Thermal battery pack

Abstract

The utility model relates to battery technology field especially, more particularly to a kind of thermal insulation battery package, including box, electric core module, epoxy plate and first MPP bubble cotton, wherein, the electric core module is located in the inside of the box;The epoxy plate is located between the end plate module bottom surface of the electric core module and the inner bottom surface of the box, and the epoxy plate outside is wrapped with first silica gel bubble cotton;The first MPP bubble cotton is located between the electric core module bottom surface of the electric core module and the inner bottom surface of the box.The utility model proposes a kind of thermal insulation battery package, it is reduced heat loss by setting heat insulation structure in the bottom area of electric core module and module end plate area, solve the problem that the heat loss of existing thermal insulation battery package is big, and the problem of poor thermal insulation performance.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a heat-insulating battery pack. Background Technology

[0002] In low-temperature environments, the electrochemical performance of batteries deteriorates significantly, leading to reduced output power, decreased charging efficiency, and potentially even safety issues. To improve battery performance under low-temperature conditions, battery packs with thermal insulation functions have been developed in the prior art. For example, a thermally insulated battery pack is disclosed in utility model patent application CN219476810U.

[0003] However, existing insulated battery packs still have shortcomings in their structural design: the bottom area of ​​the battery cell module and the bottom area of ​​the end plate lack effective heat insulation measures, causing heat to dissipate quickly through these parts, resulting in poor overall insulation of the battery pack and making it difficult to meet the usage requirements in extreme low temperature environments. Utility Model Content

[0004] In view of this, the present invention proposes a heat-insulating battery pack, which reduces heat loss by setting heat insulation structures in the bottom area of ​​the cell module and the end plate area of ​​the module, thereby solving the problems of large heat loss and poor heat insulation performance of existing heat-insulating battery packs.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a thermally insulated battery pack, including a housing, a battery cell module, an epoxy board, and a first MPP foam, wherein... The battery cell module is located inside the housing; The epoxy board is disposed between the bottom surface of the end plate module of the battery cell module and the bottom surface of the inner box, and the epoxy board is wrapped with a first silicone foam. The first MPP foam is disposed between the bottom surface of the battery cell module and the bottom surface of the housing.

[0006] Based on the above technical solutions, preferably, the first silicone foam is in the shape of a square tube, wherein... The top surface of the first silicone foam is fixedly connected to the bottom surface of the end plate module of the battery cell module, and the bottom surface abuts against the bottom surface of the box body.

[0007] Based on the above technical solutions, preferably, the top surface of the first MPP foam is fixedly connected to the bottom surface of the battery cell module of the battery cell module, and the bottom surface is fixedly connected to the bottom surface of the box body.

[0008] Based on the above technical solutions, preferably, a clearance gap is provided between the side of the battery cell module and the side of the housing.

[0009] Based on the above technical solutions, preferably, a PC sheet is sandwiched between the battery cell module and the end board module of the battery cell module.

[0010] Based on the above technical solution, preferably, a second MPP foam is provided between the PC sheet and the end board module of the battery cell module, wherein, The second MPP foam is fixedly connected to the PC sheet on one side and to the end plate module of the battery cell module on the other side. The PC sheet is fixedly connected to the battery cell module of the battery cell module.

[0011] Based on the above technical solutions, preferably, the battery cell module of the battery cell module includes multiple horizontally stacked battery cells, wherein, A second silicone foam is sandwiched between adjacent battery cells.

[0012] Based on the above technical solutions, preferably, the bottom surface of the box body, corresponding to the area of ​​the epoxy board, protrudes upward to form an end plate support platform, wherein... The top of the end plate support platform abuts against the bottom surface of the first silicone foam.

[0013] Based on the above technical solutions, preferably, a clearance gap is provided between the side of the battery cell module and the side of the end plate support platform of the battery cell module.

[0014] Based on the above technical solutions, preferably, a guide slope is provided on the lower end of the PC sheet and on the side near the end plate support platform.

[0015] The heat-insulating battery pack of this utility model has the following advantages over the prior art: (1) By setting an epoxy board wrapped with a first silicone foam at the bottom of the end plate module of the cell module and setting a first MPP foam at the bottom of the cell module, targeted heat insulation is provided for the end plate area and the cell area respectively, effectively blocking the heat conduction path at the bottom of the battery pack, reducing heat loss from the bottom of the box, and improving the overall heat preservation performance.

[0016] (2) By setting clearance gaps between the side of the battery cell module and the side of the housing, and by setting clearance gaps between the side of the battery cell module and the side of the end plate support platform, it is easy to form an air insulation layer, reduce heat conduction in the corresponding area, and improve the lateral insulation capacity. At the same time, these gaps reserve space for the thermal expansion and contraction of the battery cell, and avoid mechanical stress caused by structural constraints.

[0017] (3) By sandwiching a PC sheet between the cell module and the end plate module, not only is the rigidity of the internal structure of the module enhanced, but it also serves as an additional thermal barrier layer to slow down the conduction of heat from the cell to the end plate, thereby further optimizing the internal thermal management of the module. At the same time, a second MPP foam is set between the PC sheet and the end plate module to form a flexible thermal insulation buffer layer. While maintaining the rigid connection between the PC sheet and the cell module, it blocks the direct heat conduction path between the end plate module and the cell, effectively suppressing heat loss through the end plate structure.

[0018] (4) By stacking multiple cells laterally and sandwiching a second silicone foam between adjacent cells, it not only serves as a buffer and vibration damping mechanism, but also forms a continuous thermal insulation barrier between cells, reducing thermal crosstalk between cells and reducing overall heat loss to the external environment, thereby improving the temperature uniformity and heat preservation efficiency inside the module.

[0019] (5) By providing a guide slope on the side of the PC sheet near the end plate support, a guiding effect is provided when assembling the battery cell module, so that the module can fall into the predetermined position of the box quickly and accurately, improving assembly efficiency and consistency, while avoiding scratching the heat insulation material or the surface of the battery cell during the assembly process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a top view of a thermally insulated battery pack according to the present invention; Figure 2 for Figure 1 Sectional view along axis AA; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a partial 3D view of the battery cell module; Figure 5 This is a partial exploded view of the battery cell module; In the diagram: 1. Housing; 2. Battery cell module; 3. Epoxy board; 4. First MPP foam; 11. End plate support platform; 21. PC sheet; 22. Second MPP foam; 23. Battery cell; 24. Second silicone foam; 31. First silicone foam; 2101. Guide slope. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, 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 the embodiments of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0028] like Figure 1-5 As shown, the present invention provides a thermally insulated battery pack, comprising a housing 1, a battery cell module 2, an epoxy board 3, and a first MPP foam 4.

[0029] The battery cell module 2 is installed inside the housing 1. The battery cell module 2 consists of a battery cell module in the middle and end plate modules at both ends. The battery cell module is formed by horizontally stacking multiple battery cells 23. The end plate modules are metal or high-strength plastic components and are tied and fixed to the battery cell module by steel straps.

[0030] An epoxy board 3 is installed between the bottom surface of the end plate module of the battery cell module 2 and the inner bottom surface of the housing 1. The epoxy board 3 is completely covered with a first silicone foam 31. At the same time, a first MPP foam 4 is installed between the bottom surface of the battery cell module of the battery cell module 2 and the inner bottom surface of the housing 1.

[0031] In this structure, the epoxy board 3 and the first silicone foam 31 together form a flexible and heat-insulating composite support for the end plate area, while the first MPP foam 4 provides lightweight and efficient heat insulation and support for the bottom of the cell module. The two work together to implement precise heat insulation for different functional areas, effectively blocking the heat conduction path at the bottom of the battery pack and reducing heat loss through the bottom surface of the housing 1, thereby significantly improving the overall heat insulation performance.

[0032] Based on the above structure, the first silicone foam 31 is designed as a square tube, with its top surface fixedly connected to the bottom surface of the end plate module of the battery cell module 2 by adhesive bonding, and its bottom surface tightly abutting against the inner bottom surface of the housing 1. An epoxy board 3 is embedded and bonded to the cylindrical inner cavity of the first silicone foam 31, and the two together form an integrated composite thermal insulation support plate. Figure 2 As shown, each end of the battery cell module has an end plate module, and the battery cell module and the two end plate modules are bound together with steel straps to form a complete battery cell module 2. Each end plate module has a heat insulation support unit at its bottom, consisting of an epoxy board 3 and an outer layer of silicone foam 31, thereby achieving structural support and efficient heat insulation at both ends of the module simultaneously.

[0033] The top surface of the first MPP foam 4 is fixedly connected to the bottom surface of the battery cell module 2 by adhesive bonding, and the bottom surface is also firmly bonded to the inner bottom surface of the housing 1. This double-sided fixing method ensures that the first MPP foam 4 will not shift or fall off under vehicle vibration or temperature cycling conditions, and always maintains a continuous and complete heat insulation layer, avoiding the formation of thermal bridges due to local gaps. This ensures long-term and stable high-efficiency heat preservation in the bottom area of ​​the battery cell module and reduces heat loss.

[0034] A clearance gap is provided between the side of the cell module 2 and the side of the housing 1. The width of this gap is designed according to the maximum expansion of the cell 23 under extreme temperatures. This gap provides sufficient space for the thermal expansion and contraction of the cell module 2, avoiding damage to the cell 23 due to mechanical stress caused by structural constraints. It also forms a static air layer in the side, using the low thermal conductivity of air to form a natural heat insulation barrier, effectively reducing heat conduction between the side wall of the housing 1 and the cell module 2, and improving the lateral heat preservation capability of the battery pack.

[0035] Based on the above structure, a PC sheet 21 is sandwiched between the battery cell module and the end plate module of the battery cell module 2. The PC sheet 21 is made of high-rigidity polycarbonate material and is bonded and fixed to the battery cell module of the battery cell module 2. The PC sheet 21 enhances the overall structural rigidity of the battery cell module 2, suppresses deformation of the module during transportation or use, and also forms an additional thermal barrier layer between the battery cell module and the end plate module due to its low thermal conductivity, slowing down the conduction of heat towards the end plate, optimizing the heat flow distribution inside the module, and improving thermal management efficiency.

[0036] A second MPP foam 22 is provided between the PC sheet 21 and the end plate module of the battery cell module 2. One side of the second MPP foam 22 is bonded and fixed to the PC sheet 21, and the other side is bonded and fixed to the end plate module of the battery cell module 2. The second MPP foam 22 forms a flexible heat insulation buffer layer between the end plate module and the battery cell 23, completely blocking direct contact between metal or high thermal conductivity structural components, effectively inhibiting heat loss to the outside through the end plate structure, and further improving the heat preservation performance.

[0037] Based on the above structure, a second silicone foam 24 is sandwiched between adjacent battery cells 23. This foam has good elasticity and low thermal conductivity, which can absorb vibration and shock during vehicle operation, protecting the battery cells 23 from mechanical damage. On the other hand, it forms a continuous thermal insulation barrier between the battery cells 23, reducing thermal crosstalk between the cells and reducing overall heat radiation and conduction losses to the environment, thereby improving the temperature uniformity inside the module and the overall heat preservation efficiency.

[0038] The area on the bottom inner surface of the housing 1 corresponding to the epoxy board 3 protrudes upwards to form an end plate support platform 11. The top plane of the end plate support platform 11 abuts against the bottom surface of the first silicone foam 31 that wraps the epoxy board 3, providing a precise and stable support reference for the epoxy board 3. This structure ensures that the thermal insulation components do not sink or deform during long-term use, maintaining the designed thermal insulation gap. At the same time, it increases the local rigidity of the bottom of the housing 1, enhances the load-bearing capacity of the end plate module, and ensures the long-term reliability of the thermal insulation structure.

[0039] A clearance gap is provided between the side of the battery cell module 2 and the side of the end plate support 11. The width of the gap is determined based on the thermal expansion of the battery cell 23 and the assembly tolerance. This not only avoids interference or compression between the battery cell module and the end plate support 11 when it is thermally expanded, thus preventing structural damage, but also forms an additional air insulation layer around the end plate support 11, further reducing heat conduction in this critical support area and enhancing the local insulation effect.

[0040] A guide slope 2101 is provided on the lower end of the PC sheet 21 and on the side near the end plate support 11. When the battery cell module 2 is installed into the housing 1, the guide slope 2101 first contacts the edge of the end plate support 11, guiding the entire module to slide smoothly into the predetermined installation position along the slope, improving assembly efficiency and positioning accuracy, ensuring that the epoxy board 3, the first silicone foam 31 and the end plate support 11 are accurately aligned, and at the same time avoiding the edges of the PC sheet 21 or the battery cell 23 from scratching the first silicone foam 31, the second silicone foam 24 and other flexible heat insulation materials during the assembly process, protecting the integrity of the heat insulation structure, and ensuring that the heat insulation performance does not decrease due to assembly damage.

[0041] The method of using the heat-insulating battery pack of this utility model is as follows: In manufacturing the battery cell module 2, multiple battery cells 23 are first stacked horizontally, and a second silicone foam 24 is bonded and fixed between adjacent battery cells 23 to form a battery cell module. Then, end plate modules are installed at both ends of the battery cell module, and a PC sheet 21 and a second MPP foam 22 are sequentially bonded and fixed between the end plate modules and the battery cell module. The PC sheet 21 is attached to the side wall of the battery cell module, and the second MPP foam 22 is sandwiched between the PC sheet 21 and the end plate modules. Finally, the two end plate modules and the battery cell module are bundled and secured together with steel straps to form a structurally stable battery cell module 2 with multiple heat insulation functions.

[0042] Before installing the battery cell module 2 into the housing 1, an epoxy board 3 is first glued to the bottom of each end plate module. The epoxy board 3 is wrapped with a first silicone foam 31, forming an integrated heat insulation support unit. Next, a first MPP foam 4 is glued to the bottom surface of the battery cell module, and adhesive is evenly applied to its bottom surface. Then, the assembled battery cell module 2 is carefully placed into the housing 1 and allowed to fall slowly until the bottom surface of the first MPP foam 4 is fully attached to and bonded to the inner bottom surface of the housing 1.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thermally insulated battery pack, characterized in that: It includes a housing (1), a battery cell module (2), an epoxy board (3), and a first MPP foam (4), wherein, The battery cell module (2) is located inside the housing (1); The epoxy board (3) is located between the bottom surface of the end plate module of the battery cell module (2) and the bottom surface of the inner box (1), and the epoxy board (3) is wrapped with a first silicone foam (31). The first MPP foam (4) is located between the bottom surface of the battery module of the battery module (2) and the inner bottom surface of the housing (1).

2. The thermal insulation battery pack as described in claim 1, characterized in that: The first silicone foam (31) is in the shape of a square tube, wherein, The top surface of the first silicone foam (31) is fixedly connected to the bottom surface of the end plate module of the battery cell module (2), and the bottom surface abuts against the bottom surface of the inner box (1).

3. The thermal insulation battery pack as described in claim 1, characterized in that: The top surface of the first MPP foam (4) is fixedly connected to the bottom surface of the battery module of the battery module (2), and the bottom surface is fixedly connected to the inner bottom surface of the box (1).

4. The thermal insulation battery pack as described in claim 1, characterized in that: A clearance gap is provided between the side of the battery cell module (2) and the side of the housing (1).

5. A thermally insulated battery pack as described in any one of claims 1-4, characterized in that: The battery cell module (2) has a PC chip (21) sandwiched between the battery cell module and the end plate module.

6. A thermally insulated battery pack as described in claim 5, characterized in that: A second MPP foam (22) is provided between the PC sheet (21) and the end plate module of the battery cell module (2), wherein, The second MPP foam (22) is fixedly connected to the PC sheet (21) on one side and fixedly connected to the end plate module of the battery cell module (2) on the other side. The PC sheet (21) is fixedly connected to the battery cell module of the battery cell module (2).

7. A thermally insulated battery pack as described in claim 5, characterized in that: The battery cell module (2) comprises multiple horizontally stacked battery cells (23), wherein, A second silicone foam (24) is sandwiched between adjacent battery cells (23).

8. A thermally insulated battery pack as described in claim 5, characterized in that: The inner bottom surface of the box (1) and the area corresponding to the epoxy board (3) protrudes upward to form an end plate support platform (11), wherein... The top of the end plate support platform (11) abuts against the bottom surface of the first silicone foam (31).

9. A thermally insulated battery pack as described in claim 8, characterized in that: An avoidance gap is provided between the side of the battery cell module (2) and the side of the end plate support platform (11).

10. A thermally insulated battery pack as described in claim 8, characterized in that: The lower end of the PC sheet (21) and the side near the end plate support (11) are provided with a guide slope (2101).

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