Battery cell assembly and battery

Abstract

The utility model discloses an electrical core assembly and a battery with the electrical core assembly, the electrical core assembly comprises a protective shell, an electrical core and a heat conduction buffer layer, the electrical core is arranged in the protective shell, and a gap is arranged between the surface of the electrical core and the protective shell; and the heat conduction buffer layer is arranged between the surface of the battery cell and the protective shell. According to the battery cell assembly disclosed by the embodiment of the utility model, the gap suitable for heat dissipation of the battery cell is formed in the battery cell assembly, and the heat conduction buffer layer is arranged between the battery cell and the protective shell, so that the expansion pressure during charging and discharging of the battery cell can be buffered, the battery cell is prevented from being overheated, and the battery cell is favorably protected.

Description

Technical Field

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

[0002] Soft packs are widely used in 3C digital products, mobile communications, energy storage, and new energy vehicles due to their high energy density, compact size, light weight, and flexible assembly. However, in related technologies, battery cells generate heat during operation and expand during charging and discharging, leading to overheating or damage. Utility Model Content

[0003] The present invention aims to at least partially address one of the technical problems in the related art. To this end, one objective of the present invention is to provide a battery cell assembly having a heat dissipation gap and a thermally conductive buffer layer, which can buffer the expansion pressure of the battery cell during charging and discharging, prevent the battery cell from overheating, and thus protect the battery cell.

[0004] Another object of the present invention is to provide a battery comprising the aforementioned battery cell assembly.

[0005] According to an embodiment of the present invention, the battery cell assembly includes: a protective shell, a battery cell and a thermally conductive buffer layer. The battery cell is arranged in the protective shell, and a gap is provided between the surface of the battery cell and the protective shell; the thermally conductive buffer layer is arranged between the surface of the battery cell and the protective shell.

[0006] According to the battery cell assembly of the embodiment of the present invention, by constructing a gap suitable for heat dissipation of the battery cell in the battery cell assembly and providing a thermally conductive buffer layer between the battery cell and the protective shell, the expansion pressure of the battery cell during charging and discharging can be buffered, overheating of the battery cell can be avoided, and the battery cell can be protected.

[0007] In addition, the battery cell assembly according to the above embodiment of the present invention may also have the following additional technical features:

[0008] In some examples of the present invention, the battery cell has a first surface and a second surface opposite to each other along the thickness direction, the protective shell includes a first shell and a second shell, the first shell and the second shell are arranged along the thickness direction, and the battery cell is arranged between the first shell and the second shell, wherein the thermal conductive buffer layer is arranged between the first surface and the first shell and / or between the second surface and the second shell.

[0009] In some examples of the present invention, the thermally conductive buffer layer is partially filled between the surface of the battery core and the protective shell.

[0010] In some examples of the present invention, the thermally conductive buffer layer is provided on the protective shell and abuts against the battery core; or the thermally conductive buffer layer is provided on the battery core and abuts against the protective shell.

[0011] In some examples of the present invention, the protective shell includes a first frame, a second frame, a first shell and a second shell. The first frame and the second frame clamp and position the battery cell along the thickness direction of the battery cell. The first shell is arranged on the outside of the first frame, and the second shell is arranged on the outside of the second frame.

[0012] In some examples of the present invention, the first frame is provided with a plurality of first protrusions arranged at intervals on opposite sides along the width direction of the battery cell, the second frame is provided with a plurality of second protrusions arranged at intervals on opposite sides along the width direction of the battery cell, the first protrusions and the second protrusions are connected to form a card protrusion, the first shell and the second shell are provided with a plurality of connecting parts on opposite sides along the width direction of the battery cell, the connecting parts are provided with card slots, and the card protrusions are suitable for cooperating with the card slots.

[0013] In some examples of the present invention, the multiple connecting members include: a plurality of first connecting members and a plurality of second connecting members arranged at intervals on opposite sides of the first shell along the width direction of the battery cell, and a plurality of third connecting members and a plurality of fourth connecting members arranged at intervals on opposite sides of the second shell along the width direction of the battery cell; wherein, a first gap is constructed between two adjacent first connecting members, and a second gap is constructed between two adjacent second connecting members; the third connecting member extends into the first gap, and the fourth connecting member extends into the second gap.

[0014] In some examples of the present invention, the battery cell is provided with a first pole tab and a second pole tab on opposite sides along the length direction, and the protective shell includes a first frame, a second frame and a pole tab protection member, the first frame and the second frame clamp and position the first pole tab and the second pole tab along the thickness direction of the battery cell, and the pole tab protection member clamps the first frame and the second frame along the length direction of the battery cell and is fixed by a fixing member.

[0015] In some examples of the present invention, one of the first frame and the second frame is provided with a positioning boss, and the other is provided with a positioning hole suitable for cooperating with the positioning boss, and the positioning boss and the through hole are located on opposite sides of the tab protector.

[0016] In some examples of the present invention, the first frame and the second frame are provided with recesses, and the tab protector is inserted into the recesses.

[0017] Batteries according to some embodiments of the present invention include the aforementioned battery cell assembly.

[0018] According to some embodiments of the present invention, by applying the aforementioned battery cell assembly in the battery, the thermal conductivity of the battery can be improved, and the battery cell can buffer the expansion pressure, thereby improving the safety of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a battery cell assembly in some embodiments of the present invention (showing the structure of the battery cell assembly after assembly);

[0020] Figure 2 is a schematic structural diagram of a battery cell assembly in some embodiments of the present invention (showing the structure of the battery cell assembly after assembly);

[0021] Figure 3 Schematic diagram of the assembly structure of the battery cell assembly in some embodiments of the present invention (showing the structure of the battery cell assembly when not assembled);

[0022] Figure 4 is a schematic structural diagram of the first shell in some embodiments of the present invention (showing a state where the heat conductive buffer layer is provided on the first shell);

[0023] Figure 5 This is a schematic structural diagram of the first frame in some embodiments of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the battery cell in some embodiments of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the tab protection member and the fixing member in some embodiments of the present invention.

[0026] Reference numerals:

[0027] 1000, battery cell assembly; 100, protective case; 11, first housing; 12, second housing; 110, slot; 111, first connector; 112, second connector; 123, third connector; 124, fourth connector; 101, first notch; 102, second notch; 131, first frame; 132, second frame; 13a, first frame body; 13b, second frame body; 13c, third frame body; 13d, fourth frame body; 104, first assembly area; 105. Second assembly area; 1331. First protrusion; 1332. Second protrusion; 133. Clamping protrusion; 134. Positioning boss; 103. Positioning hole; 130. Recess; 16. Tab protector; 161. First protective sheet; 162. Second protective sheet; 163. Third protective sheet; 17. Fixing member; 171. Screw; 172. Nut; 200. Battery cell; 21. First tab; 22. Second tab; 300. Thermally conductive buffer layer; 31. Thermally conductive aerogel pad. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] Combine Figure 1 and Figure 3 According to an embodiment of the present invention, the battery cell assembly 1000 includes: a protective shell 100 and a battery cell 200. The battery cell 200 is arranged in the protective shell 100. The protective shell 100 can protect the battery cell 200. A gap is provided between the surface of the battery cell 200 and the protective shell 100. The gap can provide heat dissipation space for the battery cell 200, which can prevent the battery from overheating and help improve the stability of the operation of the battery cell assembly 1000. Furthermore, the battery cell assembly 1000 also includes a thermally conductive buffer layer. The thermally conductive buffer layer is provided between the surface of the battery cell 200 and the protective shell 100. The thermally conductive buffer layer can buffer the expansion pressure of the battery cell 200 during the charging and discharging process, thereby protecting the battery cell 200 and improving the safety of use. Specifically, when the battery cell 200 expands, the surface of the battery cell 200 may deform. The thermally conductive buffer layer can contact the surface of the battery cell 200 or fit in the gap with the battery cell 200 to relieve the pressure caused by the expansion of the battery cell 200 and prevent the battery cell 200 from being damaged by excessive pressure. In addition, the heat-conducting buffer layer can be made of a heat-conducting material, so that the heat-conducting buffer layer can also play a heat-conducting effect.

[0030] According to the battery cell assembly 1000 of the embodiment of the present invention, by constructing a gap suitable for heat dissipation of the battery cell 200 in the battery cell assembly 1000 and providing a heat-conductive buffer layer between the battery cell 200 and the protective shell 100, the expansion pressure of the battery cell 200 during charging and discharging can be buffered, thereby avoiding overheating of the battery cell 200 and protecting the battery cell 200.

[0031] Furthermore, in some embodiments of the present invention, the battery cell 200 has a first surface and a second surface that are opposite each other along the thickness direction. The protective case 100 includes a first shell 11 and a second shell 12. The first shell 11 and the second shell 12 are arranged along the thickness direction, and the battery cell 200 is disposed between the first shell 11 and the second shell 12. Specifically, the thermally conductive buffer layer can be disposed only between the first surface and the first shell 11, or only between the second surface and the second shell 12. Alternatively, the thermally conductive buffer layer can be disposed between the first surface and the first shell 11 and between the second surface and the second shell 12. This can provide heat conduction and buffering effects on opposite sides of the battery cell 200.

[0032] More specifically, the protective shell 100 can be provided in a split type, which can be convenient for assembly. In this way, the thermally conductive buffer layer can be connected to the first shell 11 or the second shell 12, or the thermally conductive buffer layer can be connected to the first surface and the second surface of the battery cell 200. After the first shell 11 or the second shell 12 is matched with the first surface or the second surface of the battery cell 200, the thermally conductive buffer layer can be provided between the surface of the battery cell 200 and the shell, which is convenient for manufacturing and assembly.

[0033] It should be noted that the thickness direction can refer to Figure 2 The up and down directions and width directions can be referred to Figure 1 The left and right directions and the length direction can be referred to Figure 1 The front-to-back direction.

[0034] In some embodiments of the present invention, a heat-conducting buffer layer is partially filled between the surface of the battery cell 200 and the protective shell 100 .

[0035] In some embodiments of the present invention, the thermally conductive buffer layer is provided on the protective shell 100 and abuts the battery cell 200. Alternatively, the thermally conductive buffer layer is provided on the battery cell 200 and abuts the protective shell 100. In other words, the thermally conductive buffer layer can be interference-fitted with the surface of the battery cell 200 and the inner wall of the protective shell 100, thereby improving the contact tightness between the thermally conductive buffer layer and the surface of the battery cell 200. When the battery cell 200 expands, the expansion pressure can be promptly relieved, thereby improving the buffering effect.

[0036] Specifically, combined Figure 3 The thermally conductive buffer layer can include multiple thermally conductive aerogel pads 31, which can be attached to the surface of the battery cell 200 or the inner wall of the shell. The multiple thermally conductive aerogel pads 31 can be spaced apart in the gap between the protective shell 100 and the surface of the battery cell 200. In this way, the gap can not only buffer the expansion pressure of the battery cell 200, but also improve the heat dissipation effect and contribute to the lightweighting of the battery cell assembly 1000. Compared with the scheme of completely filling the gap with the thermally conductive buffer layer, the spaced arrangement of multiple thermally conductive aerogel pads 31 can also appropriately reduce manufacturing costs. The thermally conductive aerogel pads 31 can be in a long strip, circular, or other shape.

[0037] Optionally, the heat conductive buffer layer may also be made of materials such as plastic buffer glue.

[0038] Soft-packs are widely used in 3C digital products, mobile communications, energy storage, and new energy vehicles due to their high energy density, compact size, light weight, and flexible assembly. However, automotive module applications present challenges such as complex structure, numerous assembly components, and low overall space utilization. Limited by the soft-pack's inherent structure, the aluminum-plastic film is not as strong as a steel shell, and the battery cell's deformation deteriorates during later cycles, posing safety risks.

[0039] To this end, the present application proposes a protective shell 100 that is convenient for protecting the aluminum-plastic film from rupture, better assembling and disassembling the battery cell assembly 1000, and at the same time alleviating the pressure caused by the heat generation and expansion of the battery cell 200. Specifically, combined with Figure 3 In some embodiments of the present invention, the protective case 100 includes a first frame 131, a second frame 132, a first shell 11, and a second shell 12. The first frame 131 and the second frame 132 clamp and position the battery cell 200 along its thickness direction, thereby positioning and supporting the battery cell 200 and improving the overall structural stability of the battery cell assembly 1000. Specifically, the first shell 11 is disposed on the outside of the first frame 131, that is, on the side facing away from the second frame 132, and the second shell 12 is disposed on the outside of the second frame 132, that is, on the side facing away from the first frame 131. As a result, the first shell 11 and the second shell 12 can wrap around at least a portion of the first frame 131 and the second frame 132, improving the compactness of the structure and facilitating enhanced protection. The first frame 131 and the second frame 132 can clamp the battery cell 200 along the thickness direction of the battery cell 200. The first frame 131 and the second frame 132 can be arranged around the outer periphery of the battery cell 200. The first shell 11 and the second shell 12 can be covered on the surface of the battery cell 200. Thus, the protective shell 100 can protect the battery cell 200 from multiple directions.

[0040] Specifically, the first shell 11 and the second shell 12 can be an aluminum-plastic protective shell 100, and the first frame 131 and the second frame 132 are connected to the battery cell 200, the first shell 11 and the second shell 12, and can provide support for the battery cell 200 and the aluminum-plastic protective shell 100. Therefore, through the cooperation between the shell and the frame, the structural strength of the battery cell assembly 1000 can be improved.

[0041] Combine Figure 2 and Figure 3In some embodiments of the present invention, the first frame 131 is provided with a plurality of first protrusions 1331 spaced apart on opposite sides along the width of the battery cell 200, and the second frame 132 is provided with a plurality of second protrusions 1332 spaced apart on opposite sides along the width of the battery cell 200. When the first and second frames 131, 132 clamp the battery cell 200, the first and second protrusions 1331, 1332 connect to form latching protrusions 133. The latching protrusions 133 can be used to securely connect with the first and second shells 11, 12 to facilitate assembly of the battery cell assembly 1000. Specifically, the first and second shells 11, 12 are provided with a plurality of connectors on opposite sides along the width of the battery cell 200, each connector having a latching slot 110. The latching protrusions 133 are adapted to engage with the latching slots 110, thereby connecting the first and second shells 11, 12 to the first and second frames 131, 132. Optionally, the connecting piece may be provided with a locking protrusion 133 and a locking hole may be provided on the side of the frame. During assembly, the locking protrusion 133 may be inserted into the locking hole.

[0042] Specifically, the first frame 131 and the second frame 132 can support and fix the battery cell 200 along the thickness direction, and the opposite sides of the first shell 11 and the second shell 12 can be fixedly connected to the opposite sides of the first frame 131 and the second frame 132 respectively to connect the first shell 11 and the second shell 12 to the outside of the battery cell 200.

[0043] More specifically, combined with Figure 3 and Figure 4 In some embodiments of the present invention, the multiple connectors include: a plurality of first connectors 111 and a plurality of second connectors 112 arranged at intervals on opposite sides of the first shell 11 along the width direction of the battery cell 200, and a plurality of third connectors 123 and a plurality of fourth connectors 124 arranged at intervals on opposite sides of the second shell 12 along the width direction of the battery cell 200; wherein, a first notch 101 is constructed between two adjacent first connectors 111, and a second notch 102 is constructed between two adjacent second connectors 112; the third connector 123 extends into the first notch 101, and the fourth connector 124 extends into the second notch 102. That is, the first connector 111 and the second connector 112 on opposite sides of the first shell 11 in the width direction are not opposite or staggered in the width direction, the first connector 111 is opposite to the second notch 102, and the second connector 112 is opposite to the first notch 101. Therefore, when the first shell 11 and the second shell 12 are assembled along the thickness direction of the battery cell 200, the third connector 123 can be accommodated in the first notch 101, and the fourth connector 124 can be accommodated in the second notch 102. After assembly, the battery cell 200 is assembled. Figure 1 and Figure 2The first connecting piece 111 of the first shell 11 and the third connecting piece 123 of the second shell 12 can be connected along the length direction of the battery cell 200, and the second connecting piece 112 of the first shell 11 and the fourth connecting piece 124 of the second shell 12 can be connected along the length direction of the battery cell 200, so that the connecting pieces of the first shell 11 and the second shell 12 can wrap the battery cell 200 along the thickness direction of the battery cell 200. In addition, the card slot 110 on the connecting piece can also be fixedly connected to the first frame 131 and the second frame 132 in this direction, so that the frame and the shell can better protect the battery cell 200, and the assembly structure is simple.

[0044] Generally, the battery cell 200 extends a long distance along its length. Therefore, multiple connectors can be arranged along the length of the battery cell 200, with the multiple connectors spaced apart along the length of the battery cell 200. Each of the multiple connectors is provided with a latching slot 110 to improve the stability of the connection between the housing and the frame. Optionally, the frame and the housing can also be connected by a fastener 17 or other means. For example, the frame has a first latching hole, the connector has a second latching hole, and the fastener passes through the first and second latching holes to connect.

[0045] More specifically, the first connector 111, the second connector 112, the third connector 123, and the fourth connector 124 can have the same size. The multiple connectors have one end connected to the housing and the other end extending along the thickness of the battery cell 200. This not only protects the battery cell 200 from the side, but also allows the connectors to overlap with the side edges of the frame to improve structural stability after connection.

[0046] Combine Figure 3 and Figure 6In some embodiments of the present invention, a first tab 21 and a second tab 22 are provided on opposite sides of the battery cell 200 along the length direction. The protective case 100 includes a first frame 131, a second frame 132, and a tab protector 16. The first frame 131 and the second frame 132 clamp and position the first tab 21 and the second tab 22 along the thickness direction of the battery cell 200. The tab protector 16 clamps the first frame 131 and the second frame 132 along the length direction of the battery cell 200 and is fixed by a fixing member 17. In other words, the first frame 131 and the second frame 132 can wrap the first tab 21 and the second tab 22, thereby protecting the tabs. The tab protector 16 can be connected to the first frame 131 and the second frame 132 at corresponding positions of the first tab 21 and the second tab 22, thereby further improving the protection of the tabs. The tab protector 16 is fixedly connected to the first frame 131 and the second frame 132, which can also improve structural stability. Specifically, the tab protector 16 is clamped or sleeved on the first tab 21 and the second tab 22 to prevent short circuits, thereby improving the safety of the battery cell assembly 1000 and providing a simple structure for easy assembly. The tab protector 16 can also be directionally expanded to increase the flow conduction area, thereby improving the performance of the battery cell 200.

[0047] Specifically, combined Figure 3 The tab protector 16 is constructed into a U-shaped structure with an opening on one side. The tab protector 16 is suitable for being plugged into the first frame 131 and the second frame 132 from the open side. During assembly, the first frame 131 and the second frame 132 are first assembled along the thickness direction of the battery cell 200 to clamp the first tab 21 and the second tab 22. The opening of the tab protector 16 faces the tabs and is inserted into the outer sides of the first frame 131 and the second frame 132 where the tabs are located along the length direction. The fixing member 17 includes a screw 171 and a nut 172. The screw 171 and the nut 172 pass through the tab protector 16, the first frame 131, the second frame 132, the first tab 21 and the second tab 22 along the thickness direction to achieve the connection between the frame, the tabs and the tab protector 16. In this way, the structural stability of the battery cell assembly 1000 can be improved while protecting the tabs.

[0048] Furthermore, in order to improve the assembly structure stability of the first frame 131 and the second frame 132, in some embodiments of the present invention, Figure 5One of the first frame 131 and the second frame 132 is provided with a positioning boss 134, and the other is provided with a through hole suitable for cooperating with the positioning boss 134. The positioning boss 134 and the positioning hole 103 are located on opposite sides of the tab protector 16. The space on the opposite sides of the tab protector 16 can be used to connect the first frame 131 and the second frame 132, which is conducive to improving the compactness of the structure. Specifically, the tab extends along the width direction of the battery cell 200. On the opposite sides of the tab along the width direction, one side of the first frame 131 is provided with a positioning hole 103, and the other side is provided with a positioning boss 134 extending in the thickness direction. One side of the second frame 132 is provided with a positioning boss 134 extending in the thickness direction, and the other side is provided with a positioning hole 103. The positioning boss 134 extends into the positioning hole 103. The frame can have a certain thickness so that after the first frame and the second frame are connected, the positioning boss 134 will not protrude from the surface of the frame. For example, the protruding height of the positioning boss 134 can be roughly the same as the thickness of the position where the frame positioning hole 103 is located. This can not only improve the structural strength after assembly, improve the connection stability between the first frame 131 and the second frame 132, but also improve the overall aesthetics of the battery cell assembly 1000.

[0049] Specifically, the first frame 131 and the second frame 132 are four-corner frames, and the positioning bosses 134 or the positioning holes 103 can be set at the four corners of the frame to improve the overall structural stability after connection.

[0050] Combine Figure 1 and Figure 3 In some embodiments of the present invention, the first frame 131 and the second frame 132 are provided with recesses 130, and the tab protector 16 is inserted into the recesses 130. This facilitates positioning of the tab protector 16, allowing for quick and accurate determination of the assembly position of the tab protector 16 during assembly. Furthermore, the tab protector 16 is assembled into the recesses 130 of the frame. After assembly, the tab protector 16 can be roughly flush with the entire frame, which helps improve the structural stability and consistency after assembly. This makes the overall structure of the battery cell assembly 1000 more regular, facilitates assembly in the battery, and improves the battery's space utilization.

[0051] Combine Figure 5According to a battery cell assembly 1000 of a specific embodiment of the present invention, the first frame 131 and the second frame 132 each include a first frame body 13a, a second frame body 13b, a third frame body 13c and a fourth frame body 13d connected in sequence, wherein the first frame body 13a and the third frame body 13c are opposite to each other along the length direction of the battery cell 200, or in combination with the front-to-back direction in the figure, and the second frame body 13b and the fourth frame body 13d are opposite to each other along the width direction of the battery cell 200, or in combination with the left-right direction in the figure, and the first frame body 13a and the second frame body 13b have a first assembly area 104 and a second assembly area 105, and the positioning boss 134 and the through hole are located in the first assembly area 104, and the tab protector 16 is sleeved on the second assembly area 105, wherein the dimension of the first assembly area 104 along the thickness direction or in combination with the up-down direction in the figure is greater than the dimension of the second assembly area 105 along the thickness direction, and after the tab protector 16 is assembled, the tab protector 16 is roughly flush with the first assembly area 104.

[0052] According to some embodiments of the present invention, the battery includes the aforementioned battery cell assembly 1000. By applying the aforementioned battery cell assembly 1000 in the battery, the thermal conductivity of the battery can be improved, and the expansion pressure of the battery cell 200 can be buffered, thereby improving the safety of battery use.

[0053] A battery cell assembly 1000 according to a specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0054] Combine Figures 1 to 7 The present invention discloses a battery cell assembly 1000, comprising: a battery cell 200 and a protective shell 100, the protective shell 100 comprising a frame, a shell and a tab protector 16, the shell may be an aluminum-plastic composite protective shell 100, and a plurality of groups of thermally conductive aerogels are arranged inside the shell, wherein the tab protector 16 is fixed to the frame and the battery cell 200 by a fixing member 17, the fixing member 17 comprising four groups of bolts and nuts 172, which play a role of fixing and guiding flow, the battery cell assembly 1000 of the present invention is easy to install and disassemble as a whole, further improving the energy density of the battery cell 200, while buffering the deformation caused by the expansion of the battery cell 200 during the charging and discharging process.

[0055] Specifically, there are two sets of circular through holes at the tabs of the battery cell 200. The outside of the battery cell 200 has a corresponding aluminum-plastic composite shell, and the inside of the aluminum-plastic shell has a varying number of thermally conductive aerogel pads 31. During use, the first frame 131 and the second frame 132 are made of plastic material, and the internal dimensions of the overall frame match the dimensions of the battery cell 200. First, the battery cell 200 is placed as a whole between the first frame 131 and the second frame 132. The tabs of the battery cell 200 are provided with through holes, and the corresponding positions of the frames are also provided with through holes. The first frame and the second frame clamp the battery cell 200 along the thickness direction of the battery cell 200, and then the tab protection member 16 is installed in the recess 130 formed after the first frame 131 and the second frame 132 are assembled. The tab protector 16 includes a first protective sheet 161, a second protective sheet 162 and a third protective sheet 163. The first protective sheet 161 and the third protective sheet 163 are opposite to each other along the thickness direction of the battery cell 200. The second protective sheet 162 is connected to the same side of the first protective sheet 161 and the third protective sheet 163. The first protective sheet 161 and the second protective sheet 162 are both provided with through holes, which are opposite to the through holes of the battery cell 200 and the frame. During assembly, the first protective sheet 161 is stacked on the outside of the first frame 131, and the third protective sheet 163 is stacked on the outside of the second frame 132. The second protective sheet 162 is opposite to the first frame 131 and the second frame 132 along the length direction. The fixing member 17 passes through the through holes of the tab protector 16, the frame and the battery cell 200 along the thickness direction of the battery cell 200 to achieve a fixed connection between the three.

[0056] Finally, the first and second shells 11 and 12 are placed on the fixed frame along the thickness of the battery cell 200. The slots 110 on the shells align with the snaps on the frame. The thickness of the thermally conductive aerogel pad 31 matches the thickness of the battery cell 200 and the thickness of the sides of the two sets of support brackets. This provides space for heat dissipation of the battery cell 200 and also buffers the pressure caused by the expansion of the battery cell 200 during charging and discharging.

[0057] The battery cell assembly 1000 of the present invention simplifies assembly and disassembly by creating a modular design of the protective shell 100, battery cell 200, and buffer layer. Furthermore, the protective shell 100 includes a frame that supports the battery cell 200 and a shell that protects the surface of the battery cell 200, thereby enhancing the protection of the battery cell 200. Furthermore, the thermally conductive aerogel provides heat dissipation space for the battery cell 200, while also buffering the pressure caused by the expansion of the battery cell 200 during charging and discharging.

[0058] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "inside", "outside", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0059] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0061] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery cell assembly, characterized in that: include: protective case; A battery cell, wherein the battery cell is disposed in the protective shell, and a gap is provided between the surface of the battery cell and the protective shell; A heat-conducting buffer layer is provided between the surface of the battery core and the protective shell.

2. The battery core assembly according to claim 1, characterized in that The battery cell has a first surface and a second surface opposite to each other in a thickness direction, the protective shell includes a first shell and a second shell, the first shell and the second shell are arranged in the thickness direction, and the battery cell is arranged between the first shell and the second shell. Wherein, the heat conductive buffer layer is provided between the first surface and the first shell and / or between the second surface and the second shell.

3. The battery core assembly according to claim 1, characterized in that The heat conductive buffer layer is partially filled between the surface of the battery core and the protective shell.

4. The battery core assembly according to claim 3, characterized in that: The thermally conductive buffer layer is provided on the protective shell and abuts against the battery core; or the thermally conductive buffer layer is provided on the battery core and abuts against the protective shell.

5. The battery core assembly according to claim 1, characterized in that: The protective shell includes a first frame, a second frame, a first shell and a second shell. The first frame and the second frame clamp and position the battery cell along the thickness direction of the battery cell. The first shell is arranged outside the first frame, and the second shell is arranged outside the second frame.

6. The battery core assembly according to claim 5, characterized in that: The first frame is provided with a plurality of first protrusions arranged at intervals on opposite sides along the width direction of the battery cell, and the second frame is provided with a plurality of second protrusions arranged at intervals on opposite sides along the width direction of the battery cell. The first protrusions and the second protrusions are connected to form a card protrusion, and the first shell and the second shell are provided with a plurality of connecting parts on opposite sides along the width direction of the battery cell, and the connecting parts are provided with card slots, and the card protrusions are suitable for cooperating with the card slots.

7. The battery cell assembly according to claim 6, characterized in that: The multiple connecting members include: multiple first connecting members and multiple second connecting members arranged at intervals on opposite sides of the first shell along the width direction of the battery cell, and multiple third connecting members and multiple fourth connecting members arranged at intervals on opposite sides of the second shell along the width direction of the battery cell; wherein, a first gap is constructed between two adjacent first connecting members, and a second gap is constructed between two adjacent second connecting members; the third connecting member extends into the first gap, and the fourth connecting member extends into the second gap.

8. The battery core assembly according to claim 1, characterized in that: The battery cell is provided with a first pole tab and a second pole tab on opposite sides along the length direction. The protective shell includes a first frame, a second frame and a pole tab protector. The first frame and the second frame clamp and position the first pole tab and the second pole tab along the thickness direction of the battery cell. The pole tab protector clamps the first frame and the second frame along the length direction of the battery cell and is fixed by a fixing member.

9. The battery cell assembly according to claim 8, characterized in that: One of the first frame and the second frame is provided with a positioning boss, and the other is provided with a positioning hole suitable for cooperating with the positioning boss, and the positioning boss and the positioning hole are located on opposite sides of the tab protector; and / or The first frame and the second frame are provided with recesses, and the tab protector is plugged into the recesses.

10. A battery, characterized in that: Comprising the battery cell assembly according to any one of claims 1-9.

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