Box body for immersed battery pack, battery pack and vehicle

Abstract

The utility model belongs to the technical field of batteries, and discloses a box body for an immersed battery pack, the battery pack and a vehicle, the battery pack comprises the box body for the immersed battery pack and a battery cell group, the box body for the immersed battery pack comprises a shell, a first cooling piece and a second cooling piece, and an accommodating space is formed in the shell; the battery cell group is arranged in the accommodating space, the battery cell group comprises a plurality of battery cells, and a first flowing gap is formed between every two adjacent battery cells in the battery cell group; the first cooling piece and the second cooling piece are arranged on the two opposite sides of the containing space respectively in the height direction, a first heat dissipation flow channel and a first communication opening are formed in the first cooling piece, and a second heat dissipation flow channel and a second communication opening are formed in the second cooling piece; and in the height direction, any one battery cell or any one flow gap is arranged opposite to at least one first communication port, and any one battery cell or any one flow gap is arranged opposite to at least one second communication port. The box body for the immersed battery pack, the battery pack and the vehicle are good in temperature equalization performance.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a housing, battery pack, and vehicle for an immersion battery pack. Background Technology

[0002] With the development of new energy vehicle technology, users' demand for rapid battery replenishment is becoming increasingly urgent. A major way to improve replenishment speed is high-rate fast charging, with the highest rate currently reaching 5C in the industry. High-rate fast charging means an extremely large charging current, which causes an exponential increase in heat generation from cell winding and current-carrying components such as busbars within the battery pack, increasing the risk of cell overheating. In addition, as the energy density of battery cells gradually increases, the energy release from thermal runaway also increases significantly, further raising the demand for thermal safety protection.

[0003] Immersion cooling, as one method of cooling battery cells, involves immersing the battery cell in an insulating coolant, ensuring the cell is completely submerged. The coolant contacts and flows over the cell surface, carrying away heat dissipated by the cell and ultimately controlling battery temperature. Compared to traditional cold plate heat exchange, immersion cooling significantly improves heat exchange capacity due to the absence of intermediate heat exchange stages and the ability to fully immerse the cell, making it the most promising cooling method.

[0004] A related technology proposes a battery pack including a housing with a receiving cavity and a cell assembly located within the receiving cavity. The housing includes a first sidewall and a second sidewall located on both sides of the receiving cavity in a first direction. The cell assembly includes multiple cells arranged in multiple rows along a second direction, with a first gap formed between adjacent rows of cells. The second direction is perpendicular to the first direction and represents the length and width directions of the cells, respectively. The first and second sidewalls are respectively provided with inlet channels and outlet channels. The inlet channels include multiple inlet holes communicating with the receiving cavity, and the outlet channels include multiple outlet holes communicating with the receiving cavity. The multiple inlet holes and multiple outlet holes are correspondingly arranged on both sides of the multiple first gaps. After flowing out of the inlet channels, the coolant can cool the cells through each of the first gaps before flowing into the outlet channels, improving the temperature uniformity between rows of cells. However, for different cells in the same row, the temperature uniformity still needs to be improved due to the different flow order of the coolant. Moreover, even if any row of cells in the battery pack contains only one cell, the cooling effect of the coolant on the positive and negative electrodes of the same cell is different due to the different flow order of the coolant, resulting in poor temperature uniformity. Utility Model Content

[0005] The purpose of this utility model is to provide a housing, battery pack, and vehicle for an immersion battery pack, in order to solve the problem of poor temperature uniformity of battery cells.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A housing for an immersion battery pack is used to house a battery cell assembly, the battery cell assembly comprising a plurality of spaced-apart cells, with a first flow gap formed between adjacent cells in the battery cell assembly. The housing includes a shell, a first cooling element, and a second cooling element. A receiving space for accommodating the battery cell assembly is formed within the shell. The first cooling element and the second cooling element are disposed on opposite sides of the receiving space along the height direction of the housing. A first heat dissipation channel is formed inside the first cooling element, and a first communication port is provided on the first cooling element, connecting the first heat dissipation channel and the receiving space. A second heat dissipation channel is formed inside the second cooling element, and a second communication port is provided on the second cooling element, connecting the second heat dissipation channel and the receiving space. Along the height direction of the housing, any battery cell or any of the first flow gaps is disposed opposite to at least one of the first communication ports, and any battery cell or any of the first flow gaps is disposed opposite to at least one of the second communication ports.

[0008] Optionally, the second heat dissipation channel is spaced apart from the electrode post of the battery cell, and the second cooling element protrudes towards the battery cell assembly to form the second heat dissipation channel.

[0009] Optionally, the second communication port is disposed opposite to the explosion-proof valve of the battery cell.

[0010] Optionally, the first heat dissipation channel and / or the second heat dissipation channel have a symmetry axis extending along the arrangement direction of the cells in the cell group.

[0011] Optionally, the housing has openings at both the top and bottom, and the first cooling element and the second cooling element are both fixedly connected to the housing and respectively block the openings at opposite ends of the housing.

[0012] Optionally, the first cooling component is provided with a third connecting port that connects to the first heat dissipation channel, and the second cooling component is provided with a fourth connecting port that connects to the second heat dissipation channel. One of the third connecting port and the fourth connecting port is a liquid inlet and the other is a liquid outlet. The third connecting port and the fourth connecting port are respectively located on the opposing surfaces of the first cooling component and the second cooling component, and both the third connecting port and the fourth connecting port are located outside the accommodating space.

[0013] Optionally, the third connection port and the fourth connection port are located on the same side of the housing.

[0014] Optionally, the contact surface between the first cooling element and / or the second cooling element and the housing is a plane.

[0015] Optionally, the enclosure for the submersible battery pack further includes at least two electrical connectors, one end of which is electrically connected to the battery cell assembly, and the other end of which extends out of the receiving space, and the electrical connector is sealed to the housing.

[0016] A battery pack, comprising a cell assembly and a housing for an immersion battery pack as described above, wherein at least one set of the cell assembly is placed within the housing space.

[0017] Optionally, a second flow gap is formed between the battery cell assembly and the housing, and / or between the battery cell assembly and the second cooling element, and / or between the battery cell assembly and the first cooling element.

[0018] Optionally, the battery pack further includes a spacer structure disposed within the second flow gap to adjust the volume of the second flow gap.

[0019] A means of transportation, the means of transportation including the aforementioned battery pack.

[0020] The beneficial effects of this utility model are:

[0021] In the immersion battery pack housing, battery pack, and vehicle proposed in this utility model, the coolant flowing into the containment space is diverted by the reasonable arrangement of the first and second connecting ports, thereby achieving a uniform distribution of coolant flow among the battery cells located in the containment space and high temperature uniformity of the battery cells. Attached Figure Description

[0022] Figure 1 This is an exploded view of the battery pack in one embodiment of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the battery pack in one embodiment of the present invention;

[0024] Figure 3 This is an exploded structural diagram of the first cooling component in one embodiment of the present invention;

[0025] Figure 4 This is an exploded structural diagram of the first cooling component in another embodiment of the present invention;

[0026] Figure 5 This is an exploded structural diagram of the second cooling component in one embodiment of the present invention;

[0027] Figure 6 This is a top view of the battery pack in one embodiment of the present invention;

[0028] Figure 7 It is along Figure 6 Sectional view along the middle AA direction;

[0029] Figure 8 It is along Figure 6 Sectional view along the BB direction.

[0030] In the picture:

[0031] 100, First cooling component; 110, First flow channel plate; 120, Second flow channel plate; 130, First intermediate plate; 131, Fifth connecting port; 132, Sixth connecting port; 140, First heat dissipation flow channel; 141, Heat dissipation sub-flow channel; 142, First connecting sub-flow channel; 150, Third connecting port; 160, First connecting port; 170, First transfer flow channel; 200, Second cooling component; 210, Third flow channel plate; 220, Fourth flow channel plate; 230, Second Intermediate plate; 231, Seventh connecting port; 232, Eighth connecting port; 240, Second heat dissipation channel; 250, Second transfer channel; 260, Fourth connecting port; 270, Second connecting port; 300, Housing; 400, Battery cell assembly; 410, Battery cell; 411, Explosion-proof valve; 412, Terminal post; 420, Busbar; 430, First flow gap; 500, First water nozzle; 600, Second water nozzle; 700, Electrical connector; 800, Second flow gap. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] refer to Figures 1-8As shown, an embodiment of this utility model proposes a housing and battery pack for an immersion battery pack. The housing for the immersion battery pack includes a shell 300, a first cooling element 100, and a second cooling element 200. The battery pack includes a cell assembly 400 and the aforementioned housing for the immersion battery pack. A receiving space is formed within the shell 300 of the housing for the immersion battery pack. At least one set of cell assemblies 400 is placed within the receiving space. The cell assembly 400 includes a plurality of cells 410 spaced apart along a first direction. A first flow gap 430 is formed between adjacent cells 410 of the cell assembly 400. The first cooling element 100 and the second cooling element 200 are respectively disposed on opposite sides of the receiving space along the height direction of the housing for the immersion battery pack. Structural adhesive is provided at the bottom of the cell assembly 400 to bond it to the first cooling element 100 or the second cooling element 200 located at the bottom, thereby improving the stability of the cell assembly 400 within the receiving space. The first cooling component 100 has a first heat dissipation channel 140 inside, and the first cooling component 100 is also provided with a first connecting port 160 and a third connecting port 150 connecting the first heat dissipation channel 140. The first connecting port 160 also connects to the receiving space. The second cooling component 200 has a second heat dissipation channel 240 inside, and the second cooling component 200 is provided with a second connecting port 270 and a fourth connecting port 260 connecting the second heat dissipation channel 240. The second connecting port 270 also connects to the receiving space. One of the third connecting port 150 and the fourth connecting port 260 is a liquid inlet and the other is a liquid outlet. Any battery cell 410 or any first flow gap 430 is arranged opposite to at least one first connecting port 160. At the same time, any battery cell 410 or any first flow gap 430 is arranged opposite to at least one second connecting port 270.

[0037] Taking the third connecting port 150 as the liquid inlet and the fourth connecting port 260 as the liquid outlet as an example, the coolant enters the first heat dissipation channel 140 from the third connecting port 150, and then flows sequentially through each of the first connecting ports 160 and flows to the first flow gaps 430 formed between each battery cell 410. Since each battery cell 410 or each of the first flow gaps 430 corresponds to at least one first connecting port 160 in the height direction of the submersible battery pack housing, each battery cell 410 or each of the first flow gaps 430 is submerged... The battery pack housing has at least one second connection port 270 in each height direction, so the coolant does not need to flow through other cells 410 to cool the cell 410 closest to it. When multiple cell groups 400 are set, the time difference of the coolant flowing through different cells 410 in the same row of cells formed by different cell groups 400 is shortened. Or when only one cell group 400 is set, the time difference of the coolant flowing through the positive and negative terminals of the same cell 410 is shortened, thereby improving the temperature uniformity of the cell group 400.

[0038] It is understood that any cell 410 or any first flow gap 430 is positioned opposite to at least one first connection port 160 in the height direction of the submersible battery pack housing. The positioning of any cell 410 or any first flow gap 430 opposite to at least one second connection port 270 in the height direction of the submersible battery pack housing includes the following situations: both the first connection port 160 and the second connection port 270 are opposite to the cell 410; both the first connection port 160 and the second connection port 270 are opposite to the first flow gap 430; the first connection port 160 and the second connection port 270 are opposite to the cell 410 and the first flow gap 430, respectively. The last situation is further subdivided into: the first connection port 160 is opposite to the cell 410, and the second connection port 270 is opposite to the first flow gap 430; the first connection port 160 is opposite to the first flow gap 430, and the second connection port 270 is opposite to the cell 410.

[0039] In one embodiment, Figure 1 The X-axis is the first direction, and the X-axis is the width direction of cell 410. Figure 1 The Y-axis is the second direction, which is the length direction of cell 410. The second direction is perpendicular to the first direction. Figure 1 In the diagram, the Z-axis represents the height direction of the battery cell 410 and the housing of the submerged battery pack. When the coolant flows through the first flow gap 430, it preferentially contacts the large surface of the battery cell 410, thereby effectively removing the heat from the battery cell 410.

[0040] Reference 1 and Figure 8 As shown, the second cooling component 200 is disposed opposite to the terminal post 412 of the battery cell 410. In order to make reasonable use of space and further improve the integration of the battery pack, the second heat dissipation channel 240 and the terminal post 412 of the battery cell 410 are arranged at intervals along the second direction, and the second cooling component 200 protrudes towards the battery cell assembly 400 to form the second heat dissipation channel 240. The fourth connecting port 260 is opened on the side wall of the second heat dissipation channel 240.

[0041] Continue to refer to 1 and Figure 8As shown, an explosion-proof valve 411 is provided on the side of the battery cell 410 facing the second cooling element 200. The second connecting port 270 is directly opposite each explosion-proof valve 411. In this configuration, any battery cell 410 is positioned opposite at least one second connecting port 270 in the height direction, thus meeting the temperature uniformity requirements of the battery cell assembly 400. When a battery cell 410 experiences thermal runaway, ejected material can enter the second heat dissipation channel 240 through the second connecting port 270 and be discharged from the battery pack through the second heat dissipation channel 240. This reduces the possibility of heat spread caused by localized accumulation of ejected material at the second cooling element 200, improving safety. It is understood that the explosion-proof valve 411 can be located on either the bottom or top surface of the battery cell 410, meaning the second cooling element 200 can be located either at the bottom or top of the battery cell 410. The first connecting port 160 is positioned opposite to the first flow gap 430. At this time, the coolant flowing out through the first connecting port 160 has a short flow path and low flow resistance, which speeds up the circulation of the coolant.

[0042] Specifically, based on the number of battery cells 400, their length, and flow resistance requirements, the first heat dissipation channel 140 includes multiple heat dissipation sub-channels 141, which are the same as or integer multiples of the number of battery cells 400. The heat dissipation sub-channels 141 extend along a first direction, and a first connecting port 160 is formed on the sidewall of each heat dissipation sub-channel 141. When multiple heat dissipation sub-channels 141 are spaced apart along a second direction, the first heat dissipation channel 140 also includes two first connecting sub-channels 142. The two first connecting sub-channels 142 are respectively located at both ends of the length of the heat dissipation sub-channels 141 and communicate with their respective corresponding heat dissipation sub-channels 141. For example, the first connecting sub-channels 142 also have first connecting ports 160.

[0043] Taking a single battery cell assembly 40 as an example, the first heat dissipation channel 140 includes two heat dissipation sub-channels 141 and two first connecting sub-channels 142, and the first heat dissipation channel 140 is arranged in a U-shape. In order to improve the flow rate of the coolant and improve the temperature uniformity of the positive and negative electrodes of the same battery cell 410, first connecting ports 160 are opened on both sides of the two heat dissipation sub-channels 141 that are arranged opposite to each other along the second direction, that is, four first connecting ports 160 are opened on the same battery cell 410 or the same gap section.

[0044] Understandably, the housing 300 itself can be configured as a closed structure to prevent leakage of the coolant used to immerse the battery cell assembly 400, with both the first cooling element 100 and the second cooling element 200 located inside the housing 300. Alternatively, the housing 300 can be configured as a structure with openings at both the top and bottom, with the first cooling element 100 and the second cooling element 200 respectively positioned at the openings at both ends of the housing 300 and forming a closed structure with the housing 300. In this case, the first cooling element 100 and the second cooling element 200 not only provide cooling but also prevent coolant leakage and protect the battery cell assembly 400, while saving space in the battery pack and improving its integration.

[0045] Based on the premise that the housing 300 is designed with openings at both ends, the housing 300 includes a front side plate and a rear side plate arranged opposite each other, as well as a left side plate and a right side plate arranged opposite each other. The front side plate, rear side plate, left side plate, and right side plate together form the housing 300. The front side plate, rear side plate, left side plate, and right side plate can be selected from single-wall structures, profiles, or roll-formed steel structures according to structural and installation requirements, without specific limitations here. The first cooling component 100 and the second cooling component 200 are sealed and connected to the openings at both ends of the housing 300 by means including but not limited to welding, screw connection + sealant, or screw connection + sealing ring. Specifically, in order to reduce the sealing difficulty, the contact surfaces of the first cooling component 100 and / or the second cooling component 200 with the housing 300 are planar.

[0046] refer to Figures 2-4 As shown, to facilitate connection to external pipelines, both the third connection port 150 and the fourth connection port 260 are located outside the accommodating space. To reduce the space occupied by the pipelines connecting the third connection port 150 and the fourth connection port 260 in the height direction of the cell 410, the third connection port 150 and the fourth connection port 260 are respectively located on the facing surfaces of the first cooling element 100 and the second cooling element 200. Furthermore, the third connection port 150 and the fourth connection port 260 are located on the same side of the housing 300.

[0047] Specifically, a first water nozzle 500 and a second water nozzle 600 are respectively provided on the first cooling component 100 and the second cooling component 200. The first water nozzle 500 is fixed to the third connecting port 150, and the second water nozzle 600 is fixed to the fourth connecting port 260. Moreover, the first water nozzle 500 extends towards the second cooling component 200, and the second water nozzle 600 extends towards the first cooling component 100. Based on this, in order to provide installation space for the pipes used to connect to the first water nozzle 500 and the second water nozzle 600, the third connecting port 150 and the fourth connecting port 260 are staggered along a second direction.

[0048] To reduce the processing difficulty of the first heat dissipation channel 140, in one embodiment, the first cooling component 100 is set separately. The first cooling component 100 includes a first flow channel plate 110 and a second flow channel plate 120. The second flow channel plate 120 is located on the side of the first flow channel plate 110 facing away from the cell assembly 400. The third connecting port 150 and the first connecting port 160 are both provided on the first flow channel plate 110. The first flow channel plate 110 protrudes towards the cell assembly 400 to form a first heat dissipation channel groove. The first connecting port 160 is opened on the two side walls of the first heat dissipation channel groove that are arranged opposite to each other along the second direction. The second flow channel plate 120 blocks the groove opening of the first heat dissipation channel groove to form the first heat dissipation channel 140. In order to connect with the third connection port 150 located outside the housing space, and without affecting the sealing between the first cooling component 100 and the housing 300, the contact surface between the first flow channel plate 110 and the housing 300 is flat. The second flow channel plate 120 protrudes in a direction away from the battery cell assembly 400 to form a first transfer flow channel groove. The first flow channel plate 110 blocks the groove opening of the first transfer flow channel groove to form a first transfer flow channel 170. The first transfer flow channel 170 connects the first heat dissipation flow channel 140 and the third connection port 150.

[0049] To further improve temperature uniformity, the first heat dissipation channel 140 has an axis of symmetry extending along a first direction. When the battery cell assembly 400 is placed in the receiving space, it is arranged symmetrically with respect to this axis of symmetry. For example, the first water nozzle 500 is offset from the axis of symmetry of the first heat dissipation channel 140 in a second direction. In this case, the first intermediate channel 170 is configured as an L-shape, with one end extending along the first direction and communicating with the first heat dissipation channel 140, and the other end extending along the second direction and communicating with the first water nozzle 500 through a third connecting port 150, so that the end of the first intermediate channel 170 communicating with the first heat dissipation channel 140 is located on the axis of symmetry of the first heat dissipation channel 140. More specifically, both the first heat dissipation channel groove and the first intermediate channel groove are stamped to reduce the processing difficulty of the first cooling component 100.

[0050] refer to Figure 3As shown, in another embodiment, the first cooling component 100 is still separately configured. The first cooling component 100 includes a first flow channel plate 110 and a second flow channel plate 120. The second flow channel plate 120 is located on the side of the first flow channel plate 110 facing away from the cell assembly 400. Unlike the previous embodiment, the second flow channel plate 120 protrudes in a direction away from the cell 410 to form a first heat dissipation flow channel groove. The first flow channel plate 110 is configured as a flat plate structure and blocks the opening of the first heat dissipation flow channel groove to form a first heat dissipation flow channel 140. At the same time, the second flow channel plate 120 protrudes in a direction away from the cell 410 to form a first transfer flow channel groove. The first flow channel plate 110 blocks the opening of the first transfer flow channel groove to form a first transfer flow channel 170. The first transfer flow channel 170 directly connects the third connecting port 150 and the first heat dissipation flow channel 140. Since the first flow channel plate 110 is a flat plate structure, its contact area with the bottom of the battery cell assembly 400 is more stable and reliable compared to the first flow channel plate 110 with the first heat dissipation flow channel groove. In this embodiment, the first heat dissipation flow channel groove and the first transfer flow channel groove are still stamped.

[0051] refer to Figure 4 As shown, in another embodiment, the first cooling component 100 is also configured in separate parts. The first cooling component 100 includes a first flow channel plate 110, a second flow channel plate 120, and a first intermediate plate 130. The first intermediate plate 130 is located on the side of the first flow channel plate 110 away from the cell assembly 400, and the second flow channel plate 120 is located on the side of the first intermediate plate 130 facing away from the first flow channel plate 110. The third connecting port 150 and the first connecting port 160 are both disposed on the first flow channel plate 110. The first flow channel plate 110 protrudes towards the cell assembly 400 to form a first heat dissipation flow channel groove. The first intermediate plate 130 blocks the opening of the first heat dissipation flow channel groove to form a first heat dissipation flow channel 140. The contact surface between the first flow channel plate 110 and the housing 300 is a plane. The second flow channel plate 120 protrudes away from the battery cell assembly 400 to form a first transfer flow channel groove. The first intermediate plate 130 blocks the opening of the first transfer flow channel groove to form a first transfer flow channel 170. The first intermediate plate 130 is provided with a fifth connecting port 131 and a sixth connecting port 132. The orthographic projections of the third connecting port 150 and the fifth connecting port 131 onto the second flow channel plate 120 fall within the first transfer flow channel 170. The orthographic projections of the sixth connecting port 132 onto the first flow channel plate 110 and the second flow channel plate 120 fall within the first heat dissipation flow channel 140 and the first transfer flow channel 170, respectively. That is, the first transfer flow channel 170 is connected to the first water tap 500 through the third connecting port 150 and the fifth connecting port 131, and the first transfer flow channel 170 is connected to the first heat dissipation flow channel 140 through the sixth connecting port 132. Compared to the first transfer channel groove being disposed on the first intermediate plate 130, the first transfer channel has better pressure resistance. In this embodiment, the first heat dissipation channel groove and the first transfer channel groove are also stamped.

[0052] Specifically, the projection of the sixth connecting port 132 falls on the axis of symmetry of the first heat dissipation channel 140, so that the flow rate of coolant to each heat dissipation sub-channel 141 is consistent, thereby further improving temperature uniformity. More specifically, the first water nozzle 500 is inserted into the third connecting port 150 and fixedly connected to the second channel plate 120 by means including but not limited to welding or adhesive bonding. Of course, the first water nozzle 500 can also be directly fixed into the third connecting port 150.

[0053] refer to Figure 5 , Figure 7 and Figure 8 As shown, the second cooling component 200 is also separately configured. The second cooling component 200 includes a fourth flow channel plate 220 and a second intermediate plate 230. The fourth flow channel plate 220 is located on the side of the second intermediate plate 230 facing the battery cell 410. The second connecting port 270 and the fourth connecting port 260 are both disposed on the fourth flow channel plate 220. The fourth flow channel plate 220 protrudes in a direction away from the battery cell assembly 400 to form a second heat dissipation flow channel groove. The second intermediate plate 230 blocks the groove opening of the second heat dissipation flow channel groove to form a second heat dissipation flow channel 240.

[0054] To reduce the sealing difficulty between the second cooling component 200 and the housing 300, and to allow coolant to flow into or out of the second heat dissipation channel 240 through each of the second connecting ports 270, the second cooling component 200 also includes a third channel plate 210. The third channel plate 210 is located on the side of the second intermediate plate 230 facing away from the fourth channel plate 220. The third channel plate 210 protrudes away from the cell assembly 400 to form a second transfer channel groove. The second intermediate plate 230 blocks the opening of the second transfer channel groove to form a second transfer channel 250. The second intermediate plate 230 is provided with a seventh connecting port 231 and an eighth connecting port 232. The seventh connecting port 231 and the eighth connecting port 232 are located on opposite sides of the second transfer channel 250 along the first direction. The orthographic projections of the seventh connecting port 231 and the fourth connecting port 260 onto the direction of the third channel plate 210 coincide and fall within the second transfer channel 250. The orthographic projections of the eighth connecting port 232 onto the fourth channel plate 220 and the third channel plate 210 respectively fall within the second heat dissipation channel 240 and the second transfer channel 250. That is, the second transfer channel 250 is connected to the second water nozzle 600 through the fourth connecting port 260 and the seventh connecting port 231, and at the same time, the second transfer channel 250 is connected to the second heat dissipation channel 240 through the eighth connecting port 232. The second heat dissipation channel groove and the second transfer channel groove are also stamped.

[0055] Continue to refer to Figure 1 and Figure 5As shown, the second heat dissipation channel 240 and the second transfer channel 250 are both symmetrically arranged with respect to the axis of symmetry of the first heat dissipation channel 140, that is, the second heat dissipation channel 240 and the second transfer channel 250 have the same axis of symmetry as the first heat dissipation channel 140. Specifically, the second transfer channel 250 includes a central rotor channel arranged in the same number as or an integer multiple of the number of cell groups 400. The central rotor channel extends along a first direction, and the orthogonal projections of the seventh connecting port 231 and the eighth connecting port 232 toward the direction of the third channel plate 210 both fall on the axis of symmetry of the second transfer channel 250 to further improve temperature uniformity. When multiple second heat dissipation sub-channels 141 are spaced along the second direction, the second transfer channel 250 also includes two second connecting sub-channels. The two second connecting sub-channels are respectively located at both ends of the length of the middle rotor channel and connected to each middle rotor channel. The orthogonal projections of the seventh connecting port 231 and the eighth connecting port 232 toward the second upper channel direction fall on the second connecting sub-channels located at both ends of the length of the middle rotor channel.

[0056] refer to Figure 7 and Figure 8 As shown, the volume of the cell assembly 400 is smaller than the accommodating space. In addition to the first flow gap 430 formed between the large surfaces of adjacent cells 410, a second flow gap 800 is formed between the cell assembly 400 and the housing 300 and / or between the cell assembly 400 and the second cooling element 200 and / or between the cell assembly 400 and the first cooling element 100, so as to cool the remaining surfaces of the cells 410.

[0057] In addition, the battery pack also includes a spacer structure disposed within the second flow gap 800. This spacer structure adjusts the volume of the second flow gap 800, thereby ensuring a relatively uniform flow rate of coolant across all surfaces of the battery through the second flow gap 800, further improving the temperature uniformity among the individual cells 410. Specifically, the spacer structure may employ, but is not limited to, plastic sheets, foam, and potting compound.

[0058] refer to Figure 7 As shown, the battery pack also includes at least two electrical connectors 700, both of which are electrically connected to the cell assembly 400. Specifically, one end of the electrical connector 700 is located within the receiving space and is electrically connected to the busbar 420 on the cell assembly 400 by means including but not limited to welding and screwing. The other end protrudes from the receiving space through the mounting hole of the housing 300. A sealing element is provided at the mounting hole to achieve a sealed connection between the electrical connector 700 and the housing 300, thereby achieving a sealed isolation between the inside and outside of the receiving space. The sealing element is made of insulating material and can be connected to the housing 300 as a whole by means of insert injection molding, potting, and encapsulation, taking into account insulation safety, sealing performance, and integration.

[0059] An embodiment of this utility model also proposes a means of transportation, including the aforementioned battery pack. This means of transportation includes, but is not limited to, vehicles, boats, etc.

[0060] 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 tank for submerged battery pack, used for placing a battery cell group (400), the battery cell group (400) comprising a plurality of battery cells (410) arranged at intervals, a first flow gap (430) being formed between adjacent battery cells (410) in the battery cell group (400), characterized in that, The enclosure for the submersible battery pack includes: A housing (300) having an accommodating space formed therein to accommodate the battery cell assembly (400); A first cooling element (100) and a second cooling element (200) are respectively disposed on opposite sides of the accommodating space along the height direction of the immersion battery pack housing. A first heat dissipation channel (140) and a second heat dissipation channel (240) are respectively formed in the first cooling element (100) and the second cooling element (200). A first connecting port (160) is also provided on the first cooling element (100), and a second connecting port (270) is provided on the second cooling element (200). The first connecting port (160) connects the first heat dissipation channel (140) and the accommodating space, and the second connecting port (270) connects the second heat dissipation channel (240) and the accommodating space. In the height direction of the housing for the immersion battery pack, any one of the battery cells (410) or any one of the first flow gaps (430) is disposed opposite to at least one of the first communication ports (160), and any one of the battery cells (410) or any one of the first flow gaps (430) is disposed opposite to at least one of the second communication ports (270).

2. The tank for an immersed battery pack according to claim 1, characterized by, The second heat dissipation channel (240) is arranged at a distance from the terminal post (412) of the battery cell (410), and the second cooling component (200) protrudes towards the battery cell assembly (400) to form the second heat dissipation channel (240).

3. The tank for an immersion battery pack according to claim 1 or 2, characterized by, The second communication port (270) is disposed opposite to the explosion-proof valve (411) of the battery cell (410).

4. The tank for an immersion battery pack according to claim 1 or 2, characterized by, The housing (300) has openings at both the top and bottom ends. The first cooling component (100) and the second cooling component (200) are both fixedly connected to the housing (300) and respectively block the openings at opposite ends of the housing (300).

5. The tank for an immersed battery pack according to claim 4, characterized in that, The first cooling component (100) is further provided with a third connecting port (150) that connects to the first heat dissipation channel (140), and the second cooling component (200) is further provided with a fourth connecting port (260) that connects to the second heat dissipation channel (240). One of the third connecting port (150) and the fourth connecting port (260) is a liquid inlet and the other is a liquid outlet. The third connecting port (150) and the fourth connecting port (260) are respectively provided on the opposing surfaces of the first cooling component (100) and the second cooling component (200), and both the third connecting port (150) and the fourth connecting port (260) are located outside the accommodating space.

6. The tank for an immersed battery pack according to claim 5, characterized in that, The third communication port (150) and the fourth communication port (260) are located on the same side of the housing (300).

7. The tank for an immersed battery pack according to claim 4, characterized by The contact surfaces between the first cooling element (100) and / or the second cooling element (200) and the housing (300) are planar.

8. The tank for an immersed battery pack according to claim 1 or 2, characterized by, The first heat dissipation channel (140) and / or the second heat dissipation channel (240) have an axis of symmetry extending along the arrangement direction of the cells (410) in the cell group (400).

9. The tank for an immersed battery pack according to claim 1 or 2, characterized by, The enclosure for the immersion battery pack also includes at least two electrical connectors (700), one end of which is electrically connected to the battery cell assembly (400), and the other end of which extends out of the receiving space. The electrical connectors (700) are sealed to the housing (300).

10. A battery pack comprising a set of battery cells (400), characterized in that, The battery pack further includes a housing for an immersion battery pack as described in any one of claims 1-9, wherein at least one set of the battery cells (400) is placed within the housing space.

11. The battery pack of claim 10, wherein, A second flow gap (800) is formed between the battery cell assembly (400) and the housing (300) and / or between the battery cell assembly (400) and the second cooling element (200) and / or between the battery cell assembly (400) and the first cooling element (100).

12. The battery pack of claim 11, wherein, The battery pack also includes a spacer structure disposed within the second flow gap (800) to adjust the volume of the second flow gap (800).

13. Vehicle, characterized in that The vehicle includes the battery pack as described in any one of claims 10-12.

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