An immersed battery pack

Abstract

This utility model belongs to the field of immersion liquid-cooled energy storage technology, and discloses an immersion battery pack, including a housing, a battery module, a liquid level sensor, and an alarm. The housing includes a cover and a body. The cover is provided with a liquid replenishment port, and the side wall of the body is provided with a sight glass. The sight glass can display the liquid level of the coolant in the housing. When the coolant in the housing is too low, the operator can replenish the coolant through the liquid replenishment port. Secondly, the battery module is located in the housing and is staggered from the liquid replenishment port. When replenishing the coolant, the coolant will not directly impact the battery module, thus avoiding temperature difference impact on the battery module. In addition, the liquid level sensor monitors the liquid level of the coolant in real time. When the liquid level of the coolant is lower than the preset level, the alarm can sound an alarm. This provides double protection for liquid level detection and improves the reliability and safety of the overall system.

Description

Technical Field

[0001] This utility model relates to the field of immersion liquid-cooled energy storage technology, and in particular to an immersion battery pack. Background Technology

[0002] Submersible battery packs are a new type of battery pack design that completely immerses the battery cells in coolant to improve heat dissipation efficiency and battery performance. During the cooling process of the battery cells, the coolant may evaporate under the high temperature of the cells, leading to a decrease in coolant level after long-term operation. Alternatively, the coolant may undergo chemical changes or decomposition during long-term use, also resulting in a decrease in coolant level. Because battery packs generally use highly sealed, corrosion-resistant metal materials, operators cannot directly observe the internal liquid level. When the coolant level is too low, the fault cannot be detected immediately, leading to reduced cooling efficiency or system performance failure, resulting in losses. Utility Model Content

[0003] The purpose of this invention is to provide a visually appealing and highly secure immersion battery pack.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An immersion battery pack, comprising:

[0006] A container is provided with a receiving cavity inside, which can hold coolant. The container includes a lid and a body. The lid is provided with a liquid inlet, and the side wall of the body is provided with a sight glass that can display the liquid level of the coolant in the receiving cavity.

[0007] A battery module, wherein the battery module is located within the receiving cavity and is offset from the liquid replenishment port;

[0008] A liquid level sensor and an alarm are installed on the sight glass. The liquid level sensor is used to detect the liquid level of the coolant in real time, and the alarm can sound an alarm when the liquid level of the coolant is lower than a preset level.

[0009] Preferably, the sight glass includes a viewing housing, the housing has a communication port that communicates with the receiving cavity, and the viewing housing is connected to the housing and covers the communication port.

[0010] Preferably, the visible housing is provided with a liquid level indicator.

[0011] Preferably, the submersible battery pack further includes a first connector and a second connector, the first connector being used to connect the cover to the housing, and the second connector being used to fix the battery module inside the receiving cavity.

[0012] Preferably, the lid is provided with a first connecting part, and the body is provided with a second connecting part. The first connecting part is provided with a first connecting hole, and the second connecting part is provided with a second connecting hole. The first connector passes through the first connecting hole and the second connecting hole in sequence to connect the lid and the body.

[0013] Preferably, a connecting groove is recessed on the bottom wall of the receiving cavity, and a third connecting hole is provided on the battery module. The second connector passes through the third connecting hole and the connecting groove in sequence to fix the battery module in the receiving cavity.

[0014] Preferably, the battery module includes a package and multiple battery cells, the package being used to fix the multiple battery cells, and the third connection hole being disposed on the package.

[0015] Preferably, a dust cover is provided above the liquid replenishment port.

[0016] Preferably, the immersion battery pack further includes a temperature sensor disposed on the battery module for detecting the temperature of the battery module.

[0017] Preferably, at least two battery modules are provided, and a heat dissipation channel is provided between two adjacent battery modules.

[0018] The beneficial effects of this utility model are:

[0019] This invention proposes an immersion battery pack, including a housing, a battery module, a liquid level sensor, and an alarm. The housing has a containment cavity for holding coolant. The housing includes a cover and a body. The cover has a coolant inlet, and the side wall of the body has a sight glass displaying the coolant level in the containment cavity. Operators can directly observe the coolant level, greatly improving inspection efficiency. When the coolant level in the containment cavity is too low, operators can add coolant through the inlet, preventing reduced cooling effect or system performance failure due to low coolant levels. Furthermore, the battery module is located within the containment cavity. Furthermore, the coolant is positioned away from the replenishment port, preventing direct impact on the battery module during replenishment and thus avoiding temperature-related shocks (such as direct impact of low-temperature replenishment on a high-temperature battery), which can extend battery life. In addition, the level sensor and alarm are located on the sight glass. The level sensor monitors the coolant level in real time, and the alarm sounds when the coolant level is lower than the preset level. Operators can not only observe the coolant level in the containment chamber in real time through the sight glass, but the level sensor and alarm also provide reminders, providing double protection for level detection and improving the overall reliability and safety of the system. Attached Figure Description

[0020] Figure 1 This is an exploded view of the immersion battery pack proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the immersion battery pack proposed in this utility model;

[0022] Figure 3 This is a side view of the immersion battery pack proposed in this utility model;

[0023] Figure 4 yes Figure 3 Sectional view at point A in the middle.

[0024] In the picture:

[0025] 1. Container box; 11. Box cover; 111. Liquid filling port; 112. First connecting part; 1121. First connecting hole; 12. Box body; 121. Sight window; 122. Second connecting part; 1221. Second connecting hole; 13. Container cavity; 131. Positioning protrusion; 1311. Connecting groove; 2. Battery module; 21. Package; 22. Battery cell; 3. First connecting piece; 4. Second connecting piece. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Reference Figures 1 to 4This embodiment proposes an immersion battery pack, including a housing 1, a battery module 2, a liquid level sensor, and an alarm. The housing 1 has a housing cavity 13 capable of holding coolant. The housing 1 includes a cover 11 and a body 12. The cover 11 has a coolant inlet 111, and the side wall of the body 12 has a sight glass 121 that displays the coolant level in the housing cavity 13. Operators can directly observe the coolant level visually, greatly improving inspection efficiency. When the coolant level in the housing cavity 13 is too low, operators can add coolant through the coolant inlet 111 to prevent a decrease in cooling effect or system performance failure due to low coolant level. Secondly, the battery module 2 is located inside the receiving cavity 13 and is offset from the replenishment port 111. During replenishment, the coolant will not directly impact the battery module 2, thus avoiding temperature difference impact on the battery module 2 (such as low-temperature replenishment directly impacting high-temperature batteries), which can extend battery life. In addition, the liquid level sensor and alarm are installed on the sight glass 121. The liquid level sensor is used to monitor the liquid level of the coolant in real time. When the liquid level of the coolant is lower than the preset level, the alarm can sound an alarm. The operator can not only observe the liquid level of the coolant in the receiving cavity 13 in real time through the sight glass 121, but the liquid level sensor and alarm can also provide reminders, providing double protection for liquid level detection and improving the reliability and safety of the overall system.

[0031] The liquid level sensor and alarm are both integrated on a single PCBA circuit board, which is mounted on the sight glass 121, reducing space usage and improving reliability.

[0032] Understandably, the preset liquid level is the safe threshold for the coolant level in the containment chamber 13, representing the minimum coolant height required for normal battery operation. When the liquid level is higher than the preset liquid level, the battery can dissipate heat normally and operate normally.

[0033] In addition, a dust cover is provided above the liquid filling port 111 to prevent dust or foreign objects from entering the receiving cavity 13 through the liquid filling port 111, causing blockage of the pipes, affecting cooling efficiency, or even damaging the battery module 2.

[0034] Furthermore, the sight glass 121 includes a viewing housing, and the housing 12 is provided with a connecting port that communicates with the receiving cavity 13. The viewing housing is connected to the housing 12 and covers the connecting port. The viewing housing includes a receiving cavity. When the viewing housing is connected to the housing 12, the viewing housing covers the connecting port, and the receiving cavity communicates with the receiving cavity 13 through the connecting port. The coolant in the receiving cavity 13 can enter the receiving cavity through the connecting port. Due to the communicating vessel effect (the communicating vessel effect refers to the phenomenon that the liquid level in containers with the same liquid connected at the bottom always remains at the same height), the liquid level of the coolant in the receiving cavity is always level with the liquid level of the coolant in the receiving cavity 13. Therefore, the actual liquid level of the coolant in the receiving cavity 13 can be determined by observing the liquid level of the coolant in the receiving cavity of the viewing housing. Preferably, the viewing housing is a transparent housing with high light transmittance and high observation accuracy. Secondly, in order to enable operators to clearly observe the liquid level in the containment chamber even in dim environments, a small light can be installed on the tank 12, specifically near the visible housing, to improve visibility.

[0035] Furthermore, the PCBA circuit board can be embedded in the inner surface of the visible housing within the accommodating cavity, thereby enabling the liquid level sensor to detect the liquid level of the coolant within the accommodating cavity 13.

[0036] In addition, the visible housing is connected to the enclosure 12 by screws, and a seal is provided at the connection between the visible housing and the enclosure 12 to ensure the airtightness between the visible housing and the enclosure 12 and prevent the coolant in the accommodating cavity from overflowing.

[0037] To facilitate operators' observation of the specific liquid level, a liquid level indicator is provided on the visible housing, allowing operators to directly read the specific liquid level of the coolant in the receiving cavity 13, which is highly readable.

[0038] Both the level sensor and the alarm are connected to the BMS (Battery Management System) of the submersible battery pack. In this embodiment, the level sensor is specifically a capacitive level sensor, including a probe. When the probe is immersed in the coolant, the capacitance value increases significantly, resulting in a low-level output. When the probe is not in contact with the coolant, the capacitance value decreases significantly, resulting in a high-level output. The BMS continuously monitors the output signal of the capacitive level sensor. When the capacitive level sensor outputs a high-level signal, it determines that the coolant level is too low, and the alarm sounds to remind the operator. Of course, in other embodiments, the level sensor can also be an ultrasonic level sensor.

[0039] The submersible battery pack also includes a first connector 3 and a second connector 4. The first connector 3 is used to connect the cover 11 to the housing 12, and the second connector 4 is used to fix the battery module 2 in the receiving cavity 13.

[0040] Specifically, the lid 11 is provided with a first connecting part 112, and the body 12 is provided with a second connecting part 122. The first connecting part 112 is provided with a first connecting hole 1121, and the second connecting part 122 is provided with a second connecting hole 1221. The first connecting member 3 passes through the first connecting hole 1121 and the second connecting hole 1221 in sequence to connect the lid 11 and the body 12. The first connecting part 112 is arranged around the circumference of the lid 11, and the second connecting part 122 is located at the opening on the body 12 and surrounds the opening to improve connection stability. When the first connecting part 112 and the second connecting part 122 are aligned, the first connecting hole 1121 and the second connecting hole 1221 are also aligned. The first connecting member 3 passes through the first connecting hole 1121 and the second connecting hole 1221 to connect the lid 11 and the body 12. Furthermore, to improve connection strength, multiple second connecting holes 1221 are provided. Preferably, the first connector 3 is a bolt, and the inner walls of the first connecting hole 1121 and the second connecting hole 1221 are both provided with threads. The first connector 3 is threadedly connected to the first connecting part 112 and the second connecting part 122, which has high ease of operation.

[0041] To ensure the airtightness of the cavity 13 and prevent coolant from overflowing from the connection between the cover 11 and the body 12, a sealing ring is provided between the cover 11 and the body 12.

[0042] To ensure the installation stability of the battery module 2 within the receiving cavity 13, a connecting groove 1311 is recessed on the bottom wall of the receiving cavity 13. A third connecting hole is provided on the battery module 2. The second connector 4 passes through the third connecting hole and the connecting groove 1311 in sequence to fix the battery module 2 within the receiving cavity 13. To avoid increasing the bottom wall thickness of the housing 12 due to the presence of the connecting groove 1311, a positioning protrusion 131 can be protruded from the bottom of the receiving cavity 13. The positioning protrusion 131 can wrap around the side wall of the end of the battery module 2. The connecting groove 1311 is then placed on the positioning protrusion 131, which not only reduces the bottom wall thickness of the housing 12 but also allows for pre-positioning of the battery module 2. In addition, the battery module 2 includes a package 21 and multiple battery cells 22. The package 21 arranges and fixes the multiple battery cells 22 together to prevent the battery cells 22 from deforming or shifting. The third connection hole is set on the package 21. The package 21 is generally made of a rigid material such as metal or high-strength plastic, which can directly use the rigidity of the package 21 to withstand external stress and avoid damage caused by opening holes in the fragile battery cells 22.

[0043] Preferably, the second connector 4 is a bolt, and threads are provided on the hole wall of the third connecting hole and the inner side wall of the connecting groove 1311. The second connector 4 is threadedly connected to the battery module 2 and the cavity wall of the receiving cavity 13.

[0044] The submersible battery pack also includes a temperature sensor, which is installed on battery module 2 to detect the temperature of battery module 2. Specifically, the temperature sensor is also connected to the BMS of the submersible battery pack. When the temperature sensor detects that the temperature of battery module 2 is too high, the alarm will also sound, and the operator can take other cooling measures.

[0045] At least two battery modules 2 are provided, and the at least two battery modules 2 are connected in series. A heat dissipation channel is provided between two adjacent battery modules 2. The heat generated by the battery modules 2 can be dissipated from the heat dissipation channel. Moreover, the multiple battery modules 2 are not tightly attached to each other, which increases the contact area between the battery modules 2 and the coolant, improves the cooling effect, and extends the battery life. In addition, the heat dissipation channel can also provide space for maintenance or inspection of the battery modules 2, which facilitates fault detection and repair.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A submersible battery pack, characterized in that, include: A container (1) is provided with a container cavity (13) inside the container (1), which can hold coolant. The container (1) includes a cover (11) and a body (12). A liquid inlet (111) is provided on the cover (11), and a sight window (121) is provided on the side wall of the body (12). The sight window (121) can display the liquid level of the coolant in the container cavity (13). Battery module (2), the battery module (2) is located in the receiving cavity (13) and is offset from the liquid replenishment port (111); A liquid level sensor and an alarm are installed on the sight glass (121). The liquid level sensor is used to detect the liquid level of the coolant in real time. When the liquid level of the coolant is lower than the preset liquid level, the alarm can issue an alarm.

2. The immersion battery pack according to claim 1, characterized in that, The sight glass (121) includes a sight housing, and the housing (12) is provided with a communication port, which is connected to the receiving cavity (13). The sight housing is connected to the housing (12) and covers the communication port.

3. The immersion battery pack according to claim 2, characterized in that, The visible housing is equipped with a liquid level indicator.

4. The submersible battery pack according to any one of claims 1-3, characterized in that, The immersion battery pack also includes a first connector (3) and a second connector (4). The first connector (3) is used to connect the cover (11) to the box body (12), and the second connector (4) is used to fix the battery module (2) in the receiving cavity (13).

5. The immersion battery pack according to claim 4, characterized in that, The lid (11) is provided with a first connecting part (112), and the body (12) is provided with a second connecting part (122). The first connecting part (112) is provided with a first connecting hole (1121), and the second connecting part (122) is provided with a second connecting hole (1221). The first connector (3) passes through the first connecting hole (1121) and the second connecting hole (1221) in sequence to connect the lid (11) and the body (12).

6. The immersion battery pack according to claim 4, characterized in that, The bottom cavity wall of the receiving cavity (13) is recessed with a connecting groove (1311), and the battery module (2) is provided with a third connecting hole. The second connector (4) passes through the third connecting hole and the connecting groove (1311) in sequence to fix the battery module (2) in the receiving cavity (13).

7. The immersion battery pack according to claim 6, characterized in that, The battery module (2) includes a package (21) and a plurality of battery cells (22). The package (21) is used to fix the plurality of battery cells (22), and the third connection hole is provided on the package (21).

8. The submersible battery pack according to any one of claims 1-3, characterized in that, A dust cover is provided above the liquid replenishment port (111).

9. The submersible battery pack according to any one of claims 1-3, characterized in that, The immersion battery pack also includes a temperature sensor, which is disposed on the battery module (2) and is used to detect the temperature of the battery module (2).

10. The immersion battery pack according to any one of claims 1-3, characterized in that, At least two battery modules (2) are provided, and a heat dissipation channel is provided between two adjacent battery modules (2).

Images