Battery pack and energy storage cabinet

Abstract

The invention 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 bar and a sampling plate. The insulating bracket includes a flue and a plurality of channels. The groove bottom of the flue faces the battery cell explosion-proof valve of the column of battery cells, and the two side walls of the flue are located on the two sides of the battery cell explosion-proof valve of the column of battery cells. Openings of the multiple channels are formed in the groove bottom of the flue, one ends of the side walls of the multiple channels are connected with the openings, and the other ends of the side walls of the multiple channels are connected with the battery cells. A temperature sensor electrically connected with the sampling plate penetrates through the channels to be in contact with the battery cell, the channels and the battery cell anti-explosion valve are staggered in position, and the temperature sensor and the battery cell anti-explosion valve are separated through the side walls of the multiple channels. The temperature sensor in the battery pack provided by the invention can collect the temperature of the battery cell. And moreover, the interior of the channel is separated from the interior of the flue, so that the flue gas sprayed out of the battery cell explosion-proof valve cannot flow to one side, back to the battery module, of the integrated busbar along the channel.

Description

Technical Field

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

[0002] The battery pack includes a battery module and an integrated busbar. The integrated busbar can also be called a cell connection system (CCS).

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

[0004] However, the temperature of the connection bar obtained by the battery management unit does not accurately represent the temperature of the battery cell, which is not conducive to the battery management unit's temperature control protection of the battery cell, reducing the safety of the battery pack. In addition, the battery cell will emit a large amount of smoke when it is in thermal runaway. If the smoke spreads randomly, it will corrode the connection bar and the sampling plate, causing the thermal runaway phenomenon of the battery pack to worsen, which also reduces the safety of the battery pack. Summary of the invention

[0005] The present disclosure provides a battery pack and a battery cabinet. Multiple temperature sensors of the integrated busbar of the battery pack can contact multiple battery cells of the battery module and directly collect the temperature of the battery cells. In addition, a flue for the flow of smoke ejected from the explosion-proof valve of the battery cell is formed between the integrated busbar and the battery module. The technical solutions of the battery pack and the battery cabinet are as follows.

[0006] In a first aspect, the present disclosure provides a battery pack. The battery pack includes a shell, a battery module and an integrated busbar. The battery module and the integrated busbar are located inside the shell. The battery module includes at least one column of cells, and each column of cells includes a plurality of cells. The integrated busbar includes an insulating bracket, a connecting bar and a sampling plate. In the valve opening direction of the cell explosion-proof valve of the cell, the insulating bracket is arranged on the battery module, and the sampling plate and the connecting bar are arranged on the insulating bracket. The connecting bar is used to electrically connect at least one column of cells. The insulating bracket includes a flue, the flue includes a groove bottom and two first side walls, the flue is buckled on a column of cells, the groove bottom of the flue faces the cell explosion-proof valve of a column of cells, and the two first side walls of the flue are located on both sides of the cell explosion-proof valve of a column of cells. The flue bottom is provided with openings of multiple channels. The side walls of the multiple channels extend along the valve opening direction of the cell explosion-proof valve, one end of the side walls of the multiple channels is connected to the opening, and the other end of the side walls of the multiple channels is connected to the cell. The temperature sensor electrically connected to the sampling plate contacts the cell through the channel. The positions of the channels are staggered with the battery cell explosion-proof valves, and the side walls of the multiple channels separate the temperature sensors and the battery cell explosion-proof valves.

[0007] Among them, the battery pack provided by the present disclosure is used in application scenarios such as data centers, site energy, industrial and commercial energy storage, or power station energy storage. The insulating bracket can be made of high-temperature resistant plastic material. Compared with the hot pressing film, the insulating bracket has better high-temperature resistance, so that in the early stage of thermal runaway of the battery module, the sampling plate will not be melted and damaged under the heat insulation effect of the insulating bracket. The two groups of connecting rows are electrically connected to the two columns of the battery module respectively to realize the series or parallel connection of multiple 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 battery cell explosion-proof valve is the direction from low to high of the battery module.

[0008] The technical solution provided by the present disclosure is that the smoke emitted by the explosion-proof valve of the battery cell will flow into the flue. Under the blocking effect of the two side walls of the flue, the smoke will not flow to the two sides of the flue, and will not corrode the poles and connecting bars on both sides of the flue, thereby reducing the short-circuit risk of the battery module, and thus reducing the possibility of further deterioration of the thermal runaway of the battery pack. In addition, by setting one end of the side wall of multiple channels connected to the opening of the flue bottom, 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 conducive to the battery management unit to perform temperature control protection on the battery cell and improve the safety of the battery pack. On the other hand, the interior of the channel is separated from the interior 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 will not be directly ejected through the channel to the side of the integrated busbar facing away from the battery module. In this way, the flue gas will not corrode the sampling plate and the connecting bar, reducing the risk of failure of the sampling plate and the risk of short circuit of the battery module, and also reducing the possibility of further deterioration of thermal runaway of the battery pack.

[0009] In one implementation, the side walls of the multiple channels, the side walls of the flue and the top wall of the battery cell form a receiving cavity, and the temperature sensor is located in the receiving cavity. The side walls of the multiple channels form an incomplete ring, and the gap of the ring is closed by the side walls of the flue, so that the interior of the channel is separated from the interior of the flue.

[0010] In one implementation, the side walls of the multiple channels and the top wall of the battery cell form a receiving cavity, and the temperature sensor is located in the receiving cavity. The side walls of the multiple channels form a complete ring, and the side walls of the multiple channels separate the interior of the channel from the interior of the flue.

[0011] In one implementation, the temperature sensor is located between the connection bar and the battery cell explosion-proof valve, and the side wall of the channel is higher than the battery cell explosion-proof valve and the temperature sensor.

[0012] In one implementation, the insulating bracket includes a main body plate. The main body plate includes two connecting row fixing parts and a sampling plate fixing part located between the two connecting row fixing parts. The two connecting row fixing parts are respectively used to fix the connecting rows. The sampling plate fixing part is used to fix the sampling plate, and the flue and the channel are arranged at the sampling plate fixing part. The insulating bracket includes a first side plate, the first side plate is connected to one end of the sampling plate fixing part, the first side plate extends along the height direction of the battery module, and there is a gap between the first side plate and the side wall of the battery module, and the gap is connected to the flue. In this way, the smoke in the flue can flow out through the gap and flow into the interior of the shell. Wherein, the first side plate is arranged at intervals from the bottom wall of the shell so that the smoke in the gap can flow out smoothly.

[0013] In one implementation, the battery pack further includes a battery pack explosion-proof valve, and the battery pack explosion-proof valve is disposed on a shell wall of the shell body opposite to the first side plate.

[0014] In this way, when the amount of smoke discharged from the flue is too large and the pressure inside the shell is too high, the battery pack explosion-proof valve explodes to reduce the possibility of battery pack explosion. In addition, since the shell wall where the battery explosion-proof valve is located is opposite to the first side plate, when the battery pack explosion-proof valve explodes, the smoke flowing out of the gap can be discharged from the battery pack explosion-proof valve more quickly, thereby improving the exhaust efficiency of the smoke.

[0015] In one implementation, the height of the battery pack explosion-proof valve is lower than the height of the bottom end of the first side plate, so that the first side plate can guide the smoke toward the battery pack explosion-proof valve.

[0016] In one implementation, the flue bottom includes a plurality of first grooves, and the plurality of first grooves are respectively arranged opposite to the plurality of battery cell explosion-proof valves of the battery module. Among them, the thickness of the bottom of the first groove is less than the thickness of the bottom of the flue. The first groove is used to thin the insulating bracket to weaken the strength of the part where it is located. In this way, in the later stage of thermal runaway, when the smoke ejected from the battery cell explosion-proof valve is too much and the temperature is too high, the smoke ejected from the battery cell explosion-proof valve can break through the part where the first groove is located on the fixed part of the sampling plate. It is conducive to the rapid diffusion of the smoke ejected from the battery cell explosion-proof valve inside the shell, reducing the possibility of explosion of the battery pack.

[0017] In one implementation, each connection row includes two second grooves. The bottoms of the two second grooves each have a positioning through hole, and the two positioning through holes are respectively opposite to the two poles connected to the connection row. The positioning through holes are used to locate the relative position relationship between the connection row and the pole during the welding process between the connection row and the pole. Each connection row is used to electrically connect to the poles of two battery cells to connect the two battery cells in series or in parallel.

[0018] The technical solution provided by the present disclosure, on the one hand, by providing two second grooves at the positions of the connecting bar corresponding to the two poles, the thickness of the portion of the connecting bar used for welding with the poles is reduced, which is conducive to improving the reliability of welding between the connecting bar and the two poles. On the other hand, if the thickness of the portion between the two second grooves on the connecting bar is not reduced, the connecting bar can still carry a large current.

[0019] In one implementation, the side of the connection bar fixing portion facing away from the battery module includes a plurality of receiving grooves. The bottom of the receiving groove has two openings, and the two poles of the battery module pass through the two openings respectively. Each connection bar is located in one receiving groove.

[0020] The technical solution provided by the present disclosure provides a receiving groove in the connecting bar fixing portion, which, on the one hand, facilitates the fixing of the connecting bar. On the other hand, the notch of the receiving groove faces the top cover of the shell, so that most of the area of ​​the connecting bar facing the top cover is exposed, which is conducive to the heat of the connecting bar being transferred to the top cover and dissipated through the top cover.

[0021] In one implementation, two opposite side walls of each receiving groove are provided with buckles, and two opposite side walls of each connecting row are provided with bayonet holes, and two buckles are respectively located in the two bayonet holes. The bayonet connection method facilitates the bayonet connection between the connecting row and the fixing part of the connecting row.

[0022] In one implementation, the height of the side wall of the receiving groove is higher than the height of the connecting row.

[0023] The technical solution provided by the present disclosure is that when a conductive foreign object (such as a screw) falls on the integrated busbar and is opposite to two adjacent receiving slots, under the action of the side wall between the two adjacent receiving slots, one end of the conductive foreign object sinks and contacts the connection row on one side of the side wall, and the other end of the conductive foreign object rises and cannot contact the connection row on the other side of the side wall, so that the connection rows on both sides of the side wall will not short-circuit. This improves the safety of the battery pack during use and manufacturing.

[0024] In one implementation, the insulating support also includes a second side plate, which is connected to one end of the main plate and is arranged opposite to the first side plate. The integrated busbar also includes a first pole output row and a second pole output row. One end of the first pole output row is fixed to an end of the connecting row fixing portion away from the second side plate, and is electrically connected to the pole of the battery cell away from the second side plate. One end of the second pole output row is fixed to an end of the connecting row fixing portion close to the second side plate, and is electrically connected to the pole of the battery cell close to the second side plate. The other ends (i.e., external ends) of the first pole output row and the second pole output row are both fixed to the second side plate. Among them, one of the first pole output row and the second pole output row is a positive pole output row, and the other is a negative pole output row. The provision of the second side plate facilitates the fixing of the external ends of the first pole output row and the second pole output row.

[0025] In one implementation, the insulating bracket also includes a third side plate. The third side plate is connected to one side of the main body plate and is 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 includes a first section, a second section and a third section connected in sequence, the first section extends into the first limiting groove, the second section extends into the second limiting groove, and the third section is fixed to the second side plate. Among them, the setting of the first limiting groove and the second limiting groove, on the one hand, enables the first side plate and the third side plate to separate the first pole output row from the side wall of the battery module, thereby avoiding arc ignition between the first pole output row, the second pole output row and 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 one implementation, the integrated busbar further includes at least one insulating sleeve, which surrounds the first pole output bar and / or the second pole output bar, wherein the insulating sleeve is made of a ceramic composite material.

[0027] The technical solution provided by the present disclosure is to put an insulating sleeve around 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 arc ignition between the first pole output row and the second pole output row and 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 housing to avoid the risk of electric shock.

[0028] In one implementation, the integrated busbar further includes a fuse, which is connected in series with the first pole output row or the second pole output row. The fuse is fixed to a side of the battery module that is opposite to the second side plate. In this way, when the battery module is short-circuited so that the current of the first pole output row and the second pole output row is too large, the fuse will melt to achieve short-circuit protection.

[0029] In one implementation, the circuit board includes a first board and a second board. The first board is fixed to the fixed portion of the sampling board, the second board is bent relative to the first board, and a portion of the second board is fixed to the second side plate. The sampling board also includes a data output connector, which is fixed to an end of the second board away from the first board. The data output connector is used to dock with a battery management unit to output the information collected by the sampling board to the battery management unit, so that the battery management unit can manage the cells in the battery pack based on the received information.

[0030] In one implementation, the sampling board further includes an OT terminal connector, which is fixed to the second board body and electrically connected to the data output connector. The integrated busbar further includes at least one OT terminal. The OT terminal is provided at the first pole output row and / or the second pole output row, and the OT terminal is electrically connected to the OT terminal connector.

[0031] Among them, the OT terminal includes an OT temperature terminal and an OT voltage terminal. The OT temperature terminal is used to collect the temperature of the first pole output row and / or the second pole output row, and the OT voltage terminal is used to collect the voltage of the first pole output row and / or the second pole output row. The information collected 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 one implementation, the housing includes a bottom shell, a top cover, and an end cover assembly. The bottom shell or the top cover is provided with a port at a portion opposite to the second side plate, and the end cover assembly closes the port. The end cover assembly includes a receiving cavity, and the battery pack also includes a battery management unit, and the battery management unit and the data output connector are located in the receiving cavity and are electrically connected. Among them, since the battery management unit is provided in the receiving cavity of the end cover assembly, the battery management unit and the battery module are separated by the end cover assembly, which reduces the possibility of sparks generated by the battery management unit being transmitted to the battery module.

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

[0034] The technical solution provided by the present disclosure provides a connector perforation on the first end plate, so that the data output connector can extend through the connector perforation to the other side of the first end plate, thereby ensuring the normal docking of the data output connector and the battery management board. A partition is provided to close a part of the connector perforation, leaving only a gap for the second board to pass through, and the battery management unit is provided on the side of the partition facing away from the first end plate, so that the battery management unit and the battery module are almost completely separated by the first end plate and the partition, thereby reducing the possibility of sparks generated by the battery management unit being transmitted to the battery module.

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

[0036] Wherein, the first insulating sheet includes a ceramic composite material, and the first insulating sheet can be called a first ceramic composite tape. 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 includes a cabinet and a plurality of battery packs as described in any one of the first aspects. The plurality of battery packs are electrically connected and are located inside the cabinet. Among them, the plurality of battery packs are connected in series or in parallel. The battery pack includes a battery pack explosion-proof valve, and the battery pack explosion-proof valves of the plurality of battery packs are all connected to the cabinet flue of the cabinet. In this way, the smoke exhausted by the battery pack explosion-proof valve is discharged through the cabinet flue, thereby preventing the smoke ejected after the battery pack explosion-proof valve explodes from polluting the environment. BRIEF DESCRIPTION OF THE 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 in 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 yes Figure 5 A partial enlarged view of the portion framed by box A in FIG.

[0044] Figure 7 is a schematic diagram of a conductive bar 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] Fig. 9 yes Figure 8 A partial enlarged view of the portion framed by box D in FIG.

[0047] Fig.10 is a schematic diagram of a sampling plate provided in an embodiment of the present disclosure;

[0048] Fig.11 yes Fig.10 A partial enlarged view of the portion framed by box E in FIG.

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

[0050] Fig.13 yes Fig.12 A partial enlarged view of the portion framed by middle frame G;

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

[0052] Fig.15 yes Fig.14 A partial enlarged view of the portion framed by the middle frame H;

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

[0054] Fig.17 It is a schematic diagram of a connection bar, a first-pole output bar, a second-pole output bar and a fuse provided in an embodiment of the present disclosure;

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

[0056] Fig.19 is a schematic diagram of a second pole output row and an insulating sleeve provided by an embodiment of the present disclosure;

[0057] Fig. 20 is a schematic diagram of a first-pole output row and an insulating sleeve provided in an embodiment of the present disclosure;

[0058] Fig.21 yes Figure 5 A partial enlarged view of the portion framed by box B in FIG.

[0059] Fig. 22 yes Figure 5 A partial enlarged view of the portion framed by box C in FIG.

[0060] Fig.23 yes Fig.17 A partial enlarged view of the portion framed by middle frame I;

[0061] Fig.24 yes Fig.10 A partial enlarged view of the portion framed by middle frame F;

[0062] Fig.25 It is a schematic diagram of an end cap assembly, a battery management unit, a positive output terminal and a negative output terminal provided in an embodiment of the present disclosure;

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

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

[0065] Fig.28is a schematic diagram of a sampling plate and an end cover assembly provided by an embodiment of the present disclosure;

[0066] Fig.29 is an exploded view of a battery module provided by an embodiment of the present disclosure;

[0067] Fig.30 is an exploded view of a covering component provided by an embodiment of the present disclosure;

[0068] Fig.31 is a schematic diagram of a battery cabinet provided in an embodiment of the present disclosure;

[0069] Fig.32 is a schematic diagram of a battery pack and a connector provided by an embodiment of the present disclosure;

[0070] Fig.33 yes Fig.31 A partial enlarged view of the portion framed by box J in FIG.

[0071] Legend

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

[0073] 01, shell, 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;

[0074] 02, battery module, 021, battery cell, 0211, pole, 0212, battery cell explosion-proof valve, 0213, slot, 022, covering component, 0220, insulating sheet, 0221, bottom plate, 0222, side plate, 0223, second end plate, 0224, tightening belt, 0225, flexible partition;

[0075] 03. Integrated busbar;

[0076] 04. Battery pack explosion-proof valve;

[0077] 05. Battery management unit, 051. Battery management unit connector;

[0078] 06. Thermal pad;

[0079] 07. Second insulating sheet;

[0080] 08. Positive output terminal;

[0081] 09. Negative output terminal;

[0082] 1. Insulating bracket, 10. Main body plate, 11. Connecting row fixing portion, 111. Accommodating groove, 112. Opening, 113. Buckle, 114. Side wall, 115. Positioning strip, 116. Fourth groove, 12. Sampling plate fixing portion, 121. Flue, 122. Channel, 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. connecting row, 21. second groove, 22. positioning through hole, 23. bayonet, 24. positioning port;

[0084] 3. sampling board, 31. circuit board, 311. first board, 3111. opening, 3112. connecting strip, 3113. pin hole, 312. second board, 32. temperature sensor, 33. nickel sheet, 34. data output connector, 35. OT terminal connector;

[0085] 4. first pole output row, 41. positive pole aluminum sheet, 411. first section, 4111. first pole internal connection terminal, 412. second section, 413. third section, 42. positive pole copper sheet;

[0086] 5. second pole output row, 51. negative pole aluminum sheet, 511. second pole internal connection terminal, 52. first negative pole copper sheet, 53. second negative pole copper sheet;

[0087] 6. Fuse;

[0088] 7. Insulation sleeve;

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

[0090] 9. The first insulating sheet. DETAILED DESCRIPTION

[0091] Generally speaking, in order to increase the capacity of a battery pack, the battery pack includes multiple cells connected in series or in parallel. In addition, in order to detect the working status, state of charge, thermal runaway risk, and thermal management requirements of the battery cell in real time, it is necessary to detect the temperature of the battery cell 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. Therefore, the accuracy of temperature sampling is crucial for the efficient and safe use of the battery.

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

[0093] However, the temperature of the connecting bar is not the same as the temperature of the battery cell, and after the temperature of the battery cell rises, it takes a certain amount of time for the heat to be transferred to the connecting bar, which makes the temperature obtained by the battery management unit inaccurate and untimely. This is not conducive to the battery management unit to perform temperature control protection on the battery cell, and reduces the safety of the battery pack.

[0094] In addition, the battery cell is equipped with a battery cell explosion-proof valve. When the battery cell has thermal runaway, the battery cell explosion-proof valve will emit high-temperature and corrosive smoke. The smoke will corrode the connecting bar and the sampling plate, which may further aggravate the thermal runaway of the battery cell and reduce the safety of the battery pack.

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

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

[0097] Figure 4 Schematic diagram of battery module 02 and integrated busbar 03 is shown. 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 poles 0211 (a positive pole and a negative pole), and the poles 0211 of each column of battery cells 021 are arranged in two rows. A battery cell explosion-proof valve 0212 is arranged between the two poles 0211 of each battery cell 021. The battery cell explosion-proof valve 0212 is used to release pressure when the battery cell 021 is under thermal runaway to prevent the battery cell 021 from exploding. Among them, in order to achieve that when the internal pressure of the battery cell 021 is too high, the smoke inside the battery cell 021 breaks through the battery cell explosion-proof valve 0212, the structural strength of the battery cell explosion-proof valve 0212 is relatively low.

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

[0099] Figure 6 Shows Figure 5 A partial enlarged view of the part framed by box A in FIG. Figure 5 and Figure 6 As shown, the side of the connecting bar fixing portion 11 facing away from the battery module 02 includes a plurality of receiving grooves 111, and the bottom of the receiving groove 111 is provided with two openings 112, and the two openings 112 are used for two poles 0211 connected to the connecting bar 2 to pass through. Each connecting bar 2 is limited to one receiving groove 111.

[0100] The technical solution provided by the embodiment of the present disclosure is to provide a receiving groove 111 on the side of the connecting bar fixing portion 11 facing away from the battery module 02, which, on the one hand, facilitates the fixing of the connecting bar 2. On the other hand, the notch of the receiving groove 111 faces the top cover 012 of the shell 01, so that most of the area of ​​the connecting bar 2 facing the top cover 012 is exposed, which is conducive to the heat of the connecting bar 2 being conducted to the top cover 012 and dissipated through the top cover 012. It should be noted that in order to prevent conductive foreign matter in the related art, the side of the connecting bar 2 facing the top cover 012 is coated, which is not conducive to the heat dissipation of the connecting bar 2.

[0101] In some examples, such as Figure 3 As shown, the battery pack 001 further includes a plurality of heat-conducting pads 06 . The heat-conducting pads 06 are attached to the connecting bars 2 , and are used to conduct the heat of the connecting bars 2 to the top cover 012 of the housing 01 .

[0102] In some examples, such as Figure 6 As shown, two opposite side walls of the receiving groove 111 are provided with buckles 113 . Figure 7 A schematic diagram of the connection row 2 is shown, as Figure 7 As shown, two opposite side walls of the connecting row 2 are provided with snap-on openings 23 . Figure 8 shows a schematic diagram of the integrated busbar 03, Fig. 9 Shows Figure 8 A partial enlarged view of the portion framed by box D in FIG. Fig. 9 As shown, the two buckles 113 are respectively located in the two bayonet holes 23. The bayonet connection method facilitates the installation of the connection row 2.

[0103] In some examples, such as Figure 6 As shown, the dimension of the buckle 113 along the length direction of the connecting row fixing portion 11 is L1. Figure 7 As shown, the size of the bayonet 23 along the length direction of the connecting row fixing portion 11 is L2, wherein L1 is smaller than L2. Fig. 9 As shown, there is a gap between the buckle 113 and the two side walls of the bayonet 23, and the connecting bar 2 can be offset in the length direction of the connecting bar fixing portion 11, which makes it possible to adjust the position of the connecting bar 2 during the welding process of the connecting bar 2 and the pole 0211 so that the alignment degree between the connecting bar 2 and the pole 0211 is higher.

[0104] In some examples, such as Figure 6 As shown, the distance between the head of the buckle 113 and the bottom of the receiving groove 111 is d1. Figure 7 As shown, the thickness of the connecting row 2 at the bayonet 23 is d2, wherein d2 is smaller than d1. Fig. 9 As shown, there is a gap between the head of the buckle 113 and the bottom of the bayonet 23. In this way, the connection bar 2 can be offset in the thickness direction of the connection bar fixing portion 11. This is conducive to adjusting the posture of the connection bar 2 during the welding process of the connection bar 2 and the pole 0211, which is conducive to improving the reliability of welding.

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

[0106] In some examples, such as Fig. 9As shown, the height of the side wall 114 of the receiving groove 111 is higher than the height of the connection row 2. In this way, when a conductive foreign object (such as a screw) falls on the integrated busbar 03 and contacts the side wall 114, one end of the conductive foreign object sinks and contacts the connection row 2 on one side of the side wall 114, and the other end of the conductive foreign object rises 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 will not be short-circuited, thereby improving the safety of the battery pack 001 during use and manufacturing.

[0107] The connecting bar 2 is used to realize the series or parallel connection of the battery cells 021. The greater the current carried by the connecting bar 2, the thicker the connecting bar 2 needs to be. However, the thicker the connecting bar 2 is, the more difficult it is to weld the connecting bar 2 to the pole 0211 of the battery cell 021, and there is a possibility that the laser welding may not penetrate.

[0108] In order to take into account the large current and improve the reliability of welding between the connecting bar 2 and the pole 0211, in some examples, such as Figure 7 As shown, two second grooves 21 are provided on the side of the connecting bar 2 facing away from the battery module 02, and positioning through holes 22 are provided at the bottom of the two second grooves 21. The two positioning through holes 22 are used to be opposite to the positions of the two poles 0211 connected to the connecting bar 2, so as to facilitate the positioning of the connecting bar 2 when welding the connecting bar 2 to the pole 0211. Among them, the connecting bar 2 can be made of aluminum, which can be called aluminum bar. When assembling the battery pack, a camera will take pictures of the positioning through holes 22 and the pole 0211, and analyze whether the square positioning through holes 22 are aligned with the circular grooves on the pole 0211 (such as Figure 4 As shown), the coaxial line is used to locate the relative positions of the connecting row 2 and the pole 0211.

[0109] The technical solution provided by the embodiment of the present disclosure provides two second grooves 21 at the positions of the connection bar 2 corresponding to the two poles 0211, so that the thickness of the portion where the connection bar 2 is welded to the pole 0211 is relatively thin, which is beneficial to improving the reliability of the welding between the connection bar 2 and the two poles 0211. On the other hand, the thickness of the portion between the two second grooves 21 on the connection bar 2 is not reduced, so the connection bar 2 can still carry a large current. Figure 6 The arrows in the figure show the direction of current flow.

[0110] like Figure 6 As shown, the sampling plate fixing portion 12 includes a plurality of channels 122, and the plurality of channels 122 penetrate the sampling plate fixing portion 12 along the thickness direction. In addition, 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] Fig.10 A schematic diagram of the sampling plate 3 is shown. Fig.11 Shows Fig.10A partial enlarged view of the part framed by frame E. Fig.10 and Fig.11 As shown, the sampling board 3 includes a circuit board 31 and a plurality of temperature sensors 32. Figure 8 and Fig. 9 As shown, the circuit board 31 is fixed to the side of the sampling board fixing part 12 facing away from the battery module 02. A plurality of temperature sensors 32 are respectively located in a plurality of channels 122 and contact a plurality of battery cells 021 in the battery module 02. The circuit board 31 of the sampling board 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 embodiment of the present disclosure is to set the sampling plate fixing part 12 of the insulating bracket 1 to include multiple channels 122, so that multiple temperature sensors 32 can pass through the multiple channels 122 respectively and contact the multiple 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 collection accuracy of the sampling plate 3 is relatively high. This makes the temperature obtained by the battery management unit 05 more accurate and timely, which is conducive to the battery management unit to perform temperature control protection on the battery cell 021, and improves the safety of the battery pack 001.

[0113] In addition, since the structural strength of the explosion-proof valve 0212 of the battery cell 021 is relatively low, the position of the channel 122 is set to be staggered with the explosion-proof valve 0212 of the battery cell 021, so that the temperature sensor 32 will not contact the explosion-proof valve 0212, thereby avoiding damage to the explosion-proof valve 0212 during the connection between the temperature sensor 32 and the battery cell 021.

[0114] In some examples, such as Figure 4 As shown, the portion of the battery cell 021 opposite to the channel 122 is provided with a slot 0213, and the slot 0213 is used to expose 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, which further improves the temperature sampling accuracy and timeliness of the temperature sensor 32. It is understandable that due to the low structural strength of the battery cell explosion-proof valve 0212, the slot 0213 cannot be provided at the battery cell explosion-proof valve 0212. Alternatively, it is difficult to provide the slot 0213 while ensuring that the battery cell explosion-proof valve 0212 is not damaged.

[0115] In some examples, the bottom of the slot 0213 is marked with an information code (such as a QR 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 set the slot 0213 on the battery cell 021, and mark the information code on the metal material at the bottom of the slot 0213 of the battery cell 021. That is, the technical solution provided by the embodiment of the present disclosure reuses the slot 0213 where the information code is located, so that there is no need to add a new slot 0213 on the battery cell 021, which reduces the processing difficulty of the battery cell 021 and reduces the cost.

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

[0117] The embodiment of the present disclosure does not limit the arrangement of the above-mentioned channels 122, openings 3111, temperature sensors 32 and slots 0213, as long as the arrangement of the channels 122, openings 3111, temperature sensors 32 and slots 0213 are the same.

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

[0119] In order to facilitate batch processing of the slots 0213, the positions of the slots 0213 in each battery cell 021 are the same, for example, the slots 0213 of each battery cell 021 are close to the negative pole. Assuming that the multiple battery cells 021 are in a series relationship, the poles 0211 of two adjacent battery cells 021 have opposite polarities, which makes the slots 0213 of the two adjacent battery cells 021 close to poles 0211 of different columns, and thus makes the two adjacent channels 122 close to different connection row fixing parts 11. Of course, assuming that the multiple battery cells 021 are not in a series relationship, the arrangement of the channels 122 will change adaptively following the arrangement of the slots 0213.

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

[0121] As mentioned above, after the explosion-proof valve 0212 of the battery cell 021 is opened, the smoke (which may be mixed with liquid) ejected from the explosion-proof valve 0212 is of high temperature and highly corrosive. If the smoke is allowed to diffuse at will, the smoke may corrode the pole 0211, the connecting bar 2 and the sampling plate 3, causing a short circuit in the battery module 02 and failure of the sampling plate 3, which may further aggravate the thermal runaway of the battery pack 001. In addition, since a channel 122 penetrating along the thickness direction is provided in the sampling plate fixing portion 12, it is also necessary to prevent the smoke from flowing through the channel 122 to the side of the integrated busbar 03 facing away from the battery module 02.

[0122] Fig.12 A schematic diagram showing the side of the integrated busbar 03 facing the battery module 02 is shown. Fig.13 Shows Fig.12 In order to make the smoke emitted by the battery cell explosion-proof valve 0212 controllable, in some examples, such as Fig.12 and Fig.13 As shown, the sampling plate fixing portion 12 includes a flue 121 on the side facing the battery module 02, and the flue 121 includes a bottom and two side walls. Fig.12 and Fig.13 The part outlined by the dotted line. Fig.14 A cross-sectional view of a battery pack is shown. Fig.15 Shows Fig.14 A local enlarged view of the portion framed by box H in FIG. Fig.16 FIG. 1 shows a schematic diagram of the interior of the flue 121 after the sampling plate fixing portion 12 is partially opened on one side facing away from the battery module 02. Figure 14-16 It can be seen that the flue 121 is buckled on a row of battery cells 021, and the bottom of the flue 121 faces the battery cell explosion-proof valve 0212 of a 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 a row of battery cells 021. In addition, the side wall of the flue 121 is located between the two connecting bar fixing parts 11, and the side wall of the flue 121 separates the flue 121 from the two connecting bar fixing parts 11, and further separates the flue 121 from the connecting bar 2 and the pole 0211.

[0123] like Fig.13 and Fig.16As shown, the bottom of the flue 121 is provided with openings of multiple channels 122. The side walls of the multiple channels 122 extend along the valve opening direction of the battery cell explosion-proof valve 0212, one end of the side walls of the multiple channels 122 is connected to the opening, and the other end is against the battery cell 021. The temperature sensor 32 passes through the channel 122 and contacts the battery cell 021, and the position of the channel 122 is staggered with the battery cell explosion-proof valve 0212. The side walls of the multiple channels 122 separate the temperature sensor 32 and the battery cell explosion-proof valve 0212.

[0124] According to the technical solution provided by the embodiment of the present disclosure, the smoke ejected from the explosion-proof valve 0212 of the battery cell will flow along the flue 121, and under the blocking effect of the two side walls of the flue 121, the smoke flowing into the flue 121 will not diffuse to the two sides of the flue 121, and will not corrode the poles 0211 and the connecting bars 2 on both sides of the flue 121, thereby 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 side wall of each channel 122 is connected to the opening and the other end is against the battery cell 021, the interior of the channel 122 is separated from the flue 121, so the smoke in the flue 121 will not be directly ejected through the channel 122 to the side of the integrated busbar 03 facing away from the battery module 02, and the smoke will not corrode the sampling plate 3 and the connecting bar 2, thereby reducing the risk of failure of the sampling plate 3 and the possibility of further deterioration of the thermal runaway of the battery pack 001.

[0125] In some examples, such as Fig.13 and Fig.16 As shown, the side walls of the channel 122, the side walls of the flue 121 and the top wall of the battery cell 021 form a receiving cavity, and the temperature sensor 32 is located in the receiving cavity. For example, the channel 122 includes three side walls, and the three side walls form an incomplete ring, and the gap of the ring is closed by the side walls of the flue 121 to separate the interior of the channel 122 from the interior of the flue 121.

[0126] In other examples, the side walls of the channel 122 and the top wall of the battery cell 021 form a receiving cavity. The temperature sensor 32 is located in the receiving cavity. For example, the channel 122 includes four side walls, which form a complete ring and separate the interior of the channel 122 from the interior of the flue 121.

[0127] In some examples, such as Fig.16 As shown, the temperature sensor 32 is located between the connection row 2 and the battery cell explosion-proof valve 0212 , and the height of the side wall of the channel 122 is higher than the battery cell explosion-proof valve 0212 and the temperature sensor 32 .

[0128] In some examples, such as Figure 2As shown, the battery pack 001 also includes a battery pack explosion-proof valve 04, which is arranged on the shell wall of the shell 01. In this way, the amount of smoke ejected by the battery cell explosion-proof valve 0212 of the battery cell 021 is relatively large, so that when the pressure inside the shell 01 is too high, the battery pack explosion-proof valve 04 will release pressure to prevent the battery pack 001 from exploding. Among them, the shell 01 is a sealed shell.

[0129] In some examples, such as Fig.14 and Fig.15 As shown, the insulating support 1 also includes a first side plate 13, and the first side plate 13 is 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 there is a gap 130 between the first side plate 13 and the battery module 02. The gap 130 is connected to the flue 121. In this way, the smoke in the flue 121 can flow out from the gap 130 and flow into the interior of the shell 01. Among them, exemplarily, the first side plate 13 is perpendicular to the main plate 10, and the first side plate 13 is arranged at intervals with the bottom wall of the shell 01. Of course, in other examples, the insulating support 1 may also not include the first side plate 13, and one end of the flue 121 is open. In this way, the smoke can flow out directly 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 toward 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 through the battery pack explosion-proof valve 04 more quickly, thereby 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, it is convenient for the first side plate 13 to guide the smoke toward the battery pack explosion-proof valve 04.

[0132] In some examples, such as Fig.12 and Fig.13 As shown, the sampling plate fixing portion 12 includes 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 battery cell explosion-proof valves 0212 of the battery module 02. The first grooves 123 are used to weaken the strength of the portion where they are located, so that in the later stage of thermal runaway, when the battery cell explosion-proof valve 0212 ejects too much smoke and the temperature is too high, the smoke ejected by the battery cell explosion-proof valve 0212 can break through the first grooves 123. In this way, the smoke ejected by the battery cell explosion-proof valve 0212 is conducive to the rapid diffusion of the smoke ejected by the battery cell explosion-proof valve 0212 inside 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 ejected from the battery cell explosion-proof valve 0212 is less and the temperature is lower, and the smoke ejected from the battery cell explosion-proof valve 0212 will not break through the first groove 123, and the smoke ejected from the battery cell explosion-proof valve 0212 still flows along the flue 121. That is, the first groove 123 is designed for the situation where the thermal runaway of the battery cell 021 is extremely serious.

[0134] In some examples, such as Fig.12 and Fig.13 As shown, the first groove 123 is an annular groove. Of course, in other examples, the first groove 123 can also be a rectangular groove, a circular groove, an elliptical groove, etc.

[0135] In addition, if Fig.12 and Fig.13 As shown, a plurality of fourth grooves 116 are provided on one side of the connection row fixing portion 11 facing the battery module 02, and the fourth grooves 116 are connected to the opening 112. The fourth grooves 116 are used to allow the poles 0211 of the power core 021 to extend therein, so as to preliminarily limit the poles 0211.

[0136] Fig.17 A schematic diagram of the connection bar 2 , the first pole output bar 4 , the second pole output bar 5 and the fuse 6 is shown. Fig.18 A schematic diagram showing the electrical connection relationship of multiple battery cells 021 is shown. Fig.18 As shown, under the electrical connection of the connecting bar 2, a plurality of battery cells 021 are connected in series in sequence.

[0137] In addition, in addition to the connection row 2, in order to facilitate the battery pack 001 to output power, such as Fig.17 As shown, the integrated busbar 03 also includes a first pole output bar 4 and a second pole output bar 5. One end of the first pole output bar 4 and the second pole output bar 5 are fixed to the connecting bar fixing portion 11, and are respectively used to be welded to a pole 0211. Under the action of the connecting bar 2, the first pole output bar 4 and the second pole output bar 5, the current path of the battery module 02 is as follows Fig.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] Fig.19 A schematic diagram of the second pole output row 5 is shown. In some examples, as Fig.19As shown, the second pole internal connection end 511 of the second pole output row 5 also includes a second groove 21, and the groove bottom of the second groove 21 is also provided with a positioning through hole 22. The positioning through hole 22 is used to be opposite to the position of the pole 0211 connected to the second pole internal connection end 511, so as to facilitate welding the second pole internal connection end 511 with the pole 0211. It should be noted that the functions of the second groove 21 and the positioning through hole 22 of the second pole internal connection end 511 are the same as those of the second groove 21 and the positioning through hole 22 on the connection row 2. The only difference is that two second grooves 21 and two positioning through holes 22 are provided on the connection row 2, while the second pole internal connection end 511 only needs to be welded with one pole 0211, so only one second groove 21 and one positioning through hole 22 are provided.

[0139] Fig. 20 A schematic diagram of the first pole output row 4 is shown. In some examples, as Fig. 20 As shown, the first pole internal connection end 4111 of the first pole output row 4 also includes a second groove 21, and the groove bottom of the second groove 21 is also provided with a positioning through hole 22. The positioning through hole 22 is used to be opposite to the position of the pole 0211 connected to the first pole internal connection end 4111, so as to facilitate welding the first pole internal connection end 4111 with the pole 0211. It should be noted that the functions of the second groove 21 and the positioning through hole 22 of the first pole internal connection end 4111 are the same as those of the second groove 21 and the positioning through hole 22 on the connection row 2. The only difference is that two second grooves 21 and two positioning through holes 22 are provided on the connection row 2, while the first pole internal connection end 4111 only needs to be welded with one pole 0211, so only one second groove 21 and one positioning through hole 22 are provided.

[0140] In some examples, such as Fig.19 As shown, the two side walls opposite to the second pole internal connection end 511 of the second pole output row 5 also include two bayonet holes 23. The portion of the connecting row fixing portion 11 corresponding to the second pole internal connection end 511 is also provided with a receiving groove 111, and two buckles 113 are also provided in the receiving groove 111, and the two buckles 113 are respectively engaged with the two bayonet holes 23 of the second pole internal connection end 511.

[0141] In some examples, such as Fig. 20 As shown, the two side walls opposite to the first pole internal connection end 4111 of the first pole output row 4 also include two bayonet holes 23. The portion of the connection row fixing portion 11 corresponding to the first pole internal connection end 4111 is also provided with a receiving groove 111, and two buckles 113 are also provided in the receiving groove 111, and the two buckles 113 are respectively engaged with the two bayonet holes 23 of the first pole internal connection end 4111.

[0142] In some examples, such as Figure 5As shown, the insulating bracket 1 also includes a second side plate 14, and the second side plate 14 is connected to one end of the main plate 10. The second side plate 14 is bent relative to the main plate 10 toward the battery module 02. In an exemplary embodiment, the second side plate 14 is perpendicular to the main plate 10 and is arranged opposite to the first side plate 13.

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

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

[0145] like Fig. 20 As shown, the first pole output row 4 includes a first section 411, a second section 412 and a third section 413 connected in sequence. Figure 5 As shown, the insulating bracket 1 also includes a third side plate 15, which is connected to one side of the main plate 10 and is located between the first side plate 13 and the second side plate 14. The first section 411 is fixedly connected to the first side plate 13, the second section 412 is fixedly connected to the third side plate 15, and the third section 413 is fixedly connected to the second side plate 14. In an exemplary embodiment, the third side plate 15 is perpendicular to the main plate 10.

[0146] Fig.21 Shows Figure 5 A partial enlarged view of the portion framed by box B in FIG. Fig. 22 Shows Figure 5 A partial enlarged view of the portion framed by box C in FIG. In some examples, such as Figure 5 , Fig.21 and Fig. 22 As shown, 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 section 411 extends into the first limiting groove 131, and the second section 412 extends into the second limiting groove 151. In this way, the first side plate 13 and the third side plate 15 can separate the first pole output row 4 from the side wall of the battery module 02, and can also separate the first pole output row 4 from the housing 01.

[0147] In some examples, such as Fig.19 and Fig. 20As shown, the integrated busbar 03 also includes an insulating sleeve 7, which surrounds the first pole output row 4 and / or the second pole output row 5. In this way, the insulating sleeve 7 separates the first pole output row 4 and the second pole output row 5 from the battery module 02, thereby preventing arc ignition from occurring between the first pole output row 4 and the second pole output row 5 and the battery module 02. At the same time, the insulating sleeve 7 also separates the first pole output row 4 and the second pole output row 5 from the housing 01, thereby preventing the risk of electric shock. The material of the insulating sleeve 7 includes a ceramic composite material.

[0148] Next, the implementation of the first pole output row 4 and the second pole output row 5 will be described.

[0149] In some examples, the second output row 5 is a negative output row. Fig.19 As shown, the second electrode output row 5 includes a negative electrode aluminum sheet 51 and a first negative electrode copper sheet 52, and the negative electrode aluminum sheet 51 is connected in series with the first negative electrode copper sheet 52. In an exemplary embodiment, the insulating sleeve 7 surrounds the negative electrode aluminum sheet 51.

[0150] In some examples, such as Fig. 20 As shown, the first pole output row 4 includes a positive aluminum sheet 41 and a positive copper sheet 42, and the positive aluminum sheet 41 and the positive copper sheet 42 are connected in series. Wherein, illustratively, the positive aluminum sheet 41 includes the above-mentioned first section 411, the second section 412 and the third section 413. The positive copper sheet 42 is fixed to the third section 413. The insulating sleeve 7 surrounds the positive aluminum sheet 41, for example, the first section 411 and the second section 412 of the positive aluminum sheet 41.

[0151] Fig.23 Shows Fig.17 A partial enlarged view of the portion framed by box I in FIG. Fig.17 and Fig.23 As shown, the integrated busbar 03 also includes a fuse 6, which is connected in series with the first pole output bar 4 or the second pole output bar 5. In this way, when the battery module 02 is short-circuited so that the current of the first pole output bar 4 and the second pole output bar 5 is too large, the fuse 6 will melt to achieve short-circuit protection.

[0152] In some examples, such as Figure 5 As shown, the fuse 6 is fixed to the side of the second side plate 14 facing away from the battery module 02 .

[0153] In some examples, such as Fig.16 and Fig.23 As shown, the second pole output row 5 further includes a second negative copper sheet 53 , and two ends of the fuse 6 are electrically connected to the first negative copper sheet 52 and the second negative copper sheet 53 , respectively.

[0154] In some examples, such as Figure 5As shown, the integrated busbar 03 further includes a fuse cover plate 16 , which is buckled onto the second side plate 14 and covers the fuse 6 .

[0155] In some examples, such as Fig.10 As shown, the circuit board 31 includes a first board body 311 and a second board body 312. Figure 5 As shown, the first plate 311 is fixed to the sampling plate fixing portion 12, a portion of the second plate 312 is fixed to the second side plate 14, and a data output connector 34 is provided on the second plate 312. 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. Fig. 9 As shown, a positioning pin 124 is provided on the side of the sampling plate fixing portion 12 facing away from the battery module 02. Fig.11 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 achieve the positioning of the first plate body 311 .

[0156] Fig.24 Shows Fig.10 A partial enlarged view of the portion framed by the dashed box F in FIG. Fig.24 As shown, the sampling board 3 further includes an OT terminal connector 35, and the OT terminal connector 35 is electrically connected to the data output connector 34. Fig.23 As shown, the integrated busbar 03 also includes an OT terminal 8 (or a circular cold-pressed terminal), which is provided at the first pole output row 4 and / or the second pole output row 5, and the OT terminal 8 is electrically connected to the OT terminal connector 35. Among them, the OT terminal 8 includes an OT temperature terminal 81 and an OT voltage terminal 82. The OT temperature 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 provided inside the column structure of the OT temperature terminal 81. The OT voltage terminal 82 is used to collect the voltage of the first pole output row 4 and / or the second pole output row 5.

[0157] In some examples, such as Fig.23 As shown, the OT terminal 8 includes three OT temperature terminals 81 and one OT voltage terminal 82. The three OT temperature 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 terminal 82 is fixed to the second negative copper sheet 53. Of course, the OT voltage 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 reinforcement plate is provided between the second plate body 312 and the second side plate 14 . The reinforcement plate may be a PCB board to improve the stability of the fixation of the OT terminal connector 35 .

[0159] In some examples, such as Figure 5 As shown, the integrated busbar 03 further includes a first insulating sheet 9, which is 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 row 5, and the output end of the first pole output row 4, to prevent arcing sparks from being transmitted to the battery module 02, causing a short circuit in the battery module 02. The material of the first insulating sheet 9 may include a ceramic composite material, and the first insulating sheet 9 may also be called a first ceramic composite tape.

[0160] The following is an exemplary description of the implementation of the housing 01.

[0161] In some examples, such as Figure 3 As shown, the housing 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 to the second side plate 14 is provided with a port 0111, and the end cover assembly 013 closes the port 0111. The end cover assembly 013 includes a receiving cavity. The battery pack 001 also includes a battery management unit 05, and the data output connector 34 of the battery management unit 05 and the sampling board 3 are located in the receiving cavity and are electrically connected. Thus, the data output connector 34 can send the collected data to the battery management unit 05.

[0162] Fig.25 An exploded view of the end cap assembly 013 is shown. Fig.25 As shown, 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, which 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 to the first end plate 0131, and a receiving cavity is enclosed between the cover plate 0132 and the first end plate 0131. Fig.26 and Fig. 27 The schematic diagram shows the relative positions of the partition plate 0133 and the first end plate 0131, as shown in FIG. Fig.26 and Fig. 27 As shown, the partition 0133 is located in the accommodating cavity. The partition 0133 closes a portion of the connector through hole 01311, and a gap 01310 is formed between the partition 0133 and the hole wall of the connector through hole 01311. Fig.28 As shown, the plate body of the sampling plate 3 passes through the slit 01310. The battery management unit 05 is fixed to the side of the partition plate 0133 facing away from the first end plate 0131.

[0163] The size of the connector through hole 01311 is larger 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 to the battery management unit 05. After the data output connector 34 passes through the connector through hole 01311, the bulkhead 0133 is used to close most of the connector through hole 01311, leaving only the gap 01310 for the second plate 312 to pass through.

[0164] In the technical solution provided by the embodiment of the present disclosure, a first end plate 0131 and a partition 0133 are provided between the battery management unit 05 and the battery module 02, and the first end plate 0131 and the partition 0133 separate the battery management unit 05 and the battery module 02, thereby preventing the spark of the battery management unit 05 from being transmitted to the battery module 02 and causing damage to the battery module 02. In addition, by providing the partition 0133, most of the connector through-hole 01311 on the first end plate 0131 is closed, and only the gap 01310 for the second plate 312 to pass through is retained, thereby improving the isolation effect of the partition 0133 and the first end plate 0131.

[0165] Fig.30 An exploded view of the cover component 022 of the battery module 02 is shown. Fig.30 As shown, the battery module 02 also includes a coating component 022, and the coating component 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 receiving cavity, and a plurality of battery cells 021 are located in the receiving 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 may include a ceramic composite material, and the insulating sheet 0220 may also be called a ceramic composite tape.

[0166] In some examples, such as Fig.29 and Fig.30 As shown, the covering component 022 further includes a tightening band 0224, which tightens the bottom plate 0221, the two second end plates 0223 and the two side plates 0222 on the plurality of battery cells 021. Fig.29 and Fig.30 As shown, there are two tightening bands 0224 , and the two tightening bands 0224 are arranged along the height direction of the battery module 02 .

[0167] In some examples, such as Fig.30 As shown, the battery module 02 further includes a plurality of flexible spacers 0225 , each of which is disposed between two adjacent battery cells 021 .

[0168] In some examples, such as Figure 3As shown, the battery pack 001 further includes a second insulating sheet 07, which covers the side of the battery module 02 facing 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 housing 01, reducing the risk of electric shock to the user. The material of the second insulating sheet 07 may include a ceramic composite material, and the second insulating sheet 07 may also be called a second ceramic composite tape.

[0169] The following is an exemplary description of the assembly steps of the integrated busbar 03.

[0170] First, attach the first insulating sheet 9 to the side of the second side plate 14 of the insulating bracket 1 facing the battery module 02 .

[0171] Second, assemble the positive copper sheet 42 on the positive aluminum sheet 41 by screws. Wrap the insulating sleeve 7 on the positive aluminum sheet 41. Insert the assembled first-pole output row 4 into the first limiting groove 131 of the first side plate 13 of the insulating bracket 1 and the second limiting groove 151 of the third side plate 15.

[0172] Third, each connection bar 2 is placed in the multiple receiving grooves 111 of the two connection bar fixing parts 11 respectively.

[0173] Fourth, the first negative copper sheet 52 is assembled on the side of the second side plate 14 of the insulating bracket 1 facing 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 bracket 1.

[0174] Fifth, assemble the sampling plate 3 into place through the pin hole 3113 and the positioning pin 124 on the sampling plate fixing part 12 , and weld the nickel sheet 33 to the connecting row 2 , the first pole output row 4 and the second pole output row 5 .

[0175] Sixth, connect the fuse 6 in series with the first negative copper sheet 52 , connect the second negative copper sheet 53 in series with the fuse 6 , and then buckle the fuse cover 16 .

[0176] In summary, the battery pack 001 provided in the embodiment of the present disclosure integrates temperature detection design, voltage detection design, directional smoke exhaust design, high temperature insulation design, connection row variable cross-section design (i.e., the setting of the second groove 21) and short circuit protection design. The battery pack 001 provided in the embodiment of the present disclosure achieves multiple safety, and ensures the safety of the battery pack 001 in various stages such as 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 present disclosure also provides a battery cabinet. Fig.31As shown, the battery cabinet includes 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. The plurality of battery packs 001 may be connected in series or in parallel.

[0178] like Fig.31 and Fig.32 As shown, the battery cabinet includes a connector 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 to achieve series or parallel connection of different battery packs 001.

[0179] Fig.33 Shows Fig.31 A partial enlarged view of the portion framed by box J in FIG. Fig.33 As shown, the battery pack explosion-proof valves 04 of multiple battery packs 001 are all connected to the cabinet flue 0021 of the cabinet 002. In this way, the smoke ejected from the battery pack explosion-proof valves 04 of the battery pack 001 flows into the cabinet flue 0021 for directional smoke exhaust, and will not spread randomly, thereby improving the safety of the battery cabinet.

[0180] The terms used in the implementation mode 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 implementation mode of the present disclosure should be the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A battery pack, characterized in that: The battery pack comprises 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) comprises at least one row of battery cells (021), and each row of battery cells (021) comprises a plurality of battery cells (021); The integrated busbar (03) comprises an insulating support (1), a connecting bar (2) and a sampling plate (3); in the valve opening direction of the battery cell explosion-proof valve (0212) of the battery cell (021), the insulating support (1) is arranged on the battery module (02), the sampling plate (3) and the connecting bar (2) are arranged on the insulating support (1), and the connecting bar (2) is used to electrically connect the at least one column of battery cells (021); The insulating support (1) comprises a flue (121) and a plurality of channels (122), the flue (121) comprising a groove bottom and two side walls, the flue (121) is buckled on a row of battery cells (021), the groove bottom faces the battery cell explosion-proof valve (0212) of the row of battery cells (021), and the two side walls are located on both sides of the battery cell explosion-proof valve (0212) of the row of battery cells (021); The flue (121) has openings of the multiple channels (122) at the bottom thereof, the side walls of the multiple channels (122) extending along the valve opening direction of the battery cell explosion-proof valve (0212), one end of the side walls of the multiple channels (122) connected to the opening, and the other end of the side walls of the multiple channels (122) connected to the battery cell (021); A temperature sensor (32) electrically connected to the sampling plate (3) passes through the channel (122) and contacts the battery cell (021); the position of the channel (122) is staggered with the battery cell explosion-proof valve (0212); and the side walls of the multiple channels (122) separate the temperature sensor (32) and the battery cell explosion-proof valve (0212).

2. The battery pack according to claim 1, characterized in that: The side wall of the channel (122), the side wall of the flue (121) and the top wall of the battery cell (021) form a receiving cavity, and the temperature sensor (32) is located in the receiving cavity.

3. The battery pack according to claim 1, characterized in that: The side wall of the channel (122) and the top wall of the battery cell (021) form a receiving cavity, and the temperature sensor (32) is located in the receiving cavity.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The temperature sensor (32) is located between the connection row (2) and the battery cell explosion-proof valve (0212), and the height of the side wall of the channel (122) is higher than the battery cell explosion-proof valve (0212) and the temperature sensor (32).

5. The battery pack according to any one of claims 1 to 4, characterized in that: The insulating support (1) comprises a main body plate (10), the main body plate (10) comprises 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 respectively used to fix the connecting row (2), the sampling plate fixing part (12) is used to fix the sampling plate (3), and the flue (121) and the channel (122) are arranged on the sampling plate fixing part (12); The insulating bracket (1) comprises a first side plate (13), the first side plate (13) being connected to one end of the sampling plate fixing portion (12), the first side plate (13) extending along the height direction of the battery module (02), and having a gap (130) between the first side plate (13) and the side wall of the battery module (02), the gap (130) being connected to the flue (121).

6. The battery pack according to claim 5, characterized in that: The battery pack (001) further comprises a battery pack explosion-proof valve (04), wherein the battery pack explosion-proof valve (04) is arranged on a shell wall of the shell (01) opposite to the first side plate (13).

7. The battery pack according to claim 5 or 6, characterized in that: The bottom of the flue (121) comprises a plurality of first grooves (124), and the plurality of first grooves (124) are respectively arranged opposite to a plurality of battery cell explosion-proof valves (0212) of the battery module (02).

8. The battery pack according to any one of claims 5 to 7, characterized in that: Each of the connection rows (21) comprises two second grooves (21), the groove bottoms of the two second grooves (21) each having a positioning through hole (22), and the two positioning through holes (22) are respectively opposite to the two poles (0211) connected to the connection row (21).

9. The battery pack according to any one of claims 5 to 7, characterized in that: The side of the connection bar fixing portion (11) facing away from the battery module (02) comprises a plurality of accommodating grooves (111), the bottom of each accommodating groove (111) having two openings (112), and the two poles (0211) of the battery module (02) respectively pass through the two openings (112); Each of the connection bars (21) is located in one of the accommodating grooves (111) and is welded to the two poles (0211).

10. The battery pack according to claim 9, characterized in that: Two opposite side walls of each accommodating groove (111) are provided with buckles (113), and two opposite side walls of each connecting row (21) are provided with bayonet holes (23), and the two buckles (113) are respectively located in the two bayonet holes (23).

11. The battery pack according to claim 9 or 10, characterized in that: The height of the side wall of the containing groove (111) is higher than the height of the connecting row (21).

12. The battery pack according to any one of claims 5 to 11, characterized in that: The insulating bracket (1) further comprises a second side plate (14), wherein the second side plate (14) is connected to one end of the main plate (10) and is arranged opposite to the first side plate (13); The integrated busbar (03) further comprises a first pole output bar (4) and a second pole output bar (5), one end of the first pole output bar (4) being fixed to an end of the connection bar fixing portion (11) away from the second side plate (14), and being electrically connected to a pole (0211) of a battery cell (021) away from the second side plate (14), and one end of the second pole output bar (5) being fixed to an end of the connection bar fixing portion (11) close to the second side plate (14), and being electrically connected to a pole (0211) of a battery cell (021) close to 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), wherein 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.

13. The battery pack according to claim 12, characterized in that: The insulating support (1) further comprises a third side plate (15), wherein the third side plate (15) is connected to one side of the main 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) comprises a first section (411), a second section (412) and a third section (413) which are 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).

14. The battery pack according to claim 12 or 13, characterized in that: The integrated busbar (03) further comprises a fuse (6), wherein the fuse (6) is connected in series with the first-pole output bar (4) or the second-pole output bar (5), and the fuse (6) is fixed to a side of the second side plate (14) facing away from the battery module (02).

15. The battery pack according to any one of claims 12 to 14, characterized in that: The integrated busbar (03) further comprises at least one insulating sleeve (7), wherein the at least one insulating sleeve (7) surrounds the first-pole output bar (4) and / or the second-pole output bar (5).

16. The battery pack according to any one of claims 12 to 15, characterized in that: The circuit board (31) comprises a first board body (311) and a second board body (312), the first board body (311) is fixed to the sampling board fixing portion (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) further comprises a data output connector (34), wherein the data output connector (34) is fixed to an end of the second board body (312) away from the first board body (311).

17. The battery pack according to claim 16, characterized in that: The sampling board (3) further comprises an OT terminal connector (35), wherein the OT terminal connector (35) is fixed to the second board body (312) and is electrically connected to the data output connector (34); The integrated busbar (03) further comprises at least one OT terminal (8), wherein the at least one OT terminal (8) is provided on the first-pole output row (4) and / or the second-pole output row (5), and the at least one OT terminal (8) is electrically connected to the OT terminal connector (35).

18. The battery pack according to claim 16 or 17, characterized in that: The housing (01) comprises a bottom shell (011), a top cover (012) and an end cover assembly (013); a portion of the bottom shell (011) or the top cover (012) opposite to the second side plate (14) is provided with a port (0111); the end cover assembly (013) closes the port (0111); and the end cover assembly (013) comprises a receiving cavity; The battery pack (001) further comprises a battery management unit (05); the battery management unit (05) and the data output connector (34) are located in the accommodating cavity and are electrically connected.

19. The battery pack according to claim 18, characterized in that: The end cover assembly (013) comprises 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), and the connector through-hole (01311) is used for the data output connector (34) to pass through; The cover plate (0132) and the first end plate (0131) enclose the accommodating cavity, the partition plate (0133) is located in the accommodating cavity and closes a portion of the connector through hole (01311), and a gap (01310) is provided between the partition plate (0133) and the hole wall of the connector through hole (01311); The second plate body (312) passes through the gap (01310), and the battery management unit (05) is fixed to a side of the partition (0133) facing away from the first end plate (0131).

20. The battery pack according to any one of claims 12 to 19, characterized in that: The integrated busbar (03) further comprises a first insulating sheet (9), wherein the first insulating sheet (9) is attached to a side of the second side plate (14) facing the battery module (02).

21. A battery cabinet, characterized in that: The battery cabinet comprises a cabinet body (002) and a plurality of battery packs (001) according to any one of claims 1 to 20, wherein the plurality of battery packs (001) are electrically connected and are located inside the cabinet body (002); The battery pack (001) comprises a battery pack explosion-proof valve (04), and the battery pack explosion-proof valves (04) of the plurality of battery packs (001) are all connected to the cabinet flue (0021) of the cabinet (002).

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