Battery pack, battery apparatus, and electrical device

Abstract

The present disclosure relates to a battery pack, a battery apparatus, and an electrical device. The battery pack comprises a plurality of batteries arranged in sequence in a first direction. Each battery comprises a housing, a cell, and two pole assemblies; the cell is located in the housing of the battery; each pole assembly is used for being connected to the cell; in a second direction, the two pole assemblies are arranged on two sides of the cell, the second direction intersecting the first direction; the two pole assemblies extend away from each other and separately extend out of the housing; and the pole assemblies of the batteries located on a same side in the second direction are sequentially connected. In the battery pack of the present disclosure, the charging and discharging of the batteries are realized by means of two pole assemblies arranged on two sides, and the pole assemblies located on the two sides can shorten a conduction path of current and reduce a passing current, thereby reducing heat generated by the batteries and improving the charging and discharging capability of the batteries.

Description

A battery pack, a battery device and an electrical appliance

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202421759938.7, filed on July 23, 2024, entitled “A Battery Pack, Battery Device and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery packs, and more particularly to a battery pack, battery device, and electrical equipment. Background Technology

[0004] The battery pack is connected to the electrical equipment to provide power to the equipment.

[0005] Existing battery packs have small overcurrent areas in the tabs and terminals, resulting in high heat generation and long current conduction paths, which limits the amount of current that can pass through, thus restricting the charging and discharging capabilities of the battery pack. Summary of the Invention

[0006] In view of the aforementioned technical problems, the purpose of this disclosure is to provide a battery pack with strong charging and discharging capabilities, a battery device including the aforementioned battery pack, and an electrical device including the aforementioned battery pack or the aforementioned battery device, specifically including the following technical solutions:

[0007] In a first aspect, embodiments of this disclosure provide a battery pack, including a plurality of batteries arranged sequentially along a first direction. Each battery includes a casing, a cell, and two terminal assemblies, with the cell located inside the casing. Each terminal assembly is used to conduct electricity to the cell. Along a second direction, the two terminal assemblies are arranged on both sides of the two cells. The second direction intersects the first direction. The two terminal assemblies extend in opposite directions and extend out of the casing respectively. The terminal assemblies of each battery located on the same side along the second direction are sequentially connected.

[0008] The battery pack disclosed herein has two terminal assemblies, which are connected to the battery cells, allowing the two terminal assemblies to be charged and discharged independently, thereby enabling the power supply to electrical devices.

[0009] The battery pack disclosed herein uses two terminal post assemblies arranged on opposite sides to achieve battery charging and discharging. The terminal post assemblies located on opposite sides can reduce the current conduction path, reduce the current passing through, thereby reducing the heat generated by the battery and improving the battery's charging and discharging capability.

[0010] In one embodiment, each terminal assembly includes a first terminal and a second terminal spaced apart from each other, and the battery pack includes an electrical connector, wherein the first terminal of one of two adjacent batteries is connected to the second terminal of the other battery through the electrical connector.

[0011] In this embodiment, each terminal assembly includes a first terminal and a second terminal. An electrical connector connects the first and second terminals of two adjacent batteries, enabling the two adjacent batteries to conduct electricity, thereby conducting electricity to multiple batteries in the battery pack and increasing the capacity of the battery pack.

[0012] In one embodiment, the first terminal of one of two adjacent batteries is aligned with the second terminal of the other battery along a first direction, wherein: one end of the electrical connector is connected to the first terminal of one battery, and the other end extends along the first direction and is connected to the second terminal of the other battery.

[0013] In this embodiment, aligning the first and second terminals of the two batteries can reduce the distance between them, thereby reducing the size of the electrical connectors.

[0014] In one embodiment, the first terminal of one of two adjacent batteries is aligned with the first terminal of the other battery along a first direction, wherein: one end of the electrical connector is connected to the first terminal of one battery, and the other end extends toward and is connected to the second terminal of the other battery.

[0015] In one embodiment, each battery cell is provided with a tab assembly at both ends along the second direction. The tab assembly includes a first tab and a second tab, which are spaced apart from each other. The first tab is connected between the battery cell and the first terminal, and the second tab is connected between the battery cell and the second terminal. The battery cell is connected to the first terminal and the second terminal through the first tab and the second tab, respectively.

[0016] In this embodiment, the battery cell is connected to the first terminal and the second terminal through the first tab and the second tab, respectively. The first terminal and the second terminal can be used as the positive and negative terminals to be electrically connected to the electrical device, thereby realizing the connection between the battery cell and the electrical device.

[0017] In one embodiment, the battery pack includes a first lead and a second lead, which are arranged on both sides of a plurality of batteries along a first direction. The first terminal of one of the two batteries located at both ends of the plurality of batteries along the first direction is connected to the first lead, and the second terminal of the other battery is connected to the second lead.

[0018] In this embodiment, the first lead of the battery pack along the first direction is located on one side of the plurality of batteries, and the first lead is connected to the first terminal of the nearest battery. The second lead is located on the other side of the plurality of batteries, and the second lead is connected to the second terminal of the nearest battery, so that the first lead and the second lead serve as the positive and negative terminals of the battery pack, respectively, for electrical connection with the electrical equipment.

[0019] In one embodiment, the first lead-out member includes two first connectors, one end of which is fixedly connected to form a first lead-out portion, and the other end of which is respectively connected to two first terminals on both sides of the battery.

[0020] In one embodiment, the second lead-out member includes two second connectors, one end of which is fixedly connected to form a second lead-out portion, and the other end of which is respectively connected to two second terminals on both sides of the battery.

[0021] In one embodiment, the first lead and the second lead are located on the same side of the battery pack along the second direction, and the first lead and the second lead extend in opposite directions.

[0022] In one embodiment, the battery pack includes a monitoring module located at one end of the battery pack along a second direction, the monitoring module being used to monitor the voltage of an electrode assembly of a battery located on one side along the second direction.

[0023] In this embodiment, the monitoring module monitors the voltage of the terminal assemblies on both sides of the battery to prevent excessive current in a single battery from damaging other batteries, thereby ensuring the normal operation of the battery pack and the electrical equipment.

[0024] Secondly, this disclosure also provides a battery device, including a housing and the aforementioned battery pack, the housing including an inner cavity, and the battery pack disposed in the inner cavity.

[0025] Thirdly, this disclosure also provides an electrical device, including the aforementioned battery pack, which is used to power the electrical device; or including the aforementioned battery device, which is used to power the electrical device.

[0026] Understandably, the battery device and electrical equipment disclosed herein, by employing the aforementioned battery pack, have higher charging and discharging capabilities and lower heat generation efficiency, thereby improving the energy utilization rate of the electrical equipment. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the battery pack structure from one perspective provided in one embodiment of this disclosure;

[0028] Figure 2 is a schematic diagram of the battery pack structure from another perspective provided in one embodiment of this disclosure;

[0029] Figure 3 is a schematic diagram of the internal structure of a battery provided in one embodiment of this disclosure;

[0030] Figure 4 is a schematic diagram of part of the internal structure of the battery provided in one embodiment of the present disclosure;

[0031] Figure 5 is a schematic diagram of the battery structure from one perspective provided in one embodiment of this disclosure;

[0032] Figure 6 is a schematic diagram of the battery structure from another perspective provided in one embodiment of this disclosure;

[0033] Figure 7 is a partial structural schematic diagram of a battery from one perspective provided in one embodiment of this disclosure;

[0034] Figure 8 is a partial structural schematic diagram of a battery from another perspective provided in one embodiment of this disclosure;

[0035] Figure 9 is a schematic diagram of the structure of the battery pack provided in another embodiment of this disclosure;

[0036] Figure 10 is an exploded structural diagram of the battery pack provided in another embodiment of this disclosure;

[0037] Figure 11 is a schematic diagram of the exploded structure of a battery pack from one perspective provided in one embodiment of this disclosure;

[0038] Figure 12 is an exploded view of the battery pack from another perspective, provided in one embodiment of this disclosure.

[0039] Figure 13 is a schematic diagram of the structure of a battery device provided in one embodiment of the present disclosure;

[0040] Figure 14 is a schematic diagram of the structure of the electrical equipment provided in one embodiment of this disclosure;

[0041] Figure 15 is a schematic diagram of the structure of the electrical equipment provided in another embodiment of this disclosure. Detailed Implementation

[0042] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this disclosure are shown in the drawings. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0043] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this disclosure can be implemented. The component designations used herein, such as "first," "second," etc., are merely for distinguishing the described objects and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this disclosure include both direct and indirect connections (linkages). Directional terms used in this disclosure, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," "side," etc., are merely for reference to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of this disclosure, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this disclosure.

[0044] Please refer to Figure 13. This disclosure provides a battery device 200, which includes a housing 210 and a battery pack. The housing 210 includes an inner cavity, and the battery pack is disposed in the inner cavity.

[0045] Please refer to Figures 1-4, wherein Figure 1 illustrates a structural schematic diagram of the battery pack 100 from one perspective provided in one embodiment of the present disclosure; Figure 2 illustrates a structural schematic diagram of the battery pack 100 from another perspective provided in one embodiment of the present disclosure; Figure 3 illustrates a schematic diagram of the internal structure of the battery 10 provided in one embodiment of the present disclosure; and Figure 4 illustrates a schematic diagram of a portion of the internal structure of the battery 10 provided in one embodiment of the present disclosure.

[0046] The battery pack 100 disclosed herein includes a plurality of batteries 10 arranged sequentially along a first direction 001. Each battery 10 includes a housing 11, a cell 15 and two terminal assemblies 12, with the cell 15 located inside the housing 11 of the battery 10.

[0047] Specifically, in one embodiment, as shown in Figures 1 and 2, the battery pack 100 has a plurality of batteries 10 arranged sequentially along a first direction 001, and a second direction 002 parallel to the length direction of the batteries 10. The first direction 001 and the second direction 002 are perpendicular to each other. Referring to Figure 3, the battery pack 100 includes a battery cell 15, which is located inside the housing 11.

[0048] Each terminal assembly 12 of the battery pack 100 disclosed herein is used to conduct electricity to the cell 15, and two terminal assemblies 12 are arranged on both sides of the cell 15 along the second direction 002.

[0049] Specifically, in one embodiment, as shown in Figures 3 and 4, the battery pack 100 includes two terminal assembly 12, namely a first terminal assembly 12a and a second terminal assembly 12b. The first terminal assembly 12a and the second terminal assembly 12b are fixed to both sides of the housing 11 along the second direction 002. The first terminal assembly 12a and the second terminal assembly 12b are respectively connected to the battery cell 15. Each terminal assembly 12 includes a first terminal 121 and a second terminal 122, and the first terminal 121 and the second terminal 122 are spaced apart from each other.

[0050] The two terminal assemblies 12 of the battery pack 100 of this disclosure extend back to back and protrude from the housing 11 respectively, and the terminal assemblies 12 of each battery 10 located on the same side along the second direction 002 are sequentially connected.

[0051] Specifically, in one embodiment, one end of the first terminal assembly 12a extends toward the side away from the cell 15 and extends through the housing 11 to the outside of the housing 11, and one end of the second terminal assembly 12b extends toward the side away from the cell 15 and extends through the housing 11 to the outside of the housing 11.

[0052] In this embodiment, the first terminal assembly 12a of the plurality of batteries 10 is located on one side of the housing 11, and the first terminal assembly 12a of the plurality of batteries 10 is sequentially turned on. The second terminal assembly 12b of the plurality of batteries 10 is located on the other side of the housing 11, and the second terminal assembly 12b of the plurality of batteries 10 is sequentially turned on.

[0053] The battery 10 of the battery pack 100 disclosed herein has a battery cell 15 and two terminal assembly 12. The battery cell 15 is connected to the terminal assembly 12, and the terminal assembly 12 can be electrically connected to the electrical device 300, so that the battery cell 15 is connected to the electrical device 300, thereby realizing the power supply of the battery pack 100 to the electrical device 300.

[0054] The battery 10 of the battery pack 100 disclosed herein has two terminal assembly 12 and a cell 15. Compared with a battery structure with only one terminal assembly 12 and a cell 15, the battery 10 of the present disclosure has stronger charging and discharging capabilities, which can improve the output power of the battery 10 and reduce the charging time of the battery 10.

[0055] In existing battery packs, the positive and negative terminals of the battery terminals are located on opposite sides of the casing. The length of the current conduction path from the positive terminal through the cell to the negative terminal is the size of the battery casing. Furthermore, the battery current is relatively large, which causes severe heat generation and can easily lead to overheating of the battery pack.

[0056] In the battery pack 100 of this disclosure, the terminal assembly 12 in the battery 10 is located on opposite sides. The current conduction path length from the positive terminal through the cell 15 to the negative terminal is less than the size of the casing 11 of the battery 10, which can reduce the current conduction path and further improve the charging and discharging capability of the battery 10.

[0057] Meanwhile, the current of the battery 10 in the battery pack 100 of this disclosure is conducted by two terminal assembly 12 and the cell 15. The same current is shunted through the lines of the two relatively independent terminal assembly 12 and the cell 15, so that the current through each terminal assembly 12 and cell 15 is smaller, and the heat generation efficiency of the battery 10 due to the current is also lower, thereby reducing the heat generation of the battery pack 100.

[0058] The batteries 10 of the battery pack 100 disclosed herein are arranged sequentially along a first direction 001, and two terminal post assemblies 12 are arranged along a second direction 002 intersecting the first direction 001, such that the two terminal post assemblies 12 are not located between the two batteries 10. Compared to placing the terminals between the two batteries 10, the housing 11 has more space on both sides along the second direction 002 to facilitate the electrical connection between the electrical device 300 and the terminal post assemblies 12.

[0059] In addition, the length direction of the battery 10 is parallel to the second direction 002, which can reduce the conduction path length of the current from the positive electrode through the cell 15 to the negative electrode, thereby reducing the heat generation efficiency of the battery 10 and the battery pack 100.

[0060] Please refer to Figures 14 and 15. This disclosure also provides an electrical device 300, including the battery pack 100 described above, which is used to power the electrical device 300; or including the battery device 200 described above, which is used to power the electrical device 300.

[0061] It should be noted that the battery pack 100 disclosed herein can not only be used in electrical equipment 300 or battery device 200 to power electrical equipment 300, but also in other systems or devices that require charging and discharging, and has stronger charging and discharging capabilities and lower heat generation efficiency.

[0062] In addition, the battery 10 disclosed herein can be used not only in the battery pack 100, but also in the electrical equipment 300 or other systems or devices that require charging and discharging, and can also have stronger charging and discharging capabilities and lower heat generation efficiency.

[0063] Please refer to Figures 5-8, where Figure 5 illustrates a structural schematic diagram of the battery 10 from one perspective provided in one embodiment of the present disclosure; Figure 6 illustrates a structural schematic diagram of the battery 10 from another perspective provided in one embodiment of the present disclosure; Figure 7 illustrates a partial structural schematic diagram of the battery 10 from one perspective provided in one embodiment of the present disclosure; and Figure 8 illustrates a partial structural schematic diagram of the battery 10 from another perspective provided in one embodiment of the present disclosure.

[0064] In one embodiment, the terminal assembly 12 includes a first terminal 121 and a second terminal 122 spaced apart from each other, and the battery pack 100 includes an electrical connector 20, wherein the first terminal 121 of one of two adjacent batteries 10 is connected to the second terminal 122 of the other battery 10 through the electrical connector 20.

[0065] In one embodiment, as shown in Figures 5 and 6, the first pole assembly 12a includes two poles, namely the first pole 121a and the second pole 122a of the first pole assembly, and the second pole assembly 12b includes two poles, namely the first pole 121b and the second pole 122b of the second pole assembly.

[0066] Understandably, the two terminals in the first terminal assembly 12a can be used as the positive and negative terminals respectively, and the two terminals in the second terminal assembly 12b can be used as the positive and negative terminals respectively, so as to enable the adjacent batteries 10 to be turned on sequentially.

[0067] In one embodiment, the housing 11 has a first surface and a second surface facing the adjacent battery 10, wherein the first surface and the second surface are located on opposite sides of the housing 11 along a first direction 001. One end of the first terminal 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 terminal 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 connector 20, thereby reducing current loss when current passes through the electrical connector 20.

[0068] In another embodiment, the first terminal 121 passing through the first surface and the second terminal 122 passing through the second surface are in contact with each other, at which time two adjacent batteries 10 are electrically connected through the first terminal 121 and the second terminal 122.

[0069] In one embodiment, the first terminal 121 of one of two adjacent batteries 10 is aligned with the second terminal 122 of the other battery 10 along a first direction 001, wherein: one end of the electrical connector 20 is connected to the first terminal 121 of one battery 10, and the other end extends along the first direction 001 and is connected to the second terminal 122 of the other battery 10.

[0070] In one embodiment, as shown in Figures 1 and 2, taking the first terminal assembly 12a side of the housing 11 as an example, the first terminal 121a of the first terminal assembly of a battery 10 is aligned with the second terminal 122a of the first terminal assembly of an adjacent battery 10, resulting in a smaller size for the electrical connector 20, such as the rectangular electrical connector 20 shown in Figures 1 and 2. It is understood that the rectangular electrical connector 20 can also be applied to the second terminal assembly 12b side of the housing 11.

[0071] Please refer to Figures 9 and 10, where Figure 9 illustrates a structural schematic diagram of the battery pack 100 provided in another embodiment of the present disclosure; Figure 10 illustrates an exploded structural schematic diagram of the battery pack 100 provided in another embodiment of the present disclosure.

[0072] In one embodiment, the first terminal 121 of one of two adjacent batteries 10 is aligned with the first terminal 121 of the other battery 10 along a first direction 001, wherein: one end of the electrical connector 20 is connected to the first terminal 121 of one battery 10, and the other end extends toward the second terminal 122 of the other battery 10 and is connected to the second terminal 122 of the other battery 10.

[0073] In one embodiment, as shown in Figures 9 and 10, taking the first terminal assembly 12a side of the housing 11 as an example, the first terminal 121a of the first terminal assembly of a battery 10 is aligned with the first terminal 121a of the first terminal assembly of an adjacent battery 10, but not aligned with the second terminal 122a of its first terminal assembly. The extension of the electrical connector 20 toward the second terminal 122a of the first terminal assembly can also enable the adjacent battery 10 to conduct.

[0074] Understandably, in the two embodiments described above, compared to the battery packs 100 in Figures 1 and 2, the electrical connectors 20 of the battery packs 100 in Figures 9 and 10 are larger in size, the current conduction path is longer, and the loss during the current conduction process is greater. Therefore, by aligning the first terminal 121 of one of the two adjacent batteries 10 with the second terminal 122 of the other battery 10 along the first direction 001, the loss of electrical energy can be reduced.

[0075] In one embodiment, each battery cell 15 is provided with a tab assembly 16 at both ends along the second direction 002. The tab assembly 16 includes a first tab 161 and a second tab 162. The first tab 161 and the second tab 162 are spaced apart from each other. The first tab 161 is connected between the battery cell 15 and the first terminal 121, and the second tab 162 is connected between the battery cell 15 and the second terminal 122. The battery cell 15 is connected to the first terminal 121 and the second terminal 122 through the first tab 161 and the second tab 162, respectively.

[0076] Please refer to Figures 11 and 12, wherein Figure 11 illustrates an exploded view of the battery pack 100 from one perspective in an embodiment of the present disclosure; and Figure 12 illustrates an exploded view of the battery pack 100 from another perspective in an embodiment of the present disclosure.

[0077] In one embodiment, the battery pack 100 includes a first lead 31 and a second lead 32. The first lead 31 and the second lead 32 are arranged on both sides of a plurality of batteries 10 along a first direction 001. The first terminal 121 of one of the two batteries 10 located at both ends of the plurality of batteries 10 along the first direction 001 is connected to the first lead 31, and the second terminal 122 of the other battery 10 is connected to the second lead 32.

[0078] In one embodiment, the first lead-out member 31 includes two first connectors 311, one end of the two first connectors 311 is fixed to each other to form a first lead-out portion 312, and the other end of the two first connectors 311 is respectively connected to two first terminals 121 on both sides of the battery 10.

[0079] In one embodiment, the second lead-out member 32 includes two second connectors 321, one end of the two second connectors 321 is fixed to each other to form a second lead-out portion 322, and the other end of the two second connectors 321 is respectively connected to two second terminals 122 on both sides of the battery 10.

[0080] In one embodiment, as shown in FIG11, the first lead-out member 31 includes a first connecting sub-member 311a and a second connecting sub-member 311b. Referring to FIG1, one end of the first connecting sub-member 311a and one end of the second connecting sub-member 311b are fixedly connected to form a first lead-out portion 312; or one end of the first connecting sub-member 311a and one end of the second connecting sub-member 311b are fixedly connected, and one of them forms the first lead-out portion 312. The first lead-out portion 312 is located on one side of the battery pack 100 along the second direction 002 and is used to supply power to the electrical device 300. The other end of the first connecting sub-member 311a extends toward the second direction 002 to the other end of the battery pack 100 and is fixed to the first terminal post 121 at the other end of the battery pack 100. The other end of the second connecting sub-member 311b is fixed to the first terminal post 121 on the same side of the battery pack 100, thereby connecting the first terminal posts 121 on both sides of the battery pack 100.

[0081] In one embodiment, the second lead-out member 32 can also form the structure described in the above embodiment. The second lead-out member 32 includes a third connecting sub-member 321a and a fourth connecting sub-member 321b. One end of the third connecting sub-member 321a is fixedly connected to one end of the fourth connecting sub-member 321b to form a second lead-out portion 322; or one end of the third connecting sub-member 321a is fixedly connected to one end of the fourth connecting sub-member 321b, and one of them forms a second lead-out portion 322. The other ends of the third connecting sub-member 321a and the fourth connecting sub-member 321b are respectively fixed to the second terminal post 122 of the battery pack 100 to realize the conduction of the second terminal posts 122 on both sides of the battery pack 100.

[0082] Understandably, the battery pack 100 has more space on both sides to facilitate the connection of the first lead-out portion 312 and the second lead-out portion 322 with the external electrical equipment 300.

[0083] In one embodiment, the first lead-out portion 312 and the second lead-out portion 322 are located on the same side of the battery pack 100 along the second direction 002, and the first lead-out portion 312 and the second lead-out portion 322 extend in opposite directions. Having the first lead-out portion 312 and the second lead-out portion 322 on the same side of the battery pack 100 facilitates connection to external electrical devices 300, reduces the distance between the first lead-out portion 312 and the second lead-out portion 322, reduces the current conduction path, and improves the charging and discharging capacity of the battery pack 100. In this embodiment, the first lead-out portion 31 and the second lead-out portion 32 serve as the positive and negative terminals of the battery pack 100, respectively, for electrical connection to the electrical device 300. It is understood that the first lead-out portion 31 and the second lead-out portion 32 facilitate connection to the electrical device 300.

[0084] In one embodiment, the battery pack 100 includes a monitoring module located at one end of the battery pack 100 along the second direction 002. The monitoring module is used to monitor the voltage of the terminal assembly 12 of a battery 10 located on one side along the second direction 002. By monitoring the voltage of the terminal assemblies 12 on both sides of the battery 10, the monitoring module prevents excessive current in a single battery 10 from damaging other batteries 10, thereby ensuring the normal operation of the battery pack 100 and the electrical equipment 300. Compared to the prior art where the monitoring module needs to be connected to the terminals at both ends of the battery 10 along the second direction 002, this solution only requires the monitoring module to be set on one side of the battery pack 100 along the second direction 002 to collect and monitor the voltage between the first terminal 121 and the second terminal 122. The structure is simple and sampling is convenient.

[0085] In one embodiment, the monitoring module can measure the voltage between the first terminal 121 and the second terminal 122 on one side of the battery pack 100, and can also monitor the voltage of the battery 10.

[0086] In another embodiment, the monitoring module can directly measure the voltage of the electrical connector 20 and also monitor the voltage of the battery 10.

[0087] In another embodiment, the monitoring module can measure the voltage between the first lead 31 and the second lead 32 to monitor the voltage of the battery pack 100.

[0088] In one embodiment, the housing 11 is filled with electrolyte, and the housing 11 has a through-hole 13 along the second direction 002 for replenishing the electrolyte in the housing 11. The through-hole 13 extends through the housing 11 along the second direction 002, so that the through-hole 13 is located on both sides of the housing 11 along the second direction 002. Compared with the space between the batteries 10, the two sides of the housing 11 along the second direction 002 have more space to facilitate the electrolyte filling operation.

[0089] In one embodiment, as shown in Figures 5 and 7, the injection hole 13 is located on one side of the first electrode assembly 12a, and the electrolyte in the housing 11 can be replenished through the injection hole 13.

[0090] In another embodiment, the injection hole 13 is located on one side of the second pole assembly 12b, and the electrolyte in the housing 11 can also be replenished through the injection hole 13.

[0091] In one embodiment, the housing 11 has a through-hole 14 along the second direction 002. The blast hole 14 is used for pressure relief within the housing 11. The battery pack 100 includes a blast valve located at the blast hole 14, or the battery pack 100 includes a blast cover that slides relative to the housing 11 to cover or expose the blast hole 14. The blast hole 14 extends along the second direction 002, placing it on both sides of the housing 11 along the second direction 002. Compared to the space between batteries 10, the sides of the housing 11 along the second direction 002 provide more space for pressure relief operations. Simultaneously, the high-pressure gas discharged during pressure relief operations may damage other batteries 10. Placing the blast hole 14 on both sides of the housing 11 also prevents the high-pressure gas from moving towards other batteries 10 after discharge, thereby protecting the battery pack 100.

[0092] In one embodiment, as shown in Figures 6 and 8, the explosion-proof hole 14 is located on one side of the first pole post assembly 12a, and the high-pressure gas inside the housing 11 is discharged through the explosion-proof hole 14.

[0093] 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.

[0094] In one embodiment, the battery pack 100 includes an explosion-proof valve fixed to the housing 11. By opening or closing the explosion-proof valve, the interior of the housing 11 can be connected to or separated from the outside, and the high-pressure gas inside the housing 11 can also be discharged.

[0095] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery pack (100) comprising a plurality of batteries (10) arranged in sequence along a first direction, each of the batteries (10) comprising a housing (11), an electric cell (15) located in the housing (11) of the battery (10), and two pole assemblies (12) for conducting the electric cell (15), the two pole assemblies (12) being arranged on two sides of the electric cell (15) along a second direction intersecting the first direction, the two pole assemblies (12) extending away from each other and protruding out of the housing (11) respectively, and the pole assemblies (12) on the same side of each of the batteries (10) along the second direction being arranged in sequence.

2. The battery pack (100) of claim 1, each of the pole assemblies (12) comprising a first pole (121) and a second pole (122) spaced apart from each other, the battery pack (100) comprising an electrical connecting member (20) for conducting the first pole (121) of one of the batteries (10) to the second pole (122) of another of the batteries (10) adjacent to the one of the batteries (10).

3. The battery pack (100) of claim 2, the first pole (121) of one of the batteries (10) adjacent to another of the batteries (10) being aligned with the second pole (122) of the another of the batteries (10) along the first direction, wherein: one end of the electrical connecting member (20) is in electrical connection with the first pole (121) of the one of the batteries (10), and the other end of the electrical connecting member (20) extends along the first direction and is in electrical connection with the second pole (122) of the another of the batteries (10).

4. The battery pack (100) of claim 2, the first pole (121) of one of the batteries (10) adjacent to another of the batteries (10) being aligned with the first pole (121) of the another of the batteries (10) along the first direction, wherein: one end of the electrical connecting member (20) is in electrical connection with the first pole (121) of the one of the batteries (10), and the other end of the electrical connecting member (20) extends towards the second pole (122) of the another of the batteries (10) and is in electrical connection with the second pole (122) of the another of the batteries (10). ​ ​ ​ 5. The battery pack (100) of any one of claims 2-4, each of the battery cells (15) is provided with a tab assembly (16) at both ends thereof along the second direction, the tab assembly (16) comprises a first tab (161) and a second tab (162), the first tab (161) and the second tab (162) are spaced apart from each other, the first tab (161) is connected between the battery cell (15) and the first pole (121), the second tab (162) is connected between the battery cell (15) and the second pole (122), the battery cell (15) is connected with the first pole (121) and the second pole (122) through the first tab (161) and the second tab (162), respectively.

6. The battery pack (100) of any one of claims 2-5, the battery pack (100) comprises a first lead-out member (31) and a second lead-out member (32), 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 the first direction, the first pole (121) of one of the two batteries (10) located at both ends of the plurality of batteries (10) along the first direction is connected with the first lead-out member (31), and the second pole (122) of the other battery (10) is connected with the second lead-out member (32).

7. The battery pack (100) of claim 6, the first lead-out member (31) comprises two first connecting members (311), one end of the two first connecting members (311) is fixed to each other to form a first lead-out portion (312), the other end of the two first connecting members (311) is connected with the two first poles (121) on both sides of the battery (10), respectively; and / or the second lead-out member (32) comprises two second connecting members (321), one end of the two second connecting members (321) is fixed to each other to form a second lead-out portion (322), the other end of the two second connecting members (321) is connected with the two second poles (122) on both sides of the battery (10), respectively.

8. The battery pack (100) of claim 7, the first lead-out portion (312) and the second lead-out portion (322) are located on the same side of the battery pack (100) along the second direction, the first lead-out portion (312) and the second lead-out portion (322) extend towards each other.

9. The battery pack (100) of any one of claims 1-8, the battery pack (100) comprises a monitoring module, the monitoring module is located at one end of the battery pack (100) along the second direction, the monitoring module is used to monitor the voltage of the pole assembly (12) of one of the batteries (10) located on one side along the second direction. ​ 10. A battery device (200) comprising a housing (210) and the battery pack (100) of any one of claims 1-9, the housing (210) comprising an inner cavity, the battery pack (100) disposed in the inner cavity.

11. An electric device (300) comprising the battery pack (100) of any one of claims 1-9, the battery pack (100) used for power supply of the electric device (210); or the battery device (200) of claim 10, the battery device (200) used for power supply of the electric device (300).

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