Battery module and energy storage device

Abstract

The utility model belongs to the technical field of energy storage equipment, and relates to a battery module and an energy storage device, the battery module comprises a battery cell group, an aluminum bar and a guide assembly; the aluminum bars are arranged on the two sides of the guide assembly and connected with the guide assembly. The top of each battery cell of the battery cell group is provided with an acquisition wire harness and an explosion venting valve which are adjacent in position, the acquisition wire harness is arranged on the aluminum bar in a penetrating mode, the guide assembly is arranged over the explosion venting valve in a covering mode, the explosion venting valve comprises a first explosion venting valve group and a second explosion venting valve group, and the guide assembly comprises a plate body, a first guide part and a second guide part. The first guide part and the second guide part are arranged at the bottom of the plate body, the first guide part is communicated with the first explosion venting valve group, the second guide part is communicated with the second explosion venting valve group, guide outlets are further formed in the two sides of the plate body in the length direction, and the guide outlets are communicated with the first guide part and the second guide part. According to the explosion venting valve, explosion venting of the explosion venting valve can be effectively guided, so that the safety of the battery module is protected.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and more specifically, to a battery module and an energy storage device. Background Art

[0002] A battery module is an energy storage device composed of multiple battery cells. A battery module generally includes a cell group and an aluminum bar. The top of each battery cell is connected to a collection harness for collecting the battery voltage. At the same time, an explosion relief valve for discharging the internal air pressure of the battery is also provided on the top of multiple battery cells. In order to prevent the high-temperature gas discharged from the explosion relief valve from damaging the collection harness, an aluminum bar is generally provided to separate the collection harness and the explosion relief valve to prevent the explosion relief valve from affecting the collection harness when discharging high-temperature gas.

[0003] However, for stacked battery modules, since the explosion relief valve is directed toward the top, the high-temperature gas discharged from the explosion relief valve will directly rush to the bottom of another battery module, thereby causing thermal runaway of the other battery module and causing damage. In severe cases, an explosion may occur, causing serious damage to the battery module. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present application is how to effectively guide the explosion relief of the explosion relief valve.

[0005] In order to solve the above technical problems, the present application provides a battery module, which adopts the following technical solution:

[0006] A battery module, comprising: a battery cell group, an aluminum bar and a guide assembly; the aluminum bar is arranged on both sides of the guide assembly and connected to the guide assembly;

[0007] The battery cell group includes a plurality of battery cells stacked in sequence, and a collection harness and an explosion relief valve adjacent to each other are arranged on the top of each battery cell, the collection harness is passed through the aluminum bar, the guide assembly cover is arranged directly above the explosion relief valve, the explosion relief valve includes a first explosion relief valve group and a second explosion relief valve group, the guide assembly includes a plate body, a first guide portion and a second guide portion, the first guide portion and the second guide portion are arranged at the bottom of the plate body, the first guide portion is communicated with the first explosion relief valve group, the second guide portion is communicated with the second explosion relief valve group, and guide outlets are also arranged on both sides of the plate body in the length direction, and the guide outlets are communicated with the first guide portion and the second guide portion.

[0008] Further, the plate body includes a bottom plate, side plates, and an upper cover plate. The side plates are connected to the bottom plate and the upper cover plate. The bottom plate faces the explosion vent valve. The first guiding portion and the second guiding portion are both provided on the bottom plate. The guiding outlet includes a first guiding opening and a second guiding opening. The first guiding portion and the second guiding portion are respectively communicated with the first guiding opening and the second guiding opening.

[0009] Further, the first guiding portion includes a first vertical guiding groove and a limiting frame. The height of the limiting frame is greater than the height of the first vertical guiding groove. The limiting frame is arranged in a U-shaped structure. A first accommodating cavity is formed between the limiting frame, the bottom plate, and the upper cover plate. The first guiding opening is provided on one side of the first accommodating cavity facing the outside. The first vertical guiding groove is arranged at the position corresponding to the first explosion vent valve group at the bottom of the first accommodating cavity. The first explosion vent valve group is communicated with the first accommodating cavity through the first vertical guiding groove.

[0010] Further, the second guiding portion includes a second vertical guiding groove and a partition plate. The height of the partition plate is the same as the height of the limiting frame. A second accommodating cavity is formed between the partition plate, the limiting frame, and the plate body. The second accommodating cavity and the first accommodating cavity are spaced apart by the limiting frame. The second guiding opening is provided on one side of the second accommodating cavity facing the outside. The second guiding opening is located outside the first guiding opening. The second vertical guiding groove is arranged at the position corresponding to the second explosion vent valve group at the bottom of the second accommodating cavity. The second explosion vent valve group is communicated with the second accommodating cavity through the second vertical guiding groove.

[0011] Further, the first guiding portion includes a first vertical guiding groove and a limiting plate. The height of the limiting plate is greater than the height of the first vertical guiding groove. The limiting plate is arranged in an L-shaped structure. Two sides of the limiting plate are connected to the side plates. A first accommodating cavity is formed between the limiting plate, the bottom plate, and the side plates. The first guiding opening is provided on one side of the first accommodating cavity facing the outside. The first vertical guiding groove is arranged at the position corresponding to the first explosion vent valve group at the bottom of the first accommodating cavity. The first explosion vent valve group is communicated with the first accommodating cavity through the first vertical guiding groove.

[0012] Further, the second guiding part includes a second vertical guiding groove and a partition plate. The partition plate has a second height. The height of the limiting plate is greater than that of the second vertical guiding groove. A second accommodating cavity is formed between the partition plate, the limiting plate and the plate body. There is a gap formed by the limiting plate between the second accommodating cavity and the first accommodating cavity. A second guiding port is provided on the side of the second accommodating cavity facing the outside. The second guiding port is located at the top of the first guiding port. The second vertical guiding groove is arranged at the bottom of the second accommodating cavity corresponding to the position of the second explosion relief valve group. The second explosion relief valve group communicates with the second accommodating cavity through the second vertical guiding groove.

[0013] Further, the number of the first guiding parts is two, which are respectively arranged at the positions corresponding to the first explosion relief valve group on both sides of the length direction of the plate body.

[0014] Further, the number of the second guiding parts is two, which are respectively arranged between the first guiding parts.

[0015] Further, the first explosion relief valve group includes at least two first explosion relief valves, and the second explosion relief valve group includes at least two second explosion relief valves. The size and number of the first vertical guiding grooves correspond to the size and number of the first explosion relief valves, and the size and number of the second vertical guiding grooves correspond to the size and number of the second explosion relief valves.

[0016] To solve the above technical problems, an embodiment of the present application further provides an energy storage device, which includes the battery module and the detection module as described above. The detection module is connected to the acquisition wire harness of the battery module and is used to detect the voltage of the battery module.

[0017] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0018] In this embodiment, by providing a battery module including a battery cell group, aluminum bars and a guiding assembly, and arranging the guiding assembly on the top of the first explosion relief valve group and the second explosion relief valve group, the first guiding part of the guiding assembly is communicated with the first explosion relief valve group, and the second guiding part is communicated with the second explosion relief valve group. And guiding outlets are arranged on both sides of the length direction of the plate body, so that the guiding outlets are communicated with the first guiding part and the second guiding part. Thus, when the first explosion relief valve group and the second explosion relief valve group perform explosion relief actions, the high-temperature gases discharged by the first explosion relief valve group and the second explosion relief valve group can be guided by the first guiding part and the second guiding part respectively, so that the high-temperature gases of the first explosion relief valve group and the second explosion relief valve group are discharged from the battery cell group through the guiding outlets, avoiding affecting the battery module on the top and protecting the safety of the battery module. Description of the Drawings

[0019] To more clearly illustrate the solutions in this application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic perspective view of the battery module of this application;

[0021] Figure 2 Exploded structural view of an embodiment of the battery module of this application;

[0022] Figure 3 Exploded structural view of another embodiment of the battery module of this application;

[0023] Reference numerals: battery cell group 1, aluminum bar 2, guiding assembly 3, explosion relief valve 11, plate body 31, first guiding portion 32, second guiding portion 33, guiding outlet 34, first explosion relief valve group 111, second explosion relief valve group 112, bottom plate 311, side plate 312, upper cover plate 313, first vertical guiding groove 321, limiting frame 322, first accommodating cavity 323, limiting plate 324, second vertical guiding groove 331, partition plate 332, second accommodating cavity 333, first guiding port 341, second guiding port 342, first explosion relief valve 111a, second explosion relief valve 112a. Detailed implementation manners

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field of this application; the terms used in the description of the application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above accompanying drawings are used to distinguish different objects and not to describe a specific order.

[0025] Referring to "embodiment" herein means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] Embodiment 1 of the battery module of this application

[0027] Refer to Figures 1 to 2, the battery module of the present application includes: a battery cell group 1, an aluminum busbar 2, and a guiding component 3; wherein, the aluminum busbar 2 is arranged on both sides of the guiding component 3 and connected to the guiding component 3.

[0028] The battery cell group 1 includes a plurality of battery cells arranged in layers in sequence. At the top of each battery cell, there are a collection wire harness (not shown in the figure) and a pressure relief valve 11 adjacent in position. The collection wire harness passes through the aluminum busbar 2. The guiding component 3 is covered directly above the pressure relief valve 11. The pressure relief valve 11 includes a first pressure relief valve group 111 and a second pressure relief valve group 112. The guiding component 3 includes a plate body 31, a first guiding part 32, and a second guiding part 33. The first guiding part 32 and the second guiding part 33 are arranged at the bottom of the plate body 31. The first guiding part 32 is communicated with the first pressure relief valve group 111, and the second guiding part 33 is communicated with the second pressure relief valve group 112. On both sides in the length direction of the plate body 31, there are also guiding outlets 34, and the guiding outlets 34 are communicated with the first guiding part 32 and the second guiding part 33.

[0029] In this embodiment, there are multiple pressure relief valves 11 located at the top of the battery cell group 1. In this embodiment, the pressure relief valves 11 are divided into pairs to form different groups of pressure relief valves 11. Specifically, the pressure relief valves 11 located at both sides in the length direction at the top of the battery cell group 1 are divided into the first pressure relief valve group 111, and the pressure relief valves 11 located at the middle position in the length direction at the top of the battery cell group 1 are divided into the second pressure relief valve group 112. In specific implementation, different divisions can also be made according to the actual number of pressure relief valves 11 at the top of the battery cell group 1. For example, if there are 4 pressure relief valves 11 at the top of the battery cell group 1, then a single pressure relief valve 11 can be divided into different groups, or if the number of pressure relief valves 11 is six, then some of them can be divided into groups of two, and the other part can be divided into single groups. The above division of the pressure relief valves 11 can be adjusted correspondingly according to the actual situation. In this embodiment, by grouping the pressure relief valves 11, when the battery cell group 1 performs a pressure relief action, the guiding component 3 can respectively guide different groups of pressure relief valves 11, so as to effectively improve the pressure relief efficiency of the guiding component 3 for the pressure relief valves 11.

[0030] The plate body 31 includes a bottom plate 311, side plates 312, and an upper cover plate 313. The bottom plate 311 and the upper cover plate 313 are parallel and are both arranged along the length direction of the battery cell group 1. The bottom plate 311 and the upper cover plate 313 are respectively connected to two ends of the side plates 312. The bottom plate 311 is located above the explosion vent valve 11 at the top of the battery cell group 1, and a through hole corresponding to the explosion vent valve 11 at the top of the battery cell group is formed on the bottom plate 311. A first vertical guiding groove 321 and a second vertical guiding groove 331 are arranged on one side of the through hole away from the explosion vent valve 11. When the guiding component 3 is installed on the explosion vent valve 11, the explosion vent valve 11 is exposed through the through hole on the bottom plate 311. The length of the bottom plate 311 corresponds to the length of the top of the battery cell group 1, or at least covers all the explosion-proof valves 11 at the top of the battery cell group 1. The side plates 312 have a predetermined height, and this height is at least greater than the height of the first vertical guiding groove 321 and the height of the second vertical guiding groove 322.

[0031] The first guiding part 32 includes a first vertical guiding groove 321 and a limiting frame 322. In this embodiment, the height of the limiting frame 322 is greater than the height of the first vertical guiding groove 321. The limiting frame 322 is arranged in a U-shaped structure. The first vertical guiding groove 321 is arranged inside the U-shaped structure of the limiting frame 322. The limiting frame 322 is located on the bottom plate 311. The bottom plate 311, the upper cover plate 313, and the limiting frame 322 together enclose a first accommodating cavity 323. The first vertical guiding groove 321 is arranged at a position corresponding to the first explosion vent valve group 111 at the bottom of the first accommodating cavity 323. The first explosion vent valve group 111 communicates with the first accommodating cavity 323 through the first vertical guiding groove 321.

[0032] In this embodiment, there are two first guiding parts 32, which are respectively arranged at both ends of the plate body 31 in the length direction. The first explosion relief valve group 111 of the explosion relief valve 11 includes two first explosion relief valves 111a arranged in pairs, and the size and quantity of the first vertical guiding grooves 321 correspond to the size and quantity of the first explosion relief valves 111a. Specifically, the first vertical guiding grooves 321 of each first guiding part 32 are arranged in pairs corresponding to the first explosion relief valves 111a. The position of the first explosion relief valve group 111 corresponds to that of the first vertical guiding grooves 321. One end of the U-shaped structure of the limiting frame 322 is a closed end, and the other end is an open end. The closed end of the limiting frame 322 is close to the second explosion relief valve group 112, the open end of the limiting frame 322 faces outward, the bottom of the limiting frame 322 is connected to the bottom plate 311, and the top of the limiting frame 322 is connected to the upper cover plate 313. A first accommodating cavity 323 for accommodating the gas discharged by the first explosion relief valve group 111 is formed among the bottom plate 311, the upper cover plate 313 and the inner side wall of the limiting frame 322. A first guiding port 341 is formed on one side of the open end of the limiting frame 322, and the first guiding port 341 faces both sides of the battery cell group 1. The height of the limiting frame 322 is higher than that of the first vertical guiding grooves 321. When the upper cover plate 313 is connected to the limiting frame 322, a gap is formed between the top of the first vertical guiding grooves 321 and the upper cover plate 313.

[0033] In this embodiment, through the first vertical guiding grooves 321 of the first guiding part 32, the high-temperature gas discharged by the first explosion relief valve group 111 can be effectively guided into the first accommodating cavity 323. Then, through the limiting effects of the bottom plate 311, the limiting frame 322 of the first guiding part 32 and the upper cover plate 313, the high-temperature gas can only be discharged from the first guiding port 324 on one side of the limiting frame 322, so as to effectively guide the high-temperature gas discharged by the first explosion relief valve group 111 to both sides of the battery cell group 1 for discharge, and avoid the influence of the first explosion relief valve group 111 on the battery module at the top during explosion relief.

[0034] The second guiding part 33 includes a second vertical guiding groove 331 and a partition plate 332. The height of the partition plate 332 is the same as that of the limiting frame. In this embodiment, the height of the partition plate 332 and the limiting frame 322 can be set to 20 mm, and corresponding adjustment can be made according to the actual situation. The partition plate 332 and the outer side walls of the bottom plate 311, the side plate 312, the upper cover plate 313 and the limiting frame 322 together enclose a second accommodating cavity 333. The second accommodating cavity 333 and the first accommodating cavity 323 are separated by the limiting frame 322. The partition plate 332 is arranged at the middle position between two adjacent second explosion relief valve groups 112, and the second vertical guiding groove 331 is arranged at the position of the bottom of the second accommodating cavity 333 corresponding to the second explosion relief valve group 112. The second explosion relief valve group 112 is communicated with the second accommodating cavity 333 through the second vertical guiding groove 331.

[0035] In this embodiment, there are two second vertical guide grooves 331, and the two second vertical guide grooves 331 are arranged adjacent to each other along the length direction of the bottom plate 311 (see Figure 2 ). The second explosion relief valve group 112 of the explosion relief valve 11 includes two second explosion relief valves 112a arranged in pairs, and the second vertical guide grooves 331 of each second guide portion 33 are arranged in pairs corresponding to the second explosion relief valves 112a.

[0036] In other embodiments, if the number of the second explosion relief valves 112a is multiple, then the number of the second vertical guide grooves 331 is also multiple. For example, if there are six second explosion relief valves 112a at the middle position of the top of the battery cell group 1, then three second explosion relief valves 112a form a group to constitute two second explosion relief valve groups 112, and the second vertical guide grooves 331 corresponding to each second explosion relief valve group 112 are also set to three. That is, the size and number of the second vertical guide grooves 331 correspond to the size and number of the second explosion relief valves 112a.

[0037] The bottom of the partition plate 332 is connected to the bottom plate 311, and the top of the partition plate 332 is connected to the upper cover plate 313. The partition plate 332, the limit frame 322, and the side plate 312 have the same height. The side plate 312, the partition plate 332, and the limit frame 332 are all higher than the second vertical guide groove 331. A second accommodation cavity 333 for accommodating the gas discharged by the second explosion relief valve group 112 is formed between the outer side walls of the bottom plate 311, the side plate 312, the upper cover plate 313, the partition plate 332, and the limit frame 322. There is a gap between the outer side walls of the side plate 312 and the limit frame 322, and this gap forms a discharge channel for the gas discharged by the second explosion relief valve group 112. The side of the discharge channel facing the outside is in communication with the outside, and this communication part is located at the openings on both sides of the plate body 31. The first guide port 341 is located within the opening. A cavity is formed between the bottom plate 311, the side plate 312, the upper cover plate 313, and the first guide port 341, and the opening of this cavity constitutes the second guide port 342. Among them, the second guide port 342 is located outside the first guide port 341.

[0038] In this embodiment, through the second vertical guide grooves 331 of the second guide portion 32, the high-temperature gas discharged by the second explosion relief valve group 112 can be effectively guided into the second accommodation cavity 333, and then through the limiting effect of the outer side walls of the partition plate 332, the bottom plate 311, the side plate 312, the upper cover plate 313, and the limit frame 322, the high-temperature gas can only be discharged from the second guide port 342 on one side of the plate body 31, so as to effectively discharge the high-temperature gas discharged by the second explosion relief valve group 112 to both sides of the battery cell group 1, and avoid the second explosion relief valve group 112 affecting the top battery module and the first explosion relief valve group 111 during explosion relief.

[0039] See Figure 2, in this embodiment, the first explosion relief valve groups 111 provided at both ends of the bottom plate 311 in the length direction each include two first explosion relief valves 111a arranged along the length direction of the bottom plate 311, and the second explosion relief valve groups 112 provided at the middle position of the bottom plate 311 in the length direction each include two second explosion relief valves 112a arranged along the length direction of the bottom plate 311. In this embodiment, the number of the first explosion relief valve groups 111 is two, the number of the first explosion relief valves 111a is four, and the number of the first vertical guide grooves 321 correspondingly is four; the number of the second explosion relief valve groups 112 is two, the number of the second explosion relief valves 112a is four, and the number of the second vertical guide grooves 331 correspondingly is four. Both the first vertical guide grooves 321 and the second vertical guide grooves 331 are through holes opened along the direction perpendicular to the horizontal direction. The size of the first vertical guide groove 321 refers to the pore diameter of the through hole of the first vertical guide groove 321. Similarly, the size of the second vertical guide groove 331 refers to the pore diameter of the through hole of the second vertical guide groove 331. The sizes of the above-mentioned through hole diameters correspond to the valve port sizes of the first explosion relief valves 111a and the second explosion relief valves 112a.

[0040] In this embodiment, by setting the size of the first vertical guide groove 321 to correspond to the size of the first explosion relief valve 111a and setting the size of the second vertical guide groove 331 to correspond to the size of the second explosion relief valve 112a, the high-temperature gas during the explosion relief of the first explosion relief valve 111a and the second explosion relief valve 112a can effectively pass through the first vertical guide groove 321 and the second vertical guide groove 331 and enter the first accommodation cavity 323 and the second accommodation cavity 333, effectively improving the discharge efficiency of the high-temperature gas of the battery module during explosion relief.

[0041] In this embodiment, by providing a battery module including a battery cell group 1, an aluminum bar 2, and a guiding component 3, and arranging the guiding component 3 on the top of the first explosion relief valve groups 111 and the second explosion relief valve groups 112, the first guiding part 32 of the guiding component 3 is communicated with the first explosion relief valve groups 111, the second guiding part 33 is communicated with the second explosion relief valve groups 112, and guiding outlets 34 are arranged on both sides of the plate body 31 in the length direction, and the guiding outlets 34 are communicated with the first guiding part 32 and the second guiding part 33. Thus, when the first explosion relief valve groups 111 and the second explosion relief valve groups 112 perform explosion relief actions, the high-temperature gas discharged from the first explosion relief valve groups 111 and the second explosion relief valve groups 112 can be guided respectively through the first guiding part 32 and the second guiding part 33, and the high-temperature gas of the first explosion relief valve groups 111 and the second explosion relief valve groups 112 is discharged to both sides of the battery cell group 1 through the guiding outlets 34, so as to effectively guide the explosion relief of the explosion relief valves 11 and protect the safety of the battery module.

[0042] The embodiment of the present application further provides an energy storage device, which includes a battery module and a detection module. The detection module is connected to a collection wire harness and is used to detect the voltage of the battery module. The battery module adopts the battery module described above.

[0043] By adopting the energy storage device with the battery module described above in this embodiment, it can effectively guide the explosion relief valve of the battery module during explosion relief to protect the safety of the battery module.

[0044] Embodiment II of the battery module of the present application

[0045] Reference Figure 3 , different from Embodiment I in that: the first guiding portion 32' includes a first vertical guiding groove 321 and a limiting plate 324. Among them, the limiting plate 324 is arranged in an L-shaped structure. The shorter end of the L-shaped structure is vertically connected to the bottom plate 311, the longer end of the L-shaped structure is parallel to the bottom plate 311, and both sides of the L-shaped structure are connected to the side plate 312. The bottom plate 311, the side plate 312, and the inner side wall of the limiting plate 324 enclose a first accommodating cavity 323'. The second guiding portion 33' includes a second vertical guiding groove 331 and a partition plate 332'. Among them, the partition plate 332' has the same height as the side plate 312'. The height of the partition plate 332' and the side plate 312' can be set to 40 mm and can be adjusted correspondingly according to the actual situation. Among them, the heights of the side plate 312' and the partition plate 332' are both higher than the height of the limiting plate 324. The top of the partition plate 332' is connected to the upper cover plate 313. The bottom plate 311, the side plate 312', the upper cover plate 313, the partition plate 332', and the outer side wall of the limiting plate 324 jointly enclose a second accommodating cavity 333'. The first guiding port 341' and the second guiding port 342' are both located on both sides of the length direction of the plate body 31 and are respectively communicated with the first accommodating cavity 323' and the second accommodating cavity 333'. Among them, the second guiding port 341' is located above the first guiding port 342'.

[0046] By arranging the second guiding port 342' above the first guiding port 341' in this embodiment, it can effectively increase the volumes of the first accommodating cavity 323' and the second accommodating cavity 333', and further improve the high-temperature gas discharge efficiency of the first explosion relief valve group 111 and the second explosion relief valve group 112 during explosion relief.

[0047] Obviously, the embodiments described above are only a part of the embodiments of this application, rather than all of them. The preferred embodiments of this application are shown in the accompanying drawings, but they do not limit the patent scope of this application. This application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of this application more thorough and comprehensive. Although this application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure that makes use of the content of the specification and drawings of this application, directly or indirectly applied in other related technical fields, is equally within the scope of patent protection of this application.

Claims

1. A battery module, characterized in that: The battery module comprises: a battery cell group (1), an aluminum bar (2) and a guide assembly (3); the aluminum bar (2) is arranged on both sides of the guide assembly (3) and is connected to the guide assembly (3); The battery cell group (1) comprises a plurality of battery cells stacked in sequence, each battery cell having a collection harness and an explosion relief valve (11) disposed adjacent to each other on the top, the collection harness being passed through the aluminum bar (2), the guide assembly (3) being disposed directly above the explosion relief valve (11), the explosion relief valve (11) comprising a first explosion relief valve group (111) and a second explosion relief valve group (112), the guide assembly (3) comprising a plate body (31), a first guide portion a (32) and a second guide portion a (33) The first guide portion a (32) and the second guide portion a (33) are arranged at the bottom of the plate body (31); the first guide portion a (32) is connected to the first explosion relief valve group (111); the second guide portion a (33) is connected to the second explosion relief valve group (112); guide outlets (34) are also arranged on both sides of the plate body (31) in the length direction; the guide outlets (34) are connected to the first guide portion a (32) and the second guide portion a (33).

2. The battery module according to claim 1, characterized in that: The plate body (31) comprises a bottom plate (311), a side plate a (312) and an upper cover plate (313); the side plate a (312) is connected to the bottom plate (311) and the upper cover plate (313); the bottom plate (311) is arranged toward the explosion relief valve (11); the first guide portion a (32) and the second guide portion a (33) are both arranged on the bottom plate (311); the guide outlet (34) comprises a first guide port (341) and a second guide port (342); the first guide portion a (32) and the second guide portion a (33) are respectively connected to the first guide port (341) and the second guide port (342).

3. The battery module according to claim 2, characterized in that: The first guide portion a (32) comprises a first vertical guide groove (321) and a limit frame (322); the height of the limit frame (322) is greater than the height of the first vertical guide groove (321); the limit frame (322) is arranged in a U-shaped structure; a first accommodating chamber a (323) is formed between the limit frame (322), the bottom plate (311) and the upper cover plate (313); the first guide opening (341) is provided on the side of the first accommodating chamber a (323) facing the outside; the first vertical guide groove (321) is arranged at a position of the bottom of the first accommodating chamber a (323) corresponding to the first explosion relief valve group (111); the first explosion relief valve group (111) is connected to the first accommodating chamber a (323) through the first vertical guide groove (321).

4. The battery module according to claim 3, characterized in that: The second guide portion a (33) comprises a second vertical guide groove (331) and an isolation plate a (332); the height of the isolation plate a (332) is the same as the height of the limit frame (322); a second accommodating chamber a (333) is formed between the isolation plate a (332), the limit frame (322) and the plate body (31); the second accommodating chamber a (333) and the first accommodating chamber a (323) are spaced apart by the limit frame (322); a second guide opening (342) is provided on the side of the second accommodating chamber a (333) facing outwards; the second guide opening (342) is located outside the first guide opening (341); the second vertical guide groove (331) is provided at the bottom of the second accommodating chamber a (333) corresponding to the position of the second explosion relief valve group (112); the second explosion relief valve group (112) is connected to the second accommodating chamber a (333) through the second vertical guide groove (331).

5. The battery module according to claim 2, characterized in that: The first guide portion b (32') comprises a first vertical guide groove (321) and a limiting plate (324); the height of the limiting plate (324) is greater than the height of the first vertical guide groove (321); the limiting plate (324) is arranged in an L-shaped structure; two sides of the limiting plate (324) are connected to the side plate b (312'); a first accommodating chamber b (323') is formed between the limiting plate (324), the bottom plate (311) and the side plate b (312'); a first guide opening (341) is provided on a side of the first accommodating chamber b (323') facing the outside; the first vertical guide groove (321) is arranged at a position of the bottom of the first accommodating chamber b (323') corresponding to the first explosion relief valve group (111); the first explosion relief valve group (111) is connected to the first accommodating chamber b (323') through the first vertical guide groove (321).

6. The battery module according to claim 5, characterized in that: The second guide portion b (33') comprises a second vertical guide groove (331) and an isolation plate b (332'), the height of the isolation plate b (332') being greater than the height of the limiting plate (324), the height of the limiting plate (324) being greater than the height of the second vertical guide groove (331), a second accommodating cavity b (333') being formed between the isolation plate b (332'), the limiting plate (324) and the plate body (31), and a second accommodating cavity b (333') being formed between the second accommodating cavity b (333') and the first accommodating cavity b (323'). The limiting plate (324) forms a gap, and the second guide opening (342) is provided on the side of the second accommodating chamber b (333') facing outwards, and the second guide opening (342) is located at the top of the first guide opening (341). The second vertical guide groove (331) is provided at the bottom of the second accommodating chamber b (333') corresponding to the position of the second explosion relief valve group (112), and the second explosion relief valve group (112) is connected with the second accommodating chamber b (333') through the second vertical guide groove (331).

7. The battery module according to claim 4 or 6, characterized in that: The number of the first guide parts a (32) is two, which are respectively arranged at two sides of the plate body (31) in the length direction corresponding to the positions of the first explosion relief valve group (111).

8. The battery module according to claim 7, characterized in that: The number of the second guide parts a (33) is two, and they are respectively arranged between the first guide parts a (32).

9. The battery module according to claim 4 or 6, characterized in that: The first explosion relief valve group (111) includes two first explosion relief valves (111a), the second explosion relief valve group (112) includes at least two second explosion relief valves (112a), the size and number of the first vertical guide grooves (321) correspond to the size and number of the first explosion relief valves (111a), and the size and number of the second vertical guide grooves (331) correspond to the size and number of the second explosion relief valves (112a).

10. An energy storage device, characterized in that: The energy storage device comprises a battery module and a detection module as described in any one of claims 1 to 9, wherein the detection module is connected to a collection harness of the battery module for detecting the voltage of the battery module.

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