Solid-state battery pack structure and vehicle

Abstract

The utility model provides a solid-state battery pack structure and a vehicle, and relates to the technical field of vehicle parts. The solid-state battery pack structure comprises a plurality of modules and a liquid cooling plate, wherein each module comprises a battery cell group and two side plates arranged on two sides of the battery cell group; the bottom surfaces of the plurality of modules are attached to the top surface of the liquid cooling plate, and the liquid cooling plate is used for cooling or heating the battery cell group from the bottom; a heating film is arranged on the plate surface of each side plate and is used for heating the battery cell group from the side part. The liquid cooling plate and the heating film synchronously work, so that each module forms a three-dimensional heating system with a bottom part and two side parts, and the overall temperature rise time of the battery cell group is remarkably shortened; and hot spots and cold spots at the bottom of the battery cell group are eliminated by utilizing the uniform temperature characteristic of the liquid cooling plate, so that the temperature difference of each part of the battery cell group is reduced, and the starting reliability and the charging speed of the battery pack in a low-temperature environment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a solid-state battery pack structure and a vehicle. Background Art

[0002] In low-temperature environments, the chemical reaction activity within the battery pack's cells decreases significantly, leading to a significant decrease in charge and discharge efficiency, directly affecting the low-temperature starting performance and charging speed of electric vehicles. This phenomenon is particularly prominent in solid-state cells, where low temperatures weaken ion conductivity, causing performance degradation far exceeding that of traditional liquid batteries. Currently, mainstream battery packs mostly use a modular design, where the cells are first integrated into modules and then packaged into a housing to form the entire package. To address this low-temperature performance degradation issue, the industry generally adopts active heating technology, which uses the battery pack's built-in heating structure to raise the battery temperature to a reasonable range to restore cell activity.

[0003] In related technologies, heating structures often consist of heating films attached to the module's side panels, or liquid cooling plates integrated into both sides of the module. Heat transfer relies on a "radiating from the module's edges to the center." This design preferentially heats the module's sides, while the center, due to its long heat conduction distance and high thermal resistance, experiences a significant lag in temperature rise. This ultimately creates a temperature differential between the module and its internal cells, making it difficult to achieve a rapid and uniform temperature increase. Utility Model Content

[0004] The problem solved by the utility model is to optimize the heating structure of the battery pack and to quickly and evenly increase the temperature of the battery core.

[0005] In order to solve the above problems, the present invention provides a solid-state battery pack structure and a vehicle.

[0006] In a first aspect, the present invention provides a solid-state battery pack structure, comprising a plurality of modules and a liquid cooling plate, wherein the module comprises a cell group and two side plates provided on both sides of the cell group;

[0007] The bottom surfaces of the plurality of modules are all fitted on the top surface of the liquid cooling plate, and the liquid cooling plate is used to cool or heat the battery cell group from the bottom;

[0008] The plate surface of each side plate is provided with a heating film, and the heating film is used to heat the battery cell group from the side.

[0009] Optionally, a retaining ring is provided between the side plate and the corresponding side surface of the battery cell group, and a gap cavity enclosed by the side surface of the battery cell group, the side plate and the retaining ring is filled with non-curing thermal conductive gel.

[0010] Optionally, the retaining ring is arranged along a side edge of the battery cell group, and the retaining ring is surrounded by foam.

[0011] Optionally, the battery cell group includes a plurality of square solid-state battery cells, the plurality of solid-state battery cells are arranged along the thickness direction, and the side plate is parallel to the arrangement direction of the solid-state battery cells.

[0012] Optionally, a bottom flange is provided at the bottom of the side panel, the bottom flange is perpendicular to the side panel, the inner side of the bottom flange is in contact with the bottom surface of the battery cell group, and the outer side of the bottom flange is in contact with the top surface of the liquid cooling plate.

[0013] Optionally, a gap between the bottom of the module and the liquid cooling plate is filled with non-curing thermal conductive gel.

[0014] Optionally, the outer side surface of the side panel is provided with a heating film, and the inner side surface of the side panel is provided with a PI film.

[0015] Optionally, the module further comprises two end plates, each end plate being provided with a right-angled notch at both side edges adjacent to the side plates, and both ends of the side plates extending out of the end surfaces of the battery cell group, with the extended portions being engaged and connected to the right-angled notches;

[0016] Optionally, the solid-state battery pack structure further includes a box body, the liquid cooling plate is arranged on the inner side of the bottom plate of the box body, and the end plate is connected to the liquid cooling plate by fixing bolts.

[0017] In a second aspect, the present invention provides a vehicle comprising the above-mentioned solid-state battery pack structure.

[0018] The beneficial effects of the solid-state battery pack structure of the present utility model are:

[0019] In low-temperature environments, the liquid cooling plate and the heating film work synchronously, with each module forming a three-dimensional heating system consisting of "bottom + sides." Specifically, the liquid cooling plate evenly transfers heat from the bottom to the battery pack through an internal circulating medium. Simultaneously, the heating film is attached to the side panels, heating the battery pack from both sides. The synergistic effect of the two significantly shortens the overall temperature rise time of the battery pack. Furthermore, the liquid cooling plate has a uniform temperature characteristic, which can transfer localized excess heat generated at the bottom of the side heating film to the middle area at the bottom of the battery pack, eliminating hot and cold spots at the bottom of the battery pack. This, in turn, reduces the temperature difference between different parts of the battery pack, achieving a dual improvement in battery pack startup reliability and charging speed in low-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the disassembled structure of the solid-state battery pack structure of an embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the module structure of the solid-state battery pack structure of an embodiment of the present utility model.

[0022] Figure 3This is a schematic diagram of the module disassembly structure of the solid-state battery pack structure of an embodiment of the present utility model.

[0023] Figure 4 This is a schematic diagram of the side panel structure of the solid-state battery pack structure of an embodiment of the present utility model.

[0024] Figure 5 This is a schematic diagram of the end plate structure of the solid-state battery pack structure of an embodiment of the present utility model.

[0025] Figure 6 This is a schematic diagram of the box structure of the solid-state battery pack structure of an embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 1. Module; 11. Cell group; 12. Side panel; 121. Bottom flange; 122. First gasket; 123. Second gasket; 124. Top flange; 125. Extension; 13. Retaining ring; 14. End plate; 141. Right-angle notch; 142. Fixing bolt; 2. Liquid cooling plate; 3. Heating film; 4. Box; 41. Fixed ground beam; 42. Horizontal partition; 43. Vertical partition. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0029] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in this utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0030] It should be noted that the modifications of "one" and "a plurality" mentioned in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that unless the context clearly indicates otherwise, they should be understood as "one or more". "Several" refers to one or more.

[0031] like Figure 1-3 As shown, an embodiment of the present invention provides a solid-state battery pack structure, including multiple modules 1 and a liquid cooling plate 2, wherein the module 1 includes a cell group 11 and two side plates 12 arranged on both sides of the cell group 11; the bottom surfaces of the multiple modules 1 are all fitted on the top surface of the liquid cooling plate 2, and the liquid cooling plate 2 is used to cool or heat the cell group 11 from the bottom; the plate surface of each side plate 12 is provided with a heating film 3, and the heating film 3 is used to heat the cell group 11 from the side.

[0032] Specifically, the module 1 is generally a rectangular parallelepiped structure, including a bottom surface, a top surface and multiple side surfaces, wherein the top surface of the module 1 refers to the side of the module 1 provided with the busbar assembly, and the bottom surface of the module 1 is opposite to the top surface.

[0033] In this embodiment, in a low-temperature environment, when the electric vehicle requires low-temperature starting or rapid charging, the liquid cooling plate 2 and the heating film 3 operate synchronously, and each module 1 forms a three-dimensional heating system of "bottom + sides". Specifically, the liquid cooling plate 2 transfers heat evenly from the bottom to the battery cell group 11 through the internal circulating medium. At the same time, the heating film 3 is attached to the side plate 12, heating the battery cell group 11 from both sides. The synergistic effect of the two significantly shortens the overall temperature rise time of the battery cell group 11. In addition, the liquid cooling plate 2 has a uniform temperature characteristic, which can transfer the local excess heat generated at the bottom of the side heating film 3 to the middle area at the bottom of the battery cell group 11, eliminating hot spots and cold spots at the bottom of the battery cell group 11, thereby reducing the temperature difference between different parts of the battery cell group 11, and achieving a dual improvement in battery pack starting reliability and charging speed in low-temperature environments.

[0034] It should be noted that a flow channel is provided inside the liquid cooling plate 2, which can realize heat exchange through a circulating medium such as an ethylene glycol aqueous solution; and the heating film 3 generates heat when electricity is supplied.

[0035] Alternatively, as Figure 2 and Figure 3 As shown, a retaining ring 13 is provided between the side plate 12 and the corresponding side surface of the battery cell group 11 , and the gap cavity enclosed by the side surface of the battery cell group 11 , the side plate 12 and the retaining ring 13 is filled with non-curing thermal conductive gel.

[0036] In this optional embodiment, a retaining ring 13 is provided between the side plate 12 and the corresponding side surface of the battery cell group 11, and the annular gap cavity surrounded by the side surface of the battery cell group 11, the inner surface of the side plate 12 and the retaining ring 13 is filled with non-curing thermal conductive gel.

[0037] Thermally conductive gel, also known as thermal paste or thermally conductive silicone, is a viscous substance with high thermal conductivity. It is widely used in thermal management systems for electronic devices. It typically consists of three components: a thermally conductive filler, a matrix material, and additives. Common thermally conductive fillers include aluminum oxide, boron nitride, and carbon fiber, which have high thermal conductivity. The matrix material is typically silicone oil or silicone resin, which has excellent stability and adhesion. Additives are used to adjust the viscosity, flowability, and stability of the thermally conductive gel.

[0038] The non-curing thermal conductive gel is in a semi-fluid state, and its functions are reflected in two aspects: on the one hand, the non-curing thermal conductive gel fills the gap between the side plate 12 and the side of the battery cell group 11 to achieve efficient heat conduction and electrical isolation; on the other hand, its non-curing properties can adapt to the expansion of the battery cell during charging and discharging, and absorb the mechanical stress generated by the gap change between the side plate 12 and the side of the battery cell group 11 through micro-deformation, thereby reducing the extrusion damage between the battery cells of the battery cell group 11 and the side plate 12. It is particularly suitable for solid-state battery cells encapsulated in aluminum-plastic film.

[0039] Specifically, during assembly, the retaining ring 13 can be first fixed to the inner side of the side panel 12 by gluing, and then the semi-fluid thermal conductive gel is coated on the inner side of the side panel 12 in the form of a wall hanging and fills the interior of the retaining ring 13.

[0040] Optionally, the retaining ring 13 is arranged along the side edge of the battery cell group 11 and is surrounded by foam.

[0041] In this optional embodiment, the retaining ring 13 is arranged in a ring along the side edge of the battery cell group 11 to form a ring as large as possible to enclose the thermal conductive gel filled in the gap between the side plate 12 and the side of the battery cell group 11 to prevent leakage or displacement. Figure 3 As shown, for example, a battery cell group 11 composed of square battery cells has a rectangular side surface, and the retaining ring 13 is in a corresponding rectangular frame shape, which completely matches the side profile of the battery cell group 11 .

[0042] Furthermore, the advantage of using foam for retaining ring 13 is that the elastic properties of the foam can adapt to the expansion of the battery cell during charging and discharging or assembly errors. Through micro-deformation, it maintains close contact with the sides of the battery cell pack 11 and the side panels 12, avoiding positioning failure caused by deformation, ensuring that the thermally conductive gel is always effectively enclosed, and maintaining the stability of the side thermal management path. The rigidity of the side panels 12, combined with the flexible cushioning of the retaining ring 13 and the thermally conductive gel, synergistically limit the expansion of the battery cell during charging and discharging, achieving a "rigid constraint + flexible adaptation" synergistic mechanical protection, ensuring the structural stability and long-term reliability of the battery cell pack 11.

[0043] Optionally, the battery cell group 11 includes a plurality of square solid-state battery cells, and the plurality of solid-state battery cells are arranged along the thickness direction, and the side plate 12 is parallel to the arrangement direction of the solid-state battery cells.

[0044] In this alternative embodiment, the cell assembly 11 is formed by stacking multiple square solid-state cells along their thickness, achieving high energy density integration within a limited space. Side panels 12 are arranged parallel to the cell stacking direction, facing the sides of the multiple square solid-state cells, forming lateral constraints on the entire cell assembly 11.

[0045] It should be noted that the multiple square solid-state cells in the cell group 11 are arranged along the thickness direction, and the two ends of this arrangement direction are called the two ends of the cell group 11. The module 1 usually also includes end plates 14 (described later) arranged at the two ends of the cell group 11. Figure 3 As shown, the thickness direction of the square battery cell is the Y direction, the two ends in the Y direction are called the two ends of the battery cell group 11, the two ends in the X direction are called the two sides of the battery cell group 11, and the two ends in the Z direction are called the top or bottom of the battery cell group 11.

[0046] Alternatively, as Figure 4 As shown, a bottom flange 121 is provided at the bottom of the side panel 12 , the bottom flange 121 is perpendicular to the side panel 12 , the inner side surface of the bottom flange 121 is in contact with the bottom surface of the battery cell group 11 , and the outer side surface of the bottom flange 121 is in contact with the top surface of the liquid cooling plate 2 .

[0047] In this optional embodiment, the side panel 12, through the design of the bottom flange 121, provides lateral restraint while also providing additional bottom support for the battery cell group 11. This is suitable for soft-pack solid-state batteries encapsulated with aluminum-plastic film. Soft-pack batteries have low rigidity and are easily deformed, and solid-state batteries generally use soft-pack batteries. The bottom flange 121 can be formed by folding the top of the side panel 12 inward.

[0048] Specifically, the bottom flange 121 is narrow, much smaller than the width of the battery cell group 11, and is fitted on both side edges of the bottom surface of the battery cell group 11 to provide support for the battery cell group 11 and form a certain gap between the battery cell group 11 and the liquid cooling plate 2 to facilitate filling with thermal conductive gel; the outer side surface of the bottom flange 121 is fitted with the top surface of the liquid cooling plate 2, that is, the bottom support is provided by the rigid platform of the liquid cooling plate 2.

[0049] Optionally, the gap between the bottom of the module 1 and the liquid cooling plate 2 is filled with non-curing thermal conductive gel.

[0050] In this alternative embodiment, the gap between the bottom of the module 1 and the liquid cooling plate 2 is filled with a non-solidifying thermally conductive gel. Specifically, the gap formed by the bottom surface of the battery cell assembly 11, the bottom flanges 121 of the side panels 12, and the top surface of the liquid cooling plate 2 is filled with a semi-fluid non-solidifying thermally conductive gel. This small gap is positioned and enclosed by the bottom flanges 121 to prevent the semi-fluid non-solidifying thermally conductive gel from spreading outward.

[0051] The function of this non-curing thermal conductive gel is reflected in two aspects: on the one hand, the non-curing thermal conductive gel is used to fill the tiny gap between the bottom surface of the battery cell group 11 and the top surface of the liquid cooling plate 2 to construct a low thermal resistance heat conduction path, which efficiently transfers the heat generated by the battery cell to the liquid cooling plate 2, or vice versa, while achieving electrical isolation to avoid short circuit between the battery cell and the liquid cooling plate 2; on the other hand, the non-curing property of the thermal conductive gel can adapt to the expansion of the battery cell during charging and discharging, and absorb the mechanical stress caused by the gap change between the liquid cooling plate 2 and the bottom surface of the battery cell group 11 through micro-deformation, thereby reducing the extrusion damage between the battery cells of the battery cell group 11 and the liquid cooling plate 2, ensuring structural safety and long-term reliability, and is particularly suitable for soft-pack batteries encapsulated with aluminum-plastic film.

[0052] Specifically, during assembly, after module 1 is assembled, a layer of non-curing thermally conductive gel is applied to the bottom plate of the housing 4, or the top surface of the liquid cooling plate 2. The thickness of the gel should be at least the height of the gap between the bottom surface of the battery cell pack 11 and the liquid cooling plate 2 after the module 1 is placed on the liquid cooling plate 2, and the area should cover the installation area of ​​the module 1. Then, the module 1 is placed on the liquid cooling plate 2, so that the gap between the bottom of the module 1 and the liquid cooling plate 2 is filled with the non-curing thermally conductive gel, thus securing the module 1.

[0053] Alternatively, as Figure 4 As shown, a first pad 122 is provided between the bottom flange 121 and the fitting surface of the battery cell group 11 , and a second pad 123 is provided between the bottom flange 121 and the liquid cooling plate 2 . Both the first pad 122 and the second pad 123 are made of PC material.

[0054] In this optional embodiment, bottom flange 121 serves as a bottom extension of side panel 12. Its inner side mates with the bottom surface of cell pack 11, and its outer side mates with the top surface of liquid cooling plate 2, forming a bottom support connection node for "cell pack 11 - side panel 12 - liquid cooling plate 2." To optimize the mechanical performance and thermal management efficiency of this node, a first backing strip 122 and a second backing strip 123 made of polycarbonate are positioned between the two contact surfaces. Polycarbonate is a high-performance engineering plastic that combines high strength and toughness. It can withstand mechanical stresses such as vibration and impact during module 1 assembly, transportation, or use, while also exhibiting excellent electrical insulation and heat resistance.

[0055] Alternatively, as Figure 4As shown, a top flange 124 is provided on the top of the side panel 12 , and the top flange 124 is used to support the structure on the top of the battery cell group 11 .

[0056] Specifically, the top of the side panel 12 can be folded inward to form a top flange 124. This top flange 124 serves as a support structure for the top of the battery cell group 11, primarily used to support top components such as the insulation board and busbars, and is particularly suitable for pouch cell applications. Furthermore, similar to the bottom flange 121, the top flange 124 is perpendicular to the side panel 12, and PC material pads can be placed on the inner and outer sides of the top flange 124.

[0057] Optionally, the outer side surface of the side plate 12 is provided with a heating film 3, and the inner side surface of the side plate 12 is provided with a PI film.

[0058] In this optional embodiment, the heating film 3 is positioned on the outer surface of the side panel 12 because the outer surface is away from the battery cell assembly 11. This facilitates the wiring of the heating film 3 to be led outside the module 1, thereby preventing interference with internal components such as the top flange 124 of the side panel 12. Furthermore, the heat generated by the heating film 3 is rapidly transferred to the inner surface through the metal substrate of the side panel 12, and then further transferred to the battery cells via the non-curing thermally conductive gel, forming an efficient heat transfer path from "heating film 3 - side panel 12 - gel for heat distribution," which has minimal impact on the heating rate.

[0059] At the same time, a PI film is provided on the inner side of the side panel 12. The English name of polyimide is Polyimide, abbreviated as PI, which is a high-performance polymer material with good electrical insulation performance. The PI film can be tightly fitted to the inner side of the side panel 12 through a hot pressing process to form a seamless uniform covering layer, thereby improving the electrical insulation performance between the side panel 12 and the battery cell group 11.

[0060] Alternatively, as Figure 2 and Figure 5 As shown, the module 1 further includes two end plates 14 , each of which has right-angled notches 141 disposed on both side edges adjacent to the side plates 12 . Both ends of the side plates 12 extend beyond the end surfaces of the cell group 11 , and the extensions 125 are engaged with the right-angled notches 141 .

[0061] In this optional embodiment, the end plates 14 at both ends of the module 1 are adjacent to the side edges of the side plates 12 and are provided with right-angled notches 141. The ends of the side plates 12 extend out of the end faces of the battery cell group 11. The protruding portions 125 are fitted into the right-angled notches 141 of the end plates 14 to achieve positioning and fixation of the side plates 12 and the end plates 14, which can be specifically connected by welding.

[0062] Alternatively, as Figure 1 and Figure 6As shown, the solid-state battery pack structure also includes a box body 4, a liquid cooling plate 2 is arranged on the top surface of the bottom plate of the box body 4, and the end plate 14 is connected to the liquid cooling plate 2 by fixing bolts 142.

[0063] In this optional embodiment, the solid-state battery pack structure includes a box body 4, a liquid cooling plate 2 integrated into the inner surface of the bottom plate of the box body 4, and an end plate 14 directly connected to the liquid cooling plate 2 via fixing bolts 142, thereby fixing the entire module 1 in the battery pack. Specifically, as Figure 6 As shown, two fixed ground beams 41 can be arranged in parallel on the top surface of the liquid cooling plate 2. The cross section of the fixed ground beam 41 is rectangular. The two end plates 14 at both ends of the module 1 are fixed to the corresponding fixed ground beams 41 by fixing bolts 142 respectively.

[0064] In addition, the liquid cooling plate 2 can adopt a channel structure, and the water inlet and outlet are arranged outside the box 4. The liquid cooling plate 2 adopts a channel structure design, and its inlet / outlet extends to the outside of the box 4, which is convenient for connection to an external thermal management system.

[0065] Specifically, the box body 4 serves as the outermost protective structure of the battery pack, and has both mechanical protection and structural support functions. The liquid cooling plate 2 is fitted on the top surface of the bottom plate of the box body 4 and is firmly fixed by mechanical connections such as screws. A flow channel for the circulation of coolant is provided inside the liquid cooling plate 2, and efficient heat exchange with the module 1 is achieved through the flow of coolant. During the thermal management process, the liquid cooling plate 2 has a two-way temperature control capability. In heating mode, the heat pump circuit of the electric vehicle is connected to the matching heat exchanger, the heat of the heat pump system is extracted and transferred to the battery cell group 11, thereby achieving active heating of the module 1; in cooling mode, the coolant flows through the flow channel of the liquid cooling plate 2, absorbs the heat generated by the operation of the battery cell group 11, and then releases the heat to the environment through the radiator outside the box body 4, thereby completing passive cooling.

[0066] It should be noted that the heating / cooling circuit design of the liquid cooling plate 2 is a mature technology in this field, such as being implemented through a heat pump system or an independent cooling circuit. The specific circuit structure is not an innovation of this structure, so it will not be described in detail.

[0067] Optionally, the liquid cooling plate 2 is made by a stamping and brazing plate process.

[0068] Alternatively, as Figure 1 and Figure 6 As shown, a transverse partition 42 and a longitudinal partition 43 are provided inside the box body 4. The transverse partition 42 and the longitudinal partition 43 divide the inner cavity of the box body 4 into a plurality of receiving chambers, and a plurality of modules 1 are arranged in each receiving chamber.

[0069] The present invention provides a vehicle comprising the above-mentioned solid-state battery pack structure. The technical improvements and technical effects of the vehicle are the same as those of the solid-state battery pack structure.

[0070] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A solid-state battery pack structure, characterized in that: Comprising a plurality of modules (1) and a liquid cooling plate (2), the module (1) comprising a battery cell group (11) and two side plates (12) arranged on both sides of the battery cell group (11); The bottom surfaces of the plurality of modules (1) are all fitted on the top surface of the liquid cooling plate (2), and the liquid cooling plate (2) is used to cool or heat the battery cell group (11) from the bottom; The plate surface of each side plate (12) is provided with a heating film (3), and the heating film (3) is used to heat the battery cell group (11) from the side.

2. The solid-state battery pack structure according to claim 1, characterized in that: A retaining ring (13) is provided between the side plate (12) and the corresponding side surface of the battery cell group (11), and a gap cavity enclosed by the side surface of the battery cell group (11), the side plate (12) and the retaining ring (13) is filled with a non-curing thermal conductive gel.

3. The solid-state battery pack structure according to claim 2, characterized in that: The retaining ring (13) is arranged along the side edge of the battery cell group (11) and is surrounded by foam.

4. The solid-state battery pack structure according to claim 1, characterized in that: The battery cell group (11) comprises a plurality of square solid-state battery cells, the plurality of solid-state battery cells are arranged in a thickness direction, and the side plates (12) are parallel to the arrangement direction of the solid-state battery cells.

5. The solid-state battery pack structure according to claim 1, characterized in that: The bottom of the side plate (12) is provided with a bottom flange (121), the bottom flange (121) is perpendicular to the side plate (12), the inner side surface of the bottom flange (121) is in contact with the bottom surface of the battery cell group (11), and the outer side surface of the bottom flange (121) is in contact with the top surface of the liquid cooling plate (2).

6. The solid-state battery pack structure according to claim 5, characterized in that: The gap between the bottom of the module (1) and the liquid cooling plate (2) is filled with non-curing thermal conductive gel.

7. The solid-state battery pack structure according to claim 1, characterized in that: The outer side surface of the side plate (12) is provided with a heating film (3), and the inner side surface of the side plate (12) is provided with a PI film.

8. The solid-state battery pack structure according to claim 1, characterized in that: The module (1) further comprises two end plates (14), wherein the end plates (14) are provided with right-angled notches (141) at both side edges adjacent to the side plates (12), and both ends of the side plates (12) extend beyond the end faces of the battery cell group (11), and the extension portions (125) are engaged and connected to the right-angled notches (141).

9. The solid-state battery pack structure according to claim 8, characterized in that: It also includes a box body (4), the liquid cooling plate (2) is arranged on the inner side of the bottom plate of the box body (4), and the end plate (14) is connected to the liquid cooling plate (2) via fixing bolts (142).

10. A vehicle, characterized in that: Comprising a solid-state battery pack structure as described in any one of claims 1-9.

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