Battery pack and energy storage cabinet

Abstract

The present disclosure provides a battery pack and a battery cabinet, and belongs to the technical field of energy storage. The battery pack comprises a battery module and an integrated busbar. The integrated busbar comprises an insulating support, a connecting busbar and a sampling plate. The insulating support comprises a flue and a plurality of channels. The groove bottom of the flue is directed to the explosion-proof valve of a column of battery cells, and the two side walls of the flue are located on both sides of the explosion-proof valve of the column of battery cells. The groove bottom of the flue is provided with openings of the plurality of channels, one end of the side wall of the plurality of channels is connected with the openings, and the other end of the side wall of the plurality of channels is connected with the battery cells. The temperature sensor electrically connected with the sampling plate penetrates through the channel to contact the battery cells, the position of the channel is staggered with the explosion-proof valve of the battery cells, and the side wall of the plurality of channels separates the temperature sensor and the explosion-proof valve of the battery cells. The temperature sensor in the battery pack provided by the present disclosure can collect the temperature of the battery cells. Moreover, since the inside of the channel is separated from the inside of the flue, the smoke sprayed by the explosion-proof valve of the battery cells will not flow along the channel to the side of the integrated busbar away from the battery module.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of energy storage, and in particular, to a battery pack and a battery cabinet. BACKGROUND

[0002] The battery pack includes a battery module and an integrated busbar. The integrated busbar can also be referred to as a cells contact system (CCS).

[0003] In the related art, the integrated busbar includes a connection busbar and a sampling plate, and the connection busbar and the sampling plate are pressed together by a hot stamping film. The connection busbar connects the cells in the battery module in series or in parallel. The sampling plate is electrically connected to the connection busbar, and is used to collect the temperature of the connection busbar and send the collected temperature to a battery management unit (BMU).

[0004] However, the temperature of the connection busbar obtained by the battery management unit does not accurately represent the temperature of the cells, which is not conducive to the temperature control protection of the cells by the battery management unit, and reduces the safety of the battery pack. In addition, when the cells are in thermal runaway, a large amount of smoke will be sprayed out. If the smoke spreads randomly, it will corrode the connection busbar and the sampling plate, and will further worsen the thermal runaway phenomenon of the battery pack, which also reduces the safety of the battery pack. SUMMARY

[0005] The present disclosure provides a battery pack and a battery cabinet. The plurality of temperature sensors of the integrated busbar of the battery pack can be in contact with the plurality of cells of the battery module, and can directly collect the temperature of the cells. Moreover, a flue for the smoke sprayed out by the explosion-proof valve of the cells to flow is formed between the integrated busbar and the battery module. The technical solutions of the battery pack and the battery cabinet are described as follows.

[0006] In a first aspect, the present disclosure provides a battery pack. The battery pack comprises a housing, a battery module and an integrated busbar. The battery module and the integrated busbar are located in the interior of the housing. The battery module comprises at least one column of battery cells, each column of battery cells comprising a plurality of battery cells. The integrated busbar comprises an insulating support, a connecting busbar and a sampling board. The insulating support is arranged on the battery module in the opening direction of the explosion-proof valve of the battery cell, and the sampling board and the connecting busbar are arranged on the insulating support. The connecting busbar is used to electrically connect the at least one column of battery cells. The insulating support comprises a flue comprising a groove bottom and two first side walls, the flue is buckled on the column of battery cells, the groove bottom of the flue faces the explosion-proof valve of the column of battery cells, and the two first side walls of the flue are located on both sides of the explosion-proof valve of the column of battery cells. The groove bottom of the flue is provided with openings of a plurality of channels. The side walls of the plurality of channels extend in the opening direction of the explosion-proof valve, one end of the side walls of the plurality of channels communicates with the openings, and the other end of the side walls of the plurality of channels is connected to the battery cells. The temperature sensor electrically connected to the sampling board contacts the battery cells through the channels. The position of the channel is staggered with the explosion-proof valve, and the side walls of the plurality of channels separate the temperature sensor and the explosion-proof valve.

[0007] The battery pack provided by the present disclosure is applied to application scenarios such as data centers, site energy, industrial and commercial energy storage or power station energy storage. The insulating support can be made of high-temperature-resistant plastic material, and the high-temperature resistance of the insulating support is better than that of the hot-pressing film, so that in the early stage of thermal runaway of the battery module, the sampling board will not be melted and damaged under the heat insulation effect of the insulating support. Two connecting busbars are electrically connected to two columns of pole columns of the battery module to realize series connection or parallel connection of a plurality of battery cells. The circuit board of the sampling board is a flexible printed circuit (FPC) or a printed circuit board (PCB). The opening direction of the explosion-proof valve of the battery cell is from low to high.

[0008] The technical scheme provided by the present disclosure is characterized in that: the smoke emitted by the explosion-proof valve of the battery cell flows into the flue, and under the blocking effect of the two side walls of the flue, the smoke cannot flow to the two sides of the flue, thereby reducing the risk of short circuit of the battery module and further reducing the possibility of further deterioration of thermal runaway of the battery pack. In addition, one end of the side wall of the plurality of channels is connected to the opening of the groove bottom of the flue, and the other end of the side wall is connected to the battery cell. On the one hand, the temperature sensor can pass through the channel and directly contact the battery cell. In this way, the temperature collected by the temperature sensor is the temperature of the battery cell, so that the temperature obtained by the battery management unit (BMU) is the temperature of the battery cell, which is beneficial to the temperature control protection of the battery cell by the battery management unit and improves the safety of the battery pack. On the other hand, the inside of the channel is separated from the inside of the flue, so that the smoke emitted by the explosion-proof valve of the battery cell cannot enter the channel, and the smoke emitted by the explosion-proof valve of the battery cell cannot be directly emitted to the side of the integrated busbar away from the battery module. In this way, the smoke cannot corrode the sampling plate and the connecting bus, thereby reducing the failure risk of the sampling plate and the short circuit risk of the battery module, and further reducing the possibility of further deterioration of thermal runaway of the battery pack.

[0009] In an implementation manner, the side wall of the plurality of channels, the side wall of the flue and the top wall of the battery cell form a containing cavity, and the temperature sensor is located in the containing cavity. The side wall of the plurality of channels forms an incomplete ring, and the gap of the ring is closed by the side wall of the flue, so that the inside of the channel is separated from the inside of the flue.

[0010] In an implementation manner, the side wall of the plurality of channels and the top wall of the battery cell form a containing cavity, and the temperature sensor is located in the containing cavity. The side wall of the plurality of channels forms a complete ring, and the side wall of the plurality of channels separates the inside of the channel from the inside of the flue.

[0011] In an implementation manner, the temperature sensor is located between the connecting bus and the explosion-proof valve of the battery cell, and the height of the side wall of the channel is higher than the explosion-proof valve of the battery cell and the temperature sensor.

[0012] In an implementation, the insulation support includes a main plate. The main plate includes two busbar fixing portions and a sampling plate fixing portion between the two busbar fixing portions. The two busbar fixing portions are respectively used for fixing the busbars. The sampling plate fixing portion is used for fixing the sampling plate, and the flue and the channel are arranged in the sampling plate fixing portion. The insulation support includes a first side plate connected to one end of the sampling plate fixing portion, the first side plate extends along the height direction of the battery module, and a gap is formed between the first side plate and the side wall of the battery module, and the gap is communicated with the flue. In this way, the flue gas in the flue can flow out through the gap and flow into the inside of the shell. Wherein, the first side plate is arranged in a spaced manner with the bottom wall of the shell, so that the flue gas in the gap can flow out smoothly.

[0013] In an implementation, the battery pack further includes a battery pack explosion-proof valve arranged in the shell wall opposite to the first side plate.

[0014] In this way, when the amount of flue gas discharged by the flue is too large to cause the pressure in the shell to be too large, the battery pack explosion-proof valve is opened to reduce the possibility of explosion of the battery pack. And since the shell wall where the battery pack explosion-proof valve is arranged is opposite to the first side plate, when the battery pack explosion-proof valve is opened, the flue gas flowing out from the gap can be discharged from the battery pack explosion-proof valve more quickly, improving the exhaust efficiency of the flue gas.

[0015] In an implementation, the height of the battery pack explosion-proof valve is lower than the height of the bottom end of the first side plate. In this way, it is beneficial for the first side plate to guide the flue gas to the battery pack explosion-proof valve.

[0016] In an implementation, the groove bottom of the flue includes a plurality of first grooves, and the plurality of first grooves are respectively arranged opposite to a plurality of cell explosion-proof valves of the battery module. Wherein, the groove bottom thickness of the first groove is smaller than the thickness of the groove bottom of the flue. The first groove is used to thin the insulation support to weaken the strength of the part where the first groove is located. In this way, in the late stage of thermal runaway, when the flue gas sprayed by the cell explosion-proof valve is too much and the temperature is too high, the flue gas sprayed by the cell explosion-proof valve can break through the part of the sampling plate fixing portion where the first groove is located. It is beneficial for the flue gas sprayed by the cell explosion-proof valve to quickly spread in the inside of the shell, reducing the possibility of explosion of the battery pack.

[0017] In an implementation, each busbar includes two second grooves. The groove bottoms of the two second grooves each have a positioning through hole, and the two positioning through holes are respectively opposite to two pole columns connected with the busbar. Wherein, the positioning through hole is used to position the relative position relationship between the busbar and the pole column during the welding process of the busbar and the pole column. Each busbar is used for electrically connecting with the pole columns of two cells to connect the two cells in series or parallel.

[0018] The technical scheme provided by the present disclosure has the following beneficial effects. On the one hand, the two second grooves are arranged at positions corresponding to the two pole columns of the connecting row, so that the thickness of the part of the connecting row used for welding with the pole columns is reduced, thereby improving the reliability of the welding of the connecting row with the two pole columns. On the other hand, the thickness of the part of the connecting row between the two second grooves is not reduced, so that the connecting row can still bear a large current.

[0019] In an implementation manner, the side of the connecting row fixing portion facing away from the battery module comprises a plurality of accommodating grooves. The groove bottom of the accommodating groove has two openings, and the two pole columns of the battery module pass through the two openings respectively. Each connecting row is located in an accommodating groove.

[0020] The technical scheme provided by the present disclosure has the following beneficial effects. On the one hand, the two second grooves are arranged at positions corresponding to the two pole columns of the connecting row, so that the thickness of the part of the connecting row used for welding with the pole columns is reduced, thereby improving the reliability of the welding of the connecting row with the two pole columns. On the other hand, the thickness of the part of the connecting row between the two second grooves is not reduced, so that the connecting row can still bear a large current.

[0021] In an implementation manner, the side of the connecting row fixing portion facing away from the battery module comprises a plurality of accommodating grooves. The groove bottom of the accommodating groove has two openings, and the two pole columns of the battery module pass through the two openings respectively. Each connecting row is located in an accommodating groove.

[0022] In an implementation manner, the height of the side wall of the accommodating groove is higher than the height of the connecting row.

[0023] The technical scheme provided by the present disclosure has the following beneficial effects. On the one hand, the two second grooves are arranged at positions corresponding to the two pole columns of the connecting row, so that the thickness of the part of the connecting row used for welding with the pole columns is reduced, thereby improving the reliability of the welding of the connecting row with the two pole columns. On the other hand, the thickness of the part of the connecting row between the two second grooves is not reduced, so that the connecting row can still bear a large current.

[0024] In an implementation manner, the side of the connecting row fixing portion facing away from the battery module comprises a plurality of accommodating grooves. The groove bottom of the accommodating groove has two openings, and the two pole columns of the battery module pass through the two openings respectively. Each connecting row is located in an accommodating groove.

[0025] In an implementation manner, the insulating support further comprises a third side plate. The third side plate is connected to one side of the main body plate and located between the first side plate and the second side plate. The first side plate is provided with a first limiting groove, and the third side plate is provided with a second limiting groove. The first pole output row comprises a first segment, a second segment and a third segment connected in sequence, the first segment extends into the first limiting groove, the second segment extends into the second limiting groove, and the third segment is fixed to the second side plate. The first limiting groove and the second limiting groove are provided, on the one hand, so that the first side plate and the third side plate can separate the first pole output row from the side wall of the battery module, thereby avoiding the first pole output row and the second pole output row from igniting due to arc between the battery module. On the other hand, the first side plate and the third side plate also separate the first pole output row from the shell, thereby reducing the risk of electric shock.

[0026] In an implementation manner, the integrated busbar further comprises at least one insulating sleeve. The insulating sleeve surrounds the first pole output row and / or the second pole output row. The material of the insulating sleeve comprises a ceramic composite material.

[0027] The technical solution provided by the present disclosure is that the insulating sleeve surrounds the first pole output row and / or the second pole output row, so that the insulating sleeve separates the first pole output row and the second pole output row from the battery module, thereby avoiding the first pole output row and the second pole output row from igniting due to arc between the battery module. At the same time, the insulating sleeve also separates the first pole output row and the second pole output row from the shell, thereby avoiding the risk of electric shock.

[0028] In an implementation manner, the integrated busbar further comprises a fuse, and the fuse is connected in series with the first pole output row or the second pole output row. The fuse is fixed to the side of the second side plate away from the battery module. In this way, when the battery module is short-circuited and the current of the first pole output row and the second pole output row is too large, the fuse will be blown, thereby achieving short-circuit protection.

[0029] In an implementation manner, the circuit board comprises a first plate body and a second plate body. The first plate body is fixed to the sampling plate fixing portion, and the second plate body is bent relative to the first plate body, and a part of the second plate body is fixed to the second side plate. The sampling plate further comprises a data output connector, and the data output connector is fixed to the end of the second plate body away from the first plate body. The data output connector is used to be connected with the battery management unit, so that the information collected by the sampling plate can be output to the battery management unit, and the battery management unit can manage the battery cells in the battery pack based on the received information.

[0030] In an implementation manner, the sampling plate further comprises an OT terminal connector, and the OT terminal connector is fixed to the second plate body and electrically connected with the data output connector. The integrated busbar further comprises at least one OT terminal. The OT terminal is arranged on the first pole output row and / or the second pole output row, and the OT terminal is electrically connected with the OT terminal connector.

[0031] The OT terminal includes an OT temperature acquisition terminal and an OT pressure acquisition terminal. The OT temperature acquisition terminal is configured to acquire the temperature of the first pole output row and / or the second pole output row, and the OT pressure acquisition terminal is configured to acquire the voltage of the first pole output row and / or the second pole output row. The information acquired by the OT terminal can be transmitted to the data output connector via the OT terminal connector, and then transmitted to the battery management unit via the data transmission connector.

[0032] In an implementation, the shell includes a bottom shell, a top cover, and an end cover assembly. The bottom shell or the top cover is provided with a port opposite the second side plate, and the end cover assembly seals the port. The end cover assembly includes a receiving cavity, and the battery pack further includes a battery management unit located in the receiving cavity and electrically connected. Since the battery management unit is arranged in the receiving cavity of the end cover assembly, the battery management unit and the battery module are separated by the end cover assembly, reducing the possibility of sparks generated by the battery management unit being transmitted to the battery module.

[0033] In an implementation, the end cover assembly includes a first end plate, a cover plate, and a partition plate. The first end plate is located at the port and is provided with a connector through hole for the data output connector to pass through. The cover plate is fixedly connected with the first end plate, and the cover plate and the first end plate enclose a receiving cavity. The partition plate is located in the receiving cavity and seals a part of the connector through hole. A gap is formed between the partition plate and the hole wall of the connector through hole. The second plate body passes through the gap. The battery management unit is fixed to the side of the partition plate away from the first end plate.

[0034] The technical solution provided by the present disclosure allows the data output connector to extend to the other side of the first end plate through the connector through hole, ensuring the normal docking of the data output connector and the battery management unit. By sealing a part of the connector through hole with the partition plate and only leaving a gap for the second plate body to pass through, and arranging the battery management unit on the side of the partition plate away from the first end plate, the battery management unit and the battery module are almost completely separated by the first end plate and the partition plate, reducing the possibility of sparks generated by the battery management unit being transmitted to the battery module.

[0035] In an implementation, the integrated busbar further includes a first insulating sheet attached to the side of the second side plate facing the battery module.

[0036] The first insulating sheet includes a ceramic composite material, which can be referred to as a first ceramic composite strip. The first insulating sheet can separate the battery module from other electrical components (such as fuses and connectors) to prevent sparks generated by other electrical components from being transmitted to the battery module.

[0037] In a second aspect, the present disclosure provides a battery cabinet. The battery cabinet comprises a cabinet body and a plurality of battery packs according to any one of the first aspect. The plurality of battery packs are electrically connected and located in the interior of the cabinet body. Wherein, the plurality of battery packs are connected in series or in parallel. The battery pack comprises a battery pack explosion-proof valve, and the battery pack explosion-proof valves of the plurality of battery packs are all in communication with a cabinet body flue of the cabinet body. In this way, the flue gas discharged by the battery pack explosion-proof valve is discharged through the cabinet body flue, avoiding the flue gas sprayed after the battery pack explosion-proof valve explodes from polluting the environment. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic diagram of a battery pack provided by an embodiment of the present disclosure;

[0039] Figure 2 is a schematic diagram of a battery pack provided by an embodiment of the present disclosure;

[0040] Figure 3 is an exploded view of a battery pack provided by an embodiment of the present disclosure;

[0041] Figure 4 is a schematic diagram of a battery module and an integrated busbar provided by an embodiment of the present disclosure;

[0042] Figure 5 is an exploded view of an integrated busbar provided by an embodiment of the present disclosure;

[0043] Figure 6 is Figure 5 is a partial enlarged view of the portion outlined by block A in FIG. 9;

[0044] Figure 7 is a schematic diagram of a conductive row provided by an embodiment of the present disclosure;

[0045] Figure 8 is a schematic diagram of an integrated busbar provided by an embodiment of the present disclosure;

[0046] Figure 9 is Figure 8 is a partial enlarged view of the portion outlined by block D in FIG. 10;

[0047] Figure 10 is a schematic diagram of a sampling plate provided by an embodiment of the present disclosure;

[0048] Figure 11 is Figure 10 is a partial enlarged view of the portion outlined by block E in FIG. 11;

[0049] Figure 12 is a schematic diagram of the bottom of an integrated busbar provided by an embodiment of the present disclosure;

[0050] Figure 13 is Figure 12 is a partial enlarged view of the portion outlined by block G in FIG. 12;

[0051] Figure 14 is a sectional view of an integrated busbar and battery module provided by an embodiment of the present disclosure;

[0052] Figure 15 is Figure 14 is a partial enlarged view of the portion framed by the middle frame H in

[0053] Figure 16 is a partial sectional view of an integrated busbar provided by an embodiment of the present disclosure;

[0054] Figure 17 is a schematic view of a connection busbar, a first-pole output busbar, a second-pole output busbar and a fuse provided by an embodiment of the present disclosure;

[0055] Figure 18 is a schematic view of a current path of a battery module provided by an embodiment of the present disclosure;

[0056] Figure 19 is a schematic view of a second-pole output busbar and an insulating sleeve provided by an embodiment of the present disclosure;

[0057] Figure 20 is a schematic view of a first-pole output busbar and an insulating sleeve provided by an embodiment of the present disclosure;

[0058] Figure 21 is Figure 5 is a partial enlarged view of the portion framed by the box B in

[0059] Figure 22 is Figure 5 is a partial enlarged view of the portion framed by the box C in

[0060] Figure 23 is Figure 17 is a partial enlarged view of the portion framed by the box I in

[0061] Figure 24 is Figure 10 is a partial enlarged view of the portion framed by the box F in

[0062] Figure 25 is a schematic view of an end cover assembly, a battery management unit, a positive-pole output terminal and a negative-pole output terminal provided by an embodiment of the present disclosure;

[0063] Figure 26 is a schematic view of a first end plate and a partition plate provided by an embodiment of the present disclosure;

[0064] Figure 27 is a front view of an end cover assembly provided by an embodiment of the present disclosure;

[0065] Figure 28is a schematic view of a sampling plate and end cover assembly provided by embodiments of the present disclosure;

[0066] Figure 29 is an exploded view of a battery module provided by embodiments of the present disclosure;

[0067] Figure 30 is an exploded view of a cladding assembly provided by embodiments of the present disclosure;

[0068] Figure 31 is a schematic view of a battery cabinet provided by embodiments of the present disclosure;

[0069] Figure 32 is a schematic view of a battery pack and connector provided by embodiments of the present disclosure;

[0070] Figure 33 is Figure 31 is a partial enlarged view of the portion outlined by box J in

[0071] Legend

[0072] 001, battery pack, 002, cabinet body, 0021, cabinet body flue, 003, connector;

[0073] 01, housing, 011, bottom shell, 0111, port, 012, top cover, 013, end cover assembly, 0131, first end plate, 01310, gap, 01311, perforation, 0132, cover plate, 0133, partition plate;

[0074] 02, battery module, 021, battery cell, 0211, pole, 0212, battery cell explosion-proof valve, 0213, slotted, 022, cladding assembly, 0220, insulating sheet, 0221, bottom plate, 0222, side plate, 0223, second end plate, 0224, hoop band, 0225, flexible partition plate;

[0075] 03, integrated busbar;

[0076] 04, battery pack explosion-proof valve;

[0077] 05, battery management unit, 051, battery management unit connector;

[0078] 06, heat-conducting pad;

[0079] 07, second insulating sheet;

[0080] 08, positive output terminal;

[0081] 09, negative output terminal;

[0082] 1. Insulating support, 10. Main plate, 11. Connection row fixing part, 111. Containing groove, 112. Opening, 113. Buckle, 114. Side wall, 115. Positioning strip, 116. Fourth groove, 12. Sampling plate fixing part, 121. Flue, 122. Passage, 123. First groove, 124. Positioning pin, 13. First side plate, 130. Gap, 131. First limiting groove, 14. Second side plate, 15. Third side plate, 151. Second limiting groove, 16. Fuse cover plate;

[0083] 2. Connection row, 21. Second groove, 22. Positioning through hole, 23. Bayonet, 24. Positioning port;

[0084] 3. Sampling plate, 31. Circuit board, 311. First plate body, 3111. Opening, 3112. Connection strip, 3113. Pin shaft hole, 312. Second plate body, 32. Temperature sensor, 33. Nickel sheet, 34. Data output connector, 35. OT terminal connector;

[0085] 4. First pole output row, 41. Positive aluminum sheet, 411. First section, 4111. First pole inner connection end, 412. Second section, 413. Third section, 42. Positive copper sheet;

[0086] 5. Second pole output row, 51. Negative aluminum sheet, 511. Second pole inner connection end, 52. First negative copper sheet, 53. Second negative copper sheet;

[0087] 6. Fuse;

[0088] 7. Insulating sleeve;

[0089] 8. OT terminal, 81. OT temperature sampling terminal, 82. OT pressure sampling terminal;

[0090] 9. First insulating sheet. DETAILED DESCRIPTION

[0091] Generally speaking, in order to increase the capacity of the battery pack, a plurality of battery cells connected in series or in parallel are included in the battery pack. And in order to detect the working state, state of charge, thermal runaway risk and thermal management demand of the battery cell in real time, the temperature of the battery cell needs to be detected in real time. By monitoring the temperature of the battery in real time, potential risks such as overheating or overcooling of the battery can be effectively prevented, thereby improving the service life and safety of the battery, and therefore the temperature sampling accuracy is crucial for the efficient and safe use of the battery.

[0092] In the related art, a battery pack includes a shell, a battery module and an integrated busbar, which can also be referred to as a cells contact system (CCS). The integrated busbar includes a connection bar and a sampling plate, which are pressed together by a hot stamping film. The connection bar is welded with the pole of a cell in the battery module to realize the series or parallel connection of the cells in the battery module. A temperature sensor (such as a thermistor) is arranged on the connection bar, and the sampling plate is electrically connected with the temperature sensor on the connection bar. The sampling plate can collect the temperature of the connection bar through the temperature sensor and send the temperature of the connection bar as the temperature of the cell to a battery management unit (BMU).

[0093] However, the temperature of the connection bar is not equal to the temperature of the cell, and after the temperature of the cell rises, the heat needs a certain time to conduct to the connection bar, which makes the temperature obtained by the battery management unit inaccurate and not timely. This is not conducive to the temperature control protection of the battery management unit on the cell, and reduces the safety of the battery pack.

[0094] In addition, an anti-explosion valve is arranged on the cell, and when the cell has a thermal runaway phenomenon, the anti-explosion valve will spray out high-temperature and corrosive smoke. The smoke will corrode the connection bar and the sampling plate, which may further worsen the thermal runaway phenomenon of the cell and reduce the safety of the battery pack.

[0095] In view of the above technical problems, the present embodiment provides a new battery pack 001. The battery pack 001 provided by the present embodiment can be applied to application scenarios such as data centers, site energy, industrial and commercial energy storage and power station energy storage. For example, the battery pack 001 is applied to an uninterruptible power supply (UPS) in a data center.

[0096] Figure 1 And Figure 2 An external view of the battery pack 001 is shown. Figure 3 An exploded view of the battery pack 001 is shown. As Figures 1-3 shown, the battery pack 001 includes a shell 01, a battery module 02 and an integrated busbar 03. The battery module 02 and the integrated busbar 03 are located inside the shell 01.

[0097] Figure 4 A schematic view of the battery module 02 and the integrated busbar 03 is shown. As Figure 4As shown, the battery module 02 includes at least one column of battery cells 021, and each column of battery cells 021 includes a plurality of battery cells 021. Each battery cell 021 includes two polar posts 0211 (positive and negative polar posts), and the polar posts 0211 of each column of battery cells 021 are arranged in two columns. An explosion-proof valve 0212 is arranged between the two polar posts 0211 of each battery cell 021. The explosion-proof valve 0212 is used to release pressure when the battery cell 021 is in thermal runaway, so as to prevent the battery cell 021 from exploding. In order to enable smoke in the battery cell 021 to rush out through the explosion-proof valve 0212 when the pressure in the battery cell 021 is too high, the explosion-proof valve 0212 has relatively low structural strength.

[0098] Figure 5 An exploded view of the integrated busbar 03 is shown, as Figure 5 and Figure 4 As shown, the integrated busbar 03 includes an insulating support 1, two groups of connection busbars 2, and a sampling plate 3. The insulating support 1 can be made of a high-temperature-resistant plastic material. Compared with the heat-pressed film in the related art, the insulating support 1 has better high-temperature resistance, so that, in the early stage of thermal runaway of the battery module 02, the sampling plate 3 on the insulating support 1 will not be melted and damaged under the heat insulation of the insulating support 1. The insulating support 1 includes a main plate 10, and the main plate 10 includes two connection busbar fixing portions 11 and a sampling plate fixing portion 12 located between the two connection busbar fixing portions 11. The two groups of connection busbars 2 are fixed to the two connection busbar fixing portions 11, respectively, and are connected (such as welded) to the two columns of polar posts 0211 of the battery module 02, so as to connect the plurality of battery cells 021 of the battery module 02 in series or in parallel.

[0099] Figure 6 A partial enlarged view of the portion framed by the frame A in Figure 5 is shown. As shown in Figure 5 and Figure 6 The side of the connection busbar fixing portion 11 away from the battery module 02 includes a plurality of accommodating grooves 111, and the groove bottom of each accommodating groove 111 is provided with two openings 112 for the two polar posts 0211 connected by the connection busbar 2 to pass through. Each connection busbar 2 is limited in one accommodating groove 111.

[0100] The technical solution provided by the embodiments of the present disclosure is that the accommodating grooves 111 are arranged on the side of the connection busbar fixing portion 11 away from the battery module 02. On the one hand, this facilitates the fixation of the connection busbar 2. On the other hand, the groove opening of the accommodating groove 111 faces the top cover 012 of the shell 01, and most of the area of the connection busbar 2 faces the top cover 012, which is beneficial to the conduction of heat of the connection busbar 2 to the top cover 012 and the dissipation of the heat through the top cover 012. It should be noted that, in the related art, in order to prevent conductive foreign matter, the side of the connection busbar 2 facing the top cover 012 is coated, which is not conducive to the heat dissipation of the connection busbar 2.

[0101] In some examples, asFigure 3 As shown, the battery pack 001 also includes multiple thermal pads 06. The thermal pads 06 are attached to the connector 2 and are used to conduct heat from the connector 2 to the top cover 012 of the housing 01.

[0102] In some examples, such as Figure 6 As shown, the two opposite side walls of the receiving groove 111 are provided with buckles 113. Figure 7 A schematic diagram of connecting row 2 is shown, as follows: Figure 7 As shown, the two opposite side walls of the connecting row 2 are provided with bayonets 23. Figure 8 A schematic diagram of integrated busbar 03 is shown. Figure 9 It shows Figure 8 A magnified view of the portion enclosed by box D in the image. (See image below.) Figure 9 As shown, the two clips 113 are located in the two bayonet slots 23 respectively. The snap-fit ​​connection method facilitates the installation of the connecting strip 2.

[0103] In some examples, such as Figure 6 As shown, the dimension of the buckle 113 along the length of the connecting strip fixing part 11 is L1. (As shown...) Figure 7 As shown, the dimension of the bayonet 23 along the length of the connecting strip fixing part 11 is L2, where L1 is less than L2. Thus, as... Figure 9 As shown, there are gaps between the two side walls of the buckle 113 and the bayonet 23, and the connecting strip 2 can be offset in the length direction of the connecting strip fixing part 11. This makes it possible to adjust the position of the connecting strip 2 and the pole post 0211 to achieve a higher degree of alignment between the connecting strip 2 and the pole post 0211 during the welding process.

[0104] In some examples, such as Figure 6 As shown, the distance between the head of the latch 113 and the bottom of the receiving groove 111 is d1. Figure 7 As shown, the thickness of connecting strip 2 at bayonet 23 is d2, where d2 is less than d1. Figure 9 As shown, there is a gap between the head of the latch 113 and the bottom of the latch 23. This allows the connecting strip 2 to shift in the thickness direction of the connecting strip fixing part 11. This facilitates adjusting the orientation of the connecting strip 2 during the welding process to the pole post 0211, thus improving the reliability of the welding.

[0105] In some examples, such as Figure 6 As shown, a positioning strip 115 is also provided in the receiving groove 111. (As indicated...) Figure 7 As shown, the side wall of the connecting row 2 is also provided with a positioning port 24, and the positioning strip 115 extends into the positioning port 24.

[0106] In some examples, such as Figure 9As shown, the height of the side wall 114 of the accommodating groove 111 is higher than the height of the connection row 2. In this way, when a conductive foreign matter (such as a screw) falls on the integrated busbar 03 and contacts the side wall 114, one end of the conductive foreign matter sinks and contacts the connection row 2 on one side of the side wall 114, and the other end of the conductive foreign matter is raised and cannot contact the connection row 2 on the other side of the side wall 114, so that the connection rows 2 on both sides of the side wall 114 are not short-circuited, and the safety of the battery pack 001 during use and during manufacturing is improved.

[0107] The connection row 2 is used to realize the series or parallel connection of the battery cell 021. The greater the current carried by the connection row 2, the greater the thickness of the connection row 2 needs to be. However, the greater the thickness of the connection row 2, the more difficult it is to weld the connection row 2 with the pole 0211 of the battery cell 021, and there may be a case that the laser welding is not penetrated.

[0108] In order to balance the large current and improve the reliability of welding the connection row 2 with the pole 0211, in some examples, as shown in Figure 7 As shown, the side of the connection row 2 away from the battery module 02 is provided with two second grooves 21, and the groove bottoms of the two second grooves 21 are provided with positioning through holes 22. The two positioning through holes 22 are used to be opposite to the positions of the two poles 0211 connected by the connection row 2, so as to facilitate positioning the connection row 2 when welding the connection row 2 with the poles 0211. The connection row 2 can be made of aluminum and can be referred to as an aluminum bar. When assembling the battery pack, a camera will take a photo of the positioning through hole 22 and the pole 0211, and analyze whether the square positioning through hole 22 is coaxial with the circular groove (such as Figure 4 As shown) on the pole 0211, so as to position the relative positions of the connection row 2 and the pole 0211.

[0109] The technical scheme provided by the embodiments of the present disclosure enables two second grooves 21 at the positions of the two poles 0211 corresponding to the connection row 2, so that the thickness of the part of the connection row 2 welded with the poles 0211 is thinner, which is conducive to improving the reliability of welding the connection row 2 with the two poles 0211. On the other hand, the thickness of the part between the two second grooves 21 on the connection row 2 is not thinned, so the connection row 2 can still carry a large current. In this way, Figure 6 The arrow in the figure shows the direction of the current flow.

[0110] As shown in Figure 6 The sampling plate fixing part 12 includes a plurality of channels 122, and the plurality of channels 122 penetrate the sampling plate fixing part 12 in the thickness direction. Moreover, the positions of the channels 122 are staggered with the positions of the battery cell explosion-proof valves 0212 of the battery module 02.

[0111] Figure 10 The figure shows a schematic view of the sampling plate 3. Figure 11 The figure shows Figure 10A partial enlarged view of the part framed by the middle frame E. As shown in Figure 10 and Figure 11 The sampling plate 3 includes a circuit board 31 and a plurality of temperature sensors 32. As shown in Figure 8 and Figure 9 The circuit board 31 is fixed to the sampling plate fixing portion 12 on the side facing away from the battery module 02. The plurality of temperature sensors 32 are respectively located in the plurality of channels 122 and are in contact with the plurality of battery cells 021 in the battery module 02. The circuit board 31 of the sampling plate 3 is a flexible printed circuit (FPC) or a printed circuit board (PCB). The temperature sensor can be a thermistor.

[0112] The technical solution provided by the embodiments of the present disclosure is that the sampling plate fixing portion 12 of the insulating support 1 includes a plurality of channels 122, so that the plurality of temperature sensors 32 can respectively pass through the plurality of channels 122 and be in contact with the plurality of battery cells 021 of the battery module 02. In this way, the temperature collected by the temperature sensor 32 is the temperature of the battery cell 021, and the temperature sampling accuracy of the sampling plate 3 is high. This makes the temperature obtained by the battery management unit 05 more accurate and timely, which is beneficial to the temperature control protection of the battery cell 021 by the battery management unit, and improves the safety of the battery pack 001.

[0113] In addition, the structural strength at the battery cell explosion-proof valve 0212 of the battery cell 021 is low. Therefore, by setting the position of the channel 122 to be staggered with the battery cell explosion-proof valve 0212 of the battery cell 021, the temperature sensor 32 will not be in contact with the battery cell explosion-proof valve 0212, thereby avoiding damage to the battery cell explosion-proof valve 0212 during the connection of the temperature sensor 32 and the battery cell 021.

[0114] In some examples, as shown in Figure 4 The part opposite to the channel 122 of the battery cell 021 is provided with a slot 0213 for exposing the metal material of the battery cell 021. The temperature sensor 32 is in contact with the bottom of the slot 0213. In this way, the temperature sensor 32 is in direct contact with the metal material of the battery cell 021, further improving the temperature sampling accuracy and timeliness of the temperature sensor 32. It can be understood that, since the structural strength at the battery cell explosion-proof valve 0212 is low, the slot 0213 cannot be opened at the battery cell explosion-proof valve 0212. Or, it is difficult to open the slot 0213 under the premise of ensuring that the battery cell explosion-proof valve 0212 is not damaged.

[0115] In some examples, the groove bottom of the groove 0213 is marked with an information code (such as a two-dimensional code), and the information code is used to identify the battery cell 021. In the related art, in order to mark the information code on the battery cell 021, it is generally necessary to provide the groove 0213 on the battery cell 021, and mark the information code on the metal material at the bottom of the groove 0213 of the battery cell 021. That is, the technical solution provided by the embodiment of the present disclosure reuses the groove 0213 where the information code is located, so that no new groove 0213 needs to be added on the battery cell 021, thereby reducing the processing difficulty of the battery cell 021 and reducing the cost.

[0116] The embodiment of the present disclosure does not limit the implementation manner of the electrical connection between the circuit board 31 and the temperature sensor 32. In some examples, as shown in Figure 10 and Figure 11 , the circuit board 31 includes a plurality of openings 3111. As shown in Figure 9 , in the direction perpendicular to the sampling board fixing portion 12, the plurality of openings 3111 are adjacent to or connected to the plurality of channels 122 respectively, and one side wall of each opening 3111 extends one connection strip 3112. Each connection strip 3112 extends into a corresponding channel 122 and is connected to a temperature sensor 32. Wherein, the connection strip 3112 is integrally formed with the circuit board 31. In other examples, the circuit board 31 and the temperature sensor 32 are electrically connected through an electrical connection line.

[0117] The embodiment of the present disclosure does not limit the arrangement manner of the above-mentioned channel 122, opening 3111, temperature sensor 32 and groove 0213, as long as the arrangement manner of the channel 122, opening 3111, temperature sensor 32 and groove 0213 is the same.

[0118] In some examples, as shown in Figure 5 and Figure 6 , the plurality of channels 122 of the sampling board fixing portion 12 are arranged along the length direction of the sampling board fixing portion 12, and adjacent two channels 122 are close to different connection row fixing portions 11 respectively.

[0119] Wherein, in order to facilitate batch processing of the groove 0213, the positions of the grooves 0213 of the plurality of battery cells 021 are the same, for example, the grooves 0213 of the plurality of battery cells 021 are close to the negative electrode poles. Assuming that the plurality of battery cells 021 are in a series connection relationship, the polarities of the poles 0211 of adjacent two battery cells 021 are opposite, which makes the grooves 0213 of the adjacent two battery cells 021 close to the poles 0211 of different columns, and further makes the adjacent two channels 122 close to different connection row fixing portions 11. Of course, assuming that the plurality of battery cells 021 are not in a series connection relationship, the arrangement manner of the channel 122 will be adaptively changed following the arrangement manner of the groove 0213.

[0120] In some examples, as shown in Figures 9-11As shown, the sampling plate 3 further comprises a plurality of nickel sheets 33, one end of the nickel sheets 33 is electrically connected with the circuit board 31, and the other end is electrically connected with the connecting bar 2 in the connecting bar 2. The sampling plate 3 is used to collect the voltage of the battery cell 021 through the nickel sheet 33.

[0121] As previously described, after the battery cell explosion-proof valve 0212 of the battery cell 021 is opened, the smoke (possibly mixed with liquid) sprayed by the battery cell explosion-proof valve 0212 is high in temperature and strong in corrosion. If the smoke is allowed to spread randomly, the smoke may corrode the pole 0211, the connecting bar 2 and the sampling plate 3, causing the battery module 02 to short circuit and the sampling plate 3 to fail, which may further exacerbate the thermal runaway of the battery pack 001. Moreover, since the passage 122 penetrating in the thickness direction is arranged in the sampling plate fixing portion 12, it is also necessary to avoid the smoke flowing into the side of the integrated busbar 03 away from the battery module 02 through the passage 122.

[0122] Figure 12 A schematic view of the side of the integrated busbar 03 facing the battery module 02 is shown, Figure 13 A partial enlarged view of the part framed by the frame G in Figure 12 In order to make the smoke sprayed by the battery cell explosion-proof valve 0212 controllable, in some examples, as shown in Figure 12 and Figure 13 As shown, the side of the sampling plate fixing portion 12 facing the battery module 02 comprises a flue 121, and the flue 121 comprises a groove bottom and two side walls. Among them, the flue 121 is Figure 12 and Figure 13 The part framed by the dashed line frame in Figure 14 A cross-sectional view of the battery pack is shown. Figure 15 A partial enlarged view of the part framed by the frame H in Figure 14 Figure 16 A schematic view of the inside of the flue 121 after the sampling plate fixing portion 12 is partially opened on the side away from the battery module 02. As can be seen from Figures 14-16 The flue 121 is buckled on a row of battery cells 021, and the groove bottom of the flue 121 faces the battery cell explosion-proof valve 0212 of the row of battery cells 021. The two side walls of the flue 121 are located on both sides of the battery cell explosion-proof valve 0212 of the row of battery cells 021. In addition, the side wall of the flue 121 is located between the two connecting bar fixing portions 11, so that the side wall of the flue 121 separates the flue 121 from the two connecting bar fixing portions 11, and further separates the flue 121 from the connecting bar 2 and the pole 0211.

[0123] As Figure 13 and Figure 16 ​As shown, the groove bottom of the flue 121 is provided with openings of a plurality of passages 122. The sidewalls of the plurality of passages 122 extend along the opening direction of the battery cell explosion-proof valve 0212, one end of the sidewalls of the plurality of passages 122 is connected with the openings, and the other end abuts against the battery cell 021. The temperature sensor 32 passes through the passage 122 to contact the battery cell 021, and the position of the passage 122 is staggered with the battery cell explosion-proof valve 0212. The sidewalls of the plurality of passages 122 separate the temperature sensor 32 and the battery cell explosion-proof valve 0212.

[0124] The technical scheme provided by the embodiments of the present disclosure is that the smoke sprayed by the battery cell explosion-proof valve 0212 flows along the flue 121, and under the blocking action of the two sidewalls of the flue 121, the smoke flowing into the flue 121 will not spread to the two sides of the flue 121, and thus will not corrode the pole 0211 and the connection row 2 on the two sides of the flue 121, reducing the risk of short circuit and the possibility of further deterioration of the thermal runaway of the battery pack 001. In addition, since one end of the sidewall of the passage 122 is connected with the opening and the other end abuts against the battery cell 021, the inside of the passage 122 is separated from the flue 121, so that the smoke in the flue 121 will not be directly sprayed to the side of the integrated busbar 03 away from the battery module 02 through the passage 122, and thus the smoke will not corrode the sampling plate 3 and the connection row 2, reducing the failure risk of the sampling plate 3 and the possibility of further deterioration of the thermal runaway of the battery pack 001.

[0125] In some examples, as shown in Figure 13 and Figure 16 As shown, the sidewall of the passage 122, the sidewall of the flue 121 and the top wall of the battery cell 021 enclose a containing cavity, and the temperature sensor 32 is located in the containing cavity. For example, the passage 122 includes three sidewalls, and the three sidewalls form an incomplete ring, and the gap of the ring is closed by the sidewall of the flue 121 to separate the inside of the passage 122 and the inside of the flue 121.

[0126] In other examples, the sidewall of the passage 122 and the top wall of the battery cell 021 enclose a containing cavity. The temperature sensor 32 is located in the containing cavity. For example, the passage 122 includes four sidewalls, and the four sidewalls form a complete ring to separate the inside of the passage 122 and the inside of the flue 121.

[0127] In some examples, as shown in Figure 16 The temperature sensor 32 is located between the connection row 2 and the battery cell explosion-proof valve 0212, and the height of the sidewall of the passage 122 is higher than the battery cell explosion-proof valve 0212 and the temperature sensor 32.

[0128] In some examples, as shown in Figure 2As shown, the battery pack 001 further comprises a battery pack explosion-proof valve 04, which is arranged on the shell wall of the shell 01. In this way, when the amount of smoke sprayed by the cell explosion-proof valve 0212 of the cell 021 is large, the pressure inside the shell 01 is too high, and the battery pack explosion-proof valve 04 will be pressure relief, avoiding the explosion of the battery pack 001. Among them, the shell 01 is a sealed shell.

[0129] In some examples, as shown in Figure 14 and Figure 15 As shown, the insulating support 1 further comprises a first side plate 13 connected to one end of the main plate 10 of the insulating support 1. The first side plate 13 extends along the height direction of the battery module 02, and the first side plate 13 and the battery module 02 have a gap 130. The gap 130 is in communication with the flue 121. In this way, the smoke in the flue 121 can flow out from the gap 130 and flow into the inside of the shell 01. Among them, the first side plate 13 is perpendicular to the main plate 10, and the first side plate 13 is arranged in parallel with the bottom wall of the shell 01. Of course, in other examples, the insulating support 1 can also not include the first side plate 13, and one end of the flue 121 is open. In this way, the smoke can directly flow out through the opening.

[0130] In some examples, the battery pack explosion-proof valve 04 is located on the shell wall of the shell 01 opposite to the first side plate 13. Then the smoke in the flue 121 will flow towards the battery pack explosion-proof valve 04. In this way, after the battery pack explosion-proof valve 04 is opened, the smoke can be discharged more quickly through the battery pack explosion-proof valve 04, improving the exhaust efficiency of the smoke.

[0131] In some examples, the height of the battery pack explosion-proof valve 04 is lower than the height of the bottom end of the first side plate 13. In this way, the first side plate 13 can guide the smoke towards the battery pack explosion-proof valve 04.

[0132] In some examples, as shown in Figure 12 and Figure 13 As shown, the sampling plate fixing part 12 comprises a plurality of first grooves 123 on the side facing the battery module 02. The plurality of first grooves 123 are respectively opposite to the plurality of cell explosion-proof valves 0212 of the battery module 02. Among them, the first groove 123 is used to weaken the strength of the part where it is located, so that in the case that the smoke sprayed by the cell explosion-proof valve 0212 is too much and the temperature is too high in the later stage of thermal runaway, the smoke sprayed by the cell explosion-proof valve 0212 can break through the first groove 123. In this way, it is beneficial to the rapid diffusion of the smoke sprayed by the cell explosion-proof valve 0212 in the inside of the shell 01, reducing the possibility of explosion of the battery pack 001.

[0133] It should be noted that in the early stage of thermal runaway, the smoke and gas sprayed by the cell explosion valve 0212 is less and the temperature is lower, and the smoke and gas sprayed by the cell explosion valve 0212 will not break through the first groove 123, so the smoke and gas sprayed by the cell explosion valve 0212 still flows along the flue 121. That is, the first groove 123 is designed for the case that the thermal runaway of the cell 021 is extremely serious.

[0134] In some examples, as shown in Figure 12 and Figure 13 , the first groove 123 is a ring-shaped groove. Of course, in other examples, the first groove 123 can also be a rectangular groove, a circular groove, an oval groove, etc.

[0135] In addition, as shown in Figure 12 and Figure 13 , the side of the connection row fixing part 11 facing the battery module 02 is provided with a plurality of fourth grooves 116, and the fourth grooves 116 are in communication with the openings 112. The fourth grooves 116 are used for the pole 0211 of the cell 021 to extend into, so as to preliminarily limit the pole 0211.

[0136] Figure 17 A schematic view of the connection row 2, the first pole output row 4, the second pole output row 5 and the fuse 6 is shown. Figure 18 A schematic view of the electrical connection relationship of a plurality of cells 021 is shown. As shown in Figure 18 , under the electrical connection effect of the connection row 2, the plurality of cells 021 are connected in series.

[0137] In addition, in order to facilitate the battery pack 001 to output electric energy, in addition to the connection row 2, as shown in Figure 17 , the integrated busbar 03 also includes a first pole output row 4 and a second pole output row 5. One end of the first pole output row 4 and the second pole output row 5 is fixed on the connection row fixing part 11, and is respectively used for welding with a pole 0211. Under the effect of the connection row 2, the first pole output row 4 and the second pole output row 5, the current path of the battery module 02 is as shown in Figure 17 . Among them, one of the first pole output row 4 and the second pole output row 5 is a positive pole output row, and the other is a negative pole output row.

[0138] Figure 19 A schematic view of the second pole output row 5 is shown. In some examples, as shown in Figure 19As shown, the inner terminal 511 of the second pole output bus 5 also includes a second groove 21, and the bottom of the second groove 21 is also provided with a positioning through hole 22. The positioning through hole 22 is used to be aligned with the position of the pole post 0211 connected to the inner terminal 511, so as to facilitate welding the inner terminal 511 to the pole post 0211. It should be noted that the function of the second groove 21 and the positioning through hole 22 of the inner terminal 511 is the same as that of the second groove 21 and the positioning through hole 22 on the connecting bus 2. The only difference is that the connecting bus 2 is provided with two second grooves 21 and two positioning through holes 22, while the inner terminal 511 only needs to be welded to one pole post 0211, so it is only provided with one second groove 21 and one positioning through hole 22.

[0139] Figure 20 A schematic diagram of the first-stage output row 4 is shown. In some examples, such as... Figure 20 As shown, the first pole inner terminal 4111 of the first pole output bus 4 also includes a second groove 21, and the bottom of the second groove 21 is also provided with a positioning through hole 22. The positioning through hole 22 is used to be aligned with the position of the pole post 0211 connected to the first pole inner terminal 4111, so as to facilitate welding the first pole inner terminal 4111 to the pole post 0211. It should be noted that the function of the second groove 21 and the positioning through hole 22 of the first pole inner terminal 4111 is the same as that of the second groove 21 and the positioning through hole 22 on the connecting bus 2. The only difference is that the connecting bus 2 is provided with two second grooves 21 and two positioning through holes 22, while the first pole inner terminal 4111 only needs to be welded to one pole post 0211, so it is only provided with one second groove 21 and one positioning through hole 22.

[0140] In some examples, such as Figure 19 As shown, the two sidewalls opposite the inner terminal 511 of the second pole output row 5 also include two slots 23. The part of the connecting row fixing part 11 corresponding to the inner terminal 511 of the second pole is also provided with a receiving groove 111, and two buckles 113 are also provided in the receiving groove 111. The two buckles 113 are respectively engaged with the two slots 23 of the inner terminal 511 of the second pole.

[0141] In some examples, such as Figure 20 As shown, the two sidewalls opposite the first pole inner terminal 4111 of the first pole output row 4 also include two slots 23. The part of the connecting row fixing part 11 corresponding to the first pole inner terminal 4111 is also provided with a receiving groove 111, and two buckles 113 are also provided in the receiving groove 111. The two buckles 113 are respectively engaged with the two slots 23 of the first pole inner terminal 4111.

[0142] In some examples, such as Figure 5As shown, the insulating support 1 further comprises a second side plate 14 connected to one end of the main plate 10. The second side plate 14 is bent towards the battery module 02 relative to the main plate 10. In some examples, the second side plate 14 is perpendicular to the main plate 10.

[0143] In some examples, as shown in Figure 5 As shown, the outer ends of the first and second pole output rows 4 and 5 are fixed to the second side plate 14.

[0144] In some examples, as shown in Figure 5 As shown, one end of the second pole output row 5 is fixed to the connection row fixing portion 11 near the second side plate 14 and is electrically connected to one pole post 0211 of the battery cell 021 near the second side plate 14. One end of the first pole output row 4 is fixed to the connection row fixing portion 11 away from the second side plate 14 and is electrically connected to one pole post 0211 of the battery cell 021 away from the second side plate 14.

[0145] As shown in Figure 20 The first pole output row 4 comprises a first segment 411, a second segment 412 and a third segment 413 connected in sequence. As shown in Figure 5 The insulating support 1 further comprises a third side plate 15 connected to one side of the main plate 10 and located between the first side plate 13 and the second side plate 14. The first segment 411 is fixedly connected to the first side plate 13, the second segment 412 is fixedly connected to the third side plate 15, and the third segment 413 is fixedly connected to the second side plate 14. In some examples, the third side plate 15 is perpendicular to the main plate 10.

[0146] Figure 21 A partial enlarged view of the portion enclosed by the frame B in Figure 5 is shown. Figure 22 A partial enlarged view of the portion enclosed by the frame C in Figure 5 is shown. In some examples, as shown in Figure 5 , Figure 21 and Figure 22 The first side plate 13 is provided with a first limiting slot 131, and the third side plate 15 is provided with a second limiting slot 151. The first segment 411 extends into the first limiting slot 131, and the second segment 412 extends into the second limiting slot 151. In this way, the first side plate 13 and the third side plate 15 can not only separate the first pole output row 4 from the side wall of the battery module 02, but also separate the first pole output row 4 from the shell 01.

[0147] In some examples, as shown in Figure 19 and Figure 20As shown, the integrated busbar 03 further comprises an insulating sleeve 7, which surrounds the first pole output bus 4 and / or the second pole output bus 5. In this way, the insulating sleeve 7 separates the first pole output bus 4, the second pole output bus 5 from the battery module 02, avoiding the occurrence of arc ignition between the first pole output bus 4, the second pole output bus 5 and the battery module 02. At the same time, the insulating sleeve 7 also separates the first pole output bus 4, the second pole output bus 5 from the shell 01, avoiding the occurrence of electric shock danger. The material of the insulating sleeve 7 includes a ceramic composite material.

[0148] The implementation of the first pole output bus 4 and the second pole output bus 5 will be described below.

[0149] In some examples, the second pole output bus 5 is a negative pole output bus, and as shown, the second pole output bus 5 comprises a negative pole aluminum sheet 51 and a first negative pole copper sheet 52, which are connected in series. Among them, the insulating sleeve 7 surrounds the negative pole aluminum sheet 51. Figure 19

[0150] In some examples, as shown, the first pole output bus 4 comprises a positive pole aluminum sheet 41 and a positive pole copper sheet 42, which are connected in series. Among them, the positive pole aluminum sheet 41 comprises the first section 411, the second section 412 and the third section 413 described above. The positive pole copper sheet 42 is fixed to the third section 413. The insulating sleeve 7 surrounds the positive pole aluminum sheet 41, for example, the first section 411 and the second section 412 of the positive pole aluminum sheet 41. Figure 20

[0151] A partial enlarged view of the part framed by block I in Figure 23 Figure 17 Figure 17 As shown, the integrated busbar 03 further comprises a fuse 6, which is connected in series with the first pole output bus 4 or the second pole output bus 5. In this way, when the battery module 02 is short-circuited, causing the current of the first pole output bus 4 and the second pole output bus 5 to be too large, the fuse 6 will be fused to achieve short-circuit protection. Figure 23 In some examples, as shown, the fuse 6 is fixed to the side of the second side plate 14 away from the battery module 02.

[0152] Figure 5 In some examples, as shown, the second pole output bus 5 further comprises a second negative pole copper sheet 53, and the two ends of the fuse 6 are respectively electrically connected with the first negative pole copper sheet 52 and the second negative pole copper sheet 53.

[0153] In some examples, as shown, the second pole output bus 5 further comprises a second negative pole copper sheet 53, and the two ends of the fuse 6 are respectively electrically connected with the first negative pole copper sheet 52 and the second negative pole copper sheet 53. Figure 16 Figure 23 In some examples, as shown, the second pole output bus 5 further comprises a second negative pole copper sheet 53, and the two ends of the fuse 6 are respectively electrically connected with the first negative pole copper sheet 52 and the second negative pole copper sheet 53.

[0154] In some examples, as shown, the second pole output bus 5 further comprises a second negative pole copper sheet 53, and the two ends of the fuse 6 are respectively electrically connected with the first negative pole copper sheet 52 and the second negative pole copper sheet 53. Figure 5 ​​​​​As shown, the integrated busbar 03 further comprises a fuse cover plate 16, which is buckled on the second side plate 14 and covers the fuses 6.

[0155] In some examples, as shown in FIG. 6, the circuit board 31 comprises a first plate body 311 and a second plate body 312. Figure 10 As shown, the first plate body 311 is fixed to the sampling plate fixing portion 12, and a portion of the second plate body 312 is fixed to the second side plate 14, and the second plate body 312 is provided with a data output connector 34. The data output connector 34 is used to output the temperature collected by the temperature sensor 32 and the voltage collected by the nickel sheet 33. As shown in FIG. 6, the sampling plate fixing portion 12 is provided with a positioning pin 124 on the side facing away from the battery module 02. Figure 5 As shown, the first plate body 311 is provided with a pin shaft hole 3113, and the positioning pin 124 passes through the pin shaft hole 3113 to realize the positioning of the first plate body 311. Figure 9 Figure 11 As shown in FIG. 6, the first plate body 311 is provided with a pin shaft hole 3113, and the positioning pin 124 passes through the pin shaft hole 3113 to realize the positioning of the first plate body 311.

[0156] Figure 24 As shown in FIG. 6, the first plate body 311 is provided with a pin shaft hole 3113, and the positioning pin 124 passes through the pin shaft hole 3113 to realize the positioning of the first plate body 311. Figure 10 As shown in FIG. 6, the sampling plate 3 further comprises an OT terminal connector 35, which is electrically connected to the data output connector 34. Figure 24 As shown in FIG. 6, the sampling plate 3 further comprises an OT terminal connector 35, which is electrically connected to the data output connector 34. Figure 23 As shown in FIG. 6, the integrated busbar 03 further comprises an OT terminal 8 (or a circular cold-press terminal), which is arranged on the first pole output row 4 and / or the second pole output row 5, and is electrically connected to the OT terminal connector 35. The OT terminal 8 comprises an OT temperature collection terminal 81 and an OT voltage collection terminal 82. The OT temperature collection terminal 81 is used to collect the temperature of the first pole output row 4 and / or the second pole output row 5, and a temperature sensor (such as a thermistor) is arranged inside the tube column structure of the OT temperature collection terminal 81. The OT voltage collection terminal 82 is used to collect the voltage of the first pole output row 4 and / or the second pole output row 5.

[0157] As shown in FIG. 6, the sampling plate 3 further comprises an OT terminal connector 35, which is electrically connected to the data output connector 34. Figure 23 As shown in FIG. 6, the OT terminal 8 comprises three OT temperature collection terminals 81 and one OT voltage collection terminal 82. The three OT temperature collection terminals 81 are respectively fixed to the positive copper sheet 42, the first negative copper sheet 52 and the second negative copper sheet 53. The OT voltage collection terminal 82 is fixed to the second negative copper sheet 53. Of course, the OT voltage collection terminal 82 can also be fixed to the positive copper sheet 42 or the first negative copper sheet 52.

[0158] In some examples, in order to facilitate the fixation of the OT terminal connector 35, a reinforcing plate is arranged between the second plate body 312 and the second side plate 14. The reinforcing plate can be a piece of PCB board to improve the stability of the fixation of the OT terminal connector 35. ​

[0159] In some examples, as shown in Figure 5 The integrated busbar 03 further includes a first insulating sheet 9 attached to the side of the second side plate 14 facing the battery module 02. In this way, the first insulating sheet 9 separates the battery module 02 from the connectors, the battery management unit 05, the fuse 6, the output end of the second-pole output busbar 5, and the output end of the first-pole output busbar 4, preventing arc sparks from being transmitted to the battery module 02 and causing short circuit of the battery module 02. The material of the first insulating sheet 9 can include a ceramic composite material, and the first insulating sheet 9 can also be referred to as a first ceramic composite strip.

[0160] Next, the implementation of the shell 01 is exemplarily described.

[0161] In some examples, as shown in Figure 3 The shell 01 includes a bottom shell 011, a top cover 012, and an end cover assembly 013. The portion of the bottom shell 011 or the top cover 012 opposite the second side plate 14 is provided with a port 0111, and the end cover assembly 013 seals the port 0111. The end cover assembly 013 includes a receiving cavity. The battery pack 001 further includes a battery management unit 05, and the data output connector 34 of the sampling board 3 and the battery management unit 05 are located in the receiving cavity and electrically connected. Thus, the data output connector 34 can send the collected data to the battery management unit 05.

[0162] Figure 25 An exploded view of the end cover assembly 013 is shown, as shown in Figure 25 The end cover assembly 013 includes a first end plate 0131, a cover plate 0132, and a partition plate 0133. The first end plate 0131 is located at the port 0111, and the first end plate 0131 is provided with a connector through hole 01311 that is in communication with the port 0111 and is used for the data output connector 34 to pass through. The cover plate 0132 is fixedly connected with the first end plate 0131, and the cover plate 0132 and the first end plate 0131 enclose a receiving cavity. Figure 26 and Figure 27 A schematic view of the relative positions of the partition plate 0133 and the first end plate 0131 is shown, as shown in Figure 26 and Figure 27 The partition plate 0133 is located in the receiving cavity. The partition plate 0133 seals a portion of the connector through hole 01311, and a gap 01310 is formed between the partition plate 0133 and the hole wall of the connector through hole 01311. As shown in Figure 28 The board body of the sampling board 3 passes through the gap 01310. The battery management unit 05 is fixed to the side of the partition plate 0133 away from the first end plate 0131.

[0163] The size of the connector through hole 01311 is greater than the size of the data output connector 34, so that the data output connector 34 can pass through the connector through hole 01311 and be electrically connected with the battery management unit 05. After the data output connector 34 passes through the connector through hole 01311, the partition plate 0133 is used to close most of the connector through hole 01311, and only a gap 01310 is left for the second plate body 312 to pass through.

[0164] The technical scheme provided by the embodiments of the present disclosure is that the first end plate 0131 and the partition plate 0133 are arranged between the battery management unit 05 and the battery module 02, so that the first end plate 0131 and the partition plate 0133 separate the battery management unit 05 and the battery module 02, avoiding the transmission of sparks from the battery management unit 05 to the battery module 02, thereby preventing the damage of the battery module 02. In addition, by arranging the partition plate 0133 to close most of the connector through hole 01311 on the first end plate 0131 and only leaving a gap 01310 for the second plate body 312 to pass through, the isolation effect of the partition plate 0133 and the first end plate 0131 is improved.

[0165] Figure 30 An exploded view of the cladding assembly 022 of the battery module 02 is shown as Figure 30 As shown, the battery module 02 further includes a cladding assembly 022, and the cladding assembly 022 includes a bottom plate 0221, two side plates 0222, and two second end plates 0223. The bottom plate 0221, the two side plates 0222, and the two second end plates 0223 enclose a containing cavity, and a plurality of battery cells 021 are located in the containing cavity. Among them, one or more of the bottom plate 0221, the two second end plates 0223, and the two side plates 0222 include an insulating sheet 0220. Among them, the material of the insulating sheet 0220 can include a ceramic composite material, and the insulating sheet 0220 can also be referred to as a ceramic composite tape.

[0166] In some examples, as shown in Figure 29 and Figure 30 The cladding assembly 022 further includes a tightening band 0224, and the tightening band 0224 tightens the bottom plate 0221, the two second end plates 0223, and the two side plates 0222 on the plurality of battery cells 021. Among them, as shown in Figure 29 and Figure 30 The tightening band 0224 is two, and the two tightening bands 0224 are arranged along the height direction of the battery module 02.

[0167] In some examples, as shown in Figure 30 The battery module 02 further includes a plurality of flexible spacers 0225, and each flexible spacer 0225 is arranged between two adjacent battery cells 021.

[0168] In some examples, as shown in Figure 3As shown, the battery pack 001 also includes a second insulating sheet 07 covering one side of the battery module 02 away from the integrated busbar 03. In this way, the second insulating sheet 07 separates the integrated busbar 03 from the upper cover 012 of the shell 01, reducing the risk of electric shock for users. The material of the second insulating sheet 07 can include a ceramic composite material, and the second insulating sheet 07 can also be referred to as a second ceramic composite strip.

[0169] Next, the assembly steps of the integrated busbar 03 are exemplarily described.

[0170] First, the first insulating sheet 9 is attached to one side of the second side plate 14 of the insulating support 1 facing the battery module 02.

[0171] Second, the positive copper sheet 42 is assembled on the positive aluminum sheet 41 by screws. The insulating sleeve 7 is wrapped around the positive aluminum sheet 41. The assembled first pole output busbar 4 is inserted into the first limiting groove 131 of the first side plate 13 and the second limiting groove 151 of the third side plate 15 of the insulating support 1.

[0172] Third, each connection busbar 2 is respectively placed in the plurality of accommodating grooves 111 of the two connection busbar fixing portions 11.

[0173] Fourth, the first negative copper sheet 52 is assembled on one side of the second side plate 14 of the insulating support 1 away from the battery module 02. The insulating sleeve 7 is wrapped around the negative aluminum sheet 51, and the negative aluminum sheet 51 and the first negative copper sheet 52 are assembled together. Then, the negative aluminum sheet 51 is assembled on the insulating support 1.

[0174] Fifth, the sampling plate 3 is assembled in place by the pin shaft hole 3113 and the positioning pin 124 on the sampling plate fixing portion 12, and the nickel sheet 33 is welded on the connection busbar 2, the first pole output busbar 4 and the second pole output busbar 5.

[0175] Sixth, the fuse 6 is connected in series with the first negative copper sheet 52, the second negative copper sheet 53 is connected in series with the fuse 6, and the fuse cover plate 16 is buckled.

[0176] In summary, the battery pack 001 provided by the embodiment of the present disclosure integrates the temperature detection design, the voltage detection design, the directional smoke exhaust design, the high-temperature insulation design, the connection busbar variable cross-section design (i.e. the setting of the second groove 21) and the short-circuit protection design. The battery pack 001 provided by the embodiment of the present disclosure realizes multiple safety, and guarantees the safety of the battery pack 001 at each stage of avoiding thermal runaway of the battery cell 021, early thermal runaway of the battery cell 021 and late thermal runaway of the battery cell 021, and can more quickly monitor whether the battery pack 001 is in a safe state.

[0177] The embodiment of the present disclosure also provides a battery cabinet. As shown in Figure 31As shown, the battery cabinet comprises a cabinet body 002 and a plurality of battery packs 001. The plurality of battery packs 001 are electrically connected and located inside the cabinet body 002. Among them, the plurality of battery packs 001 can be connected in series or in parallel.

[0178] As shown in Figure 31 and Figure 32 , the battery cabinet comprises a connecting piece 003, which is used to connect the positive output terminal 08 and the negative output terminal 09 of the battery pack 001 with the positive output terminal 08 and the negative output terminal 09 of other battery packs 001, so as to realize the series or parallel connection of different battery packs 001.

[0179] Figure 33 As shown in the partial enlarged view of the part framed by block J in Figure 31 , as shown in Figure 33 , the battery pack explosion-proof valve 04 of the plurality of battery packs 001 are all communicated with the cabinet flue 0021 of the cabinet body 002. In this way, the smoke sprayed by the battery pack explosion-proof valve 04 of the battery pack 001 flows into the cabinet flue 0021 for directional smoke exhaust, and will not diffuse randomly, thereby improving the safety of the battery cabinet.

[0180] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood as the general meaning understood by those skilled in the art to which the present disclosure belongs. The above is only an optional embodiment of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A battery pack, characterized by, The battery pack includes a housing (01), a battery module (02), and an integrated busbar (03), wherein the battery module (02) and the integrated busbar (03) are located inside the housing (01); The battery module (02) includes at least one row of cells (021), and each row of cells (021) includes multiple cells (021). The integrated busbar (03) includes an insulating support (1), a connecting busbar (2) and a sampling plate (3). In the opening direction of the cell explosion-proof valve (0212) of the cell (021), the insulating support (1) is disposed on the battery module (02), the sampling plate (3) and the connecting busbar (2) are disposed on the insulating support (1), and the connecting busbar (2) is used to electrically connect at least one row of cells (021). The insulating support (1) includes a flue (121) and multiple channels (122). The flue (121) includes a bottom and two side walls. The flue (121) is fastened to a row of battery cells (021). The bottom of the flue faces the cell explosion-proof valve (0212) of the row of battery cells (021). The two side walls are located on both sides of the cell explosion-proof valve (0212) of the row of battery cells (021). The bottom of the flue (121) is provided with the opening of the plurality of channels (122). The sidewalls of the plurality of channels (122) extend along the opening direction of the battery cell explosion-proof valve (0212). One end of the sidewall of the plurality of channels (122) is connected to the opening, and the other end of the sidewall of the plurality of channels (122) is connected to the battery cell (021). Multiple temperature sensors (32) electrically connected to the sampling plate (3) respectively pass through the multiple channels (122) and contact the battery cell (021). The positions of the channels (122) are offset from the battery cell explosion-proof valve (0212). The sidewall of the channel (122), the sidewall of the flue (121), and the top wall of the battery cell (021) form a cavity, and the temperature sensor (32) is located inside the cavity; or, the sidewall of the channel (122) and the top wall of the battery cell (021) form a cavity, and the temperature sensor (32) is located inside the cavity.

2. The battery pack of claim 1, wherein, The temperature sensor (32) is located between the connecting bar (2) and the cell explosion-proof valve (0212), and the height of the side wall of the channel (122) is higher than the cell explosion-proof valve (0212) and the temperature sensor (32).

3. The battery pack of claim 1, wherein, The insulating support (1) includes a main plate (10), the main plate (10) includes two connecting row fixing parts (11) and a sampling plate fixing part (12) located between the two connecting row fixing parts (11). The two connecting row fixing parts (11) are used to fix the connecting row (2) respectively, and the sampling plate fixing part (12) is used to fix the sampling plate (3). The flue (121) and the channel (122) are located on the sampling plate fixing part (12). The insulating support (1) includes a first side plate (13), which is connected to one end of the sampling plate fixing part (12). The first side plate (13) extends along the height direction of the battery module (02) and has a gap (130) between it and the side wall of the battery module (02). The gap (130) communicates with the flue (121).

4. The battery pack of claim 3, wherein, The battery pack (001) also includes a battery pack explosion-proof valve (04), which is located on the shell wall of the housing (01) opposite to the first side plate (13).

5. The battery pack of claim 3 or 4, wherein, The bottom of the flue (121) includes a plurality of first grooves (124), which are respectively arranged opposite to the plurality of cell explosion-proof valves (0212) of the battery module (02).

6. The battery pack of claim 3 or 4, wherein, Each of the connecting bars (2) includes two second grooves (21), and the bottom of each of the two second grooves (21) has a positioning through hole (22), which is opposite to the two pole posts (0211) connected to the connecting bar (2).

7. The battery pack of claim 3 or 4, wherein, The connecting bar fixing part (11) on the side facing away from the battery module (02) includes a plurality of receiving grooves (111), and the bottom of the receiving groove (111) has two openings (112), through which the two terminals (0211) of the battery module (02) pass respectively. Each of the connecting rows (2) is located in one of the receiving slots (111) and is welded to the two pole posts (0211).

8. The battery pack of claim 7, wherein, Each of the receiving slots (111) has two opposite sidewalls provided with buckles (113), and each of the connecting rows (2) has two opposite sidewalls provided with slots (23), with the two buckles (113) located in the two slots (23) respectively.

9. The battery pack of claim 7, wherein, The height of the sidewall of the receiving groove (111) is higher than the height of the connecting row (2).

10. The battery pack of claim 3, wherein, The insulating bracket (1) further includes a second side plate (14), which is connected to one end of the main body plate (10) and is disposed opposite to the first side plate (13); The integrated busbar (03) further includes a first pole output busbar (4) and a second pole output busbar (5). One end of the first pole output busbar (4) is fixed to the end of the connecting busbar fixing part (11) away from the second side plate (14) and is electrically connected to the pole post (0211) of the cell (021) away from the second side plate (14). One end of the second pole output busbar (5) is fixed to the end of the connecting busbar fixing part (11) near the second side plate (14) and is electrically connected to the pole post (0211) of the cell (021) near the second side plate (14). The other ends of the first pole output row (4) and the second pole output row (5) are both fixed to the second side plate (14). One of the first pole output row (4) and the second pole output row (5) is a positive pole output row, and the other is a negative pole output row.

11. The battery pack of claim 10, wherein, The insulating bracket (1) also includes a third side plate (15), which is connected to one side of the main body plate (10) and is located between the first side plate (13) and the second side plate (14); The first side plate (13) is provided with a first limiting groove (131), and the third side plate (15) is provided with a second limiting groove (151). The first pole output row (4) includes a first section (411), a second section (412) and a third section (413) connected in sequence. The first section (411) extends into the first limiting groove (131), the second section (412) extends into the second limiting groove (151), and the third section (413) is fixed to the second side plate (14).

12. The battery pack of claim 10 or 11, wherein, The integrated busbar (03) also includes a fuse (6), which is connected in series with the first pole output busbar (4) or the second pole output busbar (5). The fuse (6) is fixed to the side of the second side plate (14) facing away from the battery module (02).

13. The battery pack of claim 10 or 11, wherein, The integrated busbar (03) also includes at least one insulating sleeve (7), which surrounds the first pole output busbar (4) and / or the second pole output busbar (5).

14. The battery pack of claim 10 or 11, wherein, The sampling board (3) also includes a circuit board (31), which includes a first board body (311) and a second board body (312). The first board body (311) is fixed to the sampling board fixing part (12), the second board body (312) is bent relative to the first board body (311), and a part of the second board body (312) is fixed to the second side plate (14). The sampling board (3) also includes a data output connector (34), which is fixed to the end of the second board (312) away from the first board (311).

15. The battery pack according to claim 14, characterized in that, The sampling board (3) also includes an OT terminal connector (35), which is fixed to the second board body (312) and electrically connected to the data output connector (34); The integrated busbar (03) further includes at least one OT terminal (8), which is located on the first pole output busbar (4) and / or the second pole output busbar (5), and is electrically connected to the OT terminal connector (35).

16. The battery pack according to claim 14, characterized in that, The housing (01) includes a bottom shell (011), a top cover (012), and an end cap assembly (013). The bottom shell (011) or the top cover (012) opposite to the second side plate (14) is provided with a port (0111). The end cap assembly (013) closes the port (0111) and includes a receiving cavity. The battery pack (001) also includes a battery management unit (05), which is located in the receiving cavity and electrically connected to the data output connector (34).

17. The battery pack according to claim 16, characterized in that, The end cap assembly (013) includes a first end plate (0131), a cover plate (0132), and a partition plate (0133). The first end plate (0131) is located at the port (0111), and the first end plate (0131) is provided with a connector through hole (01311) for the data output connector (34) to pass through; The cover plate (0132) and the first end plate (0131) form the receiving cavity, the partition plate (0133) is located in the receiving cavity and closes a part of the connector through hole (01311), and there is a gap (01310) between the partition plate (0133) and the hole wall of the connector through hole (01311). The second plate (312) passes through the gap (01310), and the battery management unit (05) is fixed to the side of the partition (0133) facing away from the first end plate (0131).

18. The battery pack according to claim 10 or 11, characterized in that, The integrated busbar (03) also includes a first insulating sheet (9), which is attached to the side of the second side plate (14) facing the battery module (02).

19. A battery cabinet, characterized in that, The battery cabinet includes a cabinet body (002) and a plurality of battery packs (001) as described in any one of claims 1-18, wherein the plurality of battery packs (001) are electrically connected and located inside the cabinet body (002); The battery pack (001) includes a battery pack explosion-proof valve (04), and the battery pack explosion-proof valves (04) of the multiple battery packs (001) are all connected to the cabinet flue (0021) of the cabinet (002).

Images