Immersed battery pack

Abstract

The utility model discloses an immersed battery pack, which is mainly provided with liquid discharge parts positioned on different sides of a liquid supply part, and energy storage parts are arranged between the liquid supply part and the liquid discharge parts, so that the energy storage parts are distributed dispersedly, the flowing path of cooling liquid from the liquid supply part to the liquid discharge parts is shortened, the number of the energy storage parts needing to be cooled in the flowing process of the cooling liquid is reduced, and the cooling efficiency is improved. And the temperature difference of the cooling liquid at the liquid supply part and the liquid discharge part is reduced. The main technical scheme of the utility model is as follows: the immersed battery pack comprises a shell which comprises an accommodating cavity; the liquid supply part is provided with at least one water supply port, and the liquid supply part is communicated with the containing cavity through the water supply port; at least one water drainage opening is formed in each liquid drainage part, the liquid drainage parts communicate with the containing cavity through the water drainage openings, and the liquid drainage parts are located on the different sides of the liquid supply part; and the energy storage parts are located in the containing cavity, and the energy storage parts are arranged between the liquid supply part and the liquid drainage part. The device is mainly used for storing and supplying power.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an immersion battery pack. Background Art

[0002] With the continuous development of energy storage technology, battery packs are increasingly used in the field of power generation and supply. They can cope with power outages and realize energy storage, which is the key to achieving the dual carbon goals. The battery pack is composed of multiple lithium batteries connected in series and parallel. However, the charging and discharging efficiency, capacity, safety and life of lithium batteries are greatly affected by temperature. Too high or too low temperature or large temperature difference between battery packs will directly affect its performance. Therefore, it is necessary to operate the battery pack at a suitable temperature so that the performance of the battery can be fully utilized.

[0003] Existing methods for stabilizing the temperature of battery packs include cold plate liquid cooling methods, in which the battery contacts the liquid cold plate for temperature regulation. However, the heat exchange area between the battery and the liquid cold plate is limited, and it is difficult to directly cool high-heat generating parts such as the battery tabs, resulting in high battery tab temperatures and poor overall temperature uniformity of the battery. In addition, there is a risk of leakage in the liquid cold plate, and leakage will pose a huge safety hazard to the battery. In the prior art, there is also an immersion cooling method to dissipate heat from the battery, which can solve the problem of overall cooling of a single battery by immersing the battery in a completely insulating liquid. However, immersion cooling usually involves liquid supply from one side of the battery as a whole and liquid recovery on the other side, resulting in better cooling of the batteries close to the liquid supply side, which will lead to uneven temperatures of the batteries in the battery pack, and the increased temperature difference will affect the performance of the battery. Utility Model Content

[0004] In view of this, the utility model provides an immersion type battery pack, which mainly realizes intermediate liquid supply, shortens the liquid flow path, and reduces the temperature difference of the energy storage component by arranging the energy storage component on different sides of the liquid supply component.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] The utility model provides an immersion type battery pack, comprising:

[0007] A housing (100), the housing (100) comprising a receiving cavity;

[0008] A liquid supply component (300), wherein at least one water supply port (301) is provided on the liquid supply component (300), and the liquid supply component (300) is connected to the accommodating cavity through the water supply port (301);

[0009] A plurality of liquid discharge members (400), each of which is provided with at least one drainage port (401), the liquid discharge member (400) being in communication with the accommodating chamber via the drainage port (401), and the liquid discharge member (400) being located on different sides of the liquid supply member (300);

[0010] A plurality of energy storage components (200) are provided, wherein the energy storage components (200) are located in the accommodating cavity, and the energy storage components (200) are arranged between the liquid supply component (300) and the liquid discharge component (400).

[0011] The liquid supply component (300) comprises a first end and a second end opposite to each other, and the first end of the liquid supply component (300) is used to connect to the liquid storage component;

[0012] The number of the water supply port (301) is one, and the water supply port (301) is a strip-shaped opening, and the opening width of the water supply port (301) increases in the direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300);

[0013] The liquid supply component (300) comprises a first end and a second end opposite to each other, and the first end of the liquid supply component (300) is used to connect to the liquid storage component;

[0014] There are a plurality of water supply ports (301), and the opening area of ​​the water supply ports (301) increases in a direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300).

[0015] The liquid supply component (300) comprises a first end and a second end opposite to each other, and the first end of the liquid supply component (300) is used to connect to the liquid storage component;

[0016] There are a plurality of water supply ports (301), and in a direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300), the distance between adjacent water supply ports (301) decreases.

[0017] Wherein, the energy storage component (200) is arranged on two opposite sides of the liquid supply component (300);

[0018] Alternatively, the energy storage components (200) are evenly arranged around the circumference of the liquid supply component (300).

[0019] Wherein, the number of energy storage components (200) on both sides of the liquid supply component (300) is the same.

[0020] The liquid supply member (300) and the liquid discharge member (400) extend in the same direction.

[0021] There are multiple drainage openings (401), and the multiple drainage openings (401) are evenly arranged in the extension direction of the drainage member (400).

[0022] Wherein, the extension direction of the liquid supply component (300) and the liquid discharge component (400) is a horizontal direction.

[0023] The liquid supply component (300) is located at the bottom end of the accommodating cavity, and the liquid discharge component (400) is located at the top end of the accommodating cavity.

[0024] The energy storage components (200) are arranged in a single layer in the vertical direction.

[0025] The submerged battery pack proposed by the utility model allows the cooling liquid to flow from the liquid supply part to different sides by arranging the discharge parts on different sides of the liquid supply part, and allows the energy storage part to be arranged between the liquid supply part and the discharge parts so that when the cooling liquid flows from the liquid supply part to the discharge part, it passes through the energy storage part to dissipate heat for the energy storage part, and the energy storage parts are distributed on different sides of the liquid supply part, so that the energy storage parts are dispersedly arranged, shortening the distance for the cooling liquid to flow from the liquid supply part to the discharge part, and reducing the number of energy storage parts that need to be cooled during the flow of the cooling liquid, thereby reducing the temperature difference of the cooling liquid at the liquid supply part and the discharge part, ensuring that the energy storage parts close to the discharge part can also be effectively cooled, thereby solving the problem of unstable performance of the submerged battery pack caused by the temperature difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a portion of the structure of a first submerged battery pack provided by an embodiment of the utility model at a first viewing angle;

[0027] Figure 2 A partial structural schematic diagram of a second submerged battery pack provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of a portion of the structure of a first immersion battery pack provided by an embodiment of the utility model at a second viewing angle;

[0029] Figure 4 A schematic diagram of the flow of cooling liquid in the first immersion battery pack provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of an immersion battery pack proposed according to the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0031] On the one hand, if Figure 1-2 As shown, the embodiment of the utility model provides an immersion battery pack, comprising:

[0032] A housing (100), the housing (100) comprising a receiving cavity;

[0033] A liquid supply component (300), wherein at least one water supply port (301) is provided on the liquid supply component (300), and the liquid supply component (300) is connected to the accommodating cavity through the water supply port (301);

[0034] A plurality of liquid discharge members (400), each of which is provided with at least one drainage port (401), the liquid discharge member (400) being in communication with the accommodating chamber via the drainage port (401), and the liquid discharge member (400) being located on different sides of the liquid supply member (300);

[0035] A plurality of energy storage components (200) are provided, wherein the energy storage components (200) are located in the accommodating cavity, and the energy storage components (200) are arranged between the liquid supply component (300) and the liquid discharge component (400).

[0036] The housing (100) is a cavity structure, which is used to accommodate the energy storage component (200), and plays the role of supporting and protecting the energy storage component (200), and temporarily retaining the cooling liquid. The outer shape of the housing (100) can be set according to the layout of the energy storage component (200), the liquid supply component (300) and the liquid discharge component (400), such as a box-type structure with a square or cylindrical outer contour. For example, the housing (100) can include a main body and a door, the main body includes an opening, and the door is movably connected to the main body. The door can be opened and closed relative to the opening, and then the containing cavity is opened or closed, which is used for the disassembly and assembly of the energy storage component (200) and the maintenance of the components in the containing cavity. The energy storage component (200) can be a battery, or the energy storage component (200) can also be a capacitor energy storage element or a superconducting energy storage element that can store and release energy. Taking the battery as an example, the battery may generate a temperature rise phenomenon during the charging and discharging process. The heating caused by the discharge of the battery may be due to excessive discharge and large current. Battery aging, increased internal resistance, and electrolyte drying up may all cause the battery to heat up during charging. Heating will affect the performance of the battery, and when heat accumulates for a long time, it may also cause a fire.

[0037] The liquid supply component (300) is a pipeline connected to an external liquid supply component or a liquid storage component, and can be used to transfer cooling liquid to the accommodating chamber. If the liquid supply component (300) includes a first end and a second end opposite to each other, the first end of the liquid supply component (300) is located outside the accommodating chamber, and is used to connect to a liquid supply component, such as a fire hydrant, or other liquid storage components, such as a storage tank, etc. The second end of the liquid supply component (300) extends into the accommodating chamber, and is used to communicate with the accommodating chamber and provide cooling liquid to the accommodating chamber. The liquid discharge component (400) is a pipeline connected to an external liquid storage tank or a cooling device, and can be used to discharge the cooling liquid in the accommodating chamber. If the liquid discharge component (400) includes a first end and a second end opposite to each other, the first end of the liquid discharge component (400) is located outside the accommodating chamber, and is used to connect to a liquid storage tank, such as a cooling tank or a filter tank, etc. The second end of the liquid discharge component (400) extends into the accommodating chamber, and is used to communicate with the accommodating chamber and discharge the cooling liquid in the accommodating chamber. The liquid supply component (300) and the liquid discharge component (400) can both be metal tubes, plastic tubes, or plastic tubes. A hole can be opened on the housing (100), and a sealing component can be arranged around the hole. The liquid supply component (300) and the liquid discharge component (400) are connected to the housing (100) through the hole. Alternatively, the liquid supply component (300) and the liquid discharge component (400) can be welded to the housing (100). The cooling liquid can be water, or other fluids that can be used to cool down and extinguish fire.

[0038] The liquid discharge member (400) is arranged on different sides of the liquid supply member (300), which may be opposite sides or adjacent sides, or arranged on different sides of the liquid supply member (300) in the circumferential direction, such as the front, rear, left and right sides in the circumferential direction. An energy storage member (200) is arranged between any liquid discharge member (400) and the liquid supply member (300), so that the energy storage member (200) is distributed on different sides of the liquid supply member (300). Compared with the prior art in which the energy storage components (200) are distributed on the same side of the liquid supply component (300), the number of energy storage components (200) between the liquid supply component (300) and the liquid discharge component (400) of the present application will be greatly reduced, and the distance for the cooling liquid to flow from the liquid supply component (300) to the liquid discharge component (400) will also be shortened, thereby shortening the temperature difference of the cooling liquid between the liquid supply component (300) and the liquid discharge component (400), avoiding the energy storage component (200) close to the liquid discharge component (400) from being too high, thereby ensuring the performance of the battery pack.

[0039] The immersed battery pack proposed in the embodiment of the utility model, by arranging drainage members located on different sides of the liquid supply member, allows the cooling liquid to flow from the liquid supply member to different sides, and by arranging the energy storage member between the liquid supply member and the drainage member, when the cooling liquid flows from the liquid supply member to the drainage member, the cooling liquid passes through the energy storage member to dissipate the heat for the energy storage member, and the energy storage members are distributed on different sides of the liquid supply member, so that the energy storage members are dispersedly arranged, shortening the distance of the cooling liquid flowing from the liquid supply member to the drainage member, and reducing the number of energy storage members that need to be cooled during the flow of the cooling liquid, thereby reducing the temperature difference of the cooling liquid at the liquid supply member and the drainage member, ensuring that the energy storage member close to the drainage member can also be effectively cooled, thereby solving the problem of unstable performance of the immersed battery pack caused by the temperature difference.

[0040] In one embodiment, the liquid supply member (300) comprises a first end and a second end opposite to each other, the first end of the liquid supply member (300) is used to connect to the liquid storage member, and the second end of the liquid supply member (300) is located in the accommodating chamber. The distance between the second end of the liquid supply member (300) and the liquid storage member is greater than the distance between the first end of the liquid supply member (300) and the liquid storage member, that is, the distance that the cooling liquid flows from the liquid storage member to the second end of the liquid supply member (300) is greater than the distance that the cooling liquid flows to the first end of the liquid supply member (300), which results in more pressure loss along the way when the cooling liquid flows to the second end of the liquid supply member (300). At the same time, the cooling liquid flows out near the first end of the liquid supply member (300), which further reduces the pressure of the cooling liquid near the second end of the liquid supply member (300), thereby resulting in a low flow rate of the cooling liquid near the second end of the liquid supply member (300). The opening size or density of the water supply port (301) at the second end of the liquid supply member (300) can be set to be larger than the opening size or density of the water supply port (301) at the first end of the liquid supply member (300), so as to reduce the outflow amount of the cooling liquid at the first end of the liquid supply member (300), so that more cooling liquid can flow out from the second end of the liquid supply member (300), and the dual reduction of the cooling liquid flow rate and pressure at the second end of the liquid supply member (300) can be balanced to balance the insufficient flow rate at the second end of the liquid supply member (300), that is, the cooling liquid at the second end of the liquid supply member (300) is insufficient. The cooling liquid flows out at the first end of the liquid supply component (300) in a small cross-section and fast manner, while the cooling liquid flows out at the second end of the liquid supply component (300) in a large cross-section and slower manner, thereby reducing the difference in flow rate between the first end of the liquid supply component (300) and the second end of the liquid supply component (300), so that the cooling liquid can enter the accommodating cavity more evenly through the liquid supply component (300), and the cooling liquid can be discharged to the accommodating cavity more evenly through the multiple water supply ports (301), so that the energy storage component (200) is evenly cooled in the extension direction of the liquid supply component (300).

[0041] The change in the opening size of the water supply port (301) can be achieved in a variety of ways. For example, in one embodiment, the number of water supply ports (301) is one, and the water supply port (301) is a strip-shaped opening. The opening width of the water supply port (301) increases in the direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300), thereby reducing the outflow cross-section of the water supply port (301) close to the first end of the liquid supply member (300), thereby reducing the flow rate. In another embodiment, Figure 2 As shown, there are multiple water supply ports (301), and the opening area of ​​the water supply ports (301) increases in the direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300). For example, the water supply ports (301) can all be square openings, and the extension length of the water supply ports (301) in the circumferential direction of the liquid supply member (300) increases in the direction close to the second end of the liquid supply member (300), thereby increasing the outflow cross-section close to the second end of the liquid supply member (300), thereby increasing the flow rate. Alternatively, there can be multiple water supply ports (301), and the distance between adjacent water supply ports (301) decreases in the direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300). For example, the water supply ports (301) are of uniform size, but the water supply ports (301) near the first end of the liquid supply member (300) are sparsely arranged, while the water supply ports (301) near the second end of the liquid supply member (300) are densely arranged, thereby reducing the flow rate near the first end of the liquid supply member (300).

[0042] There are many ways to position the energy storage member (200) on different sides of the liquid supply member (300). For example, in one embodiment, the energy storage member (200) is disposed on opposite sides of the liquid supply member (300). Figure 1-2 As shown, the energy storage components (200) are evenly distributed on the left and right sides of the liquid supply component (300). Alternatively, the energy storage components (200) may be evenly arranged around the circumference of the liquid supply component (300).

[0043] For the convenience of explanation, in the following implementation modes, Figure 1-2 As shown, the energy storage components (200) are distributed on the left and right sides of the liquid supply component (300), and the energy storage components (200) are divided into multiple energy storage groups, the energy storage groups include multiple energy storage components (200), the energy storage groups are arranged in a first direction X, and the multiple energy storage components (200) in any energy storage group are arranged in a second direction Y, and the first direction X and the second direction Y are perpendicular. When the battery pack is in use, the first direction X and the second direction Y are both horizontal directions. For example, the number of energy storage groups may be four, and the energy storage group may include twelve energy storage components (200).

[0044] In one embodiment, the liquid supply member (300) and the liquid discharge member (400) extend in the same direction. The liquid supply member (300) and the liquid discharge member (400) are both extended and arranged in the second direction Y, and the number of energy storage members (200) on both sides of the liquid supply member (300) is the same, thereby ensuring that the energy storage members (200) on both sides of the liquid supply member (300) can be evenly cooled. If the number of liquid discharge members (400) is two, the two liquid discharge members (400) are respectively arranged on both sides of the liquid supply member (300) in the first direction X, and the distance between the liquid discharge member (400) and the liquid supply member (300) is the same. Between the liquid discharge member (400) and the liquid supply member (300), or in other words, two energy storage groups are respectively arranged on opposite sides of the liquid supply member (300), and then between any liquid discharge member (400) and the liquid supply member (300), twelve rows and two columns of energy storage members (200) are arranged.

[0045] In one embodiment, there are multiple drain ports (401), and the multiple drain ports (401) are evenly arranged in the extension direction of the drain member (400), or in other words, the multiple drain ports (401) are evenly arranged in the second direction Y. This ensures that the cooling liquid is evenly discharged. The size of the drain port (401) can be adjusted according to the actual required flow rate of the cooling liquid, and this application does not impose any limitation.

[0046] like Figure 4 As shown, it is a schematic diagram of the flow of the cooling liquid when the battery pack is viewed from above, and the lower end of the liquid supply component (300) in the figure is the first end of the liquid supply component (300), and the cooling liquid flows from the first end to the second end in the second direction Y in the liquid supply component (300), and flows evenly to both sides in the first direction X toward the liquid discharge component (400).

[0047] In one embodiment, the extension direction of the liquid supply component (300) and the liquid discharge component (400) is a horizontal direction, the liquid supply component (300) is located at the bottom end of the accommodating cavity, and the liquid discharge component (400) is located at the top end of the accommodating cavity.

[0048] After the cooling liquid flows out of the liquid supply component (300), it flows into the bottom end of the accommodating chamber, and then accumulates in the accommodating chamber as the cooling liquid flows out, until it reaches the top end of the accommodating chamber and is then discharged by the liquid discharge component (400). The cooling liquid can then completely immerse the energy storage component (200) in the vertical direction, thereby avoiding the problem that the top end of the energy storage component (200) may not be in contact with the cooling liquid due to the liquid supply component (300) and the liquid discharge component (400) being arranged at the bottom at the same time, and avoiding the problem that part of the cooling liquid may flow out directly from the upper part of the accommodating chamber due to the liquid supply component (300) and the liquid discharge component (400) being arranged at the top at the same time, thereby avoiding the problem that part of the cooling liquid may flow out directly from the upper part of the accommodating chamber and fail to contact the bottom end of the energy storage component (200), resulting in the cooling liquid not being fully utilized.

[0049] In one embodiment, the energy storage component (200) is arranged in a single layer in the vertical direction, and there are small gaps between the energy storage component (200) and the top wall and the bottom wall of the accommodating cavity, thereby reducing the temperature difference in the vertical direction caused by the vertical arrangement of the energy storage component (200), accelerating the flow of the cooling liquid, and increasing the contact between the cooling liquid and the energy storage component (200).

[0050] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An immersion battery pack, characterized in that: include: A housing (100), wherein the housing (100) comprises a receiving cavity; A liquid supply component (300), wherein at least one water supply port (301) is provided on the liquid supply component (300), and the liquid supply component (300) is connected to the accommodating cavity through the water supply port (301); a plurality of liquid discharge members (400), each of the liquid discharge members (400) being provided with at least one drainage port (401), the liquid discharge member (400) being in communication with the accommodating cavity through the drainage port (401), and the liquid discharge members (400) being located on different sides of the liquid supply member (300); A plurality of energy storage components (200), wherein the energy storage components (200) are located in the accommodating cavity, and the energy storage components (200) are arranged between the liquid supply component (300) and the liquid discharge component (400).

2. The submerged battery pack according to claim 1, characterized in that: The liquid supply member (300) comprises a first end and a second end opposite to each other, and the first end of the liquid supply member (300) is used for connecting to the liquid storage member; The number of the water supply port (301) is one, and the water supply port (301) is a strip-shaped opening. In the direction from the first end of the liquid supply component (300) to the second end of the liquid supply component (300), the opening width of the water supply port (301) increases.

3. The submerged battery pack according to claim 1, characterized in that: The liquid supply member (300) comprises a first end and a second end opposite to each other, and the first end of the liquid supply member (300) is used for connecting to the liquid storage member; The number of the water supply ports (301) is plural, and the opening area of ​​the water supply ports (301) increases in the direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300).

4. The submerged battery pack according to claim 1, characterized in that: The liquid supply member (300) comprises a first end and a second end opposite to each other, and the first end of the liquid supply member (300) is used for connecting to the liquid storage member; The number of the water supply ports (301) is plural, and the distance between adjacent water supply ports (301) decreases in the direction from the first end of the liquid supply member (300) to the second end of the liquid supply member (300).

5. The submerged battery pack according to claim 1, characterized in that: The energy storage component (200) is arranged on two opposite sides of the liquid supply component (300); Alternatively, the energy storage components (200) are evenly arranged around the circumference of the liquid supply component (300).

6. The submerged battery pack according to claim 1, characterized in that: The number of the energy storage components (200) on both sides of the liquid supply component (300) is the same.

7. The submerged battery pack according to claim 1, characterized in that: The liquid supply member (300) and the liquid discharge member (400) extend in the same direction.

8. The submerged battery pack according to claim 7, characterized in that: There are a plurality of drainage openings (401), and the plurality of drainage openings (401) are evenly arranged in the extension direction of the liquid discharge member (400).

9. The submerged battery pack according to claim 1, characterized in that: The extension direction of the liquid supply member (300) and the liquid discharge member (400) is a horizontal direction; The liquid supply component (300) is located at the bottom end of the accommodating cavity, and the liquid discharge component (400) is located at the top end of the accommodating cavity.

10. The submerged battery pack according to claim 1, characterized in that: The energy storage components (200) are arranged in a single layer in the vertical direction.

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