Energy storage power supply

Abstract

The invention belongs to the technical field of energy storage equipment, and discloses an energy storage power supply which comprises a shell, a battery module and a limiting piece, a containing cavity is formed in the shell, the limiting piece is fixedly arranged in the containing cavity, limiting hole sets are formed in the two opposite sides of the limiting piece in the first direction, and each limiting hole set comprises a plurality of limiting holes distributed in the second direction; the battery modules are arranged in the containing cavity and are divided into a first battery module and a second battery module, the first battery module and the second battery module are arranged on the two opposite sides of the limiting piece in the first direction respectively, each battery module comprises a plurality of battery cells arranged in the second direction, and the two ends of each battery cell are inserted into the corresponding limiting hole and the corresponding limiting support respectively; the first direction is perpendicular to the second direction, and the first direction corresponds to the length direction of the battery cell. According to the invention, the battery module is fixed in the shell by using the limiting piece, so that a battery pack shell is omitted, the assembly process of the energy storage power supply is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, and more particularly to an energy storage power supply. Background Technology

[0002] Energy storage power supplies include a casing and a battery pack. The battery pack includes multiple battery modules. Multiple cells in the battery modules are fixed together using cell brackets. When assembling an energy storage power supply, the battery modules need to be fixed inside the battery pack casing to form a battery pack first using cell brackets. 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 battery module, a limiting member, and an electronic control module. The housing has a cavity, and a limiting member is fixedly disposed within the cavity. Each limiting member has a set of limiting holes on opposite sides along a first direction, and each set of limiting holes includes multiple limiting holes arranged along a second direction. The battery module is disposed within the cavity and is divided into a first battery module and a second battery module. The first and second battery modules are respectively disposed on opposite sides of the limiting member along the first direction. Each battery module includes a cell support and multiple cells arranged along the second direction. One end of each cell is inserted into a limiting hole, and the other end is inserted into the cell support, which is fixed to the cavity. The electronic control module is disposed on one side of the battery module along the second direction and is electrically connected to the battery module. The first direction is perpendicular to the second direction and corresponds to the length direction of the battery cells.

[0005] In one embodiment, the outer shell includes a lid and a body, the lid and the body surrounding the receiving cavity, and the limiting member is integrally formed with the body.

[0006] In one embodiment, the limiting member further has a guide groove, which is coaxially disposed on the side of the limiting hole away from the other limiting hole group.

[0007] In one embodiment, a reinforcing rib is further provided on the bottom wall of the housing, the reinforcing rib extending along the first direction, and the cell support abutting against the reinforcing rib.

[0008] In one embodiment, the battery module further includes a busbar disposed on one side of the battery cell away from the limiting member. The busbar connects the positive and negative terminals of a plurality of adjacent battery cells in the same battery module, thereby connecting the plurality of battery cells in series and / or in parallel.

[0009] In one embodiment, the battery cell includes a pressure relief valve disposed at the end of the battery cell away from the limiting member.

[0010] In one embodiment, the two limiting holes disposed opposite each other along the first direction are not connected.

[0011] In one embodiment, the limiting member includes a partition and a limiting sleeve. The partition extends along the first direction and is connected to the outer shell. The limiting sleeve is provided on both opposite sides of the partition along the first direction, and the limiting hole is formed in the limiting sleeve.

[0012] In one embodiment, the two limiting holes disposed opposite each other along the first direction are coaxial.

[0013] In one embodiment, the electronic control module includes a base plate, an inverter module, a main control module, and a BMS module, wherein the inverter module, the main control module, and the BMS module are all integrated on the base plate.

[0014] The beneficial effects of this invention are: The aforementioned energy storage power supply uses limiting components to fix the battery modules inside the housing, directly integrating the battery modules into the housing of the energy storage power supply, eliminating the need for a battery pack housing and improving assembly efficiency. Furthermore, since two sets of battery modules share a single limiting component, the required material costs are low. Attached Figure Description

[0015] Figure 1 This is a 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 an internal front view of the energy storage power supply described in an embodiment of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the box body according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the battery module structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the battery cell support at one angle according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the battery cell support structure from another angle according to an embodiment of the present invention; Figure 9 This is a side view of the energy storage power supply described in an embodiment of the present invention; Figure 10 yes Figure 9 A sectional view along the BB direction; Figure 11 yes Figure 10 Enlarged view of point C in the middle; Figure 12 This is a schematic diagram of the battery cell structure according to an embodiment of the present invention.

[0016] In the picture: 1. Outer shell; 11. Cover; 12. Box body; 13. Reinforcing rib; 2. Battery module; 21. Cell; 211. Cell shell; 212. Terminal post; 213. Pressure relief valve; 22. Data acquisition component; 23. Busbar; 24. Cell bracket; 241. Baffle; 242. Connecting part; 243. Mounting sleeve; 244. Top plate; 245. Bottom plate; 246. Side plate; 247. Support part; 24a. Mounting hole; 24b. Second connecting hole; 24c. Clearance hole; 24d. Pressure relief hole; 3. Electronic control module; 4. Electrical connector; 6. Limiting component; 61. Partition; 62. Limiting sleeve; 63. Guide part; 6a. Limiting hole; 6b. Guide groove. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1-3 As shown, an embodiment of the present invention provides an energy storage power supply, including a housing 1, a battery module 2, a limiting member 6, and an electronic control module 3. The housing 1 includes a cover 11 and a body 12 disposed opposite to each other along a third direction (Z direction in the figure). The cover 11 and the body 12 are connected by means of bolt connection or snap-fit ​​and together enclose a receiving cavity. A limiting member 6 is provided inside the receiving cavity. The limiting member 6 has a group of limiting holes on both sides along the first direction (X direction in the figure). Each group of limiting holes has multiple limiting holes 6a arranged along the second direction (Y direction in the figure). The battery module 2 is also provided inside the receiving cavity. The battery module 2 is divided into a first battery module and a second battery module. The first battery module and the second battery module are respectively provided on both sides of the limiting member 6 along the first direction. Each battery module 2 includes a cell bracket 24 and multiple cells 21 arranged along the second direction. The first ends of the multiple cells 21 of the same battery module 2 are inserted into the limiting holes 6a of the same group of limiting holes one by one. The second ends of the multiple cells 21 of the same battery module 2 are inserted into the mounting holes 24a of the cell bracket 24. The cell bracket 24 is fixed to the receiving cavity. The electronic control module 3 is provided on one side of the battery module 2 that is opposite to it along the second direction and is electrically connected to the battery module 2. The first direction, the second direction, and the third direction are perpendicular to each other, and the first direction corresponds to the length direction of the cell 21, that is, the cell 21 extends along the first direction.

[0022] The aforementioned energy storage power supply uses a limiting member 6 mounted on the outer casing 1 to fix the battery module 2 inside the casing 1. The battery module 2 is directly integrated into the outer casing 1 of the energy storage power supply, eliminating the need for a battery pack casing and improving assembly efficiency. Moreover, since the two battery modules 2 share a single limiting member 6, the required material cost is low.

[0023] In one embodiment, the length of the limiting hole 6a along the first direction is not less than 10 mm. This is because if the length is too short, the limiting member 6 has limited effect on restricting the battery cell 21, and the battery will not pass the drop test during the energy storage power supply test.

[0024] In one embodiment, the battery cell 21 is a cylindrical battery cell. In this case, the limiting hole 6a and the mounting hole 24a can be set to be circular, and the diameter of the limiting hole 6a and the mounting hole 24a can be slightly smaller than the outer diameter of the battery cell 21, so that the limiting member 6 and the battery cell support 24 are interference-fitted with the battery cell 21, thereby increasing the stability of the battery cell 21 in the receiving cavity. Alternatively, the limiting hole 6a and the mounting hole 24a can also be clearance-fitted with the battery cell 21 to reduce the difficulty of inserting the battery cell 21 into the limiting hole 6a and the mounting hole 24a. Of course, the battery cell 21 can also be a square battery cell, and correspondingly, the limiting hole 6a and the mounting hole 24a are also set to be square and are interference-fitted or clearance-fitted with the battery cell 21.

[0025] refer to Figure 7 and Figure 8 As shown, the cell support 24 includes a baffle 241 and multiple mounting sleeves 243. The multiple mounting sleeves 243 are arranged along a second direction. Mounting holes 24a are formed one-to-one in the mounting sleeves 243 and pass through the mounting sleeves 243 along a first direction. The baffle 241 is disposed on the side of the mounting sleeve 243 away from the limiting member 6 to block the opening of the mounting hole 24a away from the limiting member 6, thereby cooperating with the limiting member 6 to axially limit the cell 21. Specifically, adjacent mounting sleeves 243 abut against each other to provide more mounting sleeves 243 in a limited accommodating cavity, thereby accommodating more cells 21 and increasing the energy storage capacity of the energy storage power supply.

[0026] refer to Figure 5 As shown, the limiting member 6 includes two sets of limiting sleeves arranged along a first direction. Each set of limiting sleeves includes multiple limiting sleeves 62 arranged along a second direction, and limiting holes 6a are formed in corresponding order on the limiting sleeves 62. More specifically, adjacent limiting sleeves 62 also abut against each other.

[0027] In one embodiment, the limiting member 6 is integrally formed with the box body 12 to further reduce the assembly process of the energy storage power supply and improve assembly efficiency.

[0028] Based on this, the battery module 2 needs to be placed inside the housing 12 first, and then the battery cell 21 is inserted into the limiting hole 6a along the axial direction of the limiting hole 6a. To reduce the difficulty of inserting the battery cell 21 into the limiting hole 6a, the limiting member 6 also has a guide groove 6b. The guide groove 6b is coaxially arranged on the side of the limiting hole 6a away from the opposite limiting hole group, and the opening of the guide groove 6b faces the housing cover 11. Based on the premise that the battery cell 21 is a cylindrical battery cell, the guide groove 6b is an arc-shaped groove.

[0029] Specifically, the limiting member 6 also includes a guide portion 63, which is connected to the end of the limiting sleeve 62, and a guide groove 6b is formed on the guide portion 63. When the battery cell 21 is assembled into the limiting hole 6a, it first rests on the guide portion 63 and then is inserted into the limiting sleeve 62 along the first direction.

[0030] Given that the limiting component 6 and the housing 12 are integrally formed, the length of the limiting hole 6a should not exceed 100mm. If the hole length is too large, after the battery cell 21 is inserted into the limiting hole 6a along the first direction, the distance between the end of the battery cell 21 away from the limiting component 6 and the side wall of the housing 12 along the first direction will be too large, resulting in an excessively large volume for the entire energy storage power supply, which is not conducive to the miniaturization of the energy storage power supply. Specifically, the length of the limiting hole 6a is not limited to 10mm, 20mm, 25mm, 50mm, 70mm, or 100mm.

[0031] Furthermore, the two limiting holes 6a arranged opposite each other along the first direction can be coaxial or non-coaxial. In the current embodiment, the two limiting holes 6a arranged opposite each other along the first direction are coaxial, so the first battery module and the second battery module are symmetrically arranged in the receiving cavity, which reduces the space occupied by the battery module 2 in the receiving cavity along the second direction, and is also conducive to the miniaturization of the energy storage power supply.

[0032] refer to Figure 12 As shown, the battery cell 21 includes a pressure relief valve 213 to release 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.

[0033] In one embodiment, in order to reduce the impact of a failed cell 21 on another cell 21 that is opposite to it along the first direction, a pressure relief valve 213 is provided at the end of the cell housing 211 away from the limiting member 6, and a pressure relief hole 24d is provided on the baffle 241 at the position corresponding to the pressure relief valve 213.

[0034] In another embodiment, pressure relief valves 213 are provided at both ends of the battery cell 21 that are arranged opposite to each other along the first direction. In this case, in order to reduce the impact of the pressure relief valve 213 located at the end of the battery cell 21 near the limiting member 6 on the other battery cell 21 that is opposite to it along the first direction when a battery cell 21 fails, the limiting holes 6a arranged opposite to each other along the first direction are not connected.

[0035] Specifically, refer to Figure 5 As shown, the limiting member 6 also includes a partition 61, which is made of an insulating material, such as insulating plastic. The partition 61 extends along the second direction and is perpendicularly connected to the box body 12. Two sets of limiting sleeves 62 are respectively disposed on opposite sides of the partition 61 along the first direction. Based on the premise that the partition 61 is made of plastic, the limiting member 6 and the box body 12 are integrally injection molded, that is, both the box body 12 and the limiting member 6 are made of plastic.

[0036] The separator 61 not only separates the cells 21 in the two battery modules 2 that are opposite each other along the first direction, thereby reducing the possibility of heat transfer between them and mitigating the impact of the failure of one cell 21 on the cell 21 that is opposite it along the first direction, but also works with the cell bracket 24 to limit the cell 21 along the first direction. Based on the premise that the cell 21 is a cylindrical cell, the separator 61 also increases the connection stability between the limiting sleeve 62 and the housing 12.

[0037] To connect the individual cells 21 within the same battery module 2, the battery module 2 also includes a busbar 23. The busbar 23 connects multiple adjacent cells 21 within the same battery module 2, thereby allowing the multiple cells 21 to be connected in series and / or in parallel. The busbar 23 can be made of copper, aluminum, nickel, or an alloy material, and can be electrically connected to the cells 21 through laser welding or compaction. To reduce the difficulty of connecting the busbar 23 to the cells 21, the busbar 23 is located on the side of the battery module 2 away from the limiting member 6.

[0038] refer to Figure 12 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 battery cell support 24. The battery cell support 24 has a clearance hole 24c for the terminal post 212 to pass through. The busbar 23 is disposed on the side of the battery cell support 24 facing away from the limiting member 6 and has multiple segments.

[0039] In the current embodiment, the two ends of each busbar are respectively connected to the cell housing 211 and the terminal post 212 of two adjacent cells 21 in the same battery module 2, that is, the cells 21 in the battery module 2 are connected in series through multiple busbars 23.

[0040] Since the cell housings 211 have the same polarity, the two limiting holes 6a of the limiting member 6, which are arranged opposite each other along the first direction, are not connected and can also separate the two cells 21 arranged opposite each other along the first direction in the two battery modules to prevent short circuit.

[0041] In one embodiment, the cell support 24 is detachably connected to the housing 12 to facilitate the removal of a battery module 2 from the housing 1, thereby allowing for the inspection or replacement of a specific cell 21. For example, the cell support 24 is bolted to the housing 12. Specifically, the cell support 24 has a second connecting hole 24b for fasteners to pass through, and the housing 12 has a first connecting hole. The cell support 24 is detachably connected via fasteners that pass through the second connecting hole 24b and the first connecting hole in a third direction. (Reference) Figure 7As shown, the battery cell bracket 24 also includes a connecting part 242. The baffle 241 is provided with connecting parts 242 on both sides of the second direction. The second connecting hole 24b is opened in the connecting part 242. The fastener can be a screw or a bolt that cooperates with a nut.

[0042] In one embodiment, the two battery modules are connected to a busbar 23 (hereinafter referred to as the end busbar) located at the end of the battery module 2 via an electrical connector 4. To reduce the difficulty of connecting the end busbar to the electrical connector 4, the cell support 24 further includes a top plate 244. The top plate 244 is located on the side of the mounting sleeve 243 facing away from the housing 12 and is connected to the baffle 241. A support portion 247 is provided at the end of the top plate 244. The support portion 247 provides support and limit for 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 23. Exemplarily, the end busbar is bolted to the electrical connector 4.

[0043] refer to Figure 5 , Figure 10 and Figure 11 As shown, a reinforcing rib 13 protrudes from the bottom wall of the box body 12 on the side facing the lid 11. The reinforcing rib 13 extends along the first direction and is disposed on the side of the box body 12 opposite to the lid 11, i.e., on the bottom wall of the box body 12. The cell support 24 abuts against the reinforcing rib 13. In addition to strengthening the structural strength of the box body 12, the reinforcing rib 13 also guides the cell support 24 when the cell 21 slides along the guide groove 6b.

[0044] Specifically, the cell support 24 also includes a base plate 245, which is disposed on the side of the mounting sleeve 243 facing the bottom wall of the housing 12 and connected to the baffle 241. The base plate 245 abuts against the reinforcing rib 13. In addition, the cell support 24 also includes side plates 246, which are provided on opposite sides of the base plate 245 along the second direction, and the connecting part 242 is disposed on the side plate 246.

[0045] Furthermore, multiple reinforcing ribs 13 are arranged along the second direction and are correspondingly set one-to-one with the limiting sleeve 62. The reinforcing ribs 13 are connected to the bottom surface of the limiting sleeve 62 to improve the structural strength of the limiting sleeve 62.

[0046] In one embodiment, the battery module 2 further includes a data acquisition unit 22 connected to the busbar 23. The data acquisition unit 22 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. The data acquisition unit 22 is prior art and will not be described in detail here.

[0047] refer to Figure 2 and Figure 3As shown, in one embodiment, the power control module 3 includes a base plate, an inverter module, a main control module, and a BMS module. The base plate is arranged perpendicular to a third direction, and the inverter module, main control module, and BMS module are all integrated on the base plate. Arranging the base plate perpendicular to a third direction can meet consumers' demand for ultra-thin energy storage power supplies.

[0048] Specifically, the electrical connector 4 for connecting the two battery modules 2 and the electrical connector 4 for connecting the electronic control module 3 are respectively connected to the end busbars located on both sides of the cell support 24 that are arranged opposite each other along the second direction. Moreover, the end of the partition 61 away from the electronic control module 3 is connected to the side wall of the housing 12 to further improve the structural strength of the limiting member 6, and the end of the partition 61 near the electronic control module 3 is rounded to reduce the possibility of damaging the electronic control module 3.

[0049] Based on the premise that the limiting component 6 and the box body 12 are integrally formed, when assembling the above-mentioned energy storage power supply, the battery cell 21 is first assembled on the battery cell bracket 24 to form the battery module 2. At the same time, the electronic control module 3 is fixed to the box body 12 by means of connection not limited to bolts or snap-fit. Then, the battery cell 21 is placed on the guide part 63, and the battery cell bracket 24 is placed on the reinforcing rib 13. Then, the battery module 2 is pushed into the limiting hole 6a along the guide part 63 until it abuts against the partition 61. At this time, the second connecting hole 24b and the first connecting hole are aligned. The battery cell bracket 24 is fixed to the box body 12 using fasteners. Then, the two battery modules 2 and the electronic control module 3 are connected by the electrical connector 4. Finally, the box cover 11 is assembled on the box body 12 to complete the installation of the energy storage power supply. The whole assembly process is simple and efficient, and makes reasonable use of the internal space of the outer shell 1.

[0050] 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 shell has a receiving cavity formed inside it, and a limiting member is fixedly disposed inside the receiving cavity. The limiting member has a group of limiting holes on both sides of opposite sides along a first direction. Each group of limiting holes includes a plurality of limiting holes arranged along a second direction. A battery module is disposed within the receiving cavity. The battery module is divided into a first battery module and a second battery module. The first battery module and the second battery module are respectively disposed on opposite sides of the limiting member along the first direction. Each battery module includes a cell bracket and a plurality of cells arranged along the second direction. One end of the cell is inserted into the limiting hole, and the other end of the cell is inserted into the cell bracket. The cell bracket is fixed to the receiving cavity. The electronic control module is disposed on one side of the battery module that is opposite to it along the second direction and is electrically connected to the battery module; 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 outer shell includes a lid and a body, the lid and the body forming the receiving cavity, and the limiting member is integrally formed with the body.

3. The energy storage power supply according to claim 2, characterized in that, The limiting member also has a guide groove, which is coaxially disposed on the side of the limiting hole away from the other limiting hole group.

4. The energy storage power supply according to claim 3, characterized in that, The two limiting holes, which are arranged opposite each other along the first direction, are coaxial.

5. The energy storage power supply according to claim 2, characterized in that, The bottom wall of the box is provided with reinforcing ribs, which extend along the first direction, and the cell support abuts against the reinforcing ribs.

6. The energy storage power supply according to claim 2, characterized in that, The battery cell includes a pressure relief valve, which is provided at the end of the battery cell away from the limiting member, and a pressure relief hole is provided on the battery cell bracket at the position corresponding to the pressure relief valve.

7. The energy storage power supply according to claim 6, characterized in that, The pressure relief valve is provided at one end of the battery cell near the limiting member, and the two limiting holes arranged opposite each other along the first direction are not connected.

8. The energy storage power supply according to claim 7, characterized in that, The limiting component includes a partition and a limiting sleeve. The partition extends along the first direction and is connected to the box body. The limiting sleeve is provided on both sides of the partition along the first direction. The limiting hole is formed in the limiting sleeve.

9. The energy storage power supply according to any one of claims 1-8, characterized in that, The battery module further includes a busbar, which is disposed on the side of the battery module away from the limiting member. The busbar connects the positive and negative terminals of multiple adjacent cells in the same battery module, so that the multiple cells are connected in series and / or in parallel.

10. The energy storage power source according to any one of claims 1-8, characterized in that, The electronic control module includes a base plate, an inverter module, a main control module, and a BMS module, all of which are integrated on the base plate.

Images