Safety protection device and battery module

Abstract

The utility model provides a safety protection device and a battery module. The safety protection device is used for being arranged on the battery module. The battery module comprises a single battery, an end plate and an output electrode; each single battery is provided with a first surface and a second surface which are perpendicular to each other, and the first surface is provided with a pole assembly; the end plate is arranged on the second surface; the output electrode is provided with a connecting part, a leading-out part and a fusing part, the connecting part is located on the first surface and connected with the pole assembly, the leading-out part and the fusing part extend out of the first surface, and the leading-out part is connected to the connecting part through the fusing part; the safety protection device comprises a leading-out support and a protection cover. The leading-out support is arranged on the end plate; the protective cover is detachably assembled on the leading-out support and forms a protective cavity together with the leading-out support; the output pole partially extends into the protection cavity, and the whole fusing part is located in the protection cavity.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a safety protection device and a battery module. Background Art

[0002] In existing battery module designs, a lead-out support and protective cover are used to secure and insulate the output pole. Furthermore, a short-circuit fuse area is designed on the output pole. This area can be instantly blown when an external short circuit occurs in the battery module, thereby satisfying the fuse mechanism. However, in existing designs, the short-circuit fuse area of ​​the output pole is partially located outside the lead-out support and protective cover. When a short circuit occurs in the portion of the output pole outside the lead-out support and protective cover, the high-temperature slag generated by the instantaneous blowout will splash everywhere, potentially splashing onto adjacent single cells and causing the cell casings to melt through, leaking electrolyte, and further igniting the battery module, resulting in a fire. Utility Model Content

[0003] A main purpose of the present disclosure is to overcome at least one of the above-mentioned defects of the prior art and provide a safety protection device that can prevent the slag generated when the short-circuit fusing area of ​​the output pole is fused from splashing onto the single battery.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, a safety protection device is provided for being arranged in a battery module; the battery module includes a single cell, an end plate and an output pole; the single cell has a first surface and a second surface perpendicular to each other, the first surface is provided with a pole assembly; the end plate is provided on the second surface; the output pole has a connecting portion, a lead-out portion and a fuse portion, the connecting portion is located on the first surface and is connected to the pole assembly, the lead-out portion and the fuse portion extend out of the first surface, and the lead-out portion is connected to the connecting portion via the fuse portion; wherein, the safety protection device includes a lead-out support and a protective cover; the lead-out support is provided on the end plate; the protective cover is detachably assembled on the lead-out support and forms a protective cavity together with the lead-out support; wherein, the output pole partially extends into the protective cavity, and the entire fuse portion is located within the protective cavity.

[0006] According to one embodiment of the present disclosure, the lead-out support includes a baffle, wherein the baffle portion is located between the lead-out portion and the second surface; wherein a flame retardant material layer is provided on a side of the baffle facing away from the single battery cell.

[0007] According to one embodiment of the present disclosure, the protective cover has a third surface facing away from the lead-out support, and the third surface is an inclined surface. In the direction from one end close to the single cell to one end away from the single cell, the inclined surface is arranged obliquely close to the lead-out support.

[0008] According to one embodiment of the present disclosure, the lead-out support is provided with a first heat dissipation hole, and the first heat dissipation hole is connected to the protection cavity.

[0009] According to one embodiment of the present disclosure, wherein: the lead-out support has a fourth surface perpendicular to the first surface and perpendicular to the second surface, and the first heat dissipation hole is arranged on the fourth surface; and / or, the first heat dissipation hole is a waist-shaped hole; and / or, the lead-out support is provided with at least two first heat dissipation holes.

[0010] According to one embodiment of the present disclosure, the protective cover is provided with a second heat dissipation hole, and the second heat dissipation hole is connected to the protective cavity.

[0011] According to one embodiment of the present disclosure, the protective cover has a fifth surface perpendicular to the first surface and the second surface, and the second heat dissipation hole is arranged on the fifth surface; and / or the second heat dissipation hole is a waist-shaped hole; and / or the protective cover is provided with at least two second heat dissipation holes.

[0012] According to one embodiment of the present disclosure, the lead-out support and the protective cover are assembled via a snap-fit ​​structure; the snap-fit ​​structure includes a snap-fitting slot and a snap-fitting clip that snap-fit ​​with each other, the snap-fitting slot is provided on one of the lead-out support and the protective cover, and the snap-fitting clip is provided on the other of the lead-out support and the protective cover.

[0013] According to one embodiment of the present disclosure, one of the lead-out support and the protective cover is provided with a guide groove, the card slot is provided at the bottom of the guide groove, and the partial structure of the other of the lead-out support and the protective cover provided with the clip can slide along the guide groove to provide a guiding function when the clip is assembled with the clip.

[0014] From the above technical solutions, it can be seen that the advantages and positive effects of the safety protection device proposed in this disclosure are:

[0015] The safety protection device proposed in the present disclosure is used to be arranged in a battery module; the battery module includes a single cell, an end plate and an output pole; the single cell has a first and a second surface perpendicular to each other, and the first surface is provided with a pole assembly; the end plate is arranged on the second surface; the output pole has a connecting part, a lead-out part and a fuse part, the connecting part is located on the first surface and is connected to the pole assembly, the lead-out part and the fuse part extend out of the first surface, and the lead-out part is connected to the connecting part via the fuse part; the safety protection device includes a lead-out support and a protective cover; the lead-out support is arranged on the end plate; the protective cover is detachably assembled on the lead-out support and forms a protective cavity together with the lead-out support; the output pole partially extends into the protective cavity, and the entire fuse part is located in the protective cavity. Through the above-mentioned structural design, the present invention arranges the entire fuse part of the output pole in the protective cavity formed by the lead-out support and the protective cover, thereby achieving complete encirclement of the fuse part by the safety protection device, so that the high-temperature slag generated when the fuse part melts is confined in the protective cavity, preventing the slag from splashing onto adjacent single cells and causing the single cell shell to be melted through and the electrolyte to leak, thereby avoiding the battery module from catching fire due to the splashing of slag.

[0016] Another main purpose of the present disclosure is to overcome at least one of the above-mentioned defects of the prior art and provide a battery module using the above-mentioned safety protection device.

[0017] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0018] According to another aspect of the present disclosure, a battery module is provided, which includes the safety protection device proposed in the present disclosure and described in the above embodiments.

[0019] From the above technical solutions, it can be seen that the advantages and positive effects of the battery module proposed in this disclosure are:

[0020] The battery module proposed in the present disclosure can avoid fire caused by slag splashing by adopting the safety protection device proposed in the present disclosure, which is beneficial to improving the safety and reliability of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The various objects, features, and advantages of the present disclosure will become more apparent upon consideration of the following detailed description of preferred embodiments of the present disclosure in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present disclosure and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout.

[0022] Figure 1 and Figure 2 They are schematic diagrams of the three-dimensional structure of a safety protection device at two different viewing angles according to an exemplary embodiment;

[0023] Figure 3 yes Figure 1A schematic diagram of the three-dimensional structure of the installation protection device when it is installed on the battery module;

[0024] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure of some structures in;

[0025] Figure 5 and Figure 6 They are Figure 4 Two different three-dimensional decomposition diagrams;

[0026] Figure 7 yes Figure 4 Side view of;

[0027] Figure 8 yes Figure 7 Schematic diagram of the plane decomposition.

[0028] The following are the descriptions of the reference numerals:

[0029] 100. Safety protection devices;

[0030] 101. First opening;

[0031] 102. Second opening;

[0032] 110. Lead out support;

[0033] 1101. Page 4;

[0034] 111. Baffle;

[0035] 112. Flame retardant material layer;

[0036] 113. First heat dissipation hole;

[0037] 114. Card slot;

[0038] 115. Guide groove;

[0039] 120. Protective cover;

[0040] 1201. Page 3;

[0041] 1202. Page 5;

[0042] 121. Second heat dissipation hole;

[0043] 122. Buckle;

[0044] 200. Single cell;

[0045] 201. Page 1;

[0046] 202. Second side;

[0047] 210. Pole assembly;

[0048] 300. End plate;

[0049] 400. Output pole;

[0050] 410. Connecting part;

[0051] 420. Lead-out section;

[0052] 430. Fuse unit. DETAILED DESCRIPTION

[0053] Typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various variations in different embodiments without departing from the scope of the present disclosure, and the description and drawings therein are essentially for illustrative purposes rather than for limiting the present disclosure.

[0054] In the following description of different exemplary embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part of this disclosure and in which are shown by way of example different exemplary structures, systems and steps that may implement aspects of the present disclosure. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps may be used, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein for convenience only, for example, according to the directions of the examples depicted in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of a structure to fall within the scope of the present disclosure.

[0055] See Figure 1 and Figure 2 , which respectively and representatively show schematic diagrams of the three-dimensional structure of the safety protection device 100 proposed in the present disclosure at two different viewing angles. In this exemplary embodiment, the safety protection device 100 proposed in the present disclosure is described by taking the application to a battery module using square-shell batteries as an example. It is easy for those skilled in the art to understand that in order to apply the relevant designs of the present disclosure to other types of battery modules or other energy storage devices, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principles of the safety protection device 100 proposed in the present disclosure.

[0056] For reference Figures 3 to 8 , Figure 3 1 is a representative diagram showing a three-dimensional structure of a protective device installed on a battery module, specifically showing a combined structure of a single battery 200, an end plate 300, an output pole 400 and a safety protection device 100; Figure 4Representatively shown in Figure 3 Schematic diagram of the three-dimensional structure of some structures in; Figure 5 and Figure 6 The representative Figure 4 Two different three-dimensional decomposition diagrams, Figure 5 The structure when the protective cover 120 is separated from the lead-out support 110 is specifically shown in FIG. Figure 6 Detailed description is given of the structure when the protective cover 120 and the output pole 400 are separated from the lead support 110; Figure 7 Representatively shown in Figure 4 Side view of; Figure 8 Representatively shown in Figure 7 The following will describe in detail the structure, connection mode and functional relationship of the main components of the safety protection device 100 proposed in the present disclosure in combination with the above-mentioned drawings.

[0057] like Figures 1 to 8 As shown, in one embodiment of the present disclosure, the safety protection device 100 proposed in the present disclosure is used to be set in a battery module. The battery module includes a single battery 200, an end plate 300 and an output pole 400. The single battery 200 has a first surface 201 and a second surface 202 that are perpendicular to each other. The first surface 201 is provided with a pole assembly 210. The end plate 300 is provided on the second surface 202. The output pole 400 has a connecting portion 410, a lead portion 420 and a fuse portion 430. The connecting portion 410 is located on the first surface 201 and is connected to the pole assembly 210. The lead portion 420 and the fuse portion 430 extend outside the first surface 201, and the lead portion 420 is connected to the connecting portion 410 via the fuse portion 430. On this basis, the safety protection device 100 proposed in the present disclosure includes a lead support 110 and a protective cover 120. The lead support 110 is provided on the end plate 300. The protective cover 120 is detachably mounted on the lead-out support 110, and the protective cover 120 and the lead-out support 110 together form a protective cavity. The output pole 400 partially extends into the protective cavity, and the entire fuse 430 is located within the protective cavity. Through the above-mentioned structural design, the present disclosure arranges the entire fuse 430 of the output pole 400 within the protective cavity formed by the lead-out support 110 and the protective cover 120, thereby achieving complete encirclement of the fuse 430 by the safety protection device 100, so that the high-temperature slag generated when the fuse 430 melts is confined within the protective cavity, preventing the slag from splashing onto the adjacent single battery 200 and causing the shell of the single battery 200 to be melted through and the electrolyte to leak, thereby preventing the battery module from catching fire due to the splashing of slag.

[0058] It should be noted that the so-called "completely surrounded" in the above content means that the entire fuse part 430 is located within the scope of the protection cavity of the safety protection device 100, but it does not limit whether the protection cavity is a completely closed cavity structure. Figure 1 and Figure 2 In the illustrated embodiment, the safety protection device 100 is provided with a first opening 101 and a second opening 102, the first opening 101 and the second opening 102 being connected to the protection cavity respectively. The first opening 101 is located on the side of the safety protection device 100 facing the single battery 200, and the first opening 101 is used for the output pole 400 to pass through and extend into the protection cavity. The second opening 102 is located on the side of the safety protection device 100 facing away from the single battery 200, and the second opening 102 is used for connecting other connection structures to the lead-out portion 420. In addition, Figure 1 and Figure 2 In the illustrated embodiment, the entire lead-out portion 420 is located within the protective cavity. Therefore, other connecting structures may extend through the second opening 102 into the protective cavity to connect to the lead-out portion 420, thereby further preventing slag from splashing out of the protective cavity. In other embodiments, the lead-out portion 420 may be partially located within the protective cavity and partially extended from the second opening 102, or the lead-out portion 420 may be entirely extended from the second opening 102, without limitation to this embodiment.

[0059] like Figure 1 、 Figure 2 and Figure 6 As shown, in one embodiment of the present disclosure, the lead support 110 may include a baffle 111, which is partially located between the lead portion 420 and the second surface 202 of the single cell 200. Furthermore, a flame-retardant material layer 112 may be provided on the side of the baffle 111 facing away from the single cell 200 (e.g., the side of the cavity wall where the baffle 111 participates in forming the protective cavity). Through the above-described structural design, the present disclosure can utilize the flame-retardant material layer 112 to prevent the high-temperature slag generated when the output pole 400 melts from melting through the baffle 111 and damaging the single cell 200, further preventing the slag from spreading toward the single cell 200.

[0060] Based on the structural design that a flame retardant material layer 112 is provided on the side of the baffle 111 of the lead-out support 110 facing away from the single battery 200 , in one embodiment of the present disclosure, the flame retardant material layer 112 may be a high-temperature resistant flame retardant patch.

[0061] like Figures 1 to 4As shown, in one embodiment of the present disclosure, the protective cover 120 has a third surface 1201 facing away from the lead-out support 110. The third surface 1201 can be an inclined surface. Specifically, in the direction from the end close to the single cell 200 to the end away from the single cell 200, the inclined surface is arranged obliquely close to the lead-out support 110. Through the above structural design, considering the possible splashing direction of the high-temperature slag generated after the output electrode 400 is melted (for example, Figure 8 The present invention adopts a sloped design for the third surface 1201 of the protective cover 120, which can bounce the high-temperature slag splashed onto the protective cover 120 outward, thereby reducing the accumulation of high-temperature slag in the lead-out support 110.

[0062] like Figure 1 and Figure 2 As shown, in one embodiment of the present disclosure, the lead-out support 110 can be provided with a first heat dissipation hole 113, which is connected to the protective cavity. Through the above structural design, the present disclosure can utilize the first heat dissipation hole 113 to meet the heat dissipation requirements of the output electrode 400 during high-rate discharge of the battery module.

[0063] like Figure 1 and Figure 2 As shown, based on the structural design of the lead support 110 provided with the first heat dissipation hole 113, in one embodiment of the present disclosure, the lead support 110 has a fourth surface 1101 perpendicular to the first surface 201 and perpendicular to the second surface 202, and the first heat dissipation hole 113 can be provided on the fourth surface 1101. In other words, when the output pole 400 partially extends into the protective cavity, the first heat dissipation hole 113 is located on the side of the output pole 400.

[0064] like Figure 1 and Figure 2 As shown, based on the structural design of the lead-out support 110 provided with the first heat dissipation hole 113, in one embodiment of the present disclosure, the first heat dissipation hole 113 can be a waist-shaped hole. For example, the long axis of the waist-shaped hole can be perpendicular to the second surface 202. Through the above structural design, the present disclosure uses a waist-shaped hole as the first heat dissipation hole 113, which can achieve the heat dissipation function while further reducing the possibility of high-temperature slag splashing out of the protective cavity through the first heat dissipation hole 113.

[0065] like Figure 1 and Figure 2As shown, based on the structural design of the lead-out support 110 being provided with first heat dissipation holes 113, in one embodiment of the present disclosure, the lead-out support 110 can be provided with at least two first heat dissipation holes 113. In addition, when both fourth surfaces 1101 of the lead-out support 110 are provided with first heat dissipation holes 113, the number of first heat dissipation holes 113 respectively provided on the two fourth surfaces 1101 can be equal, and the positions can correspond. Through the above structural design, the present disclosure can enhance the heat dissipation effect of the first heat dissipation holes 113, for example, by utilizing the oppositely arranged first heat dissipation holes 113 (for example, respectively arranged on two opposite fourth surfaces 1101) to achieve convection and enhance the heat dissipation effect.

[0066] like Figure 1 and Figure 2 As shown, in one embodiment of the present disclosure, the protective cover 120 can be provided with a second heat dissipation hole 121, which is connected to the protective cavity. Through the above structural design, the present disclosure can utilize the second heat dissipation hole 121 to meet the heat dissipation requirements of the output electrode 400 during high-rate discharge of the battery module.

[0067] like Figure 1 and Figure 2 As shown, based on the structural design of the protective cover 120 provided with the second heat dissipation hole 121, in one embodiment of the present disclosure, the protective cover 120 has a fifth surface 1205 perpendicular to the first surface 201 and the second surface 202, and the second heat dissipation hole 121 can be provided on the fifth surface 1205. In other words, when the output pole 400 partially extends into the protective cavity, the second heat dissipation hole 121 is located on the side of the output pole 400.

[0068] like Figure 1 and Figure 2 As shown, based on the structural design of the protective cover 120 provided with the second heat dissipation hole 121, in one embodiment of the present disclosure, the second heat dissipation hole 121 can be a waist-shaped hole. For example, the long axis of the waist-shaped hole can be perpendicular to the second surface 202. Through the above structural design, the present disclosure uses the waist-shaped second heat dissipation hole 121, which can achieve the heat dissipation function while further reducing the possibility of high-temperature slag splashing out of the protective cavity through the second heat dissipation hole 121.

[0069] like Figure 1 and Figure 2As shown, based on the structural design of the protective cover 120 being provided with second heat dissipation holes 121, in one embodiment of the present disclosure, the protective cover 120 can be provided with at least two second heat dissipation holes 121. In addition, when both fifth surfaces 1205 of the protective cover 120 are provided with second heat dissipation holes 121, the number of second heat dissipation holes 121 respectively provided on the two fifth surfaces 1205 can be equal, and the positions can correspond. Through the above structural design, the present disclosure can improve the heat dissipation effect of the second heat dissipation holes 121, for example, by utilizing the oppositely arranged second heat dissipation holes 121 (for example, respectively arranged on two opposite fourth surfaces 1101) to achieve convection and improve the heat dissipation effect.

[0070] like Figure 1 、 Figure 2 、 Figures 4 to 8 As shown, in one embodiment of the present disclosure, the lead-out support 110 and the protective cover 120 can be assembled via a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​slot 114 and a buckle 122 that snap-fit ​​with each other. The snap-fit ​​slot 114 can be provided on the lead-out support 110, and the snap-fit ​​slot 114 can be specifically a through slot or a through hole as shown in the accompanying drawings, or a groove structure can be adopted. The buckle 122 can be provided on the protective cover 120. Through the above-mentioned structural design, the present disclosure can facilitate the loading and unloading of the protective cover 120 and the lead-out support 110, and the snap-fit ​​slot 114 is conducive to improving the structural strength. In some embodiments, the snap-fit ​​slot 114 can also be provided on the protective cover 120, and the buckle 122 can also be provided on the lead-out support 110. In other words, in various possible embodiments consistent with the design concept of the present disclosure, the snap-fit ​​structure may include a snap-fitting slot 114 and a snap-fitting buckle 122 that snap-fit ​​into each other, the snap-fitting slot 114 being arranged on one of the lead-out support 110 and the protective cover 120, and the snap-fitting buckle 122 being arranged on the other of the lead-out support 110 and the protective cover 120.

[0071] like Figure 1 、 Figure 2 、 Figures 4 to 8 As shown, based on the structural design that the lead support 110 and the protective cover 120 are assembled via a snap-fit ​​structure, and the snap-fit ​​structure includes a snap-fit ​​groove 114 and a snap-fit ​​buckle 122, in one embodiment of the present disclosure, the lead support 110 and the protective cover 120 can be assembled via at least two sets of snap-fit ​​structures, with the two sets of snap-fit ​​structures located on either side of the safety protection device 100. For example, the two snap-fit ​​grooves 114 are located on the two fourth surfaces 1101 of the lead support 110, and the two snap-fit ​​buckles 122 are located on the two fifth surfaces 1205 of the protective cover 120. Through the above structural design, the present disclosure can further optimize the assembly strength of the lead support 110 and the protective cover 120 via the snap-fit ​​structure.

[0072] like Figure 5 and Figure 6As shown, based on the structural design that the lead support 110 and the protective cover 120 are assembled via a snap-fit ​​structure and the snap-fit ​​structure includes a snap slot 114 and a buckle 122, in one embodiment of the present disclosure, the lead support 110 (i.e., the one of the lead support 110 and the protective cover 120 provided with the snap slot 114) can be provided with a guide slot 115, the snap slot 114 is provided at the bottom of the guide slot 115, and the portion of the protective cover 120 (i.e., the one of the lead support 110 and the protective cover 120 provided with the buckle 122) provided with the buckle 122 can slide along the guide slot 115 to provide a guiding function when the buckle 122 is assembled with the snap slot 114. Through the above structural design, the present disclosure can make the assembly of the protective cover 120 and the lead support 110 more convenient.

[0073] It should be noted that the safety guard device 100 shown in the drawings and described in this specification is only a few examples of the many types of safety guard devices 100 that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are in no way limited to any details or any components of the safety guard device 100 shown in the drawings or described in this specification.

[0074] In summary, the safety protection device 100 proposed in the present disclosure is used to be set in a battery module; the battery module includes a single battery 200, an end plate 300 and an output pole 400; the single battery 200 has a first surface 201 and a second surface 202 perpendicular to each other, and the first surface 201 is provided with a pole assembly 210; the end plate 300 is provided on the second surface 202; the output pole 400 has a connecting portion 410, a lead portion 420 and a fuse portion 430, and the connecting portion 410 is located on the first surface 201 and is connected to the pole assembly 210 is connected, the lead-out portion 420 and the fuse portion 430 extend out of the first surface 201, and the lead-out portion 420 is connected to the connecting portion 410 via the fuse portion 430; the safety protection device 100 includes a lead-out support 110 and a protective cover 120; the lead-out support 110 is arranged on the end plate 300; the protective cover 120 is detachably assembled on the lead-out support 110, and forms a protective cavity together with the lead-out support 110; the output pole 400 partially extends into the protective cavity, and the entire fuse portion 430 is located in the protective cavity. Through the above-mentioned structural design, the present invention arranges the entire fuse part 430 of the output pole 400 in the protective cavity formed by the lead-out support 110 and the protective cover 120, thereby achieving complete encirclement of the fuse part 430 by the safety protection device 100, so that the high-temperature slag generated when the fuse part 430 melts is confined in the protective cavity, preventing the slag from splashing onto the adjacent single battery cell 200 and causing the single battery cell 200 shell to be melted through and the electrolyte to leak, thereby preventing the battery module from catching fire due to the splashing of slag.

[0075] Based on the above detailed description of several exemplary embodiments of the safety protection device 100 proposed in the present disclosure, an exemplary embodiment of the battery module proposed in the present disclosure will be described below.

[0076] Cooperation and participation Figure 3 In one embodiment of the present disclosure, the battery module proposed in the present disclosure includes a single battery 200, an end plate 300, an output pole 400, and a safety protection device 100 proposed in the present disclosure and described in detail in the above embodiment. Specifically, the single battery 200 has a first surface 201 and a second surface 202 that are perpendicular to each other, and the first surface 201 is provided with a pole assembly 210. The end plate 300 is provided on the second surface 202. The output pole 400 has a connecting portion 410, a lead portion 420 and a fuse portion 430. The connecting portion 410 is located on the first surface 201 and is connected to the pole assembly 210. The lead portion 420 and the fuse portion 430 extend outside the first surface 201, and the lead portion 420 is connected to the connecting portion 410 via the fuse portion 430. The lead support 110 of the safety protection device 100 is provided on the end plate 300. The protective cover 120 of the safety protection device 100 is detachably mounted on the lead support 110, and the protective cover 120 and the lead support 110 together form a protective cavity. The output pole 400 partially extends into the protective cavity, and the fuse 430 is entirely located in the protective cavity.

[0077] It should be noted that the battery modules shown in the drawings and described in this specification are only a few examples of the many types of battery modules that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are in no way limited to any detail or any component of the battery modules shown in the drawings or described in this specification.

[0078] In summary, the battery module proposed in the present disclosure can avoid fire caused by slag splashing by adopting the safety protection device 100 proposed in the present disclosure, which is beneficial to improving the safety and reliability of the battery module.

[0079] The above describes and / or illustrates in detail the exemplary embodiments of the safety protection device and battery module proposed in the present disclosure. However, the embodiments of the present disclosure are not limited to the specific embodiments described here. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described here. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated here, the terms "one", "an" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to express an open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical limitations on their objects.

[0080] Although the safety protection device and battery module proposed in the present disclosure have been described according to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of the present disclosure within the spirit and scope of the claims.

Claims

1. A safety protection device, for being installed in a battery module; the battery module includes a single battery, an end plate, and an output pole; the single battery has a first surface and a second surface perpendicular to each other, the first surface is provided with a pole assembly; the end plate is provided on the second surface; the output pole has a connecting portion, an extraction portion, and a fuse portion, the connecting portion is located on the first surface and connected to the pole assembly, the extraction portion and the fuse portion extend outside the first surface, and the extraction portion is connected to the connecting portion via the fuse portion; characterized in that The safety protection device includes a lead-out support and a protective cover; the lead-out support is arranged on the end plate; the protective cover is detachably assembled on the lead-out support and forms a protective cavity together with the lead-out support; wherein the output pole portion extends into the protective cavity, and the entire fuse part is located in the protective cavity.

2. The safety protection device according to claim 1, characterized in that: The lead-out support includes a baffle, and a portion of the baffle is located between the lead-out portion and the second surface; wherein a flame retardant material layer is provided on a side of the baffle facing away from the single battery.

3. The safety protection device according to claim 1, characterized in that: The protection cover has a third surface facing away from the lead-out support. The third surface is an inclined surface. In a direction from an end close to the single battery to an end away from the single battery, the inclined surface is arranged obliquely close to the lead-out support.

4. The safety protection device according to claim 1, characterized in that: The lead-out support is provided with a first heat dissipation hole, and the first heat dissipation hole is connected to the protection cavity.

5. The safety protection device according to claim 4, characterized in that: The lead-out support has a fourth surface perpendicular to the first surface and the second surface, and the first heat dissipation hole is provided on the fourth surface; and / or The first heat dissipation hole is a waist-shaped hole; and / or The lead-out support is provided with at least two first heat dissipation holes.

6. The safety protection device according to claim 1, characterized in that: The protection cover is provided with a second heat dissipation hole, and the second heat dissipation hole is communicated with the protection cavity.

7. The safety protection device according to claim 6, characterized in that: The protective cover has a fifth surface perpendicular to the first surface and the second surface, and the second heat dissipation hole is provided on the fifth surface; and / or The second heat dissipation hole is a waist-shaped hole; and / or The protection cover is provided with at least two second heat dissipation holes.

8. The safety protection device according to claim 1, characterized in that: The lead-out support and the protective cover are assembled via a snap-fit ​​structure; the snap-fit ​​structure includes a snap-fitting slot and a snap-fitting clip that are snap-fitted to each other, the snap-fitting slot is arranged on one of the lead-out support and the protective cover, and the snap-fitting clip is arranged on the other of the lead-out support and the protective cover.

9. The safety protection device according to claim 8, characterized in that: One of the lead-out support and the protective cover is provided with a guide groove, the card slot is provided at the bottom of the guide groove, and the partial structure of the other one of the lead-out support and the protective cover provided with the buckle can slide along the guide groove to provide a guiding function when the buckle is assembled with the card slot.

10. A battery module, characterized in that: The invention comprises the safety protection device according to any one of claims 1 to 9.

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