Battery pack, battery device and electric equipment

Abstract

The utility model relates to a battery pack, a battery device and electric equipment, the battery pack comprises a plurality of batteries which are sequentially arranged along a first direction, each battery comprises a shell, a battery cell and two pole assemblies, and the battery cell is located in the shell of the battery; each pole assembly is used for conducting the battery cell, the two pole assemblies are arranged on the two sides of the battery cell in the second direction, the second direction intersects with the first direction, the two pole assemblies extend oppositely and extend out of the shell, and the pole assemblies, located on the same side in the second direction, of the batteries are sequentially conducted. According to the battery pack, charging and discharging of the battery are achieved through the two pole assemblies arranged on the two sides, the conduction path of current can be reduced through the pole assemblies located on the two sides, the passing current is reduced, then heat generated by the battery is reduced, and the charging and discharging capacity of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of battery packs, and particularly to a battery pack, a battery device, and an electrical device. Background Art

[0002] The battery pack is electrically connected to the electrical device to supply power to the electrical device.

[0003] In the existing battery pack, the current-carrying area of the tab and the terminal is small, resulting in high heat generation, a long current conduction path, and a limited allowable current magnitude, which limits the charge and discharge capabilities of the battery pack. Summary of the Utility Model

[0004] In view of the above technical problems, the purpose of this application is to provide a battery pack with strong charge and discharge capabilities, a battery device including the above battery pack, and an electrical device including the above battery pack or the above battery device. Specifically, the technical solutions are as follows:

[0005] In a first aspect, an embodiment of this application provides a battery pack, including a plurality of batteries arranged in sequence along a first direction. Each battery includes a housing, an electric core, and two terminal assemblies. The electric core is located inside the housing of the battery; each terminal assembly is used to conduct electricity to the electric core. Along a second direction, the two terminal assemblies are arranged on both sides of two electric cores respectively. The second direction intersects the first direction. The two terminal assemblies extend away from each other and respectively extend out of the housing. The terminal assemblies on the same side of each battery along the second direction are electrically connected in sequence.

[0006] The battery of the battery pack of this application is provided with two terminal assemblies, and the two terminal assemblies conduct electricity to the electric core, enabling the two terminal assemblies to independently charge and discharge, and thus realizing the power supply to the electrical device.

[0007] The battery pack of this application realizes the charge and discharge of the battery through two terminal assemblies arranged on both sides. The terminal assemblies on both sides can reduce the current conduction path, reduce the passing current, and thus reduce the heat generated by the battery and improve the charge and discharge capabilities of the battery.

[0008] In one embodiment, each terminal assembly includes a first terminal and a second terminal spaced apart from each other. The battery pack includes an electrical connection member. The first terminal of one battery among adjacent two batteries is electrically connected to the second terminal of the other battery through the electrical connection member.

[0009] In this embodiment, each terminal assembly includes a first terminal and a second terminal. The electrical connection member connects the first terminal and the second terminal of adjacent two batteries, enabling the adjacent two batteries to be electrically connected, and further enabling the plurality of batteries in the battery pack to be electrically connected, thereby increasing the capacity of the battery pack.

[0010] In one embodiment, the first pole column of one of two adjacent batteries is aligned with the second pole column of the other battery along a first direction, where: one end of an electrical connection member is electrically connected to the first pole column of one battery, and the other end extends along the first direction and is electrically connected to the second pole column of the other battery.

[0011] In this embodiment, aligning the first pole columns and the second pole columns of the two batteries can reduce the distance between the first pole column and the second pole column, thereby reducing the size of the electrical connection member.

[0012] In one embodiment, the first pole column of one of two adjacent batteries is aligned with the first pole column of the other battery along a first direction, where: one end of an electrical connection member is electrically connected to the first pole column of one battery, and the other end extends toward the second pole column of the other battery and is electrically connected to the second pole column of the other battery.

[0013] In one embodiment, pole ear assemblies are respectively provided at both ends of each battery cell along a second direction. The pole ear assemblies include a first pole ear and a second pole ear. The first pole ear and the second pole ear are spaced apart from each other. The first pole ear is connected between the battery cell and the first pole column, and the second pole ear is connected between the battery cell and the second pole column. The battery cell is electrically connected to the first pole column and the second pole column through the first pole ear and the second pole ear respectively.

[0014] In this embodiment, the battery cell is electrically connected to the first pole column and the second pole column through the first pole ear and the second pole ear respectively. The first pole column and the second pole column can be used as the positive electrode and the negative electrode to be electrically connected to an electrical device, thereby realizing the electrical connection between the battery cell and the electrical device.

[0015] In one embodiment, the battery pack includes a first lead-out member and a second lead-out member. Along the first direction, the first lead-out member and the second lead-out member are arranged on both sides of a plurality of batteries. One of the two batteries at both ends of the plurality of batteries along the first direction has its first pole column electrically connected to the first lead-out member, and the second pole column of the other battery is electrically connected to the second lead-out member.

[0016] In this embodiment, along the first direction, the first lead-out member of the battery pack is located on one side of the plurality of batteries. The first lead-out member is electrically connected to the first pole column of the nearest battery. The second lead-out member is located on the other side of the plurality of batteries. The second lead-out member is electrically connected to the second pole column of the nearest battery, so that the first lead-out member and the second lead-out member respectively serve as the positive electrode and the negative electrode of the battery pack for electrical connection to an electrical device.

[0017] In one embodiment, the first lead-out member includes two first connection members. One ends of the two first connection members are fixedly connected to form a first lead-out portion, and the other ends of the two first connection members are respectively electrically connected to two first pole columns on both sides of the battery.

[0018] In one embodiment, the second lead-out member includes two second connecting members. One ends of the two second connecting members are fixedly connected to form a second lead-out portion, and the other ends of the two second connecting members are respectively electrically connected to two second pole columns on both sides of the battery.

[0019] In one embodiment, along the second direction, the first lead-out portion and the second lead-out portion are located on the same side of the battery pack, and the first lead-out portion and the second lead-out portion extend in opposite directions.

[0020] In one embodiment, the battery pack includes a monitoring module. The monitoring module is located at one end of the battery pack along the second direction, and the monitoring module is used to monitor the voltage of the pole column assembly on one side of a battery along the second direction.

[0021] In this embodiment, the monitoring module monitors the voltages of the pole column assemblies on both sides of the battery respectively, avoiding excessive current in a single battery and causing damage to other batteries, thereby ensuring the normal operation of the battery pack and the electrical equipment.

[0022] In a second aspect, the present application further provides a battery device, including a housing and the above-mentioned battery pack. The housing includes an inner cavity, and the battery pack is disposed in the inner cavity.

[0023] In a third aspect, the present application further provides an electrical equipment, including the above-mentioned battery pack, and the battery pack is used for supplying power to the electrical equipment; or including the above-mentioned battery device, and the battery device is used for supplying power to the electrical equipment.

[0024] It can be understood that for the battery device and the electrical equipment of the present application, because the above-mentioned battery pack is adopted, the battery pack has higher charge and discharge capabilities and lower heat generation efficiency, thereby improving the energy utilization rate of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a battery pack from a perspective provided in an embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of the battery pack from another perspective provided in an embodiment of the present application;

[0027] Figure 3 is a schematic internal structure diagram of a battery provided in an embodiment of the present application;

[0028] Figure 4 is a schematic partial internal structure diagram of a battery provided in an embodiment of the present application;

[0029] Figure 5 is a schematic structural diagram of a battery from a perspective provided in an embodiment of the present application;

[0030] Figure 6Schematic diagram of the structure of a battery from another perspective provided in an embodiment of the present application;

[0031] Figure 7 Partial schematic diagram of the structure of a battery from one perspective provided in an embodiment of the present application;

[0032] Figure 8 Partial schematic diagram of the structure of a battery from another perspective provided in an embodiment of the present application;

[0033] Figure 9 Schematic diagram of the structure of a battery pack provided in another embodiment of the present application;

[0034] Figure 10 Exploded schematic diagram of the battery pack provided in another embodiment of the present application;

[0035] Figure 11 Exploded schematic diagram of the battery pack from one perspective provided in an embodiment of the present application;

[0036] Figure 12 Exploded schematic diagram of the battery pack from another perspective provided in an embodiment of the present application. Detailed implementation manners

[0037] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0038] The descriptions of the following embodiments refer to the attached drawings to illustrate specific embodiments in which the present application can be implemented. The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in the present application, unless otherwise specified, both include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0039] The present application provides a battery device, which includes a housing and a battery pack. The housing includes an inner cavity, and the battery pack is disposed in the inner cavity.

[0040] Please refer toFigures 1 - 4 , wherein, Figure 1 shows a schematic structural diagram of a battery pack 100 from a perspective provided in an embodiment of the present application; Figure 2 shows a schematic structural diagram of the battery pack 100 from another perspective provided in an embodiment of the present application; Figure 3 shows a schematic internal structure diagram of the battery 10 provided in an embodiment of the present application; Figure 4 shows a partial internal structure diagram of the battery 10 provided in an embodiment of the present application.

[0041] The battery pack 100 of the present application includes a plurality of batteries 10 arranged in sequence along a first direction 001. Each battery 10 includes a housing 11, an electric core 15, and two pole column assemblies 12. The electric core 15 is located inside the housing of the battery 10.

[0042] Specifically, in one embodiment, as Figure 1 and Figure 2 shown, the battery pack 100 is provided with a plurality of batteries 10 arranged in sequence along the first direction 001. A second direction 002 is parallel to the length direction of the battery 10, and the first direction 001 is perpendicular to the second direction 002. Please refer to Figure 3 shown, the battery pack 100 includes an electric core 15, and the electric core 15 is located inside the housing 11.

[0043] Each pole column assembly 12 of the battery pack 100 of the present application is used to conduct the electric core 15. Along the second direction 002, the two pole column assemblies 12 are respectively arranged on both sides of the electric core 15.

[0044] Specifically, in one embodiment, as Figure 3 and Figure 4 shown, the battery pack 100 includes two pole column assemblies 12, namely a first pole column assembly 12a and a second pole column assembly 12b. The first pole column assembly 12a and the second pole column assembly 12b are fixed on both sides of the housing 11 along the second direction 002. The first pole column assembly 12a and the second pole column assembly 12b are respectively in conduction with the electric core 15. Each pole column assembly 12 includes a first pole column 121 and a second pole column 122, and the first pole column 121 and the second pole column 122 are spaced apart from each other.

[0045] The two pole column assemblies 12 of the battery pack 100 of the present application extend away from each other and respectively protrude out of the housing 11. The pole column assemblies 12 on the same side of each battery 10 along the second direction 002 are sequentially in conduction.

[0046] Specifically, in one embodiment, one end of the first pole column assembly 12a extends towards the side away from the electric core 15 and passes through the housing 11 to protrude out of the outside of the housing 11. One end of the second pole column assembly 12b extends towards the side away from the electric core 15 and passes through the housing 11 to protrude out of the outside of the housing 11.

[0047] In this embodiment, the first pole assemblies 12a of multiple batteries 10 are located on one side of the housing 11, and the first pole assemblies 12a of multiple batteries 10 are conductively connected in sequence. The second pole assemblies 12b of multiple batteries 10 are located on the other side of the housing 11, and the second pole assemblies 12b of multiple batteries are conductively connected in sequence.

[0048] Each battery 10 of the battery pack 100 of the present application is provided with an electric core 15 and two pole assemblies 12. The electric core 15 is conductively connected to the pole assembly 12, and the pole assembly 12 can be electrically connected to an electrical device, so that the electric core 15 is conductively connected to the electrical device, thereby realizing the power supply of the battery pack 100 to the electrical device.

[0049] Each battery 10 of the battery pack 100 of the present application is provided with two pole assemblies 12 and an electric core 15. Compared with the battery structure with one pole assembly 12 and an electric core 15, the charging and discharging capacity of the battery 10 of the present application is stronger, which can improve the output power of the battery 10 and reduce the charging time of the battery 10.

[0050] In the battery of the battery pack in the prior art, the positive and negative electrodes of the pole assembly are respectively arranged on both sides of the housing. The conduction path length of the current from the positive electrode through the electric core to the negative electrode is the size of the battery housing, and the current of the battery is large. The battery heating caused by the current is serious, which easily leads to overheating of the battery pack.

[0051] The pole assemblies 12 in the battery 10 of the battery pack 100 of the present application are located on opposite sides. The conduction path length of the current from the positive electrode through the electric core 15 to the negative electrode is less than the size of the housing 11 of the battery 10, which can reduce the conduction path of the current and further improve the charging and discharging capacity of the battery 10.

[0052] At the same time, the current of the battery 10 of the battery pack 100 of the present application is conducted by two pole assemblies 12 and an electric core 15. The same amount of current is shunted through the lines of two relatively independent pole assemblies 12 and the electric core 15, so that the current passing through each pole assembly 12 and the electric core 15 is small, and the heating efficiency of the battery 10 caused by the current is also low, thereby reducing the heating of the battery pack 100.

[0053] The batteries 10 of the battery pack 100 of the present application are arranged in sequence along the first direction 001, and the two pole assemblies 12 are arranged along the second direction 002 intersecting the first direction 001, so that the two pole assemblies 12 are not located between two batteries 10. Compared with arranging the poles between two batteries 10, there is more space on both sides of the housing 11 along the second direction 002 to facilitate the electrical connection between the electrical device and the pole assembly 12.

[0054] In addition, the length direction of the battery 10 is parallel to the second direction 002, which can reduce the length of the conduction path of the current from the positive electrode through the battery cell to the negative electrode, thereby reducing the heat generation efficiency of the battery 10 and the battery pack 100.

[0055] The present application also provides an electrical device, including the above-mentioned battery pack 100 for supplying power to the electrical device; or including the above-mentioned battery device for supplying power to the electrical device.

[0056] It should be noted that the battery pack 100 of the present application can not only be applied to an electrical device or a battery device to supply power to the electrical device, but also be applicable to other systems or devices that need to perform charge and discharge, and has stronger charge and discharge capabilities and lower heat generation efficiency.

[0057] In addition, the battery 10 of the present application can not only be applied to the battery pack 100, but a single battery 10 can also be applied to an electrical device or other systems or devices that need to perform charge and discharge, and can also have stronger charge and discharge capabilities and lower heat generation efficiency.

[0058] Please refer to Figures 5 - 8 , in which Figure 5 schematically shows a structural diagram of the battery 10 from one perspective provided in an embodiment of the present application; Figure 6 schematically shows a structural diagram of the battery 10 from another perspective provided in an embodiment of the present application; Figure 7 schematically shows a partial structural diagram of the battery 10 from one perspective provided in an embodiment of the present application; Figure 8 schematically shows a partial structural diagram of the battery 10 from another perspective provided in an embodiment of the present application.

[0059] In one embodiment, the pole assembly 12 includes a first pole 121 and a second pole 122 spaced apart from each other, and the battery pack 100 includes an electrical connection member 20. The first pole 121 of one battery 10 among two adjacent batteries 10 is electrically connected to the second pole 122 of the other battery 10 through the electrical connection member 20.

[0060] In one embodiment, as Figure 5 and Figure 6 shown, the first pole assembly 12a includes two poles, namely the first pole of the first pole assembly 121a and the second pole of the first pole assembly 122a, and the second pole assembly 12b includes two poles, namely the first pole of the second pole assembly 121b and the second pole of the second pole assembly 122b.

[0061] It can be understood that the two poles in the first pole assembly 12a can serve as the positive pole and the negative pole respectively, and the two poles in the second pole assembly 12b can serve as the positive pole and the negative pole respectively, so as to realize the sequential conduction of adjacent batteries 10.

[0062] In one embodiment, the housing 11 is provided with a first surface and a second surface facing the adjacent battery 10, wherein along the first direction 001, the first surface and the second surface are respectively located on both sides of the housing 11. One end of the first pole 121 is electrically connected to the battery cell 15, and the other end can pass through the first surface to extend out of the housing 11 and continue to extend towards the adjacent battery 10; one end of the second pole 122 is electrically connected to the battery cell 15, and the other end can also pass through the second surface to extend out of the housing 11 and continue to extend towards the adjacent battery 10. This embodiment can reduce the size of the electrical connection member 20, thereby reducing the loss when the current passes through the electrical connection member 20.

[0063] In another embodiment, the first pole 121 passing through the first surface is in contact with the second pole 122 passing through the second surface. At this time, two adjacent batteries 10 are electrically connected through the first pole 121 and the second pole 122.

[0064] In one embodiment, the first pole 121 of one battery 10 among two adjacent batteries 10 is aligned with the second pole 122 of the other battery 10 along the first direction 001, wherein: one end of the electrical connection member 20 is electrically connected to the first pole 121 of one battery 10, and the other end extends along the first direction 001 and is electrically connected to the second pole 122 of the other battery 10.

[0065] In one embodiment, as Figure 1 and Figure 2 shown, taking the side of the housing 11 where the first pole assembly 12a is located as an example, the first pole 121a of the first pole assembly of one battery 10 is aligned with the second pole 122a of the first pole assembly of the adjacent battery 10, so that the size of the electrical connection member 20 is smaller, such as Figure 1 and Figure 2 the rectangular electrical connection member 20 in. It can be understood that the rectangular electrical connection member 20 can also be applied to the side of the housing 11 where the second pole assembly 12b is located.

[0066] Please refer to Figure 9 and Figure 10 , wherein Figure 9 schematically shows the structural diagram of the battery pack 100 provided in another embodiment of the present application; Figure 10 schematically shows the exploded structural diagram of the battery pack 100 provided in another embodiment of the present application.

[0067] In one embodiment, the first pole columns 121 of one of two adjacent batteries are aligned with the first pole columns 121 of the other battery 10 along the first direction 001, where: one end of the electrical connection member 20 is electrically connected to the first pole column 121 of one battery 10, and the other end extends toward the second pole column 122 of the other battery 10 and is electrically connected to the second pole column 122 of the other battery 10.

[0068] In one embodiment, as Figure 9 and Figure 10 shown, taking the side of the first pole column assembly 12a of the housing 11 as an example, the first pole column 121a of the first pole column assembly of one battery 10 is aligned with the first pole column 121a of the first pole column assembly of the adjacent battery 10, and is not aligned with the second pole column 122a of its first pole column assembly. The electrical connection member 20 extending toward the second pole column 122a of the first pole column assembly can also achieve the electrical connection of the adjacent batteries 10.

[0069] It can be understood that in the above two embodiments, compared with Figure 1 and Figure 2 the battery pack 100, Figure 9 and Figure 10 the electrical connection member 20 of the battery pack 100 has a larger size, a longer current conduction path, and greater loss during the current conduction process. Therefore, by aligning the first pole column 121 of one of the two adjacent batteries 10 with the second pole column 122 of the other battery 10 along the first direction 001, the power loss can be reduced.

[0070] In one embodiment, along the second direction 002, pole ear assemblies are respectively provided at both ends of each battery cell 15. The pole ear assembly includes a first pole ear and a second pole ear. The first pole ear and the second pole ear are spaced apart from each other. The first pole ear is connected between the battery cell 15 and the first pole column 121, and the second pole ear is connected between the battery cell 15 and the second pole column 122. The battery cell 15 is electrically connected to the first pole column and the second pole column through the first pole ear and the second pole ear respectively.

[0071] Please refer to Figure 11 and Figure 12 , where Figure 11 shows an exploded structural schematic diagram of a battery pack 100 from a perspective provided in an embodiment of the present application; Figure 12 shows an exploded structural schematic diagram of the battery pack 100 from another perspective provided in an embodiment of the present application.

[0072] In one embodiment, the battery pack 100 includes a first lead-out member 31 and a second lead-out member 32, and the first lead-out member 31 and the second lead-out member 32 are arranged on both sides of the plurality of batteries 10 along a first direction 001, and a first electrode 121 of one of the two batteries 10 located at both ends of the plurality of batteries 10 along the first direction 001 is conductively connected to the first lead-out member 31, and a second electrode 122 of the other battery 10 is conductively connected to the second lead-out member 32.

[0073] In one embodiment, the first lead-out member 31 includes two first connectors 311 , one ends of the two first connectors 311 are fixed to each other to form a first lead-out portion 312 , and the other ends of the two first connectors 311 are respectively connected to the two first poles 121 on both sides of the battery 10 .

[0074] In one embodiment, the second lead-out member 32 includes two second connectors 321 , one ends of the two second connectors 321 are fixed to each other to form a second lead-out portion 322 , and the other ends of the two second connectors 321 are respectively connected to the two second poles 122 on both sides of the battery 10 .

[0075] In one embodiment, if Figure 11 As shown, the first lead-out member 31 includes a first connecting member 311a and a second connecting member 311b. Figure 1 As shown, one end of the first connecting sub-component 311a and one end of the second connecting sub-component 311b are fixedly connected to form a first lead-out portion 312; or one end of the first connecting sub-component 311a and one end of the second connecting sub-component 311b are fixedly connected and one of them forms a first lead-out portion 312. The first lead-out portion 312 is located at one side of the battery pack 100 along the second direction 002, and is used to supply power to electrical equipment. The other end of the first connecting sub-component 311a extends toward the second direction 002 to the other end of the battery pack 100, and is fixed to the first pole 121 at the other end of the battery pack 100, and the other end of the second connecting sub-component 311b is fixed to the first pole 121 on the same side of the battery pack 100, thereby conducting the first poles 121 on both sides of the battery pack 100.

[0076] In one embodiment, the second lead-out member 32 may also form the structure in the above embodiment, and the second lead-out member 32 includes a third connecting member 321a and a fourth connecting member 321b, one end of the third connecting member 321a is fixedly connected to one end of the fourth connecting member 321b to form a second lead-out portion 322; or one end of the third connecting member 321a is fixedly connected to one end of the fourth connecting member 321b and one of them forms a second lead-out portion 322. The other end of the third connecting member 321a and the other end of the fourth connecting member 321b are respectively fixed to the second pole 122 of the battery pack 100 to achieve conduction of the second poles 122 on both sides of the battery pack 100.

[0077] It is understandable that there is more space on both sides of the battery pack 100 to facilitate the connection between the first lead-out portion 312 and the second lead-out portion 322 and external electrical devices.

[0078] In one embodiment, along the second direction 002, the first lead-out portion 312 and the second lead-out portion 322 are located on the same side of the battery pack 100, and the first lead-out portion 312 and the second lead-out portion 322 extend in opposite directions. The first lead-out portion 312 and the second lead-out portion 322 being located on the same side of the battery pack 100 can also facilitate the connection of external electrical devices, reduce the distance between the first lead-out portion 312 and the second lead-out portion 322, reduce the current conduction path, and improve the charge and discharge capacity of the battery pack 100. In this embodiment, the first lead-out member 31 and the second lead-out member 32 serve as the positive and negative electrodes of the battery pack 100 respectively and are used for electrically connecting to electrical devices. It is understandable that the connection to electrical devices can be facilitated through the first lead-out member 31 and the second lead-out member 32.

[0079] In one embodiment, the battery pack 100 includes a monitoring module. The monitoring module is located at one end of the battery pack 100 along the second direction 002, and the monitoring module is used to monitor the voltage of the pole assembly 12 on one side of a battery 10 along the second direction 002. The monitoring module monitors the voltages of the pole assemblies 12 on both sides of the battery 10, preventing the current of a single battery 10 from being too large and causing damage to other batteries 10, thereby ensuring the normal operation of the battery pack 100 and electrical devices. Compared with the prior art where the monitoring module needs to be connected to the poles at both ends of the battery 10 along the second direction 002, in this solution, the monitoring module only needs to be arranged on one side of the battery pack 100 along the second direction 002 to collect and monitor the voltage between the first pole 121 and the second pole 122, with a simple structure and convenient sampling.

[0080] In one embodiment, the monitoring module can measure the voltage between the first pole 121 and the second pole 122 on one side of the battery pack 100 and can also monitor the voltage of the battery 10.

[0081] In another embodiment, the monitoring module can directly measure the voltage of the electrical connection member 20 and can also monitor the voltage of the battery 10.

[0082] In another embodiment, the monitoring module can measure the voltage between the first lead-out member 31 and the second lead-out member 32 to monitor the voltage of the battery pack 100.

[0083] In one embodiment, the housing 11 is filled with electrolyte. The housing 11 is provided with a through liquid injection hole 13 along the second direction 002, and the liquid injection hole 13 is used to supplement the electrolyte in the housing 11. The liquid injection hole 13 penetrates through the housing 11 along the second direction 002, so that the liquid injection hole 13 is located on both sides of the housing 11 along the second direction 002. Compared with between the batteries 10 and the batteries 10, there is more space on both sides of the housing 11 along the second direction 002, which is convenient for the liquid injection operation.

[0084] In one embodiment, as Figure 5 and Figure 7 shown, the liquid injection hole 13 is located on one side of the first pole assembly 12a, and the electrolyte in the housing 11 can be supplemented through the liquid injection hole 13.

[0085] In another embodiment, the liquid injection hole 13 is located on one side of the second pole assembly 12b, and the electrolyte in the housing 11 can also be supplemented through the liquid injection hole 13.

[0086] In one embodiment, the housing 11 is provided with a through explosion-proof hole 14 along the second direction 002. The explosion-proof hole 14 is used for pressure relief inside the housing 11. The battery pack 100 includes an explosion-proof valve, and the explosion-proof valve is arranged in the explosion-proof hole 14, or the battery pack 100 includes an explosion-proof cover plate, and the explosion-proof cover plate slides relative to the housing 11 to cover or expose the explosion-proof hole 14. The explosion-proof hole 14 penetrates along the second direction 002, so that the explosion-proof hole 14 is located on both sides of the housing 11 along the second direction 002. Compared with between the batteries 10 and the batteries 10, there is more space on both sides of the housing 11 along the second direction 002, which is convenient for the pressure relief operation. At the same time, the high-pressure gas discharged during the pressure relief operation may damage other batteries 10. Arranging the explosion-proof hole 14 on both sides of the housing 11 can also prevent the high-pressure gas from moving towards other batteries 10 after being discharged, thereby protecting the battery pack 100.

[0087] In one embodiment, as Figure 6 and Figure 8 shown, the explosion-proof hole 14 is located on one side of the first pole assembly 12a, and the high-pressure gas inside the housing 11 is discharged through the explosion-proof hole 14.

[0088] In another embodiment, the explosion-proof hole 14 is located on one side of the second pole assembly 12b, and the high-pressure gas inside the housing 11 can also be discharged through the explosion-proof hole 14.

[0089] In one embodiment, the battery pack 100 includes an explosion-proof valve, and the explosion-proof valve is fixed on the housing 11. By opening or closing the explosion-proof valve, the inside of the housing 11 can be communicated with or separated from the outside, and the high-pressure gas inside the housing 11 can also be discharged.

[0090] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A battery pack, characterized in that: The invention comprises a plurality of batteries arranged in sequence along a first direction, each of the batteries comprising a shell, a battery cell and two pole assemblies, and the battery cell is located in the shell of the battery; Each of the pole assemblies is used to conduct the battery cell. The two pole assemblies are arranged on both sides of the battery cell along the second direction. The second direction intersects with the first direction. The two pole assemblies extend back to back and extend out of the shell respectively. The pole assemblies of each battery located on the same side along the second direction are conducted in sequence.

2. The battery pack according to claim 1, characterized in that: Each of the pole assemblies includes a first pole and a second pole spaced apart from each other, the battery pack includes an electrical connector, and the first pole of one of two adjacent batteries is connected to the second pole of the other battery through the electrical connector.

3. The battery pack according to claim 2, characterized in that: The first pole of one of the two adjacent batteries is aligned with the second pole of the other battery along the first direction, wherein: One end of the electrical connector is connected to the first pole of one of the batteries, and the other end extends along the first direction and is connected to the second pole of another of the batteries.

4. The battery pack according to claim 2, characterized in that: The first pole of one of the two adjacent batteries is aligned with the first pole of the other battery along the first direction, wherein: One end of the electrical connector is connected to the first pole of one of the batteries, and the other end extends toward the second pole of the other battery and is connected to the second pole of the other battery.

5. The battery pack according to claim 2, characterized in that: A pole lug assembly is provided at both ends of each of the battery cells along the second direction, the pole lug assembly includes a first pole lug and a second pole lug, the first pole lug and the second pole lug are spaced apart from each other, the first pole lug is connected between the battery cell and the first pole column, the second pole lug is connected between the battery cell and the second pole column, and the battery cell is respectively connected to the first pole column and the second pole column through the first pole lug and the second pole lug.

6. The battery pack according to any one of claims 2 to 5, characterized in that: The battery pack includes a first lead-out member and a second lead-out member, and the first lead-out member and the second lead-out member are arranged on both sides of the multiple batteries along the first direction. The first electrode of one of the two batteries located at both ends of the multiple batteries along the first direction is connected to the first lead-out member, and the second electrode of the other battery is connected to the second lead-out member.

7. The battery pack according to claim 6, characterized in that: The first lead-out member includes two first connectors, one ends of the two first connectors are fixed to each other to form a first lead-out portion, and the other ends of the two first connectors are respectively connected to the two first poles on both sides of the battery; and / or The second lead-out member includes two second connectors, one ends of the two second connectors are fixed to each other to form a second lead-out portion, and the other ends of the two second connectors are respectively connected to the two second poles on both sides of the battery.

8. The battery pack according to claim 7, characterized in that: The first lead-out portion and the second lead-out portion are located at a same side of the battery pack along the second direction, and the first lead-out portion and the second lead-out portion extend in opposite directions.

9. The battery pack according to any one of claims 1 to 5, characterized in that: The battery pack includes a monitoring module, which is located at one end of the battery pack along the second direction, and is used to monitor the voltage of the pole assembly of one battery located on one side along the second direction.

10. A battery device, characterized in that: The invention comprises a housing and the battery pack according to any one of claims 1 to 9, wherein the housing comprises an inner cavity, and the battery pack is arranged in the inner cavity.

11. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9, wherein the battery pack is used to power the electrical device; or The invention comprises the battery device as claimed in claim 10, wherein the battery device is used for supplying power to the electrical equipment.

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