Battery cell protection structure and battery cell assembly

Abstract

The utility model discloses a battery cell protection structure and a battery cell assembly, belongs to the technical field of batteries, and is designed for solving the problems of low heat dissipation efficiency and the like of an existing outer frame. The utility model discloses a battery cell protection structure, which comprises a shell, at least one battery cell protection layer and at least one battery cell protection layer, the buffer part is arranged on one side surface, back to the battery cell, of the shell; and the temperature adjusting part comprises a phase change material layer, and the temperature adjusting part can exchange heat with the battery cell. According to the battery cell protection structure and the battery cell assembly disclosed by the utility model, the phase change material layer capable of generating phase change within the set temperature range is filled in the shell, heat absorption, heat storage and heat release are realized through the phase change process of the phase change material layer, so that the temperature of the battery cell is adjusted, the battery cell can be ensured to be continuously positioned in a proper temperature environment, and the heat exchange efficiency is high; and the phase change material layer is sealed in the shell, so that the risk of leakage does not exist, and the use is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery core protection structure and a battery core assembly. Background Art

[0002] Lithium-ion battery cells can be mainly divided into soft-pack cells and metal-shell packaged cells according to the different outer layer structures. Among them, soft-pack cells use flexible materials (which can be but are not limited to aluminum-plastic films) as outer packaging. The advantage of soft-pack cells is that they can be made thinner and have better flexibility and heat dissipation.

[0003] The disadvantage of soft-pack batteries is that the flexible outer packaging cannot provide sufficient support, resulting in poor structural stability of the soft-pack batteries. To solve this problem, some existing soft-pack batteries are equipped with an outer frame, and the soft-pack batteries are installed inside the outer frame. In order to solve the problem that the outer frame will hinder the heat dissipation of the soft-pack batteries, some outer frames are filled with cooling water. When the soft-pack batteries heat up, the cooling water can exchange heat with the soft-pack batteries, improve the heat dissipation capacity of the soft-pack batteries, and avoid thermal runaway of the soft-pack batteries.

[0004] The defects of the existing external frame include: the cooling efficiency of the cooling water is low. When the temperature of the soft-pack battery cells rises rapidly, the cooling capacity of the cooling water is insufficient to respond in time; the cooling water needs to be replaced regularly, otherwise the cooling water will easily become smelly and moldy; a water change port needs to be opened on the external frame for regular replacement of the cooling water, and the water change port is prone to leakage, posing a safety hazard. Utility Model Content

[0005] The utility model aims to provide a battery core protection structure and a battery core assembly, which solves the problem of low heat dissipation efficiency of the existing outer frame and ensures that the battery core can be continuously in a suitable temperature environment.

[0006] To achieve this purpose, on the one hand, the utility model adopts the following technical solutions:

[0007] A battery cell protection structure includes: a shell for covering at least one outer wall surface of the battery cell; a buffer member arranged on a side of the shell facing away from the battery cell; and a temperature regulating part including a phase change material layer, the phase change material layer is sealed in the shell, and the temperature regulating part can exchange heat with the battery cell.

[0008] In one of the preferred embodiments, a shell cavity is opened in the shell, and the temperature regulating part is filled in the shell cavity; or, a hollow mounting part is provided on the wall surface of the shell facing the battery cell, the temperature regulating part is filled in the mounting part, and the mounting part is in contact with at least one of the outer wall surfaces of the battery cell.

[0009] In one preferred embodiment, the buffer member is an aerogel layer.

[0010] In one of the preferred embodiments, the shell includes a main shell portion, the main shell portion covers an outer wall surface of the battery cell, the temperature regulating portion is filled in a shell cavity opened in the main shell portion, and the buffer is arranged on the wall surface of the main shell portion facing away from the outer wall surface of the battery cell; or, the shell includes a main shell portion, the main shell portion covers an outer wall surface of the battery cell, an installation portion is arranged on the wall surface of the main shell portion facing the outer wall surface of the battery cell, the temperature regulating portion is filled in the installation portion, and the installation portion is in contact with the outer wall surface of the battery cell; the buffer is arranged on the wall surface of the main shell portion facing away from the outer wall surface of the battery cell.

[0011] In one of the preferred embodiments, the shell further includes one or more side shell parts connected to the main shell part, and the one or more side shell parts are used to correspondingly cover one or more other outer wall surfaces of the battery core.

[0012] In one of the preferred embodiments, a ridge is provided on the wall surface of the outer side wall of the shell facing away from the battery core, and the ridge is used to increase the strength of the shell.

[0013] In one of the preferred embodiments, at least two ridges are provided on the wall surface of the outer side wall of the shell facing away from the battery cell, a groove is formed between two adjacent ridges, the buffer is located in the groove, and the buffer protrudes from the ridge.

[0014] In one of the preferred embodiments, the number of the grooves is at least two, and the buffer member is disposed in only one of the two adjacent grooves.

[0015] In one of the preferred embodiments, a connector for connecting the battery cell is provided on the housing.

[0016] On the other hand, the utility model adopts the following technical solutions:

[0017] A battery cell assembly comprises a battery cell and the above-mentioned battery cell protection structure, wherein a shell of the battery cell protection structure covers at least one outer wall surface of the battery cell.

[0018] The shell of the battery protection structure disclosed by the utility model is filled with a phase change material layer that can undergo phase change within a set temperature range. The phase change process of the phase change material layer is used to absorb, store and release heat, thereby adjusting the temperature of the battery cell to ensure that the battery cell can be continuously in a suitable temperature environment with high heat exchange efficiency. Moreover, the phase change material does not need to be replaced and can be used for a long time, which is more convenient to use; the phase change material layer is sealed in the shell, there is no risk of leakage, and it is safer to use. In addition, a buffer is provided on the shell, which can play the role of impact resistance and buffering, improve the structural strength of the battery protection structure, and thus provide better protection for the battery cell.

[0019] The battery cell assembly disclosed in the utility model includes the above-mentioned battery cell protection structure, has a good temperature regulation effect, ensures that the battery cell can be continuously in a suitable temperature environment, has high heat exchange efficiency, is more convenient and safer to use; and the battery cell assembly has higher structural strength and structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the schematic diagrams of the battery cell protection structure provided in the first embodiment of the present utility model;

[0021] Figure 2 This is the second schematic diagram of the battery cell protection structure provided in the first embodiment of the utility model;

[0022] Figure 3 This is a front view of the battery cell protection structure provided in the first embodiment of the utility model;

[0023] Figure 4 This is one of the schematic diagrams of the combined structure of the housing and the temperature adjustment unit provided in the first embodiment of the present utility model;

[0024] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0025] Figure 6 This is the second schematic diagram of the combined structure of the housing and the temperature adjustment part provided in the first embodiment of the utility model;

[0026] Figure 7 It is a schematic diagram of the structure of the battery cell provided in the first embodiment of the utility model;

[0027] Figure 8 It is a structural schematic diagram of a battery core assembly provided in the second embodiment of the present utility model;

[0028] Fig. 9 It is a schematic diagram of the structure of two groups of unit elements stacked vertically provided in the second embodiment of the present utility model.

[0029] In the figure:

[0030] 1. Shell; 2. Battery cell; 3. Temperature regulating part; 4. Buffer; 11. Main shell part; 12. Side shell part; 13. Snap-fit ​​groove; 14. Protruding ridge; 15. Groove; 21. Battery cell body; 22. Snap-fitting ridge. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementation methods disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] Embodiment 1

[0038] This embodiment discloses a cell protection structure, which can be mounted on the outside of various cells to provide protection, and is particularly suitable for soft-pack cells. Figures 1 to 7 As shown, the battery protection structure includes a shell 1, a temperature regulating part 3 and a buffer 4. The temperature regulating part 3 includes a phase change material layer sealed in the shell 1, so that the temperature regulating part 3 can be connected with the battery 2 (such as Figure 8 As shown) for heat exchange; the buffer member 4 is arranged on the side of the shell 1 facing away from the battery cell 2, which can play the role of impact resistance and buffering, improve the structural strength of the battery cell protection structure, and thus provide better protection for the battery cell 2.

[0039] A shell cavity (not shown) is provided in the shell 1, and the temperature regulating part 3 is filled in the shell cavity. The processing process is to first prepare the shell 1 with a cavity structure, then fill the phase change material into the shell cavity to form the temperature regulating part 3, and finally weld a sealing plate at the opening of the shell cavity of the shell 1, so that the shell cavity forms a sealed structure. The specific shape and number of the shell cavity are not limited, and can be designed according to the shape of the shell 1 and the shape and volume of the temperature regulating part 3.

[0040] Of course, other structures can also be used as long as the phase change material can be placed in a sealed manner. For example, a hollow mounting portion (not shown) is provided on the wall surface of the housing 1 facing the battery cell 2, and the thermostat 3 is filled in the mounting portion. The specific shape of the mounting portion is not limited, as long as the thermostat 3 in the mounting portion can be in contact with at least one outer wall surface of the battery cell 2 to perform heat exchange.

[0041] The phase change material layer of the temperature regulating part 3 includes a phase change material that can undergo phase change within a set temperature range. The "set temperature range" can be but is not limited to the temperature range when thermal runaway occurs in the battery cell, usually between 40°C and 60°C. For soft-pack batteries, the preferred set temperature range is 45°C±5°C.

[0042] In this embodiment, the solid-liquid phase change of the phase change material is used as an example for explanation: the phase change material in the phase change material layer has a set phase change temperature. When the temperature of the battery cell 2 is higher than the lowest phase change temperature point, the phase change material begins to transform from a solid state to a liquid state; when all the phase change materials are transformed into a liquid state, the phase change process is completed. During this process, the phase change material is maintained between the lowest and highest points of the phase change temperature, and the heat of the battery cell 2 is absorbed by the temperature regulating part 3. Of course, if there is residual heat in the battery cell 2, it will be transferred to the outside of the shell 1 through the temperature regulating part 3, thereby effectively reducing the temperature of the battery cell 2. On the contrary, when the temperature of the battery cell 2 is lower than the highest phase change temperature point, the phase change material of the phase change material layer begins to transform from a liquid state to a solid state. When all the phase change materials are transformed into a solid state, the phase change process is completed. During this process, the temperature of the phase change material is maintained between the highest and lowest points of the phase change temperature, and the battery cell 2 absorbs heat and heats up. The temperature of the battery cell 2 can be regulated by the heat absorption, heat storage and heat release of the phase change material, so that the battery cell 2 is always in a suitable temperature environment. In this embodiment, the phase change material may be, but is not limited to, graphene and paraffin-based phase change materials to achieve solid-liquid phase change.

[0043] Of course, when the phase change material layer uses other phase change materials, gas-liquid and other transformations may also occur to absorb, store and release heat, thereby adjusting the temperature of the battery cell 2, which will not be elaborated here.

[0044] The shell of the battery protection structure can absorb, store and release heat through the phase change process of the phase change material layer, thereby adjusting the temperature of the battery 2 to ensure that the battery 2 can be continuously in a suitable temperature environment with high heat exchange efficiency. Moreover, the phase change material does not need to be replaced and can be used for a long time, which is more convenient to use; the shell cavity of the shell 1 is a sealed structure, and the sealed phase change material layer does not have the risk of leakage, which is safer to use.

[0045] The material of the shell 1 is not limited, as long as it can enhance the structural stability of the battery cell 2. Before reaching the phase change temperature, the temperature regulating part 3 made of graphene and paraffin-based phase change materials is in a solid state, has a certain strength and hardness, and can improve the structural stability of the battery cell 2 together with the shell 1, making the battery cell 2 safer to use.

[0046] The specific shape of the shell 1 is not limited, as long as it can cover at least one outer wall surface of the battery cell 2. In the present embodiment, the battery cell 2 is a soft-pack battery cell in the shape of a flat block (or plate), and the shell 1 includes a main shell portion 11 and at least one side shell portion 12, the side shell portion 12 is connected to the main shell portion 11, and the buffer 4 is arranged on the wall surface of the main shell portion 11 facing away from the outer wall surface of the battery cell 2. The main shell portion 11 covers one outer wall surface (top surface or bottom surface) of the battery cell 2, and one or more side shell portions 12 are used to cover one or more other outer wall surfaces of the battery cell 2. Among them, the top surface (or bottom surface) of the battery cell 2 refers to the outer wall surface with the largest area on the battery cell 2, and the other wall surfaces of the battery cell 2 refer to the surfaces connected to the outer wall surface with the largest area on the battery cell 2.

[0047] The shell cavity can be opened only on the main shell part 11, or can be opened on both the main shell part 11 and the side shell part 12, as long as sufficient heat exchange between the temperature regulating part 3 and the battery core 2 can be ensured. When the shell cavity is opened on both the main shell part 11 and the side shell part 12, the shell cavity can be a connected integral structure, or can be a plurality of independent sub-cavities.

[0048] When the thermostat 3 is filled in the mounting portion, the mounting portion is arranged on the wall surface of the main shell 11 facing the outer wall surface of the battery cell 2. After the thermostat 3 is filled, the mounting portion contacts at least one outer wall surface of the battery cell 2 to perform heat exchange. The buffer 4 is preferably arranged on the main shell 11 facing away from the battery cell 2 (such as Figure 8 On the outer wall of the housing 1, the housing 1 and the adjacent battery core 2 (as shown) can be better connected. Figure 8 shown) isolated.

[0049] When the shell 1 includes two side shell parts 12, the two side shell parts 12 are respectively connected to the opposite sides of the main shell part 11. The main shell part 11 and the two side shell parts 12 form a structure with a U-shaped cross-section, and the shell 1 covers the battery cell 2 from three directions. That is, the battery cell 2 is embedded in the three sides of the shell 1, and the installation structure between the shell 1 and the battery cell 2 is more secure, preventing the battery cell 2 from easily escaping from the shell 1. It can be understood that one battery cell 2 or multiple battery cells 2 can be placed in each shell 1, as long as the safe use of the battery cell 2 is not affected. In this embodiment, one battery cell 2 is placed in one shell 1 as an example for explanation.

[0050] The shell 1 has a simple structure and is easy to install, with low processing difficulty and cost; the three surfaces of the shell 1 are in contact with the battery cell 2, with a large contact area and high heat conduction efficiency. The shell 1 can quickly exchange heat with the battery cell 2 in a short time, and has a good temperature control effect on the battery cell 2, ensuring that the battery cell 2 can be continuously in a suitable temperature environment.

[0051] On the basis of the above structure, the housing 1 is provided with a connector for connecting the battery cell 2, and the connector may be, but is not limited to, a connecting slot, a connecting ridge, a connecting pit or a connecting bump provided on the wall of the housing 1 facing the battery cell 2. In this embodiment, a snap-in slot 13 is provided on the inner wall of the side shell 12, and accordingly, the battery cell 2 includes a battery cell body 21 and snap-in ridges 22 provided on opposite sides of the battery cell body 21, and the snap-in ridges 22 can be inserted into the snap-in slot 13 to achieve connection between the housing 1 and the battery cell 2.

[0052] The extending direction of the snap groove 13 is parallel to the plane where the main shell 11 is located. During installation, align the end of the snap rib 22 with the end of the snap groove 13, and push the battery body 21 in a direction parallel to the main shell 11 until the snap rib 22 completely slides into the snap groove 13, completing the installation of the battery 2 and the shell 1.

[0053] In order to further improve the structural stability of the housing 1, a ridge 14 is provided on a side of the main housing 11 away from the battery cell 2 (or the side facing away from the battery cell 2). The ridge 14 can increase the strength of the main housing 11, so that the main housing 11 will not be easily bent and has greater strength.

[0054] On the basis of the above structure, an insulating layer (not shown) is formed on at least part of the surface of the housing 1, and the insulating layer is at least located between the housing 1 and the battery cell 2 to prevent current conduction between the housing 1 and the battery cell 2. The specific method for forming the insulating layer is not limited. In this embodiment, the insulating layer is formed by spraying insulating paint, which can meet higher insulation withstand voltage requirements, has a wide range of applications, and is safer to use.

[0055] In this embodiment, the buffer 4 is an aerogel layer, and the aerogel layer includes an aerogel material. The aerogel layer has multiple functions: first, it can buffer the impact of the outside world, thereby preventing the battery cell 2 (such as Figure 8 The second is to prevent the heat on the shell 1 from being transferred to the adjacent structure (such as another adjacent battery cell 2), thereby preventing the heat from being transferred to the battery cell 2 (such as Figure 8 To avoid large-scale thermal runaway inside the battery pack and improve the safety of battery use.

[0056] The battery cell 2 (such as Figure 8 The plurality of cells (as shown in the figure) can be placed horizontally and then stacked in the longitudinal direction, or can be placed vertically and then stacked in the horizontal direction. The specific arrangement can be determined according to the use requirements. Regardless of whether the plurality of cells composed of cells with protective structures are stacked in the longitudinal direction or stacked in the horizontal direction, the buffer 4 can isolate the housing 1 where it is located from the adjacent cells 2, thereby preventing heat transfer.

[0057] The specific connection method between the buffer 4 and the housing 1 is not limited, as long as the buffer 4 can be stably connected to the housing 1. In this embodiment, the buffer 4 is fixed to the housing 1 by adhesive bonding, and the connection structure is firm, easy to operate, and low in cost.

[0058] In order to improve the stability of the installation of the buffer 4, the housing 1 is facing away from the battery cell 2 (such as Figure 8 At least two ridges 14 are arranged on the wall surface of the outer wall of the housing 1 (as shown), and a groove 15 is formed between two adjacent ridges 14. The buffer 4 is located in the groove 15, and the top of the buffer 4 protrudes from the ridge 14, so that the adjacent battery cells 2 will not contact the ridge 14, and the adjacent battery cells 2 are prevented from transmitting heat to the housing 1 where the ridge 14 is located through the ridge 14. The ridge 14 can limit the position of the buffer 4 from opposite sides, prevent the buffer 4 from lateral movement, and enable the buffer 4 to be stably connected to the housing 1.

[0059] On the basis of the above structure, at least two grooves 15 are provided on the shell 1, and only one of the two adjacent grooves 15 is provided with a buffer 4. That is, the grooves 15 are separated by patch buffers 4, which can reduce the material cost; the grooves 15 without aerogel are filled with air, which also has a good thermal insulation effect. It should be noted that the specific shape of the buffer 4 is not limited, as long as the shell 1 can avoid contact with the adjacent battery cell 2. In this embodiment, the buffer 4 is in sheet form, which is easy to process and saves materials.

[0060] When thermal runaway occurs, the groove 15 filled with air has a certain degree of deformation ability, allowing the battery cell to release pressure in a certain direction. Under the condition of the same thickness, the heat insulation ability of air is stronger than that of the buffer 4, and the effect of heat insulation and fire resistance is better. Placing the buffer 4 at intervals not only improves the structural strength, but also reduces the heat conduction path of heat to the surrounding battery cells, slows down the rate of heat conduction, and improves the overall safety of the battery.

[0061] The shape and height of the ridges 14 are not specifically limited. In view of the fact that the two sides of the shell 1 are usually subjected to greater forces, in this embodiment, the ridges 14 on the two sides are higher than the ridges 14 in the middle, so that the two sides of the shell 1 have greater structural strength. The ridges 14 on the two sides will not contact the battery cells 2 of the adjacent battery pack, so the ridges 14 on the two sides will not transfer heat with the adjacent battery packs even if they are slightly higher. The specific height difference of the ridges 14 is not limited. In this embodiment, the ridges 14 on the two sides are 0.5 mm higher than the ridges 14 in the middle. While ensuring sufficient strength, the height difference between all the ridges 14 is minimized to reduce the occupied space, which is conducive to the miniaturization of the battery.

[0062] Embodiment 2

[0063] like Figure 8As shown, the battery cell assembly includes a battery cell 2 and a battery cell protection structure, the protection structure includes a shell 1, a temperature regulating part 3 and a buffer 4, the shell 1 covers at least one outer wall surface of the battery cell 2, and the temperature regulating part 3 can exchange heat with the battery cell 2. The temperature regulating part 3 has a good temperature regulating effect on the battery cell 2, ensuring that the battery cell 2 can be continuously in a suitable temperature environment, with high heat exchange efficiency, more convenient and safer use; the battery cell assembly as a whole has higher structural strength and structural stability.

[0064] During processing, the shell 1 is prepared first, and then the phase change material is filled into the shell cavity (not shown) of the shell 1 to form the temperature regulating part 3, or the temperature regulating part 3 is wrapped and filled in the shell cavity, and the temperature regulating part 3 is sealed in the shell cavity after welding the sealing plate; the battery cell 2 is inserted into the space enclosed by the shell 1, and finally the buffer part 4 is pasted on the shell 1 to complete the assembly.

[0065] Fig. 9 As shown, the battery cell with a protective structure can be placed horizontally and then two groups of single components can be stacked vertically. Because the buffer 4 protrudes from the ridge 14, the battery cell 2 located on the upper side will not contact the ridge 14 on the shell 1 located below after vertical stacking, thereby preventing the battery cell 2 located on the upper side from transmitting heat to the shell 1 located below through the ridge 14, making it safer to use. It can be understood that when three or more groups of single components are stacked vertically or three or more groups of single components are stacked horizontally, the buffer 4 can achieve the following. Fig. 9 As shown in the figure, the buffer 4 isolates the adjacent battery cells 2 from the housing 1 to prevent heat transfer.

[0066] The battery cell assembly may include a battery cell protection structure and a battery cell 2, or may include a battery cell protection structure and two or more battery cells 2, all of the battery cells 2 are arranged in a row, a column or a matrix, and the shell 1 of the battery cell protection structure covers at least one outer wall surface of the overall structure composed of all the battery cells 2.

[0067] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, but may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A cell protection structure, characterized in that: include: A shell (1) used to cover at least one outer wall surface of a battery core (2); a buffer member (4) arranged on a side of the housing (1) facing away from the battery core (2); and The temperature regulating part (3) comprises a phase change material layer, the phase change material layer is sealed in the shell (1), and the temperature regulating part (3) can perform heat exchange with the battery core (2).

2. The battery cell protection structure according to claim 1, characterized in that: The shell (1) has a shell cavity, and the temperature adjustment part (3) is filled in the shell cavity; or, A hollow mounting portion is provided on the wall surface of the shell (1) facing the battery core (2), the temperature regulating portion (3) is filled in the mounting portion, and the mounting portion is in contact with at least one of the outer wall surfaces of the battery core (2).

3. The battery cell protection structure according to claim 1, characterized in that: The buffer component (4) is an aerogel layer.

4. The battery cell protection structure according to claim 1, characterized in that: The shell (1) comprises a main shell portion (11), the main shell portion (11) covers an outer wall surface of the battery core (2), the temperature regulating portion (3) is filled in a shell cavity opened in the main shell portion (11), and the buffer member (4) is arranged on a wall surface of the main shell portion (11) facing away from the outer wall surface of the battery core (2); or, The shell (1) comprises a main shell portion (11), the main shell portion (11) covers an outer wall surface of the battery cell (2), a mounting portion is arranged on the wall surface of the main shell portion (11) facing the outer wall surface of the battery cell (2), the temperature regulating portion (3) is filled in the mounting portion, and the mounting portion is in contact with the outer wall surface of the battery cell (2); the buffer member (4) is arranged on the wall surface of the main shell portion (11) facing away from the outer wall surface of the battery cell (2).

5. The battery cell protection structure according to claim 4, characterized in that: The shell (1) further comprises one or more side shell parts (12) connected to the main shell part (11), and the one or more side shell parts (12) are used to cover one or more other outer wall surfaces of the battery core (2) accordingly.

6. The battery cell protection structure according to claim 1, characterized in that: A ridge (14) is provided on the wall surface of the outer side wall of the shell (1) facing away from the battery core (2), and the ridge (14) is used to increase the strength of the shell (1).

7. The battery cell protection structure according to claim 6, characterized in that: At least two ridges (14) are arranged on the wall surface of the outer side wall of the shell (1) facing away from the battery core (2), a groove (15) is formed between two adjacent ridges (14), the buffer (4) is located in the groove (15), and the buffer (4) protrudes from the ridges (14).

8. The battery cell protection structure according to claim 7, characterized in that: The number of the grooves (15) is at least two, and among two adjacent grooves (15), only one of the grooves (15) is provided with the buffer member (4).

9. The battery cell protection structure according to claim 1, characterized in that: The housing (1) is provided with a connector for connecting the battery core (2).

10. A battery cell assembly, comprising a battery cell (2), characterized in that: It also comprises a battery cell protection structure as claimed in any one of claims 1 to 9, wherein a shell (1) of the battery cell protection structure covers at least one outer wall surface of the battery cell (2).

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