Energy storage power supply
By using clamping and limiting components to directly integrate the battery cell assembly into the housing in the energy storage power supply, the problem of low assembly efficiency is solved, achieving efficient assembly and reducing material costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-04
- Publication Date
- 2026-04-07
AI Technical Summary
Energy storage power supplies have low assembly efficiency and involve many assembly steps.
The battery cell assembly is fixed inside the casing by using clamping and limiting components, eliminating the need for a battery pack casing. The direct integration of the battery cell assembly is achieved by using the cooperation of the limiting and clamping components, and a single clamping component is used to reduce material costs.
It improves the assembly efficiency of energy storage power supplies and reduces material costs.
Smart Images
Figure CN121812867A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of energy storage equipment technology, and more particularly to an energy storage power source. Background Technology
[0002] Energy storage power supplies include a casing and a battery pack. The battery pack includes multiple cell groups, and the cells in the cell groups are fixed together by limiting components. When assembling an energy storage power supply, the cell groups need to be fixed inside the battery pack casing to form a battery pack first by using limiting components, and then the battery pack is put into the casing. The assembly process is complicated and the assembly efficiency is low. Summary of the Invention
[0003] The purpose of this invention is to provide an energy storage power source to solve the problem of low assembly efficiency of energy storage power sources.
[0004] To achieve this objective, the present invention adopts the following technical solution: An energy storage power supply includes a housing, a limiting member, a first battery cell group, a second battery cell group, a holding member, and a limiting member. The housing includes a shell and a cover, which together form a receiving cavity. The limiting member is disposed within the receiving cavity and is divided into a first limiting member and a second limiting member, which are respectively disposed on both sides of the shell along a first direction. The first battery cell group and the second battery cell group are disposed within the receiving cavity and located between the first limiting member and the second limiting member. Both the first battery cell group and the second battery cell group include multiple battery cells arranged along a second direction, wherein the battery cells in the first battery cell group are first battery cells, and the battery cells in the second battery cell group are second battery cells. One end of the first battery cell is fixed by the first limiting member, and one end of the second battery cell is fixed by the second limiting member. The holding member presses the first battery cell group and the second battery cell group at both ends along the first direction, respectively. The first direction is perpendicular to the second direction and corresponds to the length direction of the battery cells.
[0005] In one embodiment, the limiting member has a plurality of limiting holes along the second direction, and the end of the battery cell away from the pressing member is inserted into each of the limiting holes in a corresponding manner.
[0006] In one embodiment, a support member is provided between the first limiting member and the second limiting member, and the end of the first battery cell away from the first limiting member and the end of the second battery cell away from the second limiting member are both disposed on the support member.
[0007] In one embodiment, the support member is provided with a plurality of support grooves, and the battery cell is embedded in the support grooves and supported by the groove walls.
[0008] In one embodiment, the support member is partially stamped from the housing.
[0009] In one embodiment, the limiting member is integrally formed into the housing.
[0010] In one embodiment, the holding member includes a pressing part and a stopping part. The pressing part presses against the peripheral surface of the battery cell, and the stopping part protrudes from the pressing part. The ends of the first battery cell and the second battery cell away from the limiting member abut against the stopping part along the first direction.
[0011] In one embodiment, the side of the pressing part facing the battery cell is provided with a plurality of pressing grooves arranged along the second direction, and the battery cell is embedded in the pressing groove and fits against the groove wall.
[0012] In one embodiment, the energy storage power supply further includes a busbar disposed at the end of the battery cell away from the holding member and connected to the positive and negative terminals of a plurality of adjacent battery cells, so that the plurality of battery cells are connected in series and / or in parallel.
[0013] In one embodiment, the housing is provided with a clearance groove at a position opposite to the second limiting member along the first direction.
[0014] In one embodiment, the cover has a shielding part corresponding to the position of the clearance groove to block the clearance groove.
[0015] In one embodiment, the battery cell includes a pressure relief valve, which is located at the end of the battery cell away from the pressure holding member, and a pressure relief hole is provided on the limiting member at the position opposite to the pressure relief valve.
[0016] In one embodiment, the pressure relief valve is provided at one end of the battery cell near the pressure holder, and a heat insulation sheet is provided between the first battery cell and the second battery cell.
[0017] In one embodiment, the holding member is provided with a first mounting groove, and the heat insulation sheet is inserted into the first mounting groove; and / or, the support member is provided with a second mounting groove, and the heat insulation sheet is inserted into the second mounting groove.
[0018] In one embodiment, the energy storage power supply further includes a circuit board substrate, on which an inverter module, a main control module and a BMS module are integrated. The circuit board substrate is disposed in the receiving cavity and spaced apart from the pressing member along the second direction. The circuit board substrate is perpendicular to a third direction, which is perpendicular to both the first direction and the second direction.
[0019] The beneficial effects of this invention are: The aforementioned energy storage power supply uses a combination of clamping and limiting components to fix the battery cells within the casing. The battery cells are directly integrated into the casing of the energy storage power supply, eliminating the need for a battery pack and improving assembly efficiency. Moreover, the first and second battery cells share a single clamping component, resulting in low material costs. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural schematic diagram of the energy storage power supply according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the energy storage power supply according to an embodiment of the present invention; Figure 3 This is a front view of an energy storage power source according to an embodiment of the present invention; Figure 4 yes Figure 3 A cross-sectional view along the AA direction; Figure 5 yes Figure 4 Enlarged view of point B in the middle; Figure 6 yes Figure 4 Enlarged view of point C in the middle; Figure 7 This is a structural schematic diagram of the holding member at one angle according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the pressing member from another angle according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the shell according to an embodiment of the present invention; Figure 10 yes Figure 9 Enlarged view of point D in the middle; Figure 11 This is a schematic diagram of the structure of a battery cell according to an embodiment of the present invention; Figure 12 This is a front view of the energy storage power source in another embodiment of the present invention; Figure 13 yes Figure 12 A sectional view along the EE direction in the middle; Figure 14 yes Figure 12 Enlarged view of point F in the middle; Figure 15 This is a schematic diagram of the structure of the pressure-holding member according to another embodiment of the present invention; Figure 16 This is a schematic diagram of the structure of the housing according to another embodiment of the present invention; Figure 17 This is a schematic diagram showing the connection between the battery pack and the busbar according to an embodiment of the present invention; Figure 18This is a schematic diagram showing the connection between the battery pack and the busbar according to another embodiment of the present invention.
[0021] In the picture: 1. Outer casing; 11. Housing; 111. Clearance groove; 12. Housing cover; 121. Shielding part; 2. Cell assembly; 2a. First cell assembly; 2b. Second cell assembly; 21. Cell; 21a. First cell; 21b. Second cell; 211. Cell housing; 212. Terminal post; 213. Pressure relief valve; 3. Circuit board substrate; 4. Electrical connector; 5. Limiting component; 5a. First limiting component; 5b. Second limiting component; 5 1. Baffle; 52. Limiting sleeve; 53. Top plate; 54. Limiting hole; 55. Limiting part; 56. Clearance hole; 57. Pressure relief hole; 6. Holding part; 61. Stop part; 62. Pressing part; 63. Pressing groove; 64. First mounting groove; 7. Supporting part; 71. Supporting part; 72. Mounting part; 73. Supporting groove; 74. Second mounting groove; 75. Clamping block; 8. Collecting part; 9. Busbar; 10. Heat insulation sheet. Detailed Implementation
[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0024] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the first feature can include direct contact between the second and first features, or contact between the second and first features through another feature between them. Furthermore, "above," "over," and "on top" of the first feature includes the second feature being directly above or diagonally above the first feature, or simply indicates that the second feature is at a higher horizontal level than the first feature. "Below," "below," and "under" the first feature includes the second feature being directly below or diagonally below the first feature, or simply indicates that the second feature is at a lower horizontal level than the first feature.
[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0026] like Figures 1-18 As shown, an embodiment of the present invention provides an energy storage power supply, including a housing 1, a battery cell assembly 2, a clamping member 6, and a limiting member 5. The housing 1 includes a shell 11 and a cover 12, which are connected by a method not limited to bolts or snap-fits and together form a receiving cavity. The limiting member 5 is disposed within the receiving cavity and is divided into a first limiting member 5a and a second limiting member 5b. The first limiting member 5a and the second limiting member 5b are respectively disposed on the housing 11 along a first direction (…). Figure 1 On both sides of the cavity (in the X direction), the battery cell group 2 is also disposed. The battery cell group 2 is divided into a first battery cell group 2a and a second battery cell group 2b arranged opposite each other along the first direction. The first battery cell group 2a and the second battery cell group 2b are both located between the first limiting member 5a and the second limiting member 5b. Each battery cell group 2 includes multiple battery cells 21 arranged along the second direction (Y direction in the figure). For easy distinction, the battery cells in the first battery cell group 2a are called the first battery cell 21a, and the battery cells in the second battery cell group 2b are called the second battery cell 21b. The far ends of the first battery cell 21 and the second battery cell 21b are respectively fixed by the first limiting member 5a and the second limiting member 5b. The two ends of the holding member 6 along the first direction are respectively pressed on the close ends of the first battery cell group 2a and the second battery cell group 2b to limit the first battery cell group 2a and the second battery cell group 2b. The first direction is perpendicular to the second direction and corresponds to the length direction of the battery cell 21, that is, the battery cell 21 extends along the first direction.
[0027] The aforementioned energy storage power supply uses a clamping member 6 and a limiting member 5 to fix the battery cell assembly 2 inside the outer casing 1. The battery cell assembly 2 is directly integrated into the outer casing 1 of the energy storage power supply, eliminating the need for a battery pack and improving assembly efficiency. Moreover, the two battery cell assemblies 2 share a single clamping member 6, resulting in low material costs.
[0028] In one embodiment, reference Figure 6 , Figure 9 and Figure 10As shown, the limiting member 5 has multiple limiting holes 54 along the second direction. The ends of each battery cell 21 in the battery cell assembly 2 that are away from the holding member 6 are correspondingly inserted into the limiting holes 54. Specifically, the limiting member 5 includes a baffle 51 and multiple limiting sleeves 52. The baffle 51 is vertically connected to the side of the housing 11 away from the cover 12, i.e., the baffle 51 is connected to the bottom wall of the housing 11. The multiple limiting sleeves 52 are arranged along the second direction on the side of the baffle 51 facing the holding member 6. The limiting holes 54 are correspondingly formed in the limiting sleeves 52 and extend through the limiting sleeves 52 along the first direction. The baffle 51 blocks the openings of the limiting holes 54 on the side away from the holding member 6 to axially limit the battery cells 21. More specifically, adjacent limiting sleeves 52 abut against each other to accommodate more battery cells 21 within the limited space of the receiving cavity.
[0029] The clamping member 6 can be fixed to the housing 11 by means of bolt connection or snap-fit, not limited to bolt connection. During the assembly of the energy storage power supply, multiple cells 21 in the cell group 2 are first fixed to the housing 11 by the clamping member 6 and the limiting member 5, and then the housing cover 12 is connected to the housing 11; or the clamping member 6 can be integrated into the housing cover 12, the limiting member 5 is used to initially limit the cell group 2, and then the housing cover 12 is connected to the housing 11. At the same time as the housing 11 and the housing cover 12 are connected, the clamping member 6 is pressed onto the cell 21, and the limiting member 5 is used to fix the cell group 2. In order to further reduce the assembly steps, the limiting member 5 is integrally formed into the housing 11 to further reduce the assembly steps.
[0030] For example, the clamping member 6 is provided with a first connecting hole, and the housing 11 is provided with a second connecting hole. The clamping member 6 is bolted to the housing 11 by fasteners passing through the first connecting hole and the second connecting hole.
[0031] When the battery cell assembly 2 is assembled into the housing 11, the battery cell 21 needs to be placed inside the housing 11 and coaxial with the limiting hole 54. Then, the battery cell 21 is moved along the direction of the limiting hole 54 to be inserted into the limiting hole 54, and then the holding member 6 is pressed onto the battery cell 21 of the two battery cell assemblies 2. Therefore, a gap is formed between the two battery cells 21 arranged opposite each other in the first direction in the two battery cell assemblies 2 (formed when the battery cell 21 is inserted into the limiting hole 54 in the first direction). Based on this, in order to fix the battery cell 21 along the first direction, the holding member 6 includes a pressing part 62 and a stop part 61. The pressing part 62 presses against the circumferential surface of the battery cell 21, and the stop part 61 protrudes from the pressing part 62. The two battery cells 21 of the two battery cell groups 2 are respectively located on opposite sides of the stop part 61 along the first direction. The end of the battery cell 21 away from the limiting member 5 abuts against the stop part 61 along the first direction, so as to cooperate with the limiting member 5 to fix the battery cell 21 along the first direction.
[0032] In order to increase the contact area between the holding member 6 and the battery cell 21, thereby improving the limiting ability of the holding member 6 to the battery cell 21, and also to further restrict the movement of the battery cell 21 along the second direction, the holding member 6 is provided with a plurality of pressing grooves 63 arranged along the second direction on the side facing the battery cell 21. The pressing grooves 63 are formed in the pressing part 62, and the battery cells 21 are embedded in the pressing grooves 63 one by one and fit against the groove wall of the pressing grooves 63.
[0033] In one embodiment, the battery cell 21 is a cylindrical battery cell, and in this case, the pressure groove 63 is set as an arc-shaped groove with the same radius as the battery cell 21. Of course, the battery cell 21 can also be a square battery cell, and correspondingly, the pressure groove 63 is set as a square groove.
[0034] It is understandable that after the battery cell 21 is inserted into the limiting hole 54, there is a gap between the end of the battery cell 21 inserted into the limiting hole 54 and the bottom wall of the housing 11. In order to support the end of the battery cell 21 away from the limiting member 5, a support member 7 is also provided on the housing 11. The support member 7 is provided on the housing 11 to support the end of the battery cell 21 away from the limiting member 5.
[0035] Specifically, to increase the contact area between the support member 7 and the battery cell 21, thereby further improving the support capacity for the battery cell 21, and also to further limit the battery cell 21 along the second direction, the support member 7 is provided with multiple support grooves 73. The battery cell 21 is embedded in the support grooves 73 and supported by the groove walls. It is understandable that the support grooves 73 also provide guidance for the battery cell 21 to be inserted into the limiting hole 54, reducing the difficulty of inserting the battery cell 21 into the limiting hole 54. Given that the battery cell 21 is a cylindrical battery cell, the support grooves 73 are also arc-shaped grooves.
[0036] In one embodiment, to reduce the processing cost of the housing 11 and thus the processing cost of the energy storage power supply, the support member 7 is formed by partial concave stamping of the housing 11. To improve the aesthetics of the housing 11, a label is affixed to the outer side of the housing 11 corresponding to the support member 7, and the label can indicate relevant information about the energy storage power supply.
[0037] Meanwhile, the support member 7 and the limiting member 5 are spaced apart. In order to further support the battery cell 21, a connecting rib is also provided between the support member 7 and the limiting member 5. The connecting rib extends along the first direction, with one end connected to the support member 7 and the other end connected to the limiting member 5.
[0038] To connect the individual cells 21 within the same cell group 2, the energy storage power supply also includes a busbar 9. The busbar 9 is located at the end of the cell 21 furthest from the holding member 6 and connects to the positive and negative terminals of multiple adjacent cells 21 within the same cell group 2, enabling series and / or parallel connection of multiple cells 21 within the cell group 2. The busbar 9 can be made of copper, aluminum, nickel, or an alloy material and can be electrically connected to the cell 21 through laser welding or compression. Specifically, the busbar 9 is located at the end of the cell 21 furthest from the holding member 6 to reduce the assembly difficulty between the busbar 9 and the cell 21.
[0039] refer to Figure 11 As shown, the battery cell 21 includes a battery cell housing 211 and a terminal post 212. One of the terminal post 212 and the battery cell housing 211 is used to transmit negative current, and the other of the terminal post 212 and the battery cell housing 211 is used to transmit positive current. The terminal post 212 is disposed on the side of the battery cell housing 211 near the limiting member 5. The baffle 51 of the limiting member 5 has a clearance hole 56 for the terminal post 212 to pass through. The busbar 9 is disposed on the side of the limiting member 5 away from the pressing member 6 and has multiple busbars.
[0040] In one embodiment, such as Figure 17 As shown, the two ends of the busbar 9 are respectively connected to the cell shell 211 and the terminal 212 of two adjacent cells 21 in the same cell group 2. That is, the cells 21 in the cell group 2 are connected in series through multiple busbars 9, thereby increasing the voltage of the cell group 2.
[0041] In another embodiment, such as Figure 18 As shown, the cells 21 in the same cell group 2 are connected in parallel in pairs through busbar 9 and then in series to achieve capacity expansion.
[0042] It is understandable that, since the cell casings 211 have the same polarity, the spacing between the two cells 21 arranged opposite each other in the first direction in the two sets of cell groups 2 can also prevent short circuits.
[0043] It should be noted that, given that the limiting member 5 is integrally formed into the housing 11, the distance between the limiting member 5 and the housing 11 along the first direction should not be too large, in order to improve the space utilization of the housing 1. On this basis, in order to reduce the installation difficulty of the busbar 9, a clearance groove 111 is provided on the housing 11 at the position corresponding to the limiting member 5. During assembly, the operator can pass through the clearance groove 111 from the outside of the housing 11 to assemble the busbar 9.
[0044] To ensure the relative sealing of the outer casing 1, a blocking part 121 is provided on the cover 12 at the position corresponding to the clearance groove 111, and the blocking part 121 blocks the clearance groove 111. Furthermore, in order to improve the connection stability between the blocking part 121 and the casing 11, the bottom wall of the blocking part 121 and the clearance groove 111 engage with each other.
[0045] In one embodiment, the two sets of battery cells 2 are connected to a busbar 9 (hereinafter referred to as the end busbar) disposed at the end of the battery cell sets 2 via an electrical connector 4, and the two sets of battery cells 2 are connected in series. (See reference) Figure 10 As shown, to reduce the difficulty of connecting the end busbar to the electrical connector 4, the limiting member 5 also includes a top plate 53. The top plate 53 is disposed on the side of the limiting sleeve 52 facing away from the bottom wall of the housing 11 and is connected to the baffle 51. The end of the top plate 53 is provided with a limiting part 55, which supports and limits the end busbar and / or the electrical connector 4, thereby reducing the possibility of deformation or displacement of the end busbar when the electrical connector 4 is connected to the end busbar. For example, the end busbar and the electrical connector 4 are bolted together.
[0046] refer to Figure 11 As shown, the battery cell 21 also includes a pressure relief valve 213, which releases the internal pressure of the battery cell 21 in a timely manner when thermal runaway or abnormal increase in internal pressure occurs, so as to prevent the battery cell 21 from exploding or burning violently.
[0047] In one embodiment, in order to reduce the impact of a failed battery cell 21 on another battery cell 21 that is opposite to it along the first direction, a pressure relief valve 213 is provided at the end of the battery cell 21 away from the pressure holding member 6, and a pressure relief hole 57 is provided on the baffle 51 corresponding to the position of the pressure relief valve 213.
[0048] In another embodiment, pressure relief valves 213 are provided at both ends of the battery cell 21 along the first direction. In this case, a heat insulation sheet 10 is provided between the first battery cell 21a and the second battery cell 21b arranged opposite to each other along the first direction, which can prevent the pressure relief valve 213 located at the end of a battery cell 21 near the pressure holding member 6 from affecting the normal use of the other battery cell 21.
[0049] Specifically, refer to Figure 14 and Figure 15 As shown, in order to limit the heat insulation sheet 10, the holding member 6 has a first mounting groove 64 on the side facing the battery cell 21, and the heat insulation sheet 10 is inserted into the first mounting groove 64. More specifically, the first mounting groove 64 is formed in the stop portion 61.
[0050] Alternatively, the support member 7 includes a support portion 71 and a mounting portion 72. A support groove 73 is formed on the support portion 71, and the mounting portion 72 is disposed on the support portion 71 and located between the first battery cell 21a and the second battery cell 21b. A second mounting groove 74 extending in a second direction is provided on the mounting portion 72, and the heat insulation sheet 10 is inserted into the second mounting groove 74.
[0051] Of course, the first mounting slot 64 and the second mounting slot 74 can also be set at the same time, and the heat insulation sheet 10 is inserted into the corresponding first mounting slot 64 and the second mounting slot 74.
[0052] Furthermore, to improve the stability of the heat insulation sheet 10 within the second mounting groove 74, a clamping block assembly is also provided within the second mounting groove 74. The clamping block assembly includes clamping blocks 75 disposed opposite to each other on two groove walls of the second mounting groove 74 along a first direction, with the heat insulation sheet 10 clamped between the two clamping blocks 75. Specifically, multiple sets of clamping block assemblies are spaced apart within the second mounting groove 74 along a second direction to further improve the stability of the heat insulation sheet 10 within the second mounting groove 74.
[0053] It is understandable that when the battery cell 21 is out of control, the pressure relief valve 213 located at the end of the battery cell 21 away from the pressure holding member 6 plays the main role of pressure relief because it is directly opposite the pressure relief hole 57.
[0054] In one embodiment, the energy storage power supply also includes a data acquisition unit 8 connected to the busbar 9. The data acquisition unit 8 is used to acquire the status information of each cell 21. The status information of the cell 21 may include information such as the voltage, current and temperature of each cell 21.
[0055] refer to Figure 2 As shown, in one embodiment, the energy storage power supply further includes a circuit board substrate 3. The circuit board substrate 3 integrates an inverter module, a main control module, and a BMS module. The circuit board substrate 3 is disposed in the receiving cavity and spaced apart from the pressure holder 6 along a second direction. The circuit board substrate 3 is perpendicular to a third direction (Z-direction in the figure), which is perpendicular to both the first and second directions. Based on this, electrical connectors 4 for connecting the two sets of battery cells 2 and electrical connectors 4 for connecting the circuit board substrate 3 are respectively connected to end busbars 9 located on opposite sides of the limiting member 5 along the second direction.
[0056] When assembling the above-mentioned energy storage power supply, the circuit board substrate 3 is first fixed to the housing 11 by means of bolt connection or snap-fit, not limited to bolt connection or snap-fit. At the same time, the battery cell 21 is placed in the housing 11 and pushed into the limiting hole 54 until it abuts against the baffle 51. If the holding member 6 and the housing cover 12 are set separately, the holding member 6 can be pressed on the battery cell 21 and fixedly connected to the housing 11. At the same time, the battery cell 21 and the circuit board substrate 3 are connected by the electrical connector 4, busbar 9, and acquisition member 8. Then the housing 11 is assembled on the housing cover 12 to complete the installation of the energy storage power supply. If the holding member 6 and the housing cover 12 are integrally formed, the two battery cell groups 2 and the circuit board substrate 3 can be connected by the electrical connector 4. Then the housing 11 is assembled on the housing cover 12. At the same time as the housing 11 is assembled on the housing cover 12, the holding member 6 is pressed on the battery cell group 2 to complete the installation of the energy storage power supply. The whole assembly process is simple and efficient.
[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. An energy storage power source, characterized in that, include: The outer casing includes a housing and a cover, the housing and the cover forming a receiving cavity; A limiting member is disposed within the receiving cavity. The limiting member is divided into a first limiting member and a second limiting member, which are respectively disposed on both sides of the housing along a first direction. The first battery cell group and the second battery cell group are disposed in the receiving cavity and located between the first limiting member and the second limiting member. The first battery cell group and the second battery cell group each include a plurality of battery cells arranged along the second direction. The battery cells in the first battery cell group are first battery cells, and the battery cells in the second battery cell group are second battery cells. The ends of the first battery cell and the second battery cell that are far apart from each other are fixed by the first limiting member and the second limiting member, respectively. A pressing member, wherein the two ends of the pressing member along the first direction are respectively pressed onto the first battery cell group and the second battery cell group; The first direction is perpendicular to the second direction, and the first direction corresponds to the length direction of the battery cell.
2. The energy storage power supply according to claim 1, characterized in that, The limiting member has multiple limiting holes along the second direction, and the end of the battery cell away from the holding member is inserted into each of the limiting holes in a corresponding manner.
3. The energy storage power supply according to claim 2, characterized in that, A support member is provided between the first limiting member and the second limiting member, and the end of the first battery cell away from the first limiting member and the end of the second battery cell away from the second limiting member are both provided on the support member.
4. The energy storage power supply according to claim 3, characterized in that, The support member is provided with multiple support slots, and the battery cell is embedded in the support slot and supported by the slot wall.
5. The energy storage power supply according to claim 3, characterized in that, The support member is partially stamped from the shell.
6. The energy storage power supply according to any one of claims 1-5, characterized in that, The limiting component is integrally formed into the housing.
7. The energy storage power supply according to claim 6, characterized in that, The holding member includes a pressing part and a stopping part. The pressing part presses against the peripheral surface of the battery cell, and the stopping part protrudes from the pressing part. One end of the battery cell away from the limiting member abuts against the stopping part along the first direction.
8. The energy storage power supply according to claim 7, characterized in that, The pressing part has a plurality of pressing grooves arranged along the second direction on the side facing the battery cell, and the battery cell is embedded in the pressing groove and fits against the groove wall.
9. The energy storage power supply according to claim 6, characterized in that, The energy storage power supply also includes a busbar, which is located at the end of the battery cell away from the holding member and connects to the positive and negative terminals of a plurality of adjacent battery cells, so that the plurality of battery cells are connected in series and / or in parallel.
10. The energy storage power supply according to claim 9, characterized in that, The housing has an clearance groove at a position opposite to the limiting member along the first direction.
11. The energy storage power supply according to claim 10, characterized in that, The cover has a shielding part at the position corresponding to the clearance groove to block the clearance groove.
12. The energy storage power supply according to claim 3, characterized in that, The battery cell includes a pressure relief valve, and the pressure relief valve is provided at the end of the battery cell away from the pressure holding member. The limiting member has a pressure relief hole at the position opposite to the pressure relief valve.
13. The energy storage power supply according to claim 12, characterized in that, The pressure relief valve is provided at one end of the battery cell near the pressure holding member, and a heat insulation sheet is provided between the first battery cell and the second battery cell.
14. The energy storage power supply according to claim 13, characterized in that, The pressing member is provided with a first mounting groove, and the heat insulation sheet is inserted into the first mounting groove; and / or, the support member is provided with a second mounting groove, and the heat insulation sheet is inserted into the second mounting groove.
15. The energy storage power source according to any one of claims 1-5, characterized in that, The energy storage power supply also includes a circuit board substrate, on which an inverter module, a main control module and a BMS module are integrated. The circuit board substrate is disposed in the receiving cavity and spaced apart from the pressing member along the second direction. The circuit board substrate is perpendicular to a third direction, which is perpendicular to both the first direction and the second direction.