CN211238346U

CN211238346U - Battery cell support, battery case and balance car

Info

Publication number: CN211238346U
Application number: CN202020106744.2U
Authority: CN
Inventors: 臧传美
Original assignee: Zhejiang Aerlang Technology Co Ltd
Current assignee: Zhejiang Aerlang Technology Co Ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-08-11
Anticipated expiration: 2030-01-17

Abstract

The utility model discloses an electricity core support, battery case and balance car for install electric core, be provided with a plurality of portions of holding that are used for holding electric core tip on the electricity core support, each portion of holding sets up side by side on the electricity core support. The utility model discloses an electricity core support, battery case and balance car to the mode that adopts among the prior art to bind or paste, and electric core is fixed to this technical scheme adoption electricity core support. Connect stably, avoided the battery to connect not hard up and connect the phenomenon of disconnection, improved the operation experience of balance car.

Description

Battery cell support, battery case and balance car

Technical Field

The utility model relates to an electricity core support, battery case and balance car.

Background

At present such as precious battery charges, the balance car battery adopts the mode of multisection electricity core series-parallel connection to make up into the group battery, and the mode of adopting to bind between electricity core and the electricity core or the mode of pasting are fixed, leads to fixed insecure, can lead to the phenomenon that the connection of battery is not hard up or even disconnect-connected at the in-process that shakes or remove, causes the power loss of balance car, reduces the operation experience of balance car.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an electricity core support, battery case and balance car can solve the prior art defect, realizes through following technical scheme:

the utility model provides an electricity core support for install electric core, be provided with a plurality of accommodation portions that are used for holding electric core tip on the electricity core support, each accommodation portion sets up side by side on the electricity core support. Through above-mentioned technical scheme, to adopting the mode of binding or pasting among the prior art, this technical scheme adopts electric core support to fix electric core. Connect stably, avoided the battery to connect not hard up and connect the phenomenon of disconnection, improved the operation experience of balance car.

As a further improvement, the electric core support includes first connecting plate, second connecting plate and third connecting plate, and the upper end of second connecting plate is connected to the front end or the rear end of first connecting plate, and the front end or the rear end of third connecting plate are connected to the lower extreme of second connecting plate, and first connecting plate and third connecting plate are in the same one side of second connecting plate, set up a plurality of first arc depressed parts on the first connecting plate, set up the second arc depressed part of equal quantity on the second connecting plate, and the space between the corresponding first arc depressed part in position and the second arc depressed part constitutes the holding portion. Through above-mentioned technical scheme, the setting up of portion of holding makes can fix electric core after the installation of electric core, has prevented that electric core from the balance car in-process and the removal that brings, has reduced fracture and not hard up risk.

As a further improvement of the present invention, it is adjacent that there is a first protrusion between the first arc-shaped concave portions, it is adjacent that there is a second protrusion between the second arc-shaped concave portions, and there is a gap between the first protrusion and the second protrusion corresponding to each other in position. By adopting the technical scheme, the battery cell bracket is provided with a gap, so that the battery cell can be conveniently mounted and dismounted.

As a further improvement of the present invention, the second connecting plate has a through hole formed between each of the first arc-shaped recessed portions and the second arc-shaped recessed portions. By adopting the technical scheme, the connecting plate of the battery cell support is provided with the through hole at the end part of the battery cell, so that the busbar can be conveniently arranged to connect the positive electrode and the negative electrode of the battery cell, and the battery cell can normally work.

The utility model also provides a battery box, including first lid, second lid, more than one electric core subassembly, protection circuit board, the joint that charges and the joint that discharges, the electric core subassembly by a plurality of electric cores with install at electric core tip as any of the claim electric core support constitute, the electric core passes through the busbar and connects the protection circuit board, first lid passes through fastener and second lid fixed connection, the electric core subassembly and protection circuit board are installed in the cavity that first lid and second lid formed, the joint that charges is installed on the second lid and is connected with protection circuit board, the joint that discharges is installed on first lid and is connected with protection circuit board. Through above-mentioned technical scheme, to adopting the mode of binding or pasting among the prior art, this technical scheme adopts electric core support to fix electric core, connects stably, has reduced the phenomenon that the battery is connected not hard up and disconnect, has improved the operation experience of balance car.

As a further improvement, the lower surface of first lid is provided with the round downwards protrudingly and is used for leaning on the bulge of electric core subassembly, the second lid includes the bottom plate and is located bottom plate curb plate all around, be provided with a plurality of support piece of the sheet structure of upwards extending and stop the strip on the bottom plate, support piece sets up side by side along the length direction of electric core support, each support piece top undercut ground be equipped with a plurality of with in the electric core subassembly the arc wall that electric core matches, stop the strip setting and parallel with outer fringe support piece in the one end of electric core subassembly, protection circuit board is located the top of electric core subassembly. Through above-mentioned technical scheme, setting up of bulge can make battery case lid can compress tightly electric core after making the installation, make full use of the inner space, support piece and stop the strip and prevented that electric core from going the in-process and the removal that brings at the balance car, reduced fracture and not hard up risk.

As a further improvement, be provided with on the first lid and hold platform, counter sink, spacing groove and mounting groove one, hold the platform protruding in the middle part position of upper surface, the spacing groove sets up in the one side that holds the platform, it sets up to hold a opposite side mounting groove one, the counter sink set up in hold a peripheral edge and first lid peripheral edge between, be equipped with in the mounting groove one and be used for the through-hole one that discharge joint exposes, the position that corresponds with the counter sink on the second lid is provided with the spliced pole, the spliced pole is equipped with the screw hole, and fastener accessible counter sink, spliced pole are connected first lid and second lid. Through adopting above-mentioned technical scheme, the battery case passes through the discharge joint and supplies power for the balance car, has set up on the first lid with the fixed part of second lid cooperation.

As a further improvement, the lower surface of first lid is provided with joint spare one and block portion one, the second lid is provided with joint spare two and block portion two, joint spare one is located first lid inside wall to connect perpendicularly with the lower surface of first lid, joint spare two set up with on the curb plate of the corresponding second lid of joint spare, block portion one is located on the lateral wall of first lid to protrusion in first lid lateral wall lower surface, block portion two-way epirelief are in the upper surface of second lid curb plate, first lid and second lid close the back, joint spare two with joint spare one forms the joint and connects, block portion one with block portion two blocks are connected. Through adopting above-mentioned technical scheme, make the battery case fastening through the connection of joint spare and block portion, guaranteed the stability of battery case in the use.

As a further improvement, the battery case includes the electric core subassembly that sets up side by side around two, and the electric core rear end of front row electric core subassembly is connected through the busbar with the electric core front end of back row electric core subassembly, the interval is provided with four support piece on the bottom plate, and two support piece support are used to every electric core of electric core subassembly, and the inboard of the curb plate that corresponds with support piece is provided with the reinforcing plate, and the inboard of reinforcing plate is provided with the outside electric core matched with arc wall with the electric core subassembly, stop the left and right sides that the strip set up the edge at the edge of second lid rear side, first lid is fixed back with the second lid, the bulge of first lid supports and leans on the upside of electric core subassembly. Through adopting above-mentioned technical scheme, the battery case is to the further fixed of electric core, and connection that electric core can be stable in the battery case has reduced the phenomenon of not hard up or disconnection appearing at the balance car in the use.

The utility model also provides a balance car, still include the balance car casing, in the battery case installation balance car casing. Through adopting above-mentioned technical scheme, electric core is stable for the balance car power supply, and the battery case set up the phenomenon that has reduced battery connection not hard up and disconnect simultaneously, has improved the operation experience of balance car.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view of a battery holder provided in embodiment 1 of the present invention.

Fig. 2 is a schematic view of a battery box according to embodiment 2 of the present invention.

Fig. 3 is an exploded schematic view of the battery case of fig. 2.

Fig. 4 is a schematic structural view of the upper surface of the first cover in fig. 3.

Fig. 5 is a schematic view showing the mounting position of the discharge connector of the battery case.

Fig. 6 is a schematic structural view of the lower surface of the first cover in fig. 3.

Fig. 7 is a partially enlarged view of the lower surface of the first cover in fig. 6.

Fig. 8 is a schematic structural view of the second cover in fig. 2.

Fig. 9 is a partially enlarged schematic view of the second cover of fig. 8.

Fig. 10 is a schematic structural view of the electric core assembly of fig. 3.

In the figure: a battery case 1; a first cover 11; an accommodating table 111; a counterbore 112; a limiting groove 113; a first mounting groove 114; a first through hole 115; a first mating member 116; a second mounting groove 1161; a first clamping piece 117; the projection 118; a first engaging portion 119; a reinforcing rib 1112; a second cover 12; a bottom plate 121; side plates 122; a support 123; an arc-shaped slot 1231; a barrier rib 124; a connecting post 125; a second clamping piece 126; a second fitting member 127; a second through hole 1271; a reinforcing plate 129; a second engaging portion 128; an electric core assembly 13; a cell support 131; a first connection plate 1311; a second connecting plate 1312; a third connecting plate 1313; a first arcuate recess 1314; a first projection 1315; a second arcuate recess 1316; second projection 1317; a cell housing section 1318; a third through hole 1319; a cell 132; a protection circuit board 14; a charging connector 15; a discharge connection 16.

Detailed Description

To further illustrate the technical means and effects of the present invention, the following embodiments of the present invention will be described in detail with reference to the accompanying drawings and the preferred embodiments, in order to further explain the present invention.

Example 1

As shown in fig. 1, the present invention provides a battery cell support 131, wherein the battery cell connecting frame 131 comprises a first connecting plate 1311, a second connecting plate 1312, and a third connecting plate 1313, the first connecting plate 1311 is a connecting plate on the upper side of the battery cell support 131, the third connecting plate 1313 is a connecting plate on the lower side of the battery cell support 131, the front end of the first connecting plate 1311 is connected to the upper end of the second connecting plate 1312, the lower end of the second connecting plate 1312 is connected to the front end of the third connecting plate 1313, the first connecting plate 1311 and the third connecting plate 1313 are both substantially in a wave shape, the second connecting plate 1312 is in a flat plate shape, specifically, the first connecting plate 1311 is provided with a plurality of upwardly concave first arc recesses 1314, a plurality of downwardly concave first protrusions 1315 are provided between adjacent first arc recesses 1314, the third connecting plate 1313 is provided with a plurality of downwardly concave second arc recesses 1316, the positions of the second arc recesses 1316 correspond to the positions of the first arc recesses 1314, the number of the corresponding first arc-shaped recess 1314 and the space between the second arc-shaped recess 1316 form a cell accommodating part 1318 for accommodating the end of the corresponding cell. An upward second protruding part 1317 is arranged between every two adjacent second arc-shaped recessed parts 1316, a gap is formed between the first protruding part 1315 and the second protruding part 1317, so that the distance between the first connecting plate 1311 and the third connecting plate 1313 is variable, and therefore the battery cell can be conveniently mounted and dismounted, a through hole three 1319 is formed in the second connecting plate 1312 between the first arc-shaped recessed part 1314 and the second arc-shaped recessed part 1316 corresponding to each position, the size of the through hole three 1319 is smaller than that of the battery cell, and the through hole three 1319 facilitates connection of a conductive bar and the battery cell.

Example 2

As shown in fig. 2 to 8, the utility model provides a battery box 1, including first lid 11, second lid 12, electric core subassembly 13, protection circuit board 14, the joint 15 that charges and discharge joint 16, first lid 11 passes through mounting and second lid 12 fixed connection, form the cavity that is used for holding electric core subassembly 13 after first lid 11 and the 12 lid of second lid are closed, electric core subassembly 13 connects protection circuit board 14, electric core subassembly 13 and protection circuit board 14 are installed in the cavity that first lid 11 and second lid 12 formed, the joint 15 that charges is installed on second lid 12, discharge joint 16 is installed on first lid 11. In this embodiment, the first cover is an upper cover of the battery box, and the second cover is a lower cover of the battery box. In other embodiments, the first cover may be a lower cover of the battery case, and the second cover may be an upper cover of the battery case.

As shown in fig. 3, 4 and 5, the first cover 11 is substantially rectangular, and the upper surface of the first cover 11 includes a receiving platform 111, a counter-sunk hole 112, a limiting groove 113 and a first mounting groove 114. The accommodating table 111 is rectangular and protrudes upwards from the middle of the upper surface of the first cover body 11, a plurality of counter bores 112 for accommodating fixing pieces are arranged on the surfaces between the left edge and the right edge of the accommodating table 111 and the peripheral edge of the battery case upper cover 11, a limiting groove 113 is formed in the middle of the front edge of the accommodating table 111, the limiting groove 113 is used for balancing the mounting limit of the vehicle case, a first mounting groove 114 for mounting the discharging connector 16 is formed in the middle of the rear edge of the accommodating table 111, and a first through hole 115 for exposing the discharging connector 16 out of a connecting line is formed in the bottom of the first mounting groove 114. A first matching piece 116 which is used for being matched and installed with the second cover body 12 extends outwards from the middle position of the lower edge of the first cover body 11, the first matching piece 116 is rectangular, and a second installation groove 1161 is formed in the bottom of the first matching piece 116 upwards.

As shown in fig. 5, 6 and 7, the lower surface of the first cover 11 includes a first snap-in element 117, a protruding portion 118, a first engaging portion 119 and a rib 1112. Joint spare 117 is established at the inside wall of first lid 11 front side edge and is close to both sides about the intermediate position, joint spare 117 is roughly the rectangle slice, and the first lid 11 lower surface of perpendicular to, the top and the first lid 11 lower surface of joint spare 117 are connected, preceding lateral wall first half is connected with first lid 11 front side wall, joint spare 117 is equipped with the aperture that is used for with second lid 12 fixed connection near the position of lower limb, first lid 11 lower surface is equipped with the round and is used for leaning on the bulge 118 of electric core subassembly 13, be equipped with the strengthening rib 1112 that is used for strengthening first lid intensity between the lateral wall all around of bulge 118 and the first lid 11 lateral wall all around, first lid 11 extends the round downwards along the inside wall and is used for first 119 with second lid 12 complex block portion, first 119 of block portion downwardly protruded in the lower surface of the lateral wall of first lid 11. In other embodiments, a foam cushion or a collodion cushion can be arranged between the battery cell assembly 13 and the battery box cover body as a cushion pad to reduce the impact of the shell on the battery cell or fix the connecting wire. In other embodiments, the first cover 11 may not be provided with the rib 1112.

As shown in fig. 8, the second cover 12 includes a bottom plate 121, a side plate 122, a support member 123, a stop bar 124, a connecting column 125, a second snap-in member 126, a second fitting member 127 and a reinforcing plate 129.

As shown in fig. 8 and 9, the bottom plate 121 of the second cover 12 has side plates 122 extending upward from the peripheral edge, the supporting members 123 extend upward along the bottom plate 121 to form an elongated structure, the supporting members 123 are disposed along the left-right direction of the second cover 12, that is, along the length direction of the second cover 12, the number of the supporting members 123 is four, and the four supporting members 123 are disposed in parallel in the front-back direction. The supporting members 123 are provided with a plurality of arc-shaped slots 1231 from top to bottom, and the arc-shaped slots 1231 of the supporting members 123 are aligned in the front-back direction (width direction). The arc-shaped groove 1231 is used for supporting and placing the electric core assembly 13. The stop strips 124 are disposed on the left and right sides near the rear edge of the second cover 12, and have a substantially sheet-like structure, and extend upward from the bottom plate to limit the forward and backward sliding of the electric core assembly 13 after installation. The connecting posts 125 are located near the peripheral edge of the second cover 12, the number of the connecting posts is the same as that of the counter bores 112 of the first cover 11, and the connecting posts 125 are provided with threaded holes for matching with the counter bores 112 to enable screws to be screwed into the upper cover and the lower cover of the fixed battery box. The second clamping member 126 is located on the inner wall of the front side plate 122 of the second cover 12 and close to the left side and the right side of the middle position, the second clamping member 126 is in a triangular tooth-shaped structure and corresponds to the first clamping member 117 of the first cover 11, and after the upper cover and the lower cover of the battery box are fixedly connected, the second clamping member 126 is clamped in a small hole of the first clamping member 117. The second mating member 127 is formed by extending outward from the middle position of the side plate 122 at the rear side of the second cover body 12, the second mating member is substantially rectangular, a hollow groove is formed in the middle, after the upper cover and the lower cover of the battery box are fixed, the second mating member 127 is buckled in the second mounting groove 1161 of the first mating member 116, a second through hole 1271 is formed in the center position of the outer side wall of the second mating member 127, and the second through hole 1271 is used for enabling the charging connector 15 to be inserted into and connected with the protection circuit board 14 inside the. The side plate 122 of the second cover 12 is provided with a plurality of reinforcing plates 129 for reinforcing the strength of the second cover, the reinforcing plates 129 are in a sheet structure, the side plate 122 of the second cover 12 is provided with a second engaging portion 128 along the top of the outer side, the second engaging portion 128 protrudes upwards from the upper surface of the side plate 122 of the second cover 12, and the second engaging portion 128 is used for being matched with the first engaging portion 119 of the first cover 11. In other embodiments, the second engaging portion 128 may be a ring-shaped groove for engaging with the first protruding engaging portion 119, or the first engaging portion 119 may be a ring-shaped groove for engaging with the second protruding engaging portion. In other embodiments, the supporting members 123 may be disposed side by side in the width direction of the battery case, i.e., the front-rear direction of the battery case. The blocking strip may be disposed near the front, left, or right side of the second cover body 12 according to the disposition direction of the supporting member 123.

As shown in fig. 10, a set of cell assemblies 13 includes two cell supports 131 and a plurality of cells 132 as described in the foregoing embodiment, the cell supports 131 are installed at the positive and negative ends of the cells 132, in this embodiment, two sets of cell assemblies 13 are adopted, a plurality of conductive strips are arranged on the two sets of cell assemblies 13 and connected, the conductive strips are in a strip structure and made of a metal material with good conductivity, the conductive strips are arranged outside the cell supports 131 and attached to the positive and negative ends of the cells 132 through three through holes 1319, and the conductive strips are connected to the protection circuit board 14 through a circuit. In other embodiments, the electric core assembly 13 can also be used in one group or more than two groups according to the type of the balance car.

In this embodiment, "front" of the "front side" is a forward direction of the balance car, "rear" of the "rear side" is a backward direction of the balance car, and "left and right" is a left and right direction of the balance car.

Example 3

A balance car is provided with the battery box, and further comprises a balance car shell, a wheel and a steering device, wherein the wheel is provided with an in-wheel motor, the battery box is connected with the in-wheel motor of the wheel arranged on the balance car shell through a line for supplying power, and the steering device is arranged on the balance car shell and is connected with a circuit board through a line.

During the use, the start power, the electric core subassembly 13 passes through the discharge joint connection control panel that the battery case circuit board is connected and rotates in order to carry current drive wheel to the in-wheel motor of wheel, turns to the device through trampling the touch-control on the balance car and come the control direction, and electric core subassembly 13 prevents electric core back-and-forth movement through support piece 123 and the stop strip 124 of electric core support 131 and battery case, has avoided electric core because the trouble such as outage that the removal caused easily. When charging, the current is transmitted to the electric core component 13 through the charging connector.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments that do not depart from the technical scope of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a battery cell support for install electric core (132), its characterized in that is provided with a plurality of electric core portions of holding (1318) that are used for holding electric core (132) tip on battery cell support (131), and each electric core portion of holding (1318) sets up side by side on battery cell support (131).

2. The cell support according to claim 1, wherein the cell support (131) comprises a first connecting plate (1311), a second connecting plate (1312) and a third connecting plate (1313), wherein the front end or the rear end of the first connecting plate (1311) is connected to the upper end of the second connecting plate (1312), the lower end of the second connecting plate (1312) is connected to the front end or the rear end of the third connecting plate (1313), the first connecting plate (1311) and the third connecting plate (1313) are located on the same side of the second connecting plate (1312), the first connecting plate (1311) is provided with a plurality of first arc-shaped recesses (1314), the third connecting plate is provided with an equal number of second arc-shaped recesses (1316), and the space between the first arc-shaped recesses (1314) and the second arc-shaped recesses (1316) corresponding in position forms the cell accommodating portion (1318).

3. The cell holder of claim 2, wherein adjacent first arc-shaped recesses (1314) have a first protrusion (1315) therebetween, adjacent second arc-shaped recesses (1316) have a second protrusion (1317) therebetween, and correspondingly positioned first and second protrusions (1315, 1317) have a gap therebetween.

4. The cell support according to claim 2, wherein a third through hole (1319) is formed in the second connecting plate (1312) between the first arc-shaped recess (1314) and the second arc-shaped recess (1316) corresponding to each position, and the size of the third through hole (1319) is smaller than that of the cell.

5. A battery box is characterized by comprising a first cover body (11), a second cover body (12), more than one electric core assembly (13), a protective circuit board (14), a charging joint (15) and a discharging joint (16), the battery core assembly (13) is composed of a plurality of battery cells (132) and the battery cell bracket (131) which is arranged at the end part of the battery cells (132) and is described in any one of claims 1-4, the battery cell (132) is connected with the protective circuit board (14) through a conductive strip, the first cover body (11) is fixedly connected with the second cover body (12) through a fastener, the electric core assembly (13) and the protective circuit board (14) are arranged in a cavity formed by the first cover body (11) and the second cover body (12), the charging connector (15) is arranged on the second cover body (12) and is connected with the protection circuit board (14), the discharge connector (16) is mounted on the first cover body (11) and connected with the protection circuit board (14).

6. A battery box as defined in claim 5, wherein the lower surface of said first lid (11) is provided convexly downward with a ring of projections (118) for abutting against the cell assembly (13), the second cover body (12) comprises a bottom plate (121) and side plates (122) positioned on the periphery of the bottom plate, a plurality of supporting pieces (123) and blocking strips (124) of upwards extending sheet structures are arranged on the bottom plate (121), the supporting pieces (123) are arranged side by side along the length direction of the battery cell bracket (131), the top of each supporting piece (123) is provided with a plurality of arc-shaped grooves (1231) which are matched with the battery cells (132) in the battery cell assembly (13) in a downward sunken way, the stop strip (124) is arranged at one end of the electric core assembly (13) and is parallel to the outer edge support piece (123), and the protective circuit board (14) is positioned above the electric core assembly (13).

7. The battery pack according to claim 6, wherein the first cover (11) is provided with a receiving platform (111), a counter bore (112), a restraining groove (113), and a first mounting groove (114), the receiving platform (111) protrudes from the middle of the upper surface, the restraining groove (113) is disposed at one side of the receiving platform (111), the other side of the accommodating platform (111) is provided with a first mounting groove (114), the counter sink (112) is arranged between the peripheral edge of the accommodating platform (111) and the peripheral edge of the first cover body (11), a first through hole (115) for exposing the discharge connector (16) is arranged in the first mounting groove (114), a connecting column (125) is arranged on the second cover body (12) corresponding to the counter sink (112), the connecting column (125) is provided with a threaded hole, and the first cover body (11) and the second cover body (12) can be connected through the counter sink (112) and the connecting column (125) by fasteners.

8. The battery box according to claim 6, wherein the lower surface of the first cover (11) is provided with a first clamping member (117) and a first clamping portion (119), the second cover (12) is provided with a second clamping member (126) and a second clamping portion (128), the first clamping member (117) is positioned on the inner side wall of the first cover (11) and is vertically connected with the lower surface of the first cover (11), the second clamping member (126) is positioned on the side plate (122) of the second cover (12) corresponding to the first clamping member (117), the first clamping portion (119) is positioned on the side wall of the first cover (11) and protrudes out of the lower surface of the side wall of the first cover (11), the second clamping portion (128) protrudes upwards from the upper surface of the side plate (122) of the second cover (12), and after the first cover (11) and the second cover (12) are closed, the second clamping member (126) and the first clamping member (117) form a clamping connection, the first clamping part (119) is clamped and connected with the second clamping part (128).

9. A battery box as claimed in claim 6, wherein said battery box comprises two cell assemblies (13) arranged side by side in front and back, the rear ends of the cells of the front row of cell assemblies (13) are connected with the front ends of the cells of the rear row of cell assemblies (13) by means of conductive bars, four supporting pieces (123) are arranged on the bottom plate (121) at intervals, the battery cell of each battery cell assembly (13) is supported by two supporting pieces (123), the inner side of the side plate (122) corresponding to the support piece (123) is provided with a reinforcing plate (129), the inner side of the reinforcing plate (129) is provided with an arc-shaped groove matched with the outer cell of the cell assembly (13), the barrier strips (124) are arranged at the left side and the right side close to the rear side edge of the second cover body (12), after the first cover body (11) and the second cover body (12) are fixed, the bulge part (118) of the first cover body (11) abuts against the upper side of the electric core assembly (13).

10. A balance car comprising a battery pack according to any one of claims 5 to 9, further comprising a balance car housing, said battery pack being mounted in the balance car housing.