Battery box and battery pack

Abstract

The utility model provides a kind of battery box and battery pack, comprising: box, be equipped with liquid inlet, box has accommodating space, liquid inlet is communicated with accommodating space, for transmitting immersion liquid to accommodating space;Supporting member, installation is in box, supporting member is used to support battery, so that battery and the bottom plate of box form the gap for cooling liquid to flow between;Liquid cooling plate, as the bottom plate of box;Or, liquid cooling plate is connected to the outside of the bottom plate of box. By adopting liquid cooling plate and immersion liquid cooperation, form double cooling effect, greatly improve the cooling efficiency of battery module, effectively control battery temperature.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery boxes and battery packs. Background Technology

[0002] Currently, common battery cooling methods mainly include air cooling and liquid cooling. Air cooling uses air as a cooling medium, forcing airflow through devices such as fans to carry away the heat generated by the battery. However, air cooling has significant limitations: air has a low thermal conductivity, resulting in limited heat dissipation efficiency, making it difficult to meet the heat dissipation requirements of high-energy-density battery packs and higher charge / discharge rates.

[0003] Liquid cooling offers higher heat dissipation efficiency compared to air cooling and is gradually becoming the mainstream heat dissipation technology. Most existing liquid cooling solutions involve placing a liquid cooling plate inside the battery compartment. The plate has cooling channels within it, where the coolant circulates, absorbing the heat generated by the battery and carrying it out of the battery compartment, thus cooling the battery. However, this traditional liquid cooling method still has some shortcomings in practical applications. For example, the contact area between the liquid cooling plate and the battery is limited, only cooling a portion of the battery's surface. This prevents the coolant from achieving full and sufficient contact with the battery, resulting in uneven heat transfer within the battery, leading to localized overheating and affecting the overall performance and safety of the battery. Utility Model Content

[0004] The present invention provides a battery box and battery pack, which, by using a combination of liquid cooling plate and immersion liquid, forms a dual cooling effect, greatly improving the cooling efficiency of the battery cell module and effectively controlling the battery cell temperature.

[0005] In a first aspect, embodiments of this application provide a battery box, comprising: a box body having an inlet and an outlet, the box body having a receiving space, the inlet communicating with the receiving space for conveying immersion liquid into the receiving space; a support member installed inside the box body for supporting the battery, such that a gap is formed between the battery and the bottom plate of the box body for the immersion liquid to flow through; and a liquid cooling plate serving as the bottom plate of the box body; or, the liquid cooling plate being connected to the outside of the bottom plate of the box body.

[0006] Understandably, immersion liquid is injected into the box through the liquid inlet provided on the box. Because the support components create a gap between the battery and the bottom plate of the box for the immersion liquid to flow through, the immersion liquid can enter this gap area.

[0007] The immersion liquid entering the interval area will come into contact with the bottom of the cell module. As the immersion liquid continues to flow and circulate, it can gradually cover more parts of the cell module, achieving full immersion contact.

[0008] Once the immersion fluid completely submerges the battery cell module, the heat generated during charging and discharging is rapidly transferred to the immersion fluid. During circulation, the immersion fluid eventually exits through the outlet holes on the casing, carrying the heat out of the casing and effectively reducing the temperature of the battery cell module, thus achieving cooling.

[0009] In the above embodiments, the liquid cooling plate adds an additional cooling path. In addition to the direct cooling of the cell module by the immersion liquid, the liquid cooling plate can absorb and remove the heat conducted by the immersion liquid through the circulation of coolant in the internal cooling channel, forming a dual cooling effect, which greatly improves the cooling efficiency of the cell module and effectively controls the cell temperature.

[0010] On the other hand, because the support components create a gap between the battery and the bottom plate of the casing for coolant to flow, the immersion liquid can contact the bottom of the cell module to the maximum extent. This allows the heat generated by the cell module to be transferred more fully to the immersion liquid, and then the heat is carried out of the casing through the circulation of the immersion liquid, effectively reducing the temperature of the cell module and meeting the heat dissipation requirements of higher energy density battery packs and higher charge and discharge rates.

[0011] Optionally, the liquid outlet can be positioned above the battery module to ensure that the immersion liquid can completely submerge the battery module before flowing out, thus ensuring that all parts of the battery cell module are adequately cooled and improving heat dissipation and temperature uniformity.

[0012] In some embodiments, the support includes a mounting plate, which is mounted on a base plate, forming a gap between the mounting plate and the base plate. The mounting plate is provided with a plurality of flow holes, which connect the spaces on both sides of the mounting plate.

[0013] Understandably, there is a certain gap between the mounting plate and the inner end face of the base plate, and the mounting plate is provided with multiple flow holes. The immersion liquid entering the gap area will flow upward through these flow holes and then flow into the bottom of the battery cell module installed on the end face of the mounting plate opposite to the base plate.

[0014] There is a gap between the mounting plate and the inner end face of the bottom plate of the enclosure, and the mounting plate is provided with multiple flow holes, which optimizes the flow path of the immersion liquid, enabling the immersion liquid to be more evenly distributed and act on the cell module, thus improving the cooling efficiency.

[0015] In some embodiments, the support member further includes a support plate connected between the mounting plate and the base plate.

[0016] Understandably, the support plate ensures stable installation between the mounting plate and the base plate.

[0017] In some embodiments, the support plate includes a plurality of sub-plates, which are arranged side by side at even intervals.

[0018] Understandably, multiple sub-plates can ensure the uniformity of the spacing between the mounting plate and the base plate, which is beneficial for the even distribution and smooth flow of the immersion liquid in the space between the mounting plate and the base plate.

[0019] In some embodiments, multiple flow holes are distributed in a rectangular array on the mounting plate.

[0020] Understandably, the rectangular array distribution ensures that the flow holes are neatly distributed and evenly spaced on the mounting plate, allowing the immersion liquid to flow out from each flow hole at a similar flow rate and velocity, thus guaranteeing that different positions of the battery cell module can obtain a sufficient and uniform supply of cooling medium.

[0021] In some embodiments, the flow passage is a strip-shaped hole.

[0022] Understandably, because the flow orifice is designed as a strip shape, when the immersion liquid flows out from the flow orifice, the strip shape of the liquid outlet can better conform to the direction of the gaps between the battery cells. The immersion liquid can flow more smoothly and evenly into the gaps between the battery cells along the direction guided by the strip flow orifice, and then diffuse along these gaps inside the battery cell module, gradually achieving full immersion of all parts of the battery cell module, thereby carrying away the heat generated during the charging and discharging process of the battery cells.

[0023] In some embodiments, the support plate includes a plurality of sub-plates, each of which has a length direction perpendicular to the length direction of the flow hole.

[0024] Understandably, the length of each subplate is perpendicular to the length of the flow hole. This layout allows the support subplates to provide stable support for the mounting plate while minimizing excessive obstruction to the flow of the immersion liquid from the flow hole, enabling the immersion liquid to flow upwards relatively smoothly along the direction of the flow hole.

[0025] In some embodiments, the battery box further includes a liquid inlet pipe disposed inside the box, one end of which is connected to a liquid inlet hole, the other end of which is connected to a mounting plate and extends between the mounting plate and the base plate.

[0026] Understandably, immersion fluid is injected into the enclosure through the inlet port on the enclosure. The fluid enters via an inlet pipe, which connects to the inlet port at one end and to the mounting plate at the other, extending to the gap between the mounting plate and the bottom plate of the enclosure. Therefore, the immersion fluid first enters this gap, immersing the battery cell module from the bottom and gradually covering more parts of the module through circulation, achieving complete immersion contact. This cooling method allows the heat generated by the battery cell module to be more fully transferred to the immersion fluid, which then carries the heat out of the enclosure through circulation, effectively reducing the temperature of the battery cell module.

[0027] In some embodiments, one end of the inlet pipe is connected to the inlet hole, and the other end is divided into a first inlet branch pipe and a second inlet branch pipe. The first inlet branch pipe and the second inlet branch pipe are respectively connected to opposite sides of the mounting plate and extend to the space between the mounting plate and the base plate.

[0028] Understandably, during the operation of the liquid cooling chamber, the first and second inlet branch pipes are connected to opposite sides of the mounting plate and extend to the gap between the mounting plate and the bottom plate of the chamber. This allows the immersion liquid to simultaneously enter this gap from both sides of the mounting plate. Then, under pressure, the immersion liquid flows upwards from the evenly distributed flow holes on the mounting plate and into the bottom of the battery cell module mounted on the mounting plate, achieving immersion cooling of the battery cell module.

[0029] By introducing immersion fluid from both sides of the mounting plate simultaneously, the immersion fluid can fill the gap between the mounting plate and the base plate more quickly and evenly. This ensures that the flow rate and velocity of the immersion fluid flowing out from each flow hole are more consistent, improving the consistency of the cooling effect. Furthermore, the simultaneous introduction of fluid from both sides shortens the filling time of the immersion fluid in the gap between the mounting plate and the base plate, accelerates the circulation speed of the immersion fluid in the tank, and enhances the cooling efficiency.

[0030] In some embodiments, the liquid cooling housing further includes a liquid outlet pipe disposed within the housing, one end of which is connected to a liquid outlet hole, and the other end is suspended within the housing and flush with the liquid outlet hole.

[0031] Understandably, during normal operation of the liquid-cooled enclosure, the immersion liquid flows into the area between the mounting plate and the bottom plate of the enclosure through the inlet pipe, and then flows upward through the flow holes on the mounting plate, immersing the battery cell module to absorb the heat generated by the charging and discharging of the battery cells. As heat exchange continues, the immersion liquid, having absorbed heat, gradually rises, forming natural convection within the enclosure. At this point, the heated immersion liquid is guided into the outlet pipe by the suspended end of the outlet pipe, and finally flows out of the enclosure through the outlet hole, completing the heat exchange cycle. New low-temperature immersion liquid is continuously replenished into the enclosure, continuously cooling the battery cell module.

[0032] The design of suspending the liquid outlet pipe inside the chamber and flush with the liquid outlet hole provides an outlet channel for the immersion liquid that rises to the top of the chamber after the temperature increases, allowing the immersion liquid after heat exchange to flow out of the chamber quickly and orderly, thus improving the circulation efficiency of the cooling medium.

[0033] In some embodiments, one end of the liquid outlet pipe is connected to the liquid outlet hole, and the other end is divided into a first liquid outlet branch pipe and a second liquid outlet branch pipe. The first liquid outlet branch pipe and the second liquid outlet branch pipe extend to opposite sides of the box body, are suspended in the box body, and are flush with the liquid outlet hole.

[0034] Understandably, the immersion liquid, after its temperature rises, will rise to both sides of the battery cell module under natural convection, and then enter the first and second outlet branch pipes. After being collected through the outlet pipes, it will flow out of the housing through the outlet hole, completing one heat exchange cycle.

[0035] By extending the first and second liquid outlet branches to the opposite sides of the battery cell module, the hot immersion liquid rising from both sides of the battery cell module can be collected more comprehensively, so that the heat generated in various parts of the battery cell module can be carried away in time, ensuring that the overall temperature distribution of the battery cell module is uniform and improving the uniformity of cooling.

[0036] In some embodiments, the liquid cooling plate has a cooling channel inside, and a coolant inlet and a coolant outlet are provided on the side of the liquid cooling plate opposite to the receiving space.

[0037] During charging and discharging, the battery module generates a significant amount of heat, which is transferred to the mounting plate it contacts and the immersion fluid within the enclosure. Coolant enters the liquid cooling plate through the coolant inlet. As it flows through the channels of the liquid cooling plate, it absorbs the heat conducted from the enclosure, thus lowering the plate's temperature. The heated coolant then exits the liquid cooling plate through the coolant outlet and returns to the external cooling system for further cooling. The cooled coolant is then pumped back into the liquid cooling plate, and this cycle continues, providing auxiliary cooling to the liquid-cooled enclosure.

[0038] In a second aspect, this application provides a battery pack, including the liquid-cooled housing described above; it also includes a cell module.

[0039] In some embodiments, the battery cell module is connected to the mounting plate via a mounting member, and there is a gap between the bottom side of the battery cell module and the mounting plate.

[0040] Understandably, because there is a gap between the bottom of the battery cell module and the mounting plate, the immersion liquid can smoothly enter this gap area, completely enveloping the bottom of the battery cell module and absorbing the heat generated by the battery cell module. After absorbing heat, the immersion liquid gradually rises and flows out of the tank through the outlet hole. New low-temperature immersion liquid is continuously replenished and enters, forming a continuous heat exchange cycle, thereby achieving effective cooling of the battery cell module.

[0041] In some embodiments, structural adhesive is provided between the bottom portion of the battery cell module and the mounting plate.

[0042] Understandably, the adhesive effect of structural adhesive can disperse the stress borne by the mounting components, improve the connection strength between the cell module and the mounting plate, and ensure the reliability of the overall battery pack structure.

[0043] In some embodiments, each flow passage is provided at the gap between two adjacent cells.

[0044] Understandably, since each flow-through orifice is located at the gap between two adjacent cells, the immersion fluid, after flowing out of the orifice, can directly and precisely flow into the gap between the cells. Subsequently, the immersion fluid flows along these gaps inside the cell module, gradually covering all surfaces of the cells, achieving complete immersion of the cell module. When the cell module generates heat during charging and discharging, the heat is quickly transferred to the immersion fluid in full contact with it. The immersion fluid carries the heat out of the housing during circulation, completing the cooling process.

[0045] This design allows the immersion fluid to act directly on the key heat dissipation areas between the cells, improving the utilization efficiency of the immersion fluid and enabling the cooling medium to more accurately and quickly remove the heat generated by the cells, thereby significantly improving the cooling effect.

[0046] In some embodiments, the flow passage is a strip-shaped hole, and the length direction of the flow passage is parallel to the gap.

[0047] Understandably, because the flow-through orifice is designed as a strip shape, and its length is parallel to the gap between adjacent cells, when the immersion liquid flows out from the orifice, the strip-shaped liquid outlet pattern can better conform to the direction of the cell gap. The immersion liquid can flow more smoothly and evenly into the gap between the cells along the direction guided by the strip-shaped flow-through orifice, and then diffuse along these gaps inside the cell module, gradually achieving complete immersion of all parts of the cell module, thereby carrying away the heat generated during the charging and discharging process of the cells.

[0048] In some embodiments, the mounting component includes two oppositely arranged mounting bases connected to a mounting plate, and the battery cell module is bound between the two mounting bases by a steel strap.

[0049] Understandably, the installation method of using two opposing mounting bases with steel straps provides multi-directional constraint on the battery cell module. The binding effect of the steel straps prevents the battery cell module from shifting horizontally, while the connection between the mounting base and the mounting plate restricts the movement of the battery cell module vertically, keeping the battery cell module in a stable position and reducing the probability of internal connections loosening due to battery cell module shaking.

[0050] The beneficial effects of the embodiments of this utility model are as follows:

[0051] In the embodiments of this utility model, by using a liquid cooling plate in conjunction with an immersion liquid, in addition to the direct cooling of the battery cell module by the immersion liquid, the liquid cooling plate can absorb and carry away the heat conducted by the immersion liquid through the circulation of the coolant in the internal cooling channel, forming a dual cooling effect, which greatly improves the cooling efficiency of the battery cell module and effectively controls the battery cell temperature.

[0052] Because the support components create a gap between the battery and the bottom plate of the casing for coolant flow, the immersion liquid can contact the bottom of the cell module to the maximum extent. This allows the heat generated by the cell module to be transferred more fully to the immersion liquid, and then the heat is carried out of the casing through the circulation of the immersion liquid, effectively reducing the temperature of the cell module and meeting the heat dissipation requirements of higher energy density battery packs and higher charge and discharge rates. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the overall structure of the battery box provided in the embodiments of this application;

[0055] Figure 2 This is an exploded schematic diagram of the battery box provided in an embodiment of this application;

[0056] Figure 3 This is a schematic diagram of the internal structure of the battery box provided in the embodiments of this application.

[0057] Figure 4 This is a schematic diagram of the overall structure of the battery pack provided in the embodiments of this application;

[0058] Figure 5 This is a schematic diagram of the internal structure of the battery pack housing provided in the embodiments of this application;

[0059] In the diagram: 1. Box body; 11. Liquid inlet; 12. Liquid outlet;

[0060] 2. Mounting plate; 21. Flow hole;

[0061] 3. Support plate; 31. Sub-plate;

[0062] 4. Mounting components; 41. Mounting bracket;

[0063] 5. Battery cell module;

[0064] 6. Inlet pipe; 61. First inlet branch pipe; 62. Second inlet branch pipe;

[0065] 7. Outlet pipe; 71. First outlet branch pipe; 72. Second outlet branch pipe;

[0066] 8. Liquid cooling plate; 81. Coolant inlet; 82. Coolant outlet. Detailed Implementation

[0067] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0068] Currently, common battery cooling methods mainly include air cooling and liquid cooling. Air cooling uses air as a cooling medium, forcing airflow through devices such as fans to carry away the heat generated by the battery. However, air cooling has significant limitations: air has a low thermal conductivity, resulting in limited heat dissipation efficiency, making it difficult to meet the heat dissipation requirements of high-energy-density battery packs and higher charge / discharge rates.

[0069] Liquid cooling offers higher heat dissipation efficiency compared to air cooling and is gradually becoming the mainstream heat dissipation technology. Most existing liquid cooling solutions involve placing a liquid cooling plate inside the battery compartment. The plate has cooling channels within it, where the coolant circulates, absorbing the heat generated by the battery and carrying it out of the battery compartment, thus cooling the battery. However, this traditional liquid cooling method still has some shortcomings in practical applications. For example, the contact area between the liquid cooling plate and the battery is limited, only cooling a portion of the battery's surface. This prevents the coolant from achieving full and sufficient contact with the battery, resulting in uneven heat transfer within the battery, leading to localized overheating and affecting the overall performance and safety of the battery.

[0070] Regarding the above technical issues, firstly, refer to Figures 1 to 3 This application provides a battery box, including: a box body 1, with an inlet hole 11 and an outlet hole 12, the box body 1 having a receiving space, the inlet hole 11 communicating with the receiving space for transmitting immersion liquid into the receiving space; a support member installed inside the box body 1, the support member being used to support the battery, so that a gap is formed between the battery and the bottom plate of the box body 1 for the immersion liquid to flow through; a liquid cooling plate 8, serving as the bottom plate of the box body 1; or, the liquid cooling plate 8 is connected to the outside of the bottom plate of the box body 1.

[0071] Understandably, immersion liquid is injected into the inside of the housing 1 through the liquid inlet 11 provided on the housing 1. Since the support component creates a gap between the battery and the bottom plate of the housing 1 for the immersion liquid to flow through, the immersion liquid can enter this gap area.

[0072] The immersion liquid entering the interval area will come into contact with the bottom of the cell module 5. As the immersion liquid continues to flow and circulate, it can gradually cover more parts of the cell module 5, achieving full immersion contact.

[0073] Once the immersion liquid completely submerges and contacts the battery cell module 5, the heat generated by the battery cell module 5 during charging and discharging will be rapidly transferred to the immersion liquid. During the circulation process, the immersion liquid will eventually be discharged from the outlet hole 12 provided on the housing 1, carrying the heat out of the housing 1, thereby effectively reducing the temperature of the battery cell module 5 and achieving cooling of the battery cell module 5.

[0074] In the above embodiments, the liquid cooling plate 8 adds an additional cooling path. In addition to the direct cooling of the cell module 5 by the immersion liquid, the liquid cooling plate 8 can absorb and carry away the heat conducted by the immersion liquid through the circulation of the coolant in the internal cooling channel, forming a dual cooling effect, which greatly improves the cooling efficiency of the cell module 5 and effectively controls the cell temperature.

[0075] On the other hand, because the support component creates a gap between the battery and the bottom plate of the housing 1 for coolant to flow, the immersion liquid can contact the bottom of the cell module 5 to the maximum extent, thereby enabling the heat generated by the cell module 5 to be more fully transferred to the immersion liquid. Then, the heat is carried out of the housing 1 through the circulation of the immersion liquid, effectively reducing the temperature of the cell module 5 and meeting the heat dissipation requirements of higher energy density battery packs and higher charge and discharge rates.

[0076] Optionally, the liquid outlet 12 is positioned above the battery module 5 to ensure that the immersion liquid can completely submerge the battery module 5 before flowing out, thus ensuring that all parts of the battery module 5 can be adequately cooled and improving heat dissipation and temperature uniformity.

[0077] In some embodiments, reference Figure 2 , Figure 3 The support includes a mounting plate 2, which is mounted on the base plate. A gap is formed between the mounting plate 2 and the base plate. The mounting plate 2 is provided with multiple flow holes 21, which connect the spaces on both sides of the mounting plate 2.

[0078] Understandably, there is a certain gap between the mounting plate 2 and the inner end face of the base plate, and the mounting plate 2 is provided with multiple flow holes 21. The immersion liquid entering the gap area will flow upward from these flow holes 21 and then flow into the bottom of the battery cell module 5 installed on the end face of the mounting plate 2 opposite to the base plate.

[0079] There is a gap between the mounting plate 2 and the inner end face of the bottom plate of the housing 1, and the mounting plate 2 is provided with multiple flow holes 21, which optimizes the flow path of the immersion liquid, enables the immersion liquid to be more evenly distributed and act on the cell module 5, and improves the cooling efficiency.

[0080] In some embodiments, reference Figure 2 The support also includes a support plate 3, which is connected between the mounting plate 2 and the base plate.

[0081] Understandably, the support plate 3 ensures stable installation between the mounting plate 2 and the base plate.

[0082] In some embodiments, reference Figure 2 , Figure 3 The support plate 3 includes multiple sub-plates 31, which are evenly spaced and arranged side by side.

[0083] Understandably, multiple sub-plates 31 can ensure the uniformity of the spacing between the mounting plate 2 and the base plate, which is beneficial for the uniform distribution and smooth flow of the immersion liquid in the space between the mounting plate 2 and the base plate.

[0084] In some embodiments, reference Figure 2 , Figure 3 Multiple flow holes 21 are distributed in a rectangular array on the mounting plate 2.

[0085] Understandably, the rectangular array distribution makes the flow holes 21 neatly distributed and evenly spaced on the mounting plate 2, so that the immersion liquid can flow out from each flow hole 21 at a similar flow rate and velocity, ensuring that the battery cell module 5 can obtain a sufficient and uniform supply of cooling medium at different locations.

[0086] In some embodiments, reference Figure 2 , Figure 3 The flow passage 21 is a strip-shaped hole.

[0087] Understandably, since the flow-through orifice 21 is designed as a strip-shaped orifice, when the immersion liquid flows out from the flow-through orifice 21, the strip-shaped liquid outlet pattern can better conform to the direction of the gaps between the battery cells. The immersion liquid can flow more smoothly and evenly into the gaps between the battery cells along the direction guided by the strip-shaped flow-through orifice 21, and then diffuse along these gaps inside the battery cell module 5, gradually achieving full immersion of all parts of the battery cell module 5, thereby carrying away the heat generated during the charging and discharging process of the battery cells.

[0088] In some embodiments, reference Figure 2 The support plate 3 includes multiple sub-plates 31, and the length direction of each sub-plate 31 is perpendicular to the length direction of the flow hole 21.

[0089] Understandably, the length direction of each sub-plate 31 is perpendicular to the length direction of the flow hole 21. This arrangement allows the sub-plates 31 to provide stable support for the mounting plate 2 while minimizing excessive obstruction to the flow of the immersion liquid from the flow hole 21, enabling the immersion liquid to flow upwards relatively smoothly along the direction of the flow hole 21.

[0090] In some embodiments, reference Figure 3 The battery box also includes an inlet pipe 6 located inside the box body 1. One end of the inlet pipe 6 is connected to the inlet hole 11, and the other end is connected to the mounting plate 2, extending to the space between the mounting plate 2 and the base plate.

[0091] Understandably, immersion liquid is injected into the housing 1 through the liquid inlet 11 provided on the housing 1. The immersion liquid enters through the liquid inlet pipe 6. Since one end of the liquid inlet pipe 6 is connected to the liquid inlet 11 and the other end is connected to the mounting plate 2 and extends to the gap area between the mounting plate 2 and the bottom plate of the housing 1, the immersion liquid first enters this gap area, allowing the immersion liquid to immerse the battery cell module 5 from the bottom, and gradually cover more parts of the battery cell module 5 with circulation, achieving full immersion contact. This cooling method allows the heat generated by the battery cell module 5 to be more fully transferred to the immersion liquid, and then the heat is carried out of the housing 1 through the circulation of the immersion liquid, effectively reducing the temperature of the battery cell module 5.

[0092] In some embodiments, reference Figure 3 One end of the liquid inlet pipe 6 is connected to the liquid inlet hole 11, and the other end is divided into a first liquid inlet branch pipe 61 and a second liquid inlet branch pipe 62. The first liquid inlet branch pipe 61 and the second liquid inlet branch pipe 62 are respectively connected to the opposite sides of the mounting plate 2 and extend to the space between the mounting plate 2 and the base plate.

[0093] Understandably, during the operation of the liquid cooling chamber, the first liquid inlet branch pipe 61 and the second liquid inlet branch pipe 62 are respectively connected to the opposite sides of the mounting plate 2 and extend to the gap area between the mounting plate 2 and the bottom plate of the chamber 1. In this way, the immersion liquid can enter the gap area simultaneously from both sides of the mounting plate 2. Then, under pressure, the immersion liquid will flow upward from the evenly distributed flow holes 21 on the mounting plate 2, and then flow into the bottom of the battery cell module 5 mounted on the mounting plate 2, thereby achieving immersion cooling of the battery cell module 5.

[0094] By introducing immersion liquid from both sides of the mounting plate 2 simultaneously, the immersion liquid can fill the gap between the mounting plate 2 and the bottom plate more quickly and evenly, thereby ensuring that the flow rate and velocity of the immersion liquid flowing out from each flow hole 21 are more consistent, improving the consistency of the cooling effect. In addition, the method of introducing liquid from both sides at the same time shortens the filling time of the immersion liquid in the gap between the mounting plate 2 and the bottom plate, accelerates the circulation speed of the immersion liquid in the tank 1, and enhances the cooling efficiency.

[0095] In some embodiments, reference Figure 2 , Figure 3 The liquid cooling chamber also includes a liquid outlet pipe 7 located inside the chamber 1. One end of the liquid outlet pipe 7 is connected to the liquid outlet hole 12, and the other end is suspended inside the chamber 1 and flush with the liquid outlet hole 12.

[0096] Understandably, during normal operation of the liquid-cooled enclosure, the immersion liquid flows into the area between the mounting plate 2 and the bottom plate of the enclosure 1 through the inlet pipe 6, and then flows upward through the flow holes 21 on the mounting plate 2, immersing the battery cell module 5 to absorb the heat generated by the charging and discharging of the battery cells. As heat exchange continues, the immersion liquid, after absorbing heat, gradually rises, forming natural convection within the enclosure 1. At this time, the immersion liquid, after its temperature rises, is guided into the outlet pipe 7 by the suspended end of the outlet pipe 7, and finally flows out of the enclosure 1 through the outlet hole 12, completing the heat exchange cycle. New low-temperature immersion liquid is continuously replenished into the enclosure 1, continuously cooling the battery cell module 5.

[0097] By suspending the liquid outlet pipe 7 inside the housing 1 and making it flush with the liquid outlet hole 12, an outlet channel is provided for the immersion liquid that rises to the top of the housing 1 after the temperature increases, so that the immersion liquid after heat exchange can flow out of the housing 1 quickly and orderly, thereby improving the circulation efficiency of the cooling medium.

[0098] In some embodiments, reference Figure 2 , Figure 3 One end of the liquid outlet pipe 7 is connected to the liquid outlet hole 12, and the other end is divided into a first liquid outlet branch pipe 71 and a second liquid outlet branch pipe 72. The first liquid outlet branch pipe 71 and the second liquid outlet branch pipe 72 extend to opposite sides inside the box 1, are suspended inside the box 1, and are flush with the liquid outlet hole 12.

[0099] Understandably, the immersion liquid, after its temperature rises, will rise to both sides of the battery cell module under natural convection, and then enter the first and second outlet branch pipes. After being collected through the outlet pipes, it will flow out of the housing through the outlet hole, completing one heat exchange cycle.

[0100] By extending the first and second liquid outlet branches to the opposite sides of the battery cell module inside the housing 1, the hot immersion liquid rising from both sides of the battery cell module can be collected more comprehensively, so that the heat generated in each part of the battery cell module can be carried away in time, ensuring that the overall temperature distribution of the battery cell module is uniform and improving the uniformity of cooling.

[0101] In some embodiments, reference Figure 1 The liquid cooling plate 8 has a cooling channel inside, and a coolant inlet 81 and a coolant outlet 82 are provided on the side of the liquid cooling plate 8 away from the receiving space.

[0102] During charging and discharging, the battery module 5 generates a large amount of heat, which is transferred to the mounting plate 2 and the immersion liquid inside the housing 1. Coolant enters the liquid cooling plate 8 through the coolant inlet 81. As it flows through the channels of the liquid cooling plate 8, it absorbs the heat conducted from the housing 1, thus lowering its temperature. The heated coolant then flows out of the liquid cooling plate 8 through the coolant outlet 82 and returns to the external cooling system for further cooling. The cooled coolant is then pumped back into the liquid cooling plate 8, and this cycle continues, providing auxiliary cooling to the liquid-cooled housing.

[0103] The second aspect of this application, with reference to Figure 4 , Figure 5 A battery pack is provided, including the liquid-cooled housing described above; it also includes a cell module 5.

[0104] In some embodiments, the battery cell module 5 is connected to the mounting plate 2 via the mounting member 4, and there is a gap between the bottom side of the battery cell module 5 and the mounting plate 2.

[0105] Understandably, because there is a gap between the bottom of the battery cell module 5 and the mounting plate 2, the immersion liquid can smoothly enter this gap area, completely covering the bottom of the battery cell module 5 and absorbing the heat generated by the battery cell module 5. After absorbing heat, the immersion liquid gradually rises and flows out of the housing 1 through the liquid outlet 12. New low-temperature immersion liquid is continuously replenished and enters, forming a continuous heat exchange cycle, thereby achieving effective cooling of the battery cell module 5.

[0106] In some embodiments, structural adhesive is provided between the bottom portion of the battery cell module 5 and the mounting plate 2.

[0107] Understandably, the adhesive effect of the structural adhesive can disperse the stress borne by the mounting component 4, improve the connection strength between the cell module 5 and the mounting plate 2, and ensure the reliability of the overall battery pack structure.

[0108] In some embodiments, each flow passage 21 is provided at the gap between two adjacent cells.

[0109] Understandably, since each flow hole 21 is located at the gap between two adjacent cells, the immersion liquid, after flowing out from the flow hole 21, can directly and precisely flow into the gap between the cells. Subsequently, the immersion liquid flows along these gaps inside the cell module 5, gradually covering all surfaces of the cells, achieving complete immersion of the cell module 5. When the cell module 5 generates heat during charging and discharging, the heat is quickly transferred to the immersion liquid in full contact with it. The immersion liquid carries the heat out of the housing 1 during circulation, completing the cooling process.

[0110] This design allows the immersion fluid to act directly on the key heat dissipation areas between the cells, improving the utilization efficiency of the immersion fluid and enabling the cooling medium to more accurately and quickly remove the heat generated by the cells, thereby significantly improving the cooling effect.

[0111] In some embodiments, the flow passage 21 is a strip-shaped hole, and the length direction of the flow passage 21 is parallel to the gap.

[0112] Understandably, since the flow-through orifice 21 is designed as a strip-shaped orifice with its length parallel to the gap between adjacent cells, when the immersion liquid flows out from the flow-through orifice 21, the strip-shaped liquid outlet pattern can better conform to the direction of the cell gap. The immersion liquid can flow more smoothly and evenly into the gap between the cells along the direction guided by the strip-shaped flow-through orifice 21, and then diffuse along these gaps inside the cell module 5, gradually achieving full immersion of all parts of the cell module 5, thereby carrying away the heat generated during the charging and discharging process of the cells.

[0113] In some embodiments, reference Figure 5 The mounting component 4 includes two mounting seats 41 arranged opposite each other. The mounting seats 41 are connected to the mounting plate 2. The battery cell module 5 is bound between the two mounting seats 41 by a steel strap.

[0114] Understandably, the installation method of using two opposing mounting bases 41 with steel strap binding provides multi-directional constraint force for the battery cell module 5. The binding effect of the steel strap can prevent the battery cell module 5 from shifting in the horizontal direction, while the connection between the mounting base 41 and the mounting plate 2 can restrict the movement of the battery cell module 5 in the vertical direction, so that the battery cell module 5 can maintain a stable position and reduce the probability of loosening of internal connections due to shaking of the battery cell module 5.

[0115] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery box, characterized in that, include: The box (1) is provided with a liquid inlet (11), the box (1) has a receiving space, the liquid inlet (11) is connected to the receiving space, and is used to transfer immersion liquid into the receiving space; A support member is installed inside the housing (1). The support member is used to support the battery, so that a gap is formed between the battery and the bottom plate of the housing (1) for the flow of immersion liquid. The liquid cooling plate (8) serves as the bottom plate of the housing (1); or the liquid cooling plate (8) is connected to the outside of the bottom plate of the housing (1).

2. The battery box according to claim 1, characterized in that, The support includes a mounting plate (2), which is mounted on the base plate. The gap is formed between the mounting plate (2) and the base plate. The mounting plate (2) is provided with a plurality of flow holes (21), which connect the spaces on both sides of the mounting plate (2).

3. The battery box according to claim 2, characterized in that, The support also includes a support plate (3), which is connected between the mounting plate (2) and the base plate.

4. The battery box according to claim 3, characterized in that, The support plate (3) includes multiple sub-plates (31), which are evenly spaced and arranged side by side.

5. The battery box according to claim 2, characterized in that, The multiple flow holes (21) are arranged in a rectangular array on the mounting plate (2).

6. The battery box according to claim 2, characterized in that, The flow passage (21) is a strip-shaped hole.

7. The battery box according to claim 6, characterized in that, The support member includes a support plate (3), which includes a plurality of sub-plates (31), and the length direction of each sub-plate (31) is perpendicular to the length direction of the flow hole (21).

8. The battery box according to claim 2, characterized in that, It includes an inlet pipe (6) disposed in the housing (1), one end of the inlet pipe (6) is connected to the inlet hole (11), the other end is connected to the mounting plate (2), and extends to the space between the mounting plate (2) and the bottom plate.

9. The battery box according to claim 8, characterized in that, One end of the liquid inlet pipe (6) is connected to the liquid inlet hole (11), and the other end is divided into a first liquid inlet branch pipe (61) and a second liquid inlet branch pipe (62). The first liquid inlet branch pipe (61) and the second liquid inlet branch pipe (62) are respectively connected to the opposite sides of the mounting plate (2) and extend to the space between the mounting plate (2) and the base plate.

10. The battery box according to claim 1, characterized in that, The box (1) is provided with a liquid outlet (12); including a liquid outlet pipe (7) provided in the box (1), one end of the liquid outlet pipe (7) is connected to the liquid outlet (12), and the other end is suspended in the box (1).

11. The battery box according to claim 10, characterized in that, One end of the liquid outlet pipe (7) is connected to the liquid outlet hole (12), and the other end is divided into a first liquid outlet branch pipe (71) and a second liquid outlet branch pipe (72). The first liquid outlet branch pipe (71) and the second liquid outlet branch pipe (72) extend to opposite sides inside the box (1) and are suspended inside the box (1).

12. The battery box according to claim 1, characterized in that, The liquid cooling plate (8) has a cooling channel inside, and a coolant inlet (81) and a coolant outlet (82) are provided on the side of the liquid cooling plate (8) away from the receiving space.

13. A battery pack, characterized in that, It includes the battery box as described in any one of claims 1-12; and also includes a cell module (5).

14. The battery pack according to claim 13, characterized in that, The support includes a mounting plate (2), which is mounted on the base plate. The mounting plate (2) has multiple flow holes (21) that connect the spaces on both sides of the mounting plate (2). The battery cell module (5) is connected to the mounting plate (2) via a mounting component (4), and there is a gap between the bottom side of the battery cell module (5) and the mounting plate (2).

15. The battery pack according to claim 14, characterized in that, Structural adhesive is provided between the bottom part of the battery cell module (5) and the mounting plate (2).

16. The battery pack according to claim 14, characterized in that, Each of the aforementioned flow passages (21) is located at the gap between two adjacent cells.

17. The battery pack according to claim 16, characterized in that, The flow passage (21) is a strip-shaped hole, and the length direction of the flow passage (21) is parallel to the gap.

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