Battery pack and energy storage device

Abstract

The application relates to the technical field of battery energy storage, in particular to a battery pack and an energy storage device. The battery pack comprises an upper cover, the upper cover is provided with a first inclined surface, an avoiding space can be formed on one side of the battery pack, and the possibility of interference between the battery pack and a liquid cooling pipeline in the energy storage device can be reduced when the battery pack is installed. The battery pack comprises a mounting plate, a fixing piece, a plug-in piece and a copper bar, the mounting plate and the first inclined surface are located on the same side of the upper cover, the mounting plate is mounted on the upper cover through the fixing piece, the plug-in piece is mounted on the mounting plate, and the copper bar is connected with the plug-in piece, so that the battery pack can be charged and discharged through the plug-in piece. One side of the copper bar close to the fixing piece is provided with an inclined edge, the inclined edge is inclined away from the fixing piece in the direction close to the plug-in piece, the creepage distance between the copper bar and the fixing piece can be improved, and the risk of electric leakage is reduced.

Description

Technical Field

[0001] This application relates to the field of battery energy storage technology, and in particular to a battery pack and energy storage device. Background Technology

[0002] The battery pack generates heat during charging and discharging. A liquid cooling plate is installed at the bottom of the battery pack to control its temperature. Liquid cooling pipes are located on both sides of the battery pack, connecting to the liquid cooling plate to supply coolant. Currently, the space on the sides of the battery pack to accommodate the liquid cooling pipes is small. During the assembly of the energy storage device, the battery pack is prone to interference with the liquid cooling pipes, leading to damage. Providing clearance on the sides of the battery pack would reduce the internal storage volume, potentially causing electrical problems for the electronic components within the battery pack. Summary of the Invention

[0003] This application provides a battery pack and energy storage device to solve the problem that the battery pack is prone to interference with liquid cooling pipelines.

[0004] This application relates to a battery pack, the battery pack comprising: The upper cover has a first inclined surface; Mounting plate, the mounting plate and the first inclined surface are located on the same side of the upper cover; A fastener is provided, through which the mounting plate is connected to the upper cover; A connector, which is mounted on the mounting plate; A copper busbar is connected to the connector. The side of the copper busbar near the fixing member has a bevel, and the bevel is inclined away from the fixing member along the direction close to the connector.

[0005] This application also relates to an energy storage device, which includes a container, liquid cooling pipelines and multiple battery packs, wherein the liquid cooling pipelines and multiple battery packs are all located inside the container, and the liquid cooling pipelines are located on the side of the battery packs, and the battery packs are as described above.

[0006] The beneficial effects of this application are as follows: The top cover has a first bevel, which creates clearance space on the side of the battery pack, reducing the possibility of interference between the battery pack and the liquid cooling lines in the energy storage device during installation. The copper busbar connects to the connector, allowing the battery pack to charge and discharge. The side of the copper busbar closest to the mounting bracket has a bevel, which slopes away from the mounting bracket along the direction closest to the connector. This increases the creepage distance between the copper busbar and the mounting bracket, reducing the risk of leakage and improving the safety of the battery pack.

[0007] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the energy storage device provided in the embodiments of this application; Figure 3 A partial structural diagram of the internal structure of the energy storage device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure within the battery pack housing space provided in an embodiment of this application; Figure 5 for Figure 4 A magnified view of the area at position I in the middle; Figure 6 This is a structural schematic diagram of the battery pack housing space from another angle, provided in an embodiment of this application. Figure 7 for Figure 6 A magnified view of a portion of position II; Figure 8 This is a schematic diagram of the structure of the copper busbar provided in an embodiment of this application; Figure 9 This is a structural schematic diagram of the copper busbar provided in an embodiment of this application from another angle; Figure 10 for Figure 6 A magnified view of a portion of position III; Figure 11 for Figure 6 A magnified view of the central IV position; Figure 12 This is a schematic diagram of the mounting plate provided in an embodiment of this application.

[0010] Figure label: 100-battery pack; 200 - Energy storage device; 201 - Container; 202 - Liquid cooling piping; 203-Support frame; 1-Outer shell; 11-Top cover; 111 - First inclined plane; 112 - First cover plate; 113 - Second cover plate; 114 - Connecting flange; 115-Second slope; 12-Base plate; 121 - Third inclined plane; 122-Connector; 123 - First crossbeam; 124 - Second crossbeam; 13-Fuse; 14-Accommodation space; 15-cell; 16-Insulation box; 17-Battery module; 171 - First battery module; 172 - Second battery module; 173 - Third battery module; 174 - Fourth battery module; 2-Mounting plate; 21-First Installation Section; 22 - First opening; 23 - Second opening; 24-Second Installation Section; 25-Third Installation Department; 3-Factors; 4-Connector; 41 - Positive terminal connector; 42-Negative terminal connector; 43- Bolt; 431 - Head; 432-shaft; 5- Copper busbar; 51-Hypotenuse; 52-Main body; 521 - First paragraph; 522 - Second paragraph; 53-First connecting part; 54 - Protective Cover; 55 - Positive copper busbar; 56 - Negative electrode copper busbar; 57-Second connecting part; 58 - Connecting copper busbar; 581 - Third paragraph; 582 - Paragraph 4; 59 - Limiting component; 6- Battery Management System; 61-Main control board; 62 - Slave control board; 7-Explosion-proof valve; 8-Maintenance switch; 9-Information Acquisition Connector. Detailed Implementation

[0011] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0012] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0013] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0014] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0015] In the description of the embodiments of this application, the use of terms such as "same," "equal," or "consistent" regarding dimensions does not require absolute mathematical or geometric precision. Given the actual manufacturing, measurement, and material factors, those skilled in the art should understand that the aforementioned dimensional terms include deviations within permissible limits or unavoidable deviations. As long as such deviations do not affect the functionality and technical effects of the corresponding dimensions in this application, they should be considered to fall within the meaning of "same dimensions" as described in the embodiments of this application.

[0016] like Figure 1 As shown, this application provides a battery pack 100, including an upper cover 11 and a base plate 12. The upper cover 11 includes a connecting flange 114, and the upper cover 11 is connected to the base plate 12 through the connecting flange 114. The upper cover 11 includes a first inclined surface 111, the connecting flange 114 includes a second inclined surface 115, and the base plate 12 includes a third inclined surface 121. Along the height direction of the battery pack 100, i.e., the third direction Z, the first inclined surface 111, the second inclined surface 115, and the third inclined surface 121 are aligned to form a clearance space on the side of the battery pack 100.

[0017] like Figure 2 As shown, this application provides an energy storage device 200, which includes a container 201 and multiple battery packs 100. Multiple support frames 203 are provided inside the container 201 to support the battery packs 100, allowing the battery packs 100 to be spaced apart within the container 201. A liquid cooling pipeline 202 is also provided inside the container 201. The liquid cooling pipeline 202 is located on the side of the battery pack 100 and connected to a liquid cooling plate within the battery pack 100, allowing the liquid cooling pipeline 202 to supply coolant to the liquid cooling plate to control the temperature of the battery pack 100.

[0018] When assembling the energy storage device 200, the liquid cooling pipes 202 and support frames 203 can be pre-installed inside the container 201, with the liquid cooling pipes 202 located between two adjacent support frames 203. Then, the battery pack 100 is installed on the support frames 203, and the liquid cooling pipes 202 are connected to the liquid cooling plates in the battery pack 100, improving the assembly efficiency of the energy storage device 200. The first inclined surface 111, the second inclined surface 115, and the third inclined surface 121 in the battery pack 100 form clearance spaces on the sides of the battery pack 100. The liquid cooling pipes 202 are located on the side of the battery pack 100 with these clearance spaces. During battery pack 100 installation, this reduces the possibility of interference between the battery pack 100 and the liquid cooling pipes 202 or other wiring harnesses inside the container 201, and also reduces the possibility of damage to the liquid cooling pipes 202 during the assembly of the energy storage device 200.

[0019] like Figure 3 , Figure 4 and Figure 5 As shown, in one possible embodiment, the battery pack 100 has a first direction and a second direction that are perpendicular to each other. The first direction is the width direction Y of the battery pack 100, and the second direction is the length direction X of the battery pack 100. Along the first direction Y, the liquid cooling pipes 202 are located on both sides of the battery pack 100. The first inclined surface 111, the second inclined surface 115, and the third inclined surface 121 form clearance spaces on both sides of the battery pack 100 in the first direction Y, so that the clearance spaces can avoid the liquid cooling pipes 202. Along the first direction Y, the dimension d1 of the second inclined surface 115 is 20mm to 150mm, and along the second direction X, the dimension d2 of the second inclined surface 115 is 20mm to 150mm. That is, the clearance space formed by the second inclined surface 115 on the side of the battery pack 100 is a right triangle, and the two legs of the right triangle are both 20mm to 150mm. The dimensions of the two legs can be the same or different.

[0020] The second inclined plane 115 has a dimension d1 greater than or equal to 150 mm along the first direction Y and a dimension d2 greater than or equal to 150 mm along the second direction X. This can create sufficient clearance space on the side of the battery pack 100 to avoid the liquid cooling pipe 202 and reduce the possibility of damage to the liquid cooling pipe 202. When assembling the energy storage device 200, the liquid cooling pipe 202 can be installed in the container 201 first, and then the battery pack 100 can be installed on the support frame 203, which helps to improve the assembly efficiency of the energy storage device 200. The upper cover 11 and the bottom plate 12 form an enclosure space 14, in which the battery cell 15, copper busbar 5, wire harness and other devices are placed. The clearance space formed by the first inclined surface 111, the second inclined surface 115 and the third inclined surface 121 will affect the capacity of the enclosure space 14. The dimension d1 of the second inclined surface 115 along the first direction Y is less than or equal to 20mm, and the dimension d2 of the second inclined surface 115 along the second direction X is less than or equal to 20mm. This can limit the size of the clearance space, reduce the impact on the enclosure space 14, reduce the possibility that the number of battery cells 15 in the enclosure space 14 will be affected, and help improve the energy storage capacity of the battery pack 100. Therefore, the dimension d1 of the second inclined plane 115 along the first direction Y can be 20mm, 90mm, 150mm, etc., or other values ​​within the above range. Optionally, d1 can be 60mm to 70mm. The dimension d2 along the second direction X can be 20mm, 90mm, 150mm, etc., or other values ​​within the above range. Optionally, d2 can be 35mm to 45mm. This can avoid the liquid cooling pipe 202 while also reducing the impact on the energy storage capacity of the battery pack 100.

[0021] like Figure 1 As shown, in one possible embodiment, a connector 122 is provided on the base plate 12 for connecting the battery pack 100 and the support frame 203. The connector 122 is located on the side of the base plate 12 where the third inclined surface 121 is provided.

[0022] The base plate 12 includes a first crossbeam 123 and a second crossbeam 124, which are perpendicular to each other. The first crossbeam 123 extends along a first direction Y, and the second crossbeam 124 extends along a second direction X. A connector 122 is connected to the front end of the support frame 203. When the base plate 12 is provided with a third inclined surface 121, the length of the second crossbeam 124 is reduced, creating a gap between the second crossbeam 124 and the front end of the support frame 203. This allows the connector 122 to be transferred from the second crossbeam 124 to the first crossbeam 123 for easier connection with the support frame 203.

[0023] like Figure 5 , Figure 6 and Figure 7As shown, in one possible embodiment, the battery pack 100 includes a mounting plate 2, a fixing member 3, a connector 4, and a copper busbar 5. The mounting plate 2 and the first inclined surface 111 are located on the same side of the upper cover 11. The mounting plate 2 and the upper cover 11 are connected by the fixing member 3. The connector 4 is mounted on the mounting plate 2. One end of the copper busbar 5 is connected to the battery cell 15, and the other end is connected to the connector 4, so that the battery cell 15 and the connector 4 are electrically connected. The so-called electrical connection means that, for those familiar with the art, since the material of the copper busbar 5 is a conductive material, there is an electrical connection between the battery cell 15 and the connector 4 when the device is in a discharging or charging state. The charging and discharging of the battery cell 15 can be realized through the connector 4. The side of the copper busbar 5 near the fixing member 3 has an inclined edge 51, which slopes away from the fixing member 3 along the direction close to the connector 4.

[0024] Since the mounting plate 2 and the first inclined surface 111 are located on the same side of the upper cover 11, the size of the side of the upper cover 11 used for connecting with the mounting plate 2 is reduced, thus the distance between the connector 4 and the fixing member 3 is smaller. The fixing member 3 is made of conductive metal, which can improve the connection strength between the mounting plate 2 and the upper cover 11. If the creepage distance between the copper busbar 5 and the fixing member 3 is small, there is a risk of leakage. An inclined edge 51 is provided on the side of the copper busbar 5 near the fixing member 3, which can increase the creepage distance between the copper busbar 5 and the fixing member 3, thereby reducing the risk of leakage.

[0025] In one possible embodiment, a sealing strip is provided between the mounting plate 2 and the top cover 11, which can reduce the possibility of moisture entering the containing space 14 and help improve the service life of the battery cell 15 and other electrical components in the containing space 14. Multiple fasteners 3 are arranged at intervals around the mounting plate 2 to improve the connection strength between the mounting plate 2 and the top cover 11, and also to improve the sealing effect of the sealing strip.

[0026] like Figure 5 , Figure 6 and Figure 7 As shown, in one possible embodiment, the copper busbar 5 includes a main body 52, a first connecting portion 53, and a second connecting portion 57. The first connecting portion 53 and the second connecting portion 57 are located at opposite ends of the main body 52. ​​The portion of the second connecting portion 57 away from the first connecting portion 53 is connected to the battery cell 15, and the portion of the first connecting portion 53 away from the main body 52 is connected to the connector 4. The main body 52 is arranged parallel to the mounting plate 2. The first connecting portion 53 extends along the second direction X towards the mounting plate 2 to facilitate connection with the connector 4. The third direction Z is the width direction of the first connecting portion 53, and the width of the first connecting portion 53 can be 40mm to improve its conductivity. The inclined edge 51 is located at the first connecting portion 53, which can increase the distance between the first connecting portion 53 and the fixing member 3, thereby reducing the risk of leakage. Figure 8As shown, along the second direction X, the dimension d3 of the hypotenuse 51 is 10mm to 40mm, and along the third direction Z, the dimension d4 of the hypotenuse 51 is 10mm to 20mm. That is, one of the two legs of the right triangle formed by the hypotenuse 51 is 10mm to 40mm, and the other is 10mm to 20mm.

[0027] Along the third direction Z, one side of the first connecting portion 53 has a fixing member 3. The fixing member 3 extends along the second direction X. The dimension d3 of the inclined side 51 along the second direction X is greater than or equal to 10 mm, and the dimension d4 along the third direction Z is greater than or equal to 10 mm. This increases the distance between the inclined side and the fixing member 3, improves the creepage distance between the first connecting portion 53 and the fixing member 3, and reduces the risk of leakage of the battery pack 100. The first connecting portion 53 is provided with an inclined side 51. Along the direction away from the main body 52, the cross-sectional area of ​​the first connecting portion 53 gradually decreases, so the resistance of the first connecting portion 53 gradually increases. The dimension d3 of the inclined side 51 along the second direction X is less than or equal to 40 mm, and the dimension d4 along the third direction Z is less than or equal to 20 mm. This increases the cross-sectional area of ​​the first connecting portion 53, improves the conductivity of the first connecting portion 53, and is beneficial to improving the charging and discharging efficiency of the battery cell 15. Therefore, along the second direction X, the dimension d3 of the hypotenuse 51 can be 10mm, 25mm, 40mm, etc., or other values ​​within the above range. Optionally, d3 can be 30mm to 40mm. Along the third direction Z, the dimension d4 of the hypotenuse 51 can be 10mm, 15mm, 20mm, etc., or other values ​​within the above range. Optionally, d1 can be 15mm to 20mm. This can both give the first connecting part 53 a certain conductivity and increase the distance between the first connecting part 53 and the fixing member 3 to reduce the possibility of leakage.

[0028] like Figure 9 As shown, in one possible embodiment, the copper busbar 5 includes a protective sleeve 54, a main body 52 located inside the protective sleeve 54, and a first connecting portion 53 and a second connecting portion 57 extending out of the protective sleeve 54 to facilitate connection with the connector 4 and the battery cell 15.

[0029] The main body 52 extends along the first direction Y within the battery pack 100. The protective sleeve 54 is an insulating structure, which can reduce the possibility of conductive parts within the battery pack 100 coming into contact with the main body 52, thereby improving the safety of the battery pack 100.

[0030] like Figure 5 and Figure 7As shown, in one possible embodiment, the connector 4 includes a positive connector 41 and a negative connector 42, and the copper busbar 5 includes a positive copper busbar 55 and a negative copper busbar 56. One end of the positive copper busbar 55 is connected to the positive terminal of the battery cell 15, and the other end is connected to the positive connector 41. One end of the negative copper busbar 56 is connected to the negative terminal of the battery cell 15, and the other end is connected to the negative connector 42. The mounting plate 2 includes a first mounting portion 21, on which both the positive connector 41 and the negative connector 42 are mounted. The positive connector 41 and the negative connector 42 are located diagonally opposite each other in the first mounting portion 21 to increase the spacing between them.

[0031] The mounting plate 2 and the first inclined surface 111 are located on the same side of the upper cover 11. Along the first direction Y, the upper cover 11 has the first inclined surface 111 at one or both ends, which reduces the size of the upper cover 11, thereby reducing the size of the first mounting plate 2, and consequently reducing the size of the first mounting portion 21. By placing the positive terminal connector 41 and the negative terminal connector 42 at diagonally opposite positions of the first mounting portion 21, the electrical distance between the positive terminal connector 41 and the negative terminal connector 42 can be increased, reducing the possibility of air breakdown, leakage, or short circuit, which is beneficial to improving the electrical safety of the battery pack 100.

[0032] like Figure 5 and Figure 7 As shown, in one possible embodiment, a plurality of fasteners 3 are arranged circumferentially along the first mounting portion 21. As the size of the top cover 11 is reduced, the distance between the fasteners 3 and the first mounting portion 21 is also reduced. The positive copper busbar 55 is connected to the positive plug 41 on the side away from the fastener 3, and the negative copper busbar 56 is connected to the negative plug 42 on the side away from the fastener 3, so as to increase the distance between the positive copper busbar 55 and the negative copper busbar 56 and the fastener 3, thereby reducing the possibility of air breakdown between the copper busbar 5 and the fastener 3, which is beneficial to reducing the risk of leakage of the battery pack 100.

[0033] Both the positive copper busbar 55 and the negative copper busbar 56 are fixed to the connector 4 by bolts 43. Bolt 43 includes a head 431 and a shaft 432. The shaft 432 is threaded to connect the copper busbar 58 and the connector 4. The head 431 of the bolt 43 protrudes significantly beyond the copper busbar 5 or the connector 4. The head 431 is located on the side of the copper busbar 5 away from the connector 4, which increases the distance between the bolt 43 and the fixing member 3. Both the bolt 43 and the fixing member 3 are made of conductive material, which reduces the possibility of air breakdown between the bolt 43 and the fixing member 3, and helps to reduce the risk of leakage in the battery pack 100.

[0034] like Figure 6 and Figure 10As shown, in one possible embodiment, the battery pack 100 includes a fuse 13, and an insulating box 16 is disposed between the battery cell 15 and the mounting plate 2. The fuse 13 is located inside the insulating box 16 to reduce the possibility of the fuse 13 coming into contact with other conductive parts inside the battery pack 100. The main body 52 includes a first segment 521 and a second segment 522, which are respectively connected to both ends of the fuse 13. The end of the first segment 521 away from the fuse 13 is connected to the battery cell 15, and the end of the second segment 522 away from the fuse 13 is connected to the connector 4.

[0035] The copper busbar 5 connects the battery cell 15 and the connector 4, enabling the battery cell 15 to be charged and discharged through the connector 4. When a short circuit occurs in the battery pack 100, the current in the copper busbar 5 increases. A fuse 13 is installed between the first section 521 and the second section 522. When the current is too large, the fuse 13 melts and cuts off the circuit, which can improve the safety of the battery pack 100.

[0036] like Figure 4 As shown, in one possible embodiment, multiple battery cells 15 are arranged in a matrix within the accommodating space 14. These multiple cells 15, arranged along the second direction X, are connected in series to form a battery module 17. The multiple battery modules 17 are spaced apart along the first direction Y. Copper busbars 5 are provided on both the side of the multiple battery modules 17 closest to the mounting plate 2 and the side furthest from the mounting plate 2 to connect the multiple battery modules 17 in series. Taking a space 14 containing four battery modules 17 as an example, along the first direction Y, the four battery modules 17 are respectively a first battery module 171, a second battery module 172, a third battery module 173, and a fourth battery module 174. A positive copper busbar 55 is provided on the side of the first battery module 171 near the mounting plate 2 to connect the positive terminal of the first battery module 171 to the positive connector 41 via the positive copper busbar 55; connecting copper busbars 58 are provided on the first battery module 171 and the second battery module 172 away from the mounting plate 2 to connect the negative terminal of the first battery module 171 and the positive terminal of the second battery module 172; near the mounting plate 2, the second battery module 172 and the third battery module 173... A connecting copper busbar 58 is provided on one side to connect the negative terminal of the second battery module 172 and the negative terminal of the third battery module 173; a connecting copper busbar 58 is provided on the side of the third battery module 173 and the fourth battery module 174 away from the mounting plate 2 to connect the negative terminal of the third battery module 173 and the positive terminal of the fourth battery module 174; a negative copper busbar 56 is provided on the side of the fourth battery module 174 close to the mounting plate 2 to connect the negative terminal of the fourth module and the negative connector 42. Multiple connecting copper busbars 58 can connect multiple battery modules 17 in series, and the positive copper busbar 55 and the negative copper busbar 56 can connect multiple battery modules 17 to the connector 4, so that multiple battery modules 17 can be charged and discharged through the connector 4.

[0037] like Figure 4 , Figure 6 and Figure 11 As shown, in one possible embodiment, the battery pack 100 includes a maintenance switch 8 (Manual Service Disconnect, MSD). One of a plurality of connecting copper busbars 58 is connected to the maintenance switch 8. The maintenance switch 8 divides the connecting copper busbars 58 into a third segment 581 and a fourth segment 582. The third segment 581 and the fourth segment 582 are electrically connected to the two ends of the maintenance switch 8, respectively, to connect the third segment 581 and the fourth segment 582. A fuse structure is provided inside the maintenance switch 8. In the event of a short circuit, the current between the third segment 581 and the fourth segment 582 is large, causing the fuse structure to break, thereby cutting off the circuit and improving the safety of the battery pack 100. During maintenance, the maintenance switch 8 can be pulled out to disconnect the third segment 581 and the fourth segment 582, cutting off the circuit and improving the safety of maintenance personnel.

[0038] like Figure 6 As shown, in one possible embodiment, the battery pack 100 includes a battery management system (BMS) 6 for monitoring the status of the battery cells 15. The battery management system 6 includes a main control board 61 and a slave control board 62. The slave control board 62 is connected to multiple battery cells 15 to collect parameters such as voltage, current, and temperature of the battery cells 15 and transmits the collected parameters to the main control board 61. The main control board 61 can estimate the state of charge, state of health, and state of power of the battery cells 15 based on the parameters collected by the slave control board 62. When the voltages of multiple battery cells 15 are inconsistent, the main control board 61 controls the slave control board 62 to passively or actively balance the battery cells 15 with excessively high or low voltages to ensure the consistency of the multiple battery cells 15.

[0039] like Figure 6 and Figure 12 As shown, the mounting plate 2 includes a first opening 22 and a second opening 23, which are spaced apart. The main control board 61 is aligned with the first opening 22, and the slave control board 62 is aligned with the second opening 23.

[0040] The main control board 61 and the slave control board 62 have multiple electronic components. The staff needs to inspect and repair the electronic components. The main control board 61 is aligned with the first opening 22, and the slave control board 62 is aligned with the second opening 23, so that the staff can inspect and repair the main control board 61 and the slave control board 62 through the first opening 22 and the second opening 23, which helps to reduce the difficulty of inspection and repair.

[0041] like Figure 1 and Figure 12 As shown, in one possible embodiment, the mounting plate 2 includes a third mounting portion 25, which is located on the side of the second opening 23 away from the first opening 22, and an information acquisition connector 9 is mounted on the third mounting portion 25.

[0042] The voltage, temperature and other information of the cell 15 collected from the control board 62 can be transmitted to the battery cluster management system of the energy storage device 200 through the information acquisition connector 9 to monitor the working status of the cell 15 in the entire battery pack 100.

[0043] In one possible embodiment, the top cover 11 has multiple mounting holes on one side with the first inclined surface 111. When the mounting plate 2 is installed on the top cover 11, the first opening 22 and the second opening 23 in the mounting plate 2 are aligned with the two mounting holes in the top cover 11, respectively. The size of the mounting holes is the same as the size of the corresponding first opening 22 and second opening 23, so that when the operator repairs the main control board 61 or the slave control board 62, the top cover 11 does not need to be removed from the base plate 12, simplifying the repair process. The first mounting portion 21, the second mounting portion 24, and the third mounting portion 25 in the mounting plate 2 all protrude in a direction away from the battery cell 15. When the mounting plate 2 is installed on the top cover 11, the first mounting portion 21, the second mounting portion 24, and the third mounting portion 25 are respectively aligned with three different mounting holes and extend out of the receiving space 14 from the mounting holes. This not only restricts the relative position between the mounting plate 2 and the top cover 11, but also allows the connector 4, the maintenance switch 8, and the information acquisition connector 9 to be located outside the receiving space 14, so that the staff can easily plug the wire harness into the connector 4 and the information acquisition connector 9, and easily plug and unplug the maintenance switch 8.

[0044] like Figure 6 and Figure 9 As shown, in one possible embodiment, the control board 62 is connected to the battery cell 15 via wiring harnesses, circuit boards, etc., to collect information such as voltage and temperature of the battery cell 15. The control board 62 and the information acquisition head can be connected via wiring harnesses, as well as connections to other devices in the housing space 14, so that the housing space 14 contains multiple wiring harnesses. Figure 8 and Figure 9 As shown, the copper busbar 5 is provided with multiple limiting members 59, and the wire harness is located within the limiting members 59 to limit the position of the wire harness in the receiving space 14 and reduce the possibility of short circuit caused by the wire harness contacting other electrical components in the receiving space 14.

[0045] like Figure 1 As shown, in one possible embodiment, the upper cover 11 includes a first cover plate 112 and a second cover plate 113. Both the first cover plate 112 and the second cover plate 113 are detachably mounted on the mounting plate 2. The first cover plate 112 can block the first opening 22, and the second cover plate 113 can block the second opening. The first cover plate 112 and the second cover plate 113 can seal the main control board 61 and the slave control board 62 within the receiving space 14, reducing the possibility of moisture or other impurities in the environment coming into contact with the main control board 61 or the slave control board 62, which could lead to malfunction of the main control board 61 or the slave control board 62.

[0046] In one possible embodiment, the first cover plate 112 and the second cover plate 113 are detachably mounted on the side of the mounting hole away from the mounting plate 2, allowing the operator to remove the first cover plate 112 and the second cover plate 113 without removing the upper cover 11 from the base plate 12. A sealing strip is provided between the first cover plate 112 and the upper cover 11, and a sealing strip is also provided between the second cover plate 113 and the upper cover 11. This allows the first cover plate 112 and the second cover plate 113 to seal the mounting hole and reduce the amount of moisture entering the receiving space 14 through the mounting hole, thereby improving the service life of the battery cell 15 and other electronic components within the receiving space 14.

[0047] like Figure 1 As shown, in one possible embodiment, an explosion-proof valve 7 is provided on the first cover plate 112, or on the second cover plate 113, or both the first cover plate 112 and the second cover plate 113 are provided with explosion-proof valves 7.

[0048] The containment space 14 is a sealed space. During multiple charge and discharge cycles, the battery cell 15 will generate gas. As the battery pack 100 operates for longer periods, the gas in the containment space 14 gradually accumulates, causing the gas pressure in the containment space 14 to gradually increase, which increases the safety hazard.

[0049] An explosion-proof valve 7 is provided on the first cover plate 112 or the second cover plate 113. When the gas pressure in the containment space 14 reaches the preset pressure, the gas in the containment space 14 can be discharged through the explosion-proof valve 7, thereby controlling the pressure in the containment space 14 and improving the safety of the battery pack 100.

[0050] The containment space 14 has multiple battery modules 17, which are spaced apart along a first direction Y. In one possible embodiment, the explosion-proof valve 7 is aligned with the gap between two adjacent battery modules 17 so that gas in the containment space 14 can be discharged by the explosion-proof valve 7.

[0051] like Figure 1 As shown, in one possible embodiment, the mounting plate 2 includes a second mounting portion 24 located between the first opening 22 and the second opening 23. The maintenance switch 8 is mounted on the second mounting portion 24 so that when the main control board 61 or the slave control board 62 is under maintenance, the maintenance switch 8 can be easily removed by the operator, thereby improving the safety of the maintenance process.

[0052] The top cover 11 is provided with a first inclined surface 111, which reduces the size of the mounting plate 2 in the first direction Y. The size of the second mounting part 24 in the first direction Y can be as small as 82mm, and the size in the third direction Z can be as small as 80mm, so that the maintenance switch 8 can be installed in the second mounting part 24.

[0053] In one possible embodiment, the battery pack 100 includes a fire nozzle located outside the receiving space 14 and mounted on a second mounting portion 24.

[0054] In the event of thermal runaway or open flame in the battery pack 100, the fire nozzle can spray extinguishing agent to reduce the temperature of the battery pack 100 and extinguish the open flame, reducing the possibility of further spread of danger. Along the first direction Y, the second mounting part 24 is located in the middle of the mounting plate 2. Installing the fire nozzle on the second mounting part 24 can increase the coverage area of ​​the fire nozzle and improve the cooling effect of the fire nozzle in the event of thermal runaway in the battery pack 100.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application, or the scope of this application should be defined by the appended claims.

Claims

1. A battery pack, characterized in that, The battery pack includes: The upper cover has a first inclined surface; Mounting plate, the mounting plate and the first inclined surface are located on the same side of the upper cover; A fastener is provided, through which the mounting plate is connected to the upper cover; A connector, which is mounted on the mounting plate; A copper busbar is connected to the connector. The copper busbar has a beveled edge on the side near the fixing member, and the beveled edge is inclined away from the fixing member along the direction near the connector. The connector includes a positive connector and a negative connector, and the copper busbar includes a positive copper busbar and a negative copper busbar. The positive copper busbar is connected to the side of the positive connector away from the fixing member, and the negative copper busbar is connected to the side of the negative connector away from the fixing member.

2. The battery pack according to claim 1, characterized in that, The top cover includes a connecting flange, the battery pack includes a base plate, the connecting flange is connected to the base plate, the connecting flange has a second inclined surface, along a first direction, the dimension d1 of the second inclined surface is 20mm to 150mm, along a second direction, the dimension d2 of the second inclined surface is 20mm to 150mm; the first direction and the second direction are perpendicular to each other.

3. The battery pack according to claim 1, characterized in that, The copper busbar includes a main body and a first connecting part, the first connecting part being connected to the plug-in; the inclined side is located at the first connecting part, along the second direction, the dimension d3 of the inclined side is 10mm to 40mm, along the third direction, the dimension d4 of the inclined side is 10mm to 20mm, and the second direction is perpendicular to the third direction.

4. The battery pack according to claim 3, characterized in that, The copper busbar includes a protective sleeve, and the main body is located inside the protective sleeve.

5. The battery pack according to claim 1, characterized in that, The mounting plate includes a first mounting portion, and the positive terminal connector and the negative terminal connector are located diagonally opposite each other in the first mounting portion.

6. The battery pack according to claim 1, characterized in that, The mounting plate includes a first opening and a second opening, which are spaced apart; the battery pack includes a main control board and a slave control board, with the main control board aligned with the first opening and the slave control board aligned with the second opening.

7. The battery pack according to claim 6, characterized in that, The upper cover includes a first cover plate, which blocks the first opening; an explosion-proof valve is provided on the first cover plate.

8. The battery pack according to claim 6, characterized in that, The upper cover includes a second cover plate, which blocks the second opening, and an explosion-proof valve is provided on the second cover plate.

9. The battery pack according to claim 6, characterized in that, The mounting plate includes a second mounting portion located between the first opening and the second opening; the battery pack includes a maintenance switch mounted on the second mounting portion.

10. The battery pack according to claim 9, characterized in that, The battery pack includes a fire nozzle, which is mounted on the second mounting portion.

11. The battery pack according to claim 6, characterized in that, The mounting plate includes a third mounting portion located on the side of the second opening away from the first opening; the battery pack includes an information acquisition connector, which is mounted on the third mounting portion.

12. The battery pack according to claim 1, characterized in that, The battery pack includes a fuse, and the copper busbar includes a first section and a second section, which are respectively connected to both ends of the fuse.

13. The battery pack according to claim 1, characterized in that, The battery pack includes a base plate, and the top cover is mounted on the base plate; the base plate has a third inclined surface, which is aligned with the first inclined surface, and a connector is provided on one side of the base plate having the third inclined surface.

14. An energy storage device, characterized in that, The energy storage device includes a container, liquid cooling pipelines, and multiple battery packs, all of which are located inside the container, with the liquid cooling pipelines located on the side of the battery packs, and the battery packs being any of claims 1 to 13.

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