Battery pack

Abstract

The embodiment of the utility model discloses a battery pack. The battery pack comprises a shell, at least one battery cell and a fuse, one end of the battery cell is electrically connected with a first interface arranged on the shell, the other end of the battery cell is electrically connected with one end of the fuse, and the other end of the fuse is electrically connected with a second interface arranged on the shell; when the battery pack outputs a first voltage, a first breaking current of the fuse is less than or equal to a first short-circuit current of the battery pack, a second breaking current of the fuse is greater than or equal to a second short-circuit current of the battery pack, the first voltage is greater than or equal to a rated voltage of the battery pack, and the first short-circuit current is less than or equal to the second short-circuit current; therefore, the problem that the fuse cannot cut off the loop of the battery pack under the conditions that the battery pack is short-circuited and the output voltage of the battery pack is higher than the rated voltage can be avoided, fault current protection of the battery pack is realized, the safety of the battery pack is improved, and the reliability of an energy storage system where the battery pack is located is higher.

Description

Technical Field

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

[0002] A battery pack is a device that combines multiple battery cells. It's primarily composed of multiple individual cells arranged in a specific structure. Battery packs are commonly used in energy storage systems to store and release energy. Their safety performance determines the reliability and safety of these systems. Therefore, improving battery pack safety is a pressing technical challenge. Utility Model Content

[0003] In response to the deficiencies in the prior art, the present application provides a battery pack that can protect the battery pack from fault currents, thereby improving the safety of the battery pack and making the energy storage system more reliable.

[0004] To solve the above problems, in a first aspect, the present application provides a battery pack, comprising:

[0005] A housing having a first interface and a second interface;

[0006] At least one battery cell is disposed in the inner cavity of the housing, and one end of the battery cell is electrically connected to the first interface;

[0007] a fuse, one end of the fuse being electrically connected to the other end of the battery core, and the other end of the fuse being electrically connected to the second interface;

[0008] Among them, when the battery pack outputs a preset first voltage, the first breaking current of the fuse is less than or equal to the first short-circuit current of the battery pack, and the second breaking current of the fuse is greater than or equal to the second short-circuit current of the battery pack; the first voltage is greater than or equal to the rated voltage of the battery pack, and the first short-circuit current is less than or equal to the second short-circuit current.

[0009] Furthermore, in the battery pack provided in the present application, the rated voltage of the fuse is greater than or equal to the first voltage.

[0010] Furthermore, in the battery pack provided in the present application, an opening is provided on one surface of the shell, and the fuse is provided in the opening and is detachably connected to the shell.

[0011] Furthermore, in the battery pack provided in the present application, the battery pack further includes: a fuse mounting member;

[0012] The fuse mounting piece is arranged in the opening and fixedly connected to the shell; the fuse and the fuse mounting piece are detachably connected.

[0013] Furthermore, in the battery pack provided in the present application, the battery pack also includes: a first protective member, which is detachably connected to the shell and seals the fuse at the opening.

[0014] Furthermore, in the battery pack provided in the present application, the fuse is further provided with a main body portion, and the main body portion passes through the first protective member.

[0015] Furthermore, in the battery pack provided in the present application, the battery pack further includes: a second protective member, the second protective member being detachably connected to the shell to close the opening; or / and,

[0016] The battery pack further includes: a collection module, which is disposed in the opening and configured to collect data from the battery cells.

[0017] Furthermore, in the battery pack provided in the present application, one end of the fuse is electrically connected to the other end of the battery cell using a first conductive connector, and the other end of the fuse is electrically connected to the second interface using a second conductive connector.

[0018] Furthermore, in the battery pack provided in the present application, the first conductive connector includes: a first electrical connection portion, a second electrical connection portion, and a third electrical connection portion;

[0019] wherein one end of the first electrical connection portion is electrically connected to one end of the fuse, the other end of the first electrical connection portion is electrically connected to one end of the second electrical connection portion by bending, the other end of the second electrical connection portion is electrically connected to one end of the third electrical connection portion by bending, and the other end of the third electrical connection portion is electrically connected to the other end of the battery cell; or / and,

[0020] The second conductive connecting member includes: a fourth electrical connecting portion, a fifth electrical connecting portion and a sixth electrical connecting portion;

[0021] Among them, one end of the fourth electrical connection part is electrically connected to the other end of the fuse, the other end of the fourth electrical connection part is electrically connected to one end of the fifth electrical connection part by bending, the other end of the fifth electrical connection part is electrically connected to one end of the sixth electrical connection part by bending, and the other end of the sixth electrical connection part is electrically connected to the second interface.

[0022] Furthermore, in the battery pack provided in the present application, the first interface, the second interface and the fuse are provided on the same side of the housing; or / and,

[0023] The battery pack further includes a maintenance switch, one end of the maintenance switch is electrically connected to the second interface, and the other end of the maintenance switch is electrically connected to the other end of the fuse.

[0024] Furthermore, in the battery pack provided in the present application, the battery pack is also provided with an explosion relief valve and a communication interface, and the explosion relief valve, the communication interface, the first interface and the second interface are provided on the same side of the shell.

[0025] In a second aspect, the present application further provides an energy storage system, which includes: at least one battery cluster, the battery cluster including at least one battery pack according to the first aspect.

[0026] The battery pack provided in the present application includes a shell, at least one battery cell and a fuse, one end of the battery cell is electrically connected to a first interface provided on the shell, the other end of the battery cell is electrically connected to one end of the fuse, and the other end of the fuse is electrically connected to a second interface provided on the shell; when the battery pack outputs a first voltage, the first breaking current of the fuse is less than or equal to the first short-circuit current of the battery pack, the second breaking current of the fuse is greater than or equal to the second short-circuit current of the battery pack, the first voltage is greater than or equal to the rated voltage of the battery pack, and the first short-circuit current is less than or equal to the second short-circuit current, thereby avoiding the problem that the fuse cannot cut off the circuit of the battery pack when a short circuit occurs in the battery pack and the output voltage of the battery pack is higher than the rated voltage, thereby realizing fault current protection of the battery pack, improving the safety of the battery pack, and making the energy storage system in which the battery pack is located more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 A schematic block diagram of a battery pack provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0030] Figure 3 A schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0031] Figure 4 Another structural schematic diagram of the battery pack provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the partial structure of a battery pack provided in an embodiment of the present application;

[0033] Figure 6 A schematic structural diagram of a fuse provided in an embodiment of the present application;

[0034] Figure 7 A schematic structural diagram of a fuse mounting member provided in an embodiment of the present application;

[0035] Figure 8 A schematic structural diagram of a first protective member provided in an embodiment of the present application;

[0036] Figure 9 A schematic diagram of the structure of the protective cover provided in an embodiment of the present application;

[0037] Figure 10 A schematic structural diagram of a first conductive connector provided in an embodiment of the present application;

[0038] Figure 11 A schematic structural diagram of the second conductive connecting member provided in an embodiment of the present application.

[0039] Among them, 10 is a battery pack, 110 is a shell, 111 is an opening, 101 is a first interface, 102 is a second interface, 120 is a battery cell, 130 is a fuse, 1301 is a first connecting portion, 1302 is a second connecting portion, 1303 is a main body, 1304 is a through hole, 140 is a fuse mounting member, 1401 is a first mounting portion, 1402 is a second mounting portion, 150 is a first protective member, 1501 is a first embedded portion, and 1502 is a second embedded portion , 151 is a protective cover, 1511 is a third mounting part, 160 is a second protective part, 170 is a collection module, 180 is a maintenance switch, 190 is an explosion relief valve, 200 is a communication interface, 210 is a first conductive connecting part, 2101 is a first electrical connecting part, 2102 is a second electrical connecting part, 2103 is a third electrical connecting part, 220 is a second conductive connecting part, 2201 is a fourth electrical connecting part, 2202 is a fifth electrical connecting part, and 2203 is a sixth electrical connecting part. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] It should be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" that may be mentioned in the description of this application indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] In related technologies, a low-voltage fuse is typically installed in a battery pack. If a short circuit occurs in the battery pack and the battery pack's output voltage is lower than the rated voltage of the low-voltage fuse, the low-voltage fuse will immediately blow, severing the battery pack's circuit, thereby preventing the fault from spreading and damaging the battery pack. However, if the low-voltage fuse is faced with a battery pack short circuit and the battery pack's output voltage is not lower than the rated voltage of the low-voltage fuse, it may fail, resulting in a loss of protection for the battery pack.

[0044] The "low voltage" in low-voltage fuses refers to a rated voltage of no more than 1000V. Low-voltage fuses are primarily used in low-voltage power distribution and control systems. They automatically cut off current in the event of a short circuit or severe overload, protecting electrical equipment from damage. Furthermore, the "full voltage" mentioned in this application refers to a battery pack whose output voltage is greater than the rated voltage.

[0045] To this end, the present application provides a battery pack, which is provided with a fuse, and when the first voltage output by the battery pack is greater than the rated voltage of the battery pack, the first breaking current of the fuse is set to be less than or equal to the first short-circuit current of the battery pack, and the second breaking current of the fuse is greater than or equal to the second short-circuit current of the battery pack, and the first short-circuit current is less than or equal to the second short-circuit current. This can avoid the situation where the fuse cannot cut off the circuit of the battery pack when the battery pack is short-circuited and the first voltage output by the battery pack is higher than the rated voltage of the battery pack, thereby realizing the protection of the battery pack from global fault current, improving the safety of the battery pack, and making the energy storage system where the battery pack is located more reliable. Among them, the fault current refers to the abnormally high current caused by insulation damage or short circuit in the power system. At the same time, the global fault current mentioned in this application can be understood as the fault current between the minimum short-circuit current and the maximum short-circuit current of the battery pack.

[0046] See also Figure 1 and Figure 2 , Figure 1 A schematic block diagram of a battery pack 10 provided in an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the battery pack 10 provided in the embodiment of the present application. Figure 1 and Figure 2 As shown, a battery pack 10 includes:

[0047] The housing 110 is provided with a first interface 101 and a second interface 102;

[0048] At least one battery cell 120 is disposed in the inner cavity of the housing 110 , and one end of the battery cell 120 is electrically connected to the first interface 101 ;

[0049] A fuse 130 , one end of the fuse 130 being electrically connected to the other end of the battery cell 120 , and the other end of the fuse 130 being electrically connected to the second interface 102 ;

[0050] In which, when the battery pack 10 outputs a preset first voltage, the first breaking current of the fuse 130 is less than or equal to the first short-circuit current of the battery pack 10, and the second breaking current of the fuse 130 is greater than or equal to the second short-circuit current of the battery pack 10; the first voltage is greater than or equal to the rated voltage of the battery pack 10, and the first short-circuit current is less than or equal to the second short-circuit current.

[0051] Specifically, the fuse 130 mentioned in this application can disconnect the battery pack 10 circuit when a short circuit occurs in the battery pack 10 and the output voltage is higher than the rated voltage of the battery pack 10. The first voltage can be understood as the maximum output voltage of the battery pack 10, which is higher than the rated voltage of the battery pack 10. The first breaking current can be understood as the minimum breaking current of the fuse 130 when the battery pack 10 outputs the first voltage, and the second breaking current can be understood as the maximum breaking current of the fuse 130 when the battery pack 10 outputs the first voltage. The first short-circuit current can be understood as the minimum short-circuit current of the battery pack 10, and the second short-circuit current can be understood as the maximum short-circuit current of the battery pack 10.

[0052] Therefore, when selecting the fuse 130 in the battery pack 10, the present application may pre-set the battery pack 10 to a full voltage state, that is, a state where the battery pack 10 has a maximum output voltage and the maximum output voltage is higher than the rated voltage of the battery pack 10, and at the same time simulate the minimum short-circuit current of the battery pack 10. When the selected fuse 130 is able to cut off the circuit of the battery pack 10 under the condition of the minimum short-circuit current of the battery pack 10, it is necessary to further screen the fuse. Specifically, the maximum short-circuit current of the battery pack 10 may be simulated. When the selected fuse 130 is able to cut off the circuit of the battery pack 10 under the condition of the maximum short-circuit current of the battery pack 10, it can be used as the fuse 130 of the present application. In other words, the fuse 130 is configured to cut off the circuit of the battery pack 10 when the battery pack 10 is in a full voltage state and the minimum short-circuit current and the maximum short-circuit current occur.

[0053] Among them, the fuse 130 can be an aBat fuse, one end of the fuse 130 can be electrically connected to the negative pole of the battery cell 120 in the battery pack 10, and the other end of the fuse 130 can be electrically connected to the second interface 102 on the battery pack 10, that is, the total negative pole of the battery pack 10, and the first interface 101 on the shell 110 of the battery pack 10 can be the total positive pole of the battery pack 10.

[0054] It should be noted that when the first short-circuit current is the minimum short-circuit current of the battery pack 10, the second short-circuit current may not be the maximum short-circuit current of the battery pack 10, and the second short-circuit current only needs to be greater than the first short-circuit current; when the second short-circuit current is the maximum short-circuit current of the battery pack 10, the first short-circuit current may not be the minimum short-circuit current of the battery pack 10, and the first short-circuit current only needs to be less than the second short-circuit current.

[0055] The battery pack 10 provided in the present application includes a shell 110, at least one battery cell 120 and a fuse 130. One end of the battery cell 120 is electrically connected to a first interface 101 provided on the shell 110, the other end of the battery cell 120 is electrically connected to one end of the fuse 130, and the other end of the fuse 130 is electrically connected to a second interface 102 provided on the shell 110. When the battery pack 10 outputs a first voltage, the first breaking current of the fuse 130 is less than or equal to the first short-circuit current of the battery pack 10, the second breaking current of the fuse 130 is greater than or equal to the second short-circuit current of the battery pack 10, and the first short-circuit current is less than or equal to the second short-circuit current. This can avoid the problem that the fuse 130 cannot cut off the circuit of the battery pack 10 when a short circuit occurs in the battery pack 10 and the output voltage of the battery pack 10 is higher than the rated voltage, thereby realizing global fault current protection for the battery pack 10, improving the safety of the battery pack 10, and making the energy storage system in which the battery pack 10 is located more reliable.

[0056] In some embodiments, the rated voltage of fuse 130 is greater than or equal to the first voltage. Specifically, to further prevent the battery pack 10 from short-circuiting and the fuse 130 from being unable to disconnect the battery pack 10 circuit, the rated voltage of fuse 130 needs to be set to be greater than or equal to the first voltage. This can further improve the safety of the battery pack 10 and enhance the reliability of the energy storage system.

[0057] In some embodiments, as Figure 3 As shown, an opening 111 is defined on one surface of the housing 110 , and the fuse 130 is disposed in the opening 111 and is detachably connected to the housing 110 .

[0058] In this embodiment, the fuse 130 can be detachably fixedly connected to the housing 110 within the opening 111. The opening 111 can be located on the side of the housing 110 or on the upper surface of the housing 110. The fuse 130 is disposed within the opening 111 and is electrically connected to the battery cell 120 and the second interface 102, respectively. Therefore, after a small short-circuit current occurs in the battery pack 10 and the fuse 130 blows, the fuse 130 can be promptly replaced at the opening 111, thereby significantly saving the battery pack 10 disassembly process and reducing the maintenance cost of the battery pack 10.

[0059] In some embodiments, as Figure 4 and Figure 5 As shown, the battery pack 10 further includes a fuse mounting member 140 ; ​​wherein the fuse mounting member 140 is disposed in the opening 111 and fixedly connected to the housing 110 , and the fuse 130 is detachably connected to the fuse mounting member 140 .

[0060] Specifically, the fuse mounting member 140 may be disposed in the opening 111 and fixed to the housing 110 of the battery pack 10 . The fuse 130 and the fuse mounting member 140 may be detachably and fixedly connected to facilitate inspection and maintenance of the fuse 130 .

[0061] Furthermore, in some embodiments, Figure 6 and Figure 7 As shown, the fuse 130 is provided with a first connection portion 1301 and a second connection portion 1302 , and the first connection portion 1301 and the second connection portion 1302 are both detachably connected to the fuse mounting member 140 .

[0062] In this embodiment, the first connection portion 1301 and the second connection portion 1302 are both detachably fixedly connected to the fuse mounting member 140. The first connection portion 1301 and the second connection portion 1302 are respectively located at the two ends of the fuse 130, and each of the first connection portion 1301 and the second connection portion 1302 is provided with a through hole 1304. During the installation of the fuse 130 on the fuse mounting member 140, bolts can be inserted through the through holes 1304 at both ends of the fuse 130 and abutted against the fuse mounting member 140, thereby allowing the fuse 130 to be mounted on the fuse mounting member 140. The first connection portion 1301 and the second connection portion 1302 can serve as the positive and negative electrodes of the fuse 130, respectively. When the first connection portion 1301 and the second connection portion 1302 of the fuse 130 are detachably fixedly connected to the fuse mounting member 140, the fuse mounting member 140 must be made of insulating material.

[0063] Furthermore, the fuse mount 140 includes a first mounting portion 1401 and a second mounting portion 1402. The first mounting portion 1401 and the second mounting portion 1402 are integrally formed to form an L-shaped fuse mount 140. The first mounting portion 1401 is fixedly connected to the top of the battery pack 10, specifically, the top of the housing 110. The fuse 130 can be fixed to the second mounting portion 1402 using two bolts. Furthermore, when the fuse 130 is mounted to the second mounting portion 1402 using bolts, the bolts can be made of an insulating material to prevent the fuse 130 from short-circuiting when it is installed on the fuse mount 140.

[0064] In some embodiments, as Figure 3 and Figure 8 As shown, the battery pack 10 further includes a first protective member 150 ; wherein the first protective member 150 is detachably connected to the housing 110 , and the first protective member 150 seals the fuse 130 at the opening 111 .

[0065] Specifically, after the fuse 130 is mounted on the fuse mounting member 140, the present application further requires a first protective member 150 to be provided on the fuse 130 to prevent both ends of the fuse 130 from being exposed to the outside world. The first protective member 150 may be a protective shell, with a first embedded portion 1501 provided at one end of the first protective member 150 and a second embedded portion 1502 provided at the other end. The first embedded portion 1501 and the second embedded portion 1502 may be embedded at both ends of the fuse 130 to protect the fuse 130.

[0066] In some embodiments, as Figure 3 As shown, the fuse 130 further includes a main body 1303, which passes through the first protective member 150. Specifically, the main body 1303 of the fuse 130 passes through the first protective member 150 to expose the body of the fuse 130, thereby facilitating heat dissipation of the fuse 130 and preventing the fuse 130 from malfunctioning due to excessive temperature.

[0067] In some embodiments, as Figure 9 As shown, the first protective member 150 includes two protective covers 151, and the two protective covers 151 are respectively arranged at both ends of the fuse 130. The two protective covers 151 are both provided with a third mounting portion 1511, and the third mounting portion 1511 is snap-connected to the battery pack 10, thereby ensuring that the two protective covers 151 can cover and protect the two ends of the fuse 130 while achieving a detachable fixed connection with the battery pack 10.

[0068] In some embodiments, as Figure 2As shown, the battery pack 10 further includes a second protective member 160 , which is detachably connected to the housing 110 to close the opening 111 on the housing 110 .

[0069] Specifically, the second protective member 160 can be a protective shell whose size matches the size of the opening 111. After the fuse 130 is installed in the opening 111, the first protective member 150 can be used to cover both ends of the fuse 130, and the second protective member 160 can be used to cover the entire opening 111, so that the fuse 130 can be encapsulated inside the battery pack 10.

[0070] The second protective member 160 is removably fixed to the housing 110 of the battery pack 10 using screws. When the fuse 130 blows due to a short circuit in the battery pack 10, the first and second protective members 150, 160 can be quickly removed, and the fuse 130 can then be quickly removed from the battery pack 10 and replaced, greatly improving the maintenance efficiency of the battery pack 10.

[0071] In some embodiments, as Figure 3 As shown, a collection module 170 is provided at the opening 111 . The collection module 170 is provided in the opening 111 and is configured to collect data from the battery cell 120 .

[0072] In this embodiment, the acquisition module 170 can be electrically connected to each of the cells 120 within the battery pack 10 to collect charge and discharge data of the cells 120 within the battery pack 10. The acquisition module 170 can be used for status monitoring, charge and discharge control, cell balancing, thermal management, data processing, and safety protection of the battery pack 10, and can exchange information with external devices such as a controller to ensure safe, efficient, and stable operation of the battery pack 10.

[0073] In some embodiments, as Figure 2 As shown, the first interface 101 , the second interface 102 and the fuse 130 are disposed on the same side of the housing 110 .

[0074] Specifically, in order to shorten the electrical connection distance between the fuse 130 and the first interface 101 and the second interface 102, the present application can arrange the first interface 101, the second interface 102 and the fuse 130 on the same side of the shell 110. The first interface 101, the second interface 102 and the fuse 130 can be arranged on the side of the battery pack 10 or on the upper surface of the battery pack 10. The positions of the first interface 101, the second interface 102 and the fuse 130 on the battery pack 10 can be selected according to actual applications, and the present application does not make specific restrictions.

[0075] In some embodiments, as Figure 5 and Figure 10 As shown, one end of the fuse 130 is electrically connected to the other end of the battery core 120 using a first conductive connector 210 , and the other end of the fuse 130 is electrically connected to the second interface 102 using a second conductive connector 220 .

[0076] In this embodiment, the first conductive connector 210 and the second conductive connector 220 can both be copper busbars. When the first conductive connector 210 and the second conductive connector 220 are used to electrically connect various components in the battery pack 10, they can be bent to electrically connect one end of the fuse 130 to the other end of the battery cell 120 and the other end of the fuse 130 to the second interface 102.

[0077] In some embodiments, as Figure 10 As shown, the first conductive connecting member 210 includes a first electrical connecting part 2101, a second electrical connecting part 2102 and a third electrical connecting part 2103; wherein, one end of the first electrical connecting part 2101 is electrically connected to one end of the fuse 130, the other end of the first electrical connecting part 2101 is electrically connected to one end of the second electrical connecting part 2102 by bending, the other end of the second electrical connecting part 2102 is electrically connected to one end of the third electrical connecting part 2103 by bending, and the other end of the third electrical connecting part 2103 is electrically connected to the other end of the battery cell 120.

[0078] Specifically, the first electrical connection portion 2101 can be directly electrically connected to one end of the battery cell 120 within the battery pack 10. The third electrical connection portion 2103 is provided with a hole that matches the fuse 130. Therefore, while one end of the fuse 130 is fixed to the fuse mounting member 140, one end of the fuse 130 can be electrically connected to the third electrical connection portion 2103, thereby achieving electrical connection between one end of the fuse 130 and one end of the battery cell 120. Furthermore, to avoid other components or structures within the battery pack 10, the first electrical connection portion 2101 and the second electrical connection portion 2102, as well as the second electrical connection portion 2102 and the third electrical connection portion 2103, need to be bent to achieve electrical connection between one end of the fuse 130 and the other end of the battery cell 120.

[0079] In some embodiments, as Figure 11 As shown, the second conductive connecting member 220 includes: a fourth electrical connecting part 2201, a fifth electrical connecting part 2202 and a sixth electrical connecting part 2203; wherein, one end of the fourth electrical connecting part 2201 is electrically connected to the other end of the fuse, the other end of the fourth electrical connecting part 2201 is electrically connected to one end of the fifth electrical connecting part 2202 by bending, the other end of the fifth electrical connecting part 2202 is electrically connected to one end of the sixth electrical connecting part 2203 by bending, and the other end of the sixth electrical connecting part 2203 is electrically connected to the second interface.

[0080] In this embodiment, when the second conductive connector 220 is electrically connected to the other end of the fuse 130, the fourth electrical connection portion 2201 may also be provided with a hole that matches the through-hole 1304 on the other end of the fuse 130. This ensures that the other end of the fuse 130 is fixed to the fuse mounting member 140, and the other end of the fuse 130 can be electrically connected to the second interface 102 via the sixth electrical connection portion 2203. Furthermore, to avoid other components or structures within the battery pack 10, bending is required between the fourth electrical connection portion 2201 and the fifth electrical connection portion 2202, and between the fifth electrical connection portion 2202 and the sixth electrical connection portion 2203, to achieve electrical connection between the other end of the fuse 130 and the second interface 102.

[0081] In some embodiments, as Figure 2 As shown, the battery pack 10 further includes a maintenance switch 180 ; wherein one end of the maintenance switch 180 is electrically connected to the second interface 102 , and the other end of the maintenance switch 180 is electrically connected to the other end of the fuse 130 .

[0082] In this embodiment, the maintenance switch 180 is provided between the second interface 102 and the fuse 130, that is, the other end of the fuse 130 can be electrically connected to the second interface 102 through the maintenance switch 180. When the battery pack 10 fails and the circuit of the battery pack 10 needs to be disconnected, the maintenance switch 180 can be used to disconnect the circuit of the battery pack 10.

[0083] Furthermore, in some embodiments, the maintenance switch 180 , the fuse 130 , the first interface 101 , and the second interface 102 are all located on the same side of the battery pack 10 .

[0084] In some embodiments, as Figure 2 As shown, the battery pack 10 is further provided with an explosion relief valve 190 and a communication interface 200 . The explosion relief valve 190 , the communication interface 200 , the first interface 101 and the second interface 102 are provided on the same side of the housing 110 .

[0085] Specifically, the explosion relief valve 190 is a key component used to prevent the battery pack 10 from exploding due to overheating or overpressure. The working principle of the explosion relief valve 190 is mainly to automatically open through components such as valves and pressure sensors when the internal pressure of the battery pack 10 exceeds the safe range, releasing excess gas, thereby restoring the internal pressure to normal levels. When the pressure inside the battery pack 10 is lower than the explosion value set by the explosion-proof valve, the explosion-proof valve is in a closed state, and the pressure inside and outside the battery pack 10 flows freely through the waterproof and breathable membrane, ensuring that the gas flows from the high-pressure side to the low-pressure side; when the pressure inside the battery pack 10 reaches the explosion pressure value set by the explosion-proof valve, the explosion-proof valve automatically opens, directly connecting the inside and outside of the battery pack 10, quickly releasing gas, thereby preventing or reducing the damage to the battery pack 10 caused by high pressure during the explosion.

[0086] In some embodiments, the present application further provides an energy storage system, which includes at least one battery cluster, and the battery cluster includes at least one battery pack 10 mentioned in the above embodiment.

[0087] Specifically, the energy storage system provided in the present application may include multiple parallel battery clusters, each battery cluster may include multiple battery packs 10 connected in series, each battery pack 10 includes multiple series-parallel battery cells 120, and each battery pack 10 includes at least one fuse 130. When the battery pack 10 outputs a first voltage, the breaking current of the fuse 130 is greater than or equal to the first current and less than or equal to the second current, and the first voltage is greater than or equal to the rated voltage of the battery pack 10. This can avoid the problem that the fuse 130 cannot cut off the circuit of the battery pack 10 when the battery pack 10 is short-circuited and the output voltage of the battery pack 10 is higher than the rated voltage, thereby realizing global fault current protection for the battery pack 10, improving the safety of the battery pack 10, and making the energy storage system in which the battery pack 10 is located more reliable.

[0088] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A battery pack, characterized in that: include: A housing having a first interface and a second interface; at least one battery cell disposed in the inner cavity of the housing, one end of the battery cell being electrically connected to the first interface; a fuse, one end of the fuse being electrically connected to the other end of the battery core, and the other end of the fuse being electrically connected to the second interface; In which, when the battery pack outputs a preset first voltage, the first breaking current of the fuse is less than or equal to the first short-circuit current of the battery pack, and the second breaking current of the fuse is greater than or equal to the second short-circuit current of the battery pack; the first voltage is greater than or equal to the rated voltage of the battery pack, and the first short-circuit current is less than or equal to the second short-circuit current.

2. The battery pack according to claim 1, wherein: The rated voltage of the fuse is greater than or equal to the first voltage.

3. The battery pack according to claim 1, wherein: An opening is provided on one surface of the shell. The fuse is arranged in the opening and is detachably connected to the shell.

4. The battery pack according to claim 3, wherein: The battery pack further includes: a fuse mounting member; Wherein, the fuse mounting piece is arranged in the opening and fixedly connected to the housing; the fuse is detachably connected to the fuse mounting piece.

5. The battery pack according to claim 3, wherein: The battery pack further includes a first protective member, which is detachably connected to the shell and seals the fuse at the opening.

6. The battery pack according to claim 5, characterized in that: The fuse is further provided with a main body portion, and the main body portion passes through the first protective member.

7. The battery pack according to claim 3, characterized in that: The battery pack further includes: a second protective member, the second protective member being detachably connected to the housing to close the opening; or / and, The battery pack further includes a collection module, which is disposed in the opening and configured to collect data from the battery cells.

8. The battery pack according to any one of claims 1 to 7, characterized in that: One end of the fuse is electrically connected to the other end of the battery core using a first conductive connector, and the other end of the fuse is electrically connected to the second interface using a second conductive connector.

9. The battery pack according to claim 8, characterized in that: The first conductive connecting member includes: a first electrical connecting portion, a second electrical connecting portion and a third electrical connecting portion; wherein one end of the first electrical connection portion is electrically connected to one end of the fuse, the other end of the first electrical connection portion is electrically connected to one end of the second electrical connection portion by bending, the other end of the second electrical connection portion is electrically connected to one end of the third electrical connection portion by bending, and the other end of the third electrical connection portion is electrically connected to the other end of the battery cell; or / and, The second conductive connecting member includes: a fourth electrical connecting portion, a fifth electrical connecting portion and a sixth electrical connecting portion; Among them, one end of the fourth electrical connection part is electrically connected to the other end of the fuse, the other end of the fourth electrical connection part is electrically connected to one end of the fifth electrical connection part by bending, the other end of the fifth electrical connection part is electrically connected to one end of the sixth electrical connection part by bending, and the other end of the sixth electrical connection part is electrically connected to the second interface.

10. The battery pack according to any one of claims 1 to 7, characterized in that: The first interface, the second interface and the fuse are arranged on the same side of the housing; or / and, The battery pack further includes a maintenance switch, one end of which is electrically connected to the second interface, and the other end of which is electrically connected to the other end of the fuse.

11. The battery pack according to any one of claims 1 to 7, characterized in that: The battery pack is further provided with an explosion relief valve and a communication interface. The explosion relief valve, the communication interface, the first interface and the second interface are arranged on the same side of the shell.

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