Battery cell fixing device and battery system

Abstract

The invention discloses a battery cell fixing device and a battery system. The battery cell fixing device comprises a heat conduction piece, a corrugated plate and a supporting piece, one side surface of the heat-conducting piece is used for fixing the battery cell; the corrugated plate is connected with the other side face of the heat conduction piece. The corrugated plate is of an elastic structure. The supporting piece is connected with the side face, away from the heat conduction piece, of the corrugated plate, the supporting piece and the heat conduction piece define a containing cavity, and the corrugated plate is arranged in the containing cavity. When the battery cell expands, acting force close to the supporting piece is applied to the heat conduction piece. The corrugated plate can generate elastic deformation, and the heat conduction piece can move towards the direction close to the supporting piece, so that a buffer space can be provided for the expansion of the battery cell, the interface separation between the supporting piece and the battery cell is effectively prevented, and the risks of displacement and damage of a circuit in the battery and short circuit of the battery cell are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery equipment, and in particular to a battery cell fixing device and a battery system. Background Art

[0002] During the battery's charge and discharge process, complex chemical reactions occur within the cell. As the number of charge and discharge cycles increases, the structure of the electrode material gradually changes, and the volume expansion phenomenon becomes more obvious.

[0003] When a battery cell expands, it directly exerts pressure on the adjacent supports. In a flat stacked structure, the space between the battery cell and the supports is limited, and this pressure is quickly transferred to the supports. Under the strong pressure generated by the battery cell expansion, the interface between the supports and the battery cell separates, causing the internal wiring of the battery to shift and break, increasing the risk of short circuits in the battery cell. Summary of the Invention

[0004] The main purpose of the present invention is to provide a battery cell fixing device and a battery system, which aims to solve the technical problem that under the strong pressure generated by the expansion of the battery cell, the interface between the support and the battery cell separates, thereby causing the internal circuits of the battery to shift and be damaged, increasing the risk of battery cell short circuit.

[0005] In order to achieve the above-mentioned object of the invention, the first aspect of the present invention provides a battery cell fixing device, comprising: A heat conducting member, one side of which is used for fixing the battery core; a corrugated plate connected to the other side of the heat conducting member, the corrugated plate being an elastic structure; and A support member is connected to the side of the corrugated plate facing away from the heat conducting member. The support member and the heat conducting member enclose a receiving cavity, and the corrugated plate is arranged in the receiving cavity.

[0006] In one embodiment, the battery cell fixing device includes a buffer member, and the buffer member is arranged between the heat conducting member and the corrugated plate.

[0007] In one embodiment, a plurality of avoidance holes are provided on the buffer component, and the corrugated plate can be welded to the heat conducting component through the avoidance holes.

[0008] In one embodiment, the accommodating cavity is filled with aerogel particle heat-insulating and fire-proof material.

[0009] In one embodiment, a plurality of the corrugated plates are provided, and the plurality of corrugated plates are arranged at intervals between the heat conducting member and the supporting member.

[0010] In one embodiment, the corrugated plate includes an insulating sleeve and a memory alloy plate, the memory alloy plate is corrugated, and the insulating sleeve is arranged outside the memory alloy plate.

[0011] In one embodiment, a through hole is provided on the memory alloy plate, and a protrusion is provided on the insulating sleeve, and the protrusion is passed through the through hole.

[0012] In one embodiment, along the length direction of the support member, the support member has a first outer side and a second outer side, the first outer side of the support member is provided with a first limiting member, and the second outer side of the support member is provided with a second limiting member, the first limiting member and the second limiting member are arranged opposite to each other, the heat conducting member is arranged between the first limiting member and the second limiting member, and the first limiting member and the second limiting member jointly limit the movement of the heat conducting member along the length direction of the support member; and / or Along the width direction of the support member, the support member has a third outer side and a fourth outer side, the third outer side of the support member is provided with a third limit member, and the fourth outer side of the support member is provided with a fourth limit member, the third limit member and the fourth limit member are arranged opposite to each other, and the heat conductor is arranged between the third limit member and the fourth limit member, and the third limit member and the fourth limit member jointly limit the movement of the heat conductor along the width direction of the support member.

[0013] In one embodiment, the heat conducting member includes a first plate, a second plate, and a third plate, wherein the second plate and the third plate are respectively connected to both ends of the first plate in a width direction, a side surface of the first plate is used to fix the battery cell, the second plate is arranged opposite to the third plate, and the first plate, the second plate, and the third plate form a frame structure with an accommodating space; The second plate is provided with a plurality of exhaust holes spaced equidistantly.

[0014] In one embodiment, the battery cell fixing device includes a sensor, which is arranged on the side of the heat conductive member facing the battery cell. The sensor is used to be connected to the battery cell, and the sensor can collect data of the battery cell.

[0015] A second aspect of the present invention provides a battery system, comprising a plurality of battery cells and a plurality of the aforementioned battery cell fixing devices, wherein the plurality of battery cell fixing devices correspondingly fix the plurality of battery cells, and two adjacent battery cell fixing devices are connected.

[0016] In one embodiment, along the length direction of the support member of the battery cell fixing device, a snap portion is provided at one end of the support member, and a snap groove adapted to the snap portion is provided at the other end of the support member, and the snap portion of one of the support members can be snapped into the snap groove of the other support member.

[0017] In one embodiment, the support member is provided with a rack and a tooth buckle, a hook is provided in the tooth buckle, the rack is provided along the height direction of the support member, and a plurality of teeth are provided on the rack; Along the height direction of the supporting members, the rack of one of the supporting members can be inserted into the tooth buckle of the other supporting member, and the teeth are engaged and connected with the buckle hook.

[0018] Beneficial effects: The battery cell fixing device of the present invention includes a heat conductor, a corrugated plate and a support member. One side of the heat conductor is used to fix the battery cell. The corrugated plate is connected to the other side of the heat conductor. The corrugated plate is an elastic structure. The support member is connected to the side of the corrugated plate facing away from the heat conductor, and the support member and the heat conductor form a receiving cavity, and the corrugated plate is arranged in the receiving cavity. When the battery cell expands, a force is applied to the heat conductor to approach the support member. At this time, the corrugated plate can undergo elastic deformation, and the heat conductor can move in the direction close to the support member, which can provide a buffer space for the expansion of the battery cell and avoid the battery cell directly squeezing the adjacent support member, thereby effectively preventing the interface between the support member and the battery cell from being separated, and reducing the risk of displacement, damage and battery cell short circuit of the internal circuit of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a battery cell and a battery cell fixing device according to an embodiment of the present invention.

[0020] Figure 2 1 is a schematic structural diagram of a battery cell fixing device according to an embodiment of the present invention.

[0021] Figure 3 1 is an exploded view of a battery cell fixing device according to an embodiment of the present invention.

[0022] Figure 4 1 is a diagram showing the internal structure of a battery cell fixing device according to an embodiment of the present invention.

[0023] Figure 5 2 is a schematic structural diagram of a heat conducting member according to an embodiment of the present invention.

[0024] Figure 6 It is a schematic structural diagram of a corrugated plate according to an embodiment of the present invention.

[0025] Figure 7 It is a schematic structural diagram of a memory alloy plate according to an embodiment of the present invention.

[0026] Figure 8 It is a structural schematic diagram of an insulating sleeve according to an embodiment of the present invention.

[0027] Figure 9 2 is a schematic structural diagram of a support member according to an embodiment of the present invention.

[0028] Figure 10 FIG. 1 is a structural diagram of a battery system according to an embodiment of the present invention.

[0029] Figure 11 yes Figure 10 Enlarged view of point A in the middle.

[0030] Figure 12 2 is a schematic structural diagram of a clasp according to an embodiment of the present invention.

[0031] Figure 13 yes Figure 8 Enlarged view of point B in the middle.

[0032] in: 10. Battery cell fixing device; 100, heat conducting member; 110, first plate; 120, second plate; 121, exhaust hole; 130, third plate; 200, corrugated plate; 210, insulating sleeve; 211, raised portion; 220, memory alloy plate; 221, through hole; 300, support member; 310, first limiting member; 320, second limiting member; 330, third limiting member; 340, fourth limiting member; 350, reserved hole; 360, buckle portion; 370, buckle groove; 380, rack; 381, teeth; 390, buckle; 391, hook; 400, battery cells; 500, aerogel particle thermal insulation and fireproof materials; 600. Buffer; 610. Avoidance hole.

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0034] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] like Figures 1 to 4As shown, in some embodiments, a battery cell fixing device 10 includes a heat conductive member 100, a corrugated plate 200 and a support member 300. One side of the heat conductive member 100 is used to fix the battery cell 400. The corrugated plate 200 is connected to the other side of the heat conductive member 100. The corrugated plate 200 is an elastic structure, and the support member 300 is connected to the side of the corrugated plate 200 facing away from the heat conductive member 100. The support member 300 and the heat conductive member 100 enclose a receiving cavity, and the corrugated plate 200 is arranged in the receiving cavity. When the expanded battery cell 400 applies a force to the heat conductive member 100 close to the support member 300, the corrugated plate 200 can undergo elastic deformation, and the heat conductive member 100 can move in a direction close to the support member 300.

[0039] When the battery cell 400 expands, it will exert a force on the heat conductor 100 close to the support member 300. At this time, the corrugated plate 200 can undergo elastic deformation, and the heat conductor 100 can move in the direction close to the support member 300, which can provide a buffer space for the expansion of the battery cell 400, and prevent the battery cell 400 from directly squeezing the adjacent support member 300, thereby effectively preventing the interface between the support member 300 and the battery cell 400 from separating, reducing the risk of displacement and damage of the circuit inside the battery and short circuit of the battery cell 400. In addition, in the related art, the rigid shell of the square shell battery cell 400 and the flexible packaging of the soft pack battery cell 400 make it impossible to achieve co-linear assembly of traditional insulating components. The battery cell fixing device 10 is a flexible design, suitable for soft packs, square shells, cylinders, etc.

[0040] In some embodiments, the thermal conductor 100 may be a plate-like structure. The plate-like structure has a large planar surface area, allowing the thermal conductor 100 to fully adhere to the surface of the battery cell 400. This increases the contact area between the thermal conductor 100 and the battery cell 400, more effectively transferring heat generated by the battery cell 400, ensuring uniform temperature distribution during operation and preventing local overheating from affecting the performance of the battery cell 400.

[0041] Specifically, the heat conducting member 100 may be an aluminum plate. Aluminum has high thermal conductivity and can quickly conduct heat generated by the battery cell 400, effectively reducing the temperature of the battery cell 400 and improving battery performance and safety.

[0042] Specifically, the thickness of the thermal conductor 100 can be 0.1 to 0.2 mm. A thermal conductor 100 within this thickness range ensures sufficient material to conduct heat without increasing thermal resistance due to excessive thickness, which would affect the speed of heat transfer. A thinner thermal conductor 100 allows heat to transfer more quickly from the battery cell 400 to the surface of the thermal conductor 100 and then dissipate into the surrounding environment.

[0043] Specifically, the shape of the heat conducting member 100 may be U-shaped or square.

[0044] like Figure 5 As shown, specifically, the heat conductor 100 includes a first plate 110, a second plate 120 and a third plate 130. The second plate 120 and the third plate 130 are respectively connected to the two ends of the width direction of the first plate 110. One side of the first plate 110 is used to fix the battery cell 400. The first plate 110 is the contact surface and fixing surface of the battery cell 400. The second plate 120 and the third plate 130 are arranged opposite to each other. The first plate 110, the second plate 120 and the third plate 130 form a frame structure with an accommodating space, forming a relatively stable structure that can closely cooperate with the battery cell 400, and the functions of fixing the battery cell 400 and heat conduction are realized through the coordinated action of the first plate 110, the second plate 120 and the third plate 130.

[0045] Specifically, the second plate 120 and the third plate 130 are perpendicular to the first plate 110, forming a U-shaped structure. This arrangement creates a spatially regular shape for the thermal conductor 100, facilitating its integration and assembly with other components. Furthermore, this structure better accommodates the shape and size of the battery cell 400, improving the overall space utilization of the battery cell fixture 10.

[0046] Specifically, the second plate body 120 and the third plate body 130 have the same shape and size.

[0047] Specifically, the second plate 120 is provided with a plurality of equidistant exhaust holes 121. The exhaust holes 121 can discharge the gas generated by the battery cell 400, preventing gas accumulation from damaging the battery cell 400 and ensuring the normal operation of the battery cell 400. In addition, the exhaust holes 121 can improve the heat dissipation efficiency of the thermal conductor 100, help reduce the temperature of the battery cell 400, extend the service life of the battery cell 400, and improve the safety and stability of the battery system. In addition, the equidistant arrangement makes gas discharge and heat convection more uniform, further enhancing the heat dissipation and exhaust effects.

[0048] Specifically, the heat conducting member 100 is fixed to the corrugated plate 200 by laser welding. Laser welding can form a high-strength connection between the heat conducting member 100 and the corrugated plate 200.

[0049] Specifically, the battery cell fixing device 10 includes a sensor, which is arranged on the side of the heat conductor 100 facing the battery cell 400. The sensor can be connected to the battery cell 400. The sensor is used to collect data from the battery cell 400. The sensor can be a micro pressure sensor, a temperature acquisition sensor, or a voltage acquisition sensor. By collecting data such as the pressure, temperature, and voltage of the battery cell 400, the working status of the battery cell 400 during the charging and discharging process can be understood in real time. For example, the micro pressure sensor can monitor the expansion pressure of the battery cell 400 and detect any abnormal expansion of the battery cell 400 in advance. The temperature acquisition sensor can detect overheating of the battery cell 400 in a timely manner to avoid thermal runaway. The voltage acquisition sensor can monitor the charge and discharge voltage of the battery cell 400 and determine the charge state of the battery cell 400. These data provide an important basis for evaluating the health status of the battery cell 400.

[0050] like Figure 3 and Figure 4 As shown, in some embodiments, the battery cell securing device 10 includes a buffer 600. The buffer 600 is disposed between the thermal conductor 100 and the corrugated plate 200. The buffer 600 can buffer the forces acting between the thermal conductor 100 and the corrugated plate 200, absorbing the expansion of the battery cells 400 and compensating for differences in thickness within the battery cells 400. The buffer 600 has excellent elasticity and flexibility. When the battery cells 400 expand or other external forces cause relative movement or forces between the thermal conductor 100 and the corrugated plate 200, the buffer 600 can elastically deform. The buffer 600 uses its elastic force to partially offset the forces, thereby buffering the impact forces between the thermal conductor 100 and the corrugated plate 200 and preventing damage to the thermal conductor 100 and the corrugated plate 200 due to sudden, large forces. Furthermore, the battery cells 400 expand during charging and discharging, and thickness differences may exist between different battery cells 400. The elasticity of the buffer 600 allows it to adapt to these thickness differences. When the battery cell 400 expands, the buffer 600 can be compressed, providing space for the expansion of the battery cell 400. The buffer 600 can fill these gaps through its own elastic deformation to compensate for the thickness differences of the battery cells 400, ensuring the tightness and stability of the internal structure of the entire battery cell fixture 10. Specifically, the buffer 600 can be a foam layer.

[0051] Specifically, the shape and size of the buffer member 600 are adapted to the shape and size of the first plate body 110. This arrangement ensures that the buffer member 600 can fully buffer the force between the first plate body 110 and the corrugated plate 200.

[0052] Specifically, the buffer member 600 may be a square plate-shaped structure.

[0053] Specifically, a plurality of avoidance holes 610 are formed on the buffer member 600 , and the corrugated plate 200 can be welded to the heat conducting member 100 through the avoidance holes 610 .

[0054] like Figure 4 As shown, in some embodiments, the accommodating cavity is filled with aerogel particle insulation and fireproofing material 500. That is, the aerogel particle insulation and fireproofing material 500 is filled between the heat conducting member 100 and the corrugated plate 200. The aerogel particle insulation and fireproofing material 500 is also filled between the corrugated plate 200 and the support member 300. This aerogel particle insulation and fireproofing material can form a heat barrier layer.

[0055] It should be noted that aerogel particle insulation and fireproofing material 500 is typically made of a material with low thermal conductivity. The structure of the corrugated plate 200 creates additional filling space for the accommodating cavity. This structure not only ensures sufficient space for the aerogel particle insulation and fireproofing material 500, but also, through the tight fit between the corrugated plate 200, the heat conductive member 100, and the support member 300, ensures the stability of the aerogel particle insulation and fireproofing material 500 within the cavity, preventing it from shaking or shifting during battery operation, thereby continuously and effectively performing its thermal barrier function.

[0056] Aerogel particles are granular and can be flexibly filled into the cavities between the thermal conductor 100 and the corrugated plate 200, and between the corrugated plate 200 and the support member 300. These particles can be freely arranged to accommodate the shape and spatial variations of the cavity, fully filling every corner and ensuring no obvious heat conduction paths. Furthermore, the aerogel particles possess a certain degree of flexibility and compressibility. Even in the event of expansion of the battery cell 400 or vibration of the device, they can adapt to even minor spatial changes, maintaining a well-filled state and maintaining the thermal barrier effect.

[0057] like Figure 3 and Figure 4 As shown, in some embodiments, a plurality of corrugated plates 200 are provided, and the plurality of corrugated plates 200 are spaced apart between the heat conducting member 100 and the support member 300. Specifically, the plurality of corrugated plates 200 are spaced apart along the width direction of the support member 300. The corrugated direction of the corrugated plates 200 extends along the width direction of the support member 300. The width direction of the support member 300 is the width direction of the support member 300. Figure 4 The left and right horizontal directions.

[0058] Specifically, the corrugated plate 200 is located on one side of the heat conductor 100, and the battery cell 400 is located on the other side of the heat conductor. Different battery cells 400 differ in size, degree of expansion, etc., and a plurality of corrugated plates 200 arranged at intervals can better adapt to these differences through their respective elastic deformation and position fine-tuning according to actual conditions. In addition, when the battery cell 400 expands, the plurality of corrugated plates 200 arranged at intervals can disperse the pressure transmitted from the heat conductor 100 to each corrugated plate 200. Since each corrugated plate 200 can undergo elastic deformation independently, the pressure from the heat conductor 100 is dispersed, preventing a single corrugated plate 200 from being subjected to excessive pressure, thereby effectively buffering the force generated by the expansion of the battery cell 400.

[0059] like Figures 6 to 8 As shown, specifically, the corrugated plate 200 includes an insulating sleeve 210 and a memory alloy plate 220 . The memory alloy plate 220 is corrugated, and the insulating sleeve 210 is sleeved outside the memory alloy plate 220 .

[0060] Specifically, the insulating sleeve 210 is made of insulating material and is sleeved outside the memory alloy plate 220 to prevent current from being conducted to other components through the memory alloy plate 220, thereby achieving electrical isolation.

[0061] It should be noted that the memory alloy plate 220 is designed to a specific shape at a preset temperature. The memory alloy plate 220 is then placed in a mold and injection molded to form the rubber-coated insulation sleeve 210. The insulation sleeve 210 is injection molded from continuous glass fiber-reinforced polyphenylene sulfide (PPS). Specifically, the preset temperature for the memory alloy plate 220 to achieve the desired shape can be 90°C.

[0062] The memory alloy plate 220 has a shape memory effect and can maintain a preset shape within a preset temperature range. When the temperature changes, the crystal structure inside the memory alloy plate 220 undergoes a phase transition, causing its shape to change. During battery operation, if abnormally high temperatures occur and the temperature reaches the phase transition temperature of the memory alloy, the memory alloy plate 220 will change shape to adapt to the thermal expansion of the battery cell 400 or other heat-related changes. For example, when the temperature of the memory alloy plate 220 is greater than 90°C, it will produce a 0.3-0.5mm waveform contraction. When the battery cell 400 experiences thermal runaway, the temperature of the battery cell 400 and the memory alloy plate 220 is greater than 90°C, the memory alloy plate 220 will contract, the wave width of the memory alloy plate 220 will increase, and the aerogel particle insulation and fireproof material 500 will expand, increasing the insulation space and more effectively preventing thermal runaway from spreading between the battery cells 400.

[0063] Specifically, the top surface of the memory alloy plate 220 is flat, thereby increasing the contact area between the memory alloy plate 220 and the heat conducting plate, ensuring that the heat of the battery cell 400 is transferred to the memory alloy plate 220 through the heat conducting plate.

[0064] Please refer to Figure 8 and Figure 13 In some embodiments, the memory alloy plate 220 is provided with a through-hole 221, and the insulating sleeve 210 is provided with a protrusion 211, which is disposed within the through-hole 221. The protrusion 211 on the memory alloy plate 220 penetrates the through-hole 221 of the insulating sleeve 210, forming a mechanical anchoring structure. The protrusion 211 and the inner wall of the through-hole 221 are in close contact and mutually restrained, thereby enhancing the composite strength of the memory alloy plate 220 and the insulating sleeve 210.

[0065] It should be noted that the protrusion 211 can pass through the through hole 221 and the avoidance hole 610 of the buffer 600 to contact the heat conducting member 100 , and the heat conducting member 100 and the memory alloy plate 220 are welded together through the protrusion 211 .

[0066] Specifically, the protrusion 211 may be cylindrical, and the through hole 221 may be a circular through hole 221 .

[0067] Specifically, the protrusion 211 can be provided in a plurality, and the through-hole 221 can be provided in a plurality, with the plurality of protrusions 211 being provided in a one-to-one correspondence with the plurality of through-holes 221. The plurality of correspondingly provided protrusions 211 and through-holes 221 increase the number of connection points between the memory alloy plate 220 and the insulating sleeve 210. The cooperation between each protrusion 211 and the through-hole 221 provides a bonding force for the connection between the memory alloy plate 220 and the insulating sleeve 210. The plurality of connection points work together to enhance the overall connection firmness between the memory alloy plate 220 and the insulating sleeve 210.

[0068] Specifically, a plurality of protrusions 211 are equidistantly disposed on the insulating sleeve 210 . A plurality of through holes 221 are equidistantly disposed on the memory alloy plate 220 .

[0069] like Figure 9 As shown, in some embodiments, along the length direction of the support member 300, the support member 300 has a first outer side and a second outer side, the first outer side of the support member 300 is provided with a first limiting member 310, and the second outer side of the support member 300 is provided with a second limiting member 320, the first limiting member 310 and the second limiting member 320 are arranged opposite to each other, and the heat conductor 100 is arranged between the first limiting member 310 and the second limiting member 320, and the first limiting member 310 and the second limiting member 320 jointly limit the movement of the heat conductor 100 along the length direction of the support member 300.

[0070] Along the width direction of the support member 300, the support member 300 has a third outer side and a fourth outer side. The third outer side of the support member 300 is provided with a third limiting member 330, and the fourth outer side of the support member 300 is provided with a fourth limiting member 340. The third limiting member 330 and the fourth limiting member 340 are arranged opposite to each other, and the heat conducting member 100 is arranged between the third limiting member 330 and the fourth limiting member 340. The third limiting member 330 and the fourth limiting member 340 jointly limit the movement of the heat conducting member 100 along the width direction of the support member 300.

[0071] like Figure 10 As shown, this structure clearly restricts the movement of the thermal conductor 100 to the vertical direction, providing precise guidance for the movement of the thermal conductor 100 when the battery cell 400 expands. When the battery cell 400 expands and generates a force toward the support member 300, the thermal conductor 100 can move smoothly in the vertical direction as designed, effectively buffering the pressure caused by the expansion of the battery cell 400, protecting the battery cell 400 and other components from excessive compression and damage, and ensuring stable operation of the battery system despite the expansion of the battery cell 400.

[0072] Specifically, the first position-limiting member 310 and the second position-limiting member 320 can both be long, plate-like structures. The first position-limiting member 310 and the second position-limiting member 320 have the same shape and size.

[0073] like Figure 9 As shown, specifically, the first limiting member 310 and the second limiting member 320 are each provided with a plurality of reserved holes 350. The plurality of reserved holes 350 are used for the wiring harness to pass through.

[0074] Specifically, the third limiting member 330 and the fourth limiting member 340 can both be long strip-shaped plate-like structures. The third limiting member 330 and the fourth limiting member 340 have the same shape and size.

[0075] like Figure 10 As shown, in another embodiment, a battery system includes a plurality of battery cells 400 and a plurality of the above-mentioned battery cell fixing devices 10 , wherein the plurality of battery cell fixing devices 10 correspondingly fix the plurality of battery cells 400 , and two adjacent battery cell fixing devices 10 are connected.

[0076] Specifically, let the height of the battery cell fixing device 10 be h. Let the thickness of the battery cell 400 be H, then 0.8H≤h≤1.2H, so that the battery cell fixing device 10 is compatible with battery cells 400 of different sizes. If the height h of the battery cell fixing device 10 is too small, the battery cell 400 may be excessively squeezed when expanding, causing damage to the battery cell 400. If the height h of the battery cell fixing device 10 is too large, the battery cell 400 may have a large space to move inside the battery cell fixing device 10. When subjected to external forces such as vibration, the battery cell 400 may collide with internal components of the battery cell fixing device 10, which will also affect the performance and lifespan of the battery cell 400. When the height of the battery cell fixing device 10 is within this range, it can provide a suitable buffer space for the battery cell 400 during the expansion or contraction process of the battery cell 400, ensuring that the battery cell 400 is always in a relatively stable and protected state within the device.

[0077] like Figures 10 to 12 Specifically, along the length of the support member 300 of the battery cell securing device 10, a snap-on portion 360 is provided at one end of the support member 300, and a snap-on groove 370 is provided at the other end of the support member 300, which is compatible with the snap-on portion 360. The snap-on portion 360 of one support member 300 can be snapped into the snap-on groove 370 of the other support member 300. The snap-on portion 360 has a specific shape, and the shape of the snap-on groove 370 corresponds to the snap-on portion 360. When the snap-on portion 360 of one support member 300 is aligned with the snap-on groove 370 of the other support member 300 and a certain external force is applied, the snap-on portion 360 can be snapped into the snap-on groove 370. At this time, the snap-on portion 360 interacts with the inner wall of the snap-on groove 370, generating friction and mechanical engagement, thereby firmly connecting the two support members 300 together.

[0078] Specifically, the buckle portion 360 may be a dovetail block, and the buckle groove 370 may be a dovetail groove.

[0079] In some embodiments, the support member 300 is provided with a rack 380 and a toothed buckle 390. A hook 391 is provided in the toothed buckle 390. The rack 380 is arranged along the height direction of the support member 300 and is provided with a plurality of teeth 381. Along the height direction of the support member 300, the rack 380 of one support member 300 can be inserted into the toothed buckle 390 of the other support member 300, and the teeth 381 and the hook 391 are meshed and connected.

[0080] It should be noted that the multiple teeth 381 on the rack 380 cooperate with the hooks 391 in the tooth buckle 390. When the rack 380 of one support member 300 is inserted into the tooth buckle 390 of the other support member 300 along the height direction of the support member 300, the teeth 381 and the hooks 391 will be tightly engaged together. This meshing connection method utilizes the interaction force between the teeth 381 and the hooks 391 to form a stable connection structure that can withstand tension and pressure in a certain direction and prevent the two support members 300 from sliding or separating relative to each other in the height direction. In addition, by adjusting the position of the teeth 381 inserted into the hooks 391, the distance between the two support members 300, and then the distance between the two battery cells 400, can be adjusted to accommodate the volume of the expanded battery cells 400.

[0081] Specifically, the rack 380 may be a wedge-shaped rack 380. The tooth buckle 390 may be a wedge-shaped tooth buckle 390. The teeth 381 may be trapezoidal teeth.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery cell fixing device, characterized in that: include: A heat conducting member, one side of which is used for fixing the battery core; a corrugated plate connected to the other side of the heat conducting member, the corrugated plate being an elastic structure; and A support member is connected to the side of the corrugated plate facing away from the heat conducting member. The support member and the heat conducting member enclose a receiving cavity, and the corrugated plate is arranged in the receiving cavity.

2. The battery core fixing device according to claim 1, characterized in that: The battery core fixing device includes a buffer component, which is arranged between the heat conducting component and the corrugated plate.

3. The battery core fixing device according to claim 2, characterized in that: The buffer member is provided with a plurality of avoidance holes, and the corrugated plate can be welded to the heat conducting member through the avoidance holes.

4. The battery core fixing device according to claim 1, characterized in that: The accommodating cavity is filled with aerogel particle heat-insulating and fire-proof material.

5. The battery core fixing device according to claim 1, characterized in that: A plurality of corrugated plates are provided, and the plurality of corrugated plates are arranged at intervals between the heat conducting member and the supporting member.

6. The battery core fixing device according to claim 1, characterized in that: The corrugated plate includes an insulating sleeve and a memory alloy plate. The memory alloy plate is corrugated, and the insulating sleeve is arranged outside the memory alloy plate.

7. The battery core fixing device according to claim 6, characterized in that: The memory alloy plate is provided with a through hole, the insulating sleeve is provided with a convex portion, and the convex portion is passed through the through hole.

8. The battery core fixing device according to claim 1, characterized in that: Along the length direction of the support member, the support member has a first outer side and a second outer side, the first outer side of the support member is provided with a first limit member, the second outer side of the support member is provided with a second limit member, the first limit member and the second limit member are arranged opposite to each other, the heat conducting member is arranged between the first limit member and the second limit member, and the first limit member and the second limit member jointly limit the movement of the heat conducting member along the length direction of the support member; and / or Along the width direction of the support member, the support member has a third outer side and a fourth outer side, the third outer side of the support member is provided with a third limit member, and the fourth outer side of the support member is provided with a fourth limit member, the third limit member and the fourth limit member are arranged opposite to each other, and the heat conductor is arranged between the third limit member and the fourth limit member, and the third limit member and the fourth limit member jointly limit the movement of the heat conductor along the width direction of the support member.

9. The battery core fixing device according to claim 1, characterized in that: The heat conducting member includes a first plate, a second plate, and a third plate. The second plate and the third plate are respectively connected to both ends of the first plate in a width direction. One side of the first plate is used to fix the battery cell. The second plate is arranged opposite to the third plate. The first plate, the second plate, and the third plate form a frame structure with an accommodating space. The second plate is provided with a plurality of exhaust holes spaced equidistantly.

10. The battery core fixing device according to claim 1, characterized in that: The battery core fixing device includes a sensor, which is arranged on the side of the heat conductive member facing the battery core. The sensor is used to be connected to the battery core, and the sensor can collect data of the battery core.

11. A battery system, characterized in that: It comprises a plurality of battery cells and a plurality of battery cell fixing devices according to any one of claims 1 to 10, wherein the plurality of battery cell fixing devices correspondingly fix the plurality of battery cells, and two adjacent battery cell fixing devices are connected.

12. The battery system according to claim 11, characterized in that Along the length direction of the support member of the battery cell fixing device, a snap portion is provided at one end of the support member, and a snap groove adapted to the snap portion is opened at the other end of the support member, wherein the snap portion of one support member can be snapped into the snap groove of the other support member.

13. The battery system according to claim 11, wherein: The support member is provided with a rack and a tooth buckle, a hook is provided in the tooth buckle, the rack is arranged along the height direction of the support member, and a plurality of teeth are provided on the rack; Along the height direction of the supporting members, the rack of one of the supporting members can be inserted into the tooth buckle of the other supporting member, and the teeth are engaged and connected with the buckle hook.

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