阅读说明：本技术 电池模组、电池箱及电池包 (Battery module, battery box and battery pack ) 是由 温金辉 王建立 王新锋 于 2021-08-26 设计创作，主要内容包括：本发明公开一种电池包,包括两个电池模组与一个电池箱；每个电池模组包括若干模块单元及至少一个盖板；每个模块单元包括一对电池架、若干单体电池,电池架的顶端凸起形成一对封板,一对封板相互靠近的一侧分别开设有与盖板卡合的第一卡槽；电池箱包括下箱体、盖在下箱体上的上箱体以及用于固定电池模组的固定架；固定架包括第一托架以及若干与第一托架接插配合的第二托架,第一托架用于承载一个电池模组,第二托架与第一托架接插配合后用于承载另一个电池模组。与现有技术相比,有益效果在于：通过第一托架与第二托架来承载两个电池模组,且第二托架与第一托架之间接插配合,便于拆卸和组装,利于提高电池包的组装效率。(The invention discloses a battery pack which comprises two battery modules and a battery box, wherein the two battery modules are connected with the battery box; each battery module comprises a plurality of module units and at least one cover plate; each module unit comprises a pair of battery frames and a plurality of single batteries, wherein a pair of sealing plates are formed by protruding the top ends of the battery frames, and first clamping grooves clamped with the cover plate are respectively formed in one sides, close to each other, of the pair of sealing plates; the battery box comprises a lower box body, an upper box body covered on the lower box body and a fixing frame for fixing the battery module; the fixing frame comprises a first bracket and a plurality of second brackets which are in plug fit with the first bracket, the first bracket is used for bearing one battery module, and the second brackets are used for bearing another battery module after being in plug fit with the first bracket. Compared with the prior art, beneficial effect lies in: bear two battery module through first bracket and second bracket, and connect to connect between second bracket and the first bracket and insert the cooperation, convenient to detach and equipment do benefit to the packaging efficiency who improves the battery package.)

1. A battery pack, comprising: comprises two battery modules and a battery box;

each battery module comprises a plurality of module units, an end cover assembly and at least one cover plate which are sequentially connected in series, wherein the end cover assembly comprises a positive end cover, a negative end cover and a plurality of fixing columns, and the fixing columns sequentially penetrate through the module units and are connected between the positive end cover and the negative end cover; each module unit comprises a pair of battery frames which are buckled with each other, a plurality of single batteries fixed between the battery frames and a pair of confluence assemblies, wherein a pair of sealing plates are formed by the top end of each battery frame in a protruding mode, the sealing plates are arranged on two sides of each battery frame respectively, a first clamping groove clamped with the cover plate is formed in one side close to each other, and the confluence assemblies are arranged on one side far away from each other of the corresponding battery frames respectively and are used for electrically connecting the corresponding single batteries;

the battery box comprises a lower box body, an upper box body covered on the lower box body, a sealing element pressed between the lower box body and the upper box body and a fixing frame for fixing a battery module; the fixing frame comprises a first bracket and a plurality of second brackets which are in plug fit with the first bracket, the first bracket is used for bearing one battery module, and the second brackets are in plug fit with the first bracket and then used for bearing another battery module.

2. The battery pack according to claim 1, wherein a wire fixing plate is formed at the top end of the battery holder in a protruding manner, the wire fixing plate is U-shaped and is located between the pair of sealing plates, and a rectangular space is defined by the two wire fixing plates after the pair of battery holders are fastened.

3. The battery pack according to claim 2, wherein a collection platform for placing a collection plate is arranged in the middle of the top end of the battery holder, an opening for the collection platform to pass through is arranged in the middle of the wire fixing plate, and a pair of buckles for fixing the collection plate is further arranged at the opening of the wire fixing plate.

4. The battery pack according to claim 1, wherein the battery holder includes a rectangular bottom wall and a plurality of side walls extending from edges of the bottom wall, the bottom wall is provided with a plurality of receiving slots for fixing one end of the single batteries, the bottom of each receiving slot is provided with a first through hole penetrating through the bottom wall, the positive end or the negative end of each single battery is electrically connected to the bus bar assembly after passing through the first through hole, and the side wall at the top end is provided with the sealing plate, the wire fixing plate and the collecting platform; the bottom wall is also provided with a plurality of second through holes for the fixing columns to pass through at the position close to the side wall.

5. The battery pack according to claim 1, wherein each module unit is further provided with a heating module comprising a band-shaped heating plate and a connector connected to one end of the heating plate, the heating plate being waved and sandwiched between the corresponding unit cells.

6. The battery pack according to claim 1, wherein the first bracket comprises a bottom support for carrying the battery module and two limiting frames erected on the bottom support, the battery module is fixed between the two limiting frames after being placed on the bottom support, the two sides of the bottom support are respectively provided with a number of plug holes corresponding to the number of the limiting frames, and the second bracket is U-shaped and forms a plug fit with the bottom support through the plug holes.

7. The battery pack as claimed in claim 6, wherein the bottom bracket comprises two first beams and a plurality of second beams connected between the two first beams, the plug jack is disposed on the first beams, the plurality of second beams are disposed between the two limiting frames, and the first beams are disposed along the length direction of the lower case and at the connection position of the lower bottom plate and the lower side plate.

8. The battery pack according to claim 7, wherein the limiting frame is shaped like a square frame and comprises two first limiting beams and a second limiting beam connected between the two first limiting beams, one of the first limiting beams is connected between the two first cross beams, and the height of the first limiting beam is greater than that of the second cross beam, so that the battery module on the bottom support can be limited and fixed by the two first limiting beams.

9. The battery pack according to claim 8, wherein the height of the second limiting beam is greater than that of the second bracket, so that the battery module on the second bracket can be limited and fixed by the two first limiting beams.

10. The battery pack according to claim 1, wherein the lower case includes a lower bottom plate and a lower side plate extending from an edge of the lower bottom plate, and a lower receiving space for receiving the fixing frame is defined between the lower bottom plate and the lower side plate; the upper box body comprises an upper bottom plate and an upper side plate formed by extending from the edge of the upper bottom plate, an upper accommodating space for accommodating a battery module is defined between the upper bottom plate and the upper side plate, and the sealing element is pressed between the lower side plate and the upper side plate.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of batteries, in particular to a battery module, a battery box and a battery pack.

[ background of the invention ]

At present, because lithium ion battery has the voltage height, the capacity is big, small, the quality is light, operating temperature range advantage such as wide, by the wide application in electric vehicle field, electric vehicle generally adopts the battery module to drive, the battery module adopts secondary battery to constitute usually, can the battery produce a large amount of heats when using, if the battery module current abnormity then leads to the high temperature easily, thereby arouse the incident, consequently the reliability of electricity connection must be guaranteed to the battery module after being in groups.

However, in the prior art, after the battery module is installed in the battery box, the electrical connection members on the battery module are not specially protected, and the electrical connection members are generally exposed in the battery box, so that the installation and the disassembly of the battery module are not facilitated, and foreign matters can easily enter the battery module to influence the stability of the electrical connection.

In view of the above, it is desirable to provide a battery module, a battery box and a battery pack to overcome the disadvantages of the prior art.

[ summary of the invention ]

The invention aims to provide a battery pack, which aims to conveniently provide the safety of a battery module.

In order to achieve the above object, the present invention provides a battery pack, which includes two battery modules and a battery box; each battery module comprises a plurality of module units, an end cover assembly and at least one cover plate which are sequentially connected in series, wherein the end cover assembly comprises a positive end cover, a negative end cover and a plurality of fixing columns, and the fixing columns sequentially penetrate through the module units and are connected between the positive end cover and the negative end cover; each module unit comprises a pair of battery frames which are buckled with each other, a plurality of single batteries fixed between the battery frames and a pair of confluence assemblies, wherein a pair of sealing plates are formed by the top end of each battery frame in a protruding mode, the sealing plates are arranged on two sides of each battery frame respectively, a first clamping groove clamped with the cover plate is formed in one side close to each other, and the confluence assemblies are arranged on one side far away from each other of the corresponding battery frames respectively and are used for electrically connecting the corresponding single batteries; the battery box comprises a lower box body, an upper box body covered on the lower box body, a sealing element pressed between the lower box body and the upper box body and a fixing frame for fixing a battery module; the fixing frame comprises a first bracket and a plurality of second brackets which are in plug fit with the first bracket, the first bracket is used for bearing one battery module, and the second brackets are in plug fit with the first bracket and then used for bearing another battery module.

As an improvement of the battery pack, the top end of the battery rack is also protruded to form a wire fixing plate, the wire fixing plate is U-shaped and is positioned between the pair of sealing plates, and two corresponding wire fixing plates after the pair of battery racks are buckled enclose a rectangular space.

As an improvement of the battery pack, the middle part of the top end of the battery frame is provided with a collection platform for placing a collection plate, the middle part of the wire fixing plate is provided with an opening for the collection platform to pass through, and the wire fixing plate is also provided with a pair of buckles for fixing the collection plate at the opening.

As an improvement of the battery pack of the present invention, the battery holder includes a rectangular bottom wall and a plurality of side walls extending from an edge of the bottom wall, the bottom wall is provided with a plurality of accommodating grooves for fixing one end of the single battery, the bottom of each accommodating groove is provided with a first through hole penetrating through the bottom wall, a positive electrode end or a negative electrode end of the single battery penetrates through the first through hole and then is electrically connected to the bus assembly, and the side wall at the top end is provided with the sealing plate, the wire fixing plate and the collecting platform; the bottom wall is also provided with a plurality of second through holes for the fixing columns to pass through at the position close to the side wall.

As an improvement of the battery pack, each module unit is also provided with a heating module, each heating module comprises a strip-shaped heating plate and a connector connected with one end of the heating plate, and the heating plates are wavy and clamped between the corresponding single batteries.

As an improvement of the battery pack, the first bracket comprises a bottom support for bearing a battery module and two limiting frames which are vertically arranged on the bottom support, the battery module is arranged on the bottom support and then fixed between the two limiting frames, the two sides of the bottom support are respectively provided with plug holes with the number consistent with that of the limiting frames, and the second bracket is U-shaped and forms plug fit with the bottom support through the plug holes.

As an improvement of the battery pack of the invention, the bottom support comprises two first beams and a plurality of second beams connected between the two first beams, the plug jack is arranged on the first beams, the plurality of second beams are positioned between the two limit frames, and the first beams are arranged along the length direction of the lower box body and at the connection position of the lower bottom plate and the lower side plate.

As an improvement of the battery pack of the present invention, the limiting frame is in a square frame shape and includes two first limiting beams and a second limiting beam connected between the two first limiting beams, wherein one of the first limiting beams is connected between the two first cross beams, and the height of the first limiting beam is greater than the height of the second cross beam, so that the battery module on the bottom support can be limited and fixed by the two first limiting beams.

As an improvement of the battery pack of the present invention, the height of the second limiting beam is greater than the height of the second bracket, so that the battery module on the second bracket can be limited and fixed by the two first limiting beams.

As an improvement of the battery pack of the present invention, the lower case includes a lower bottom plate and a lower side plate extending from an edge of the lower bottom plate, and a lower receiving space for receiving the fixing frame is defined between the lower bottom plate and the lower side plate; the upper box body comprises an upper bottom plate and an upper side plate formed by extending from the edge of the upper bottom plate, an upper accommodating space for accommodating a battery module is defined between the upper bottom plate and the upper side plate, and the sealing element is pressed between the lower side plate and the upper side plate.

Compared with the prior art, the battery pack has the beneficial effects that: the collecting plate and the wiring are placed by arranging the wire fixing plate and the collecting platform at the top end of the battery rack, so that the battery pack is more visual and convenient to assemble the collecting plate, and the collecting plate and the electric elements at the top end of the module unit can be well protected by arranging the sealing plate for installing the cover plate at the top end of the battery rack, so that the reliability of the battery module is improved; the battery box bears two battery modules through first bracket and second bracket, can improve the steadiness of two battery modules, and connects to connect to insert between second bracket and the first bracket and connect the cooperation, and convenient to detach and equipment do benefit to the packaging efficiency who improves the battery package.

[ description of the drawings ]

Fig. 1 is an exploded perspective view of a battery pack according to the present invention.

Fig. 2 is an exploded perspective view of the battery module shown in fig. 1.

Fig. 3 is an exploded perspective view of the module unit shown in fig. 1.

Fig. 4 is a perspective view of the battery stand shown in fig. 1.

Fig. 5 is a perspective view of the battery stand of fig. 1 at another angle.

Fig. 6 is an exploded perspective view of the battery case shown in fig. 1.

Fig. 7 is an exploded perspective view of the holder of fig. 1.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, the present invention provides a battery pack 100, wherein the battery pack 100 includes two battery modules 1 connected in series and a battery box 2 for accommodating the battery modules 1.

In an embodiment of the present invention, referring to fig. 2 to fig. 5, the battery module 1 includes a plurality of module units 10, an end cap assembly 12 and at least one cover plate 13, which are sequentially connected in series, the end cap assembly 12 includes a positive end cap 121, a negative end cap 122 and a plurality of fixing posts 123, the fixing posts 123 sequentially penetrate through the module units 10 and are connected between the positive end cap 121 and the negative end cap 122, that is, the module units 10 are fixed between the positive end cap 121 and the negative end cap 122.

Each module unit 10 includes a pair of battery racks 101 engaged with each other, a plurality of unit batteries 102 fixed between the pair of battery racks 101, and a pair of bus assemblies 103, and the pair of bus assemblies 103 are respectively disposed on the sides of the pair of corresponding battery racks 101 away from each other and electrically connect the corresponding unit batteries 102. A pair of closing plates 1011 and a wire fixing plate 1012 are formed at the top end of the battery rack 101 in a protruding manner, the pair of closing plates 1011 are respectively disposed at two sides of the battery rack 101, a first clamping groove 1013 engaged with the cover plate 13 is respectively disposed at one side close to each other, the wire fixing plate 1012 is U-shaped and is located between the pair of closing plates 1011, and two corresponding wire fixing plates 1012 enclose a rectangular space after the pair of battery racks 101 are fastened, and the rectangular space can be used for placing other electrical components on the battery pack 100.

Further, a collection platform 1014 for placing a collection plate (not shown) is arranged in the middle of the top end of the battery rack 101, correspondingly, an opening for the collection platform 1014 to pass through is arranged in the middle of the wire fixing plate 1012, and a pair of buckles 1015 for fixing the collection plate is further arranged at the opening of the wire fixing plate 1012. Preferably, the wire fixing plate 1012 is provided with a plurality of wire slots 1016 for routing, and the collection plate and the wire harness in the rectangular space can be arranged and fixed through the wire slots 1016.

It can be understood that after the two side edges of the cover plate 13 are clamped in the first clamping grooves 1013 of the cover plate 1011, the cover plate 13 will close the top of the battery module 1, so as to protect the electrical components placed in the rectangular space and the collecting plate placed on the collecting platform 1014.

In one embodiment, the battery rack 101 includes a rectangular bottom wall 104 and a plurality of side walls 105 extending from an edge of the bottom wall 104, the bottom wall 104 is provided with a plurality of receiving slots 1041 for fixing one end of the single battery 102, a first through hole 1042 penetrating through the bottom wall 104 is formed at a bottom of the receiving slot 1041, a positive terminal or a negative terminal of the single battery 102 passes through the first through hole 1042 and then is electrically connected to the bus bar assembly 103, wherein the side wall 105 at a top end is provided with the sealing plate 1011, the wire fixing plate 1012 and the collecting platform 1014. The bottom wall 104 is further provided with a plurality of second through holes 1043 at positions close to the side wall 105 for the fixing posts 123 to pass through.

In this embodiment, the single battery 102 is a cylindrical lithium ion battery, the fixing column 123 is cylindrical, and correspondingly, the first through hole 1042 and the second through hole 1043 are circular holes. Preferably, the receiving slots 1041 on the bottom wall 104 are arranged in a plurality of rows, and the two adjacent rows of receiving slots 1041 are arranged in a staggered manner, so as to reduce the gap between the single batteries 102, and make the module unit 10 more compact.

Further, each battery rack 101 is provided with a plurality of first clamping plates 1051 and a plurality of second clamping plates 1052 which can be buckled with the first clamping plates 1051 at one end of the pair of side walls 105 far away from the corresponding bottom wall 104, for example, the outer side of one end of the first clamping plates 1051 far away from the corresponding side walls 105 may be provided with clamping protrusions, one end of the second clamping plates 1052 far away from the corresponding side walls 105 may be provided with clamping holes which can be buckled with the clamping protrusions, and the pair of battery racks 101 are buckled and connected through the clamping protrusions and the clamping holes.

In one embodiment, each module unit 10 is further provided with a heating module 106, the heating module 106 comprises a strip-shaped heating plate 1061 and a connector 1062 connected to one end of the heating plate 1061, the heating plate 1061 is corrugated and sandwiched between the corresponding unit cells 102, and the connector 1062 is electrically connected to the corresponding module unit 10 to supply power to the heating plate 1061. It can be understood that the heating plate 1061 makes full use of the gap between the unit cells 102 for installation, which not only saves space, but also the heating plate 1061 is located inside the module unit 10, so that the heating effect is better.

In one embodiment, each of the bus bar assemblies 103 includes a bus bar 107 and at least two conductive plates 108, each of the conductive plates 108 is electrically connected to the positive terminals or the negative terminals of two adjacent rows of the single batteries 102 to connect the two adjacent rows of the single batteries 102 in parallel, that is, each of the module units 10 includes at least four rows of the single batteries 102, and the bus bar 107 connects all the conductive plates 108 in parallel.

Further, the conductive plate 108 is made of a nickel plate, and the conductive plate 108 includes a main body portion 1081 and a plurality of conductive portions 1082 formed by extending two sides of the main body portion 1081, and each conductive portion 1082 is electrically connected to a positive electrode or a negative electrode of one single battery 102.

Further, the bus bar 107 is fixed on a side of the corresponding battery frame 101 away from the corresponding battery cell 102, and the conductive plate 108 is fixed on a side of the corresponding bus bar 107 away from the corresponding battery frame 101, for this reason, a plurality of through holes 1071 for the conductive portions 1082 to pass through are formed on the bus bar 107, and because a certain height difference exists between the main body portion 1081 of the conductive plate 108 and the corresponding battery cell 102, one end of each conductive portion 1082 close to the corresponding main body portion 1081 is bent to form a connecting portion 1084 vertically connected between the conductive portion 1082 and the corresponding main body portion 1081, and the height difference between the main body portion 1081 and the corresponding battery cell 102 is offset by the connecting portion 1084, so that the conductive portion 1082 can abut against a positive electrode or a negative electrode of the corresponding battery cell 102 to smoothly complete welding and fixing.

Further, in order to facilitate the series connection between two module units 10, one end of each bus bar 107 extends out of the top end of the corresponding battery rack 101 and then extends along the length direction of the single battery 102 to form a terminal plate 1072, and the extending heights of the two bus bars 107 on each module unit 10 are different, so that the series connection between two adjacent module units 10 is formed by stacking the two terminal plates 1072 on the two bus bars 107. Preferably, each of the connection plates 1072 is further formed with a plurality of connection holes 1073, and the two stacked connection plates 1072 are tightly fixed together by passing screws through the connection holes 1073 to ensure stability of electrical connection.

In summary, in the battery module 1 provided by the present invention, the wire fixing plate 1012 and the collection platform 1014 are disposed at the top end of the battery rack 101 to place the collection plate and the wires, so that the battery pack is more intuitive and convenient to assemble, and the seal plate 1011 for mounting the cover plate 13 is disposed at the top end of the battery rack 101, so that the collection plate and the electrical elements at the top end of the module unit 10 can be well protected, thereby improving the reliability of the battery module 1. Meanwhile, the heating module 106 is arranged, and the heating module 106 is arranged between the single batteries 102, so that the space is saved, the heating effect is better, and the low-temperature performance of the battery module 1 can be improved.

In an embodiment of the present invention, referring to fig. 6 and fig. 7, the battery box 2 includes a lower box 21, an upper box 23 covering the lower box 21, a sealing member 24 pressed between the lower box 21 and the upper box 23, and a fixing frame 25 for fixing the battery module 1.

The lower case 21 includes a lower bottom plate 211 and a lower side plate 212 extending from an edge of the lower bottom plate 211, a lower receiving space 213 for receiving the fixing frame 25 is defined between the lower bottom plate 211 and the lower side plate 212, correspondingly, the upper case 23 includes an upper bottom plate 231 and an upper side plate 232 extending from an edge of the upper bottom plate 231, an upper receiving space (not shown) for receiving a battery module 1 is defined between the upper bottom plate 231 and the upper side plate 232, and the sealing member 24 is pressed between the lower side plate 212 and the upper side plate 232.

The fixing frame 25 includes a first bracket 26 and a plurality of second brackets 27 connected to the first bracket 26 in a plugging manner, the first bracket 26 is used for bearing one battery module 1 of the battery pack 100, and the second brackets 27 are connected to the first bracket 26 in a plugging manner and then are used for bearing another battery module 1 of the battery pack 100. It can be understood that the two battery modules 1 are respectively installed through the first bracket 26 and the second bracket 27, and the stress of the fixing frame 25 is more uniformly dispersed, which is beneficial to ensuring the fixing firmness of the battery modules 1.

Specifically, the first bracket 26 includes a bottom bracket 261 for supporting the battery module 1, and two limiting frames 262 standing on the bottom bracket 261 and used for fixedly connecting the battery module 1, that is, the battery module 1 is fixed between the two limiting frames 262 after being placed on the bottom bracket 261. The two sides of the bottom support 261 are respectively provided with the number of the plug holes 263 corresponding to the number of the limit frames 262, and the second bracket 27 is U-shaped and forms a plug-in fit with the bottom support 261 through the plug holes 263. In this embodiment, the second bracket 27 includes two vertical beams 271 and a bearing beam 272 connected between the two vertical beams 271 and used for bearing the battery module 1, and an end of the vertical beam 271 away from the bearing beam 272 is inserted and matched with the patch hole 263.

It is understood that when the battery modules 1 are mounted, the second bracket 27 should be removed from the bottom bracket 261, one battery module 1 should be fixed on the bottom bracket 261, the second brackets 27 should be inserted into the bottom bracket 261 one by one, and then another battery module 1 should be fixed on the top end of the second bracket 27 through the two limit frames 262.

Further, the bottom bracket 261 includes two first beams 2611 and a plurality of second beams 2612 connected between the two first beams 2611, the patch hole 263 is disposed on the first beam 2611, and the plurality of second beams 2612 are located between the two limiting frames 262. Here, the first cross member 2611 is disposed along a length direction of the lower case 21 and at a connection portion of the lower bottom plate 211 and the lower side plate 212 to increase mechanical strength of the lower case 21.

The limiting frame 262 is in a square frame shape and comprises two first limiting beams 2621 and a second limiting beam 2622 connected between the two first limiting beams 2621, wherein one first limiting beam 2621 is connected between the two first beams 2611, and the height of the first limiting beam 2621 is greater than that of the second beam 2612, so that the battery module 1 on the collet 261 can be limited and fixed by the two first limiting beams 2621, and the height of the second limiting beam 2622 is greater than that of the second bracket 27, so that the battery module 1 on the second bracket 27 can also be limited and fixed by the two first limiting beams 2621.

Preferably, the bottom bracket 261 further includes a plurality of reinforcing beams 2613, each reinforcing beam 2613 is connected between two adjacent second beams 2612 or between one adjacent second beam 2612 and one limiting frame 262 along the length direction of the lower box 21, and the reinforcing beams 2613 are used for increasing the stability of the first bracket 26.

Furthermore, a plurality of sealing studs 2121 are embedded in one end of the lower side plate 212, which is far away from the lower bottom plate 211, a plurality of sealing bolts 2321, which are in one-to-one fit with the sealing studs 2121, are arranged at one end of the upper side plate 232, which is far away from the upper bottom plate 231, in a penetrating manner, a plurality of sealing holes 2401, through which the sealing bolts 2321 pass, are arranged on the sealing element 24, and after the sealing bolts 2321 pass through the sealing holes 2401, the sealing bolts cooperate with the sealing studs 2121 to fix the upper box body 23 on the lower box body 21, and meanwhile, the sealing element 24 is pressed between the lower box body 21 and the upper box body 23.

Further, the lower side plate 212 is further provided with a communication port 2122, a connection port 2123, an explosion-proof valve (not shown), and a plurality of fixing seats 2124, the battery pack 100 is in communication connection with other devices through the communication port 2122, the battery pack 100 is in charge-discharge connection with other devices through the connection port 2123, the phenomenon of over-high air pressure in the battery box 2 is prevented through the explosion-proof valve, and the battery pack 100 is fixed on a designated electric vehicle or device through the fixing seats 2124.

In summary, according to the battery box 2 provided by the invention, the fixing frame having the first bracket 26 and the second bracket 27 is arranged in the lower box body 21 to respectively bear the two battery modules 1, so that the stress is more uniform, the fixing stability of the battery modules 1 can be improved, and the second bracket 27 is in plug-in fit with the first bracket 26, so that the disassembly and the assembly are convenient, and the assembly efficiency of the battery modules 1 is improved.

The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.