Battery pack and electric device

Abstract

The utility model provides a battery pack and a power utilization device, the battery pack comprises a battery module and a support, the battery module comprises at least one row of battery cell units, each row of battery cell units comprises a plurality of battery cells which are arranged side by side in the same direction, and anti-explosion valves and electrode poles of the battery cells are located on the two axial sides of the battery cells respectively; the battery module is transversely mounted on the bracket, and an exhaust area and an electrical area are respectively formed on two sides of the bracket along the axial direction of the battery core. And when the battery cell is subjected to thermal runaway, the electrolyte or gas in the battery cell is not easy to spray on an electrical part after being discharged from the anti-explosion valve, so that secondary thermal runaway is not caused, and the safety of the battery pack is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and an electrical device. Background Art

[0002] In the related art, when a battery pack experiences thermal runaway, the electrolyte in the single cell will be sprayed onto the electrical components under the action of internal pressure, which can easily cause a short circuit in the electrical components and cause secondary thermal runaway, which is not conducive to improving the overall safety performance of the battery pack and leads to a major safety hazard in the power battery pack. Utility Model Content

[0003] The purpose of the present application is to provide a battery pack and an electrical device to solve the technical problem of low safety of battery packs in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted in this application is:

[0005] In a first aspect, the present application provides a battery pack, comprising: a battery module and a bracket, the battery module comprising at least one row of battery cell units, each row of battery cell units comprising a plurality of battery cells arranged side by side in the same direction, and the explosion-proof valves and electrode poles of the battery cells are respectively located on both sides of the axial direction of the battery cells; the battery module is laterally mounted on the bracket, and an exhaust area and an electrical area are respectively formed on both sides of the bracket along the axial direction of the battery cells.

[0006] In one or more embodiments of the present application, the bracket includes a first side plate and a second side plate, the first side plate is provided with a first through hole at the position of the electrode pole corresponding to the battery cell, the first through hole is set as a first limiting groove on the side facing the battery cell, and the first through hole is set as a first clearance hole on the side facing away from the battery cell; the second side plate is provided with a second through hole at the position of the explosion-proof valve corresponding to the battery cell, the second through hole is set as a second limiting groove on the side facing the battery cell, and the second through hole is set as a second clearance hole on the side facing away from the battery cell.

[0007] In one or more embodiments of the present application, the electrical zone is provided with a sampling connection component electrically connected to the electrode pole.

[0008] In one or more embodiments of the present application, it also includes:

[0009] The housing is provided with a space for accommodating the bracket, and the bracket is arranged in the housing;

[0010] A pressure relief valve is arranged on the shell corresponding to the exhaust area.

[0011] In one or more embodiments of the present application, the battery pack includes two brackets arranged opposite to each other, wherein the second side plates of the two brackets are arranged opposite to each other, the exhaust area is formed between the two second side plates arranged opposite to each other, and the electrical area is formed between the first side plate and the shell.

[0012] or,

[0013] The first side plates of the two brackets are arranged opposite to each other, the electrical area is formed between the two first side plates arranged opposite to each other, and the exhaust area is formed between the second side plate and the shell.

[0014] In one or more embodiments of the present application, when the second side plates of the two brackets are arranged opposite to each other, the second side plates are respectively provided with first flanges on both sides along the height direction thereof, and a second flange is provided at one end of the second side plate along the length direction thereof, and the second side plates of the two brackets are arranged opposite to each other so that the exhaust area is formed between the first flange and the second flange, and is closed at the end of the second flange and is open at the end away from the second flange;

[0015] The first side plate and the second side plate are fixedly connected via a connecting column.

[0016] In one or more embodiments of the present application, an isolation plate is provided on the outer side of the second evacuation hole of the second side plate, and a thinning area is provided on the isolation plate at a position facing the explosion-proof valve of the battery cell.

[0017] In one or more embodiments of the present application, an insulating layer is provided on the outer side of the sampling connection assembly.

[0018] In one or more embodiments of the present application, when the first side plates of two brackets are arranged opposite to each other, a spacer is provided between the first side plates arranged opposite to each other.

[0019] A support plate is arranged at the bottom of the bracket along the height direction thereof, and the first side plate, the second side plate and the spacer are all fixed to the support plate.

[0020] In a second aspect, the present application further provides an electrical device, comprising the battery pack described in the first aspect.

[0021] Based on the above technical solution, the battery pack and power device provided by the present application have at least the following beneficial effects:

[0022] A battery pack provided by the present application includes a battery module and a bracket, wherein the battery module includes at least one row of battery cells, each row of battery cells includes a plurality of battery cells arranged side by side in the same direction, and the explosion-proof valve and electrode pole of the battery cell are respectively located on both sides of the axial direction of the battery cell; the battery module is transversely mounted on the bracket, and an exhaust zone and an electrical zone are respectively formed on both sides of the bracket along the axial direction of the battery cell. By making the explosion-proof valve and electrode pole of the battery cell respectively located on both sides of the axial direction of the battery cell, and making the plurality of battery cells of each row of battery cells arranged side by side in the same direction, all the explosion-proof valves of the battery module can be located in the exhaust zone, the electrode pole of the battery cell in the battery module and the electrical parts for electrically connecting the electrode pole are located in the electrical zone, the exhaust zone and the electrical zone are respectively located on both sides of the bracket along the axial direction of the battery cell, so that the exhaust channel and the electrical parts in the battery module are separated, and thermal and electrical separation is realized. When the battery cell has thermal runaway, the electrolyte or gas inside the battery cell is not easy to be sprayed on the electrical parts after being discharged from the explosion-proof valve, and secondary thermal runaway will not occur, thereby improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 is a schematic diagram of the three-dimensional structure of a battery pack provided by one or more embodiments of the present application;

[0025] Figure 2 is a schematic diagram of a longitudinal cross-sectional structure of a battery pack provided by one or more embodiments of the present application;

[0026] Figure 3 is a schematic diagram of the three-dimensional structure of a battery pack provided by one or more embodiments of the present application;

[0027] Figure 4 is a schematic diagram of the three-dimensional structure of a battery cell provided by one or more embodiments of the present application;

[0028] Figure 5 is a schematic diagram of a three-dimensional structure of a battery cell provided by one or more embodiments of the present application from another perspective;

[0029] Figure 6 is a schematic diagram of the three-dimensional structure of a battery pack provided by one or more embodiments of the present application;

[0030] Figure 7 is a schematic diagram of the structure of an isolation plate provided by one or more embodiments of the present application;

[0031] Figure 8is a schematic diagram of a three-dimensional structure of a battery pack (without the insulating layer) provided in one or more embodiments of the present application;

[0032] Fig. 9 is a schematic diagram of a three-dimensional structure of a battery pack (without the isolation plate) provided in one or more embodiments of the present application;

[0033] Fig.10 is a schematic diagram of an exploded structure of a battery pack provided by one or more embodiments of the present application;

[0034] Fig.11 is a schematic structural diagram of a battery pack from another perspective provided by one or more embodiments of the present application;

[0035] Fig.12 is a schematic diagram of the structure of a battery pack provided by one or more embodiments of the present application;

[0036] Fig.13 yes Fig.12 a top view of the schematic diagram shown;

[0037] Fig.14 yes Fig.13 AA cross section in;

[0038] Fig.15 yes Fig.12 The exploded structure diagram of the battery pack shown;

[0039] Fig.16 yes Fig.12 An exploded schematic diagram of a partial structure of a battery pack is shown.

[0040] In the figure: 1-battery module; 2-bracket; 3-shell; 4-pressure relief valve; 5-exhaust area; 6-electrical area; 7-partition; 8-support plate; 9-battery management system; 10-cell unit; 11-cell; 21-second side plate; 22-first side plate; 23-isolation plate; 24-connecting column; 25-fixing plate; 110-electrode column; 111-positive column; 112-negative column; 113-explosion-proof valve; 210-second through hole; 211-first convex edge; 212-second convex edge; 213-third convex edge; 214-second clearance hole; 215-second limiting groove; 216-notch; 220-first through hole; 221-first limiting groove; 222-first clearance hole; 231-thinning area; 241-fastener; 601-insulating layer; 602-sampling connection assembly, 801-card slot. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the related art, the electrical components in the battery pack are usually arranged close to the explosion-proof valve of the battery pack. Therefore, when thermal runaway occurs in the battery pack, the electrolyte discharged from the explosion-proof valve in the battery cell will be sprayed onto the electrical components under the action of its internal pressure, which can easily cause a short circuit in the electrical components and further cause secondary thermal runaway, which is not conducive to improving the overall safety performance of the battery pack and makes the battery pack unsafe.

[0046] Based on the above considerations, in order to solve the technical problem of low safety of battery packs existing in the prior art, the present application provides a battery pack, including a battery module and a bracket, the battery module including at least one row of battery cell units, each row of battery cell units including a plurality of battery cells arranged side by side in the same direction, and the explosion-proof valves and electrode poles of the battery cells are respectively located on both sides of the axial direction of the battery cells; the battery module is laterally mounted on the bracket, and an exhaust area and an electrical area are respectively formed on both sides of the bracket along the axial direction of the battery cells.

[0047] In the technical solution of the embodiment of the present application, the explosion-proof valves and electrode poles of the battery cells are respectively located on both sides of the axial direction of the battery cells, and the multiple battery cells in each row of battery cell units are arranged side by side in the same direction, so that all the explosion-proof valves of the battery module are located in the exhaust area, the electrode poles of the battery cells in the battery module and the electrical components for electrically connecting the electrode poles are located in the electrical area, the exhaust area and the electrical area are respectively located on both sides of the bracket along the axial direction of the battery cells, so that the exhaust channel and the electrical components in the battery module are separated, realizing thermoelectric separation, when thermal runaway occurs in the battery cell, the electrolyte or gas inside the battery cell is not easily sprayed on the electrical components after being discharged from the explosion-proof valve, and will not cause secondary thermal runaway, thereby improving the safety of the battery pack.

[0048] The battery pack of the present application is suitable for power batteries, energy storage batteries, electronic devices or mechanical devices.

[0049] The technical solution of the present application is described in detail below in conjunction with the accompanying drawings.

[0050] Please refer to Figure 1 and Fig.12 The embodiment of the present application provides a battery pack, including a battery module 1 and a bracket 2, the battery module 1 includes at least one row of battery cell units 10, each row of battery cell units 10 includes a plurality of battery cells 11 arranged side by side in the same direction, and the explosion-proof valve 113 and the electrode pole 110 of the battery cell 11 are respectively located on both sides of the axial direction of the battery cell 11; the battery module 1 is transversely mounted on the bracket 2, and an exhaust area 5 and an electrical area 6 are respectively formed on both sides of the bracket 2 along the axial direction of the battery cell 11.

[0051] Among them, each row of battery cell units 10 includes a plurality of battery cells 11 arranged side by side in the same direction, which can be understood as follows: the explosion-proof valves 113 of all battery cells 11 in each row of battery cell units 10 are located on the same side, and the electrode poles 110 of all battery cells 11 are located on the other side, forming a row of battery cell units 10 with their central axes in the same plane. The battery module 1 is horizontally mounted on the bracket 2, which can be understood as follows: the battery cells 11 in the battery module 1 are mounted on the bracket 2 in a manner such that their central axes are horizontal, such as Figure 1 or Fig.12 The exhaust area 5 may be an exhaust passage for exhausting gas when thermal runaway occurs, and the electrical area 6 may be an installation area for electrical components.

[0052] In the technical solution of the embodiment of the present application, the explosion-proof valve 113 and the electrode pole 110 of the battery cell 11 are respectively located on both sides of the axial direction of the battery cell 11, and the multiple battery cells 11 of each row of battery cell units 10 are arranged side by side in the same direction, so that all the explosion-proof valves 113 of the battery module 1 can be located in the exhaust area 5, the electrode pole 110 of the battery cell 11 in the battery module 1 and the electrical components for electrically connecting the electrode pole 110 are located in the electrical area 6, the exhaust area 5 and the electrical area 6 are respectively located on both sides of the bracket 2 along the axial direction of the battery cell 11, so that the exhaust channel and the electrical components in the battery module 1 are separated, and thermal and electrical separation is achieved. When the battery cell 11 has thermal runaway, the electrolyte or gas inside the battery cell 11 is not easily sprayed on the electrical components after being discharged from the explosion-proof valve 113, and secondary thermal runaway will not occur, thereby improving the safety of the battery pack.

[0053] In some embodiments, reference Figure 4 and Figure 5 , the battery cell 11 of the embodiment of the present application may be a cylindrical battery cell. The electrode column 110 includes a positive electrode column 111 and a negative electrode column 112. The positive electrode column 111 is arranged at the center of one end of the cylindrical battery cell, and the negative electrode column 112 is arranged around the positive electrode column 111, so that the positive electrode column 111 and the negative electrode column 112 are located at the same end of the cylindrical battery cell. Please refer to Figure 5 The explosion-proof valve 113 is located at the other end of the cylindrical battery cell along the axis, so that the explosion-proof valve 113 and the electrode pole 110 are respectively arranged at the two ends of the axial direction of the cylindrical battery cell.

[0054] In some embodiments, please refer to Figure 3 , Fig.10 , Fig.11 or Fig.15 , Fig.16 The bracket 2 includes a first side plate 22 and a second side plate 21. The first side plate 22 is provided with a first through hole 220 at a position corresponding to the electrode pole 110 of the battery cell 11. The first through hole 220 is provided with a first limiting groove 221 on the side facing the battery cell 11, and the first through hole 220 is provided with a first clearance hole 222 on the side facing away from the battery cell 11; the second side plate 21 is provided with a second through hole 210 at a position corresponding to the explosion-proof valve 113 of the battery cell 11, and the second through hole 210 is provided with a second limiting groove 215 on the side facing the battery cell 11, and the second through hole 210 is provided with a second clearance hole 214 on the side facing away from the battery cell 11.

[0055] Among them, the first side plate 22 and the second side plate 21 are plate-shaped structures for limiting the axial sides of the battery cell 11 respectively. The first through hole 220 is a through hole structure provided on the first side plate 22 for installing and avoiding the electrode pole 110. The inner diameter of the first limiting groove 221 is larger than the inner diameter of the first clearance hole 222, and the first limiting groove 221 is coaxially arranged with the first clearance hole 222, so that the end of the battery cell 11 with the electrode pole 110 can be limited in the first limiting groove 221 and the electrode pole 110 is exposed through the first clearance hole 222 to be electrically connected to the sampling connection component 602. The second through hole 210 is a through hole structure provided on the second side plate 21 for installing and avoiding the explosion-proof valve 113. The inner diameter of the second limiting groove 215 is greater than the inner diameter of the second clearance hole 214, and the second limiting groove 215 is coaxially arranged with the second clearance hole 214, so that the end of the battery cell 11 with the explosion-proof valve 113 can be limited in the second limiting groove 215 and exposed to communicate with the outside through the second clearance hole 214. The inner diameters of the first limiting groove 221 and the second limiting groove 215 can correspond to the outer diameters of the ends of the battery cell 11, respectively.

[0056] In the technical solution of the embodiment of the present application, through the above arrangement, the end of the electrode column 110 of the battery cell 11 can be limited in the first limiting groove 221 and exposed through the first clearance hole 222 (such as Figure 8 ) is electrically connected to the sampling connection assembly 602. The end of the battery core 11 having the explosion-proof valve 113 can be limited in the second limiting groove 215 and exposed through the second clearance hole 214 (such as Fig. 9 ) is connected to the outside. Thus, both ends of the battery cell 11 are stably positioned on the bracket 2, and the exhaust area 5 and the electrical area 6 are separately arranged to achieve thermal and electrical separation.

[0057] In some embodiments, please refer to Fig.11 or Fig.16 The electrical area 6 is provided with a sampling connection component 602 electrically connected to the electrode pole 110.

[0058] Among them, the sampling connection component 602 can be understood as a CCS component, which is a component that electrically connects the electrode poles 110 of multiple battery cells 11 and collects the sampling signal of each battery cell 11, including a bus, a connecting piece and a signal sampling harness. The sampling signal can be an electrical signal that characterizes the working parameters of the battery module 1 or the battery cell 11, such as: voltage signal, temperature signal, internal resistance signal, etc.

[0059] In the technical solution of the embodiment of the present application, the above configuration is used to facilitate electrical connection of the battery cell 11 through the sampling connection component 602 , and signal sampling is performed on each battery cell 11 .

[0060] In some embodiments, please refer to Figure 1 and Fig.12 The battery pack further includes: a shell 3 and a pressure relief valve 4 , the shell 3 is provided with a space for accommodating the bracket 2 , and the bracket 2 is arranged in the shell 3 ; the pressure relief valve 4 is arranged on the shell 3 corresponding to the exhaust area 5 .

[0061] The housing 3 is a component for accommodating the bracket 2 and the battery module 1 .

[0062] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, the bracket 2 and the battery module 1 are enclosed by the shell 3 to form an integral battery pack, and the pressure relief valve 4 is arranged corresponding to the exhaust area 5, so that the high-temperature and high-pressure gas discharged through the exhaust area 5 can be discharged from the pressure relief valve 4 in time, and it is not easy to make it flow freely in the shell 3 and affect the sampling connection component 602 in the electrical area 6.

[0063] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3 The battery pack includes two brackets 2 that are arranged opposite to each other, wherein the second side plates 21 of the two brackets 2 are arranged opposite to each other, the exhaust area 5 is formed between the two second side plates 21 that are arranged opposite to each other, and the electrical area 6 is formed between the first side plate 22 and the shell 3.

[0064] Among them, the relative arrangement of the second side plates 21 of the two brackets 2 can be understood as: the second side plates 21 of the two brackets 2 are connected so that the explosion-proof valves 113 of the battery modules 1 located in the two brackets 2 are relatively arranged, and the electrode poles 110 of the battery modules 1 are respectively arranged toward the side walls of the shell 3.

[0065] In the technical solution of the embodiment of the present application, through the above-mentioned setting, the battery pack includes two brackets 2 arranged oppositely, the second side plates 21 of the two brackets 2 are arranged oppositely, the exhaust zone 5 is formed between the two second side plates 21 arranged oppositely, and the electrical zone 6 is formed between the first side plate 22 and the shell 3. So that multiple battery modules 1 can be installed in the shell 3 at the same time, and the energy density of the battery can be improved. At the same time, the explosion-proof valves 113 of the battery modules 1 in the two brackets 2 can be arranged oppositely and facing the exhaust zone 5, and the high-temperature and high-pressure gas discharged by the explosion-proof valve 113 during thermal runaway can be discharged in time through the exhaust zone 5, while the electrode poles 110 of the battery modules 1 in the two brackets 2 are facing the side wall of the shell 3, so that the electrical zone 6 is formed between the first side plate 22 and the shell 3, and is arranged away from the exhaust zone 5. When thermal runaway occurs, it is not easily affected by the discharged electrolyte or high-temperature and high-pressure gas, and it is not easy to cause secondary thermal runaway.

[0066] In some embodiments, please refer to Fig. 9 and Fig.10When the second side plates 21 of the two brackets 2 are arranged opposite to each other, the second side plates 21 are respectively provided with first flanges 211 on both sides along the height direction thereof, and a second flange 212 is provided at one end of the second side plates 21 along the length direction thereof. The second side plates 21 of the two brackets 2 are arranged opposite to each other so that the exhaust area 5 is formed between the first flange 211 and the second flange 212, and is closed at the end of the second flange 212 and is open at the end away from the second flange 212.

[0067] The first flange 211 and the second flange 212 may be structures that protrude outward from the surface of the second side plate 21. The first flange 211 and the second flange 212 protrude from the second side plate 21 by the same length. The first flange 211 and the second flange 212 may be an integrated structure with the second side plate 21. Both ends of the second flange 212 are connected to the upper and lower first flanges 211, respectively.

[0068] In the technical solution of the embodiment of the present application, through the above-mentioned setting, the two oppositely arranged second side panels 21 are connected by the first flange 211 and the second flange 212, so that the exhaust area 5 can be formed between the first flange 211 and the second flange 212 of the two oppositely arranged second side panels 21, and one end of the exhaust area 5 is closed by the second flange 212, so that when thermal runaway occurs, the high-temperature and high-pressure gas in the exhaust area 5 can be discharged in the direction away from the second flange 212.

[0069] In some embodiments, the pressure relief valve 4 is disposed at an end opening of the shell 3 close to the exhaust area 5 away from the second protrusion 212 , so that the high-temperature and high-pressure gas in the exhaust area 5 flows out in a direction away from the second protrusion 212 and is discharged from the battery pack from the pressure relief valve 4 .

[0070] In some embodiments, please refer to Figure 3 and Figure 6 When two rows of battery cells 10 are arranged in the bracket 2 along the height direction of the bracket 2, a third flange 213 is further arranged between the two first flanges 211 of the second side plate 21 so as to form two exhaust channels on the upper and lower sides of the third flange 213 in the exhaust area 5. The third flange 213 is arranged parallel to the first flange 211, and the length of the third flange 213 protruding from the surface of the second side plate 21 is the same as the length of the first flange 211 and the second flange 212 protruding from the surface of the second side plate 21. One end of the third flange 213 is connected to the second flange 212, and the other end of the third flange 213 extends in a direction away from the second flange 212 and is perpendicular to the second flange 212. In some embodiments, the third flange 213 is provided with a notch 216 at the end close to the pressure relief valve 4, and the notch 216 allows the upper and lower exhaust channels to be connected.

[0071] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, when two upper and lower rows of battery cell units 10 are arranged in the bracket 2 along the height direction of the bracket 2, the second side panels 21 of the two brackets 2 are relatively arranged and connected, and independent exhaust channels can be formed above and below the third convex edge 213. Each exhaust channel passes through the explosion-proof valve 113 of each battery cell 11 of each row of battery cell units 10, and is connected at the notch 216 near the pressure relief valve 4, so that each battery cell 113 can be discharged from the exhaust channel and depressurized in time through the pressure relief valve 4.

[0072] In some embodiments, please refer to Fig. 9 , the first side plate 22 and the second side plate 21 are fixedly connected by a connecting column 24. The two ends of the connecting column 24 are respectively fixed to the first side plate 22 and the second side plate 21 by fasteners 241 such as bolts, so that the first side plate 22 and the second side plate 21 of a bracket 2 can be fixed together. In some embodiments, the connecting column 24 is arranged near the outer edge of the first side plate 22 and the second side plate 21, for example, it can be arranged on the upper side, the lower side along the height direction and / or the front side and the rear side along the length direction of the bracket 2, so that it is not easy to hinder the installation of the battery cell 11.

[0073] In some embodiments, please refer to Figure 6 and Figure 7 When the second side plates 21 of the two brackets 2 are arranged opposite to each other, an isolation plate 23 is provided on the outer side of the second clearance hole 214 of the second side plate 21 , and a thinning area 231 is provided on the isolation plate 23 at a position facing the explosion-proof valve 113 of the battery cell 11 .

[0074] The isolation plate 23 is arranged in close contact with the bracket 2. The isolation plate 23 may be a mica plate. The thickness of the isolation plate 23 is less than the length of the first flange 211, the second flange 212, or the third flange 213 protruding from the second side plate 21. The thinning area 231 is a region with a thinner thickness relative to other positions of the isolation plate 23. The thinning area 231 may be a circular structure.

[0075] In the technical solution of the embodiment of the present application, through the above-mentioned setting, when the second side plates 21 of the two brackets 2 are relatively arranged, the isolation plate 23 can isolate the explosion-proof valves 113 of the two relatively arranged rows of battery cell units 10, so that the explosion-proof valves 113 of the two rows of battery cell units 10 will not affect each other. On the other hand, the setting of the thinned area 231 of the isolation plate 23 can break through the thinned area 231 of the isolation plate 23 in time when thermal runaway occurs in the battery cell 11, so as to discharge the gas into the exhaust channel in time.

[0076] In some embodiments, please refer to Fig.10 When the second side plates 21 of the two brackets 2 are arranged opposite to each other, an insulating layer 601 is provided on the outer side of the sampling connection assembly 602 .

[0077] The insulating layer 601 is disposed between the sampling connection assembly 602 and the side wall of the housing 3 .

[0078] In the technical solution of the embodiment of the present application, an insulating layer 601 is provided on the outer side of the sampling connection component 602 , and the insulating layer 601 insulates between the sampling connection component 602 and the side wall of the housing 3 , so as to achieve insulation between the sampling connection component 602 and the housing 3 .

[0079] In some embodiments, please refer to Figure 1 A fixing plate 25 is provided at at least one end of the bracket 2 along the length direction thereof. The fixing plate 25 connects the ends of the first side plate 22 and the second side plate 21. The fixing plate 25 is provided at least at one end of the bracket 2 away from the pressure relief valve 4. A battery management system 9 is fixed on the fixing plate 25 at the end of the bracket 2 away from the pressure relief valve 4. The battery management system 9 is a BMS, and the battery management system 9 can be connected to the sampling connection assembly 602.

[0080] In the technical solution of the embodiment of the present application, the battery management system 9 is arranged at one end away from the pressure relief valve 4, so that it is not easily affected by the high-temperature and high-pressure gas flowing from the exhaust area 5 toward the pressure relief valve 4, and is not easy to cause secondary thermal runaway.

[0081] In other embodiments of the present application, please refer to Figures 12 to 16 The battery pack includes two brackets 2 arranged opposite to each other, the first side plates 22 of the two brackets 2 are arranged opposite to each other, the electrical area 6 is formed between the two first side plates 22 arranged opposite to each other, and the exhaust area 5 is formed between the second side plate 21 and the shell 3.

[0082] The first side plates 22 of the two brackets 2 are arranged relative to each other, which can be understood as: the first side plates 22 of the two brackets 2 are arranged close to each other, so that the electrode poles 110 of the battery modules 1 located on the two brackets 2 are arranged relative to each other. The explosion-proof valve 113 of the battery module 1 is arranged toward the side wall of the shell 3.

[0083] In the technical solution of the embodiment of the present application, through the above arrangement, the battery pack includes two brackets 2 arranged opposite to each other, so that multiple battery modules 1 can be installed simultaneously in the housing 3 to improve the energy density of the battery. The explosion-proof valves 113 of the battery modules 1 in the two brackets 2 face the exhaust area 5 between the second side plate 21 and the housing 3, and the electrode poles 110 of the battery modules 1 in the two brackets 2 are arranged opposite to each other, so that the electrical area 6 is formed between the two first side plates 22, away from the exhaust area 5, and when thermal runaway occurs, it is not easy to be affected by the discharged electrolyte or high temperature and high pressure to cause secondary thermal runaway.

[0084] In some embodiments, please refer to Fig.14 and Fig.15When the first side plates 22 of the two brackets 2 are arranged opposite to each other, the sampling connection assembly 602 is connected to the outer side of the electrode pole 110 of the battery cell 11 .

[0085] In some embodiments, please refer to Fig.14 and Fig.15 When the first side plates 22 of the two brackets 2 are arranged opposite to each other, a spacer 7 is provided between the first side plates 22 arranged opposite to each other.

[0086] The spacer 7 may be an insulating member.

[0087] In the technical solution of the embodiment of the present application, the above arrangement is adopted so that the electrode poles 110 of the relatively arranged battery modules 1 and the sampling connection assembly 602 for electrically connecting the electrode poles 110 can be insulated and separated by the partition 7 to avoid mutual influence.

[0088] In some embodiments, when the first side plates 22 of the two brackets 2 are arranged opposite to each other, a support plate 8 is arranged at the bottom of the battery module 1 along the height direction, and the first side plate 22 , the second side plate 21 and the partition 7 are all fixed to the support plate 8 .

[0089] The support plate 8 may be a plate-shaped structure extending from the second side plate 21 of one of the brackets 2 to the second side plate 21 of the other bracket 2 .

[0090] In the technical solution of the embodiment of the present application, a support plate 8 is provided to fix the partition 7, the first side plate 22 and the second side plate 21, so that the battery module 1 and the bracket 2 can be stably fixed in the shell 3.

[0091] In some embodiments, please refer to Fig.15 A slot 801 for supporting the first side plate 22 or the second side plate 21 is provided on the support plate 8, so that the bottom of the first side plate 22 and the second side plate 21 can be clamped in the slot 801. In some embodiments, the spacer 7 and the support plate 8 are an integrated structure.

[0092] In some embodiments, when the first side plates 22 of the two brackets 2 are arranged opposite to each other, the pressure relief valve 4 is arranged close to the two side edges of the shell 3 so that the pressure relief valve 4 corresponds to the exhaust area 5 formed between the second side plate 21 and the shell 3.

[0093] In a second aspect, the present application further provides an electric device, characterized in that it includes the battery pack described in the first aspect. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0094] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that: include: A battery module (1), the battery module (1) comprising at least one row of battery cell units (10), each row of the battery cell units (10) comprising a plurality of battery cells (11) arranged side by side in the same direction, and the explosion-proof valve (113) and the electrode pole (110) of the battery cell (11) are respectively located on both sides of the axial direction of the battery cell (11); A bracket (2), the battery module (1) is transversely mounted on the bracket (2), and an exhaust area (5) and an electrical area (6) are respectively formed on both sides of the bracket (2) along the axial direction of the battery cell (11).

2. The battery pack according to claim 1, characterized in that: The bracket (2) comprises a first side plate (22) and a second side plate (21); the first side plate (22) is provided with a first through hole (220) at a position corresponding to the electrode pole (110) of the battery cell (11); the first through hole (220) is provided as a first limiting groove (221) on a side facing the battery cell (11); and the first through hole (220) is provided as a first clearance hole (222) on a side facing away from the battery cell (11); The second side plate (21) is provided with a second through hole (210) at a position corresponding to the explosion-proof valve (113) of the battery cell (11); the second through hole (210) is provided as a second limiting groove (215) on a side facing the battery cell (11); and the second through hole (210) is provided as a second clearance hole (214) on a side facing away from the battery cell (11).

3. The battery pack according to claim 1, characterized in that: The electrical area (6) is provided with a sampling connection assembly (602) electrically connected to the electrode pole (110).

4. The battery pack according to any one of claims 2 to 3, characterized in that: Also includes: A housing (3) is provided with a space for accommodating the bracket (2), and the bracket (2) is arranged in the housing (3); A pressure relief valve (4), the pressure relief valve (4) being arranged on the housing (3) corresponding to the exhaust area (5).

5. The battery pack according to claim 4, characterized in that: The battery pack comprises two brackets (2) arranged opposite to each other, wherein the second side plates (21) of the two brackets (2) are arranged opposite to each other, the exhaust area (5) is formed between the two second side plates (21) arranged opposite to each other, and the electrical area (6) is formed between the first side plate (22) and the housing (3). or, The first side plates (22) of the two brackets (2) are arranged opposite to each other, the electrical area (6) is formed between the two first side plates (22) arranged opposite to each other, and the exhaust area (5) is formed between the second side plate (21) and the shell (3).

6. The battery pack according to claim 5, characterized in that: When the second side plates (21) of the two brackets (2) are arranged opposite to each other, the second side plates (21) are respectively provided with first convex edges (211) on both sides along the height direction thereof, and a second convex edge (212) is provided at one end of the second side plate (21) along the length direction thereof, and the second side plates (21) of the two brackets (2) are arranged opposite to each other so that the exhaust area (5) is formed between the first convex edge (211) and the second convex edge (212), and is closed at the end of the second convex edge (212) and is open at the end away from the second convex edge (212); The first side plate (22) and the second side plate (21) are fixedly connected via a connecting column (24).

7. The battery pack according to claim 6, characterized in that: An isolation plate (23) is provided on the outer side of the second clearance hole (214) of the second side plate (21), and a thinning area (231) is provided on the isolation plate (23) at a position facing the explosion-proof valve (113) of the battery cell (11).

8. The battery pack according to claim 6, characterized in that: An insulating layer (601) is provided on the outer side of the sampling connection assembly (602).

9. The battery pack according to claim 5, characterized in that: When the first side plates (22) of the two brackets (2) are arranged opposite to each other, a spacer (7) is provided between the first side plates (22) arranged opposite to each other. A support plate (8) is provided at the bottom of the bracket (2) along its height direction, and the first side plate (22), the second side plate (21) and the partition (7) are all fixed to the support plate (8).

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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