Battery pack and energy storage system

Abstract

The present application provides a battery pack and an energy storage system. The battery pack comprises: a housing provided with an accommodating cavity; a plurality of battery modules provided in the accommodating cavity; and a fuse assembly, the fuse assembly comprising a fuse and a fuse holder, the fuse being electrically connected to the plurality of battery modules, and the fuse holder fixing the fuse, wherein a heat dissipation structure is provided between the fuse holder and the fuse, and the heat dissipation structure is used for dissipating heat of the fuse.

Description

Battery pack and energy storage system

[0001] The present application claims priority to Chinese Patent Application No. 202411240499.3, 202422176619.X, filed on September 4, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery pack and an energy storage system.

[0003] BACKGROUND

[0004] The battery pack is usually provided with a fuse inside for providing overcurrent protection. SUMMARY

[0005] In the related art, the fuse is usually directly fixed inside the battery box, and the fuse generates heat during work. If the heat cannot be dissipated in time, it will affect the normal work and reliability of the fuse.

[0006] In a first aspect, the present application provides a battery pack, comprising: a box body provided with a containing cavity; a plurality of battery groups arranged in the containing cavity; a fuse assembly, the fuse assembly comprising a fuse and a fuse support, the fuse being electrically connected with the plurality of battery groups, and the fuse support fixing the fuse; wherein a heat dissipation structure is arranged between the fuse support and the fuse, and the heat dissipation structure is used for heat dissipation of the fuse.

[0007] In a second aspect, the present application provides an energy storage system, comprising a plurality of battery packs and a battery rack for fixing the plurality of battery packs, and the battery pack is the battery pack described above. ADVANTAGEOUS EFFECTS

[0008] (1) The battery pack provided by the present application sets a heat dissipation structure between the fuse and the fuse support, so that the heat generated by the fuse can be diffused through the heat dissipation structure, thereby reducing the working temperature of the fuse, so that the fuse can work normally.

[0009] (2) The energy storage system provided by the present application comprises the battery pack described above, and the energy storage system is designed based on the battery pack described above. Its advantageous effects are referred to the advantageous effects of the battery pack described above, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a perspective view of the battery pack provided by the embodiment of the present application;

[0011] Fig. 2 is an internal structure diagram of the battery pack provided by the first embodiment of the present application;

[0012] Fig. 3 is a partial enlarged view of Fig. 2;

[0013] Fig. 4 is a perspective view of the BMU assembly connected with the first connecting strip according to an embodiment of the present application;

[0014] Fig. 5 is a perspective view of the BMU support according to an embodiment of the present application;

[0015] Fig. 6 is another perspective view of the BMU support according to an embodiment of the present application;

[0016] Fig. 7 is a perspective view of the first connecting strip according to an embodiment of the present application;

[0017] Fig. 8 is a perspective view of the fuse assembly according to a first embodiment of the present application;

[0018] Fig. 9 is another perspective view of the fuse assembly according to the first embodiment of the present application;

[0019] Fig. 10 is an internal structure view of the battery pack according to a second embodiment of the present application;

[0020] Fig. 11 is a perspective view of the fuse assembly according to the second embodiment of the present application;

[0021] Fig. 12 is a perspective view of the heat-conducting support according to the second embodiment of the present application;

[0022] Fig. 13 is an internal structure view of the battery pack according to an embodiment of the present application;

[0023] Fig. 14 is a partial enlarged view of Fig. 13.

[0024] Reference signs:

[0025] 10, battery pack;

[0026] 1, box; 11, upper box; 12, bottom plate; 13, accommodating cavity;

[0027] 2, battery pack; 20, battery;

[0028] 3, connecting strip assembly; 31, positive busbar; 32, negative busbar; 33, inter-battery pack connecting strip; 34, first connecting strip; 341, first surface; 342, second surface; 343, first connecting section; 344, second connecting section; 345, third connecting section; 35, second connecting strip; 36, busbar fixing seat; 37, collection line; 371, negative collection line; 372, positive collection line;

[0029] 4, BMU assembly; 41, BMU; 42, BMU support; 43, main body; 44, second support part; 441, first support section; 442, second support section; 45, heat dissipation hole; 46, second fixing hole; 47, heat dissipation opening; 48, buffer sheet;

[0030] 5, fuse assembly; 51, fuse; 511, fuse tube; 512, connecting sheet; 513, insulating column; 52, fuse support; 521, base body; 522, fixing part; 523, fixing leg; 524, first fixing hole; 525, heat dissipation hole; 531, first heat dissipation interval; 532, second heat dissipation interval; 54, insulating sheet; 56, heat conduction support; 561, first support part; 5611, bottom wall; 5612, side wall; 5613, groove; 5614, first part; 5615, second part; 562, heat conduction part; 563, heat conduction cavity; 564, heat dissipation opening;

[0031] 6, maintenance window assembly; 61, maintenance cover plate; 62, explosion-proof valve;

[0032] 7, connector assembly; 71, connector support; 72, manual maintenance switch; 73, positive high-voltage terminal; 74, negative high-voltage terminal; 75, communication interface;

[0033] 8, end plate assembly; 81, end plate; 82, rectangular steel belt. Embodiments of the present application

[0034] The embodiments of the present application provide a battery pack 10, which can be a power battery pack or an energy storage battery pack. The power battery pack is used in a new energy vehicle, which can be a hybrid electric vehicle or a pure electric vehicle. The energy storage battery pack can be used in an energy storage container or an energy storage battery cabinet.

[0035] As shown in FIGS. 1-3, the battery pack 10 includes a box body 1, a plurality of battery groups 2, a connection row assembly 3, a BMU (Battery Management Unit) assembly 4, a fuse assembly 5 and a maintenance window assembly 6, a connector assembly 7, and an end plate assembly 8.

[0036] The box body 1 includes an upper box body 11 and a bottom plate 12 connected together, and the upper box body 11 and the bottom plate 12 jointly define a containing cavity 13, part of which is used to accommodate the battery group 2, and the height of the upper box body 11 is greater than the height of the bottom plate 12. The battery group 2 is basically located in the accommodation space defined by the upper box body 11, so that the box body 1 is integrally configured to facilitate assembly and later maintenance. The bottom plate 12 is located at the bottom of the battery group 2, and the bottom plate 12 is integrated with the liquid cooling plate, so that the bottom plate 12 can provide support and heat dissipation for the battery group 2.

[0037] A plurality of battery packs 2 are arranged in the accommodation space defined by the upper box 11 and the bottom plate 12, and the plurality of battery packs 2 are arranged side by side along a first direction, and each battery pack 2 includes a plurality of batteries 20 arranged side by side along a second direction. The batteries 20 can be cylindrical batteries or square batteries. In a specific embodiment, the battery pack 10 internally includes four battery packs 2, and each battery pack 2 includes thirteen batteries 20.

[0038] The end plate assembly 8 includes two end plates 81 and two rectangular steel belts 82 sleeved outside the two end plates 81, and one end plate is arranged at each end of each battery pack 2, and each battery pack 2 is fixed by the two end plates 81 and the two rectangular steel belts 82.

[0039] The BMU assembly 4 includes a BMU 41 and a BMU support 42, and the BMU 41 is arranged to monitor and manage the state of the battery pack 2, such as monitoring parameters such as voltage, current or temperature of the battery, performing balancing control of the battery, preventing overcharging and overdischarging, and communicating with other electrical assemblies inside and outside the battery pack 10, etc., to ensure safe and reliable operation of the battery and prolong the service life of the battery. The BMU support 42 is fixed to the bottom plate 12 by bolts, and a plurality of second fixing holes 46 (as shown in FIG. 5) are arranged on the BMU support 42, and the BMU 41 is fixed in the second fixing holes 46 of the BMU support 42 by bolts.

[0040] The connector assembly 7 includes a connector support 71, a manual maintenance switch 72 (MSD), a positive high-voltage terminal 73, a negative high-voltage terminal 74, a communication interface 75, etc., and the connector assembly 7 is arranged on the right side of the battery pack 10. The connector support 71 is fixed on the bottom plate 12, and the manual maintenance switch 72, the positive high-voltage terminal 73, the negative high-voltage terminal 74, and the communication interface 75 are all fixed on the connector support 71. The manual maintenance switch 72 is used to manually disconnect the battery circuit when maintenance or fault occurs. The positive high-voltage terminal 73 and the negative high-voltage terminal 74 are used to form a loop with the external high-voltage circuit to realize power transmission. The communication interface 75 is used for data communication with external power supply equipment or system to realize information interaction and monitoring functions.

[0041] The maintenance window assembly 6 includes a maintenance cover plate 61 and an explosion-proof valve 62 connected to the maintenance cover plate, and the maintenance cover plate 61 is detachably connected to the upper box 11. The maintenance cover plate 61 is used to shield the maintenance window, and in an embodiment provided in the present application, the maintenance cover plate 61 is used to shield the BMU assembly 4 and the fuse assembly 5. By integrating the explosion-proof valve 62 on the maintenance cover plate 61, the area of the region where the maintenance window is located can be further increased, thereby facilitating maintenance operations.

[0042] The fuse assembly 5 comprises a fuse 51 and a fuse holder 52, the fuse holder 52 is fixed on the bottom plate 12 by bolts, and the fuse 51 is fixed on the fuse holder 52 by an insulating column 513 (as shown in FIG. 8), and the fuse 51 is used to be fused in time when the current of the battery pack 10 abnormally rises, thereby protecting the circuit.

[0043] As shown in FIG. 2, along the width direction of the battery pack 10, the BMU assembly 4, the fuse assembly 5 and the connector assembly 7 are arranged at the same end of the battery pack 2, and the fuse assembly 5 is fixed between the BMU assembly 4 and the connector assembly 7, thereby facilitating the compactness of the structure of the battery pack 10.

[0044] The connection bar assembly 3 comprises a plurality of positive bus bars 31, a plurality of negative bus bars 32, a battery interconnection bar 33, a first connection bar 34, a second connection bar 35, a bus bar fixing seat 36 and a collection line 37, wherein the first connection bar 34 is used to electrically connect the output end of the negative bus bar 32 and the fuse 51, and the second connection bar 35 is used to electrically connect the fuse 51 and the manual maintenance switch 72.

[0045] Each battery pack 2 is provided with a positive bus bar 31 and a negative bus bar 32, the positive bus bar 31 is used to electrically connect the positive output ends of the plurality of batteries 20 in the same battery pack 2, and the negative bus bar 32 is used to electrically connect the negative output ends of the plurality of batteries 20 in the same battery pack 2. The positive bus bar 31 and the negative bus bar 32 each comprise a plurality of connection bars, each connection bar is used to connect the positive electrode of adjacent two batteries or the negative electrode of adjacent two batteries, and the plurality of batteries 20 in the same battery pack 2 are connected in series by the bus bars.

[0046] A guide groove of the bus bar fixing seat 36 is arranged on the top end surface of each end plate 81, the bus bar fixing seat 36 is fixed in the guide groove of the end plate 81, and one end of the positive bus bar 31 or the negative bus bar 32 is fixed on the bus bar fixing seat 36 by bolts.

[0047] The collection line 37 comprises a positive collection line 372 and a negative collection line 371, the positive collection line 372 is arranged to be connected with each positive connection bar in the positive bus bar 31, and the negative collection line 371 is arranged to be connected with each negative connection bar in the negative bus bar 32, the positive collection line 372 is arranged on one side of the positive bus bar 31, and the negative collection line 371 is arranged on one side of the negative bus bar 32, the positive collection line 372 and the negative collection line 371 of the same battery pack are electrically connected to the BMU 41 after being fixed by the same wire harness sleeve, and the BMU 41 collects the voltage and current data of each battery 20 in each battery pack 2 through the collection line 37.

[0048] In an embodiment provided in the present application, during the assembly of the battery pack 10, the positive busbar 31 and the positive collecting line 372 are integrated, the negative busbar 32 and the negative collecting line 371 are integrated to form a CCS (Cells Contact System) integrated material assembly, and then the CCS integrated material assembly is welded on the battery pack 2, which is beneficial to improve the production efficiency.

[0049] In some embodiments provided in the present application, referring to FIGS. 2-4, the BMU support 42 includes a main body part 43 and a second support part 44 connected with each other, the main body part 43 is used for fixing the BMU 41, and the second support part 44 is used for fixing the first connecting row 34. By fixing the first connecting row 34 on the BMU support 42, the loosening of the first connecting row 34 due to the violent vibration of the battery pack 10 can be effectively prevented. Moreover, the BMU and the first connecting row 34 are integrated on the same BMU support 42 for fixing, which can make the structure inside the battery pack 10 more compact, and is beneficial to optimize the performance of the battery pack 10.

[0050] In some embodiments, referring to FIGS. 4-7, the main body part 43 of the BMU support 42 is configured as a planar structure, two side walls are connected on both sides of the main body part 43, and a bottom wall is connected at the bottom end of the main body part 43, which is connected to the bottom plate 12 by bolts. Four second fixing holes 46 are provided on the main body part 43, two of which are provided close to the top end of the main body part 43, and the other two are provided close to the bottom end of the main body part 43, and there is sufficient spacing between the second fixing holes 46 and the bottom wall, so that the four corners of the BMU 41 are fixed to the four second fixing holes 46 by four bolts, and sufficient heat dissipation spacing is formed between the BMU 41 and the two side walls and the bottom wall of the BMU support 42.

[0051] Continuing to refer to FIGS. 4-7, a heat dissipation structure is provided on the main body part 43 of the BMU support 42, which includes at least two heat dissipation holes 45 provided on the main body part 43 and a heat dissipation opening 47 provided at the top end of the main body part 43, the heat dissipation opening 47 is located between the two second fixing holes 46, and the BMU 41 can be sufficiently cooled through the at least two heat dissipation holes 45 and the heat dissipation opening 47 and the spacing between the BMU 41 and the two side walls and the bottom wall of the BMU support 42.

[0052] In a specific embodiment, referring to FIG. 5 and FIG. 6, the main body 43 of the BMU support 42 is provided with two groups of second fixing holes 46, one group of the second fixing holes 46 includes two third fixing holes 461, and the other group of the second fixing holes 46 includes two fourth fixing holes 462, the two third fixing holes 461 are arranged at the top end of the main body 43, and the two fourth fixing holes 462 are arranged close to the bottom end of the main body 43. The two third fixing holes 461 are provided with a heat dissipation opening 47 therebetween, and the two fourth fixing holes 462 are provided with two heat dissipation holes 45 therebetween.

[0053] In a specific embodiment, the main body 43 of the BMU support 42 is provided with four heat dissipation holes 45, the BMU support 42 is provided with two second support portions 44, the four heat dissipation holes 45 are divided into two groups, each group is provided with two heat dissipation holes 45, and the second support portion 44 is arranged corresponding to the group of heat dissipation holes 45 arranged close to the top end of the main body 43, and each second support portion 44 is arranged corresponding to a heat dissipation hole 45. In alternative embodiments, the main body 43 of the BMU support 42 is provided with two heat dissipation holes, and a second support portion 44 is arranged on the heat dissipation hole arranged close to the top end of the main body 43.

[0054] In the length direction of the battery pack 10, i.e. the X direction as shown in FIG. 2, the second support portion 44 is arranged on the side of the main body 43 close to the plurality of battery groups 2. It can be understood that the first connecting row 34 needs to be electrically connected to the battery group 2, and arranging the second support portion 44 on the side of the main body 43 close to the battery group 2 is conducive to fixing the first connecting row 34 between the BMU 41 and the battery group 2, thereby making the structure inside the battery pack 10 more compact.

[0055] In a specific embodiment, continuing to refer to FIG. 4 and FIG. 5, the second support portion 44 includes a first support section 441 and a second support section 442, the first support section 441 and the second support section 442 are connected in a bent manner, the first support section 441 is connected between the main body 43 and the second support section 442, and the first support section 441 extends from the wall where the heat dissipation hole 45 is located to the direction close to the battery group 2, specifically, the first support section 441 is arranged substantially perpendicular to the main body 43. The second support section 442 is arranged perpendicular to the first support section 441, and the second support section 442 extends to the direction close to the top surface of the battery group 2. The second support portion 44 is integrally configured as a bent hook structure, the first connecting row 34 is clamped between the second support section 442 and the main body 43, and is supported by the first support section 441, so that the first connecting row 34 can be stably fixed on the BMU support 42.

[0056] In a specific embodiment, the first support section 441 is arranged to extend from the wall where the heat dissipation hole 45 is located to the direction close to the battery group 2, which is conducive to integrally forming the main body 43 and the second support portion 44.

[0057] In some embodiments, with continued reference to FIGS. 4-7, two buffer sheets 48 are further arranged between the BMU bracket 42 and the first connecting strip 34, the first connecting strip 34 including opposite first and second surfaces 341, 342, one buffer sheet 48 being arranged between the first surface 341 and the main body 43, and the other buffer sheet 48 being arranged between the second surface 342 and the second support section 442. By arranging the buffer sheets 48 between the BMU bracket 42 and the first connecting strip 34, the first connecting strip 34 is interference-fitted on the BMU bracket 42, so as not to shake.

[0058] In some embodiments, with continued reference to FIGS. 4 and 7, the first connecting strip 34 includes a first connecting section 344, a second connecting section 345 and a third connecting section 346 connected in sequence, the first connecting section 344 being electrically connected to the output end of the negative busbar 32 of the battery pack 2, and the first connecting section 344 and one end of the negative busbar 32 being fixed on the top end surface of the busbar fixing seat 36, the second connecting section 345 being fixed on the BMU bracket 42, and the third connecting section 346 being connected to one end of the fuse 51. The first connecting section 344 is bent relative to the second connecting section 345 to extend to the top end of the end plate 81, and is further bent on the top end surface of the busbar fixing seat 36. The third connecting section 346 is bent relative to the second connecting section 345 towards the fuse 51.

[0059] In the related art, the fuse 51 is usually directly fixed inside the battery box, and the fuse generates heat during operation. If the heat cannot be dissipated in time, it will affect the normal operation of the fuse and its reliability.

[0060] In an embodiment of the present application, as shown in FIGS. 2, 3, 8-12, a heat dissipation structure is arranged between the fuse bracket 52 and the fuse 51, and is used for heat dissipation of the fuse 51. By arranging the heat dissipation structure, the heat generated by the fuse 51 during operation can be dissipated through the heat dissipation structure, so that the fuse 51 can operate normally, and the safety performance of the battery pack is improved.

[0061] In a specific implementation, as shown in FIGS. 8 and 9, the fuse bracket 52 includes a base body 521 and a fixing portion 522 connected vertically, the base body 521 being substantially parallel to the end surface of the battery pack 2, and the fixing portion 522 being parallel to the bottom plate 12. The base body 521 abuts against the end plate 81, and the fixing portion 522 includes two fixing feet 523, each of which is provided with a fixing hole 524 arranged as a bolt through hole so as to fix the fuse bracket 52 on the bottom plate 12.

[0062] The fuse 51 comprises a fuse tube 511, two connecting pieces 512 and two insulating columns 513. The fuse tube 511 is usually made of high-temperature-resistant insulating material, and a fuse body is arranged in the interior of the fuse tube 511. When the current of the circuit connected between the battery pack 10 and the external load is normal, the fuse body allows the current to pass without being fused. When abnormal conditions such as overloading or short circuit occur in the circuit connected between the battery pack 10 and the external load, the current will rapidly increase, thereby generating a large amount of heat, causing the temperature of the fuse body to rapidly rise, reaching the melting point of the fuse body, and the fuse body is fused, thereby disconnecting the circuit connection between the battery pack 10 and the external load. The two connecting pieces 512 are respectively connected to the two ends of the fuse tube 511, and each connecting piece 512 is connected to the base body part 521 of the fuse holder 52 through an insulating column 513.

[0063] The heat dissipation structure is arranged as a heat dissipation interval. In the length direction of the battery pack 10, the length direction of the battery pack 10 is arranged as the X direction shown in FIG. 2, and the first heat dissipation interval 531 is formed between the base body part 521 of the fuse holder 52 and the fuse tube 511 of the fuse 51. In the height direction of the battery pack 10, the height direction of the battery pack 10 is arranged as the Z direction shown in FIG. 2, and the second heat dissipation interval 532 is formed between the bottom end face where the fixing part 522 of the fuse holder 52 is located and the fuse tube 511 of the fuse 51. The heat generated by the fuse tube 511 of the fuse 51 during operation can directly enter the first heat dissipation interval 531 and the second heat dissipation interval 532. Moreover, the fuse 51 is fixed to the bottom plate 12 of the box body 1 through the fuse holder 52, and the bottom plate 12 of the box body 1 is integrated with a liquid cooling plate, so that the heat generated by the fuse 51 can be rapidly exchanged with the bottom plate 12 after being diffused in the first heat dissipation interval 531 and the second heat dissipation interval 532.

[0064] Continuing to refer to FIGS. 8 and 9, the fuse assembly 5 further comprises an insulating sheet 54 fixed to the base body part 521 of the fuse holder 52 and arranged at the bottom of the insulating column 513 of the fuse 51 and the base body part 521 of the fuse holder 52, thereby enhancing the insulation performance of the fuse assembly 5. Specifically, one end of each insulating column 513 is electrically connected to one connecting piece 512 of the fuse 51, and the other end of each insulating column 513 is sequentially arranged through the insulating sheet 54 and the base body part 521 of the fuse holder 51.

[0065] In another embodiment provided in the present application, as shown in FIGS. 10-12, the heat dissipation structure includes a heat conduction support 56 connected to the fuse support 52. The heat conduction support 56 includes a support portion 561 and a heat conduction portion 562 connected to each other, the fuse 51 is fixed to the support portion 561, and the heat conduction portion 562 is provided with a heat conduction cavity 563 in which a heat conduction material is arranged. The heat conduction material can be a heat conduction glue. The support portion 561 is provided with a heat dissipation opening 564 in communication with the heat conduction cavity 563. The heat generated by the fuse 51 fixed to the support portion 561 enters the heat conduction cavity 563 through the heat dissipation opening 564 and is absorbed by the heat conduction material in the heat conduction cavity 563.

[0066] The fuse support 52 includes a base portion 521 and a fixing portion 522 connected vertically, wherein the base portion 521 is substantially parallel to the end face of the battery pack 2, and the fixing portion 522 is parallel to the bottom plate 12. The base portion 521 abuts against the end plate 81, and the fixing portion 522 includes two fixing legs 523, each of which is provided with a fixing hole 524 arranged as a bolt through hole so as to fix the fuse support 52 to the bottom plate 12.

[0067] The support portion 561 of the heat conduction support 56 includes a bottom wall 5611 and a side wall 5612 connected vertically. The bottom wall 5611 is arranged as a curved surface so that the fuse tube 511 of the fuse 51 can be placed on the bottom wall 5611. The heat dissipation opening 564 is arranged at the center of the bottom wall 5611, thereby facilitating the heat generated by the fuse tube 511 of the fuse 51 to be evenly diffused through the heat dissipation opening 564.

[0068] With reference to FIGS. 11 and 12, the bottom wall 5611 further includes a groove 5613, and the heat dissipation opening 564 is located on the bottom surface of the groove 5613, which includes a first portion 5614 and a second portion 5615. The first portion 5614 is arranged close to the heat dissipation opening 564, and the second portion 5615 is arranged away from the heat dissipation opening 564. The first portion 5614 is lower than the second portion 5615, and the fuse 51 is supported on the second portion 5615. By arranging the groove 5613 with the first portion 5614 and the second portion 5615 having different heights on the bottom wall 5611, the groove 5613 is fully adapted to the fuse tube 511 of the fuse 51. It can be understood that the fuse tube 511 is usually arranged as a cylindrical structure, the second portion 5615 with a higher height is arranged to support the two end portions of the fuse 51, and the first portion 5614 with a lower height is arranged to fully accommodate the fuse tube 511, so that the fuse 51 can be stably supported on the bottom wall 5611.

[0069] The first part 5614 with a lower height is close to the heat dissipation opening 564 which is spaced from the heat generating main body 511 of the fuse tube 51, so that the end opening of the heat dissipation opening 564 is not blocked by the fuse tube 511 placed in the groove 5613, thereby affecting the heat dissipation effect.

[0070] The side wall 5612 is fixed to the base body 521 of the fuse holder 52, and the side wall 5612 and the base body 521 of the fuse holder 52 are both provided with perforations. The fuse tube 511 of the fuse 51 is provided with a connecting piece 512 at both ends. One end of each insulating column 513 is electrically connected to the connecting piece 512, and the other end of each insulating column 513 is sequentially arranged through the perforations on the side wall 5612 of the heat conduction holder 56 and the perforations on the base body 521 of the fuse holder 52. Since the heat conduction holder 56 is made of plastic material, the side wall 5612 of the heat conduction holder 56 can further enhance the insulation effect between the insulating column 513 and the fuse holder 52.

[0071] With reference to FIGS. 10-12, the heat conduction part 562 of the heat conduction holder 56 is arranged in a hollow quadrangular prism structure. One end of the heat conduction part 562 is connected to the heat dissipation opening 564 of the bottom wall 5611, and the other end of the heat conduction part 562 is fixed to the bottom plate 12 of the cabinet 1. Since the bottom plate 12 of the cabinet 1 is integrated with a liquid cooling plate structure, the heat generated by the fuse 51 enters the heat conduction cavity 563 through the heat dissipation opening 564, and is fully exchanged with the bottom plate 12 after passing through the heat conduction cavity 563.

[0072] The fixed part 522 of the fuse holder 52 includes two fixed feet 523 arranged at intervals. Each fixed foot 523 is provided with a fixed hole 524 for a bolt to pass through to fix the fuse holder 52 to the bottom plate 12 of the cabinet 1. The heat conduction part 562 passes through the interval between the two fixed feet 523 and abuts against the bottom plate 12.

[0073] In a first aspect, the embodiments of the present application provide a battery pack 10, comprising: a cabinet 1 provided with a receiving cavity 13; a plurality of battery groups 2 arranged in the receiving cavity 13; a fuse assembly 5, the fuse assembly 5 comprising a fuse 51 and a fuse holder 52, the fuse 51 being electrically connected to the plurality of battery groups 2, and the fuse holder 52 fixing the fuse 51; wherein a heat dissipation structure is arranged between the fuse holder 52 and the fuse 51, and the heat dissipation structure is used for heat dissipation of the fuse 51.

[0074] In an embodiment, the heat dissipation structure comprises a heat-conducting support 56, which comprises a first support part 561 provided with a heat dissipation opening 564 and a heat-conducting part 562 connected to the first support part 561 and provided with a heat-conducting cavity in communication with the heat dissipation opening 564; wherein the fuse 51 is supported on a side of the first support part 561 away from the heat-conducting part 562 and opposite the heat dissipation opening 564.

[0075] In an embodiment, the first support part 561 is further provided with a groove 5613, the heat dissipation opening 564 is arranged on a bottom surface of the groove 5613, and the bottom surface of the groove 5613 comprises a first part 5614 close to the heat dissipation opening 564 and a second part 5615 away from the heat dissipation opening 564; wherein the fuse 51 is supported on the second part 5615.

[0076] In an embodiment, the fuse 51 is arranged in a spaced manner with an end surface of the heat dissipation opening 564.

[0077] In an embodiment, the fuse support 52 comprises a base part 521 and a fixing part 522 connected by bending, and the fixing part 522 is fixed on the bottom plate of the box body 1; the first support part 561 of the heat-conducting support 56 comprises a bottom wall 5611 and a side wall 5612 connected by bending, the bottom wall 5611 supports the fuse 51 and is provided with the heat dissipation opening 564 and the groove 5613, and the side wall 5612 is fixed on the base part 521.

[0078] In an embodiment, one end of the heat-conducting part 562 is connected to the heat dissipation opening 564 of the bottom wall 5611, and the other end of the heat-conducting part 562 abuts against the bottom plate of the box body 1.

[0079] In an embodiment, the fixing part 522 of the fuse support 52 comprises two fixing feet 523 fixed on the bottom plate of the box body 1; wherein a space is arranged between the two fixing feet 523, and the other end of the heat-conducting part 562 passes through the space and abuts against the bottom plate of the box body 1.

[0080] In an embodiment, the heat dissipation structure comprises a first heat dissipation space 531 and a second heat dissipation space 532, the fuse support 52 comprises a base part 521 and a fixing part 522 connected by bending, the fixing part 522 is fixed on the bottom plate of the box body 1, the fuse 51 is fixed on the base part 521, along the length direction of the battery pack 10, the first heat dissipation space 531 is arranged between the base part 521 and the fuse 51, and / or, along the height direction of the battery pack 10, the second heat dissipation space 532 is arranged between the bottom end surface of the fixing part 522 and the fuse 51.

[0081] In an embodiment, the fuse 51 includes a fuse tube 511 and two connecting pieces 512 electrically connected to two ends of the fuse tube 511 respectively, and the fuse assembly 5 further includes an insulating piece 54 and two insulating columns 513, the insulating piece 54 is fixed to the base body 521 of the fuse holder 52, one end of each insulating column 513 is connected to one connecting piece 512, and the other end of each insulating column 513 passes through the insulating piece 54 and the base body 521 of the fuse holder 52 in sequence.

[0082] In an embodiment, the BMU assembly 4 is located at one side of the fuse assembly 5, and the connector assembly 7 is located at the other side of the fuse assembly 5, the connector assembly 7 is electrically connected to the BMU assembly 4 and the fuse assembly 5, and the BMU assembly 4, the fuse assembly 5 and the connector assembly 7 are located at the same end of the battery pack 2.

[0083] In an embodiment, the BMU assembly 4 includes a BMU 41 and a BMU holder 42 fixing the BMU 41, the BMU 41 is electrically connected to the plurality of battery packs 2; the battery pack 10 further includes a first connecting row 34 electrically connected between the plurality of battery packs 2 and the fuse 51, and the BMU holder 42 includes a main body 43 and a second supporting body 44 connected to each other, the main body 43 fixes the BMU 41, and the second supporting body 44 supports the first connecting row 34.

[0084] Embodiments of the present application provide a battery pack 10, as shown in FIG. 1, FIG. 13 and FIG. 14, which includes a box 1, a plurality of battery packs 2, an end plate assembly 8, a connecting row assembly 3, a BMU assembly 4, a connector assembly 7, a fuse assembly 5 and a maintenance window assembly 6.

[0085] The box 1 includes an upper box 11 and a bottom plate 12 connected to each other, the height of the upper box 11 is greater than the height of the bottom plate 12, and the battery packs 2 are located in the accommodation space defined by the upper box 11, so that the box 1 is integrally configured to facilitate assembly and later maintenance. The bottom plate 12 is located at the bottom of the battery packs 2, and the bottom plate 12 is integrated with the liquid cooling plate, so that the bottom plate 12 can provide support and heat dissipation for the battery packs 2.

[0086] The plurality of battery packs 2 are arranged in the accommodation space defined by the upper box 11 and the bottom plate 12, and the plurality of battery packs 2 are arranged side by side along a first direction, and each battery pack 2 includes a plurality of batteries 20 arranged side by side along a second direction. The battery 20 can be a cylindrical battery or a square battery. In a specific embodiment, the battery pack 10 internally includes four battery packs 2, and each battery pack 2 includes thirteen batteries 20.

[0087] The end plate assembly 8 includes two end plates 81 and two rectangular steel belts 82 sleeved outside the two end plates 81. One end plate is arranged at each end of each battery pack 2. Each battery pack 2 is fixed by the two end plates 81 and the two rectangular steel belts 82.

[0088] The BMU assembly 4 includes a BMU 41 (battery management unit) and a BMU bracket 42. The BMU 41 is arranged to monitor and manage the state of the battery pack 2, such as monitoring the voltage, current or temperature of the battery, performing balancing control of the battery, preventing overcharging and overdischarging, and communicating with other electrical components inside and outside the battery pack 10, so as to ensure the safe and reliable operation of the battery and prolong the service life of the battery. The BMU bracket 42 is fixed to the bottom plate 12 by bolts. A plurality of fixing holes 46 (as shown in FIG. 5) are arranged on the BMU bracket 42. The BMU 41 is fixed in the fixing holes 46 of the BMU bracket 42 by bolts.

[0089] The connector assembly 7 includes a connector bracket 71, a manual maintenance switch 72 (MSD), a positive high-voltage terminal 73, a negative high-voltage terminal 74, a communication interface 75 and the like. The connector assembly 7 is arranged on the right side of the battery pack 10. The connector bracket 71 is fixed to the bottom plate 12. The manual maintenance switch 72, the positive high-voltage terminal 73, the negative high-voltage terminal 74 and the communication interface 75 are all fixed to the connector bracket 71. The manual maintenance switch 72 is used to manually disconnect the battery circuit when maintenance or fault occurs. The positive high-voltage terminal 73 and the negative high-voltage terminal 74 are used to form a loop with the external high-voltage circuit to realize power transmission. The communication interface 75 is used for data communication with external power supply equipment or system to realize information interaction and monitoring functions.

[0090] The maintenance window assembly 6 includes a maintenance cover plate 61 and an explosion-proof valve 62 connected to the maintenance cover plate. The maintenance cover plate 61 is detachably connected to the upper box body 11. The maintenance cover plate 61 is used to shield the maintenance window. In an embodiment provided in the present application, the maintenance cover plate 61 is used to shield the BMU assembly 4 and the fuse assembly 5. By integrating the explosion-proof valve 62 on the maintenance cover plate 61, the area of the region where the maintenance window is located can be further increased, thereby facilitating maintenance operations.

[0091] The fuse assembly 5 includes a fuse 51, a fuse bracket 52 and an insulating column (not shown in the figure). The fuse bracket 52 is fixed to the bottom plate 12 by bolts. The fuse 51 is fixed to the fuse bracket 52 by the insulating column. The fuse 51 is used to melt in time when the current of the battery pack 10 abnormally rises, thereby protecting the circuit.

[0092] The BMU assembly 4, the fuse assembly 5 and the connector assembly 7 are arranged at the same end of the battery pack 2 along the width direction of the battery pack 10, i.e. the Y direction as shown in FIG. 2, and the fuse assembly 5 is fixed between the BMU assembly 4 and the connector assembly 7.

[0093] The busbar assembly 3 comprises a plurality of positive busbars 31, a plurality of negative busbars 32, a battery-to-battery busbar 33, a first connecting busbar 34 and a second connecting busbar 35, wherein the first connecting busbar 34 is used to electrically connect the output end of the negative busbar 32 and the fuse 51, and the second connecting busbar 35 is used to electrically connect the fuse 51 and the manual maintenance switch 72. Each battery 2 is provided with a positive busbar 31 and a negative busbar 32, the positive busbar 31 is used to electrically connect the positive output ends of the plurality of batteries 20 in the same battery 2, and the negative busbar 32 is used to electrically connect the negative output ends of the plurality of batteries 20 in the same battery 2. The positive busbar 31 and the negative busbar 32 each comprise a plurality of connecting pieces, each connecting piece is used to connect the positive electrode of two adjacent batteries or the negative electrode of two adjacent batteries, and the plurality of batteries 20 in the same battery 2 are connected in series by the busbars. The top end surface of each end plate 81 is provided with a guide groove of the busbar fixing seat 36, the busbar fixing seat 36 is fixed in the guide groove of the end plate 81, and one end of the positive busbar 31 or the negative busbar 32 is fixed to the busbar fixing seat 36 by a bolt.

[0094] In the related art, the first connecting busbar 34 for connecting the fuse 51 and the output busbar 32 of the battery 2 is only fixed at both ends, and in the case of severe vibration of the battery pack 10, the first connecting busbar 34 is prone to be loosened from the battery 2 or the fuse assembly 5, thereby affecting the stability of the electrical connection structure of the first connecting busbar 34.

[0095] In some embodiments of the present application, referring to FIGS. 4, 13 and 14, the BMU support 42 comprises a main body part 43 and a second support part 44 connected together, the main body part 43 is used to fix the BMU 41, and the second support part 44 is used to fix the first connecting busbar 34. By fixing the first connecting busbar 34 to the BMU support 42, the loosening of the first connecting busbar 34 due to the severe vibration of the battery pack 10 can be effectively prevented. Moreover, the BMU and the first connecting busbar 34 are integrated and fixed on the same BMU support 42, which can make the structure inside the battery pack 10 more compact, and is conducive to optimizing the performance of the battery pack 10.

[0096] In some embodiments, referring to FIGS. 4-6, the main body 43 of the BMU holder 42 is configured as a flat structure, two side walls are arranged on both sides of the main body 43, and a bottom wall is connected to the bottom end of the main body 43 and is bolted to the bottom plate 12. Four fixing holes 46 are arranged on the main body 43, two of which are arranged near the top end of the main body 43, and the other two are arranged near the bottom end of the main body 43. The fixing holes 46 are spaced apart from the bottom wall by a sufficient distance, so that the four corners of the BMU 41 are fixed to the four fixing holes 46 by four bolts, and a sufficient heat dissipation space is formed between the BMU 41 and the two side walls and the bottom wall of the main body 43 of the BMU holder 42.

[0097] Continuing to refer to FIGS. 4-6, a heat dissipation structure is arranged on the main body 43 of the BMU holder 42, which includes at least two heat dissipation holes 45 arranged on the main body 43 and a heat dissipation opening 47 arranged at the top end of the main body 43, which is located between the two fixing holes 46. The BMU 41 can be fully cooled through the at least two heat dissipation holes 45 and the heat dissipation opening 47, as well as the space between the BMU 41 and the two side walls and the bottom wall of the BMU holder 42.

[0098] In a specific embodiment, referring to FIGS. 4 and 5, the main body 43 of the BMU holder 42 is provided with two groups of fixing holes 46, one group of fixing holes 46 includes two first fixing holes 461, and the other group of fixing holes 46 includes two second fixing holes 462. The two first fixing holes 461 are arranged at the top end of the main body 43, and the two second fixing holes 462 are arranged near the bottom end of the main body 43. The heat dissipation opening 47 is arranged between the two first fixing holes 461, and the two heat dissipation holes 45 are arranged between the two second fixing holes 462.

[0099] In a specific embodiment, four heat dissipation holes 45 are arranged on the main body 43 of the BMU holder 42, the BMU holder 42 is provided with two second support portions 44, the four heat dissipation holes 45 are divided into two groups, each group is provided with two heat dissipation holes 45, and each second support portion 44 corresponds to a heat dissipation hole 45. In alternative embodiments, two heat dissipation holes are arranged on the main body 43 of the BMU holder 42, and a second support portion 44 is arranged on the heat dissipation hole 45 near the top end of the main body 43.

[0100] In some embodiments, along the length direction of the battery pack, i.e., the X direction as shown in FIG. 2, the second support portion 44 is located on the side of the main body 43 close to the plurality of battery groups 2. It can be understood that the first connecting row 34 needs to be electrically connected to the battery group 2, and arranging the second support portion 44 on the side of the main body 43 close to the battery group 2 is conducive to fixing the first connecting row 34 between the BMU 41 and the battery group 2, thereby making the structure inside the battery pack 10 more compact.

[0101] In a specific implementation, with continued reference to FIGS. 4-7, the second support portion 44 includes a first support segment 441 and a second support segment 442, the first support segment 441 and the second support segment 442 are connected in a bent manner, the first support segment 441 is connected between the main body portion 43 and the second support segment 442, and the first support segment 441 extends from the wall where the heat dissipation hole 45 is located towards the direction close to the battery pack 2, specifically, the first support segment 441 is arranged substantially perpendicular to the main body portion 43. The second support segment 442 is arranged perpendicular to the first support segment 441, the second support segment 442 is connected to an end of the first support segment 441 away from the main body portion 43, and the second support segment 442 extends towards the direction close to the top end surface of the battery pack 2. The second support portion 44 is configured as a bent hook structure as a whole, the first connecting row 34 is clamped between the second support segment 442 and the main body portion 43, and is supported by the first support segment 441, so that the first connecting row 34 can be stably fixed on the BMU support 42.

[0102] In the specific implementation, the first support segment 441 is arranged to extend from the wall where the heat dissipation hole 45 is located towards the direction of the battery pack 2, which is conducive to the integration of the main body portion 43 and the second support portion 44.

[0103] In some embodiments, with continued reference to FIGS. 4-7, at least two buffer pieces 48 are further arranged between the BMU support 42 and the first connecting row 34, the first connecting row 34 includes opposite first and second surfaces 341 and 342, one of the buffer pieces 48 is arranged between the first surface 341 and the main body portion 43, and the other buffer piece 48 is arranged between the second surface 342 and the second support segment 442. By arranging the buffer pieces 48 between the BMU support 42 and the first connecting row 34, the first connecting row 34 is fitted on the BMU support 42 in an interference manner, so as not to shake.

[0104] In some embodiments, with continued reference to FIGS. 4 and 7, the first connecting row 34 includes a first connecting segment 344, a second connecting segment 345 and a third connecting segment 346 connected in a bent manner, the first connecting segment 344 is electrically connected to the output end of the negative busbar 32 of the battery pack 2, and the first connecting segment 344 and one end of the negative busbar 32 are both fixed on the top end surface of the busbar fixing seat 36, the second connecting segment 345 is fixed on the BMU support 42, and the third connecting segment 346 is connected to one end of the fuse 51. The first connecting segment 344 extends to the top end of the end plate 81 after being bent relative to the second connecting segment 345, and is further bent on the top end surface of the busbar fixing seat 36. The third connecting segment 346 is bent relative to the second connecting segment 345 towards the direction close to the fuse 51.

[0105] In the above embodiments provided by the present application, the first connecting strip 34 is used to connect the fuse assembly 5 and the negative bus bar 32 of the battery pack 2. In alternative embodiments, the first connecting strip 34 can also be used to connect the bus bar of the battery pack 2 and other electrical components inside the battery pack, such as a relay or an inverter. In alternative embodiments, the first connecting strip 34 can also be a connecting strip between battery packs 2.

[0106] The embodiments of the present application also provide an energy storage system, which can be an energy storage container or an energy storage battery cabinet. The energy storage system comprises a battery rack and a plurality of battery packs arranged on the battery rack, each battery pack comprising the battery pack provided by the above embodiments.

[0107] In a first aspect, the embodiments of the present application provide a battery pack 10, which comprises: a plurality of battery packs 2, each battery pack 2 comprising a plurality of batteries 20;

[0108] a BMU assembly 4 comprising a BMU 41 and a BMU support 42 for fixing the BMU 41, the BMU 41 being electrically connected to the plurality of battery packs 2;

[0109] a first connecting strip 34, one end of the first connecting strip 34 being electrically connected to the plurality of battery packs 2;

[0110] The BMU support 42 comprises a main body portion 43 and a second support portion 44 connected to each other, the main body portion 43 being used for fixing the BMU 41, and the second support portion 44 being used for fixing the first connecting strip 34.

[0111] In an embodiment, along the length direction of the battery pack 10, the second support portion 44 of the BMU support 42 is located on the side of the main body portion 43 of the BMU support 42 close to the plurality of battery packs 2.

[0112] In an embodiment, the second support portion 44 comprises a first support segment 441 and a second support segment 442 connected by bending, the first support segment 441 connecting between the second support segment 442 and the main body portion 43, and the second support segment 442 extending from the end of the first support segment 441 away from the main body portion 43 towards the direction close to the top of the battery pack 2 and being arranged opposite to the main body portion 43; wherein the first connecting strip 34 is clamped between the second support segment 442 and the main body portion 43 and is supported by the first support segment 441.

[0113] In an embodiment, the main body portion 43 of the BMU support 42 is provided with heat dissipation holes 45, each second support portion 44 is arranged corresponding to a heat dissipation hole 45, and the first support segment 441 of the second support portion 44 extends from the wall where the heat dissipation hole 45 is located towards the direction close to the battery pack 2.

[0114] In an embodiment, the battery pack 10 further comprises a fuse 51 located at one side of the BMU assembly 4, and the first connecting strip 34 is configured to electrically connect the plurality of battery groups 2 and the fuse 51, and the fuse 51 is located at the same end of the battery groups 2 as the BMU assembly 4.

[0115] In an embodiment, the first connecting strip 34 comprises a first connecting section 343, a second connecting section 344 and a third connecting section 345 connected in sequence, the first connecting section 343 is connected to the plurality of battery groups 2, the second connecting section 344 is supported on the BMU support 42, and the third connecting section 345 is connected to the fuse 51, wherein the first connecting section 343 is bent towards the top of the battery groups 2 relative to the second connecting section 344, and the third connecting section 345 is bent towards the fuse 51 away from the end of the plurality of battery groups 2 relative to the second connecting section 344.

[0116] In an embodiment, the battery pack 10 further comprises a buffer sheet 48 arranged between the main body 43 and the second connecting section 344 of the first connecting strip 34, and / or the buffer sheet 48 is arranged between the second connecting section 344 of the first connecting strip 34 and the second support section 442.

[0117] In an embodiment, the battery pack 10 further comprises a box 1, the main body 43 is fixed to the box 1, and a heat dissipation gap is formed between the BMU 41 and the bottom wall 5611 of the main body 43 and / or between the BMU 41 and the two side walls 5612 of the main body 43.

[0118] In an embodiment, the battery pack 10 further comprises a box 1 and a maintenance cover plate 61 connected to the box 1, and the battery pack 10 further comprises an explosion-proof valve 62 arranged on the maintenance cover plate 61, and the maintenance cover plate 61 is arranged to shield the BMU assembly 4 and the fuse 51.

[0119] In a second aspect, the embodiments of the present application provide a power storage system, comprising a plurality of battery packs 10 and a rack for mounting the plurality of battery packs 10, and the battery pack 10 is arranged as the above-described battery pack 10.

Claims

1. A battery pack (10), comprising: a box (1) provided with a receiving cavity (13); a plurality of battery groups (2) arranged in the receiving cavity (13); a fuse assembly (5) comprising a fuse (51) and a fuse support (52), the fuse (51) being electrically connected with the plurality of battery groups (2), and the fuse support (52) fixing the fuse (51); wherein a heat dissipation structure is arranged between the fuse support (52) and the fuse (51), and the heat dissipation structure is used for heat dissipation of the fuse (51).

2. The battery pack (10) of claim 1, wherein, The heat dissipation structure comprises a heat conduction support (56), the heat conduction support (56) comprising a first support part (561) and a heat conduction part (562), the first support part (561) being provided with a heat dissipation opening (564), and the heat conduction part (562) being connected to the first support part (561) and provided with a heat conduction cavity (563) in communication with the heat dissipation opening (564); wherein the fuse (51) is supported on a side of the first support part (561) away from the heat conduction part (562) and opposite to the heat dissipation opening (564).

3. The battery pack (10) of claim 2, wherein, The first support part (561) is further provided with a groove (5613), the heat dissipation opening (564) is arranged on a bottom surface of the groove (5613), and the bottom surface of the groove (5613) comprises a first part (5614) close to the heat dissipation opening (564) and a second part (5615) away from the heat dissipation opening (564); wherein the fuse (51) is supported on the second part (5615).

4. The battery pack (10) of claim 3, wherein, The fuse (51) is arranged in a spaced manner with an end surface of the heat dissipation opening (564).

5. The battery pack (10) of claim 3, wherein, The fuse support (52) comprises a base part (521) and a fixing part (522) connected by bending, and the fixing part (522) is fixed on a bottom plate (12) of the box (1); the first support part (561) of the heat conduction support (56) comprises a bottom wall (5611) and a side wall (5612) connected by bending, the bottom wall (5611) supports the fuse (51) and is provided with the heat dissipation opening (564) and the groove (5613), and the side wall (5612) is fixed on the base part (521).

6. The battery pack (10) of claim 5, wherein, The fuse (51) comprises a fuse tube (511) and two connecting sheets (512) electrically connected to two ends of the fuse tube (511) respectively, and the fuse assembly (5) further comprises two insulating columns (513), one end of each insulating column (513) is connected to the connecting sheet (512), and the other end of each insulating column (513) sequentially penetrates the side wall (5612) of the first support part (561) and the base part (521) of the fuse support (52).

7. The battery pack (10) of claim 5, wherein, One end of the heat conduction part (562) is connected to the heat dissipation opening (564) of the bottom wall (5611), and the other end of the heat conduction part (562) abuts on the bottom plate (12) of the box (1).

8. The battery pack (10) of claim 7, wherein, The fixed part (522) of the fuse holder (52) comprises two fixed feet (523) fixed to the bottom plate (12) of the box (1); wherein a gap is arranged between the two fixed feet (523), and the other end of the heat conduction part (562) penetrates through the gap and abuts against the bottom plate (12) of the box (1).

9. The battery pack (10) according to any one of claims 1-8, wherein, The heat dissipation structure comprises a first heat dissipation gap (531) and a second heat dissipation gap (532), the fuse holder (52) comprises a base part (521) and a fixed part (522) connected by bending, the fixed part (522) is fixed to the bottom plate (12) of the box (1), the fuse (51) is fixed to the base part (521), and a first heat dissipation gap (531) is arranged between the base part (521) and the fuse (51) in the length direction of the battery pack (10), and / or a second heat dissipation gap (532) is arranged between the bottom end face of the fixed part (522) and the fuse (51) in the height direction of the battery pack (10).

10. The battery pack (10) of claim 9, wherein, The fuse (51) comprises a fuse tube (511) and two connecting sheets (512) electrically connected to the two ends of the fuse tube (511) respectively, the fuse assembly (5) further comprises an insulating sheet (54) and two insulating columns (513), the insulating sheet (54) is fixed to the base part (521) of the fuse holder (52), one end of each insulating column (513) is connected to one connecting sheet (512), and the other end of each insulating column (513) penetrates through the insulating sheet (54) and the base part (521) of the fuse holder (52) in sequence.

11. The battery pack (10) according to any one of claims 1-10, wherein, The battery pack further comprises a BMU assembly (4) located at one side of the fuse assembly (5) and a connector assembly (7) located at the other side of the fuse assembly (5), the connector assembly (7) is electrically connected to the BMU assembly (4) and the fuse assembly (5), and the BMU assembly (4), the fuse assembly (5) and the connector assembly (7) are located at the same end of the battery pack (2).

12. The battery pack (10) of claim 11, wherein, The BMU assembly (4) comprises a BMU (41) and a BMU holder (42) for fixing the BMU (41), and the BMU (41) is electrically connected to a plurality of battery packs (2); the battery pack (10) further comprises a first connecting row (34) electrically connected between a plurality of battery packs (2) and the fuse (51), and the BMU holder (42) comprises a main part (43) and a second supporting part (44) connected to each other, the main part (43) fixes the BMU (41), and the second supporting part (44) supports the first connecting row (34).

13. The battery pack of any one of claims 1-10, wherein, The battery pack comprises: a BMU assembly (4) comprising a BMU (41) and a BMU holder (42) arranged to fix the BMU (41), and the BMU (41) is electrically connected to a plurality of battery packs (2); A first connecting row (34) is electrically connected to the plurality of battery groups (2) at one end thereof; The BMU support (42) comprises a main body portion (43) and a second support portion (44) connected to each other, the main body portion (43) is fixed to the BMU (41), and the second support portion (44) supports the first connecting row (34).

14. The battery pack (10) of claim 13, wherein, The second support portion (44) of the BMU support (42) is located on the side of the main body portion (43) close to the plurality of battery groups (2) along the length direction of the battery pack (10).

15. The battery pack (10) of claim 13, wherein, The second support portion (44) comprises a first support segment (441) and a second support segment (442) connected by bending, the first support segment (441) is connected between the second support segment (442) and the main body portion (43), and the second support segment (442) extends from the end of the first support segment (441) away from the main body portion (43) to a direction close to the top of the battery group (2) and is arranged opposite to the main body portion (43); wherein the first connecting row (34) is clamped between the second support segment (442) and the main body portion (43) and is supported by the first support segment (441).

16. The battery pack (10) of claim 15, wherein, The main body portion (43) of the BMU support (42) is provided with a plurality of heat dissipation holes (45), each second support portion (44) is provided with a heat dissipation hole (45) corresponding thereto, and the first support segment (441) of the second support portion (44) extends from the wall where the heat dissipation hole (45) is located to a direction close to the battery group (2).

17. The battery pack (10) of claim 15, wherein, A fuse (51) is further arranged on one side of the BMU assembly (4), the first connecting row (34) is arranged to electrically connect the plurality of battery groups (2) and the fuse (51), and the fuse (51) and the BMU assembly (4) are located at the same end of the battery group (2).

18. The battery pack (10) of claim 17, wherein, The first connecting row (34) comprises a first connecting segment (343), a second connecting segment (344) and a third connecting segment (345) connected in sequence, the first connecting segment (343) is connected to the plurality of battery groups (2), the second connecting segment (344) is supported by the BMU support (42), and the third connecting segment (345) is connected to the fuse (51); wherein the first connecting segment (343) is bent relative to the second connecting segment (344) to be close to the top of the battery group (2), and the third connecting segment (345) is bent relative to the second connecting segment (344) to be close to the fuse (51) away from the end of the plurality of battery groups (2).

19. The battery pack (10) of claim 18, wherein, A buffer sheet (48) is further arranged between the main body portion (43) and the second connecting segment (344) of the first connecting row (34); And / or, the buffer sheet (48) is arranged between the second connecting segment (344) of the first connecting row (34) and the second support segment (442).

20. The battery pack (10) according to any one of claims 13-19, wherein, The battery pack (10) further comprises a box (1), the main body part (43) is fixed to the box (1), and a heat dissipation gap is formed between the BMU (41) and the bottom wall (5611) of the main body part (43) and / or between the BMU (41) and the two side walls (5612) of the main body part (43).

21. The battery pack (10) of any of claims 17-19, wherein, The battery pack (10) further comprises a box (1) and a maintenance cover plate (61) connected to the box (1), and further comprises an explosion-proof valve (62) arranged on the maintenance cover plate (61), and the maintenance cover plate (61) is arranged to shield the BMU assembly (4) and the fuse (51).

22. An energy storage system, the energy storage system comprising a plurality of battery packs (10) and a battery rack arranged to mount the plurality of battery packs (10), the battery packs (10) being arranged as the battery pack (10) of any one of claims 1-21.

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