Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment. The battery pack provided by the embodiment of the invention comprises a battery module, a connecting piece assembly and a wire harness plate assembly, the battery module comprises a plurality of battery cells. The connecting piece assembly is used for connecting a plurality of battery cells and is arranged on the side edges of a plurality of anti-explosion valves of the battery cells. The wire harness plate assembly is arranged on the battery module, is connected with the connecting piece assembly, and is positioned on one side, far away from the plurality of anti-explosion valves, of the connecting piece assembly. Therefore, when thermal runaway occurs, the electrolyte can be prevented from being directly splashed onto the wire harness plate assembly to cause wire harness fusion and further aggravate thermal runaway, and the safety and the reliability of the battery module are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] With the rapid development of the new energy industry, energy storage batteries are being used in a wider range of fields. For example, in power grid dispatching, home energy storage, or industrial and commercial energy storage applications, energy storage batteries play an important role. In the development of energy storage battery technology, in addition to improving the energy density of energy storage batteries, the safety of energy storage batteries is also an issue that cannot be ignored. Therefore, how to improve the safety of energy storage batteries is an issue that needs to be urgently addressed in energy storage battery technology. Summary of the invention

[0003] The embodiments of the present application provide a battery pack and an electrical device to solve at least one of the above-mentioned technical problems.

[0004] The battery pack of the embodiment of the present application includes:

[0005] A battery module, wherein the battery module comprises a plurality of battery cells;

[0006] A connecting piece assembly, the connecting piece assembly is used to connect the multiple battery cells, and the connecting piece assembly is arranged on the sides of the multiple explosion-proof valves of the multiple battery cells;

[0007] A wiring harness plate assembly is disposed on the battery module, the wiring harness plate assembly is connected to the connecting plate assembly, and is located on a side of the connecting plate assembly away from the plurality of explosion-proof valves.

[0008] In the battery pack of the embodiment of the present application, the wiring harness plate assembly is arranged in the battery module, and the wiring harness plate assembly is connected to the connecting plate assembly and is located on the side of the connecting plate assembly away from the multiple explosion-proof valves. In this way, when thermal runaway occurs, it is possible to prevent the electrolyte from directly splashing onto the wiring harness plate assembly, causing the wiring harness to melt, further aggravating the thermal runaway, and improving the safety and reliability of the battery module.

[0009] In some embodiments, the number of the connecting plate assemblies and the wiring harness plate assemblies are both two, the two connecting plate assemblies are respectively located on both sides of the multiple explosion-proof valves, and the two wiring harness plate assemblies are respectively located on the side of the corresponding two connecting plate assemblies away from the multiple explosion-proof valves.

[0010] In the above technical solution, the two connecting plate assemblies are respectively located on both sides of the multiple explosion-proof valves, and the two wiring harness plate assemblies are respectively located on the side of the corresponding two connecting plate assemblies away from the multiple explosion-proof valves. In this way, the wiring harness in the wiring harness plate assembly connected to one connecting plate assembly can be arranged along one side in the width direction of the battery module, and the wiring harness in the wiring harness plate assembly connected to another connecting plate assembly can be arranged along the other side in the width direction of the battery module, and both are routed away from the explosion-proof valves of the battery cells. When thermal runaway occurs, due to the increased distance between the wiring harness and the explosion-proof valve, it is possible to prevent the electrolyte from directly splashing onto the wiring harness, causing the wiring harness to melt, further aggravating thermal runaway, and improving the safety and reliability of the battery module.

[0011] In some embodiments, the plurality of battery cells are arranged along the length direction of the battery module;

[0012] The connecting piece assembly includes a plurality of connecting pieces, which are arranged at intervals along the length direction of the battery module and are used to connect the plurality of battery cells;

[0013] The wiring harness board assembly includes a carrier plate and multiple groups of wiring harnesses. The carrier plate is arranged on a side of the battery module away from the battery pack bottom plate in the height direction. The multiple connecting plates are installed on the carrier plate, and the multiple groups of wiring harnesses are electrically connected to the multiple connecting plates respectively.

[0014] In the above technical solution, multiple battery cells are arranged along the length direction of the battery module, and the positive and negative electrodes of the multiple battery cells can be respectively located at both ends of the width direction of the battery module. Correspondingly, multiple connecting pieces can be arranged near the edge of the battery module along the width direction and spaced apart in the length direction, so that the connecting pieces can connect two adjacent battery cells.

[0015] In certain embodiments, the wiring harness plate assembly further includes a side plate, which is connected to the supporting plate and is located on a side of the battery module along a width direction, and is used to fix the multiple groups of wiring harnesses.

[0016] In the above technical solution, the side panels are used to fix multiple sets of wiring harnesses, and the wiring harnesses connected to the connecting plates are routed in a direction away from the explosion-proof valve to the side panels for fixation, so that the routing path of the wiring harnesses is away from the explosion-proof valve of the battery module.

[0017] In certain embodiments, the side panel comprises:

[0018] A fixing portion, the fixing portion is mounted on the carrying plate, the fixing portion is formed with a harness groove extending along the length direction of the battery module, and the harness groove is used to fix the multiple sets of harnesses;

[0019] A supporting portion is connected to the fixing portion and extends from the fixing portion toward the battery pack bottom plate along a height direction of the battery module.

[0020] In the above technical solution, the wire harness connected to the connecting piece can be routed to the wire harness groove in the fixing part for fixing. The supporting part is connected to the fixing part and extends from the fixing part along the height direction of the battery module toward the battery pack bottom plate. In this way, the supporting part can support the suspended fixing part, that is, provide support for the wire harness groove, so that the structure of the battery pack is more stable.

[0021] In some embodiments, the support portion is a whole support plate; or

[0022] The support portion includes a plurality of sub-support plates arranged at intervals along the length direction of the battery module.

[0023] In the above technical solution, the support part can be a whole support plate, so that the structural strength is higher and the fixing part can be better supported. Alternatively, the support part can include a plurality of sub-support plates arranged at intervals along the length direction of the battery module, so that the support force for the fixing part is guaranteed while saving consumables of the support part.

[0024] In some embodiments, the support portion is a hollow structure, and an air flow channel connected along the length direction of the battery pack is formed inside the support portion.

[0025] In the above technical solution, the support part can be set as a hollow structure. The hollow structure allows an air flow channel to be formed inside the support part along the length direction of the battery pack. In this way, consumables of the support part can be further saved and costs can be reduced. At the same time, the air flow in the battery pack can flow in the formed air flow channel to better dissipate heat.

[0026] In some embodiments, the battery pack further comprises:

[0027] An external shell, wherein the external shell is formed with a receiving space, the battery module is mounted in the receiving space, and the air flow channel is communicated with the receiving space, the external shell comprising a first panel and a second panel located on opposite sides of the battery module in a length direction;

[0028] The airflow generating member is arranged on the first panel, and the second panel is provided with a through hole connecting the accommodating space with the outside of the external shell.

[0029] In the above technical solution, the airflow generating member cooperates with the through hole to dissipate heat from the battery cell in an air-cooling manner. When the airflow generated by the airflow generating member flows to the support portion, the airflow can flow not only on both sides of the support portion, but also in the airflow channel inside the support portion, thereby further improving the heat dissipation effect of the battery cell.

[0030] In some embodiments, the fixing portion is further provided with a plurality of limiting holes communicating with the wiring harness groove, the plurality of limiting holes respectively corresponding to the plurality of wiring harness groups, one end of each wiring harness group is electrically connected to the connecting piece, and the other end passes through the limiting hole and is accommodated in the wiring harness groove;

[0031] The plurality of limiting holes are used to respectively limit the movement of the plurality of wiring harnesses along the length direction of the battery module.

[0032] In the above technical solution, each limiting hole can limit the movement of a corresponding set of wiring harnesses along the length direction of the battery module, so as to avoid the wear of the wiring harnesses due to movement, and reduce the risk of short circuit or other safety problems.

[0033] In certain embodiments, the fixing portion is further provided with a plurality of limit members, and the plurality of limit members are spaced apart and distributed in the wiring harness groove, and the plurality of limit members are used to limit the movement of the plurality of wiring harness groups along the width direction of the battery module.

[0034] In the above technical solution, multiple limiters can limit the movement of multiple wire harnesses along the width direction of the battery module, so as to avoid the wear of the wire harnesses due to movement and reduce the risk of short circuit or other safety problems.

[0035] In some embodiments, the side plate further includes a cover portion, which is rotatably connected to the fixing portion via a rotating shaft, an extension direction of the rotating shaft is the same as a length direction of the battery module, and the cover portion is used to cover the wiring harness slot.

[0036] In the above technical solution, the setting of the rotating shaft allows the cover part to be opened and closed more conveniently. After the wiring harness is assembled, the cover part is in a closed state, so that the electrolyte can be further prevented from spraying onto the wiring harness.

[0037] In some embodiments, the wiring harness plate assembly also includes a baffle, which is installed on the supporting plate and has a plurality of snap-in structures provided on the baffle. The plurality of snap-in structures respectively correspond to the plurality of wiring harness groups, and one end of each wiring harness group close to the connecting plate is snapped to the snap-in structure.

[0038] In the above technical solution, a baffle is arranged on the carrier plate, and a plurality of buckle structures are arranged on the baffle, and the wire harness can be buckled in the buckle structure. In this way, the position of the wire harness can be limited, and then when dispensing or welding, multiple wire harnesses can be welded at one time without tools or holding the wire harness by hand, which greatly improves the welding efficiency of the wire harness and the connecting piece and facilitates process production.

[0039] The electrical equipment of the embodiment of the present application includes the battery pack of any one of the above embodiments.

[0040] In the battery pack and electrical equipment of the embodiment of the present application, the wiring harness plate assembly is arranged in the battery module, and the wiring harness plate assembly is connected to the connecting plate assembly and is located on the side of the connecting plate assembly away from the plurality of explosion-proof valves. In this way, when thermal runaway occurs, it is possible to prevent the electrolyte from directly splashing onto the wiring harness plate assembly, causing the wiring harness to melt, further exacerbating the thermal runaway, and improving the safety and reliability of the battery module.

[0041] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. 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 the structures shown in these drawings without creative work. Among them:

[0043] Figure 1 is a schematic diagram of the structure of a battery pack according to certain embodiments of the present application;

[0044] Figure 2 is a schematic diagram of the structure of two wiring harness plate assemblies of certain embodiments of the present application;

[0045] Figure 3 It is a schematic structural diagram of a wiring harness plate assembly connected to a connecting piece assembly in certain embodiments of the present application;

[0046] Figure 4 is a schematic diagram of the airflow direction of the airflow generating member of certain embodiments of the present application working in the exhaust mode;

[0047] Figure 5 is a schematic diagram of the airflow direction of the airflow generating member of certain embodiments of the present application working in the air supply mode;

[0048] Figure 6 is a partial enlarged structural schematic diagram of a battery pack in certain embodiments of the present application;

[0049] Figure 7 It is a module schematic diagram of an electrical equipment in certain embodiments of the present application.

[0050] Description of reference numerals:

[0051] Battery pack 100, battery module 10, battery cell 11, explosion-proof valve 12, connecting plate assembly 20, connecting plate 21, wiring harness plate assembly 30, bearing plate 31, wiring harness 32, side plate 33, fixing portion 331, wiring harness groove 3311, limiting hole 3312, limiting member 3313, supporting portion 332, sub-support plate 3321, air flow channel 3322, cover portion 333, rotating shaft 334, baffle 34, snap-on structure 341, external shell 40, accommodating space 41, first panel 42, second panel 43, through hole 431, air flow generating member 50, battery pack bottom plate 60, and electrical equipment 1000. DETAILED DESCRIPTION

[0052] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0053] See also Figures 1 to 4 , an embodiment of the present application provides a battery pack 100. The battery pack 100 includes a battery module 10, a connecting plate assembly 20 and a wiring harness plate assembly 30. The battery module 10 includes a plurality of battery cells 11. The connecting plate assembly 20 is used to connect the plurality of battery cells 11, and the connecting plate assembly 20 is arranged on the side of the plurality of explosion-proof valves 12 of the plurality of battery cells 11. The wiring harness plate assembly 30 is arranged in the battery module 10, and the wiring harness plate assembly 30 is connected to the connecting plate assembly 20, and is located on the side of the connecting plate assembly 20 away from the plurality of explosion-proof valves 12.

[0054] In the battery pack 100 of the embodiment of the present application, the wiring harness plate assembly 30 is disposed on the battery module 10, and the wiring harness plate assembly 30 is connected to the connecting plate assembly 20, and is located on the side of the connecting plate assembly 20 away from the plurality of explosion-proof valves 12. In this way, when thermal runaway occurs, it is possible to prevent the electrolyte from directly splashing onto the wiring harness plate assembly 30, causing the wiring harness to melt, further exacerbating the thermal runaway, and improving the safety and reliability of the battery module 200.

[0055] Specifically, the battery pack 100 includes a battery module 10, a connecting plate assembly 20, and a wiring harness plate assembly 30. The number of the battery modules 10 can be one or more. The battery module 10 is a rectangular parallelepiped structure. The battery module 10 includes a plurality of battery cells 11 arranged side by side. The plurality of battery cells 11 can be arranged along the length direction of the battery module 10 (e.g. Figure 1The plurality of battery cells 11 are sequentially connected via the connecting sheet assembly 20.

[0056] Each battery cell 11 is provided with an explosion-proof valve 12, that is, the battery module 10 includes a plurality of explosion-proof valves 12, and the plurality of explosion-proof valves 12 are located along the height direction (such as Figure 1 The connecting sheet assembly 20 is arranged on the side of the plurality of explosion-proof valves 12, that is, arranged on the side of the plurality of battery cells 11 away from the battery pack bottom plate 60 along the height direction, close to the battery module 10 along the width direction (such as Figure 1 The edge position of the battery module 10 is in the Y-axis direction, and the overall extension direction is the length direction of the battery module 10.

[0057] The wiring harness plate assembly 30 is connected to the connecting plate assembly 20. For example, the wiring harness plate assembly 30 may include multiple sets of wiring harnesses 32, one end of the multiple sets of wiring harnesses 32 is used to connect to the connecting plate assembly 20, and the other end is used to connect to the battery management system (BMS). The wiring harness plate assembly 30 is installed on the battery module 10 and is located on the side of the connecting plate assembly 20 away from the multiple explosion-proof valves 12. Specifically, it can be partially located on the side of the connecting plate assembly 20 close to the battery cell 11 along the height direction (that is, between the connecting plate assembly 20 and the battery module 10), and partially located on the side of the battery module 10 along the width direction.

[0058] In the related art, the wiring harness plate is an integrated wiring harness plate, which is usually directly fixed on the side of multiple battery cells away from the bottom plate of the battery pack in the height direction. The wiring harness is led out from the fixing point of the wiring harness plate and then connected to the connecting piece. Multiple strands of wiring harness are wound into a bundle, routed near the explosion-proof valve of the battery cell, and finally led out from the front end of the battery module. In this case, when thermal runaway occurs, the high-temperature electrolyte sprays out from the explosion-proof valve and directly sprays on the wiring harness, causing the wiring harness shell to melt, thereby causing ignition between the wiring harnesses and igniting the battery module, further aggravating thermal runaway.

[0059] In the embodiment of the present application, the wiring harness plate assembly 30 is located on the side of the connecting plate assembly 20 away from the multiple explosion-proof valves 12, and the multiple groups of wiring harnesses 32 can be routed from the side of the connecting plate assembly 20 away from the multiple explosion-proof valves 12, for example, they can be arranged along the side of the width direction of the battery module 10, so as to be routed away from the explosion-proof valves 12 of the battery cell 11. In this way, when thermal runaway occurs, it is possible to prevent the electrolyte from directly splashing onto the wiring harness 32, causing the wiring harness 32 to melt, further aggravating the thermal runaway, and improving the safety and reliability of the battery module 200.

[0060] See also Figure 1 , Figure 2 and Figure 4In some embodiments, the number of the connecting piece assembly 20 and the number of the wiring harness plate assembly 30 are both two. The two connecting piece assemblies 20 are respectively located on both sides of the plurality of explosion-proof valves 12. The two wiring harness plate assemblies 30 are respectively located on the side of the corresponding two connecting piece assemblies 20 away from the plurality of explosion-proof valves 12.

[0061] Specifically, the number of connecting sheet assemblies 20 and wiring harness plate assemblies 30 corresponding to each battery module 10 is two, and one connecting sheet assembly 20 corresponds to one wiring harness plate assembly 30. The two connecting sheet assemblies 20 are respectively located on both sides of the plurality of explosion-proof valves 12, that is, the two connecting sheet assemblies 20 are respectively located at opposite ends of the width direction of the side of the battery module 10 away from the battery pack bottom plate 60 in the height direction, for example, at the edge positions of the opposite ends in the width direction.

[0062] The two wiring harness plate assemblies 30 are respectively located on the side of the corresponding two connecting plate assemblies 20 away from the multiple explosion-proof valves 12, and at least partially located on the side of the corresponding two connecting plate assemblies 20 close to the outside of the battery module 10 in the width direction. In this way, the wiring harness 32 in the wiring harness plate assembly 30 connected to one connecting plate assembly 20 can be arranged along one side in the width direction of the battery module 10, and the wiring harness 32 in the wiring harness plate assembly 30 connected to the other connecting plate assembly 20 can be arranged along the other side in the width direction of the battery module 10, and both are routed away from the explosion-proof valve 12 of the battery cell 11. When thermal runaway occurs, due to the increased distance between the wiring harness 32 and the explosion-proof valve 12, it is possible to prevent the electrolyte from directly splashing onto the wiring harness 32, causing the wiring harness 32 to melt, further aggravating the thermal runaway, and improving the safety and reliability of the battery module 200.

[0063] See also Figures 1 to 4 In some embodiments, the plurality of battery cells 11 are arranged along the length direction of the battery module 10. The connecting piece assembly 20 includes a plurality of connecting pieces 21, which are arranged at intervals along the length direction of the battery module 10 and are used to connect the plurality of battery cells 11. The wiring harness board assembly 30 includes a carrier plate 31 and a plurality of wiring harnesses 32, and the carrier plate 31 is arranged on a side of the battery module 10 away from the battery pack bottom plate 60 in the height direction. The plurality of connecting pieces 21 are mounted on the carrier plate 31, and the plurality of wiring harnesses 32 are electrically connected to the plurality of connecting pieces 21, respectively.

[0064] Specifically, in the battery module 10, multiple battery cells 11 are arranged along the length direction of the battery module 10, and the positive and negative electrodes of the multiple battery cells 11 can be respectively located at both ends of the width direction of the battery module 10. Correspondingly, multiple connecting pieces 21 can be arranged near the edge of the battery module 10 along the width direction and spaced apart in the length direction, so that the connecting piece 21 can connect two adjacent battery cells 11. Figure 1As shown, the positive and negative electrodes of two adjacent battery cells 11 are placed in opposite positions, and each connecting sheet 21 is used to connect the positive electrode of one battery cell 11 to the negative electrode of another battery cell 11 .

[0065] The wiring harness board assembly 30 includes a carrier plate 31 and a plurality of wiring harnesses 32. The carrier plate 31 is disposed on a side of the battery module 10 away from the battery pack bottom plate 60 in the height direction, and a plurality of connecting plates 21 are installed on the carrier plate 31. Specifically, a plurality of mounting slots may be provided on the carrier plate 31, and a plurality of connecting plates 21 are respectively installed in the plurality of mounting slots. In addition, a hook may be provided in the mounting slot of the carrier plate 31, and a hole corresponding to the hook may be provided on the connecting plate 21. The plurality of connecting plates 21 may be limited to the mounting slot of the carrier plate 31 by the cooperation of the hook and the hole, so as to prevent the connecting plate 21 from shaking in the mounting slot. The plurality of wiring harnesses 32 are respectively electrically connected to the plurality of connecting plates 21, and a group of wiring harnesses 32 corresponds to one connecting plate 21.

[0066] See also Figure 2 and Figure 3 In some embodiments, the wiring harness plate assembly 30 further includes a side plate 33 , which is connected to the supporting plate 31 and is located on the side of the battery module 10 along the width direction, and the side plate 33 is used to fix and support the plurality of wiring harnesses 32 .

[0067] Specifically, the side plate 33 is connected to the carrier plate 31 and is located on the side of the battery module 10 along the width direction. The side plate 33 is used to fix and support multiple sets of wire harnesses 32. The wire harnesses 32 connected to the connecting piece 21 are routed to the side plate 33 in a direction away from the explosion-proof valve 12 for fixing. In this way, the routing path of the wire harness 32 is away from the explosion-proof valve 12 of the battery module 10.

[0068] See also Figures 2 to 4 In some embodiments, the side plate 33 includes a fixing portion 331 and a supporting portion 332. The fixing portion 331 is mounted on the carrier plate 31, and the fixing portion 331 is formed with a harness groove 3311 extending along the length direction of the battery module 10, and the harness groove 3311 is used to fix multiple sets of harnesses 32. The supporting portion 332 is connected to the fixing portion 331 and extends from the fixing portion 331 along the height direction of the battery module 10 toward the battery pack bottom plate 60.

[0069] Specifically, the fixing portion 331 of the side plate 33 is mounted on the carrier plate 31, and the fixing portion 331 is formed with a harness groove 3311 extending along the length direction of the battery module 10, and the harness groove 3311 is used to fix multiple sets of harnesses 32, so that the harnesses 32 connected to the connecting piece 21 can be routed to the harness groove 3311 in the fixing portion 331 for fixing. Among them, multiple sets of harnesses 32 in the same harness plate assembly 30 can share one harness groove 3311.

[0070] It can be understood that since the fixing portion 331 is at least partially suspended outside the battery module 10, and the fixing portion 331 is provided with a harness groove 3311 to fix multiple sets of harnesses 32, in order to maintain the stability of the fixing portion 331, the side plate 33 can be provided with a support portion 332. The support portion 332 is connected to the fixing portion 331 and extends from the fixing portion 331 along the height direction of the battery module 10 toward the battery pack bottom plate 60. In this way, the support portion 332 can support the suspended fixing portion 331, that is, provide support for the harness groove 3311, so that the structure of the battery pack 100 is more stable.

[0071] See also Figure 2 and Figure 3 In some embodiments, the support portion 332 is a whole support plate; or the support portion 332 includes a plurality of sub-support plates 3321 spaced apart along the length direction of the battery module 10 .

[0072] Specifically, the support portion 332 may be a whole support plate, so that the structural strength is higher and the fixing portion 331 can be better supported. Alternatively, the support portion 332 may include a plurality of sub-support plates 3321 spaced apart along the length direction of the battery module 10, so that while the support force for the fixing portion 331 is ensured, consumables of the support portion 332 can also be saved. The number of sub-support plates 3321 can be set according to the width of the sub-support plates 3321 and the width of the fixing portion 331, and is not limited here. For example, Figure 2 As shown, the support portion 332 includes three sub-support plates 3321 arranged at intervals along the length direction of the battery module 10 .

[0073] See also Figure 2 and Figure 3 In some embodiments, the support portion 332 is a hollow structure, and an air flow channel 3322 is formed inside the support portion 332 and is connected along the length direction of the battery pack 100.

[0074] Specifically, the support portion 332 can be set to a hollow structure, and the hollow structure allows an air flow channel 3322 to be formed inside the support portion 332 along the length direction of the battery pack 100. In this way, not only can the consumables of the support portion 332 be saved and the cost can be reduced, but also the air flow in the battery pack 100 can circulate in the formed air flow channel 3322 to better dissipate heat and extend the service life of the battery pack 100.

[0075] See also Figure 1 and Figure 2In some embodiments, the battery pack 100 further includes an external shell 40 and an airflow generator 50. The external shell 40 is formed with a receiving space 41, the battery module 10 is installed in the receiving space 41, and the airflow channel 3322 is connected to the receiving space 41. The external shell 40 includes a first panel 42 and a second panel 43 located on opposite sides of the length direction of the battery module 10. The airflow generator 50 is disposed on the first panel 42, and the second panel 43 is provided with a through hole 431 connecting the receiving space 41 and the outside of the external shell 40.

[0076] Specifically, the outer shell 40 is formed with a accommodating space 41, and the battery module 10 is installed in the accommodating space 41. The connecting plate assembly 20 and the wiring harness plate assembly 30 arranged on the battery module 10 are also located in the accommodating space 41, and then the airflow channel 3322 formed by the support portion 332 can be connected to the accommodating space 41.

[0077] The outer shell 40 includes a first panel 42 and a second panel 43 located on opposite sides of the battery module 10 in the length direction. The airflow generating member 50 is disposed on the first panel 42, and the airflow generating member 50 can be a component that can generate airflow, such as a fan. The airflow generating member 50 can face the storage space 41 or face away from the storage space 41, so that the airflow generating member 50 works to generate airflow in the storage space 41, and the airflow can flow in the storage space 41. The second panel 43 is provided with a through hole 431 connecting the storage space 41 with the outside of the outer shell 40. Figure 1 As shown, the through hole 431 may be oval or circular. Of course, the through hole 431 may also be in other shapes, such as a strip, etc., which is not limited here.

[0078] The airflow generating member 50 can include two working modes, an exhaust mode and an air supply mode. The airflow generating member 50 cooperates with the through hole 431 to dissipate heat from the battery cell 11 in an air-cooling heat dissipation manner. When the airflow generating member 50 works in the exhaust mode, Figure 4 As shown, the air outside the battery pack 100 can enter the accommodating space 41 from the through hole 431 to form an airflow to dissipate heat to the battery cell 11, and then be discharged to the outside of the battery pack 100 through the airflow generating member 50. When the airflow generating member 50 works in the air supply mode, as shown in FIG. Figure 5 As shown, air outside the battery pack 100 can enter the accommodating space 41 from the airflow generating member 50 to form airflow to dissipate heat to the battery cells 11 , and then be discharged to the outside of the battery pack 100 through the through hole 431 .

[0079] When the airflow generated by the airflow generating member 50 flows to the support portion 332 , the airflow can not only flow on both sides of the support portion 332 , but also flow in the airflow channel 3322 inside the support portion 332 , thereby further improving the heat dissipation effect of the battery cell 11 .

[0080] See also Figure 3 In some embodiments, the fixing portion 331 is further provided with a plurality of limiting holes 3312 connected to the harness groove 3311, and the plurality of limiting holes 3312 respectively correspond to the plurality of harnesses 32. One end of each harness 32 is electrically connected to the connecting piece 21, and the other end passes through the limiting hole 3312 and is accommodated in the harness groove 3311. The plurality of limiting holes 3312 are used to respectively limit the movement of the plurality of harnesses 32 along the length direction of the battery module 10.

[0081] Specifically, a plurality of limiting holes 3312 correspond to a plurality of wire harnesses 32, respectively, and one limiting hole 3312 corresponds to a group of wire harnesses 32. One end of each group of wire harnesses 32 is electrically connected to a connecting piece 21. Among them, a group of wire harnesses 32 may include two lines, one line can be used to collect the voltage of the corresponding battery cell 11, and the other line can be used to collect the temperature of the corresponding battery cell 11. The other end of each group of wire harnesses 32 passes through the limiting hole 3312 and is accommodated in the wire harness groove 3311. Each limiting hole 3312 can limit the movement of a corresponding group of wire harnesses 32 along the length direction of the battery module 10. In this way, wear and tear of the wire harness 32 due to movement can be avoided, and the risk of short circuit or other safety problems can be reduced.

[0082] See also Figure 3 In some embodiments, the fixing portion 331 is further provided with a plurality of limit members 3313 , and the plurality of limit members 3313 are spaced apart and distributed in the wiring harness groove 3311 , and the plurality of limit members 3313 are used to limit the movement of the plurality of wiring harnesses 32 along the width direction of the battery module 10 .

[0083] Specifically, a plurality of stoppers 3313 are spaced apart in the harness groove 3311 along the length direction of the battery module 10, and the plurality of stoppers 3313 can limit the movement of the plurality of harnesses 32 along the width direction of the battery module 10. In this way, the harnesses 32 can be prevented from being worn due to movement, and the risk of short circuit or other safety problems can be reduced.

[0084] See also Figure 2 and Figure 3 In some embodiments, the side plate 33 further includes a cover portion 333, which is rotatably connected to the fixing portion 331 via a rotation shaft 334. The extension direction of the rotation shaft 334 is the same as the length direction of the battery module 10, and the cover portion 333 is used to cover the harness slot 3311.

[0085] Specifically, the cover plate portion 333 is rotatably connected to the fixing portion 331 through a rotating shaft 334. The extending direction of the rotating shaft 334 is the same as the length direction of the battery module 10, and the cover plate portion 333 can rotate around the rotating shaft 334. The rotating shaft 334 can be a snap-on rotating shaft 334, a hinged rotating shaft 334, or any other rotating shaft 334. The cover plate portion 333 is used to cover the harness groove 3311. When the harness 32 is assembled, the cover plate portion 333 can be opened through the rotating shaft 334. After the harness 32 is placed in the harness groove 3311, the cover plate portion 333 is covered on the harness groove 3311 through the rotating shaft 334. The setting of the rotating shaft 334 makes it easier to open and close the cover plate portion 333. After the harness 32 is assembled, the cover plate portion 333 is in a closed state, so that the electrolyte can be further prevented from being sprayed onto the harness 32.

[0086] See also Figure 3 and Figure 6 In some embodiments, the wiring harness plate assembly 30 also includes a baffle 34, which is installed on the supporting plate 31. The baffle 34 is provided with a plurality of snap-in structures 341, and the plurality of snap-in structures 341 respectively correspond to a plurality of wiring harnesses 32. One end of each wiring harness 32 close to the connecting plate 21 is snapped into the snap-in structure 341.

[0087] Specifically, the baffle 34 is mounted on the carrier plate 31, and a plurality of buckle structures 341 are provided on the baffle 34, and each buckle structure 341 corresponds to a group of wire harnesses 32. The buckle structure 341 is elastic, so that one end of each group of wire harnesses 32 close to the connecting piece 21 can be buckled to the buckle structure 341, that is, after one end of each group of wire harnesses 32 connected to the connecting piece 21 passes through the buckle structure 341, it is routed to the limiting hole 3312 and then accommodated in the wire harness groove 3311.

[0088] In the related art, when gluing or welding multiple groups of wire harnesses to multiple connecting pieces, it is necessary to manually hold a clamp one by one or manually hold one end of the wire harness to fix it so as to perform welding or gluing.

[0089] In the embodiment of the present application, a baffle 34 is provided on the carrier plate 31, and a plurality of elastic buckle structures 341 are provided on the baffle 34, and the wire harness 32 can be buckled in the buckle structures 341. In this way, the position of the wire harness 32 can be limited, and then when dispensing or welding, multiple wire harnesses 32 can be welded at one time without tools or holding the wire harness 32 by hand, which greatly improves the welding efficiency of the wire harness 32 and the connecting piece 21, and facilitates process production.

[0090] See also Figure 7The embodiment of the present application further provides an electric device 1000. The electric device 1000 includes a battery pack 100 of any of the above embodiments. The electric device 1000 may be an energy storage electric device, including but not limited to an industrial energy storage device or a household energy storage device.

[0091] In summary, in the battery pack 100, the battery module 200 and the electric device 1000 of the embodiment of the present application, the wiring harness plate assembly 30 is arranged on the battery module 10, and the wiring harness plate assembly 30 is connected to the connecting plate assembly 20, and is located on the side of the connecting plate assembly 20 away from the plurality of explosion-proof valves 12. In this way, when thermal runaway occurs, it is possible to prevent the electrolyte from directly splashing onto the wiring harness plate assembly 30, causing the wiring harness to melt, further aggravating the thermal runaway, and improving the safety and reliability of the battery module 200.

[0092] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0093] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0094] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0095] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific processes and examples of materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present application have been shown and described above, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack, It is characterized in that include: A battery module, wherein the battery module comprises a plurality of battery cells; A connecting piece assembly, the connecting piece assembly is used to connect the multiple battery cells, and the connecting piece assembly is arranged on the sides of the multiple explosion-proof valves of the multiple battery cells; A wiring harness plate assembly is disposed on the battery module, the wiring harness plate assembly is connected to the connecting plate assembly, and is located on a side of the connecting plate assembly away from the plurality of explosion-proof valves.

2. The battery pack according to claim 1, It is characterized in that The number of the connecting plate assemblies and the wiring harness plate assemblies are both two, the two connecting plate assemblies are respectively located on both sides of the multiple explosion-proof valves, and the two wiring harness plate assemblies are respectively located on the side of the corresponding two connecting plate assemblies away from the multiple explosion-proof valves.

3. The battery pack according to claim 1, It is characterized in that The multiple battery cells are arranged along the length direction of the battery module; The connecting piece assembly includes a plurality of connecting pieces, which are arranged at intervals along the length direction of the battery module and are used to connect the plurality of battery cells; The wiring harness board assembly includes a carrier plate and multiple groups of wiring harnesses. The carrier plate is arranged on a side of the battery module away from the battery pack bottom plate in the height direction. The multiple connecting plates are installed on the carrier plate, and the multiple groups of wiring harnesses are electrically connected to the multiple connecting plates respectively.

4. The battery pack according to claim 3, It is characterized in that The wiring harness plate assembly also includes a side plate, which is connected to the bearing plate and is located on the side of the battery module along the width direction. The side plate is used to fix the multiple groups of wiring harnesses.

5. The battery pack according to claim 4, It is characterized in that The side panel comprises: A fixing portion, the fixing portion is mounted on the carrying plate, the fixing portion is formed with a harness groove extending along the length direction of the battery module, and the harness groove is used to fix the multiple sets of harnesses; A supporting portion is connected to the fixing portion and extends from the fixing portion toward the battery pack bottom plate along a height direction of the battery module.

6. The battery pack according to claim 5, It is characterized in that The support portion is a whole support plate; or The support portion includes a plurality of sub-support plates arranged at intervals along the length direction of the battery module.

7. The battery pack according to claim 5, It is characterized in that The support portion is a hollow structure, and an air flow channel connected along the length direction of the battery pack is formed inside the support portion.

8. The battery pack according to claim 7, It is characterized in that The battery pack further comprises: An external shell, wherein the external shell is formed with a receiving space, the battery module is mounted in the receiving space, and the air flow channel is communicated with the receiving space, the external shell comprising a first panel and a second panel located on opposite sides of the battery module in a length direction; The airflow generating member is arranged on the first panel, and the second panel is provided with a through hole connecting the accommodating space with the outside of the external shell.

9. The battery pack according to claim 5, It is characterized in that The fixing portion is further provided with a plurality of limiting holes communicating with the wiring harness groove, the plurality of limiting holes respectively corresponding to the plurality of wiring harnesses, one end of each wiring harness is electrically connected to the connecting piece, and the other end passes through the limiting hole and is accommodated in the wiring harness groove; The plurality of limiting holes are used to respectively limit the movement of the plurality of wiring harnesses along the length direction of the battery module.

10. The battery pack according to claim 5, It is characterized in that The fixing portion is further provided with a plurality of limiters, which are distributed at intervals in the wiring harness groove, and are used to limit the movement of the plurality of wiring harness groups along the width direction of the battery module.

11. The battery pack according to claim 5, It is characterized in that The side plate also includes a cover portion, which is rotatably connected to the fixing portion via a rotating shaft. The extending direction of the rotating shaft is the same as the length direction of the battery module. The cover portion is used to cover the wiring harness slot.

12. The battery pack according to claim 3, It is characterized in that The wiring harness plate assembly also includes a baffle, which is installed on the supporting plate. A plurality of snap-in structures are provided on the baffle, and the plurality of snap-in structures correspond to the plurality of wiring harnesses respectively. One end of each wiring harness close to the connecting plate is snap-connected to the snap-in structure.

13. An electrical device, It is characterized in that A battery pack comprising any one of claims 1 to 12.

Images