Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of power batteries. The battery module comprises a battery cell assembly, a temperature detection piece and a fixing assembly, and the temperature detection piece is connected and contacted with the battery cell assembly, so that the temperature detection piece can collect the temperature of the battery cell assembly. The fixing part in the fixing assembly is connected with the battery cell assembly, so that the fixing part and the battery cell assembly can be relatively fixed. The pressing part is detachably connected with the fixing part, when the pressing part is connected with the fixing part, the pressing part can be relatively fixed with the battery cell assembly through the fixing part, and the temperature detection piece is clamped between the pressing part and the battery cell assembly, so that the pressing part can press the temperature detection piece towards the battery cell assembly; therefore, the interaction force between the temperature detection piece and the battery cell assembly is larger, the temperature detection piece and the battery cell assembly are more fully and tightly contacted, the temperature detection piece can be prevented from being separated from the battery cell assembly, and the accuracy and stability of temperature sampling can be guaranteed.

Description

Technical Field

[0001] The present application relates to a battery module and a battery pack, belonging to the technical field of power batteries. Background Art

[0002] A battery module is a modular structural component formed by stacking multiple battery cells. During the charging and discharging process, the battery cells will release a certain amount of heat. To ensure the safety and reliability of the operation of the battery module, it is necessary to monitor the temperature of the battery module and perform corresponding processing when the temperature of the battery module is too high. The temperature monitoring of the battery module can be achieved by setting temperature sensors on some of the battery cells.

[0003] Currently, the connection between the temperature sensor and the battery cell can be achieved by bonding with a thermally conductive adhesive layer. However, in the case of long-term use of the battery module, the adhesive between the temperature sensor and the battery cell may age, resulting in insufficient connection and contact between the temperature sensor and the battery cell, and further causing the temperature sensor to be unable to accurately monitor the temperature of the battery cell. Summary of the Utility Model

[0004] The present application provides a battery module and a battery pack, which solve the problem of poor connection reliability between the temperature sensor and the battery cell in the related art, thereby ensuring the accuracy and stability of temperature sampling.

[0005] In a first aspect, the present application provides a battery module, including:

[0006] A battery cell assembly;

[0007] A temperature detection member disposed on the battery cell assembly;

[0008] A fixing assembly including a fixing portion and a pressing portion. The fixing portion is connected to the battery cell assembly, and the pressing portion is detachably connected to the fixing portion. When the pressing portion is connected to the fixing portion, the temperature detection member is clamped between the pressing portion and the battery cell assembly.

[0009] In some embodiments, the battery cell assembly includes a bus bar and a plurality of battery cell monomers. The plurality of battery cell monomers are electrically connected through the bus bar. The temperature detection member is connected to at least part of the plurality of battery cell monomers, and the fixing portion is connected to the bus bar.

[0010] In some embodiments, the fixing portion is thermally riveted to the bus bar.

[0011] In some embodiments, the fixing portion is provided with an avoidance groove, the battery cell assembly has an installation position, the temperature detection member is disposed on the installation position, and at least part of the installation position corresponds to the avoidance groove, and at least part of the pressing portion is disposed in the avoidance groove.

[0012] In some embodiments, the installation position is arranged opposite to the avoidance groove.

[0013] In some embodiments, the avoidance groove is formed on an edge of the fixing portion.

[0014] In some embodiments, the fixing portion has a supporting protrusion, the supporting protrusion is located in the avoidance groove, and the supporting protrusion is connected to the inner wall of the avoidance groove. There is a distance between the supporting protrusion and the opening on the side of the avoidance groove away from the temperature detection part, and the supporting protrusion supports the clamping portion.

[0015] In some embodiments, the fixing portion is fixed to the pressing portion by snapping.

[0016] In some embodiments, the fixing portion further has a snap-fitting protrusion, the pressing portion is provided with a snap-fitting hole, the snap-fitting protrusion is arranged on the supporting protrusion, and the snap-fitting protrusion is suitable for snapping with the snap-fitting hole.

[0017] In some embodiments, the engaging protrusion is located on a side of the supporting protrusion facing away from the temperature detecting component.

[0018] In some embodiments, the battery module further includes an adhesive layer, and the temperature detection element is connected to the battery core assembly through the adhesive layer.

[0019] In some embodiments, the adhesive layer includes a thermally conductive adhesive layer.

[0020] On the second aspect, based on the above battery module, the present application also provides a battery pack, including the above battery module.

[0021] In the battery module provided by the present application, the temperature detection part is connected and in contact with the battery core assembly, so that the temperature detection part can collect the temperature of the battery core assembly. The fixing portion in the fixing assembly is connected to the battery core assembly so that the fixing portion and the battery core assembly can be relatively fixed. The pressing portion is detachably connected to the fixing portion. When the pressing portion is connected to the fixing portion, the pressing portion can be relatively fixed to the battery core assembly through the fixing portion. The temperature detection part is clamped between the pressing portion and the battery core assembly, so that the pressing portion can press the temperature detection part toward the battery core assembly, thereby making the interaction force between the temperature detection part and the battery core assembly greater, and the temperature detection part is in more sufficient and tight contact with the battery core assembly, which can prevent the temperature detection part from separating from the battery core assembly, thereby ensuring the accuracy and stability of temperature sampling. The pressing portion can also be detached from the fixing portion so that the pressing portion is no longer pressed on the temperature detection part, making it easier to disassemble and assemble the temperature detection part, thereby making it easier to replace and repair the temperature detection part, and ultimately making the battery module of the present application easy to maintain and repair.

[0022] In the battery pack provided by the present application, due to the application of the above-mentioned battery module, the temperature detection of the battery module during the operation of the battery pack is more accurate, making the operation of the battery pack safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Through the following detailed description with reference to the drawings, the above and other objects, features and advantages of the embodiments of the present application will become more readily understood. In the drawings, multiple embodiments of the present application will be illustrated by way of example and not limitation, where:

[0024] Figure 1 is a partial structural schematic diagram of the battery module according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram showing the disassembly and separation of the pressing part and the fixing part of the battery module according to an embodiment of the present application;

[0026] Figure 3 is a partial structural schematic diagram of the battery module according to an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the fixing part of the battery module according to an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the pressing part of the battery module according to an embodiment of the present application;

[0029] Figure 6 is a partial cross-sectional view of the battery module according to an embodiment of the present application;

[0030] Figure 7 is a partial exploded view of the battery module according to an embodiment of the present application.

[0031] Reference Numerals:

[0032] 100 - battery cell assembly, 110 - battery cell;

[0033] 200 - temperature detection component, 210 - temperature sensor, 220 - first strengthening part, 230 - second strengthening part, 240 - flexible connection part;

[0034] 300 - fixing component, 310 - fixing part, 311 - avoidance groove, 312 - supporting protrusion, 313 - clamping protrusion, 320 - pressing part, 321 - clamping hole;

[0035] 400 - tab;

[0036] 500 - adhesive layer;

[0037] 600 - buffer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0041] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0043] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0044] The battery module is a modular structural component stacked by multiple battery cells. During the charging and discharging process, the battery cells will release a certain amount of heat. To ensure the safety and reliability of the operation of the battery module, it is necessary to monitor the temperature of the battery module and perform corresponding processing when the temperature of the battery module is too high. The temperature monitoring of the battery module can be achieved by setting temperature sensors on some of the battery cells.

[0045] Currently, the connection between the temperature sensor and the battery cell can be realized by bonding with a thermally conductive adhesive layer. However, in the case of long-term use of the battery module, the adhesive between the temperature sensor and the battery cell may age, resulting in insufficient connection and contact between the temperature sensor and the battery cell, and further causing the temperature sensor to be unable to accurately monitor the temperature of the battery cell.

[0046] In the battery module provided by this application, the temperature detection member 200 is connected and in contact with the battery cell assembly 100, so that the temperature detection member 200 can collect the temperature of the battery cell assembly 100. The fixing part 310 in the fixing assembly 300 is connected to the battery cell assembly 100, so that the fixing part 310 and the battery cell assembly 100 can be relatively fixed. The pressing part 320 is detachably connected to the fixing part 310. When the pressing part 320 is connected to the fixing part 310, the pressing part 320 can be relatively fixed to the battery cell assembly 100 through the fixing part 310. The temperature detection member 200 is clamped between the pressing part 320 and the battery cell assembly 100, which can make the pressing part 320 press the temperature detection member 200 towards the battery cell assembly 100, so that the interaction force between the temperature detection member 200 and the battery cell assembly 100 is greater, and the temperature detection member 200 is in more sufficient and tight contact with the battery cell assembly 100. In this way, the separation of the temperature detection member 200 and the battery cell assembly 100 can be prevented, thereby ensuring the accuracy and stability of temperature sampling. The pressing part 320 can also be detachably separated from the fixing part 310, so that the pressing part 320 no longer presses on the temperature detection member 200, making the disassembly and assembly of the temperature detection member 200 more convenient, thus making the replacement and repair of the temperature detection member 200 convenient, and ultimately making the maintenance and repair of the battery module of this application convenient.

[0047] In the battery pack proposed in this application, due to the application of the above battery module, the temperature detection of the battery module during the operation of the battery pack is more accurate, making the operation of the battery pack safer.

[0048] The following will describe in detail the battery module and battery pack provided in this application with reference to specific embodiments.

[0049] An embodiment of this application proposes a battery module. Refer to Figure 1 As shown, it includes a housing (not shown in the figure), a battery cell assembly 100, a temperature detection component 200, and a fixing component 300. This battery module can be applied to a battery pack. Specifically, it can be applied to an automobile or an energy storage device.

[0050] For the convenience of describing the specific structure of the battery module, the orientation of the battery module can be defined. Among them, when the battery module is placed on a horizontal plane, the battery module has a length direction, a width direction, and a height direction. Among them, the length direction of the battery module is the Figure 1 X direction in Figure 1 The width direction of the battery module is the Figure 1 Y direction in

[0051] The height direction of the battery module is the

[0052] Among them, the housing is the basic component of the battery module of this application. The housing can provide an installation basis for at least some other components of the battery module and serve the purpose of protecting at least some other components. The housing can be prepared from a metal material, so that the housing has better structural strength, thereby making the durability and reliability of the housing better. In addition, using a metal material for the housing can also enable the heat generated during the charge and discharge process of the battery module to be effectively dissipated through the housing.

[0053] Refer to Figure 1 And Figure 2As shown, the fixing component 300 includes a fixing part 310 and a pressing part 320. Among them, the fixing part 310 is connected to the battery cell component 100, so that the fixing part 310 is fixed to the battery cell component 100. Specifically, the fixing part 310 can be arranged on one side of the top of the battery cell component 100, so that the direction from the battery cell component 100 to the fixing part 310 is the height direction of the battery module. The pressing part 320 is detachably connected to the fixing part 310, so that the pressing part 320 can be switched between a state of being fixedly connected to the fixing part 310 and a state of being separated from the fixing part 310. When the pressing part 320 is connected to the fixing part 310, the pressing part 320 can be pressed on the side of the temperature detection part 200 facing away from the battery cell 110. In this way, the pressing part 320 can act on the temperature detection part 200 towards the temperature detection part 200, so that the temperature detection part 200 is clamped between the pressing part 320 and the battery cell component 100. Thus, the pressing part 320 can press the temperature detection part 200 on the battery cell component 100 in the height direction, preventing the temperature detection part 200 from detaching from the battery cell component 100. Thereby, the temperature detection part 200 can be closely attached to the surface of the battery cell component 100, and the temperature detection part 200 can accurately detect the temperature of the battery cell component 100.

[0054] The pressing part 320 can also be detachably separated from the fixing part 310, which facilitates the replacement or repair of the temperature detection part 200, making the maintenance and repair process of the battery module of the present application convenient and with lower costs.

[0055] In addition, it should also be understood that the temperature detection part 200 in the present application can also be electrically connected to the battery management system, so that the temperature of the battery cell component 100 detected by the temperature detection part 200 can be transmitted to the battery management system. The battery management system controls the temperature of the battery module according to the temperature detected by the temperature detection part 200, enabling the battery module to operate within a safe temperature range and improving the safety and reliability of the battery module.

[0056] In some embodiments, refer to Figures 2 to 3As shown in the figure, the battery cell assembly 100 in the present application may include a plurality of battery cells 110. The plurality of battery cells 110 may be connected in series. Each battery cell 110 can provide electrical energy, so that the electrical energy that the battery module of the present application can provide is more sufficient. The plurality of battery cells 110 may be arranged along the length direction and / or the width direction of the battery module, so that the plurality of battery cells 110 are arranged in an orderly manner and conveniently, so that the plurality of battery cells 110 can make full use of the space inside the housing. Specifically, the thickness direction of the battery cell 110 may be set to be the same as the length direction of the battery module. The plurality of battery cells 110 may be stacked along the thickness direction of the battery cell 110, and a heat insulation pad may be provided between adjacent battery cells 110 to reduce the heat conduction effect between adjacent battery cells 110. The plurality of battery cells 110 stacked along the length direction of the battery module may form a battery cell group. The number of battery cell groups may also be set to be multiple. The multiple battery cell groups may be arranged along the width direction of the battery module, so that the plurality of battery cells 110 are arranged both along the length direction of the battery module and along the width direction of the battery module. The temperature detection member 200 is connected to and in contact with at least some of the plurality of battery cells 110 to collect the actual temperature of the battery cells 110.

[0057] In order to electrically connect the plurality of battery cells 110, the battery cell assembly 100 of the present application may further be provided with a tab 400. The tab 400 may be electrically connected to the plurality of battery cells 110, so that the plurality of battery cells 110 can be electrically connected to each other through the tab 400 in series. The number of tabs 400 may be set to be multiple. Adjacent battery cells 110 may be electrically connected through the tab 400. Thus, the plurality of battery cells 110 can be electrically connected to each other through the plurality of tabs 400. Specifically, the tab 400 may be welded to the terminal post of the battery cell 110, so that the connection between the tab 400 and the battery cell 110 is stable and reliable.

[0058] The fixing portion 310 may be connected to the tab 400. In this way, the fixing portion 310 can be fixedly connected to the battery cell assembly 100 through the tab 400, so that the connection effect between the fixing portion 310 and the battery cell assembly 100 is also stable and reliable. In this way, when the pressing portion 320 is connected to the fixing portion 310, it can also maintain a relatively stable connection relationship with the battery cell assembly 100, so that the pressing portion 320 can fully press the temperature detection member 200. It should be noted that since the tab 400 can electrically connect adjacent battery cells 110, the material of the tab 400 is a metal conductive material. Correspondingly, the fixing portion 310 may be prepared from an insulating material to avoid short circuit between the temperature detection member 200 and the battery cell assembly 100.

[0059] Specifically, the fixing part 310 can be arranged in the gap space between adjacent tab pieces 400, and the fixing part 310 is connected to both adjacent tab pieces 400. This can make the structure of the battery module of the present application more compact, and the reliability of the connection between the fixing part 310 and the cell assembly 100 through the tab pieces 400 is better.

[0060] In addition, in other embodiments, the fixing part 310 can also be arranged to be connected to other components of the cell assembly 100 so that the fixing part 310 and the cell assembly 100 are relatively fixed. Specifically, the fixing part 310 can be fixedly connected to the upper cover of the single cell 110.

[0061] In some embodiments, referring to Figure 2 As shown, in order to enable the fixing part 310 of the present application to be fixedly connected to the tab piece 400, the fixing part 310 and the tab piece 400 can be connected by a thermal riveting connection method. Specifically, the fixing part 310 can be made of a polymer material part, such as a plastic part, and the fixing part 310 and the tab piece 400 can be fixed by a thermal riveting connection method, which can make the process of fixedly connecting the fixing part 310 and the tab piece 400 relatively simpler and more convenient, and at the same time, the fixing part 310 and the tab piece 400 can be separated and disassembled conveniently.

[0062] In addition, in other embodiments, the fixing part 310 and the tab piece 400 can also be connected by bolts. Specifically, corresponding screw holes can be opened on the fixing part 310 and the tab piece 400, and bolts can be screwed into the corresponding screw holes of the fixing part 310 and the tab piece 400 to fix the fixing part 310 and the tab piece 400.

[0063] In some embodiments, referring to Figure 2 and Figure 4 As shown, in order to make the structure of the fixing component 300 of the present application relatively more compact, an avoidance groove 311 can be opened on the fixing part 310. The avoidance groove 311 is a through groove structure that penetrates the fixing part 310 along the thickness direction of the fixing part 310. There is an installation position on the cell assembly 100, and the temperature detection part 200 is arranged at the installation position. The avoidance groove 311 of the fixing part 310 is opposite to at least part of the installation position, and at least part of the pressing part 320 is located in the avoidance groove 311. In this way, the pressing part 320 can pass through the avoidance groove 311 to be opposite to the temperature detection part 200, so that the pressing part 320 can be pressed on the temperature detection part 200. It should be understood that the avoidance groove 311 is located inside the fixing part 310. By arranging the pressing part 320 in the avoidance groove 311 of the fixing part 310, at least part of the pressing part 320 can be located inside the fixing part 310, so that the pressing part 320 makes full use of the internal space of the fixing part 310, and further makes the structure of the fixing component 300 relatively more compact.

[0064] Moreover, the formation of the avoidance groove 311 and the detachable installation between the fixing portion 310 and the pressing portion 320 can effectively avoid the installation of the temperature detection member 200. Specifically, when installing the temperature detection member 200, the pressing portion 320 can be first separated from the fixing portion 310 to open the avoidance groove 311 and expose the installation position. Then, the temperature detection member 200 can be passed through the avoidance groove 311 and installed on the installation position. Finally, the pressing portion 320 is installed on the fixing portion 310 to press the temperature detection member 200.

[0065] The groove size of the avoidance groove 311 of the fixing portion 310 can be set to cooperate with the pressing portion 320, so that the pressing portion 320 can be embedded in the avoidance groove 311, and part of the side wall of the pressing portion 320 can contact the inner wall of the avoidance groove 311. Thus, the avoidance groove 311 can also serve the purpose of limiting the pressing portion 320, making the structure of the pressing portion 320 more stable when it is located in the avoidance groove 311, so that the pressing portion 320 can better press the temperature detection member 200. When connecting the pressing portion 320 and the fixing portion 310, the pressing portion 320 can be first embedded in the avoidance groove 311 of the fixing portion 310, and then the pressing portion 320 and the fixing portion 310 are fixedly connected. In this way, the avoidance groove 311 of the fixing portion 310 can also serve the purpose of pre-fixing the pressing portion 320, making the process of fixedly connecting the pressing portion 320 and the fixing portion 310 simpler and more convenient.

[0066] It should also be understood that when the pressing portion 320 is installed in the avoidance groove 311, the pressing portion 320 can also utilize the space of the fixing portion 310 in its thickness direction, making the size of the fixing assembly 300 in the height direction of the battery module more compact, so that the size of the battery module in its height direction is more compact.

[0067] In addition, in other embodiments, the groove shape and size of the avoidance groove 311 of the fixing portion 310 can also be set to be adapted to the temperature detection member 200, so that at least part of the temperature detection member 200 can be embedded in the avoidance groove 311, and the pressing portion 320 can be arranged on the avoidance groove 311 of the fixing portion 310 and press on the temperature detection member 200. In this way, the inner wall of the avoidance groove 311 can limit the temperature detection member 200 in the length and width directions of the battery module, and the pressing portion 320 can limit the temperature detection member 200 in the height direction of the battery module, so that the temperature detection member 200 can be more reliably in contact connection with the battery cell assembly 100.

[0068] In some embodiments, in order to enable the pressing portion 320 to better fix the temperature detection member 200, the installation position of the battery cell assembly 100 can be set to be directly opposite to the avoidance groove 311 of the fixing portion 310. In this way, the pressing portion 320 can be pressed on the middle portion of the temperature detection member 200, so that the temperature detection member 200 is more evenly stressed by the pressing portion 320, avoiding damage to the temperature detection member 200 due to excessive local stress.

[0069] In some embodiments, referring to Figure 4 As shown, the avoidance groove 311 of the present application can be formed at the edge of the fixing portion 310, so that at least one side edge of the fixing portion 310 has an opening of the avoidance groove 311, so that the pressing portion 320 can be more conveniently installed in the avoidance groove 311. Specifically, the avoidance groove 311 in the present application can be formed at the corner of the fixing portion 310, so that both sides connected to the fixing portion 310 have openings of the avoidance groove 311, which can further facilitate the installation of the pressing portion 320 in the avoidance groove 311 and can more conveniently separate the pressing portion 320 from the fixing portion 310.

[0070] In addition, by providing the avoidance groove 311 at the corner of the fixing portion 310, the process difficulty of forming the avoidance groove 311 on the fixing portion 310 can also be reduced, making the manufacturing process of the fixing assembly 300 simpler, and further reducing the manufacturing process difficulty of the battery module of the present application.

[0071] In some embodiments, referring to Figure 4 As shown, in order to make the connection between the pressing portion 320 and the fixing portion 310 of the present application more stable and reliable, the fixing portion 310 can also be provided with a support protrusion 312. The support protrusion 312 is arranged in the avoidance groove 311 of the fixing portion 310. One end of the support protrusion 312 can be connected to the inner wall of the avoidance groove 311, and the other end of the support protrusion 312 can extend in a direction away from the inner wall of the avoidance groove 311, so that the support protrusion 312 can be fixed in the avoidance groove 311. The support protrusion 312 supports the pressing portion 320, so that the pressing portion 320 is located on the support protrusion 312. In this way, when the pressing portion 320 is installed in the avoidance groove 311 of the fixing portion 310, the support protrusion can fix the pressing portion 320 in the avoidance groove 311.

[0072] The support protrusion 312 can be arranged along the circumferential direction of the avoidance groove 311, so that the support protrusion 312 is connected to the inner walls of various parts in the circumferential direction of the avoidance groove 311, which can increase the contact area between the support protrusion 312 and the pressing portion 320, so that the pressing portion 320 can be more reliably fixed in the avoidance groove 311.

[0073] There is a distance between the support protrusion 312 and the notch on the side of the avoidance groove 311 away from the temperature detection part 200, so that the support protrusion 312 is adjacent to the bottom side of the avoidance groove 311. In this way, when the support protrusion 312 supports the clamping part 320, at least part of the clamping part 320 is located in the avoidance groove 311, which can make the size of the fixing component 300 in the height direction of the battery module more compact.

[0074] In some embodiments, reference Figures 4 to 5 As shown, in order to further reliably connect the pressing portion 320 with the fixing portion 310, the fixing portion 310 and the pressing portion 320 can be connected by a clamping and fixing method. Specifically, the fixing portion 310 also has a clamping protrusion 313. The clamping protrusion 313 is arranged on the supporting protrusion 312 and is located on the side of the supporting protrusion 312 away from the temperature detecting member 200. The pressing portion 320 is provided with a clamping hole 321 adapted to the supporting protrusion 312, and the supporting protrusion 312 is suitable for clamping with the clamping hole 321, so that the supporting protrusion 312 is fixed in the clamping hole 321, so that the pressing portion 320 and the fixing portion 310 can be clamped and limited, preventing the pressing portion 320 from falling off and separating from the fixing portion 310.

[0075] Specifically, the engaging protrusion 313 is a bump structure provided on the supporting protrusion 312. When the pressing portion 320 needs to be installed on the fixing portion 310, the engaging hole 321 of the pressing portion 320 can be aligned with the engaging protrusion 313, and the pressing portion 320 can be pressed toward the fixing portion 310, so that the engaging protrusion 313 engages with the engaging hole 321. The groove size of the engaging hole 321 is adapted to the outer dimensions of the engaging protrusion 313, so that the engaging protrusion 313 can be engaged with the engaging hole 321, so that the engaging protrusion 313 is securely fixed in the engaging hole 321, thereby ensuring a reliable connection between the pressing portion 320 and the fixing portion 310 and a simple and convenient connection process. The clamping protrusion 313 is fixed in the clamping hole 321 by clamping, and the clamping protrusion 313 can be relatively easily removed from the clamping hole 321, so that the disassembly process of the pressing portion 320 and the fixing portion 310 is also simple and convenient.

[0076] The number of the snap-fitting protrusions 313 can also be set to multiple, and the multiple snap-fitting protrusions 313 can be distributed at various positions of the supporting protrusion 312. Accordingly, the number of the snap-fitting holes 321 of the clamping portion 320 corresponds to the number of the snap-fitting protrusions 313, and the multiple snap-fitting protrusions 313 can be correspondingly snapped into the multiple snap-fitting holes 321, so that the fixed connection effect between the clamping portion 320 and the fixing portion 310 is more stable and reliable.

[0077] In addition, in other embodiments, the pressing part 320 can also be fixed to the fixing part 310 by means of bolt connection or the like. Specifically, corresponding screw holes can be provided on the pressing part 320 and the fixing part 310, and the pressing part 320 and the fixing part 310 can be fixed by screwing bolts into the screw holes on the pressing part 320 and the fixing part 310. When it is necessary to disassemble the pressing part 320 from the fixing part 310, the bolts can be disassembled.

[0078] In some embodiments, referring to Figures 6 to 7 As shown, the battery module of the present application can also be provided with an adhesive layer 500. The adhesive layer 500 can be located between the temperature detection member 200 and the battery cell assembly 100. The temperature detection member 200 can be connected and fixed to the battery cell assembly 100 through the adhesive layer 500, thereby further improving the connection reliability between the temperature detection member 200 and the battery cell assembly 100. The adhesive layer 500 includes a thermally conductive adhesive layer, so that the heat of the battery cell assembly 100 can be efficiently conducted to the temperature detection member 200 through the thermally conductive adhesive layer, so that the temperature of the battery cell assembly 100 detected by the temperature detection member 200 is more accurate and the detection error is reduced.

[0079] In some embodiments, referring to Figures 6 to 7 As shown, the temperature detection member 200 of the present application includes a temperature sensor 210, a first reinforcing part 220, a second reinforcing part 230, and a flexible connecting part 240. Among them, the first reinforcing part 220 is provided with a receiving groove, the temperature sensor 210 is located in the receiving groove, the second reinforcing part 230 is located at the bottom of the first reinforcing part 220, the flexible connecting part 240 is located between the first reinforcing part 220 and the second reinforcing part 230, and is clamped by the first reinforcing part 220 and the second reinforcing part 230. The flexible connecting part 240 is electrically connected to the temperature sensor 210. The pressing part 320 can be pressed on the temperature sensor 210 and the first reinforcing part 220, and the second reinforcing part 230 is adhesively fixed to the battery cell assembly 100 through the adhesive layer 500. Thus, the temperature detection member 200 can have a stable and reliable structure, and the temperature detection member 200 is in reliable contact with the battery cell assembly 100.

[0080] The battery module can also be provided with a buffer member 600. The buffer member 600 is located between the pressing part 320 and the temperature sensor 210 and the first reinforcing part 220. The buffer member 600 can prevent the pressing part 320 from directly pressing on the temperature sensor 210 and causing damage to the temperature sensor 210.

[0081] Based on the above battery module, an embodiment of the present application also proposes a battery pack, including the above battery module.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, characterized in that, include: Battery cell components; A temperature detection component is provided on the battery core assembly; The fixing assembly includes a fixing portion and a pressing portion, wherein the fixing portion is connected to the battery cell assembly, and the pressing portion is detachably connected to the fixing portion. When the pressing portion is connected to the fixing portion, the temperature detection component is clamped between the pressing portion and the battery cell assembly.

2. The battery module according to claim 1, wherein, The battery cell assembly includes a tab and a plurality of battery cells, the plurality of battery cells are electrically connected via the tab, the temperature detection element is connected to at least part of the plurality of battery cells, and the fixing portion is connected to the tab.

3. The battery module according to claim 2, wherein The fixing portion is connected to the bar by heat riveting.

4. The battery module according to claim 1, wherein: The fixing portion is provided with an avoidance groove, the battery core assembly has an installation position, the temperature detection component is arranged on the installation position, and at least a portion of the installation position corresponds to the avoidance groove, and at least a portion of the pressing portion is arranged in the avoidance groove.

5. The battery module according to claim 4, characterized in that, The installation position is arranged opposite to the avoidance groove.

6. The battery module according to claim 4, characterized in that, The avoidance groove is formed at an edge of the fixing portion.

7. The battery module according to claim 6, wherein The fixing portion has a supporting protrusion, which is located in the avoidance groove and connected to the inner wall of the avoidance groove. There is a distance between the supporting protrusion and the opening on one side of the avoidance groove away from the temperature detection part, and the supporting protrusion supports the clamping portion.

8. The battery module according to claim 7, characterized in that: The fixing portion is suitable for being clamped and fixed with the pressing portion.

9. The battery module according to claim 8, characterized in that: The fixing portion further has a clamping protrusion, the pressing portion is provided with a clamping hole, the clamping protrusion is arranged on the supporting protrusion, and the clamping protrusion is suitable for clamping with the clamping hole.

10. The battery module according to claim 9, characterized in that, The clamping protrusion is located on a side of the supporting protrusion away from the temperature detecting component.

11. The battery module according to any one of claims 1 to 10, characterized in that: The battery module further includes an adhesive layer, and the temperature detection element is connected to the battery core assembly through the adhesive layer.

12. The battery module according to claim 11, wherein, The adhesive layer includes a thermally conductive adhesive layer.

13. A battery pack, characterized in that, The invention comprises a battery module according to any one of claims 1 to 12.

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