Battery device applied to immersed battery

Abstract

The invention discloses a battery device applied to an immersed battery, and relates to the technical field of battery devices.The battery device comprises a shell, the shell is provided with a first mounting cavity and a second mounting cavity which are arranged in a separated mode, and the second mounting cavity is provided with an opening communicated with the outside; the battery module is arranged in the first mounting cavity; the power distribution unit is arranged in the second mounting cavity, and the power distribution unit is electrically connected with the battery module; the electric connector is arranged at the opening, one end of the electric connector is electrically connected with the power distribution unit, and the other end of the electric connector is used for being electrically connected with an external device; according to the technical effects provided by the invention, by adopting the first mounting cavity and the second mounting cavity which are separately arranged, the battery module is immersed in the cooling liquid in the first mounting cavity, and the power distribution unit is intensively arranged in the second mounting cavity; therefore, the problems of disordered cables, difficulty in assembly, inconvenience in monitoring and low heat management efficiency caused by dispersion of the power distribution units are solved.

Description

Technical Field

[0001] This invention relates to the field of battery device technology, and in particular to a battery device for use in immersion batteries. Background Technology

[0002] Backup battery units are energy storage devices designed to ensure the continued operation of critical equipment in data centers (such as servers, storage systems, and network equipment) during power outages. These battery units are a key component of data centers or power plants, capable of instantly switching power supply after a power failure, preventing data loss, hardware damage, or business interruption due to power outages. However, existing battery units have complex internal structures, making it inconvenient to manage the power distribution units and battery modules. Furthermore, installing battery units on servers is cumbersome and does not meet user needs. Summary of the Invention

[0003] The main objective of this invention is to propose a battery device for immersion batteries, aiming to improve the problem of inconvenient control over the power distribution unit and battery module.

[0004] To achieve the above objectives, the present invention proposes a battery device for an immersion battery, comprising a housing having a first mounting cavity and a second mounting cavity separated from each other, the second mounting cavity having an opening communicating with the outside, and a coolant disposed in the first mounting cavity; a battery module disposed in the first mounting cavity, at least a portion of the battery module being immersed in the coolant; a power distribution unit disposed in the second mounting cavity, the power distribution unit being electrically connected to the battery module via a wire; and an electrical connector disposed at the opening, one end of the electrical connector being electrically connected to the power distribution unit, and the other end of the electrical connector being used for electrical connection to an external device.

[0005] In one embodiment, the housing includes a first housing, a cover plate, and a second housing disposed within the first housing. The cover plate covers the second housing so that the cover plate and the second housing enclose and form the first mounting cavity, and the first housing has the second mounting cavity.

[0006] In one embodiment, the battery device applied to the immersion battery further includes a battery management system, which is disposed in one of the first mounting cavity and the second mounting cavity. The battery management system includes a battery management circuit board and a battery sampling component. The battery sampling component is electrically connected to the battery module, the battery management circuit board, and the power distribution unit, respectively. The battery sampling component is used to collect voltage signals and / or temperature signals of the battery module and transmit the collected signals to the battery management circuit board. The battery management circuit board is used to control the battery module.

[0007] In one embodiment, the battery device applied to the immersion battery further includes a plurality of battery separators, the battery module includes a plurality of battery cells, at least one of the outer walls on both sides of the battery separator is disposed between the battery cell and the inner wall of the second housing, and at least one of the outer walls on both sides of the battery separator and the outer wall of the battery cell are configured to form a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is arranged along the length direction of the battery separator, and the second heat exchange channel is arranged along the height direction of the battery separator, and the first heat exchange channel and the second heat exchange channel are configured to allow coolant to flow.

[0008] In one embodiment, the battery device applied to the submersible battery further includes a lead wire seat and a sealing ring. The lead wire seat is disposed on the second housing. The lead wire seat includes a base and a plurality of lead wire posts disposed on the base. The lead wire posts have lead wire holes. The sealing ring is disposed in the lead wire holes. The wires of the battery module pass through the lead wire holes and are electrically connected to the power distribution unit. The sealing ring is used to seal the connection between the wires of the battery module and the lead wire holes.

[0009] In one embodiment, the battery device applied to the immersion battery further includes a liquid level detection device disposed in the first mounting cavity. The liquid level detection device is electrically connected to the power distribution unit through the lead wire seat, and the liquid level detection device is used to detect the liquid level height of the coolant in the first mounting cavity.

[0010] In one embodiment, the battery device applied to the immersion battery includes a pressure relief valve, the cover plate has an inlet for supplying coolant, the inlet communicating with the first mounting cavity, the inlet being located above the battery module, and the pressure relief valve being detachably disposed at the inlet to allow gas in the mounting cavity to be discharged outside the housing.

[0011] In one embodiment, the electrical connector has a plurality of first connecting portions on the side away from the second mounting cavity, and a plurality of second connecting portions on the side of the electrical connector close to the second mounting cavity. The electrical connector is electrically connected to the power distribution unit through the plurality of second connecting portions, and the first connecting portions are used for electrical connection to external devices.

[0012] In one embodiment, the battery device applied to the immersion battery further includes a mounting bracket disposed within the first mounting cavity. The mounting bracket has multiple mounting holes, and multiple battery cells are inserted one-to-one into the multiple mounting holes.

[0013] In one embodiment, the battery device applied to the immersion battery further includes a support member mounted on the battery module and located above the battery module. The support member has a support portion protruding on the side opposite to the battery module, and the support member abuts against the cover plate through the support portion, so that an installation gap is formed between the cover plate and the battery module.

[0014] The technical solution of the present invention uses a first mounting cavity and a second mounting cavity that are separated. The battery module is immersed in the coolant located in the first mounting cavity, and the power distribution unit is centrally located in the second mounting cavity. The electrical connector is located at the opening, which makes it easier for the electrical connector to connect to external devices. This solves the problems of messy cables, difficult assembly, inconvenient monitoring, and low thermal management efficiency caused by the dispersion of power distribution units. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a battery device according to an embodiment of the present invention, applied to an immersion battery.

[0017] Figure 2 This is a schematic diagram of another embodiment of the battery device applied to an immersion battery provided by the present invention.

[0018] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0019] Figure 4 This is a schematic diagram of another embodiment of the battery device applied to an immersion battery provided by the present invention.

[0020] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0021] Figure 6 This is a schematic diagram of a battery separator in a battery device for use in an immersed battery according to the present invention.

[0022] Explanation of icon numbers:

[0023] 1. Housing; 11. First mounting cavity; 12. Second mounting cavity; 121. Opening; 13. First housing; 14. Cover plate; 141. Liquid inlet; 15. Second housing; 2. Battery module; 21. Battery cell; 3. Power distribution unit; 4. Electrical connector; 41. First connection part; 42. Second connection part; 5. Battery separator; 51. First heat exchange channel; 52. Second heat exchange channel; 6. Wire seat; 61. Base; 62. Wire post; 621. Wire hole; 7. Sealing ring; 8. Pressure relief valve; 9. Mounting bracket; 91. Mounting hole; 92. Support; 93. Support part.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] This invention proposes a battery device for use in immersion batteries.

[0029] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the battery device applied to an immersion battery includes a housing 1, a battery module 2, a power distribution unit 3, and an electrical connector 4. The housing 1 has a first mounting cavity 11 and a second mounting cavity 12 separated from each other. The second mounting cavity 12 has an opening 121 communicating with the outside. The first mounting cavity 11 contains coolant. The battery module 2 is disposed within the first mounting cavity 11, and at least a portion of the battery module 2 is immersed in the coolant. The power distribution unit 3 is disposed within the second mounting cavity 12 and is electrically connected to the battery module 2 via a wire. The electrical connector 4 is located at the opening 121. One end of the electrical connector 4 is electrically connected to the power distribution unit 3, and the other end of the electrical connector 4 is used for electrical connection to external devices.

[0030] The technical solution of the present invention uses a first mounting cavity 11 and a second mounting cavity 12 that are separated. The battery module 2 is immersed in the coolant located in the first mounting cavity 11, and the power distribution unit 3 is centrally located in the second mounting cavity 12. The electrical connector 4 is located at the opening 121 for easy connection, thereby solving the problems of messy cables, difficult assembly, inconvenient monitoring and low thermal management efficiency caused by the dispersion of the power distribution unit 3.

[0031] In this embodiment, the housing 1 of the battery device applied to the immersion battery is designed with a first mounting cavity 11 and a second mounting cavity 12 separated from each other. The first mounting cavity 11 is configured to accommodate the battery module 2, and coolant is stored in the first mounting cavity 11. The battery module 2 is immersed in the coolant to achieve heat dissipation. The second mounting cavity 12 is configured to accommodate the power distribution unit 3. One side of the housing 1 has an opening 121 communicating with the second mounting cavity 12. The opening 121 is used for the installation of the power supply connector 4, so that the power distribution unit 3 in the second housing cavity can be connected to an external device through the power connector 4. The housing 1 can be constructed by integral molding or multi-part assembly. The interior of the housing 1 is physically separated by partitions or walls, thus forming the first mounting cavity 11 and the second mounting cavity 12 separated from each other within the housing 1. The coolant can be a liquid with good thermal conductivity, such as deionized water or a special coolant, and the coolant can be injected through a pre-reserved injection port on the housing 1. Battery module 2 is disposed within the first mounting cavity 11, and at least a portion of battery module 2 is immersed in the coolant. This arrangement ensures that the heat generated by battery module 2 during operation is absorbed by the coolant in a timely manner, thereby maintaining the operating temperature of battery module 2 within a suitable range. Battery module 2 can be composed of multiple battery cells 21 connected in series or parallel and fixed within the first mounting cavity 11. The immersion depth of battery module 2 in the coolant can be adjusted according to the actual heat dissipation requirements of battery module 2 to ensure effective heat exchange between the coolant and battery module 2. Power distribution unit 3 is disposed within the second mounting cavity 12 and electrically connected to battery module 2 via wiring. Power distribution unit 3 manages and distributes the electrical energy of battery module 2 and provides necessary protection. For example, power distribution unit 3 can be a module integrating relays, fuses, current sensors, and control circuits, connected to the output terminal of battery module 2 via a wire harness. Power distribution unit 3 can be fixed to the inner wall of the second mounting cavity 12 or mounted using a bracket. An electrical connector 4 is disposed at the opening 121 of the second mounting cavity 12. One end of the connector 4 is electrically connected to the power distribution unit 3, and the other end is configured for electrical connection to an external device. This arrangement allows the battery device to be easily connected to an external charging device or monitoring system while maintaining relative isolation between the power distribution unit 3 inside the second mounting cavity 12 and the external environment. For example, the connector 4 can be a multi-pin socket, with its internal pins connected to the output line of the power distribution unit 3 by soldering or crimping. The external device is plugged into the connector 4 via a matching plug, thereby establishing electrical connection between the external device and the connector 4. The battery device of this application simplifies the internal structure of the battery device and improves the thermal management efficiency of the battery module 2 by separately arranging the battery module 2 and the power distribution unit 3 in the separated first mounting cavity 11 and second mounting cavity 12, and by immersion cooling of the battery module 2.This application also makes the control of the power distribution unit 3 and the battery module 2 more convenient by adopting an independent setting of the power distribution unit 3 and an external interface of the electrical connector 4, and simplifies the connection and installation process between the battery device and external equipment, thereby improving the overall maintenance efficiency and user operation convenience.

[0032] like Figure 2 As shown, in one embodiment, the housing 1 includes a first housing 13, a cover plate 14, and a second housing 15 disposed within the first housing 13. The cover plate 14 covers the second housing 15 so that the cover plate 14 and the second housing 15 enclose and form the first mounting cavity 11. The first housing 13 has the second mounting cavity 12.

[0033] In this embodiment, the housing 1 is designed to include a first housing 13, a second housing 15, and a cover plate 14. The second housing 15 and the cover plate 14 together enclose a first mounting cavity 11, and the first housing 13 has a second mounting cavity 12. This achieves physical isolation between the coolant area of ​​the battery module 2 and the electrical area of ​​the power distribution unit 3. This configuration allows the first mounting cavity 11 to form an independent and sealed coolant chamber, thereby reducing the risk of coolant leakage into the second mounting cavity 12 and affecting electrical components such as the power distribution unit 3. Furthermore, by using the second housing 15 and the cover plate 14 to jointly enclose the first mounting cavity 11, the installation, disassembly, and maintenance of the battery module 2 are facilitated. For example, when maintenance of the battery module 2 or the coolant is required, only the cover plate 14 needs to be opened and the interior of the second housing 15 needs to be accessed without interfering with the power distribution unit 3 within the first housing 13, thus greatly improving the reliability, safety, and maintainability of the battery device.

[0034] In one embodiment, the battery device further includes a battery management system (not shown), which is disposed in one of the first mounting cavity 11 and the second mounting cavity 12. The battery management system includes a battery management circuit board and a battery sampling component. The battery sampling component is electrically connected to the battery module 2, the battery management circuit board, and the power distribution unit 3, respectively. The battery sampling component is used to collect voltage signals and / or temperature signals of the battery module 2 and transmit the collected signals to the battery management circuit board. The battery management circuit board is used to control the battery module 2.

[0035] In this embodiment, the battery sampling component is configured to directly acquire key operating parameters from the battery module 2. The battery sampling component includes multiple voltage sampling units and a temperature sensor. The voltage sampling units measure the voltage of each individual battery cell 21 in real time, and the temperature sensor monitors the temperature distribution inside the battery module 2. The battery sampling component is electrically connected to the battery management circuit board via a communication interface or analog signal line, transmitting the acquired voltage or temperature data to the battery management circuit board for further processing. The battery sampling component is also electrically connected to the power distribution unit 3, allowing the battery management system to control the battery module 2 through the power distribution unit 3. For example, the battery management system can control relays or contactors to disconnect or connect the power supply to the battery module 2. By acquiring voltage signals, the battery sampling component can reflect the battery's state of charge and balance, preventing excessively high or low voltage that could damage the battery or cause safety accidents. By acquiring temperature signals, the battery sampling component can reflect the temperature state of the environment surrounding the battery, preventing excessively high ambient temperatures that could accelerate battery aging.

[0036] In this embodiment, the battery management system can collect the voltage and / or temperature signals of battery module 2 in real time and accurately, and transmit these operating parameters to the battery management circuit board for processing and analysis. This configuration allows the battery management system to comprehensively and accurately grasp the operating status and health condition of battery module 2. The battery management circuit board can effectively control and manage battery module 2 according to preset control commands, including but not limited to charge / discharge management, thermal management, and fault protection. This application improves the operational safety, reliability, and lifespan of the battery device by using a battery management system to monitor battery module 2 in real time, effectively avoiding potential risks caused by abnormal conditions such as overcharging, over-discharging, and excessive temperature of battery module 2, and ensuring stable operation of the battery device under complex operating conditions.

[0037] like Figure 2 , Figure 3 and Figure 6 As shown, in one embodiment, the battery device applied to the immersion battery further includes a plurality of battery separators 5, the battery module 2 includes a plurality of battery cells 21, at least one of the outer walls on both sides of the battery separator 5 is provided with at least one of the battery cells 21 between it and the inner wall of the second housing 15, at least one of the outer walls on both sides of the battery separator 5 and the outer wall of the battery cell 21 are configured to form a first heat exchange channel 51 and a second heat exchange channel 52, the first heat exchange channel 51 is arranged along the length direction of the battery separator 5, and the second heat exchange channel 52 is arranged along the height direction of the battery separator 5, the first heat exchange channel 51 and the second heat exchange channel 52 are configured to supply coolant flow.

[0038] In this embodiment, the present application employs a first heat exchange channel 51 and a second heat exchange channel 52 that are interconnected between the battery separator 5 and the outer wall of the battery cell 21. The first heat exchange channel 51 is arranged along the length direction of the battery separator 5, and the second heat exchange channel 52 is arranged along the height direction of the battery separator 5. This allows the coolant to flow in different directions and efficiently dissipate the heat from the battery cell 21, effectively solving the problems of uneven temperature distribution, local overheating, and shortened lifespan caused by the low heat dissipation efficiency of traditional battery separators 5. This improves the heat dissipation efficiency of the battery device, makes the temperature distribution of the battery device more uniform, reduces the risk of local overheating of the battery device, extends the service life of the battery device, and improves the reliability of the battery device.

[0039] like Figure 2 As shown, in one embodiment, the battery device applied to the submersible battery further includes a lead wire seat 6 and a sealing ring 7. The lead wire seat 6 is disposed on the second housing 15. The lead wire seat 6 includes a base 61 and a plurality of lead wire posts 62 disposed on the base 61. The lead wire posts 62 have lead wire holes 621. The sealing ring 7 is disposed in the lead wire holes 621. The wires of the battery module 2 pass through the lead wire holes 621 and are electrically connected to the power distribution unit 3. The sealing ring 7 is used to seal the connection between the wires of the battery module 2 and the lead wire holes 621.

[0040] In this embodiment, the present application employs a wire seat 6 mounted on the second housing 15. The wire seat 6 includes a base 61 and multiple wire posts 62 with wire holes 621, with the multiple wire posts 62 disposed on the base 61. The present application uses wire holes 621 to connect the first mounting cavity 11 and the second mounting cavity 12 respectively. The wires of the battery module 2 pass through the wire holes 621 and are electrically connected to the power distribution unit 3, facilitating the electrical connection between the battery module 2 in the first mounting cavity 11 and the power distribution unit 3 in the second mounting cavity 12. The present application also employs a sealing ring 7 disposed within the wire holes 621, thereby achieving a sealed connection between the wires of the battery module 2 and the wire holes 621, preventing coolant in the first mounting cavity 11 from flowing into the second mounting cavity 12.

[0041] In one embodiment, the battery device applied to the immersion battery further includes a liquid level detection device (not shown), which is disposed in the first mounting cavity 11 and electrically connected to the power distribution unit 3 through the lead wire seat 6. The liquid level detection device is used to detect the liquid level height of the coolant in the first mounting cavity 11.

[0042] In this embodiment, a liquid level detection device is installed in the battery device. This device is positioned within the first mounting cavity 11, above the battery module 2, enabling real-time and accurate monitoring of the coolant level. The liquid level detection device is electrically connected to the power distribution unit 3 via a lead wire connector 6, ensuring that the liquid level signal measured by the device is stably transmitted to the power distribution unit 3. This configuration allows the power distribution unit 3 to promptly detect abnormal drops in the coolant level within the first mounting cavity 11, enabling rapid intervention measures such as replenishing coolant, issuing alarms, or limiting battery power output, effectively preventing the risk of overheating of the battery module 2 due to insufficient coolant.

[0043] like Figure 2 As shown, in one embodiment, the battery device applied to the immersion battery includes a pressure relief valve 8, the cover plate 14 has an inlet 141 for supplying coolant, the inlet 141 communicates with the first mounting cavity 11, the inlet 141 is located above the battery module 2, and the pressure relief valve 8 is detachably provided at the inlet 141 to allow gas in the mounting cavity to be discharged outside the housing 1.

[0044] In this embodiment, the pressure relief valve 8 is detachably installed at the liquid inlet 141, allowing the user to add coolant by removing the pressure relief valve 8 and injecting coolant through the liquid inlet 141 located above the battery module 2. Air in the first mounting cavity 11 can also be effectively discharged through the liquid inlet 141, preventing air blockage and bubble formation, and ensuring that the coolant fully wets the battery module 2. Specifically, under normal operating conditions, the pressure relief valve 8 is installed at the liquid inlet 141. When the coolant in the first mounting cavity 11 expands due to temperature increase or generates gas, causing excessive pressure, the pressure relief valve 8 automatically opens and discharges excess gas outside the housing 1, thereby reducing the pressure inside the first mounting cavity 11. This protects the housing 1 and battery module 2 from overpressure damage, significantly improving the operational safety and reliability of the battery device.

[0045] like Figure 2 As shown, in one embodiment, the electrical connector 4 has a plurality of first connecting portions 41 on the side away from the second mounting cavity 12, and a plurality of second connecting portions 42 on the side of the electrical connector 4 close to the second mounting cavity 12. The electrical connector 4 is electrically connected to the power distribution unit 3 through the plurality of second connecting portions 42, and the first connecting portions 41 are used for electrical connection to external devices.

[0046] In this embodiment, the plurality of first connecting parts 41 and the plurality of second connecting parts 42 can be respectively configured as wire interfaces. The plurality of first connecting parts 41 are located on the side of the electrical connector 4 away from the second mounting cavity 12, enabling the battery device to be plugged and unplugged with external devices through the plurality of first connecting parts 41, making it easier to install and remove the battery device. The plurality of second connecting parts 42 are located on the side of the electrical connector 4 close to the second mounting cavity 12, so that the electrical connector 4 can be electrically connected to the power distribution unit 3 through the plurality of second connecting parts 42, effectively reducing the risk of internal wiring failure of the battery device and simplifying the assembly and maintenance process of the battery device.

[0047] like Figure 4 and Figure 5 As shown, in one embodiment, the battery device applied to the immersion battery further includes a mounting bracket 9, which is disposed in the first mounting cavity 11. The mounting bracket 9 has a plurality of mounting holes 91. The battery module 2 includes a plurality of battery cells 21, and the plurality of battery cells 21 are inserted one-to-one into the plurality of mounting holes 91.

[0048] In this embodiment, the multiple battery cells 21 can be cylindrical in shape. This application improves the stability of the connection between the battery cells 21 and the mounting frame 9 by providing a mounting bracket 9 within the first mounting cavity 11 and by inserting the battery cells 21 one-to-one into the mounting holes 91 of the mounting bracket 9. Specifically, the mounting bracket 9 provides precise positioning and reliable support for each battery cell 21, ensuring that the battery cell 21 maintains its preset position even under vibration or impact conditions during battery device operation, thereby significantly improving the structural stability and reliability of the battery module 2. The uniform and controllable spacing between each battery cell 21 facilitates the formation of an efficient flow path for the coolant around the battery cells 21, thereby optimizing the heat dissipation performance of the battery module 2, helping to maintain the battery cells 21 within their optimal operating temperature range, and extending battery life.

[0049] like Figure 2 As shown, in one embodiment, the battery device applied to the immersion battery further includes a support member 92, which is mounted on the battery module 2 and located above the battery module 2. The support member 92 has a support portion 93 protruding on the side opposite to the battery module 2. The support member 92 abuts against the cover plate 14 through the support portion 93, so that an installation gap is formed between the cover plate 14 and the battery module 2.

[0050] In this embodiment, an installation gap is formed between the cover plate 14 and the battery module 2 to ensure a non-contact space between them. The support member 92 abuts against the cover plate 14 via the support portion 93, thereby forming an installation gap between the top of the battery module 2 and the cover plate 14. This ensures that the installation gap can stably and persistently maintain a preset size under operating conditions, and the size of the installation gap can be precisely adjusted by adjusting the height of the support member 92 or the support portion 93. The installation gap can accommodate the slight expansion that may occur during charging and discharging of the battery module 2, avoiding compressive stress between the battery module 2 and the cover plate 14. The installation gap also provides space for heat dissipation at the top of the battery module 2, allowing air or coolant to flow above the battery module 2, thereby improving the overall heat dissipation effect of the battery module 2.

[0051] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A battery device for use in an immersion battery, characterized in that, include: The housing has a first mounting cavity and a second mounting cavity that are separated from each other. The second mounting cavity has an opening that communicates with the outside. The first mounting cavity is filled with coolant. A battery module is disposed in the first mounting cavity, and at least a portion of the battery module is immersed in the coolant; A power distribution unit is located in the second mounting cavity, and the power distribution unit is electrically connected to the battery module via a wire. An electrical connector is provided at the opening, one end of which is electrically connected to the power distribution unit, and the other end of which is used for electrical connection to external devices.

2. The battery device applied to an immersion battery as described in claim 1, characterized in that, The housing includes a first housing, a cover plate, and a second housing disposed within the first housing. The cover plate covers the second housing so that the cover plate and the second housing enclose and form the first mounting cavity. The first housing has the second mounting cavity.

3. The battery device applied to an immersion battery as described in claim 2, characterized in that, The battery device applied to the immersion battery further includes a battery management system, which is located in one of the first mounting cavity and the second mounting cavity. The battery management system includes a battery management circuit board and a battery sampling component. The battery sampling component is electrically connected to the battery module, the battery management circuit board and the power distribution unit, respectively. The battery sampling component is used to collect the voltage signal and / or temperature signal of the battery module and transmit the collected signal to the battery management circuit board. The battery management circuit board is used to control the battery module.

4. The battery device applied to an immersion battery as described in claim 2, characterized in that, The battery device applied to the immersion battery further includes multiple battery separators, the battery module includes multiple battery cells, at least one of the outer walls on both sides of the battery separator is disposed between the battery cell and the inner wall of the second housing, at least one of the outer walls on both sides of the battery separator and the outer wall of the battery cell are configured to form a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is arranged along the length direction of the battery separator, the second heat exchange channel is arranged along the height direction of the battery separator, and the first heat exchange channel and the second heat exchange channel are configured to supply coolant flow.

5. The battery device applied to an immersion battery as described in claim 2, characterized in that, The battery device applied to the submersible battery further includes a lead wire seat and a sealing ring. The lead wire seat is disposed on the second housing. The lead wire seat includes a base and a plurality of lead wire posts disposed on the base. The lead wire posts have lead wire holes. The sealing ring is disposed in the lead wire holes. The wires of the battery module pass through the lead wire holes and are electrically connected to the power distribution unit. The sealing ring is used to seal the connection between the wires of the battery module and the lead wire holes.

6. The battery device applied to an immersion battery as described in claim 5, characterized in that, The battery device applied to the immersion battery also includes a liquid level detection device, which is disposed in the first mounting cavity. The liquid level detection device is electrically connected to the power distribution unit through the wire seat, and is used to detect the liquid level height of the coolant in the first mounting cavity.

7. The battery device for use in an immersion battery as described in claim 6, characterized in that, The battery device applied to the immersion battery includes a pressure relief valve, the cover plate has an inlet for supplying coolant, the inlet is connected to the first mounting cavity, the inlet is located above the battery module, and the pressure relief valve is detachably disposed at the inlet to allow gas in the mounting cavity to be discharged outside the housing.

8. The battery device for use in an immersion battery as described in claim 1, characterized in that, The electrical connector has multiple first connection portions on the side away from the second mounting cavity and multiple second connection portions on the side close to the second mounting cavity. The electrical connector is electrically connected to the power distribution unit through the multiple second connection portions, and the first connection portions are used for electrical connection to external devices.

9. The battery device for use in an immersion battery as described in claim 4, characterized in that, The battery device applied to the immersion battery further includes a mounting bracket disposed within the first mounting cavity. The mounting bracket has multiple mounting holes, and multiple battery cells are inserted one-to-one into the multiple mounting holes.

10. The battery device applied to an immersion battery as described in claim 2, characterized in that, The battery device applied to the immersion battery also includes a support member, which is mounted on the battery module and located above the battery module. The support member has a support portion protruding on the side opposite to the battery module, and the support member abuts against the cover plate through the support portion, so that an installation gap is formed between the cover plate and the battery module.

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