Battery pack and electric device

Abstract

The utility model relates to a battery pack and a power utilization device, the battery pack comprises a tray, a battery cell group and a bridging piece, the tray comprises a bottom plate, a plurality of edge beams and a separation beam, the bottom plate and the plurality of edge beams are encircled to form a containing cavity, and the separation beam is arranged in the containing cavity and divides the containing cavity into a plurality of chambers; the plurality of battery cell groups are respectively positioned in the plurality of cavities; the bridging piece is positioned on the edge of the partition beam in the length direction and is connected with two adjacent battery cell groups; in the first direction, the height of the edge beam is lower than that of the bridging piece, the battery pack can be directly maintained from the side face, the maintenance difficulty of the battery pack is reduced, and the maintenance safety is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and particularly to a battery pack and an electrical device. Background Art

[0002] In a battery pack of a new energy vehicle, a plurality of battery cell groups separated by partition beams are provided in the battery pack. The plurality of battery cell groups are electrically connected to each other through jumper members on the partition beams, and are surrounded by side beams on the outer side of the battery pack. In the related art, when a fault occurs in the battery pack, there is a problem of difficult maintenance. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a battery pack and an electrical device, which can directly repair the battery pack from the side, reduce the difficulty of repairing the battery pack and improve the safety of repair, so as to at least partially solve the above technical problems.

[0004] To achieve the above purpose, a first aspect of the present disclosure provides a battery pack, including a tray, the tray includes a bottom plate, a plurality of side beams and partition beams, the bottom plate and the plurality of side beams enclose an accommodation cavity, the partition beam is disposed in the accommodation cavity and divides the accommodation cavity into a plurality of chambers; a plurality of battery cell groups, each located in one of the plurality of chambers; and jumper members, disposed on a side of the battery cell groups close to the side beams and connecting two adjacent battery cell groups; in a first direction, the height of the side beam is lower than the height of the jumper member.

[0005] Optionally, the jumper member is disposed at an end of the partition beam close to the side beam.

[0006] Optionally, an installation groove is provided at an end of the partition beam, and the jumper member is installed in the installation groove.

[0007] Optionally, the jumper member includes: a bridging portion, at least partially disposed in the installation groove; and two connecting portions, respectively connected to opposite ends of the bridging portion, and an end of the connecting portion away from the bridging portion is connected to the battery cell group.

[0008] Optionally, the number of the installation grooves is two and are respectively located on opposite sides in the length direction of the partition beam.

[0009] Optionally, both ends of the partition beam are respectively connected to two of the side beams.

[0010] Optionally, an inner side surface of the partition beam close to the side beam is recessed inward to form a U-shaped groove.

[0011] Optionally, an insulating member is provided between an inner side wall of the installation groove and the jumper member.

[0012] Optionally, the battery pack further includes an acquisition module connected to the battery cell group. The acquisition module is disposed on a side of the battery cell group close to the side beam. In the first direction, the height of the side beam is lower than that of the acquisition module.

[0013] Optionally, the battery cell group includes a plurality of battery cells arranged side by side in the second direction and electrically connected to each other. Pole columns are provided at ends of the plurality of battery cells facing the side beam. The two outermost battery cells in two adjacent battery cell groups close to each other are respectively electrically connected to the adjacent two battery cell groups through the jumper; the second direction intersects with the first direction; in the first direction, the height of the side beam is lower than that of the pole columns.

[0014] Optionally, the partition beam includes at least one first partition beam extending in the third direction and arranged at intervals in the second direction; and a second partition beam extending in the second direction and connected to the at least one first partition beam, where the third direction, the second direction and the first direction are perpendicular to each other in pairs.

[0015] Optionally, the side beam includes: a first beam structure extending in the second direction and having two arranged at intervals in the third direction; and a second beam structure extending in the third direction and having two ends respectively connected to the two first beam structures; in the first direction, the height of the second beam structure is higher than that of the first beam structure; the jumper is disposed at one end of the partition beam close to the first beam structure.

[0016] Optionally, the battery pack further includes a cover body connected to the side beam and covering the accommodation cavity. In the third direction, the lower surface of the cover body fits to the first beam structure and the second beam structure.

[0017] Optionally, the first beam structure is configured as an extruded part, and the second beam structure is configured as a casting part or an extruded part.

[0018] Optionally, the cover body is configured as a composite material part.

[0019] Optionally, the battery pack further includes a circuit board connected to the battery cell group. The circuit board and the acquisition module are respectively located on opposite sides of the battery cell group in the second direction. The acquisition module is located on a side of the battery cell group close to the side beam, and the circuit board is located on a side of the battery cell group away from the side beam.

[0020] In a second aspect of the present disclosure, there is provided an electrical device including the battery pack of any one of the above optional solutions.

[0021] With the above technical solution, that is, the battery pack provided by the present disclosure, when the battery pack needs to be repaired, since the height of the side beam is lower than the height of the jumper, and the jumper is located at the edge in the length direction of the partition beam, in this arrangement, the battery pack can be directly repaired from the side of the battery pack. The jumper can be disconnected to disconnect the electrical connection between the battery cell groups, and then other components near the edge in the battery pack can be repaired, reducing the difficulty of repairing the battery pack and improving the repair safety.

[0022] Other features and advantages of the present disclosure will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0024] Figure 1 is an exploded structural schematic diagram of the battery pack provided in the exemplary embodiment of the present disclosure;

[0025] Figure 2 is Figure 1 a partial enlarged view of position A in

[0026] Figure 3 is a schematic diagram of the mating structure of the tray and the battery cell group provided in the exemplary embodiment of the present disclosure;

[0027] Figure 4 is Figure 3 a schematic diagram of the mating structure of the tray and the battery cell group rotated 180° along the horizontal plane of the battery pack;

[0028] Figure 5 is a schematic diagram of the structure of the tray provided in the exemplary embodiment of the present disclosure.

[0029] DESCRIPTION OF THE REFERENCE NUMERALS

[0030] 1 - Tray; 101 - Accommodating cavity; 110 - Bottom plate; 120 - Side beam; 121 - First beam structure; 122 - Second beam structure; 130 - Partition beam; 131 - Installation groove; 132 - First partition beam; 133 - Second partition beam; 2 - Battery cell group; 210 - Battery cell; 220 - Terminal; 3 - Jumper; 310 - Jumping portion; 320 - Connecting portion; 4 - Insulating member; 5 - Acquisition module; 6 - Cover body; 7 - Distribution box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe in detail the specific implementation of the present disclosure with reference to the drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0032] In the present disclosure, unless otherwise stated, the orientation terms such as "inside" and "outside" refer to the inside and outside relative to the contour of the component or structure itself. "First", "second", etc. are used to distinguish one element from another, without order or importance. In the accompanying drawings of the specification, the arrow X points in the first direction, the arrow Y points in the second direction, and the arrow Z points in the third direction. In addition, the same reference numerals in different reference drawings represent the same elements.

[0033] In a first aspect of the present disclosure, a battery pack is provided. Referring to Figures 1 to 5 as shown, the battery pack includes a tray 1, a battery cell group 2, and a jumper 3. The tray 1 includes a bottom plate 110, a plurality of side beams 120, and a partition beam 130. The bottom plate 110 and the plurality of side beams 120 enclose to form a receiving cavity 101. The partition beam 130 is disposed in the receiving cavity 101 and divides the receiving cavity 101 into a plurality of chambers. The number of the battery cell groups 2 is multiple and they are respectively located in the plurality of chambers. The jumper 3 is disposed on one side of the battery cell group 2 close to the side beam 120 and connects two adjacent battery cell groups 2. In the first direction, the height of the side beam 120 is lower than the height of the jumper 3.

[0034] Through the above solution, that is, the battery pack provided by the present disclosure, when the battery pack needs to be repaired, since the height of the side beam 120 is lower than the height of the jumper 3, and the jumper 3 is located at the edge in the length direction of the partition beam 130. In this arrangement, the battery pack can be directly repaired from the side of the battery pack. The jumper 3 can be disconnected to disconnect the electrical connection between the battery cell groups 2, and then other components close to the edge in the battery pack can be repaired, reducing the difficulty of repairing the battery pack and improving the repair safety.

[0035] Moreover, the height of the side beam 120 being lower than the height of the jumper 3 mentioned in the above specific embodiment can be combined with Figure 1 and Figure 2 as shown and understood as: in the first direction, the top surface of the side beam 120 along the first direction is lower than at least part of the jumper 3.

[0036] In addition, the number of the battery cell groups 2 can be any suitable number of two or more, for example Figure 4 the four battery cell groups 2 exemplified in

[0037] The present disclosure does not limit this. Figures 2 to 5 In some embodiments, referring to

[0038] Figures 2 to 5 as shown, the jumper 3 is disposed at one end of the partition beam 130 close to the side beam 120. In this way, the jumper 3 located at one end of the partition beam 130 close to the side beam 120 can facilitate the inspection, repair, or replacement of the jumper 3 by the staff when the battery pack is opened.

[0038] In some embodiments, referring to Figures 1 to 5 As shown, an installation groove 131 is provided at the end of the partition beam 130, and the jumper 3 is installed in the installation groove 131. In this way, the installation groove 131 of the partition beam 130 can accommodate the jumper 3, so as to further improve the utilization space inside the battery pack.

[0039] In some embodiments, referring to Figures 1 to 5 As shown, the jumper 3 includes a bridging portion 310 and connecting portions 320. The bridging portion 310 is at least partially disposed in the installation groove 131; the number of the connecting portions 320 is two and are respectively connected to opposite ends of the bridging portion 310, and one end of the connecting portion 320 away from the bridging portion 310 is connected to the battery cell group 2. In this way, the arrangement of the installation groove 131 can allow the bridging portion 310 to be clamped in the installation groove 131, and further allow the jumper 3 to be more stably installed inside the battery pack. When the battery pack shakes or collides, the jumper 3 can also stably connect two adjacent battery cell groups 2 through the two connecting portions 320. Furthermore, it can ensure the normal operation of the battery cell group 2 of the battery pack and is not easily damaged. And the bridging portion 310 can be connected to the installation groove 131 in any suitable manner. For example, referring to Figure 2 The embodiment given, the bridging portion 310 can be clamped in the installation groove 131.

[0040] It should be noted that the jumper 3 can be any component with electrical conductivity. For example, the jumper 3 can be a single aluminum busbar, or a copper-aluminum busbar or any other component with electrical conductivity. The present disclosure does not make specific limitations in this regard. In addition, the jumper 3 can also include a high-voltage module with an intelligent fuse and relay structure. In this arrangement, the high-voltage module with an intelligent fuse and relay structure can also improve the safety of the transmitted current during the process of the above-mentioned aluminum busbar or copper-aluminum busbar conducting electricity or transmitting current to multiple battery cell groups 2, and further improve the safety performance of the battery pack as a whole.

[0041] In some embodiments, referring to Figures 2 to 5 As shown, the number of the installation grooves 131 is two and are respectively located on opposite sides in the length direction of the partition beam 130. With this arrangement, the installation grooves 131 on both sides of the partition beam 130 can be respectively provided with jumpers 3. On the premise that multiple battery cell groups 2 can be connected through the jumpers 3, when the battery pack is opened for repair, it can be directly opened for repair from any side of the battery pack, that is, referring to Figure 4 and Figure 5As shown, an installation groove 131 is provided on both sides of the partition beam 130, that is, one on the left and one on the right. In this way, when there is a problem with the jumper 3 or other device components on the left side of the battery pack, the battery pack can be directly opened for repair from the left side of the battery pack. When there is a problem with the jumper 3 or other device components on the right side of the battery pack, the battery pack can be directly opened for repair from the right side of the battery pack. Furthermore, the difficulty of repairing the battery pack can be significantly reduced, and the device components inside the battery pack can be repaired more conveniently.

[0042] In some embodiments, referring to Figures 1 to 5 As shown, both ends of the partition beam 130 are respectively connected to two side beams 120. In this way, the partition beam 130 can be connected to the two side beams 120 and divide the accommodation cavity 101 into multiple chambers to accommodate multiple battery cell groups 2, and can also increase the overall structural strength of the tray 1. Furthermore, the load-bearing capacity and stability of the battery pack can be improved, and the situation where the battery pack is deformed due to pressure can be reduced.

[0043] In some embodiments, referring to Figure 2 As shown, the side surface of the partition beam 130 close to the side beam 120 is recessed inward to form a U-shaped groove, and an insulating member 4 is provided between the inner side wall of the U-shaped groove and the jumper 3. In this way, the U-shaped groove can make the jumper 3 more firmly clamped inside it. Referring to Figure 2 As shown, when the installation groove 131 is configured as a U-shaped groove, the jumper portion 310 and the two connecting portions 320 can also be jointly configured as a U-shaped member. The inner bottom surface of the U-shaped groove can be fitted with the inner bottom surface of the U-shaped member (i.e., the inner surface of the jumper portion 310). At the same time, the inner side wall surface of the U-shaped member (i.e., the inner surface of the connecting portion 320) can be fitted with the surface of the partition beam 130, and then can extend to the side wall surfaces of the two battery cell groups 2 respectively, so as to electrically connect the two battery cell groups 2. The purpose of setting the insulating member 4 is to prevent a short circuit between the jumper 3 and the partition beam 130. That is, when the partition beam 130 is made of a conductive metal material, since the jumper 3 itself needs to have conductivity to transfer the current between the multiple battery cell groups 2, direct contact between the jumper 3 and the partition beam 130 may cause a current short circuit, and the current is transmitted to the partition beam 130, resulting in a dangerous phenomenon of the battery pack catching fire and burning. The insulating member 4 can insulate between the jumper 3 and the partition beam 130. That is, referring to Figure 2 As shown, one side wall surface of the insulating member 4 can be fitted with the installation groove 131, and the opposite side wall surface can be fitted with the jumper 3, so as to achieve the effect of insulating between the jumper 3 and the partition beam 130.

[0044] In addition, in order to better insulate between the jumper 3 and the partition beam 130 and improve the fitting and installation effect of the insulating member 4 and the installation groove 131, referring to Figure 2As shown, the insulating member 4 can also be configured as a U-shaped member having the same shape as the inner wall surface of the mounting groove 131. The U-shaped member can be fitted to the inner wall surface of the mounting groove 131 over a larger area, which can improve the insulation effect.

[0045] In some embodiments, referring to Figures 1 to 4 As shown, the battery pack further includes an acquisition module 5 (BIC; Battery Integrated Controller) connected to the battery cell group 2. The acquisition module 5 is disposed on a side of the battery cell group 2 close to the side beam 120. In the first direction, the height of the side beam 120 is lower than the height of the acquisition module 5. In this way, the acquisition module 5 can acquire data such as the real-time temperature and voltage of multiple battery cell groups 2 inside the battery pack, and thus can monitor the implementation status of the battery cell groups 2 inside the battery pack, which can improve the safety performance of the battery pack. Moreover, by designing the side beam 120 to be lower than the acquisition module 5 in height, when the battery pack is opened for maintenance, the acquisition module 5 can be directly repaired or replaced from the side of the battery pack, which can reduce the difficulty of repairing the internal devices of the battery pack.

[0046] In some embodiments, referring to Figures 1 to 5 As shown, the battery cell group 2 includes a plurality of battery cells 210 arranged side by side in the second direction and electrically connected to each other. Pole columns 220 are provided at the ends of the plurality of battery cells 210 facing the side beam 120. The outermost two battery cells 210 closest to each other in two adjacent battery cell groups 2 are respectively electrically connected to a jumper 3 to electrically connect the two adjacent battery cell groups 2; the second direction intersects the first direction; in the first direction, the height of the side beam 120 is lower than the height of the pole columns 220. With this arrangement, the connecting portion 320 can sequentially connect the pole columns 220 of the plurality of battery cells 210 in series, and thus the plurality of battery cells 210 can supply power to external devices. At the same time, by designing the height of the side beam 120 to be lower than the height of the pole columns 220, after the battery pack is opened from the side, the pole columns 220 of the battery cells 210 can be directly repaired or replaced, which can facilitate the maintenance of the battery pack.

[0047] In some embodiments, referring to Figures 1 to 5As shown, the partition beam 130 includes at least one first partition beam 132 extending in the third direction and arranged at intervals in the second direction; and a second partition beam 133 extending in the second direction and connected to at least one first partition beam 132. The third direction, the second direction, and the first direction are perpendicular to each other pairwise. In this way, the first partition beam 132 and the second partition beam 133 can divide the accommodation cavity 101 into multiple chambers, and the number of the multiple chambers can be an even number. In this way, an even number of multiple battery cell groups 2 can be respectively installed in each chamber, and an even number of multiple battery cell groups 2 can also make the weight of each part in the battery pack more evenly distributed, and at the same time, it can also make the charging and discharging process of the battery pack more stable. For example, refer to Figure 5 As shown, the number of the first partition beam 132 and the second partition beam 133 is one respectively, and the first partition beam 132 and the second partition beam 133 are arranged perpendicular to each other. In this arrangement, the accommodation cavity 101 is divided into four chambers, that is, four battery cell groups 2 can be accommodated.

[0048] It should be noted that in the above specific embodiments and Figure 5 in the embodiments given, the number of the first partition beam 132 being one is exemplary. In the embodiments not disclosed in the drawings, the number of the first partition beam 132 can also be two, three or more. Correspondingly, the accommodation cavity can also be divided into four chambers, six chambers or more chambers by the first partition beam 132. The present disclosure does not make specific limitations on this.

[0049] In addition, in order to facilitate the maintenance of the battery pack, the installation groove 131 mentioned in the above specific embodiment can be provided at the edge of the first partition beam 132, or at the edge of the second partition beam 133, or installation grooves are provided at the edges of both the first partition beam 132 and the second partition beam 133. In this way, the jumper 3 can pass through from the edge of the first partition beam 132 and / or the second partition beam 133, which can not only connect the multiple battery cell groups 2, but also facilitate opening the package from the side of the battery pack for maintenance.

[0050] And, in this battery pack, there is also a distribution box 7, refer to Figure 1 、 Figure 3 and Figure 4As shown, the power distribution box 7 can also be located at the edge part of the battery accommodation cavity 101. In order to separate the multiple battery cell groups 2 in the accommodation cavity 101 from the power distribution box 7, the first separation beam 132 can also be arranged between the power distribution box 7 and the battery cell groups 2. Thus, the power distribution box 7 and the battery cell groups 2 can be separated, preventing the battery cell groups 2 from directly contacting the power distribution box 7 and causing a dangerous short - circuit situation. The power distribution box 7 can also be normally connected to the series aluminum busbars of the battery cell groups 2 through the positive and negative lead - out buses. In this arrangement, if a thermal runaway occurs in the battery cell groups 2, it will not affect the power distribution box 7, thereby preventing a more serious arcing phenomenon and improving the safety of the battery pack.

[0051] In some embodiments, referring to Figures 1 to 5 As shown, the battery pack further includes a cover body 6 connected to the side beam 120 and covering the accommodation cavity 101. In the third direction, the lower surface of the cover body 6 fits against the first beam structure 121 and the second beam structure 122. The side beam 120 includes the first beam structure 121 and the second beam structure 122. The first beam structure extends along the second direction and two are arranged at intervals along the third direction; the second beam structure extends along the third direction and its two ends are respectively connected to the two first beam structures 121; in the first direction, the height of the second beam structure 122 is higher than that of the first beam structure 121, and the cross - connecting member 3 is arranged at one end of the separation beam 130 close to the first beam structure 121. In this way, the heights of the first beam structure 121 and the second beam structure 122 are different, that is, referring to Figure 1 As shown, the height of the first beam structure 121 is lower than that of the second beam structure 122. Firstly, it is convenient for opening the package and performing maintenance from the side of the battery pack. Secondly, when the battery pack is encapsulated, the fastening effect of the overall side beam 120 and the cover body 6 can be improved, thereby improving the sealing performance of the battery pack.

[0052] It should be noted that, in order to further improve the sealing performance of the battery pack, the cover body 6 can also be made of any material with better sealing performance and better heat - resistant performance. For example, the cover body 6 can be made of composite material parts such as phase - change heat storage parts and / or sheet molding, or other materials such as steel, aluminum, and polypropylene thermoforming can also be used. The present disclosure does not make specific limitations in this regard.

[0053] In addition, to improve the cooling effect of the battery pack, when assembling the battery pack, cold plates can be provided between the cover 6 of the battery pack and the battery cell group 2, and between the tray and the battery cell group 2. The cold plates can cool multiple battery cell groups 2, thereby improving the cooling effect of the battery pack. It should be noted that setting a cold plate between the cover 6 of the battery pack and the battery cell group 2 is an upper cold plate structure, and setting a cold plate between the tray and the battery cell group 2 is a lower cold plate structure. For the convenience of manufacturing and assembling the battery pack, generally the lower cold plate method can be adopted. Or when fast charging is required for the battery pack, the upper cold plate method can be adopted. Or cold plates can be provided both above and below. Those skilled in the art can select a suitable layout method according to the internal space of the battery pack and actual needs. The present disclosure does not make specific limitations on this.

[0054] Moreover, in the above specific embodiments, multiple battery cell groups 2 all belong to different multiple modules. Potting glue can be used between the multiple modules to achieve mutual isolation, thereby avoiding the influence of heat diffusion caused by the heating of a single module on other modules.

[0055] In some embodiments, referring to Figures 1 to 5 as shown, the first beam structure 121 is configured as an extruded part, and the second beam structure 122 is configured as a casting part or an extruded part. In this way, the self-structural strength of the first beam structure 121 and the second beam structure 122 can be improved, and thus the overall firmness of the battery pack can also be improved.

[0056] In some embodiments, the battery pack further includes a circuit board connected to the battery cell group 2. The circuit board and the acquisition module 5 are respectively located on opposite sides of the battery cell group 2 along the second direction. The acquisition module 5 is located on one side of the battery cell group 2 close to the side beam 120, and the circuit board is located on the side of the battery cell group 2 far from the side beam 120. In this way, the circuit board and the information acquisition module 5 are respectively located on opposite sides of the battery cell group 2 in the second direction, which can make the layout of the battery pack more compact, thereby more effectively utilizing the internal space of the battery pack. At the same time, arranging the circuit board on the side of the battery cell group 2 far from the side beam 120 can also provide certain mechanical protection for the circuit board. When the battery pack is bumped or shaken, the risk of the circuit board being impacted or damaged by the outside can be reduced. Moreover, the occurrence of signal interference between the information acquisition module 5 and the circuit board can also be reduced.

[0057] In a second aspect of the present disclosure, an electrical device is provided. The electrical device includes the battery pack mentioned in the above specific embodiments, and the electrical device has all the beneficial effects in the above specific embodiments. The electrical device can be a vehicle, a medical device, or a large electronic device, etc. The vehicle can be a pure electric vehicle or a hybrid vehicle in the new energy field, etc.

[0058] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0059] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0060] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery pack, characterized in that: include: A tray, the tray comprising a bottom plate, a plurality of side beams and a partition beam, the bottom plate and the plurality of side beams together form a receiving cavity, the partition beam is arranged in the receiving cavity and divides the receiving cavity into a plurality of chambers; A plurality of battery cell groups, each of which is located in the plurality of chambers; and A jumper, provided on one side of the battery cell group close to the side beam and connecting two adjacent battery cell groups; In the first direction, the height of the side beam is lower than the height of the cross-connector.

2. The battery pack according to claim 1, characterized in that: The bridging member is arranged at one end of the partition beam close to the side beam.

3. The battery pack according to claim 2, characterized in that: An installation groove is provided at the end of the partition beam, and the cross-connector is installed in the installation groove.

4. The battery pack according to claim 3, characterized in that: The jumper comprises: a bridging portion, at least partially disposed in the mounting groove; and There are two connecting parts, which are respectively connected to two opposite ends of the jumper part, and one end of the connecting part away from the jumper part is connected to the battery cell group.

5. The battery pack according to claim 3, characterized in that: The number of the mounting grooves is two and they are respectively located at two opposite sides of the length direction of the partition beam.

6. The battery pack according to claim 1, characterized in that: Two ends of the partition beam are respectively connected to the two side beams.

7. The battery pack according to claim 3, characterized in that: The side surface of the partition beam close to the edge beam is recessed inwardly to form a U-shaped groove.

8. The battery pack according to any one of claims 3, 4, 5 and 7, characterized in that: An insulating member is provided between the inner side wall of the installation groove and the jumper.

9. The battery pack according to any one of claims 1 to 7, characterized in that: The battery pack further includes a collection module connected to the battery cell group. The collection module is disposed on a side of the battery cell group close to the side beam. In the first direction, the height of the side beam is lower than the height of the collection module.

10. The battery pack according to any one of claims 1 to 7, characterized in that: The battery cell group comprises a plurality of battery cells arranged side by side in a second direction and electrically connected to each other, the ends of the plurality of battery cells facing the side beam are provided with poles, and the outermost two battery cells close to each other in two adjacent battery cell groups are respectively conductively connected to the jumper to conductively connect the two adjacent battery cell groups; The second direction intersects the first direction; In the first direction, the height of the side beam is lower than the height of the pole.

11. The battery pack according to claim 10, characterized in that: The partition beam includes at least one first partition beam extending along a third direction and arranged at intervals along the second direction; and a second partition beam extending along the second direction and connected to the at least one first partition beam, wherein the third direction and the second direction are perpendicular to the first direction in pairs.

12. The battery pack according to claim 11, characterized in that: The side beam comprises: A first beam structure extending along the second direction and two of which are arranged at intervals along the third direction; and a second beam structure extending along the third direction and having two ends respectively connected to the two first beam structures; in the first direction, the height of the second beam structure is higher than that of the first beam structure; The bridging member is arranged at one end of the partition beam close to the first beam structure.

13. The battery pack according to claim 12, characterized in that: The battery pack further includes a cover body connected to the side beam and covering the accommodating cavity, and in the third direction, a lower surface of the cover body is attached to the first beam structure and the second beam structure.

14. The battery pack according to claim 13, characterized in that: The first beam structure is configured as an extruded part, and the second beam structure is configured as a cast part or an extruded part.

15. The battery pack according to claim 13, characterized in that: The cover body is constructed of a composite material.

16. The battery pack according to claim 9, characterized in that: The battery pack also includes a circuit board connected to the battery cell group, the circuit board and the acquisition module are respectively located on opposite sides of the battery cell group along the second direction, the acquisition module is located on a side of the battery cell group close to the side beam, and the circuit board is located on a side of the battery cell group away from the side beam.

17. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-16.

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