Battery pack and energy storage system

Abstract

The utility model discloses a battery pack and an energy storage system. The battery pack comprises a shell, a battery pack and a battery pack, the frame is located in the shell and connected with the shell, the frame comprises a plurality of first plates and second plates, the first plates are spaced in the first direction, a containing cavity is defined between any two adjacent first plates, and the second plates connected with the first plates are arranged between any two adjacent first plates; the second plate divides the containing cavity into two sub-cavities in the second direction. A plurality of battery cells are arranged in each sub-cavity, the plurality of battery cells are sequentially stacked in the third direction, and the first direction, the third direction and the second direction are perpendicular to one another in pairs. According to the battery pack disclosed by the utility model, the plurality of battery cells in each sub-cavity are directly and sequentially stacked in the sub-cavity along the third direction to directly form the battery pack, so that the assembly procedures are reduced, the assembly is convenient, the production efficiency is effectively improved, and the cost is reduced.

Description

Technical Field

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

[0002] With the large-scale development of photovoltaic power generation systems and battery energy storage systems, household energy storage products have also become popular and applicable. Household energy storage systems mainly use solar energy to convert into electrical energy, and store the electrical energy in a battery pack. When electricity is needed, the battery pack provides electrical energy to the load. However, the assembly method of the battery pack of the existing energy storage system usually first assembles several battery cells according to standard sizes to form a battery module, and then installs and connects the battery module with the battery box to form a battery pack. The process is cumbersome, resulting in low overall work efficiency and high manufacturing costs. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack, which effectively improves production efficiency and reduces costs.

[0004] The utility model also provides an energy storage system, which includes the above-mentioned battery pack.

[0005] The battery pack according to the embodiment of the utility model includes: a shell; a frame, wherein the frame is located inside the shell and connected to the shell, the frame includes a first plate and a second plate, the first plates are a plurality of plates spaced apart along a first direction, a accommodating cavity is defined between any two adjacent first plates, a second plate connected to the first plates is provided between any two adjacent first plates, and the second plate divides the accommodating cavity into two sub-cavities along a second direction; battery cells, each of the sub-cavities has a plurality of the battery cells, the plurality of the battery cells are stacked in sequence along a third direction, and the first direction, the third direction and the second direction are perpendicular to each other.

[0006] According to the battery pack of the embodiment of the utility model, the frame is located in the shell and connected to the shell, the frame includes a first plate and a second plate, the first plates are multiple and spaced apart along the first direction, a accommodating cavity is defined between any two adjacent first plates, a second plate connected to the first plate is provided between any two adjacent first plates, the second plate divides the accommodating cavity into two sub-cavities along the second direction, each sub-cavity has a plurality of battery cells, and the plurality of battery cells are stacked in sequence along a third direction, so that the plurality of battery cells located in each sub-cavity are directly stacked in sequence along the third direction in the sub-cavity to directly form a battery pack, thereby reducing the assembly process and facilitating assembly, thereby effectively improving production efficiency and reducing costs.

[0007] In some embodiments of the present invention, the second plate has first matching parts at both ends along the first direction, the first plate has second matching parts matching with the first matching parts, and the first matching parts and the second matching parts are connected by snapping.

[0008] In some embodiments of the present invention, the first plate has a plurality of cavities, the plurality of cavities extend along the third direction, and the plurality of cavities are spaced apart along the second direction; and / or the second plate has a plurality of cavities, the plurality of cavities extend along the third direction, and the plurality of cavities are spaced apart along the first direction.

[0009] In some embodiments of the present utility model, the shell includes: a base, wherein the first plate located at one end of the first direction among the plurality of first plates is connected to the base; a top plate, wherein the base and the top plate are spaced apart along the first direction, and the first plates located at both ends of the first direction and away from the base among the plurality of first plates are spaced apart from the top plate; two end plates, wherein the two end plates are spaced apart along the third direction, and each of the end plates is respectively connected to the top plate and the base at both ends along the first direction, the first plate is respectively connected to the two end plates at both ends along the third direction, and the second plate is respectively connected to the two end plates at both ends along the third direction; two panels, wherein the two end plates are spaced apart along the second direction, and the two panels are respectively connected to the two end plates at both ends along the third direction, and the two panels are respectively connected to the top plate and the base at both ends along the first direction, and the first plate is respectively connected to the two panels at both ends along the second direction.

[0010] In some embodiments of the present invention, there is foam between the base and the first plate close to the base; and / or, there is foam between the top plate and the first plate close to the top plate; and / or, there is foam between any two adjacent battery cells; and / or, there is foam between the battery cells at both ends along the third direction of the multiple battery cells stacked along the third direction and the end plates respectively.

[0011] In some embodiments of the utility model, the pole of the battery cell is arranged on the side of the battery cell along the second direction away from the second plate, and the battery pack also includes two bus assemblies connected to the pole, the two bus assemblies are spaced apart along the second direction and arranged one by one corresponding to the battery cells on both sides of the second plate, and the two bus assemblies are located on the side of the battery cells in the two sub-cavities away from each other.

[0012] In some embodiments of the present invention, the busbar assembly includes: a busbar bracket, two of the busbar brackets are respectively connected to the two panels of the battery pack, the first plate and the second plate; and a busbar body, the busbar body is located on the busbar bracket and connected to the poles of the plurality of battery cells.

[0013] In some embodiments of the present invention, the two panels have reinforcing ribs on one side facing the busbar bracket, and the two busbar brackets have matching grooves that match the reinforcing ribs.

[0014] In some embodiments of the utility model, it also includes: a sampling line, wherein there are two sampling lines, each of the bus brackets has a wire groove for the sampling line to pass through, and the two sampling lines pass through two bus brackets respectively; an electric control system, wherein the electric control system is located on a side of the first board at one end of the plurality of first boards along the first direction away from the other first boards, and the output ends of the two sampling lines are connected to the electric control system.

[0015] The energy storage system according to the embodiment of the utility model includes: the above-mentioned battery pack, the battery pack also includes an electric control system; an inverter system, the inverter system is located outside the battery pack, and the inverter system is connected to the electric control system.

[0016] According to the energy storage system of the embodiment of the utility model, a battery pack is provided, and a frame is located in an outer shell and connected to the outer shell, and the frame includes a first plate and a second plate, wherein the first plates are a plurality of plates spaced apart along a first direction, and a receiving cavity is defined between any two adjacent first plates, and a second plate connected to the first plate is provided between any two adjacent first plates, and the second plate divides the receiving cavity into two sub-cavities along the second direction, and each sub-cavity has a plurality of battery cells, and the plurality of battery cells are stacked in sequence along a third direction, so that the plurality of battery cells located in each sub-cavity are directly stacked in sequence along the third direction in the sub-cavity to directly form a battery pack, thereby reducing the assembly process and facilitating assembly, thereby effectively improving the production efficiency of the electronic control system and reducing costs.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural diagram of an energy storage system according to the utility model;

[0020] Figure 2is an exploded view of a battery pack according to the utility model;

[0021] Figure 3 It is a structural diagram of the frame and base of the battery pack according to the utility model;

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 It is a partial structural diagram of a battery pack according to the utility model, wherein a base, a frame, a battery cell and foam are shown;

[0024] Figure 6 It is a partial structural diagram of a battery pack according to the utility model, wherein a base, a frame, a battery cell, foam and an end plate are shown;

[0025] Figure 7 It is a partial structural diagram of a battery pack according to the utility model, wherein a base, a frame, a battery cell, foam, an end plate, a bus assembly, a sampling line and an electronic control system are shown;

[0026] Figure 8 It is a partial exploded view of the battery pack according to the utility model.

[0027] Reference numerals:

[0028] 1000. Energy storage system;

[0029] 100. Battery pack;

[0030] 1. Shell; 11. Base; 12. Top plate; 13. End plate; 14. Panel; 141. Reinforcement ribs;

[0031] 2. frame; 21. first plate; 211. accommodating cavity; 2111. sub-cavity; 212. cavity; 213. second matching portion; 22. second plate; 221. first matching portion;

[0032] 3. Battery cell; 31. Electrode;

[0033] 4. Foam;

[0034] 5. Busbar assembly; 51. Busbar body; 511. Busbar subassembly; 512. Total positive and total negative busbars; 52. Busbar bracket; 521. Matching groove;

[0035] 6. Sampling line;

[0036] 7. Electronic control system;

[0037] 200. Inverter system. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 utility model 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] A battery pack 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0042] like Figure 2 , Figure 3 , Figure 5 and Figure 8 As shown, the battery pack 100 according to the embodiment of the utility model includes a shell 1, a frame 2 and a battery cell 3. Among them, the frame 2 is located in the shell 1 and connected to the shell 1, and the frame 2 includes a first plate 21 and a second plate 22. The first plates 21 are multiple and spaced apart along the first direction. A receiving cavity 211 is defined between any two adjacent first plates 21. A second plate 22 connected to the first plate 21 is provided between any two adjacent first plates 21. The second plate 22 divides the receiving cavity 211 into two sub-cavities 2111 along the second direction. Each sub-cavity 2111 has multiple battery cells 3. The multiple battery cells 3 are stacked in sequence along the third direction, and the first direction, the third direction and the second direction are perpendicular to each other.

[0043] It is understandable that the plurality of first plates 21 and the second plates 22 are located in the housing 1 and connected to the housing 1, so that a receiving cavity 211 is defined between any two adjacent first plates 21 along the first direction, and the second plate 22 divides the receiving cavity 211 into two sub-cavities 2111 along the second direction, and the plurality of battery cells 3 located in each sub-cavity 2111 are stacked in sequence in the sub-cavity 2111 along the third direction to directly form a battery pack 100. Compared with the prior art, the battery pack 100 of the utility model reduces the process of re-boxing the battery module after the plurality of battery cells 3 form the battery module, thereby reducing the assembly process and facilitating assembly, thereby effectively improving production efficiency and reducing costs.

[0044] At the same time, by providing multiple first plates 21, a receiving cavity 211 is defined between any two adjacent first plates 21, so that the battery pack 100 of the utility model can stack multiple layers of battery cells 3 along the first direction according to the needs of users, meeting different user needs, and the first plate 21 and the second plate 22 are common, further reducing costs. In addition, the receiving cavity 211 is divided into two sub-cavities 2111 along the second direction by the second plate 22, so as to reasonably utilize the receiving cavity 211 defined between any two adjacent first plates 21, thereby improving space utilization.

[0045] According to the battery pack 100 of the embodiment of the utility model, the frame 2 is located in the outer shell 1 and is connected to the outer shell 1, and the frame 2 includes a first plate 21 and a second plate 22, the first plates 21 are multiple and spaced apart along the first direction, and a accommodating cavity 211 is defined between any two adjacent first plates 21, and a second plate 22 connected to the first plate 21 is provided between any two adjacent first plates 21, and the second plate 22 divides the accommodating cavity 211 into two sub-cavities 2111 along the second direction, and each sub-cavity 2111 has a plurality of battery cells 3, and the plurality of battery cells 3 are stacked in sequence along the third direction, so that the plurality of battery cells 3 located in each sub-cavity 2111 are directly stacked in sequence along the third direction in the sub-cavity 2111 to directly form the battery pack 100, thereby reducing the assembly process and facilitating assembly, thereby effectively improving production efficiency and reducing costs.

[0046] In some embodiments of the present invention, Figure 3 and Figure 4As shown, the second plate 22 has first matching parts 221 at both ends along the first direction, and the first plate 21 has second matching parts 213 matching with the first matching parts 221, and the first matching parts 221 and the second matching parts 213 are connected by snapping. Thus, the second plate 22 located between any two adjacent first plates 21 is connected to the first plate 21 by snapping the first matching parts 221 and the second matching parts 213, so that the second plate 22 divides the accommodating cavity 211 into two sub-cavities 2111 along the second direction. At the same time, the first matching parts 221 and the second matching parts 213 are connected by snapping, which facilitates the assembly of the first plate 21 and the second plate 22, thereby improving the assembly efficiency.

[0047] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the first plate 21 has a plurality of cavities 212, each of which extends along the third direction and is spaced apart along the second direction. Thus, the heat dissipation effect of the first plate 21 is improved by the arrangement of the plurality of cavities 212, thereby improving the reliability of the battery pack 100.

[0048] In some embodiments of the present invention, the second plate 22 has a plurality of cavities 212, each of which extends along the third direction and is spaced apart along the first direction. Thus, the heat dissipation effect of the second plate 22 is improved by providing the plurality of cavities 212, thereby improving the reliability of the battery pack 100.

[0049] In some embodiments of the present invention, Figure 2 and Figure 5-Figure 8 As shown, the housing 1 includes a base 11, a top plate 12, two end plates 13 and two panels 14. Among them, the first plate 21 located at one end of the first direction among the plurality of first plates 21 is connected to the base 11, the base 11 and the top plate 12 are spaced apart along the first direction, the first plates 21 located at both ends of the first direction away from the base 11 among the plurality of first plates 21 are spaced apart from the top plate 12, the two end plates 13 are spaced apart along the third direction, the two ends of each end plate 13 along the first direction are respectively connected to the top plate 12 and the base 11, the two ends of the first plate 21 along the third direction are respectively connected to the two end plates 13, the two ends of the second plate 22 along the third direction are respectively connected to the two end plates 13, the two end plates 13 are spaced apart along the second direction, the two ends of the two panels 14 along the third direction are respectively connected to the two end plates 13, the two ends of the two panels 14 along the first direction are respectively connected to the top plate 12 and the base 11, and the two ends of the first plate 21 along the second direction are respectively connected to the two panels 14.

[0050] It can be understood that the base 11, the top plate 12, the two end plates 13 and the two panels 14 form a storage space, the frame 2 and the battery cell 3 are located in the storage space, and the first plate 21 is connected to the base 11, the two ends of the first plate 21 along the third direction are respectively connected to the two end plates 13, the two ends of the second plate 22 along the third direction are respectively connected to the two end plates 13, and the two ends of the first plate 21 along the second direction are respectively connected to the two panels 14, thereby ensuring the connection strength between the frame 2 and the shell 1, thereby improving the overall reliability of the battery pack 100. At the same time, compared with the prior art, which also needs to fix the battery cell 3 by steel belts or brackets, the battery pack 100 of the utility model only needs the frame 2 and the shell 1 to fix the battery cell 3, further reducing costs and improving assembly efficiency.

[0051] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, there is foam 4 between the base 11 and the first plate 21 close to the base 11. Therefore, the foam 4 has low hardness and high resilience properties, which can buffer the expansion stress of the battery cell 3 during the charging and discharging process of the battery cell 3. At the same time, when the battery cell 3 has thermal runaway, the heat insulation effect of the foam 4 can suppress heat diffusion, delay the occurrence of accidents, and improve the reliability of the battery pack 100.

[0052] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, there is foam 4 between the top plate 12 and the first plate 21 close to the top plate 12. Therefore, the foam 4 has low hardness and high resilience properties, which can buffer the expansion stress of the battery cell 3 during the charging and discharging process of the battery cell 3. At the same time, when the battery cell 3 has thermal runaway, the heat insulation effect of the foam 4 can suppress heat diffusion, delay the occurrence of accidents, and improve the reliability of the battery pack 100.

[0053] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, there is foam 4 between any two adjacent battery cells 3. Therefore, the foam 4 has low hardness and high resilience properties, which can buffer the expansion stress of the battery cell 3 during the charging and discharging process of the battery cell 3. At the same time, when the battery cell 3 has thermal runaway, the heat insulation effect of the foam 4 can inhibit heat diffusion, delay the occurrence of accidents, and improve the reliability of the battery pack 100.

[0054] In some embodiments of the present invention, Figure 5 and Figure 6As shown, the battery cells 3 at both ends of the plurality of battery cells 3 stacked along the third direction are provided with foam 4 between the end plates 13. Thus, the foam 4 has low hardness and high resilience properties, which can buffer the expansion stress of the battery cell 3 during the charge and discharge process of the battery cell 3. At the same time, when the battery cell 3 has thermal runaway, the thermal insulation effect of the foam 4 can suppress heat diffusion, delay the occurrence of accidents, and improve the reliability of the battery pack 100.

[0055] In some embodiments of the present invention, Figure 5-Figure 7 As shown, the pole 31 of the battery cell 3 is arranged on the side of the battery cell 3 away from the second plate 22 along the second direction. The battery pack 100 also includes two bus assemblies 5 connected to the pole 31. The two bus assemblies 5 are spaced apart along the second direction and arranged one by one with the battery cells 3 on both sides of the second plate 22. The two bus assemblies 5 are located on the side of the battery cells 3 facing away from each other in the two sub-cavities 2111.

[0056] It can be understood that the accommodating cavity 211 is divided into two sub-cavities 2111 along the second direction by the second plate 22, the pole 31 of the battery cell 3 is arranged on the side of the battery cell 3 away from the second plate 22 along the second direction, and the two busbar assemblies 5 are located on the side of the battery cells 3 in the two sub-cavities 2111 away from each other, so that the poles 31 of the battery cells 3 located in the two sub-cavities 2111 are respectively connected to the two busbar assemblies 5 from the side away from each other, thereby reasonably utilizing the accommodating cavity 211 defined between any two adjacent first plates 21, and improving space utilization. At the same time, the poles 31 of multiple battery cells 3 in the sub-cavities 2111 are respectively converged together by the two busbar assemblies 5 to form an equipotential, thereby realizing the series and parallel connection of the battery pack 100.

[0057] In some embodiments of the present invention, Figure 7 As shown, the busbar assembly 5 includes a busbar bracket 52 and a busbar body 51. The two busbar brackets 52 are respectively connected to the two panels 14, the first plate 21 and the second plate 22 of the battery pack 100, and the busbar body 51 is located on the busbar bracket 52 and connected to the poles 31 of the multiple battery cells 3. Thus, the two busbar brackets 52 are respectively connected to the two panels 14, the first plate 21 and the second plate 22 of the battery pack 100 to respectively realize the fixation of the two busbar brackets 52, thereby realizing the fixation of the busbar body 51 located on the busbar bracket 52, and improving the understanding reliability of the busbar body 51 and the poles 31 of the multiple battery cells 3.

[0058] Furthermore, the busbar body 51 includes a busbar sub-component 511 and a total positive and total negative busbar 512, the busbar sub-component 511 is connected to the poles 31 of multiple battery cells 3 by laser welding, and the busbar sub-component 511 and the total positive and total negative busbar 512 are connected by laser welding.

[0059] In some embodiments of the present invention, Figure 8 As shown, the two panels 14 have reinforcing ribs 141 on one side facing the busbar bracket 52, and the two busbar brackets 52 have matching grooves 521 that match the reinforcing ribs 141. Thus, the structural strength of the two panels 14 is strengthened by the provision of the reinforcing ribs 141, thereby improving the overall structural strength of the housing 1. At the same time, the connection strength between the two busbar brackets 52 and the two panels 14 is further improved by the cooperation of the reinforcing ribs 141 and the matching grooves 521, thereby improving the overall structural strength of the battery pack 100.

[0060] In some embodiments of the present invention, Figure 2 , Figure 7 and Figure 8 As shown, the battery pack 100 further includes a sampling line 6 and an electric control system 7. There are two sampling lines 6, each bus bracket 52 has a wire slot for the sampling line 6 to pass through, and the two sampling lines 6 pass through two bus brackets 52 respectively. The electric control system 7 is located on a side of a first board 21 at one end of the plurality of first boards 21 along the first direction away from the other first boards 21, and the output ends of the two sampling lines 6 are connected to the electric control system 7.

[0061] It can be understood that the nickel sheet of the sampling line 6 is fixed on the bus body 51 to realize the collection of data of multiple battery cells 3, and the output ends of the two sampling lines 6 are connected to the electronic control system 7, so that the data of multiple battery cells 3 are output to the electronic control system 7 through the two sampling lines 6. At the same time, each bus bracket 52 has a wire groove for the sampling line 6 to pass through, which ensures that the sampling line 6 is fixed in the battery pack 100 and improves the overall reliability. Optionally, the nickel sheet of the sampling line 6 is connected to the bus body 51 by laser welding.

[0062] Further, the housing 1 includes a base 11, a top plate 12, two end plates 13 and two panels 14. Among them, the first plate 21 located at one end of the first direction among the plurality of first plates 21 is connected to the base 11, the base 11 and the top plate 12 are spaced apart along the first direction, the first plates 21 located at both ends of the first direction and away from the base 11 among the plurality of first plates 21 are spaced apart from the top plate 12, the two end plates 13 are spaced apart along the third direction, each end plate 13 is connected to the top plate 12 and the base 11 at both ends along the first direction, the two end plates 13 are spaced apart along the second direction, the two panels 14 are connected to the two end plates 13 at both ends along the third direction, and the two panels 14 are connected to the top plate 12 and the base 11 at both ends along the first direction. Thus, a storage space for placing the electric control system 7 is formed by the first plates 21 located at both ends of the first direction and away from the base 11 among the plurality of first plates 21 being spaced apart from the top plate 12.

[0063] Reference below Figure 2-Figure 8The assembly process of the battery pack 100 of a specific embodiment of the present utility model is described in detail. It can be understood that the following description is only an exemplary illustration and cannot be understood as a limitation to the utility model.

[0064] The battery pack 100 includes a housing 1, a frame 2, a battery cell 3, a busbar assembly 5, a sampling line 6, and an electronic control system 7. The frame 2 is located in the housing 1 and connected to the housing 1. The frame 2 includes a first plate 21 and a second plate 22. The first plates 21 are multiple and spaced apart along a first direction. An accommodating cavity 211 is defined between any two adjacent first plates 21. A second plate 22 connected to the first plate 21 is provided between any two adjacent first plates 21. The second plate 22 divides the accommodating cavity 211 into two sub-cavities 2111 along a second direction. Each sub-cavity 2111 has multiple battery cells 3. The multiple battery cells 3 are stacked in sequence along a third direction. The first direction, the third direction, and the second direction are perpendicular to each other.

[0065] The housing 1 includes a base 11, a top plate 12, two end plates 13 and two panels 14. Among them, the first plate 21 located at one end in the first direction among the plurality of first plates 21 is connected to the base 11, the base 11 and the top plate 12 are spaced apart along the first direction, the first plates 21 located at both ends of the first direction and away from the base 11 among the plurality of first plates 21 are spaced apart from the top plate 12, the two end plates 13 are spaced apart along the third direction, the two ends of each end plate 13 along the first direction are respectively connected to the top plate 12 and the base 11, the two ends of the first plate 21 along the third direction are respectively connected to the two end plates 13, the two ends of the second plate 22 along the third direction are respectively connected to the two end plates 13, the two end plates 13 are spaced apart along the second direction, the two ends of the two panels 14 along the third direction are respectively connected to the two end plates 13, the two ends of the two panels 14 along the first direction are respectively connected to the top plate 12 and the base 11, and the two ends of the first plate 21 along the second direction are respectively connected to the two panels 14.

[0066] The busbar assembly 5 includes a busbar bracket 52 and a busbar body 51. The two busbar brackets 52 are respectively connected to the two panels 14, the first plate 21 and the second plate 22 of the battery pack 100, and the busbar body 51 is located on the busbar bracket 52 and connected to the poles 31 of the multiple battery cells 3. There are two sampling lines 6, each busbar bracket 52 has a wire groove for the sampling line 6 to pass through, and the two sampling lines 6 pass through the two busbar brackets 52 respectively. The electric control system 7 is located on the side of the first plate 21 at one end of the multiple first plates 21 along the first direction away from the other first plates 21, and the output ends of the two sampling lines 6 are connected to the electric control system 7.

[0067] Specifically, firstly, the first first plate 21 is bolted to the base 11, the first second plate 22 is bolted to the second first plate 21, and then the second first plate 21 is bolted to the first second plate 22, so that the first second plate 22 divides the accommodating cavity 211 formed by the two first plates 21 into two sub-cavities 2111 along the second direction, and the multiple battery cells 3 in each sub-cavity 2111 are stacked in sequence along the third direction, so as to achieve the stacking of the first layer of battery cells 3. Then, one of the end plates 13 is bolted to the base 11, the two first plates 21, and the second plate 22, respectively, and then the other end plate 13 is bolted to the base 11, the two first plates 21, and the second plate 22 after applying pressure toward the battery cells 3 along the second direction. Then, the two busbar brackets 52 are bolted to the first plate 21 and the second plate 22 respectively, and the busbar body 51 is bolted to the busbar bracket 52, so that the busbar body 51 is welded to the poles 31 of the multiple battery cells 3, and then the two sampling lines 6 are passed through the two busbar brackets 52 and welded to the multiple battery cells 3, and then the electric control system 7 is located above the second first plate 21, and the output ends of the two sampling lines 6 are connected to the electric control system 7. Then, the two panels 14 of the battery are bolted to the two end plates 13, the bottom plate and the busbar brackets 52 close to each other, and finally the top plate 12 is bolted to the end plate 13 and the panel 14 respectively, so as to realize the assembly of the battery pack 100.

[0068] It should be noted that the battery pack 100 of the present invention can stack multiple layers of battery cells 3 along the first direction as required, for example, Figure 6 As shown, the battery pack 100 includes three first plates 21 and two first plates 21 spaced apart along the first direction. Specifically, the first first plate 21 is first bolted to the base 11, the first second plate 22 is bolted to the second first plate 21, and then the second first plate 21 is bolted to the first second plate 22, so that the first second plate 22 divides the accommodating cavity 211 formed by the two first plates 21 into two sub-cavities 2111 along the second direction, and the multiple battery cells 3 in each sub-cavity 2111 are stacked in sequence along the third direction, thereby realizing the stacking of the first layer of battery cells 3. The second second plate 22 is then bolted to the second first plate 21 in a direction away from the first first plate 21, and the third first plate 21 is connected to the second second plate 22, so that the second second plate 22 divides the accommodating cavity 211 formed by the two first plates 21 into two sub-cavities 2111 along the second direction, and the multiple battery cells 3 in each sub-cavity 2111 are stacked in sequence along the third direction, thereby realizing the stacking of the second layer of battery cells 3.

[0069] Furthermore, there is foam 4 between any two adjacent battery cells 3, and there is foam 4 between the battery cells 3 at both ends of the plurality of battery cells 3 stacked along the third direction and the end plates 13. Thus, when another end plate 13 applies pressure toward the battery cell 3 along the second direction, the tolerance is absorbed by the foam 4, thereby improving the overall reliability.

[0070] The energy storage system 1000 according to an embodiment of the present invention is described below.

[0071] According to the energy storage system 1000 of the embodiment of the present utility model, Figure 1-Figure 8 As shown, the energy storage system 1000 includes a battery pack 100 and an inverter system 200 . The battery pack 100 also includes an electronic control system 7 . The inverter system 200 is located outside the battery pack 100 , and the inverter system 200 is connected to the electronic control system 7 .

[0072] It is understandable that the battery pack 100 is used for electricity storage in the energy storage system 1000. Specifically, when the energy storage system 1000 is used for photovoltaic charging, the photovoltaic DC power enters from the electronic control system 7 and flows to the inverter system 200, and returns to the electronic control system 7 after being transformed and ballasted by the inverter system 200, and is charged by the electronic control system 7 after judgment. When the energy storage system 1000 is used for city power charging, the grid AC power enters from the electronic control system 7 and flows to the inverter system 200, and returns to the electronic control system 7 after the inverter system 200 inverts the AC power into DC power, and is charged by the electronic control system 7 after judgment. When the energy storage system 1000 is load-discharging, the DC power of the battery system flows to the inverter system 200 after judgment by the electronic control system 7, and the DC power is inverted into AC power by the inverter system 200, and the current returns to the electronic control system 7, and the load output current is provided by the electronic control system 7.

[0073] According to the energy storage system 1000 of the embodiment of the utility model, a battery pack 100 is provided, and a frame 2 is located in the outer shell 1 and connected to the outer shell 1, and the frame 2 includes a first plate 21 and a second plate 22, the first plates 21 are multiple and spaced apart along a first direction, and a accommodating cavity 211 is defined between any two adjacent first plates 21, and a second plate 22 connected to the first plate 21 is provided between any two adjacent first plates 21, and the second plate 22 divides the accommodating cavity 211 into two sub-cavities 2111 along the second direction, and each sub-cavity 2111 has a plurality of battery cells 3, and the plurality of battery cells 3 are stacked in sequence along a third direction, so that the plurality of battery cells 3 located in each sub-cavity 2111 are directly stacked in sequence along the third direction in the sub-cavity 2111 to directly form the battery pack 100, thereby reducing the assembly process and facilitating assembly, thereby effectively improving the production efficiency of the electric control system 7 and reducing the cost.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described, 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 invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: shell; a frame, the frame being located in the shell and connected to the shell, the frame comprising a first plate and a second plate, the first plates being a plurality of plates spaced apart along a first direction, a receiving cavity being defined between any two adjacent first plates, a second plate connected to the first plates being provided between any two adjacent first plates, the second plate dividing the receiving cavity into two sub-cavities along a second direction; The battery cells are each provided with a plurality of the battery cells, and the plurality of the battery cells are stacked in sequence along a third direction, and the first direction, the third direction and the second direction are perpendicular to each other.

2. The battery pack according to claim 1, characterized in that: The second plate has first matching parts at both ends along the first direction, the first plate has second matching parts matching with the first matching parts, and the first matching parts and the second matching parts are connected by snapping.

3. The battery pack according to claim 1, characterized in that: The first plate has a plurality of cavities, each of the plurality of cavities extends along the third direction, and the plurality of cavities are spaced apart along the second direction; And / or, the second plate has a plurality of cavities, the plurality of cavities extend along the third direction, and the plurality of cavities are spaced apart along the first direction.

4. The battery pack according to claim 1, characterized in that: The housing comprises: A base, wherein the first plate located at one end of the first direction among the plurality of first plates is connected to the base; A top plate, the base and the top plate are spaced apart along the first direction, and the first plates located at both ends of the first direction and away from the base among the plurality of first plates are spaced apart from the top plate; Two end plates, the two end plates are spaced apart along the third direction, two ends of each end plate along the first direction are respectively connected to the top plate and the base, two ends of the first plate along the third direction are respectively connected to the two end plates, and two ends of the second plate along the third direction are respectively connected to the two end plates; Two panels, the two end plates are spaced apart along the second direction, the two ends of the two panels along the third direction are respectively connected to the two end plates, the two ends of the two panels along the first direction are respectively connected to the top plate and the base, and the two ends of the first plate along the second direction are respectively connected to the two panels.

5. The battery pack according to claim 4, characterized in that: There is foam between the base and the first plate close to the base; And / or, there is foam between the top plate and the first plate close to the top plate; And / or, there is foam between any two adjacent battery cells; And / or, foam is provided between the battery cells at both ends along the third direction of the plurality of battery cells stacked along the third direction and the end plates respectively.

6. The battery pack according to claim 1, characterized in that: The pole of the battery cell is arranged on the side of the battery cell away from the second plate along the second direction. The battery pack also includes two bus assemblies connected to the pole. The two bus assemblies are spaced apart along the second direction and arranged one by one corresponding to the battery cells on both sides of the second plate. The two bus assemblies are located on the side of the battery cells in the two sub-cavities away from each other.

7. The battery pack according to claim 6, characterized in that: The busbar assembly comprises: A busbar bracket, wherein two of the busbar brackets are respectively connected to two panels of the battery pack, the first plate, and the second plate; A busbar body is located on the busbar support and connected to the poles of the plurality of battery cells.

8. The battery pack according to claim 7, characterized in that: The two panels have reinforcing ribs on one side facing the busbar bracket, and the two busbar brackets have matching grooves matching with the reinforcing ribs.

9. The battery pack according to claim 7, characterized in that: Also includes: Sampling lines, there are two sampling lines, each of the busbar brackets has a wire slot for the sampling line to pass through, and the two sampling lines pass through two busbar brackets respectively; An electric control system is located at a side of the first board at one end of the plurality of first boards along the first direction away from the other first boards, and output ends of the two sampling lines are both connected to the electric control system.

10. An energy storage system, characterized in that: include: The battery pack according to any one of claims 1 to 9, further comprising an electronic control system; An inverter system, wherein the inverter system is located outside the battery pack and is connected to the electronic control system.

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