Battery cell support, battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a battery cell bracket, a battery module and a battery pack. The battery cell bracket comprises a bracket body, the frame body is provided with a mounting groove. The mounting groove is configured to mount a battery cell. And a pressure relief hole is formed in the groove bottom surface of the mounting groove. And the pressure relief hole corresponds to the position of an anti-explosion valve of the battery cell. The frame body is connected with a flow guide part which is arranged in a protruding mode in the direction away from a groove opening of the installation groove. The flow guide piece covers part of the pressure relief hole. The flow guide piece is configured to enable gas to be discharged in the preset direction after passing through the pressure relief hole. Therefore, gas generated in the battery cell can be discharged out of the bracket body from the pressure relief hole after overflowing from the anti-explosion valve, so that potential safety hazards caused by accumulation of the gas in the battery cell bracket are prevented, and the safety of the battery module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technology field, concretely relates to a battery cell support, battery module and battery pack. BACKGROUND

[0002] In the related art, an explosion-proof valve is usually arranged on the battery cell to ensure the safety of the battery cell in case of thermal runaway. In a battery module, the battery cell is usually mounted on a battery cell support. No corresponding pressure relief channel is arranged on the battery cell support, so that the gas generated by the battery cell due to thermal runaway cannot be quickly discharged after the battery cell is relieved through the explosion-proof valve, and a safety hazard exists. SUMMARY

[0003] The embodiments of the utility model provide a battery cell support, a battery module and a battery pack, which can discharge the gas generated by the battery cell due to thermal runaway through the pressure relief hole, so as to at least partially solve the above technical problems.

[0004] In a first aspect, the embodiments of the utility model provide a battery cell support, comprising:

[0005] a support body provided with a mounting groove configured to mount a battery cell, wherein a bottom surface of the mounting groove is provided with a pressure relief hole corresponding to the position of an explosion-proof valve of the battery cell;

[0006] wherein the support body is connected with a flow guide member protruding away from the mounting groove opening direction, the flow guide member covers part of the pressure relief hole, and the flow guide member is configured to make the gas discharged along a preset direction after passing through the pressure relief hole.

[0007] In an embodiment, the flow guide member comprises:

[0008] a shielding part spaced apart from the support body and covering part of the pressure relief hole;

[0009] a connecting part connected between the shielding part and the support body, wherein the connecting part extends along the periphery of the pressure relief hole, and a flow guide outlet is formed on the connecting part, the flow guide outlet communicates with the pressure relief hole, and the flow guide outlet is oriented in the preset direction.

[0010] In an embodiment, along a first direction, at least two layers of mounting areas are arranged on the support body, each layer of the mounting area comprises at least two mounting grooves, and the at least two mounting grooves are spaced apart along a second direction, wherein the first direction and the second direction are arranged at an angle.

[0011] In an embodiment, the flow guide outlets in the same mounting area are oriented in the same direction, and the flow guide outlets in the adjacent two layers of mounting areas are oriented in different directions.

[0012] In one embodiment, the frame has two installation areas, and the flow outlets of the two installation areas are arranged opposite to each other.

[0013] In one embodiment, at least a portion of the mounting groove wall surface is formed with a mounting notch, which is configured to mount a temperature sensor.

[0014] In one embodiment, the mounting slot is configured as a circular slot for mounting cylindrical battery cells, wherein the mounting slots located in different mounting areas are staggered along the first direction.

[0015] In one embodiment, the bottom surface of the mounting groove is further provided with a through hole, which is configured to allow the positive or negative terminal of the battery cell to pass through.

[0016] In one embodiment, a heat insulation component is connected to the side of the frame away from the mounting slot opening.

[0017] In one embodiment, the frame body has a positioning part on the side away from the mounting slot opening, and the heat insulation member has a positioning hole, which is engaged with the positioning part.

[0018] Secondly, embodiments of this utility model provide a battery module, comprising:

[0019] First support;

[0020] The second support is spaced apart from the first support;

[0021] The battery cell is connected between the first bracket and the second bracket;

[0022] Wherein, at least one of the first bracket and the second bracket adopts the cell bracket as described above.

[0023] In one embodiment, the first bracket and the second bracket are spaced apart in a horizontal direction, so that the battery cell is horizontally connected between the first bracket and the second bracket.

[0024] In one embodiment, along a first direction, the frame is provided with at least two installation areas, each of the installation areas including at least two installation slots, the at least two installation slots being spaced apart along a second direction, the first direction being at an angle to the second direction;

[0025] A heat-conducting component is provided between each two adjacent installation areas, and the heat-conducting component is thermally coupled to the outer surface of the battery cell.

[0026] Thirdly, embodiments of this utility model provide a battery pack, including the battery module as described above.

[0027] In an embodiment, the battery module is arranged as at least two, and a heat insulation member is arranged between each two adjacent battery modules.

[0028] In an embodiment, the heat insulation member abuts against the flow guide of the frame body, so as to form a pressure relief channel between the heat insulation member and the outer surface of the frame body, and the pressure relief hole is in communication with the pressure relief channel.

[0029] In an embodiment, the pressure relief channel includes a first pressure relief channel, a second pressure relief channel and a third pressure relief channel, and the heat insulation member includes:

[0030] a first heat insulation layer, connected to one of the frame bodies and forming the first pressure relief channel between the first heat insulation layer and the outer surface of the frame body;

[0031] a second heat insulation layer, arranged in a spaced manner with the first heat insulation layer, connected to another of the frame bodies and forming the second pressure relief channel between the second heat insulation layer and the outer surface of the frame body;

[0032] a third heat insulation layer, arranged between the first heat insulation layer and the second heat insulation layer;

[0033] wherein, in the first direction, the height of the third heat insulation layer is less than the height of the first heat insulation layer and the second heat insulation layer, so as to form the third pressure relief channel between the first heat insulation layer and the second heat insulation layer, the first heat insulation layer and the second heat insulation layer are flexible heat insulation layers, the first heat insulation layer is configured to deform when pressure relief occurs, so as to make the first pressure relief channel and the third pressure relief channel conductive, and the second heat insulation layer is configured to deform when pressure relief occurs, so as to make the second pressure relief channel and the third pressure relief channel conductive.

[0034] The beneficial effects of the embodiments of the present application are as follows:

[0035] In the embodiments of the present application, the cell is installed by constructing the installation groove on the frame body, and the pressure relief hole is arranged on the groove bottom surface, and since the position of the pressure relief hole corresponds to the position of the explosion-proof valve of the cell, when the cell occurs thermal runaway and causes the explosion-proof valve to open, the gas generated in the cell can be discharged out of the frame body from the pressure relief hole after overflowing from the explosion-proof valve, so as to prevent the gas from accumulating in the cell support and causing safety hazards, and the safety of the battery module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating any creative labor.

[0037] Figure 1 is a structural schematic view of the battery cell support provided by the embodiment of the utility model;

[0038] Figure 2 is a structural schematic view of the battery cell support provided by the embodiment of the utility model;

[0039] Figure 3 is a structural schematic view of the battery module provided by the embodiment of the utility model;

[0040] Figure 4 is Figure 3 an explosion view;

[0041] Figure 5 is Figure 3 a sectional view of the battery module provided by the embodiment of the utility model;

[0042] Figure 6 is Figure 5 an enlarged view of part A in the embodiment of the utility model;

[0043] Figure 7 is a partial enlarged view of the battery cell support at one of the mounting grooves provided by the embodiment of the utility model.

[0044] Reference signs:

[0045] 10-battery cell support, 110-mounting groove, 120-pressure relief hole, 130-mounting notch, 140-through hole, 150-positioning part, 160-supporting part, 20-flow guide piece, 210-obstruction part, 220-connecting part, 230-flow guide outlet, 30-heat insulation piece, 310-positioning hole, 320-first heat insulation layer, 330-second heat insulation layer, 340-third heat insulation layer, 40-battery module, 410-first support, 420-second support, 430-battery cell, 50-first pressure relief channel, 60-second pressure relief channel, 70-third pressure relief channel. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific direction is the direction of the drawing in the drawings.

[0047] like Figures 1 to 7 As shown, this application embodiment provides a battery cell support 10. The battery cell support 10 includes a frame. The frame is provided with a mounting groove 110. The mounting groove 110 is configured to mount a battery cell 430. The bottom surface of the mounting groove 110 is provided with a pressure relief hole 120. The pressure relief hole 120 corresponds to the position of the explosion-proof valve of the battery cell 430.

[0048] In this embodiment, the battery cell 430 is installed by constructing an installation groove 110 on the frame. A pressure relief hole 120 is provided on the bottom surface of the installation groove 110. Since the pressure relief hole 120 corresponds to the position of the explosion-proof valve of the battery cell 430, when the battery cell 430 experiences thermal runaway and causes the explosion-proof valve to open, the gas generated inside the battery cell 430 can be discharged from the frame through the pressure relief hole 120 after overflowing from the explosion-proof valve. This prevents the gas from accumulating in the battery cell support 10 and causing safety hazards, thereby improving the safety of the battery module 40.

[0049] In some embodiments, the frame is made of plastic material. Therefore, the frame with the mounting groove 110 can be directly formed by injection molding. The shape, size, and other parameters of the mounting groove 110 can be reasonably set based on the shape and size of the battery cell 430.

[0050] For example, when cell 430 is a cylindrical cell, the mounting slot 110 is a circular slot. The cylindrical cell can be mounted horizontally on the frame. Alternatively, the cylindrical cell can be mounted vertically on the frame. For example, when cell 430 is a prismatic cell, the mounting slot 110 is a square slot.

[0051] In this embodiment of the application, the position of the pressure relief hole 120 corresponding to the explosion-proof valve of the battery cell 430 means that: along the direction perpendicular to the bottom surface of the tank, the projection of the pressure relief hole 120 and the projection of the explosion-proof valve are exactly coincident; or, the projection of the pressure relief hole 120 is larger than the projection of the explosion-proof valve, and the projection of the pressure relief hole 120 covers the projection of the explosion-proof valve.

[0052] It should be noted that the shape of the pressure relief hole 120 can be set to any shape such as circular, elliptical, square, waist-shaped, arc-shaped, etc., as long as the pressure relief hole 120 can cover the explosion-proof valve of the battery cell 430.

[0053] like Figure 1 As shown, the frame also has a support portion 160 on one side of the mounting slot 110 opening. The support portion 160 can be used to support the battery cell 430. For example, when the battery cell 430 is a cylindrical battery cell, the support portion 160 has an arc-shaped surface so that the cylindrical battery can be horizontally mounted in the mounting slot 110 and the cylindrical battery cell can be supported.

[0054] like Figure 2As shown, in some embodiments, the frame body is connected with a flow guide 20 protruding away from the direction of the slot opening of the mounting slot 110. The flow guide 20 covers part of the pressure relief hole 120. The flow guide 20 is configured to make the gas discharged along a preset direction after passing through the pressure relief hole 120.

[0055] It can be understood that when the explosion-proof valve is opened to discharge the gas generated by the battery cell 430, if it is directly discharged from the pressure relief hole 120, it may cause the gas to flow randomly in the battery box and cause safety hazards. In the embodiments of the present application, the flow guide 20 is arranged on the frame body, and the flow guide 20 can make the gas discharged from the pressure relief hole 120 along a preset direction out of the frame body. Thus, it can ensure that the gas is discharged along the preset direction.

[0056] It should be noted that the preset direction can be an upward direction, a downward direction, a leftward direction, a rightward direction, a leftward upward direction, a leftward downward direction, a rightward upward direction, a rightward downward direction, etc. The direction from which the gas is discharged can be selected based on the model of the battery cell support 10 and the battery cell 430.

[0057] For example, the frame body is provided with two layers of mounting slots 110 arranged in an up-down manner, the flow guide 20 of the mounting slot 110 located in the upper layer can make the gas pass through the pressure relief hole 120 and then be discharged upward out of the frame body, and the flow guide 20 of the mounting slot 110 located in the lower layer can make the gas pass through the pressure relief hole 120 and then be discharged downward out of the frame body.

[0058] As shown, Figure 1 The flow guide 20 is connected to the side of the frame body away from the slot opening of the mounting slot 110. The flow guide 20 is integrally formed with the frame body. The protruding flow guide 20 has a flow guide cavity, and the part of the flow guide 20 not covering the pressure relief hole 120 forms a flow guide outlet 230. When the frame body is provided with the flow guide 20, the flow guide cavity is in communication with the pressure relief hole 120. The gas discharged from the pressure relief hole 120 will enter the flow guide cavity, then flow along the extension direction of the flow guide cavity, and be discharged from the flow guide outlet 230. Thus, the gas can be discharged from the preset direction, ensuring safety.

[0059] Please continue to refer to Figure 1 and Figure 7 In some embodiments, the flow guide 20 includes a shielding portion 210 and a connecting portion 220. The shielding portion 210 is arranged in spaced relation to the frame body, and the shielding portion 210 covers part of the pressure relief hole 120. The connecting portion 220 is connected between the shielding portion 210 and the frame body. The connecting portion 220 extends along the periphery of the pressure relief hole 120. The connecting portion 220 is formed with a flow guide outlet 230. The flow guide outlet 230 is in communication with the pressure relief hole 120. The orientation of the flow guide outlet 230 is the preset direction.

[0060] It can be understood that the shielding portion 210 is adapted to the shape of the pressure relief hole 120 as a structure for shielding and closing the pressure relief hole 120. The connecting portion 220 is a structure for connecting the shielding portion 210 and the frame body, and the flow guide outlet 230 formed on the connecting portion 220 is used for discharging gas to discharge the gas from a preset direction.

[0061] It should be noted that the shielding portion 210 and the frame body are spaced apart along the depth direction of the mounting slot 110, and the shielding portion 210 is located on the side of the frame body away from the mounting slot 110. The spacing width between the shielding portion 210 and the frame body can define the width of the flow guide outlet 230. Based on different models of the battery cell 430, the specific value of the gap width can be selected to ensure the discharge efficiency of the gas.

[0062] In some embodiments, the shielding portion 210, the connecting portion 220 and the frame body are integrally injection molded.

[0063] As shown in Figure 1 and Figure 2 , in some embodiments, at least two layers of mounting areas are provided on the frame body along a first direction. Each layer of mounting area includes at least two mounting slots 110. The at least two mounting slots 110 are spaced apart along a second direction. Wherein, the first direction and the second direction are arranged at an angle.

[0064] It can be understood that based on the provision of at least two layers of mounting areas on the frame body, at least two layers of battery cells 430 can be mounted on the frame body. Since each layer of mounting area includes at least two mounting slots 110, at least two battery cells 430 can be mounted on each layer. Thus, one frame body can mount multiple battery cells 430.

[0065] It should be noted that the first direction and the second direction can be arranged at an acute angle. Alternatively, the first direction and the second direction can be arranged at an obtuse angle. Alternatively, the first direction and the second direction are arranged at a right angle. In the embodiments of the present application, the first direction is preferably perpendicular to the second direction. Please refer to Figure 1 and Figure 2 , the first direction is the height direction of the battery cell support 10, and the second direction is the length direction of the battery cell support 10. At this time, the battery cell 430 is installed horizontally on the battery cell support 10.

[0066] In some embodiments, the first direction can also be the length direction of the battery cell support 10, and the second direction is the width direction of the battery cell support 10. That is, at least two columns of mounting areas are provided on the frame body. Each column of mounting area includes at least two mounting slots 110. At this time, the battery cell 430 is installed vertically on the battery cell support 10.

[0067] In some embodiments, the orientations of the flow guide outlets 230 in the same mounting area are the same. The orientations of the flow guide outlets 230 in the adjacent two layers of mounting areas are different.

[0068] It can be understood that the orientations of the flow guiding outlets 230 in the same installation area are the same, and all the flow guides 20 in the same installation area can discharge the gas generated by the battery cell 430 corresponding to the installation slot 110 in the same direction. For example, all the flow guides 20 in the same installation area can discharge the gas generated by the battery cell 430 corresponding to the installation slot 110 downward. At this time, a pressure relief channel can be constructed below to discharge the gas generated by all the battery cells 430 corresponding to the installation area. The orientations of the flow guiding outlets 230 of the adjacent two layers of installation areas are different, and the flow guides 20 of the adjacent two layers of installation areas can discharge the gas generated by the battery cell 430 corresponding to the installation slot 110 in different directions. For example, the flow guides 20 of the upper and lower two layers of installation areas can discharge the gas generated by the battery cell 430 corresponding to the installation slot 110 upward and downward, respectively. At this time, pressure relief channels can be constructed in different areas to discharge the gas generated by all the battery cells 430 corresponding to the installation area.

[0069] It should be noted that the orientations of the flow guiding outlets 230 of the adjacent two layers of installation areas are different, which means that when the flow guiding outlet 230 of one layer of installation area is arranged upward, the flow guiding outlet 230 of the other layer of installation area can be arranged downward, leftward, rightward, or in any direction other than directly upward.

[0070] When the installation area is arranged in at least three layers, the orientations of the flow guiding outlet 230 of the first layer of installation area and the flow guiding outlet 230 of the Nth layer of installation area can be the same or different. Wherein, N≥3.

[0071] In some embodiments, the frame body is provided with two layers of installation areas. The flow guiding outlets 230 of the two layers of installation areas are arranged oppositely.

[0072] It can be understood that when the frame body has only two layers of installation areas, the flow guiding outlet 230 of the installation area in the upper layer can be arranged upward, and the flow guiding outlet 230 of the installation area in the lower layer can be arranged downward. In this way, a pressure relief channel can be arranged at each of the upper and lower ends of the frame body to discharge the gas generated by all the battery cells 430 corresponding to the upper layer installation area and the gas generated by all the battery cells 430 corresponding to the lower layer installation area, respectively.

[0073] It should be noted that when the two layers of installation areas on the frame body are arranged in an up-down manner, the flow guiding outlets 230 of the two layers of installation areas are arranged upward or downward, respectively. When the two layers of installation areas on the frame body are arranged in a left-right manner, the flow guiding outlets 230 of the two layers of installation areas are arranged leftward or rightward, respectively.

[0074] Please refer to Figure 1 and Figure 2 In some embodiments, the slot wall surface of at least part of the installation slot 110 is formed with an installation gap 130. The installation gap 130 is configured to install a temperature sensor.

[0075] It can be understood that when the battery cell holder 10 is applied to a battery pack, the battery pack needs to monitor the temperature of the battery cell 430. By forming the mounting notch 130 on the groove wall surface of at least part of the mounting groove 110, the temperature sensor can be mounted in the mounting area opening to monitor the temperature of at least part of the battery cell 430.

[0076] For example, only one mounting notch 130 is formed on the groove wall surface of one mounting groove 110 on one frame body, and a temperature sensor is mounted in the one mounting notch 130 to obtain the temperature value of the battery cell 430 at this position, and the temperature value is used to reflect the average temperature of all battery cells 430 on the entire frame body. For example, mounting notches 130 are formed on the groove wall surfaces of four mounting grooves 110 on one frame body, and a temperature sensor is mounted in each mounting notch 130 to obtain the temperature values of the battery cells 430 at the four positions. Among them, the average temperature of all battery cells 430 on the frame body can be reflected by the average value of the four temperature values. The four temperature values can also be judged in real time respectively to monitor the temperature of the battery cell 430 at each position in real time.

[0077] Please refer to Figure 1 and Figure 2 In some embodiments, the mounting groove 110 is provided as a circular groove for mounting a cylindrical battery cell. Among them, the mounting grooves 110 located in different mounting areas are staggered along the first direction.

[0078] It can be understood that the mounting groove 110 is provided as a circular groove to mount a cylindrical battery cell. The mounting grooves 110 located in different mounting areas are staggered along the first direction, which can optimize the distribution of the mounting grooves 110, so that the battery cell 430 can be compactly mounted on the frame body to reduce the height and length of the frame body. Specifically, the mounting grooves 110 of adjacent two layers of mounting areas are circumscribed.

[0079] It should be noted that the mounting grooves 110 located in different mounting areas are staggered, which means that the centers of the mounting grooves 110 located in different mounting areas are staggered.

[0080] Please refer to Figure 1 and Figure 2 In some embodiments, the groove bottom surface of the mounting groove 110 is also provided with a through hole 140. The through hole 140 is configured to pass through the positive or negative terminal of the battery cell 430.

[0081] It is understood that the battery cell 430 has a positive terminal and a negative terminal. The positive terminal has a positive terminal, and the negative terminal has a negative terminal. When the positive terminal of the battery cell 430 is placed in the mounting groove 110, the positive terminal of the battery cell 430 can pass through the through hole 140. After passing through the through hole 140, the positive terminal can be soldered to a connecting piece. This connecting piece can be soldered to the positive or negative terminal of another battery cell 430 to achieve series or parallel connection between adjacent battery cells 430. When the negative terminal of the battery cell 430 is placed in the mounting groove 110, the negative terminal of the battery cell 430 can pass through the through hole 140. After passing through the through hole 140, the negative terminal can be soldered to a connecting piece. This connecting piece can be soldered to the positive or negative terminal of another battery cell 430 to achieve series or parallel connection between adjacent battery cells 430.

[0082] It should be noted that the through hole 140 is spaced apart from the aforementioned pressure relief hole 120. The shape of the through hole 140 is adapted to the shape of the positive or negative terminal of the battery cell 430. When the battery cell 430 is installed in the mounting slot 110, the positive or negative terminal of the battery cell 430 can close the through hole 140. When the battery cell 430 experiences thermal runaway, the gas overflowing from the explosion-proof valve will only be discharged through the pressure relief hole 120.

[0083] The aforementioned matching of the shape of the through-hole 140 with the shape of the positive or negative terminal of the battery cell 430 means that the shape of the through-hole 140 is the same as the shape of the positive or negative terminal of the battery cell 430, and the size of the through-hole 140 is exactly the same as the size of the positive or negative terminal of the battery cell 430. Alternatively, the shape of the through-hole 140 is the same as the shape of the positive or negative terminal of the battery cell 430, and the size of the through-hole 140 is larger than the size of the positive or negative terminal of the battery cell 430.

[0084] like Figure 3 and Figure 4 As shown, in some embodiments, a heat insulation element 30 is connected to the side of the frame away from the mounting slot 110 opening.

[0085] Understandably, installing a heat insulation component 30 on the outer surface of the frame can prevent heat from the battery cells 430 on one frame from being transferred to another. For example, when multiple battery modules 40 are installed inside the battery box, the battery cells 430 within the battery modules 40 are connected through this frame. In this case, the heat insulation component 30 can prevent heat from one battery module 40 from being transferred to another, avoiding temperature interference between different battery modules 40.

[0086] In some embodiments, the thermal insulation member 30 may include two layers of mica sheets spaced apart and foam disposed between the two layers of mica sheets.

[0087] Please see Figure 2 andFigure 4 In some embodiments, the frame body is provided with a positioning portion 150 on the side away from the slot opening of the mounting slot 110. The thermal insulation piece 30 is provided with a positioning hole 310. The positioning hole 310 is clamped on the positioning portion 150.

[0088] It can be understood that the positioning portion 150 and the positioning hole 310 are designed to facilitate the quick installation of the thermal insulation piece 30 on the frame body. For example, the positioning hole 310 is a circular hole, and the positioning portion 150 is a cylindrical structure. For example, the positioning hole 310 is a square hole, and the positioning portion 150 is a square column structure.

[0089] In some embodiments, the frame body is provided with at least two positioning portions 150 arranged at intervals on the side away from the slot opening of the mounting slot 110. Correspondingly, the thermal insulation piece 30 is formed with at least two positioning holes 310 arranged at intervals. A positioning portion 150 corresponds to a positioning hole 310.

[0090] In some embodiments, the positioning portion 150 is integrally formed on the frame body.

[0091] Please refer to Figure 3 and Figure 4 , the application also provides a battery module 40. The battery module 40 includes a first support 410, a second support 420, and a battery cell 430. The first support 410 and the second support 420 are arranged at intervals. The battery cell 430 is connected between the first support 410 and the second support 420. At least one of the first support 410 and the second support 420 adopts the battery cell support 10 in the above-mentioned embodiments.

[0092] In the embodiments of the application, the battery cell 430 is installed by constructing the mounting slot 110 on the frame body, and the relief hole 120 is arranged on the slot bottom surface of the mounting slot 110. Since the relief hole 120 corresponds to the position of the explosion-proof valve of the battery cell 430, when the battery cell 430 is in thermal runaway and the explosion-proof valve is opened, the gas generated inside the battery cell 430 can be discharged from the relief hole 120 out of the frame body after overflowing from the explosion-proof valve, thereby preventing the accumulation of gas in the battery cell support 10 and causing safety hazards, and improving the safety of the battery module 40.

[0093] In some embodiments, only the first support 410 adopts the battery cell support 10 in the above-mentioned embodiments. Alternatively, only the second support 420 adopts the battery cell support 10 in the above-mentioned embodiments. Alternatively, both the first support 410 and the second support 420 adopt the battery cell support 10 in the above-mentioned embodiments.

[0094] In some embodiments, the first support 410 and the second support 420 are arranged at intervals in the horizontal direction, so as to connect the battery cell 430 between the first support 410 and the second support 420 in a horizontal manner.

[0095] It can be understood that, based on the first support 410 and the second support 420 being arranged in a horizontal direction, the battery cell 430 can be connected in a horizontal manner between the first support 410 and the second support 420, and based on the above-mentioned pressure relief hole 120, flow guide 20 and other structural designs, thereby making up for the blank in the thermal runaway design of the horizontal cylindrical battery cell.

[0096] In some embodiments, along a first direction, the frame body is provided with at least two layers of mounting areas. Each layer of mounting area includes at least two mounting slots 110. The at least two mounting slots 110 are arranged in a second direction. The first direction and the second direction are arranged at an angle. Among them, a heat conduction piece is arranged between each adjacent two layers of mounting areas. The heat conduction piece is thermally coupled with the outer surface of the battery cell 430.

[0097] It can be understood that the heat conduction piece can heat or cool the battery cell 430 on its two opposite sides, so that the battery cell 430 is at a suitable working temperature. For example, when the battery cell 430 is in a low-temperature environment, the heat conduction piece can heat each battery cell 430 to increase the temperature of the battery cell 430. When the battery cell 430 is in a high-temperature environment, the heat conduction piece can cool each battery cell 430 to reduce the temperature of the battery cell 430.

[0098] It should be noted that the heat conduction piece is internally formed with a cavity, and the cavity can be used for flowing through a heat exchange liquid. The cavity can be communicated with a liquid storage unit through a pipeline. The liquid storage unit stores the heat exchange liquid. The outlet of the liquid storage unit is provided with a heating unit and a cooling unit. When the battery cell 430 is in a low-temperature environment, the heat exchange liquid discharged from the liquid storage unit can be heated by the heating unit, so that the heat conduction liquid is used to heat each battery cell 430 to increase the temperature of the battery cell 430. When the battery cell 430 is in a high-temperature environment, the heat exchange liquid discharged from the liquid storage unit can be cooled by the cooling unit, so that the heat conduction liquid is used to cool each battery cell 430 to reduce the temperature of the battery cell 430.

[0099] When the battery cell 430 is arranged as a cylindrical battery cell, the heat conduction piece is arranged in a serpentine structure. The cavity in the heat conduction piece can also be arranged in a serpentine shape.

[0100] It should be noted that the heat conduction piece is thermally coupled with the outer surface of the battery cell 430, which means that the heat conduction piece is attached to the outer surface of the battery cell 430. Alternatively, the heat conduction piece is bonded to the outer surface of the battery cell 430 by a heat conduction structure adhesive. In this way, the heat conduction piece and the battery cell 430 can form a heat conduction connection to achieve rapid heat transfer, thereby achieving rapid heating or rapid cooling.

[0101] The application also provides a battery pack. The battery pack includes the battery module 40 as described above.

[0102] In the embodiment of the present application, the battery cell 430 is installed by constructing the installation groove 110 on the frame body, and the pressure relief hole 120 is arranged on the groove bottom surface of the installation groove 110. Since the position of the pressure relief hole 120 corresponds to the position of the explosion-proof valve of the battery cell 430, when the battery cell 430 occurs thermal runaway to cause the explosion-proof valve to open, the gas generated in the battery cell 430 can be discharged from the pressure relief hole 120 after overflowing from the explosion-proof valve, thereby preventing the gas from accumulating in the battery cell support 10 to cause a safety hazard, and improving the safety of the battery pack.

[0103] In some embodiments, the battery pack further comprises a battery box. The battery module 40 is arranged in the battery box. After the plastic battery cell support 10 fixes the battery cell 430, the battery cell 430 is fixed as a whole in the battery box, which can prevent the battery cell 430 from moving when thermal runaway occurs.

[0104] Please refer to Figure 3 and Figure 4 In some embodiments, the battery module 40 is arranged as at least two. The heat insulation member 30 is arranged between each adjacent two battery modules 40.

[0105] It can be understood that the heat insulation member 30 is arranged between the adjacent two battery modules 40, which can prevent the heat of one battery module 40 from being transmitted to another battery module 40, thereby avoiding mutual interference of the temperature between different battery modules 40.

[0106] In some embodiments, the heat insulation member 30 abuts against the flow guide member 20 of the frame body, so as to form a pressure relief channel between the heat insulation member 30 and the outer surface of the frame body. The pressure relief hole 120 is in communication with the pressure relief channel.

[0107] It can be understood that since the heat insulation member 30 abuts against the flow guide member 20 of the frame body, and the flow guide member 20 is arranged spaced apart from the frame body, the heat insulation member 30 is also necessarily arranged spaced apart from the frame body. Thus, a pressure relief channel can be formed between the heat insulation member 30 and the outer surface of the frame body. The pressure relief hole 120 is in communication with the pressure relief channel, so that the gas generated by the battery cell 430 can be discharged along the pressure relief channel after being discharged from the pressure relief hole 120.

[0108] When the frame body has two layers of installation areas, the flow guide outlets 230 of the installation areas located in the upper layer can be arranged upward, and the flow guide outlets 230 of the installation areas located in the lower layer can be arranged downward. At this time, two pressure relief channels can be formed between the heat insulation member 30 and the flow guide member 20. One of the pressure relief channels is arranged close to the upper end of the frame body, so that the pressure relief channel can be in communication with the flow guide outlets 230 of the installation areas located in the upper layer, thereby concentrating and discharging the gas generated by all the battery cells 430 corresponding to the installation areas in the upper layer. The other pressure relief channel is arranged close to the lower end of the frame body, so that the pressure relief channel can be in communication with the flow guide outlets 230 of the installation areas located in the lower layer, thereby concentrating and discharging the gas generated by all the battery cells 430 corresponding to the installation areas in the lower layer.

[0109] Referring to Figure 5 and Figure 6 In some embodiments, the pressure relief channels include a first pressure relief channel 50, a second pressure relief channel 60, and a third pressure relief channel 70. The thermal insulation member 30 includes a first thermal insulation layer 320, a second thermal insulation layer 330, and a third thermal insulation layer 340. The first thermal insulation layer 320 is connected to a frame body and forms the first pressure relief channel 50 with an outer surface of the frame body. The second thermal insulation layer 330 is arranged in a spaced-apart manner with the first thermal insulation layer 320. The second thermal insulation layer 330 is connected to another frame body and forms the second pressure relief channel 60 with an outer surface of the frame body. The third thermal insulation layer 340 is arranged between the first thermal insulation layer 320 and the second thermal insulation layer 330. In the first direction, the height of the third thermal insulation layer 340 is less than the height of the first thermal insulation layer 320 and the second thermal insulation layer 330, so as to form the third pressure relief channel 70 between the first thermal insulation layer 320 and the second thermal insulation layer 330. The first thermal insulation layer 320 and the second thermal insulation layer 330 are both flexible thermal insulation layers. The first thermal insulation layer 320 is configured to deform when pressure relief occurs, so as to make the first pressure relief channel 50 and the third pressure relief channel 70 conductive. The second thermal insulation layer 330 is configured to deform when pressure relief occurs, so as to make the second pressure relief channel 60 and the third pressure relief channel 70 conductive.

[0110] It can be understood that the first pressure relief channel 50 and the second pressure relief channel 60 can respectively make the respective corresponding pressure relief holes 120 conductive, so that each battery module 40 can independently relieve pressure, and realize module-level gas-electric separation. When the first pressure relief channel 50 and / or the second pressure relief channel 60 is insufficient in space, the gas can make the first thermal insulation layer 320 and / or the second thermal insulation layer 330 deform, so as to make the first pressure relief channel 50 and the third pressure relief channel 70 conductive, and / or make the second pressure relief channel 60 and the third pressure relief channel 70 conductive. Thus, it can be ensured that there is sufficient pressure relief space between the two adjacent battery modules 40, and heat spread caused by insufficient pressure relief space can be avoided.

[0111] It should be noted that when the frame body has two layers of installation areas, the flow guide outlets 230 of the installation area on the upper layer can be arranged upward, and the flow guide outlets 230 of the installation area on the lower layer can be arranged downward. The gas generated by the battery cell 430 in the installation area on the upper layer can be discharged upward from the corresponding flow guide outlet 230. Since there is a sufficient space between the upper surface of the battery module 40 and the cover of the battery box, the space can serve as a pressure relief channel on the upper layer. Based on the large space, heat spread caused by insufficient pressure relief space can be avoided. The lower end of the third heat insulation layer 340 can have a gap area, so that at the position close to the bottom plate of the battery box, the first heat insulation layer 320 and the outer surface of the frame body form a first pressure relief channel 50, the second heat insulation layer 330 and the outer surface of the frame body form a second pressure relief channel 60, and the first heat insulation layer 320 and the second heat insulation layer 330 form a third pressure relief channel 70. The gas generated by the battery cell 430 in the installation area on the lower layer can be discharged into the first pressure relief channel 50 or the second pressure relief channel 60. Due to the limitation of the bottom plate of the battery box, the space of the first pressure relief channel 50 or the second pressure relief channel 60 can be insufficient. Based on the flexible design of the first heat insulation layer 320 and the second heat insulation layer 330, the first heat insulation layer 320 and the second heat insulation layer 330 can be deformed after being acted on by the gas to make the first pressure relief channel 50, the second pressure relief channel 60 and the third pressure relief channel 70 communicate with each other. Thus, it can be ensured that the pressure relief channel at the position close to the bottom plate of the battery box has sufficient space, thereby preventing heat spread caused by insufficient pressure relief space.

[0112] The first heat insulation layer 320 is configured to deform when pressure relief, which means that the first heat insulation layer 320 inclines toward the second heat insulation layer 330 under the action of the gas, so that the lower end of the first heat insulation layer 320 forms a gap with the bottom plate of the battery box, thereby making the first pressure relief channel 50 and the third pressure relief channel 70 communicate with each other.

[0113] The second heat insulation layer 330 is configured to deform when pressure relief, which means that the second heat insulation layer 330 inclines toward the first heat insulation layer 320 under the action of the gas, so that the lower end of the second heat insulation layer 330 forms a gap with the bottom plate of the battery box, thereby making the second pressure relief channel 60 and the third pressure relief channel 70 communicate with each other.

[0114] Based on the fact that the first heat insulation layer 320 and the second heat insulation layer 330 are both flexible heat insulation layers, the first heat insulation layer 320 and the second heat insulation layer 330 can both be blown by the gas to realize the mutual communication between the first pressure relief channel 50, the second pressure relief channel 60 and the third pressure relief channel 70. For example, the first heat insulation layer 320 and the second heat insulation layer 330 are both mica sheets. The third heat insulation layer 340 is foam.

[0115] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described in this article by applying specific examples, the above embodiment explanation is only for helping understanding the method and its core thought of the utility model; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery cell support, characterized in that, include: The frame is provided with a mounting slot, which is configured to install battery cells. The bottom surface of the mounting slot is provided with a pressure relief hole, which corresponds to the position of the explosion-proof valve of the battery cell. The frame is connected to a guide member that protrudes away from the mounting slot opening. The guide member covers part of the pressure relief hole and is configured to allow gas to be discharged in a preset direction after passing through the pressure relief hole.

2. The cell support according to claim 1, characterized in that, The flow guide includes: A shielding part is provided at a distance from the frame body, and the shielding part covers part of the pressure relief hole; A connecting part is connected between the shielding part and the frame. The connecting part extends along the periphery of the pressure relief hole. A flow guide outlet is formed on the connecting part. The flow guide outlet communicates with the pressure relief hole. The direction of the flow guide outlet is the preset direction.

3. The cell support according to claim 2, characterized in that, Along the first direction, the frame is provided with at least two installation areas, each of the installation areas including at least two installation slots, and the at least two installation slots are spaced apart along the second direction, wherein the first direction and the second direction are at an angle.

4. The cell support according to claim 3, characterized in that, The flow outlets located in the same installation area have the same orientation, while the flow outlets in adjacent installation areas have different orientations.

5. The cell support according to claim 3, characterized in that, The frame is provided with two installation areas, and the flow outlets of the two installation areas are arranged in opposite directions.

6. The cell support according to claim 3, characterized in that, At least a portion of the mounting groove wall has a mounting notch configured for mounting a temperature sensor.

7. The cell support according to claim 3, characterized in that, The mounting slot is configured as a circular slot for mounting cylindrical battery cells, wherein the mounting slots located in different mounting areas are staggered along the first direction.

8. The cell support according to any one of claims 1 to 7, characterized in that, The bottom surface of the mounting groove is also provided with a through hole, which is configured to allow the positive or negative terminal of the battery cell to pass through.

9. The cell support according to any one of claims 1 to 7, characterized in that, A heat insulation component is connected to the side of the frame away from the mounting slot opening.

10. The cell support according to claim 9, characterized in that, The frame body has a positioning part on the side away from the mounting slot opening, and the heat insulation component has a positioning hole, which is engaged with the positioning part.

11. A battery module, characterized in that, include: First support; The second support is spaced apart from the first support; The battery cell is connected between the first bracket and the second bracket; Wherein, at least one of the first bracket and the second bracket adopts the cell bracket as described in any one of claims 1 to 10.

12. The battery module according to claim 11, characterized in that, The first bracket and the second bracket are arranged at a distance along the horizontal direction, so that the battery cell is horizontally connected between the first bracket and the second bracket.

13. The battery module according to claim 11, characterized in that, Along the first direction, the frame is provided with at least two installation areas, each of the installation areas includes at least two installation slots, and the at least two installation slots are spaced apart along the second direction, with the first direction and the second direction being at an angle. A heat-conducting component is provided between each two adjacent installation areas, and the heat-conducting component is thermally coupled to the outer surface of the battery cell.

14. A battery pack, characterized in that, Includes the battery module as described in any one of claims 11 to 13.

15. The battery pack according to claim 14, characterized in that, The battery module is configured to be at least two, and a heat insulation component is provided between each pair of adjacent battery modules.

16. The battery pack according to claim 15, characterized in that, The heat insulation component abuts against the flow guide component of the frame to form a pressure relief channel between the heat insulation component and the outer surface of the frame, wherein the pressure relief hole is connected to the pressure relief channel.

17. The battery pack according to claim 16, characterized in that, The pressure relief channels include a first pressure relief channel, a second pressure relief channel, and a third pressure relief channel, and the heat insulation component includes: A first heat insulation layer is connected to one of the frames and forms the first pressure relief channel between itself and the outer surface of the frame; A second heat insulation layer is provided at a distance from the first heat insulation layer. The second heat insulation layer is connected to another frame and forms a second pressure relief channel between the second heat insulation layer and the outer surface of the frame. A third heat insulation layer is disposed between the first heat insulation layer and the second heat insulation layer; Wherein, along the first direction, the height of the third heat insulation layer is less than the height of the first heat insulation layer and the second heat insulation layer, for forming the third pressure relief channel between the first heat insulation layer and the second heat insulation layer. The first heat insulation layer and the second heat insulation layer are both flexible heat insulation layers. The first heat insulation layer is configured to deform during pressure relief so that the first pressure relief channel and the third pressure relief channel are connected. The second heat insulation layer is configured to deform during pressure relief so that the second pressure relief channel and the third pressure relief channel are connected.

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