Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a box body assembly, a battery module, at least two plug-in assemblies and a first busbar, the box body assembly is provided with a containing cavity, a partition plate is arranged in the containing cavity and divides the containing cavity into a battery bin and an electrical bin, the battery module is arranged in the battery bin and comprises at least two battery packs, and the plug-in assemblies are arranged in the electrical bin. The plugging assemblies are electrically connected with the battery packs in a one-to-one correspondence mode, and the first busbar is arranged in the electrical bin and electrically connected with the at least two plugging assemblies. According to the battery module, the plugging assembly and the first busbar are arranged in the electrical cabin, the plugging assembly and the first busbar are utilized to realize electrical connection among the plurality of battery packs in the battery module, and when the battery packs in the battery cabin are subjected to thermal runaway, the plugging assembly and the first busbar can be prevented from being influenced, so that gas-electric isolation is realized; and the risk of high-voltage short circuit during thermal runaway is reduced.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery pack. Background Art

[0002] With the serialized production of large cylindrical batteries in the domestic and international markets, the battery system design based on large cylindrical batteries will become an important technical field for new energy vehicle battery systems. The double-layer CTP battery system of large cylindrical batteries can make full use of the Z-direction space, and the products will be widely used in passenger car SUVs and commercial vehicles. However, in the traditional double-layer large cylindrical CTP design, the high-voltage circuit series busbar of the upper and lower layer modules will pass through the pressure relief cavity, resulting in easy occurrence of high-voltage short circuit due to the inability to achieve gas-electric isolation during thermal runaway. Summary of the Utility Model

[0003] An embodiment of this application provides a battery pack, which can improve the technical problem that high-voltage short circuit is likely to occur due to the inability to achieve gas-electric isolation during thermal runaway of the battery pack.

[0004] An embodiment of this application provides a battery pack, including:

[0005] A box body assembly having a receiving cavity, wherein a partition is arranged in the receiving cavity, and the partition divides the receiving cavity into a battery compartment and an electrical compartment;

[0006] A battery module arranged in the battery compartment, and the battery module includes at least two battery groups;

[0007] At least two plug-in components arranged in the electrical compartment, and the plug-in components are electrically connected to the battery groups in one-to-one correspondence;

[0008] A first busbar arranged in the electrical compartment, and the first busbar is electrically connected to at least two of the plug-in components.

[0009] In one embodiment, the plug-in component includes an insulating part and a conductive part connected to each other, the insulating part is connected to the partition, the conductive part is electrically connected to the corresponding battery group, and the first busbar is electrically connected to the conductive parts of at least two of the plug-in components.

[0010] In one embodiment, the battery pack further includes at least two second busbars, the second busbars are located in the battery compartment, the second busbars are electrically connected to the battery groups in one-to-one correspondence, and the conductive part is electrically connected to the corresponding second busbar.

[0011] In one embodiment, a through hole is formed in the partition, and the conductive part partially extends into the battery compartment through the through hole and is electrically connected to the corresponding second busbar.

[0012] In one embodiment, a mounting hole is provided on the insulating member, and the conductive member includes a first conductive connection portion and a second conductive connection portion connected to each other, the first conductive connection portion is partially embedded in the mounting hole, the first conductive connection portion is electrically connected to the first bus, and the second conductive connection portion is electrically connected to the corresponding second bus.

[0013] In one embodiment, a first fixing hole is formed on a side of the first conductive connection portion facing the first bus, the first fixing hole is a blind hole, and a second fixing hole is formed on the first bus at a position corresponding to the first fixing hole; the battery pack also includes a first fixing member, the first fixing member passes through the second fixing hole and is inserted into the first fixing hole to connect the first bus and the first conductive connection portion.

[0014] In one embodiment, the orthographic projection of the first busbar on the partition covers the orthographic projection of the first conductive connection portion on the partition.

[0015] In one embodiment, a fixing portion is protruded from the second conductive connection portion, a third fixing hole is formed on the second conductive connection portion at a position corresponding to the fixing portion, the third fixing hole penetrates the second conductive connection portion and extends to the fixing portion, and a fourth fixing hole is formed on the second bus bar at a position corresponding to the third fixing hole; the battery pack further includes a second fixing member, the second fixing member passes through the fourth fixing hole and is inserted into the third fixing hole to connect the second bus bar and the second conductive connection portion.

[0016] In one embodiment, the third fixing hole is a blind hole.

[0017] In one embodiment, a protective portion is protruded from a side of the insulating member facing away from the partition, the protective portion extends in a ring shape along the circumference of the mounting hole, and the first conductive connecting portion partially protrudes out of the mounting hole and is located in the protective portion.

[0018] Beneficial effects of the embodiments of the present application:

[0019] In an embodiment of the present application, the battery pack includes a box body assembly, a battery module, at least two plug-in components, and a first busbar. The box body assembly has a receiving cavity, and a partition is provided in the receiving cavity. The partition divides the receiving cavity into a battery compartment and an electrical compartment. The battery module is disposed in the battery compartment. The battery module includes at least two battery groups. The plug-in components are disposed in the electrical compartment, and the plug-in components are electrically connected to the battery groups one by one. The first busbar is disposed in the electrical compartment, and the first busbar electrically connects at least two plug-in components. By providing the plug-in components and the first busbar in the electrical compartment in the present application, the electrical connection between multiple battery groups in the battery module is realized by using the plug-in components and the first busbar. When a battery group in the battery compartment undergoes thermal runaway, it can avoid affecting the plug-in components and the first busbar, thereby realizing gas-electric isolation and reducing the risk of high-voltage short circuit during thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic three-dimensional structure diagram of a battery pack provided by an embodiment of the present application;

[0022] Figure 2 is a schematic connection structure diagram of a plug-in component with a first busbar and a second busbar provided by an embodiment of the present application;

[0023] Figure 3 is a cross-sectional view of a connection structure of a plug-in component with a first busbar and a second busbar provided by an embodiment of the present application;

[0024] Figure 4 is a schematic structure diagram of an insulating member in a plug-in component provided by an embodiment of the present application;

[0025] Figure 5 is a schematic structure diagram of a conductive member in a plug-in component provided by an embodiment of the present application.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS:

[0027] 100, battery pack; 110, box body assembly; 111, accommodation cavity; 112, battery compartment; 113, electrical compartment; 114, partition; 1141, through hole; 120, battery module; 121, battery pack; 130, plug-in assembly; 131, insulating part; 1311, mounting hole; 1312, protection part; 132, conductive part; 1321, first conductive connection part; 1321a, first fixing hole; 1322, second conductive connection part; 1322a, third fixing hole; 1323, fixing part; 140, first bus bar; 141, second fixing hole; 150, second bus bar; 151, fourth fixing hole; 160, first fixing member; 170, second fixing member. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0029] An embodiment of the present application provides a battery pack, as Figure 1 shown, the battery pack 100 includes a box body assembly 110. The box body assembly 110 has an accommodation cavity 111. A partition 114 is arranged in the accommodation cavity 111. The partition 114 divides the accommodation cavity 111 into a battery compartment 112 and an electrical compartment 113. The box body assembly 110 serves as a protective housing of the battery pack 100, and is used to isolate the external environment from the internal structure of the battery pack 100 to ensure the stability of the internal structure of the battery pack 100. Among them, the battery compartment 112 in the box body assembly 110 is used to place the battery module 120, and the electrical compartment 113 is used to place various electrical components.

[0030] The battery pack 100 includes a battery module 120. The battery module 120 is arranged in the battery compartment 112. The battery module 120 includes at least two battery packs 121. Each battery pack 121 includes a plurality of electrically connected battery cells. Among them, the battery packs 121 can be arranged along the depth direction of the battery compartment 112, that is, the battery module 120 is composed of two or more layers of battery packs 121.

[0031] Among them, a pressure relief cavity is formed between adjacent two battery packs 121, and the pressure relief cavity is communicated with a pressure relief channel in the side wall of the box body assembly 110. When a thermal runaway occurs in the battery pack 121 in the battery module 120, the generated high-temperature gas and flame can be discharged from the battery pack 100 through the pressure relief cavity along the pressure relief channel, so as to reduce the risk of safety accidents such as explosion of the battery pack 100 due to thermal runaway.

[0032] The battery pack 100 includes at least two plug-in components 130. The plug-in components 130 are arranged in the electrical compartment 113, and the plug-in components 130 are electrically connected to the battery packs 121 one by one, so as to lead the current and voltage channels in the battery packs 121 out of the battery compartment 112 into the electrical compartment 113, facilitating the electrical connection with other electrical components in the electrical compartment 113.

[0033] The battery pack 100 includes a first bus bar 140. The first bus bar 140 is arranged in the electrical compartment 113. The first bus bar 140 is electrically connected to at least two plug-in components 130, that is, at least two battery packs 121 are connected in series through the corresponding plug-in components 130 and the first bus bar 140. Since the first bus bar 140 is arranged in the electrical compartment 113, when a thermal runaway occurs in the battery pack 121 in the battery compartment 112, the generated high-temperature gas and flame will not affect the first bus bar 140, that is, gas-electric isolation can be achieved, thus helping to reduce the risk of high-voltage short circuit during thermal runaway.

[0034] Among them, one first bus bar 140 can be electrically connected to two plug-in components 130 or multiple plug-in components 130. If one first bus bar 140 is only electrically connected to two plug-in components 130, when the battery module 120 only includes two battery packs 121, only one first bus bar 140 is needed to achieve the series connection between the two battery packs 121; when the battery module 120 includes multiple battery packs 121 (such as N, N≥3), then N - 1 first bus bars 140 need to be arranged in the electrical compartment 113 to achieve the series connection between N battery packs 121. Each first bus bar 140 can adopt the way of connecting adjacent two battery packs 121, or other connection ways, as long as the series connection between multiple battery packs 121 can be achieved, and no special restrictions are made here.

[0035] In the embodiment of the present application, the battery pack 100 includes a box body assembly 110, a battery module 120, at least two plug-in components 130, and a first bus bar 140. The box body assembly 110 has a receiving cavity 111, and a partition 114 is arranged in the receiving cavity 111. The partition 114 divides the receiving cavity 111 into a battery compartment 112 and an electrical compartment 113. The battery module 120 is arranged in the battery compartment 112. The battery module 120 includes at least two battery groups 121. The plug-in components 130 are arranged in the electrical compartment 113. The plug-in components 130 are electrically connected to the battery groups 121 in a one-to-one correspondence. The first bus bar 140 is arranged in the electrical compartment 113. The first bus bar 140 is electrically connected to at least two plug-in components 130. In the present application, by arranging the plug-in components 130 and the first bus bar 140 in the electrical compartment 113, the electrical connection between multiple battery groups 121 in the battery module 120 is realized by using the plug-in components 130 and the first bus bar 140. When a thermal runaway occurs in the battery groups 121 in the battery compartment 112, the influence on the plug-in components 130 and the first bus bar 140 can be avoided, so as to realize gas-electric isolation and reduce the risk of high-voltage short circuit during thermal runaway.

[0036] Optionally, as Figure 2 and Figure 3 shown, the plug-in component 130 includes an insulating member 131 and a conductive member 132 which are connected to each other. The insulating member 131 is connected to the partition 114, and the conductive member 132 is electrically connected to the corresponding battery group 121. The first bus bar 140 is electrically connected to the conductive members 132 in at least two plug-in components 130. In the structure of the traditional battery pack 100, the partition 114 in the box body assembly 110 is made of a conductive material to facilitate the welding of the partition 114 to the side plate and the bottom plate in the box body assembly 110. By arranging the plug-in component 130 to be composed of the insulating member 131 and the conductive member 132, and using the insulating member 131 to be connected to the partition 114 and the conductive member 132 to be connected to the insulating member 131 again, the overall insulating connection between the plug-in component 130 and the partition 114 can be realized, and the first bus bar 140 realizes the series connection of the corresponding battery groups 121 through the electrical connection with the conductive members 132.

[0037] Wherein, fixing holes are respectively formed at the four corners of the insulating member 131, and corresponding fixing holes are also formed at the corresponding positions on the partition 114, and threads are formed in the fixing holes on the insulating member 131 and the partition 114. When assembling the plug-in component 130, the fixing member can pass through the fixing hole on the insulating member 131 and be inserted into the fixing hole on the partition 114, and the connection between the insulating member 131 and the partition 114 can be realized through thread cooperation.

[0038] In some embodiments, the battery pack 100 further includes at least two second busbars 150. The second busbars 150 are located in the battery compartment 112 and are electrically connected to the battery groups 121 in a one-to-one correspondence. The conductive members 132 are electrically connected to the corresponding second busbars 150. That is, multiple battery cells in each battery group 121 are connected in series and parallel through the second busbars 150, and then led out by the second busbars 150. The conductive members 132 lead out the voltage and current on the corresponding battery group 121 to the first busbar 140 through the electrical connection with the corresponding second busbar 150, thereby realizing the series connection between different battery groups 121.

[0039] Wherein, through holes 1141 are formed in the partition plate 114. The conductive members 132 partially extend into the battery compartment 112 through the through holes 1141 and are electrically connected to the corresponding second busbars 150. That is, the insulating members 131 in the plug-in assembly 130 are located in the electrical compartment 113. One part of the conductive member 132 is located in the electrical compartment 113 and is connected to the insulating member 131. The other part of the conductive member 132 extends into the battery compartment 112 through the through holes 1141 in the partition plate 114 and is electrically connected to the second busbar 150 in the battery compartment 112. This setting method enables the setting of the plug-in assembly 130 not to affect the electrical connection design between the second busbar 150 and multiple battery cells in the battery group 121.

[0040] Since the materials of the conductive member 132 and the partition plate 114 are both conductive materials, when the conductive member 132 passes through the through hole 1141 in the partition plate 114, it is necessary to insulate between the conductive member 132 and the partition plate 114. In the embodiments of the present application, an insulating coating can be formed on the surface of the conductive member 132, or an insulating sealing structure can be added between the conductive member 132 and the partition plate 114. While achieving the mutual insulation between the conductive member 132 and the partition plate 114, it can also play a sealing role to improve the sealing performance between the battery compartment 112 and the electrical compartment 113.

[0041] It should be noted that in other embodiments, the second busbar 150 can be partially extended into the electrical compartment 113 through the through hole 1141 and be electrically connected to the conductive member 132 in the electrical compartment 113. This setting method enables the plug-in assembly 130 to be completely located in the electrical compartment 113 to reduce the influence on the plug-in assembly 130 caused by the thermal runaway of the battery group 121. Similarly, when the second busbar 150 passes through the through hole 1141 in the partition plate 114, it is also necessary to insulate between the second busbar 150 and the partition plate 114. In the embodiments of the present application, an insulating coating can be formed on the surface of the second busbar 150, or an insulating sealing structure can be added between the second busbar 150 and the partition plate 114. While achieving the mutual insulation between the second busbar 150 and the partition plate 114, it can also play a sealing role to improve the sealing performance between the battery compartment 112 and the electrical compartment 113.

[0042] Optionally, as Figure 3 and Figure 5 shown, the insulating member 131 is provided with a mounting hole 1311. The conductive member 132 includes a first conductive connection portion 1321 and a second conductive connection portion 1322 that are connected to each other. The first conductive connection portion 1321 is partially embedded in the mounting hole 1311. The first conductive connection portion 1321 is electrically connected to the first bus bar 140, and the second conductive connection portion 1322 is electrically connected to the corresponding second bus bar 150. That is, the conductive member 132 is connected to the insulating member 131 through the dimensional fit between the first conductive connection portion 1321 and the mounting hole 1311 on the insulating member 131. The first conductive connection portion 1321 and the second conductive connection portion 1322 are respectively electrically connected to the first bus bar 140 and the second bus bar 150, so as to realize the electrical connection between the first bus bar 140 and the corresponding battery pack 121.

[0043] Wherein, the cross-sectional area of the first conductive connection portion 1321 is larger than the cross-sectional area of the second conductive connection portion 1322. The second conductive connection portion 1322 partially extends into the battery compartment 112 through the through hole 1141 on the partition plate 114 to be electrically connected to the second bus bar 150. Through the adjustment design of the cross-sectional areas of the first conductive connection portion 1321 and the second conductive connection portion 1322, while ensuring the overall current-carrying capacity of the conductive member 132, the size of the through hole 1141 on the partition plate 114 can be minimized as much as possible, thereby reducing the sealing difficulty between the battery compartment 112 and the electrical compartment 113.

[0044] It should be noted that since the first conductive connection portion 1321 and the mounting hole 1311 on the insulating member 131 are connected through dimensional fit, in order to ensure that the first conductive connection portion 1321 is properly embedded in the mounting hole 1311, a step structure can be provided on the side wall of the mounting hole in the embodiment of the present application, and the step structure is used to position the embedding position of the first conductive connection portion 1321, thereby improving the connection stability between the first conductive connection portion 1321 and the insulating member 131.

[0045] In some embodiments, a first fixing hole 1321a is formed on a side of the first conductive connection portion 1321 facing the first bus bar 140. The first fixing hole 1321a is a blind hole. A second fixing hole 141 is formed on the first bus bar 140 at a position corresponding to the first fixing hole 1321a. The battery pack 100 further includes a first fixing member 160. The first fixing member 160 passes through the second fixing hole 141 and is inserted into the first fixing hole 1321a to connect the first bus bar 140 and the first conductive connection portion 1321. That is, the first bus bar 140 and the first conductive connection portion 1321 are connected by the first fixing member 160. By setting the first fixing hole 1321a as a blind hole, when the first fixing member 160 passes through the second fixing hole 141 and is inserted into the first fixing hole 1321a, it can prevent the first fixing member 160 from directly passing through the first fixing hole 1321a and contacting the partition 114 to cause a short circuit, thereby improving the connection safety between the first bus bar 140 and the first conductive connection portion 1321.

[0046] Wherein, the orthographic projection of the first bus bar 140 on the partition 114 covers the orthographic projection of the first conductive connection portion 1321 on the partition 114, that is, the dimensions of the first bus bar 140 in the width and length directions are larger than those of the first conductive connection portion 1321, which not only helps the connection between the first bus bar 140 and the first conductive connection portion 1321, but also ensures that there is an enough contact area between the first bus bar 140 and the first conductive connection portion 1321 to improve the electrical connection effect between the first bus bar 140 and the first conductive connection portion 1321.

[0047] In other embodiments, a fixing portion 1323 protrudes from the second conductive connection portion 1322. A third fixing hole 1322a is formed on the second conductive connection portion 1322 at a position corresponding to the fixing portion 1323. The third fixing hole 1322a penetrates the second conductive connection portion 1322 and extends to the fixing portion 1323. A fourth fixing hole 151 is formed on the second bus bar 150 at a position corresponding to the third fixing hole 1322a; the battery pack 100 further includes a second fixing member 170. The second fixing member 170 passes through the fourth fixing hole 151 and is inserted into the third fixing hole 1322a to connect the second bus bar 150 and the second conductive connection portion 1322. That is, the second bus bar 150 and the second conductive connection portion 1322 are connected by the second fixing member 170. By protruding the fixing portion 1323 on the second conductive connection portion 1322 and extending the third fixing hole 1322a on the second conductive connection portion 1322 into the fixing portion 1323, the effective contact area during the connection of the second fixing member 170 can be increased, thereby improving the electrical connection effect.

[0048] Among them, the third fixing hole 1322a is a blind hole. That is, when the second fixing member 170 passes through the fourth fixing hole 151 and is inserted into the third fixing hole 1322a, the second fixing member 170 is wrapped within the fixing portion 1323 and will not protrude from the fixing portion 1323, ensuring the effective contact area of the second fixing member 170 while protecting the second fixing member 170 to avoid damage to the second fixing member 170 caused by high-temperature gas in the battery compartment 112, thereby ensuring the connection stability between the second bus bar 150 and the second conductive connection portion 1322.

[0049] In some other embodiments, as Figure 3 and Figure 4 shown, a protective portion 1312 protrudes from the side of the insulating member 131 facing away from the partition 114. The protective portion 1312 extends circumferentially along the installation hole 1311 to form a ring shape, and a part of the first conductive connection portion 1321 protrudes from the installation hole 1311 and is located within the protective portion 1312. That is, a ring-shaped protective portion 1312 is provided at the position corresponding to the installation hole 1311 on the insulating member 131, and the protective portion 1312 surrounds the first conductive connection portion 1321 to protect the first conductive connection portion 1321 and reduce the risk of interference between the first conductive connection portion 1321 and other components in the electrical compartment 113 during the assembly of the battery pack 100. In addition, by providing a ring-shaped protective portion 1312 at the position corresponding to the installation hole 1311 on the insulating member 131, it also helps to improve the overall structural strength of the insulating member 131, thereby improving the overall structural stability of the plug-in assembly.

[0050] It should be noted that since the first bus bar 140 is connected to the side of the first conductive connection portion 1321 facing away from the second conductive connection portion 1322, when the protective portion 1312 is provided in a ring shape, the first bus bar 140 connecting the two first conductive connection portions 1321 needs to cross the part of the protective portion 1312 located between the two first conductive connection portions 1321. In this regard, in this embodiment, the side of the protective portion 1312 facing away from the partition 114 can be set in the same plane as the side of the first conductive connection portion 1321 facing away from the partition 114 to ensure the protection of the first conductive portion by the protective portion 1312 without interfering with the electrical connection between the first bus bar 140 and the two first conductive connection portions 1321; or, the side of the protective portion 1312 facing away from the partition 114 can be set in the same plane as the side of the first bus bar 140 facing away from the partition 114, and an avoidance groove is provided at the position where the protective portion 1312 overlaps with the first bus bar 140, so that the protective portion 1312 can simultaneously protect the first conductive portion and the first bus bar 140 without interfering with the electrical connection between the first bus bar 140 and the two first conductive connection portions 1321.

[0051] The above has introduced the embodiments of the present application in detail. Specific examples are used in this text to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A battery pack, characterized in that: include: The box assembly has a receiving cavity, wherein a partition is arranged in the receiving cavity, and the partition divides the receiving cavity into a battery compartment and an electrical compartment; A battery module is disposed in the battery compartment, and the battery module includes at least two battery packs; At least two connector assemblies are arranged in the electrical compartment, and the connector assemblies are electrically connected to the battery packs in a one-to-one correspondence; The first bus is arranged in the electrical compartment, and the first bus is electrically connected to at least two of the connector components.

2. The battery pack according to claim 1, characterized in that: The connector assembly includes an insulating member and a conductive member connected to each other, the insulating member is connected to the partition, the conductive member is electrically connected to the corresponding battery pack, and the first busbar electrically connects the conductive members in at least two of the connector assemblies.

3. The battery pack according to claim 2, characterized in that: The battery pack further includes at least two second busbars, the second busbars are located in the battery compartment, the second busbars are electrically connected to the battery packs in a one-to-one correspondence, and the conductive member is electrically connected to the corresponding second busbars.

4. The battery pack according to claim 3, characterized in that: The partition is provided with a through hole, and the conductive member partially extends into the battery compartment through the through hole and is electrically connected to the corresponding second bus bar.

5. The battery pack according to claim 3, characterized in that: The insulating member is provided with a mounting hole, and the conductive member includes a first conductive connection portion and a second conductive connection portion connected to each other, wherein the first conductive connection portion is partially embedded in the mounting hole, the first conductive connection portion is electrically connected to the first bus, and the second conductive connection portion is electrically connected to the corresponding second bus.

6. The battery pack according to claim 5, characterized in that: A first fixing hole is formed on the side of the first conductive connection portion facing the first bus, and the first fixing hole is a blind hole. A second fixing hole is formed on the first bus at a position corresponding to the first fixing hole. The battery pack also includes a first fixing member, which passes through the second fixing hole and is inserted into the first fixing hole to connect the first bus and the first conductive connection portion.

7. The battery pack according to claim 5, characterized in that: The orthographic projection of the first busbar on the partition covers the orthographic projection of the first conductive connection portion on the partition.

8. The battery pack according to claim 5, characterized in that: A fixing portion is protruded from the second conductive connection portion, a third fixing hole is opened on the second conductive connection portion at a position corresponding to the fixing portion, the third fixing hole penetrates the second conductive connection portion and extends to the fixing portion, a fourth fixing hole is opened on the second bus at a position corresponding to the third fixing hole; the battery pack also includes a second fixing member, the second fixing member passes through the fourth fixing hole and is inserted into the third fixing hole to connect the second bus and the second conductive connection portion.

9. The battery pack according to claim 8, characterized in that: The third fixing hole is a blind hole.

10. The battery pack according to claim 5, characterized in that: A protective portion is protruded from one side of the insulating member away from the partition, and the protective portion extends in a ring shape along the circumference of the mounting hole. The first conductive connecting portion partially protrudes from the mounting hole and is located in the protective portion.

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