battery pack shown includes: a battery module 1 and a housing 2. The housing 2 is provided with a plurality of flow channel plates 3, which are arranged at intervals. One end of the flow channel plate 3 abuts against the inner wall of the housing 2, and the other end is provided with a cell insulation sealing plate 4. The battery module 1 is disposed between two adjacent flow channel plates 3, with one end of the battery module 1 abutting against the inner wall of the housing 2 and the other end abutting against the cell insulation sealing plate 4.

[0025] For example, in this embodiment of the present invention, by setting the flow channel plate 3 to fix both sides of the battery module 1, fixing one end of the battery module 1 by the inner wall of the housing 2, and fixing the other end of the battery module 1 by the cell insulation sealing plate 4, the battery module 1 can be fixed inside the housing 2. By setting this structure, the end plate can be eliminated, and the battery module 1 can be fixed by the inner wall of the housing 2 and the cell insulation sealing plate 4. Furthermore, the flow channel plate 3 can be used as a channel for circulating immersion liquid, giving the flow channel plate 3 a multi-functional function and making efficient use of the space inside the housing 2. This can minimize the space inside the housing 2 and thus reduce the amount of immersion liquid used. When installing the battery module 1, each battery module 1 can also be hoisted and placed into the housing 2 individually, using a layer of flow channel plate 3 and a layer of battery module 1 for installation. Finally, the cell insulation sealing plate 4 is fixed to all battery modules 1 from the end. This installation method is relatively simple to operate and can effectively solve the problems of large immersion liquid usage and inconvenient installation in the prior art.

[0026] Optionally, a water pump 5 is installed inside the housing 2, and a plurality of circulation holes 31 are opened along the length of the flow channel plate 3, and the water pump 5 is connected to the circulation holes 31.

[0027] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, by setting up water pump 5, the immersion liquid inside the box 2 can be circulated by starting water pump 5, so that the temperature of the immersion liquid inside the box 2 can be balanced, which can prevent some cells from being damaged due to local overheating, thereby improving the stability of the battery pack.

[0028] Optionally, a temperature sensor 101 is installed inside the housing 2, and the temperature sensor 101 is connected to the water pump 5 via a signal.

[0029] Exemplary, in embodiments of this utility model, such as Figure 3 As shown, by setting temperature sensor 101, the temperature inside the housing 2 can be detected in real time, enabling the cooling system to form a graded response strategy. When the detected cell temperature is ≥25℃ and <29℃, the battery pack is cooled by immersion liquid, forming a static immersion system. When the detected cell temperature is ≥29℃ and <32℃, water pump 5 is activated to circulate, improving the heat exchange capacity between the immersion liquid and the cells. At this time, the immersion liquid in the battery pack forms a dynamic circulation, forming a dynamic immersion system. By setting this structure, different forms of cooling can be applied to the battery pack according to different conditions, thereby improving the cooling efficiency of this cooling system.

[0030] Optionally, the outer wall of the housing 2 is provided with reinforcing ribs 21.

[0031] Exemplary, in embodiments of this utility model, such as Figure 3As shown, the housing 2 has a square structure, and the reinforcing ribs 21 are horizontally arranged on the four side walls of the housing 2. By setting the reinforcing ribs 21, the structural strength of the battery pack can be improved on the one hand, and the surface area of ​​the housing 2 can be increased on the other hand. This allows the subsequent air-cooled air conditioner 7 to increase the heat exchange area between the battery pack and the air cooler when cooling the battery pack, thereby improving the heat exchange capacity and more efficient heat dissipation and cooling, thus further improving the cooling efficiency of this cooling system.

[0032] A cooling system includes the aforementioned submersible battery pack, comprising a container 6, wherein the container 6 is provided with a first cavity 61 and a second cavity 62 separated from each other, wherein a plurality of submersible battery packs are stacked in the first cavity 61, and a wind-cooled air conditioner 7 is provided in the second cavity 62, the wind-cooled air conditioner 7 being connected to the first cavity 61.

[0033] Exemplary, in embodiments of this utility model, such as Figure 2 As shown, battery pack 1001 is labeled 1001. The container 6 provides physical protection for its internal cooling system and battery pack 1001. By stacking multiple battery packs 1001 in series, the overall battery capacity of the container is increased. An additional cooling method is provided by the air-cooled air conditioner 7. The air-cooled air conditioner 7 is connected to the temperature sensor 101. When the cell temperature is ≥32℃, the water pump 5 and the external air-cooled air conditioner 7 are simultaneously activated to enhance the heat exchange between the immersion liquid and the outside of the battery pack. This forms a new first-level response strategy for the dynamic immersion and external air-cooling circulation system, further cooling the cells and improving the cooling efficiency of the cooling system.

[0034] Optionally, a liquid storage tank 8 is provided in the second cavity 62, and multiple spray pipes 9 are provided in the box body 2. The liquid storage tank 8 is connected to the spray pipes 9, and the multiple spray pipes 9 are arranged in parallel and spaced above the battery module 1.

[0035] Exemplary, in embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the liquid storage tank 8 can also be connected to the temperature sensor 101. When the temperature inside the battery pack becomes too high and out of control, the pressure relief valve of the battery cell starts to work. When the pressure relief valve opens, the immersion liquid inside the battery pack flows back into the battery cell. At this time, by setting up the liquid storage tank 8 and the spray pipe 9, the immersion liquid can continue to be poured into the battery pack, thereby further reducing the temperature inside the battery pack. This forms a new first-level response strategy of full dynamic immersion, external air cooling circulation system and spray system, thereby further cooling the battery cell and further improving the cooling efficiency of this cooling system.

[0036] Optionally, a spray hole 91 is provided on the spray pipe 9, and the spray hole 91 is set toward the pressure relief valve of the battery module 1.

[0037] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, the spray nozzles 911 are positioned toward the pressure relief valve of each battery cell, which serves two main functions: firstly, if the battery pack does not experience thermal runaway and the valve is not open, but the temperature is abnormally high, it can quickly cool down the battery and prevent false alarms; secondly, if thermal runaway occurs, the immersion liquid can be quickly injected into the battery cell with the valve open, rapidly cooling down the battery and effectively suppressing thermal runaway, thereby further improving the cooling efficiency of this cooling system.

[0038] Optionally, a smoke sensor 102 is installed inside the housing 2, and the smoke sensor 102 is connected to the liquid storage tank 8 via a signal connection.

[0039] Exemplary, in embodiments of this utility model, such as Figure 3 As shown, by setting up a smoke sensor 102, toxic gases inside the battery pack can be detected. An auxiliary temperature sensor 101 determines whether thermal runaway has occurred inside the battery pack. When toxic gases are detected, the water pump 5, the air-cooled air conditioner 7, and the liquid storage tank 8 are simultaneously activated to rapidly cool the inside of the battery pack. The smoke sensor 102 improves the safety of this cooling system.

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An immersion battery pack, characterized by, The battery module (1) and the box (2) are included. A plurality of flow channel plates (3) are arranged in the box (2), the plurality of flow channel plates (3) are arranged at intervals, one end of the flow channel plate (3) abuts against the inner wall of the box (2), the other end is provided with a cell insulation sealing plate (4), the battery module (1) is arranged between two adjacent flow channel plates (3), one end of the battery module (1) abuts against the inner wall of the box (2), and the other end abuts against the cell insulation sealing plate (4). A water pump (5) is arranged in the box (2), a plurality of circulating holes (31) are formed in the flow channel plate (3) along the length direction, and the water pump (5) is in communication with the circulating hole (31).

2. The submerged battery pack of claim 1, wherein, A temperature sensor (101) is arranged in the box (2), and the temperature sensor (101) is signal connected with the water pump (5).

3. The submerged battery pack of claim 2, wherein, A reinforcing rib (21) is arranged on the outer wall of the box (2).

4. The submerged battery pack of claim 1, wherein, The container (6) is included, the first cavity (61) and the second cavity (62) are arranged in the container (6), a plurality of immersion battery packs are arranged in the first cavity (61), the air-cooled air conditioner (7) is arranged in the second cavity (62), and the air-cooled air conditioner (7) is in communication with the first cavity (61).

5. A cooling system comprising a plurality of the immersion battery pack of any one of claims 1 to 4, characterized in that, A liquid storage tank (8) is arranged in the second cavity (62), a plurality of spray pipelines (9) are arranged in the box (2), the liquid storage tank (8) is in communication with the spray pipeline (9), and the plurality of spray pipelines (9) are arranged in parallel and at intervals above the battery module (1).

6. A cooling system according to claim 5, wherein, Spray holes (91) are formed in the spray pipeline (9), and the spray holes (91) are arranged towards the pressure relief valve of the battery module (1).

7. A cooling system according to claim 6, wherein A smoke sensor (102) is arranged in the box (2), and the smoke sensor (102) is signal connected with the liquid storage tank (8).

8. A cooling system according to claim 6, wherein, ​

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