Battery module and electronic device

Abstract

To provide a battery module capable of effectively absorbing expansion displacement of cells, especially expansion displacement of the outermost cell, reducing expansion force generated by the cells on a side plate, and improving safety of the battery module, and provide an electronic device with improved safety by applying the battery module.SOLUTION: A battery module includes a frame, a cell 2, a position-limiting member 3, and a buffer member 4, and a plurality of cells are stacked in parallel within the frame. The position-limiting member is disposed within the frame, divides the frame into a plurality of spaces, and uniformly arranges the cells. The plurality of buffer members are arranged between adjacent cells and / or between the cells and the frame.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to battery modules and electronic devices.

Background Art

[0002] As the core of three important technologies of new energy vehicles, power batteries have gradually attracted attention. The swelling of the cells in the module is one of the problems that need to be solved quickly. The swelling of the cells occurs not only when the battery undergoes thermal runaway or aging, but also during normal charging and discharging. Due to the swelling of the cells, deformation occurs in other structures inside the power battery.

[0003] As one of the solutions to solve the safety problem, all-solid-state batteries have been developed, and the risk of thermal runaway of cells containing liquids has been significantly reduced. However, the cells of all-solid-state battery modules still expand during the electrochemical reaction process. The volume increase caused by the swelling of the cells and the squeezing force on the surrounding structures caused by the swelling of the cells should not be ignored. The deformation displacement and thrust generated by the swelling of all internal cells are transmitted to and accumulated in the outermost cell, so finally, a very large thrust is applied to the module side plate from the outermost cell. Since the conventional side plate is a single rigidly fixed plate, it cannot be guaranteed that it can completely resist or absorb the thrust when such a thrust is applied to the side plate. Therefore, deformation, cracks of the side plate, deformation and failure of the thermal conductive adhesive, structural adhesive, tab welding, etc. on the module housing, and even connection breakage of the side plate and damage of the module may occur.

[0004] Therefore, it is necessary to develop a battery module to solve the above problems.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a battery module that can effectively absorb the expansion displacement of cells, particularly the expansion displacement of the outermost cells, reduce the expansion force on the side plates caused by the cells, and improve the safety of the battery module.

[0006] Another object of the present invention is to provide an electronic device. By applying the above-described battery module to an electronic device, the expansion of the battery module can be absorbed, the performance of the battery module can be stabilized, and the safety of the electronic device can be improved.

[0007] To achieve the above object, the following technical solutions are provided.

Means for Solving the Problems

[0008] In a first aspect, a battery module is provided that includes a frame, a plurality of cells, at least one position-limiting member, and a plurality of buffer members. The cells are stacked in parallel within the frame. The position-limiting member is disposed within the frame and divides the frame into a plurality of spaces to uniformly arrange the cells. The buffer members are respectively disposed between adjacent cells and / or between the cells and the frame.

[0009] As an alternative embodiment of the battery module, it further includes an energy-absorbing member, and the energy-absorbing member is disposed at a position adjacent to the position-limiting member.

[0010] As an alternative embodiment of the battery module, the energy-absorbing member includes a plurality of energy-absorbing portions, the energy-absorbing portions have the same shape, and are spaced apart on the energy-absorbing member.

[0011] As an alternative embodiment of the battery module, each energy-absorbing portion is formed in a protruding shape, and adjacent energy-absorbing portions protrude in opposite directions.

[0012] As an alternative embodiment of the battery module, both sides of the position-limiting member are provided with energy-absorbing members, and the two energy-absorbing members provided on both sides of the position-limiting member are symmetric with respect to the position-limiting member.

[0013] As an alternative embodiment of the battery module, it further includes a positioning member. Since the positioning member connects the energy-absorbing member and the position-limiting member in a movable manner, the energy-absorbing member can approach or move away from the position-limiting member within a certain distance along the direction in which the cells are arranged.

[0014] As an alternative embodiment of the battery module, each buffer member includes an outer frame portion and a buffer portion, and the hardness of the outer frame portion is greater than that of the buffer portion.

[0015] As an alternative embodiment of the battery module, the frame includes a bottom plate and an upper cover, and at least one of the bottom plate and the upper cover is provided with a positioning groove for embedding and positioning at least a part of the position-limiting member.

[0016] As an alternative embodiment of the battery module, each space divided by the position-limiting member has 3 to 9 cells respectively.

[0017] In a second aspect, there is provided an electronic device including the above-described battery module.

[0018] Compared with the related art, the present invention has the following beneficial effects:

[0019] The battery module provided by the present invention includes a frame, a plurality of cells, at least one position-limiting member, and a plurality of buffer members. By utilizing the elastic deformation of the buffer members to absorb the expansion amount of the cells, the outward displacement caused by the expansion of the cells can be reduced. At the same time, since the position-limiting member divides the frame into a plurality of independent spaces, the total amount of displacement generated by the expansion of the cells in the module is separated into various spaces, and the expansion force generated by the expansion displacement is also shared by various position-limiting members. In this way, the expansion displacement accumulated in the outermost cell is reduced, and the thrust applied to the side wall due to the expansion displacement is reduced, so that the tab welding part of the outermost cell can be effectively prevented from rupturing and failing due to excessive expansion displacement, thereby greatly improving the safety of the battery module.

Advantages of the Invention

[0020] The electronic device provided by the present invention can reduce the amount of thermal expansion of the battery module by applying the above-mentioned battery module to the electronic device, so that the performance of the battery module can be made more stable and the safety of the electronic device can be improved.

Brief Description of the Drawings

[0021] The accompanying drawings are included to further understand the principles of the present invention, are incorporated herein, and form a part thereof. The drawings illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0022]

Figure 1

Figure 2

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Figure 8

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Figure 11

Figure 12

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Figure 14

Embodiments for Carrying Out the Invention

[0023] Hereinafter, in order to further clarify the objectives, technical solutions, and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be described in more detail with reference to the drawings of this embodiment. Of course, the following embodiments are part of, but not all of, the embodiments of the present invention. The components in the embodiments of the present invention described and illustrated in the drawings of this specification may be arranged and designed in various shapes.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention, but merely shows selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained without creative efforts by those skilled in the art are included in the protection scope of the present invention.

[0025] It should be noted that since the same reference numerals and characters represent the same items in the following drawings, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0026] In the description of the present invention, it should be noted that terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is normally arranged during use. The above terms are used for the convenience or simplicity of explaining the present invention, and do not indicate or imply that the specified device or component is in a specific orientation and is structured and operated in a specific orientation, so it should not be understood as a limitation to the present invention.

[0027] In the description of the present invention, it should be noted that unless specifically defined and limited, the terms "arrangement" and "connection" should be understood to have a broad meaning. For example, these may refer to fixed connection, removable connection, or integral connection, and the connection may be either mechanical connection or electrical connection. Those skilled in the art can define the specific meaning of the above terms in the present invention according to specific situations.

[0028] In the present invention, unless otherwise specifically defined and limited, the fact that the first feature is disposed "above" or "below" the second feature may include that the first feature is in direct contact with the second feature, or may include that they are not in direct contact but are in contact via another feature therebetween. Further, the fact that the first feature is disposed "above", "upper part", and "above" the second feature may include that the first feature is disposed directly above and obliquely above the second feature, or may mean that the first feature is simply at a higher level than the second feature. The fact that the first feature is disposed "below", "lower part", and "below" the second feature may include that the first feature is disposed directly below and obliquely below the second feature, or may mean that the first feature is simply at a lower level than the second feature.

[0029] Hereinafter, embodiments of the present invention will be described in detail by taking the accompanying drawings as examples. In the present text, the same or similar reference numerals indicate the same or similar elements, or elements having the same or similar functions. Hereinafter, the embodiments described with reference to the accompanying drawings are merely examples and are used for explaining the present invention, and should not be construed as limiting the present invention.

[0030] FIG. 1 shows the basic structure of the structure of a battery module according to one embodiment of the present invention. FIG. 2 shows the internal structure of the battery module. Referring to FIGS. 1 and 2, the battery module in the embodiment of the present invention includes a frame 1. The frame 1 includes a bottom plate 11, an upper cover 12, a left side plate 13, a right side plate 14, a front end plate 15, and a rear end plate 16. The above-described components are configured in a rectangular box shape. A plurality of cells 2 are arranged inside the frame 1. The cell 2 is substantially a rectangular package. The surface of the long side is parallel to the length direction, the thickness direction contacts the bottom plate 11, and the length direction is the same as the extending direction of the left side plate 13 and the right side plate 14, and they are stacked and arranged in the frame 1. The outer surfaces of the left side plate 13 and the right side plate 14 also have hoisting ribs protruding outward to lift the entire battery module. Busbar components having a lattice structure are arranged inside the front end plate 15 and the rear end plate 16 to fix the corresponding output stages.

[0031] For convenience of explanation, hereinafter, "side plate" refers to "left side plate 13" and "right side plate 14", and "end plate" refers to "front end plate 15" and "rear end plate 16".

[0032] The frame 1 of the battery module of the present invention also includes a position-limiting member 3 therein. As shown in FIG. 1, the position-limiting member 3 is in the shape of a long plate and is fixed inside the battery module so as to be parallel to the left side plate 13 and the right side plate 14. By installing such a position-limiting member 3, the inside of the frame 1 is divided into a plurality of spaces. Therefore, a plurality of cells 2 that were originally arranged in order to form a stack are divided into a plurality of cell groups, and various cell groups are separated by the fixedly arranged position-limiting member 3. When the cell 2 expands, the expansion force and expansion displacement generated by the cell 2 are isolated by the position-limiting member 3 within the independent space where the cell group is located. The fixedly arranged position-limiting member 3 resists the expansion force generated by the cell group within the space separated by the position-limiting member 3, thereby preventing the expansion force and expansion displacement from being transmitted to other battery groups. Even if the expanded cell 2 is in the space separated by the side plate and the position-limiting member 3, since the number of cells 2 in one separation space is limited, the generated expansion force and expansion displacement do not accumulate to a range that the side plate cannot withstand. In this way, it is possible to prevent the tab welding portion of the outermost cell 2 from rupturing and failing due to excessive expansion displacement. At the same time, since the expansion force applied to the side plate in the expansion direction of the cell 2 can be effectively reduced, the safety of the battery module can be greatly improved.

[0033] Considering the strength limits of the side plate and the position-limiting member 3, the number of the position-limiting members 3 may be 2 to 5, and the number of cells 2 in each space separated by the position-limiting member 3 may be 3 to 9, preferably 4 to 8. With such a configuration, it is possible to prevent the actual maximum expansion force applied to the left side plate 13 and the right side plate 14 from exceeding their strength limits. At the same time, the number of the position-limiting members 3 can be reduced to realize the utilization and weight reduction of the internal space of the battery module as much as possible.

[0034] The frame 1 of the battery module of the present invention further includes a plurality of buffer members 4 respectively inserted between adjacent cells 2 and between the outermost cell 2 and the adjacent side plate. The buffer member 4 inserted between adjacent cells 2 may also be inserted only between two serially connected cells 2, and the cells 2 connected in parallel are adhered by double-sided tape or spray adhesive. Of course, in another embodiment, the buffer member 4 may be inserted only between adjacent cells 2, and the buffer member 4 may be used to absorb the amount of expansion of the cell 2.

[0035] Exemplarily, one or more buffer members 4 may be arranged between every two adjacent cells 2, and the position and number of the buffer members 4 can be designed according to actual needs as long as it can be ensured that when the cell 2 expands, the buffer members 4 can absorb the amount of expansion as much as possible and reduce the amount of displacement transmitted to other cells 2. Further explanation is not provided here.

[0036] Figure 3 shows the structure of the buffer member 4. As shown in Figure 3, the present invention provides a new type of buffer member 4 including an outer frame portion 41 and a buffer portion 42, and the hardness of the outer frame portion 41 is greater than that of the buffer portion 42. The outer frame portion 41 is made of a metal material having a certain hardness, and the buffer portion 42 is preferably made of a soft polyester elastic material. When the cell 2 expands, the amount of expansion at the center of the cell 2 is much larger than that at its periphery. Therefore, by providing a buffer member 4 having a certain rigidity at the periphery and high buffer performance at the center, when the expansion force in the central region of the cell 2 is completely absorbed by using the buffer portion 42, the outer frame portion 41 still maintains the original shape of the buffer member 4. Therefore, almost no deformation or displacement occurs to the buffer member 4, thereby effectively reducing the transmission of the displacement of the expanded cell 2 and improving the stability and reliability of the entire battery module.

[0037] FIG. 4 shows the assembly relationship of the position-limiting member 3, the bottom plate 11, and the upper cover 12. As shown in FIG. 4, the bottom plate 11 and the upper cover 12 are arranged to face each other. At least one of the bottom plate 11 and the upper cover 12 is provided with a positioning groove 111. By embedding and positioning the position-limiting member 3 in the positioning groove 111, the positioning assembly of the position-limiting member 3 is facilitated. In FIG. 4, the position-limiting member 3 is fixedly connected to the bottom plate 11 and the upper cover 12 by bolts. Naturally, in another embodiment, the position-limiting member 3 may be fixedly connected to the bottom plate 11 and the upper cover 12 by welding or riveting. In the embodiment shown in FIG. 4, there are two position-limiting members 3 arranged parallel to the frame 1 and two positioning grooves 111 arranged corresponding to the bottom plate 11. By fixing the position-limiting member 3 in the positioning groove 111, the frame 1 is divided into three separated spaces. Obviously, the numbers of the position-limiting member 3 and the positioning groove 111 provided here are merely examples. As described above, those skilled in the art can reasonably select the numbers of the positioning groove 111 and the position-limiting member 3 based on the number of cells 2 provided in the used battery module. Since the position-limiting member 3 is made of a material with high strength, high quality, and light weight, on the premise that it can withstand the expansion force of a cell group composed of several cells, the weight reduction of the entire battery module can be realized.

[0038] In one embodiment, the frame 1 of the battery module of the present invention further comprises an energy absorption member 5. As shown in FIGS. 4 and 6, the main body of the energy absorption member 5 is elongated, and its length is substantially the same as the length of the position limiting member 3. The energy absorption member 5 is arranged at a position adjacent to the position limiting member 3 and may be located adjacent to one or both sides of the position limiting member 3 to absorb the expansion force of the cell 2. FIGS. 4 and 5 show an arrangement in which the energy absorption members 5 are provided on the left and right sides of the position limiting member 3. As shown in FIGS. 4 and 5, one surface of the energy absorption member 5 arranged on two adjacent sides of the position limiting member 3 contacts one surface of the cell 2, and the other surface contacts the position limiting member 3. Similar to the purpose of providing the buffer member 4, the purpose of providing the energy absorption member 5 is to further absorb the displacement caused by the expansion of the cell 2. Therefore, the energy absorption member 5 may also adopt the same structure and material as the buffer member 4. However, in the embodiments shown in the drawings of the present invention, another solution is provided. Specifically, the entire energy absorption member 5 is made of a material having a certain rigidity, and a plurality of protruding energy absorption portions 51 are formed on its surface. Each energy absorption portion 51 of the energy absorption member 5 shown in FIG. 4 is a protruding rectangle, and the plurality of rectangular protruding energy absorption portions 51 are arranged at intervals along the length direction of the energy absorption member 5. The shape of each energy absorption portion 51 is not particularly limited, but it is preferably a regular shape of the same shape (meaning the same size and shape and completely overlapping) arranged at equal intervals. With such a structure, when adjacent cells 2 expand and cause a squeezing displacement to the energy absorption member 5, the energy absorption portions 51 protruding from the surface of the energy absorption member 5 first receive the thrust generated by such a displacement, and local displacement or local depression occurs. In this situation, the original thickness of the protruding structure is flattened to a certain extent, thereby absorbing a part of the thrust generated by the expansion and even reducing or eliminating the influence caused by the expansion force. The energy absorption member 5 is arranged at adjacent positions on both sides of the position limiting member 3. Such a symmetrical structure further improves the force uniformity and structural stability.At the same time, since the main body of the energy absorption member 5 is made of a rigid material, local deformation caused by the force applied to the energy absorption portion 51 is less likely to affect the installation shape of the main body, and to a certain extent, the strengthening effect on the position limiting member 3 can be realized, and the internal stability of the entire battery module can be further strengthened.

[0039] In the above-described embodiment, FIG. 6 further shows the specific structure of the energy absorption member 5 and the cooperation relationship between the energy absorption member 5 and the position limiting member 3. As shown in FIG. 6, the plurality of energy absorption portions 51 arranged on the energy absorption member 5 have the same shape and are arranged at intervals on the energy absorption member 5. Therefore, all the energy absorption portions 51 can be arranged flush with the surface in contact with the cell 2, and it is ensured that each energy absorption portion 51 and the cell 2 are uniformly in contact. Each energy absorption portion 51 shown in the drawing is formed in a protruding rectangular shape. However, those skilled in the art can set the energy absorption portion 51 to any shape as needed. In the embodiment of the present invention, the protruding directions of adjacent energy absorption portions 51 are opposite. That is, the protrusions are arranged alternately. With such a design, the energy absorption portions 51 can protrude upward on both sides of the energy absorption member 5, so that the force is uniformly applied to the component and a stable structure is ensured, thereby improving the energy absorption effect of the energy absorption member 5. Further, the arrangement relationship between the energy absorption member 5 and the position limiting member 3 shown in FIGS. 5 and 6 is such that the two energy absorption members 5 arranged on the left and right sides of the same position limiting member 3 are symmetric with respect to the axis of the position limiting member 3. More specifically, the two energy absorption members 5 on the left and right sides of the position limiting member 3 are axially symmetric with respect to the position limiting member 3. Such a symmetric structure further improves the uniformity of force and the structural stability. Exemplarily, the energy absorption member 5 may be an integrally formed metal plate, and the energy absorption portion 51 is formed on the metal plate by punching. In another embodiment, the energy absorption member 5 may be a rubber plate having a certain elasticity, and the energy absorption portion 51 may be formed by injection molding. The energy absorption portion 51 absorbs the expansion force of the cell 2 by elastic deformation.

[0040] In the above-described embodiment, the energy absorption member 5 and the position limiting member 3 in FIG. 4 are simply arranged adjacent to each other, and there is no connection structure therebetween. FIGS. 7 and 8 show an assembled configuration in which the energy absorption member 5 and the position limiting member 3 are connected by a connecting member. As shown in FIGS. 7 and 8, the battery module further includes a positioning member 6. The plurality of positioning members 6 are arranged along the length direction of the position limiting member 3 to fix and assemble the energy absorption member 5 to the position limiting member 3. Exemplarily, the energy absorption member 5 may be assembled to the position limiting member 3 by two rows of positioning members 6. By arranging the two rows of positioning members 6 side by side along the width direction of the position limiting member 3, it is ensured that the energy absorption member 5 can be stably assembled, preventing the energy absorption member 5 from moving away from its position within the frame 1 when compressed and affecting the energy absorption effect. As shown in the specific embodiment of FIG. 8, the positioning member 6 is set as a bolt, and the energy absorption member 5 is fastened to the position limiting member 3 by using the positioning member 6. Compared with the above-described technical solution without a connecting member, the lateral displacement of the energy absorption member 5 with respect to the position limiting member 3 can be avoided, and the reliability and stability of the module structure can be further improved.

[0041] In one embodiment, the frame 1 of the battery module of the present invention further includes a first energy absorption mechanism 7 therein. As shown in FIG. 9, the first energy absorption mechanism 7 includes a first support member 71, a second support member 72, and a first energy absorption assembly 73. The first support member 71 and the second support member 72 are arranged in parallel at intervals along the stacking direction of the cells and are connected to both sides of the first energy absorption assembly 73. The thickness of the first energy absorption assembly 73 in the stacking direction of the cells is adjustable. Since the function of the first energy absorption mechanism 7 is the same as that of the energy absorption member 5 in the above-described embodiment, it will not be repeatedly described here. Also, it should be noted that the same battery module may include both the first energy absorption mechanism 7 and the energy absorption member 5, or may include only the first energy absorption mechanism 7 or the energy absorption member 5, but the present invention is not limited thereto. Exemplarily, the first support member 71 abuts against the position limiting member 3, and the second support member 72 abuts against the cell 2. When the cell 2 expands, the expansion force of the cell 2 pushes the second support member 72 to move in the direction of the first support member 71 and squeeze the first energy absorption assembly 73. Therefore, the first energy absorption assembly 73 is pressed thinly to absorb the expansion force of the cell 2. When the expansion force of the cell 2 disappears, the first energy absorption assembly 73 returns to its original state, thereby pushing the second support member 72 to move away from the first support member 71. Of course, the first support member 71 may abut against the cell 2, and the second support member 72 may abut against the position limiting member 3. To improve the energy absorption capacity of the first energy absorption mechanism 7, a plurality of first energy absorption assemblies 73 are spaced between the first support member 71 and the second support member 72 along the length direction of the cell 2. The structural dimensions of the plurality of first energy absorption assemblies 73 are preferably the same. For example, 11 first energy absorption assemblies 73 are spaced between the first support member 71 and the second support member 72 along the length direction of the cell 2. Of course, the number of the first energy absorption assemblies 73 can be freely set between 3 and 15.

[0042] In the above-described embodiment, as shown in FIG. 10, the first energy absorption assembly 73 includes a first member 731, a second member 732, a reset member 733, a rotating shaft 734, and an adapter 735. The first member 731 and the second member 732 are pivotally connected via the rotating shaft 734. Specifically described, the middle portion of the first member 731 and the middle portion of the second member 732 are pivotally connected via the rotating shaft 734. Both ends of the reset member 733 are respectively connected to the first member 731 and the second member 732, and the two reset members 733 are respectively disposed on both sides of the rotating shaft 734. Both ends of the first member 731 are respectively connected to the first support member 71 and the second support member 72 via the adapter 735. Both ends of the second member 732 are respectively connected to the first support member 71 and the second support member 72 via the adapter 735. In FIG. 10, the adapter 735 includes a shaft support portion 7351 and a fixing portion 7352. The shaft support portion 7351 is pivotally connected to the first member 731 or the second member 732, and the fixing portion 7352 is fixedly connected to the first support member 71 or the second support member 72. Due to the design of the adapter 735, when the distance between the first support member 71 and the second support member 72 decreases or increases, in order to maintain the horizontal, the connection strength between the first support member 71 and the first member 731 and the second member 732 can be ensured, and the connection strength between the second support member 72 and the first member 731 and the second member 732 can also be ensured. When the cell 2 expands, the expansion force of the cell 2 pushes the second support member 72 to move in the direction of the first support member 71, squeezing the first energy absorption assembly 73. The reset member 733 in the first energy absorption assembly 73 is compressed, so the first energy absorption assembly 73 becomes thinner and absorbs the expansion force of the cell 2. When the expansion force of the cell 2 disappears, the first member 731 and the second member 732 in the first energy absorption assembly 73 rotate relative to each other under the action of the reset member 733 and can push the second support member 72 to move away from the first support member 71, so the first energy absorption mechanism 7 returns to its original state. Also, in the above-described embodiment, at least one reset member 733 is provided on both sides of the rotating shaft 734.For example, both sides of the rotating shaft 734 are provided with 2 to 5 reset members 733 (which may be freely set).

[0043] In one embodiment, the frame 1 of the battery module of the present invention further includes a second energy absorption mechanism 8 therein. Since the function of the second energy absorption mechanism 8 is the same as that of the energy absorption member 5 in the above-described embodiment, it will not be repeatedly described here. Also, it should be noted that the same battery module may simultaneously include the first energy absorption mechanism 7, the second energy absorption mechanism 8, and the energy absorption member 5, or may include only the first energy absorption mechanism 7 or the second energy absorption mechanism 8 or the energy absorption member 5, but the present invention is not limited thereto. As shown in FIGS. 11 and 12, the second energy absorption mechanism 8 includes a block push assembly 81 and a second energy absorption assembly 82 spaced apart along the stacking direction of the cells. Since the space between the block push assembly 81 and the second energy absorption assembly 82 is adjustable, the expansion force of the cell 2 can be absorbed. The block push assembly 81 abuts against the cell 2, the second energy absorption assembly 82 abuts against the position limiting member 3, and the block push assembly 81 can move toward the second energy absorption assembly 82 under the action of the expansion force of the cell 2.

[0044] In the above-described embodiment, as shown in FIG. 12, the block push assembly 81 includes a push plate 811, a push block 812, and an elastic member 813. The push block 812 is installed on the push plate 811 via the elastic member 813. The push block 812 can move elastically along the stacking direction of the cells 2 relative to the push plate 811 and can absorb the expansion force of the cells 2. As shown in FIG. 12, the second energy absorption assembly 82 includes an energy absorption housing 821, a first contact member 822, a first sliding member 823, a first energy absorption and reset member 824, a second contact member 825, a second sliding member 826, and a second energy absorption and reset member 827. The first contact member 822 and the first sliding member 823 are both slidably disposed within the energy absorption housing 821. The first energy absorption and reset member 824 is compressed within the energy absorption housing 821 and the first contact member 822. The first sliding member 823 abuts against one side of the push block 812. The second contact member 825 and the second sliding member 826 are both slidably disposed within the energy absorption housing 821. The second contact member 825 and the first contact member 822 are symmetrically arranged. The second sliding member 826 and the first sliding member 823 are symmetrically arranged. The second energy absorption and reset member 827 is connected between the energy absorption housing 821 and the second contact member 825, and the second sliding member 826 abuts against the other side of the push block 812. When the expansion force of the cell 2 acts on the push plate 811 and moves the push plate 811 toward the second energy absorption assembly 82, the push block 812 separates the first sliding member 823 and the second sliding member 826 from each other, so that the first contact member 822 and the second contact member 825 separate from each other, thereby compressing the first energy absorption and reset member 824 and the second energy absorption and reset member 827. In FIG. 12, the longitudinal cross-sectional shape of the push block 812 is an isosceles trapezoid, the first sliding member 823 and the second sliding member 826 are symmetrically arranged, and the first sliding member 823 and the second sliding member 826 respectively abut against two circumferential sides of the push block 812.When the push plate 811 drives the push block 812 to approach the second energy absorption assembly 82, the two circumferential sides of the push block 812 drive the first sliding member 823 and the second sliding member 826 to move away from each other, and then the first abutting member 822 and the second abutting member 825 can be pushed and moved away from each other. The first energy absorption and reset member 824 and the second energy absorption and reset member 827 are further compressed. In this process, the first energy absorption and reset member 824, the second energy absorption and reset member 827, and the elastic member 813 can all absorb the expansion force of the cell 2. When the expansion force of the cell 2 disappears, the elastic forces of the first energy absorption and reset member 824 and the second energy absorption and reset member 827 push the first abutting member 822 and the second abutting member 825 to move relative to each other, thereby squeezing the first sliding member 823 and the second sliding member 826 and enabling them to move relative to each other. Under the squeezing action of the first sliding member 823 and the second sliding member 826, the push block 812 is pushed to move away from the second energy absorption assembly 82. The overall thickness of the second energy absorption mechanism 8 increases until the second energy absorption mechanism 8 returns to its original state.

[0045] Figure 13 is a partially enlarged view of Figure 12, and Figure 13 shows the cooperation relationship between the first sliding member 823 and the second sliding member 826 and the push plate 811. As shown in Figure 13, the push plate 811 includes a first position limiting guide groove 8111 and a second position limiting guide groove 8112. The first position limiting guide groove 8111 and the second position limiting guide groove 8112 are respectively arranged on both sides of the push block 812. One end of the first sliding member 823 is slidably engaged with the first position limiting guide groove 8111, and one end of the second sliding member 826 is slidably engaged with the second position limiting guide groove 8112. Such a design can ensure that the first sliding member 823 and the second sliding member 826 move stably along a specific direction, so that the energy absorption effect of the second energy absorption mechanism 8 can have stability and reliability.

[0046] FIG. 14 shows a schematic structural view of the second energy absorption mechanism 8 without the energy absorption housing 821. For the second energy absorption assembly 82, one first contact member 822, one second contact member 825, two first sliding members 823, two second sliding members 826, seven first energy absorption and reset members 824, and seven second energy absorption and reset members 827 are provided in the energy absorption housing 821. The numbers of the first energy absorption and reset members 824 and the second energy absorption and reset members 827 are not limited to seven, and may be any number between 2 and 15. The numbers of the first sliding member 823 and the second sliding member 826 are not limited to two, and may be any number between 1 and 15. The first contact member 822 and the second contact member 825 are preferably one, which can ensure the stability and reliability of the output of the elastic force of the first energy absorption and reset member 824 and the second energy absorption and reset member 827. In FIG. 14, the first sliding member 823 and the second sliding member 826 are symmetrically arranged. The first sliding member 823 is provided with a recess that cooperates with the push block 812, ensuring a stable cooperation relationship between the first sliding member 823 and the push block 812. The second sliding member 826 is provided with a recess that cooperates with the push block 812, ensuring a stable cooperation relationship between the second sliding member 826 and the push block 812. The matching surface of the first sliding member 823 and the first contact member 822 is preferably an inclined surface. When the thickness of the first contact member 822 is constant, the area of the matching surface of the first sliding member 823 and the first contact member 822 increases, so that the stability of the force transmission between the two can be ensured. Similarly, the matching surface of the second sliding member 826 and the second contact member 825 is an inclined surface. When the thickness of the second contact member 825 is constant, the area of the matching surface of the second sliding member 826 and the second contact member 825 increases, so that the stability of the force transmission between the two can be ensured.

[0047] This embodiment further provides an electronic device (not shown) including the above-described battery module. By applying the battery module to the electronic device, the amount of expansion of the battery module is reduced, the performance of the battery module is stabilized, and the safety of the electronic device is improved.

[0048] Optionally, the electronic device may be an electric vehicle.

[0049] It should be noted that the above is only an explanation of the preferred embodiments of the present invention and the technical principles used. As can be understood by those skilled in the art, the present invention is not limited to the specific embodiments described above, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the above embodiments have described the present invention in detail, other equivalent embodiments can also be included without departing from the concept of the present invention. The scope of the present invention shall be determined based on the appended claims.

Industrial Applicability

[0050] The battery module and electronic device of the present invention can be used to absorb the expansion of the cells and improve the safety of the electronic device using the battery module.

Explanation of Reference Numerals

[0051] 1 Frame 2 Cell 3 Position Limiting Member 4 Buffer Member 5 Energy Absorbing Member 6 Positioning Member 7 First Energy Absorbing Mechanism 8 Second Energy Absorbing Mechanism 11 Bottom Plate 12 Upper Cover 13 Left Side Plate 14 Right Side Plate 15 Front End Plate 16 Rear End Plate 41 Outer Frame Portion 42 Buffer part 51 Energy absorption part 71 First support member 72 Second support member 73 First energy absorption assembly 81 Block push assembly 82 Second energy absorption assembly 111 Positioning groove 731 First member 732 Second member 733 Reset member 734 Rotating shaft 735 Adapter 811 Push plate 812 Push block 813 Elastic member 821 Energy absorption housing 822 First contact member 823 First sliding member 824 First energy absorption and reset member 825 Second contact member 826 Second sliding member 827 Second energy absorption and reset member 7351 Shaft support part 7352 Fixing part 8111 First position limiting guide groove 8112 Second position limiting guide groove

Claims

1. A frame, a plurality of cells stacked in parallel within the frame, at least one position-limiting member disposed within the frame, dividing the frame into a plurality of spaces and arranging the plurality of cells uniformly, a plurality of buffer members respectively disposed between adjacent cells and / or between the cells and the frame, an energy-absorbing member disposed at a position adjacent to the at least one position-limiting member, further absorbing the displacement caused by the expansion of the cells by absorbing the expansion force of the cells, comprising, wherein the energy-absorbing member includes a plurality of energy-absorbing portions, the plurality of energy-absorbing portions having the same shape and being spaced apart on the energy-absorbing member, each of the energy-absorbing portions includes a first support member, a second support member, and a first energy-absorbing assembly, the first support member and the second support member are spaced apart in parallel along the stacking direction of the cells, connected to both sides of the first energy-absorbing assembly, and the thickness of the first energy-absorbing assembly in the stacking direction of the cells is adjustable, the first energy-absorbing assembly includes a first member, a second member, a reset member, a rotating shaft, and an adapter, wherein the middle portions of the first member and the second member are pivotally connected via the rotating shaft, both ends of the reset member are respectively connected to the first member and the second member, and the two reset members are respectively disposed on both sides of the rotating shaft, both ends of the first member are respectively connected to the first support member and the second support member via the adapter, both ends of the second member are respectively connected to the first support member and the second support member via the adapter, a battery module.

2. A frame, a plurality of cells stacked in parallel within the frame, at least one position-limiting member disposed within the frame, dividing the frame into a plurality of spaces and arranging the plurality of cells uniformly, a plurality of buffer members respectively disposed between adjacent cells and / or between the cells and the frame, an energy-absorbing member disposed at a position adjacent to the at least one position-limiting member, further absorbing the displacement caused by the expansion of the cells by absorbing the expansion force of the cells, comprising, The energy absorption member includes a plurality of energy absorption portions, the plurality of energy absorption portions have the same shape, and are arranged on the energy absorption member at intervals. Each of the energy absorption portions includes a block push assembly and a second energy absorption assembly spaced along the stacking direction of the cells, and the space between the block push assembly and the second energy absorption assembly is adjustable. The block push assembly includes a push plate, a push block, and an elastic member. The push block is installed on the push plate via the elastic member, and the push block can move elastically along the stacking direction of cell 2 relative to the push plate. The second energy absorption assembly includes an energy absorption housing, a first abutting member, a first sliding member, a first energy absorption and reset member, a second abutting member, a second sliding member, and a second energy absorption and reset member. Both the first abutting member and the first sliding member are slidably arranged within the energy absorption housing. The first energy absorption and reset member is compressed within the energy absorption housing and the first abutting member. The first sliding member abuts against one side of the push block, and both the second abutting member and the second sliding member are slidably arranged within the energy absorption housing. The second energy absorption and reset member is connected between the energy absorption housing and the second abutting member, and the second sliding member abuts against another side of the push block. A battery module.

3. The battery module according to claim 1 or 2, further comprising a positioning member, wherein the positioning member fixes the energy absorption member to the at least one position limiting member.

4. Both sides of the at least one position limiting member are provided with the energy absorption member, and the two energy absorption members provided on both sides of the position limiting member are symmetric with respect to the at least one position limiting member. The battery module according to claim 1 or 2.

5. Both sides of the at least one position-limiting member are provided with the energy absorption members, and the two energy absorption members provided on both sides of the position-limiting member are symmetric with respect to the at least one position-limiting member. The battery module according to claim 1 or 2.

6. Both sides of the at least one position-limiting member are provided with the energy absorption members, and the two energy absorption members provided on both sides of the position-limiting member are symmetric with respect to the at least one position-limiting member. The battery module according to claim 3.

7. Each of the buffer members includes an outer frame portion and a buffer portion, and the hardness of the outer frame portion is greater than the hardness of the buffer portion. The battery module according to claim 1 or 2.

8. The frame includes a bottom plate and an upper cover, and at least one of the bottom plate and the upper cover is provided with a positioning groove for embedding and positioning at least a part of the at least one position-limiting member. The battery module according to claim 1 or 2.

9. Each of the plurality of spaces divided by the at least one position-limiting member has 3 to 9 of the cells respectively. The battery module according to claim 1 or 2.

10. An electronic device including the battery module according to any one of claims 1 to 9.

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