Battery cell bracket and immersed liquid-cooled battery pack

Abstract

The utility model discloses a battery cell bracket and an immersed liquid-cooled battery pack, and belongs to the technical field of batteries. A plurality of battery cell limiting grooves are formed in the first surface of the battery cell bracket and are used for accommodating battery cells of a battery pack; a lug for supporting the battery cell is arranged in the battery cell limiting groove, and an over-current gap is reserved between the bottom surface of the battery cell limiting groove and the end surface of the battery cell in a state that the end surface of the battery cell is propped against the lug; the battery cell support is further provided with a second surface opposite to the first surface, the battery cell support is provided with a communication hole penetrating through the first surface and the second surface, the communication hole is used for being communicated with a liquid hole of a liquid cooling plate of the battery pack, and the communication hole is in fluid communication with the overflowing gap in the state that the battery cell is contained in the battery cell limiting groove. The cooling liquid can flow into the battery cell limiting groove, so that the part, accommodated in the battery cell limiting groove, of the battery cell is subjected to liquid cooling heat dissipation, the consistency of the overall temperature of the battery cell is ensured, and the stability of the battery cell is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell bracket and an immersion liquid-cooled battery pack. Background Art

[0002] A battery pack usually includes a battery box and a battery module housed in the battery box. The battery module is formed by a plurality of battery cells arranged in a set manner. Among them, the battery cell can be a cylindrical battery cell, a square shell battery cell or a solid battery cell, and can be specifically designed according to the use scenario and use requirements of the battery pack. Since the outer contour of the cylindrical battery cell is circular, it is difficult to form a stable and reliable limiting fit for the battery module as a whole by relying solely on the contact and abutment between the cylindrical batteries. Therefore, for a battery module composed of cylindrical batteries, when it is installed in a battery box, it is usually necessary to use a battery cell holder to limit the cylindrical batteries in the battery module to ensure the stability of the battery module installation and improve the safety of the battery pack.

[0003] In related technologies, the cell holder has multiple retaining grooves that match the cylindrical cells one by one. When assembling the battery module, the cylindrical cells are installed one by one into the corresponding retaining grooves. After the battery module is assembled, the battery module is placed into the battery box. For immersion liquid-cooled battery packs, the configuration of the cell holder makes it difficult for the coolant to flow into the retaining grooves, resulting in poor cooling of the cylindrical cells contained in the retaining grooves. This can easily lead to poor temperature consistency of the cylindrical cells, affecting the stability of the battery pack.

[0004] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0005] The purpose of this application is to solve or at least alleviate some or all of the above problems. To this end, the purpose of this application is to provide a battery cell holder and an immersion liquid-cooled battery pack to improve the cooling effect of the battery cell, ensure the temperature consistency of the battery cell, and enhance the stability of the battery pack.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, a cell holder is provided for an immersion liquid-cooled battery pack, wherein a first surface of the cell holder has a plurality of cell limiting grooves, the cell limiting grooves being used to accommodate the cells of the immersion liquid-cooled battery pack;

[0008] The battery cell limiting groove is provided with a protrusion for supporting the battery cell, and when the protrusion is in contact with the end surface of the battery cell, a flow gap is left between the bottom surface of the battery cell limiting groove and the end surface of the battery cell;

[0009] The cell holder also has a second surface disposed opposite the first surface. A communication hole is formed on the cell holder, extending through the first and second surfaces. The communication hole is configured to communicate with the liquid hole of the liquid cooling plate of the submerged liquid-cooled battery pack. When the cell is contained within the cell retaining groove, the communication hole is in fluid communication with the flow gap. The end surface of the cell can be the top surface or the bottom surface of the cell, and the liquid hole of the liquid cooling plate can be the liquid outlet or the liquid inlet of the liquid cooling plate.

[0010] As an optional solution of the battery cell holder, the second surface of the battery cell holder has a boss that is plugged into and fits with the liquid hole, and the communication hole passes through the boss.

[0011] As an optional solution of the battery cell holder, the second surface of the battery cell holder further has a groove for accommodating structural adhesive, and the groove is staggered with the boss.

[0012] As an optional solution for the battery cell holder, there are multiple grooves, each of which penetrates the battery cell holder along a first direction; or each of which penetrates the battery cell holder along a second direction, wherein the first direction and the second direction intersect.

[0013] As an optional solution of the battery cell holder, on the first surface of the battery cell holder, the communication hole and the battery cell limiting groove are staggered.

[0014] As an optional scheme for the battery cell holder, the arrangement of the multiple battery cell limiting grooves is as follows: multiple battery cell limiting grooves arranged in sequence along the first direction form a group of battery cell limiting groove groups, multiple groups of battery cell limiting groove groups are arranged along the second direction, and the battery cell limiting grooves in two adjacent groups of battery cell limiting groove groups are staggered.

[0015] As an optional solution for the battery cell holder, the first surface of the battery cell holder also has a continuous groove that penetrates the battery cell holder along the first direction, and multiple continuous grooves are arranged at intervals along the second direction, and each of the continuous grooves is used to connect the battery cell limiting grooves arranged in sequence in the first direction.

[0016] As an optional solution of the battery cell support, each battery cell limiting groove has two symmetrical and spaced-apart protrusions, and the space between the two protrusions in each battery cell limiting groove is connected to the connecting groove.

[0017] In a second aspect, an immersion liquid-cooled battery pack is provided, comprising a battery module, a liquid cooling plate and a cell holder as described above, wherein the cell holder is located between the battery module and the liquid cooling plate, the first surface of the cell holder faces the battery module, and the second surface of the cell holder faces the liquid cooling plate.

[0018] As an optional solution for the immersion liquid-cooled battery pack, the immersion liquid-cooled battery pack also includes a battery box, which has openings at both ends of its height direction. There are two liquid cooling plates, one of which is fixed to the top of the battery box and covers the corresponding opening, and the other liquid cooling plate is fixed to the bottom of the battery box and covers the corresponding opening.

[0019] The beneficial effects of this application are:

[0020] The present application provides a cell holder, wherein the first surface of the cell holder has a plurality of cell limiting grooves, the cell limiting grooves being used to accommodate the cells of the battery pack; the cell limiting grooves are provided with protrusions for supporting the cells, and when the end faces of the cells are in contact with the protrusions, a flow gap is left between the bottom surface of the cell limiting grooves and the end faces of the cells; the cell holder also has a second surface arranged opposite to the first surface, the cell holder has a connecting hole running through the first surface and the second surface, the connecting hole being used to communicate with the liquid hole of the liquid cooling plate of the battery pack, and the connecting hole is in fluid communication with the flow gap when the cells are accommodated in the cell limiting grooves, so as to ensure that the coolant can flow into the cell limiting grooves, so as to achieve liquid cooling and heat dissipation of the portion of the cells accommodated in the cell limiting grooves, ensure the consistency of the overall temperature of the cells, and improve the stability of the cells. Wherein, the end face of the cell can be the top surface or the bottom surface of the cell, and the liquid hole of the liquid cooling plate can be the liquid outlet hole of the liquid cooling plate or the liquid inlet hole of the liquid cooling plate.

[0021] The immersion liquid-cooled battery pack provided in the present application can improve the cooling effect of the battery cells, ensure the temperature consistency of the battery cells, and enhance the stability of the battery pack by applying the above-mentioned battery cell bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present application and these drawings without any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the battery pack provided in the embodiment of the present application;

[0024] Figure 2 yes Figure 1 Exploded diagram of the battery pack;

[0025] Figure 3 is a schematic top view of the battery pack provided in an embodiment of the present application with the second liquid cooling plate removed;

[0026] Figure 4 yes Figure 3 Schematic cross-sectional view at LL;

[0027] Figure 5 yes Figure 3 Schematic cross-sectional view at MM in the middle;

[0028] Figure 6 This is a schematic structural diagram of a cell support in one direction provided by an embodiment of the present application;

[0029] Figure 7 This is a schematic structural diagram of the battery cell support provided in another direction according to an embodiment of the present application;

[0030] Figure 8 yes Figure 7 Schematic diagram of the partial structure of the battery cell bracket.

[0031] Reference numerals:

[0032] 1. Battery box; 11. Liquid inlet transition hole; 12. Liquid outlet transition hole;

[0033] 2. Battery module; 21. Battery cell;

[0034] 3. Liquid cooling module; 31. First liquid cooling plate; 311. First liquid inlet; 312. First liquid outlet; 32. Second liquid cooling plate; 321. Second liquid inlet; 322. Second liquid outlet;

[0035] 4. Cell support; 4a. First surface; 4b. Second surface; 41. Cell limiting groove; 41a. Overcurrent gap; 42. Bump; 43. Connecting hole; 44. Boss; 45. Groove; 46. Connecting groove;

[0036] 5. Liquid inlet connector;

[0037] 6. Liquid outlet connector. DETAILED DESCRIPTION

[0038] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0039] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0040] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0041] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0042] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0043] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0045] Figure 1 It is a schematic diagram of the structure of the battery pack provided in an embodiment of the present application. Figure 2 yes Figure 1 Schematic diagram of the battery pack. Figures 1 to 2 As shown, the battery pack provided in the present application includes a battery box 1, a battery module 2 and a battery cell holder 4, wherein the battery module 2 and the battery cell holder 4 are both installed in the battery box 1, and the battery module 2 includes a plurality of battery cells 21 arranged in a set manner, and the battery cell holder 4 is used to support and limit the battery cells 21 to ensure the stability of the installation of the battery module 2, thereby improving the safety of the battery pack.

[0046] exist Figure 2 In the embodiment, the battery cell 21 is a cylindrical cell, and multiple cylindrical cells are arranged in a predetermined pattern to form the battery module 2. Accordingly, the cell holder 4 has a cell retaining groove 41 that mates with the cylindrical cell. The cell retaining groove 41 is circular in shape, and the bottom of the cell 21 is received within the cell retaining groove 41 to achieve a fixed position for the installation of the cell 21. It is understood that in other embodiments, the cell 21 can also be a prismatic cell or a cell of another shape, and this is not a limitation here.

[0047] For ease of description, the thickness direction of the battery box 1 is referred to as the height direction, the length direction of the battery box 1 is referred to as the first direction, and the width direction of the battery box 1 is referred to as the second direction. It is understood that the length direction of the battery box 1 is the same as the length direction of the cell holder 4, and the width direction of the battery box 1 is the same as the width direction of the cell holder 4.

[0048] The battery pack also includes a liquid cooling module 3, which is used to perform thermal control on the battery module 2 in the battery box 1 to ensure temperature consistency of each battery cell 21 in the battery module 2, thereby improving the safety and stability of the battery pack.

[0049] The liquid cooling module 3 includes a first liquid cooling plate 31 and a second liquid cooling plate 32, which are mounted on the bottom and top of the battery case 1, respectively. Together, they form a chamber for accommodating the battery module 2 and the cell holder 4. During the liquid cooling process, coolant enters the chamber through the first liquid cooling plate 31 and submerges the battery module 2, regulating the temperature of the battery module 2. Once the chamber is filled with coolant, it is discharged through the second liquid cooling plate 32 and then, after cooling, re-enters the chamber through the first liquid cooling plate 31, achieving coolant recycling.

[0050] exist Figure 2 In the embodiment, the battery case 1 has an open bottom and top. The first liquid cooling plate 31 is fixed to the bottom of the battery case 1 and covers the open bottom of the battery case 1. This means that the first liquid cooling plate 31 not only serves as part of the liquid cooling circuit of the liquid cooling module 3, but also serves as the bottom plate structure of the battery case 1. This design not only reduces the material cost of the battery pack, but also reduces the overall weight of the battery pack, thereby increasing the energy density of the battery pack. Similarly, the second liquid cooling plate 32 is fixed to the top of the battery case 1 and covers the open top of the battery case 1. This means that the second liquid cooling plate 32 not only serves as part of the liquid cooling circuit of the liquid cooling module 3, but also serves as the top cover structure of the battery case 1. This design not only reduces the material cost of the battery pack, but also reduces the overall weight of the battery pack, thereby increasing the energy density of the battery pack. It is understood that in other embodiments, the battery case 1 may also have a separate bottom plate than the first liquid cooling plate 31, and the battery case 1 may also have a separate top cover than the second liquid cooling plate 32.

[0051] In order to ensure the sealing of the connection between the first liquid cooling plate 31 and the battery box 1, a sealant is provided at the connection between the battery box 1 and the first liquid cooling plate 31. For example, the bottom end face of the battery box 1 may have an annular recess for accommodating the sealant, so as to limit the sealant and ensure the sealing effect. Similarly, in order to ensure the sealing of the connection between the second liquid cooling plate 32 and the battery box 1, a sealant is provided at the connection between the battery box 1 and the second liquid cooling plate 32. For example, the top end face of the battery box 1 may have an annular recess for accommodating the sealant, so as to limit the sealant and ensure the sealing effect.

[0052] Figure 3 3 is a schematic top view of the battery pack provided in an embodiment of the present application without the second liquid cooling plate 32 . Figure 4 yes Figure 3 Schematic diagram of the cross section at LL. Figures 3 and 4 Combined with Figure 2As shown, the side wall of the battery box 1 has a liquid inlet transition hole 11 and a liquid outlet transition hole 12. The first liquid cooling plate 31 has a first liquid inlet hole 311 connected to the liquid inlet transition hole 11, and the second liquid cooling plate 32 has a second liquid outlet hole 322 connected to the liquid outlet transition hole 12. Integrating the transition holes connecting the first and second liquid cooling plates 31, 32 on the side wall of the battery box 1 simplifies the liquid inlet structure of the first liquid cooling plate 31 and the liquid outlet structure of the second liquid cooling plate 32, reducing the manufacturing difficulty of the first and second liquid cooling plates 31, 32.

[0053] In addition, the liquid cooling module 3 also includes a liquid inlet joint 5 and a liquid outlet joint 6. The liquid inlet joint 5 is installed on the battery box 1 and is connected to the liquid inlet transition hole 11, and the liquid outlet joint 6 is installed on the battery box 1 and is connected to the liquid outlet joint 6. Furthermore, the liquid cooling module 3 also includes a refrigeration device. The refrigeration device is placed outside the battery box 1, and the liquid outlet end of the refrigeration device is connected to the liquid inlet joint 5, and the liquid inlet end of the refrigeration device is connected to the liquid outlet joint 6. That is, after passing through the refrigeration device, the coolant first enters the first liquid cooling plate 31 through the liquid inlet joint 5, and then enters the accommodating cavity through the first liquid cooling plate 31. After the accommodating cavity is filled with the coolant, the coolant enters the second liquid cooling plate 32, and finally flows back to the refrigeration device through the liquid outlet joint 6, so as to realize the recycling of the coolant and improve the cooling effect of the coolant on the battery module 2.

[0054] Figure 5 yes Figure 3 The cross-sectional view at MM in the figure. Figure 5 Combine Figure 4 As shown, the first liquid cooling plate 31 has a plurality of first liquid outlet holes 312 on the side facing the battery module 2, and the second liquid cooling plate 32 has a plurality of second liquid inlet holes 321 on the side facing the battery module 2. The cooling liquid in the first liquid cooling plate 31 can flow into the accommodating cavity through the first liquid outlet holes 312. During the liquid cooling process, the cooling liquid enters the first liquid cooling plate 31 from the liquid inlet joint 5 through the liquid inlet transition hole 11 and the first liquid inlet hole 311 in sequence, and then flows into the accommodating cavity from the plurality of first liquid outlet holes 312 along the flow channel in the first liquid cooling plate 31; when the cooling liquid in the accommodating cavity submerges the battery module 2 and flows to the lower surface of the second liquid cooling plate 32, the cooling liquid can enter the second liquid cooling plate 32 from the second liquid inlet hole 321, and flow from the second liquid outlet hole 322 to the liquid outlet transition hole 12 along the flow channel in the second liquid cooling plate 32, and finally flows out from the liquid outlet joint 6.

[0055] It is understood that in this embodiment, there is one cell holder 4, which is located below the battery module 2 and above the first liquid cooling plate 31. In other embodiments, there may be two cell holders 4, with one cell holder 4 located between the battery module 2 and the first liquid cooling plate 31, and the other cell holder 4 located between the battery module 2 and the second liquid cooling plate 32. In this case, the connecting hole 43 on the cell holder 4 can be connected to the second liquid inlet hole 321 of the second liquid cooling plate 32. The matching relationship between the cell holder 4 and the second liquid cooling plate 32 can refer to the matching relationship between the first liquid cooling plate 31 and the cell holder 4, and will not be repeated here.

[0056] Figure 6 It is a structural schematic diagram of the battery cell bracket 4 provided in one direction according to an embodiment of the present application. Figure 7 This is a schematic diagram of the structure of the battery support 4 in another direction provided by the embodiment of the present application. Figures 6 and 7 Combined with Figure 5 As shown, the first surface 4a of the battery cell holder 4 has a plurality of battery cell limiting grooves 41, and each battery cell limiting groove 41 has a protrusion 42 for supporting the battery cell 21. When the bottom surface of the battery cell 21 is in contact with the protrusion 42, an overflow gap 41a is left between the bottom surface of the battery cell limiting groove 41 and the bottom surface of the battery cell 21; the battery cell holder 4 also has a connecting hole 43 running through its first surface 4a and the second surface 4b, the connecting hole 43 is connected to the first liquid outlet 312 in a one-to-one correspondence, and the connecting hole 43 is fluidically connected to the overflow gap 41a when the battery cell 21 is accommodated in the battery cell limiting groove 41, so as to ensure that the coolant can flow into the battery cell limiting groove 41, so as to realize liquid cooling of the part of the battery cell 21 accommodated in the battery cell limiting groove 41, thereby ensuring the consistency of the overall temperature of the battery cell 21 and improving the stability of the battery cell 21.

[0057] In other embodiments, when the number of battery cell holders 4 is two, one battery cell holder 4 is located at the bottom of the battery cell 21 and above the first liquid cooling plate 31, and the other battery cell holder 4 is located at the top of the battery cell 21 and below the second liquid cooling plate 32, wherein the battery cell holder 4 located at the top of the battery cell 21 and below the second liquid cooling plate 32 has a plurality of battery cell limiting grooves 41 on the side facing the battery cell 21 (i.e., the first surface 4a), and each battery cell limiting groove 41 also has a protrusion 42. When the top surface of the battery cell 21 is in contact with the protrusion 42, an overflow gap is left between the bottom surface of the battery cell limiting groove 41 and the top surface of the battery cell 21. The overflow gap is used to supply cooling liquid to the top surface of the battery cell 21 to achieve temperature regulation of the top surface of the battery cell 21.

[0058] In this embodiment, the cell holder 4 has a boss 44 on the side facing the first liquid cooling plate 31 (i.e., the second surface 4b) that plugs into the first liquid outlet 312, and the communication hole 43 extends through the boss 44. Inserting the boss 44 into the first liquid outlet 312 not only ensures the proper positioning and assembly between the cell holder 4 and the first liquid cooling plate 31, but also ensures that the coolant flowing out of the first liquid outlet 312 can flow directly and smoothly through the communication hole 43 to the battery module 2.

[0059] exist Figure 7 In the embodiment, the shape of the boss 44 is cylindrical, the center line of the connecting hole 43 is perpendicular to the battery holder 4, and the connecting hole 43 passes through the boss 44. In order to facilitate the plug-in fit between the boss 44 and the first liquid outlet 312, the shape of the first liquid outlet 312 is also circular (see Figure 2 ), and the depth of the boss 44 extending into the first liquid outlet hole 312 is less than the depth of the flow channel in the first liquid cooling plate 31, so as to ensure that the coolant in the flow channel can flow smoothly into the communicating hole 43.

[0060] On the first surface 4a of the battery cell holder 4, the connecting hole 43 and the battery cell limiting groove 41 are staggered. In other words, the connecting hole 43 avoids the battery cells 21 in the battery module 2 to ensure that the coolant can flow out of the connecting hole 43 without being resisted by the battery cells 21, thereby improving the flow rate of the coolant. In this embodiment, the battery module 2 includes multiple rows of battery cell groups arranged along the second direction, and the two adjacent battery cell groups are staggered, and each battery cell group includes a plurality of battery cells 21 arranged along the first direction. The interval between two adjacent battery cells 21 in the same row of battery cell groups is smaller than the interval between two adjacent battery cells 21 in two rows of battery cell groups. Therefore, locating the connecting hole 43 between two adjacent rows of battery cell groups can provide sufficient space for the circulation of the coolant, and the coolant can flow upward along the outer wall of the battery cell 21, which can ensure the stability of the coolant flow and reduce the resistance of the coolant. Similarly, the arrangement of multiple battery cell limiting grooves 41 is as follows: multiple battery cell limiting grooves 41 arranged in sequence along the first direction form a group of battery cell limiting groove groups, multiple groups of battery cell limiting groove groups are arranged along the second direction, and the battery cell limiting grooves 41 in two adjacent groups of battery cell limiting groove groups are staggered to better support the battery cells 21.

[0061] The side of the battery cell holder 4 facing the battery module 2 (i.e., the first surface 4a) also has a continuous groove 46 extending along the first direction, and the continuous groove 46 penetrates the battery cell holder 4 along the first direction. A plurality of continuous grooves 46 are arranged at intervals along the second direction, and each continuous groove 46 is used to connect the battery cell limiting grooves 41 arranged in sequence in the first direction. The design of the continuous groove 46 can not only facilitate the circulation of coolant between the bottoms of the battery cells 21, but also serve as an explosion-proof pressure relief channel for the battery cells 21. When the battery cell 21 thermally runs away, the high-pressure gas or jet generated at the explosion-proof valve of the battery cell 21 can be quickly discharged from the continuous groove 46 to the outside of the battery cell holder 4 to improve the safety of the battery pack.

[0062] Each cell limiting groove 41 has two symmetrical and spaced protrusions 42 , and the space between the two protrusions 42 in each cell limiting groove 41 is connected to the connecting groove 46 to reduce the resistance of the protrusions 42 to the coolant and ensure that the coolant can flow smoothly.

[0063] exist Figure 6 In the embodiment, the bumps 42 in each cell retaining groove 41 are arc-shaped, and the centers of the two bumps 42 in each cell retaining groove 41 coincide. These arc-shaped bumps are designed to accommodate the shape and structure of the cylindrical cell 21, providing better support and stability. Furthermore, structural adhesive is provided between the bottom of the cell 21 and the bumps 42, further enhancing the stability of the cell 21 installation.

[0064] Figure 8 yes Figure 7 Schematic diagram of the partial structure of the battery cell bracket 4. Figure 8 Combine Figure 7 As shown, the cell holder 4 further has a groove 45 on the side facing the first liquid cooling plate 31. The groove 45 is offset from the boss 44 and is used to accommodate structural adhesive, which is used to strengthen the connection between the cell holder 4 and the first liquid cooling plate 31. In addition, because the liquid inlet end of the communication hole 43 is provided on the boss 44, the boss 44 is higher than the groove 45 of the cell holder 4. This effectively prevents the structural adhesive from overflowing into the liquid inlet end of the communication hole 43, thereby preventing the structural adhesive from clogging the communication hole 43.

[0065] In this embodiment, there are multiple grooves 45, and all grooves 45 penetrate the cell holder 4 along the length direction (i.e., the first direction) of the cell holder 4. In other embodiments, all grooves 45 penetrate the cell holder 4 along the width direction (i.e., the second direction) of the cell holder 4, which is not limited here.

[0066] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A battery cell holder for an immersion liquid-cooled battery pack, characterized in that: The first surface (4a) of the battery cell support has a plurality of battery cell limiting grooves (41), and the battery cell limiting grooves (41) are used to accommodate the battery cells (21) of the immersion liquid-cooled battery pack; The battery cell limiting groove (41) has a protrusion (42) for supporting the battery cell (21); when the end surface of the battery cell (21) is in contact with the protrusion (42), an overcurrent gap (41a) is left between the bottom surface of the battery cell limiting groove (41) and the end surface of the battery cell (21); The battery cell holder further comprises a second surface (4b) arranged opposite to the first surface (4a); a connecting hole (43) penetrating the first surface (4a) and the second surface (4b) is provided on the battery cell holder; the connecting hole (43) is used to communicate with the liquid hole of the liquid cooling plate of the immersion liquid cooling battery pack; and the connecting hole (43) is in fluid communication with the overflow gap (41a) when the battery cell (21) is accommodated in the battery cell limiting groove (41).

2. The battery cell support according to claim 1, characterized in that: The second surface (4b) of the battery support has a boss (44) that is plugged into and matched with the liquid hole, and the communication hole (43) passes through the boss (44).

3. The battery cell support according to claim 2, characterized in that: The second surface (4b) of the battery cell support further comprises a groove (45) for accommodating structural adhesive, and the groove (45) and the boss (44) are arranged in a staggered manner.

4. The battery cell support according to claim 3, characterized in that: There are multiple grooves (45), and each groove (45) penetrates the battery cell holder along a first direction; or each groove (45) penetrates the battery cell holder along a second direction, wherein the first direction and the second direction intersect.

5. The battery cell support according to claim 1, characterized in that: On the first surface (4a) of the battery cell support, the communication hole (43) and the battery cell limiting groove (41) are arranged in a staggered manner.

6. The battery cell support according to any one of claims 1 to 5, characterized in that: The arrangement of the plurality of battery cell limiting grooves (41) is as follows: a plurality of battery cell limiting grooves (41) sequentially arranged along a first direction form a group of battery cell limiting grooves, a plurality of groups of battery cell limiting grooves are arranged along a second direction, and the battery cell limiting grooves (41) in two adjacent groups of battery cell limiting grooves are staggered.

7. The battery cell support according to claim 6, characterized in that: The first surface (4a) of the battery cell support further comprises a connecting groove (46) penetrating the battery cell support in a first direction, a plurality of the connecting grooves (46) are arranged at intervals in a second direction, and each connecting groove (46) is used to connect to battery cell limiting grooves (41) arranged sequentially in the first direction.

8. The battery cell support according to claim 7, characterized in that: Each of the battery cell limiting grooves (41) has two symmetrical and spaced-apart protrusions (42), and the space between the two protrusions (42) in each of the battery cell limiting grooves (41) is connected to the connecting groove (46).

9. An immersion liquid-cooled battery pack, characterized in that: The invention comprises a battery module (2), a liquid cooling plate and a cell holder according to any one of claims 1 to 8, wherein the cell holder is located between the battery module (2) and the liquid cooling plate, the first surface (4a) of the cell holder faces the battery module (2), and the second surface (4b) of the cell holder faces the liquid cooling plate.

10. The immersion liquid-cooled battery pack according to claim 9, characterized in that: The submerged liquid-cooled battery pack further comprises a battery box (1), wherein the battery box (1) has openings at both ends in its height direction, and the number of the liquid cooling plates is two, wherein one liquid cooling plate is fixed to the top of the battery box (1) and covers the corresponding opening, and the other liquid cooling plate is fixed to the bottom of the battery box (1) and covers the corresponding opening.

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