Battery structure and moped

Abstract

The battery structure comprises a shell assembly and a battery assembly arranged in a closed space of the shell assembly, the battery assembly comprises a battery cell group, and the battery cell group comprises a first battery cell group and a second battery cell group which are connected in parallel. The first battery cell group comprises a plurality of first battery cells which are stacked along the longitudinal direction and are distributed in series in an S shape, and the second battery cell group comprises a plurality of second battery cells which are stacked along the longitudinal direction and are distributed in series in an S shape. Therefore, according to the battery structure, by optimizing the series-parallel connection mode, the wiring path is shortened, the maintenance is more convenient, and meanwhile, the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle batteries, in particular to a battery structure and a power-assisted vehicle. Background Art

[0002] The battery stacking methods commonly used in existing power-assisted bicycles are mainly divided into horizontal stacking and vertical stacking. For the horizontal stacking method, the protection board and the collection board are made into an integral arrangement on the large-size plane formed by the battery module, resulting in the positive and negative poles of the battery module being far apart. Not only is the wiring path long, but the wiring harness is also difficult to fix, and the subsequent maintenance costs are high. For the vertical stacking method, the connecting pieces between the battery cells need to be bent, which makes assembly difficult, easy to break, and difficult to repair. For this reason, there is an urgent need for a battery structure with a reliable connection method and easy maintenance. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a battery structure and a power-assisted bicycle, which make the battery structure maintenance more convenient and cost-effective through a reliable battery cell series-parallel connection method.

[0004] In a first aspect, an embodiment of the utility model provides a battery structure, which includes: a shell assembly, which forms a closed space; and a battery assembly, which is arranged in the closed space of the shell assembly and includes a cell group, the cell group includes a first cell group and a second cell group connected in parallel, the first cell group includes a plurality of first cells stacked longitudinally and distributed in series in an S shape, and the second cell group includes a plurality of second cells stacked longitudinally and distributed in series in an S shape.

[0005] In some embodiments, the battery assembly further includes: a protection plate bracket, which is disposed at the lower end of the battery cell group; and a protection plate, which is disposed in the protection plate bracket and is electrically connected to the battery cell group.

[0006] In some embodiments, the battery assembly further includes: a plurality of nickel sheet groups, the plurality of nickel sheet groups are arranged in a longitudinal direction, and a plurality of the first battery cells and a plurality of the second battery cells are disposed between each of the nickel sheet groups.

[0007] In some embodiments, the nickel sheet group includes: a first nickel sheet layer, the first nickel sheet layer protrudes outward to form a plurality of first series welding parts, and the first series welding parts are provided with first through holes; and a second nickel sheet layer, the second nickel sheet layer protrudes outward to form a plurality of second series welding parts, the positions of the second series welding parts match the positions of the first series welding parts, and the second series welding parts are provided with second through holes, and the positions of the second through holes are staggered with the positions of the first through holes.

[0008] In some embodiments, the battery assembly further includes: a plurality of bracket groups, the plurality of bracket groups are connected in sequence along the longitudinal direction, and a plurality of the first battery cells and a plurality of the second battery cells are provided between each of the bracket groups.

[0009] In some embodiments, the bracket group is convex toward the outside to form a plurality of abutting portions and a plurality of wiring portions, the abutting portions and the wiring portions are in contact with the housing assembly, and a wiring groove is formed in the wiring portion.

[0010] In some embodiments, the housing assembly includes: an aluminum cylinder, both ends of the aluminum cylinder are open and the battery assembly is disposed inside; an upper end cover, the upper end cover closes the upper end of the aluminum cylinder, and a charging plug is provided on the upper end cover; and a lower end cover, the lower end cover closes the lower end of the aluminum cylinder, and a discharge plug is provided on the lower end cover.

[0011] In some embodiments, an electronic tag is further provided on the upper end cover.

[0012] In some embodiments, a water inlet detection board is further provided on the lower end cover.

[0013] In some embodiments, the battery assembly further includes: a temperature sensor, and the temperature sensor is configured to detect the temperature of the battery cell group.

[0014] In a second aspect, an embodiment of the present invention further provides a power-assisted vehicle, and the power-assisted vehicle includes: the battery structure as described in the first aspect.

[0015] An embodiment of the present invention provides a battery structure and a power-assisted vehicle. The battery structure includes a housing assembly and a battery assembly disposed in a closed space of the housing assembly. The battery assembly includes a battery cell group, and the battery cell group includes a first battery cell group and a second battery cell group connected in parallel. The first battery cell group includes a plurality of first battery cells stacked along the longitudinal direction and distributed in an S-shaped series, and the second battery cell group includes a plurality of second battery cells stacked along the longitudinal direction and distributed in an S-shaped series. Thus, by optimizing the series-parallel connection method, the battery structure realizes shortening the wiring path and making maintenance more convenient, and at the same time helps to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features and advantages of the present invention will become more clear. In the drawings:

[0017] Figure 1 is a schematic diagram of the battery structure provided by an embodiment of the present invention;

[0018] Figure 2 is an exploded view of the battery structure provided by an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a battery assembly provided by an embodiment of the present utility model;

[0020] Figure 4 is a partial schematic diagram of a battery assembly provided by an embodiment of the present utility model;

[0021] Figure 5 is a schematic diagram of a lower end cover provided by an embodiment of the present utility model;

[0022] Figure 6 is a schematic diagram of an upper end cover provided by an embodiment of the present utility model.

[0023] Explanation of reference numerals:

[0024] 1 - housing assembly; 11 - aluminum cylinder; 12 - upper end cover; 121 - charging plug; 122 - electronic tag; 123 - latch; 13 - lower end cover; 131 - discharging plug; 132 - water inlet detection board; 2 - battery assembly; 21 - cell group; 211 - first cell group; 2111 - first cell; 212 - second cell group; 2121 - second cell; 22 - protection board bracket; 23 - protection board; 24 - nickel sheet group; 241 - first nickel sheet layer; 2411 - first series welding part; 2412 - first through hole; 242 - second nickel sheet layer; 2421 - second series welding part; 2422 - second through hole; 25 - bracket group; 251 - abutting part; 252 - wiring part; 2521 - wiring groove; 253 - first bracket; 254 - second bracket; 26 - temperature sensor; 27 - long screw. Detailed implementation manners

[0025] The following describes the present application based on embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these detail parts. In order to avoid obscuring the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0026] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0027] Unless otherwise clearly defined or limited, the terms "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] For ease of explanation, spatially relative terms such as "inner", "outer", "beneath", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, the element described as "below" or "beneath" another element or feature will then be positioned "above" that other element or feature. Thus, the exemplary term "below" can encompass both the orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptive terms used herein should be interpreted accordingly.

[0029] Unless the context clearly requires otherwise, the words such as "include", "comprise" and similar words throughout the application shall be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0030] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0031] Figure 1 is a schematic diagram of the battery structure provided by an embodiment of the present utility model, Figure 2 is an exploded view of the battery structure provided by an embodiment of the present utility model, combined with Figure 1 and Figure 2 as shown, the battery structure includes a housing assembly 1 and a battery assembly 2. Specifically, a closed space is formed inside the housing assembly 1, and the battery assembly 2 is disposed in the closed space of the housing assembly 1 and is used to provide stable electric energy for the vehicle. Further, the battery assembly 2 includes a battery cell group 21, and the battery cell group 21 includes a first battery cell group 211 and a second battery cell group 212 connected in parallel. Further still, Figure 3 is a schematic diagram of the battery assembly provided by an embodiment of the present utility model, combined with Figure 2 and Figure 3As shown, the first battery cell group 211 includes a plurality of first battery cells 2111 stacked longitudinally and distributed in an S-shaped series. The second battery cell group 212 includes a plurality of second battery cells 2121 stacked longitudinally and distributed in an S-shaped series. Optionally, the plurality of first battery cells 2111 are arranged to form a vertical plane, and the plane formed by the plurality of second battery cells 2121 is parallel to this vertical plane. Thus, through the series-parallel connection method of the battery cell group 21, the wiring path can be shortened during wiring, and later maintenance can be made more convenient. At the same time, it also helps to reduce costs.

[0032] Exemplarily, in combination with Figure 2 and Figure 3 As shown, there are twelve first battery cells 2111, which are arranged in four rows and three columns to form the first battery cell group 211. Correspondingly, there are twelve second battery cells 2121, which are arranged in four rows and three columns to form the second battery cell group 212. It should be noted that for the first battery cell group 211, the four first battery cells 2111 in each column are connected in series in turn. The electrode arrangement of the first battery cells 2111 in the second column is opposite to that in the first column and the third column. At the same time, the uppermost first battery cell 2111 in the second column is connected in series with the uppermost first battery cell 2111 in the first column, and the lowermost first battery cell 2111 in the second column is connected in series with the lowermost first battery cell 2111 in the third column, thereby forming an S-shaped series path. On the other hand, the second battery cell group 212 forms an S-shaped series path by using the same series connection method as the first battery cell group 211, and is connected in parallel with the first battery cell group 211.

[0033] In combination with Figure 2 and Figure 3As shown, in one embodiment, the battery assembly 2 further includes a protection board bracket 22 and a protection board 23. Specifically, the protection board bracket 22 is disposed at the lower end of the battery cell group 21 and forms a receiving groove with an opening at the bottom. Further, the protection board 23 is disposed within the protection board bracket 22, that is, within the receiving groove of the protection board bracket 22, so that the installation and protection of the protection board 23 can be achieved through the protection board bracket 22. Optionally, a gap of 0.3 to 0.5 millimeters is reserved between the protection board 23 and the protection board bracket 22 for installation. It should be noted that after the installation of the protection board 23 is completed, waterproof sealing treatment of the protection board 23 can be achieved by pouring glue onto the end face of the protection board bracket 22. Optionally, the protection board 23 is a BMS (Battery Management System) board, which is used to manage the battery cell group 21, so as to improve the utilization rate of the battery cell group 21 and prevent overcharging and over-discharging of the battery cell group 21. It should be noted that by optimizing the series-parallel connection method of the battery cell group 21, the positive and negative electrodes of the battery cells can lead out at positions adjacent to the protection board 23, which helps to shorten the wiring path during wiring, makes later maintenance more convenient, and also helps to reduce costs.

[0034] As Figure 3 shown, in one embodiment, the battery assembly 2 further includes a temperature sensor 26. It should be noted that the temperature sensor 26 is configured to detect the temperature of the battery cell group 21. It should be further noted that there are multiple temperature sensors 26 which are spaced apart and disposed at different positions of the battery cell group 21, and are electrically connected to the protection board 23 through a wire harness, so as to cooperate with the protection board 23 to manage the battery cell group 21. Optionally, the temperature sensor 26 includes a negative temperature coefficient thermistor (NTC Thermistor), the resistance value of which decreases as the temperature increases, and it has the advantages of high sensitivity, good stability, small volume, etc.

[0035] As Figure 3 shown, in one embodiment, the battery assembly 2 further includes a plurality of nickel sheet groups 24. It should be noted that corresponding to the longitudinal stacking of the battery cell group 21, the plurality of nickel sheet groups 24 are arranged longitudinally. Further, a plurality of first battery cells 2111 and a plurality of second battery cells 2121 are provided between each nickel sheet group 24. Exemplarily, corresponding to the first battery cells 2111 and the second battery cells 2121, there are twelve each and are respectively arranged in four rows and three columns, and there are four nickel sheet groups 24, and three first battery cells 2111 and three second battery cells 2121 are provided between each nickel sheet group 24. It is easily understood that the nickel sheet groups 24 are used to perform series-parallel connection on the first battery cells 2111 and the second battery cells 2121.

[0036] like Figure 3 As shown, in one embodiment, the nickel sheet group 24 includes a first nickel sheet layer 241 and a second nickel sheet layer 242. Further, the first nickel sheet layer 241 protrudes outward to form a plurality of first series welding portions 2411, and the second nickel sheet layer 242 protrudes outward to form a plurality of second series welding portions 2421, and the positions of the second series welding portions 2421 match the positions of the first series welding portions 2411. Furthermore, Figure 4 is a partial schematic diagram of a battery assembly provided by an embodiment of the utility model, such as Figure 4 As shown, the first series welding part 2411 is provided with a first through hole 2412, and the second series welding part 2421 is provided with a second through hole 2422, and the position of the second through hole 2422 is staggered with the position of the first through hole 2412. Thus, when a plurality of first battery cells 2111 or a plurality of second battery cells 2121 are connected in series, the first series welding part 2411 is bent and welded with the adjacent second series welding part 2421, and the first through hole 2412 is staggered with the second through hole 2422 to increase the welding area, thereby improving the welding strength. On the other hand, when the battery structure needs to be repaired, the solder paste welded in series up and down can be cut to separate the battery cells, which is simple to maintain and low in cost. It should be noted that the structure of the first nickel sheet layer 241 and the second nickel sheet layer 242 is adjusted according to the series-parallel mode of the battery group 21. Optionally, the first nickel sheet layer 241 and the second nickel sheet layer 242 can be insulated by providing an insulating sheet.

[0037] Combination Figure 3 and Figure 4 As shown, in one embodiment, the bracket group 25 is protruded toward the outside to form a plurality of abutment portions 251. It should be noted that the abutment portions 251 abut against the shell assembly 1. It is easy to understand that the plurality of abutment portions 251 are distributed at intervals along the circumference to ensure that the battery assembly 2 will not fail to work properly due to position offset when it is set in the shell assembly 1.

[0038] Combination Figure 3 and Figure 4As shown, in one embodiment, the bracket group 25 is protruded toward the outside to form a plurality of wiring portions 252. Furthermore, the wiring portion 252 is formed with a wiring groove 2521, so that the wiring harness of the battery assembly 2 can be routed along the wiring groove 2521, thereby preventing the battery assembly 2 from failing to work properly due to positional displacement of the wiring harness. As an optional embodiment, the size of the notch of the wiring groove 2521 is reduced, that is, the top of the wiring portion 252 is bent to reduce the notch size of the wiring groove 2521, thereby helping to prevent the wiring harness of the battery assembly 2 from escaping from the wiring groove 2521. It should be noted that the wiring portion 252 abuts against the shell assembly 1, thereby cooperating with the abutting portion 251 to fix the battery assembly 2 in the shell assembly 1. Optionally, the top of the wiring portion 252 is further raised to meet the size requirements for abutting against the shell assembly 1.

[0039] like Figure 3 As shown, in one embodiment, the bracket group 25 includes a first bracket 253 and a second bracket 254, and each layer of the first battery cell 2111 and the second battery cell 2121 is arranged between the first bracket 253 and the second bracket 254 of the corresponding bracket group 25. Optionally, the first bracket 253 and the second bracket 254 are provided with grooves matching the first battery cell 2111 and the second battery cell 2121, and a single-side gap of 0.05 mm is reserved between the groove wall of the groove and the first battery cell 2111 and the second battery cell 2121 to prevent being too tight or too loose, so that the two ends of the first battery cell 2111 and the second battery cell 2121 can be embedded in the groove, and the bottom of the groove is hollowed out to set the nickel sheet group 24. It is easy to understand that the first bracket 253 and the second bracket 254 are both provided with abutment portions 251 and wiring portions 252.

[0040] like Figure 2 As shown, in one embodiment, the battery assembly 2 further includes a long screw 27. Optionally, there are two long screws 27 and they are arranged at intervals. Furthermore, a copper nut is reserved on the protection plate bracket 22. When the battery cell group 21 is stacked through multiple bracket groups 25, the long screw 27 passes through the multiple bracket groups 25 from the top and is threadedly connected with the copper nut on the protection plate bracket 22, so that the battery assembly 2 can be assembled.

[0041] Combination Figure 1 and Figure 2As shown, in one embodiment, the housing assembly 1 includes an aluminum cylinder 11, an upper end cap 12, and a lower end cap 13, which are used to protect the battery assembly 2. Specifically, both ends of the aluminum cylinder 11 are open to form a cylindrical structure. The battery assembly 2 is disposed inside the aluminum cylinder 11, and at the same time, the abutting portion 251 and the wiring portion 252 abut against the inner sidewall of the aluminum cylinder 11 to limit the battery assembly 2. Further, the upper end cap 12 closes the upper end of the aluminum cylinder 11, and the lower end cap 13 closes the lower end of the aluminum cylinder 11. Optionally, the aluminum cylinder 11 is made of aluminum alloy, and the upper end cap 12 and the lower end cap 13 are made of PC plastic and ABS resin. The upper end cap 12 and the lower end cap 13 are respectively fixedly connected to the aluminum cylinder 11 by screws. On the other hand, the end face of the upper end cap 12 limits the bracket group 25, and the end face of the lower end cap 13 limits the protection plate bracket 22, thereby preventing the battery assembly 2 from moving longitudinally. Thus, the upper end cap 12 and the lower end cap 13 cooperate to close the aluminum cylinder 11, so that the housing assembly 1 can form a closed space. Optionally, a sealing ring made of silicone rubber is provided between the upper end cap 12 and the aluminum cylinder 11 and between the lower end cap 13 and the aluminum cylinder 11 to enhance the sealing performance of the housing assembly 1, thereby extending the service life of the battery structure. Further, a charging plug 121 is provided on the upper end cap 12, and a discharging plug 131 is provided on the lower end cap 13. Glue is applied at both the charging plug 121 and the discharging plug 131 to achieve waterproof sealing. It is easy to understand that by providing the charging plug 121 and the discharging plug 131, the charging and discharging functions of the battery structure can be realized, so that the battery structure can be used as a power source for a vehicle.

[0042] As Figure 2 shown, in one embodiment, an electronic tag 122 is further provided on the upper end cap 12, and the electronic tag 122 is electrically connected to the protection plate 23. Optionally, the electronic tag 122 is adhered to the inner side of the upper end cap 12 by adhesive to prevent loss. It should be noted that the electronic tag 122 uses radio frequency identification (RFID) technology. Through the electronic tag 122, the purpose of identifying and data exchanging of the battery structure can be achieved, which helps to track and manage the battery structure.

[0043] Figure 5 is a schematic diagram of the lower end cap provided by an embodiment of the present invention. As Figure 5As shown, in one embodiment, a water inlet detection board 132 is further provided on the lower end cover 13, and the water inlet detection board 132 is electrically connected to the protection board 23. It is easy to understand that the water inlet detection board 132 is configured to detect whether water enters the housing assembly 1, that is, to detect whether water enters the battery structure, so as to cooperate with the protection board 23 to protect the battery assembly 2. It should be noted that since the liquid will flow downward after leaking into the housing assembly 1, setting the water inlet detection board 132 on the lower end cover 13 can detect water leakage at the bottom of the battery structure, which helps to quickly detect whether leakage occurs.

[0044] Figure 6 is a schematic diagram of the upper end cover provided by an embodiment of the present invention. As Figure 6 shown, in one embodiment, a latch 123 is further provided on the upper end cover 12. It should be noted that when the battery structure is installed on a vehicle, the latch 123 can lock the battery structure, thereby fixing the battery structure. Optionally, the battery structure can drive the latch 123 to unlock in the form of an electronic lock, so that the battery structure is installed on the vehicle in a detachable manner.

[0045] An embodiment of the present invention also provides a power-assisted vehicle, which includes a vehicle frame and a battery structure. The battery structure is detachably embedded in the vehicle frame and is configured to supply power to the power-assisted vehicle. Among them, the battery structure is as described above and will not be elaborated here. It should be noted that by providing this battery structure, the power-assisted vehicle can be conveniently maintained later and the cost can be reduced.

[0046] An embodiment of the present invention provides a battery structure and a power-assisted vehicle. The battery structure includes a housing assembly and a battery assembly disposed in the closed space of the housing assembly. The battery assembly includes a battery cell group, and the battery cell group includes a first battery cell group and a second battery cell group connected in parallel. The first battery cell group includes a plurality of first battery cells stacked longitudinally and distributed in an S-shaped series. The second battery cell group includes a plurality of second battery cells stacked longitudinally and distributed in an S-shaped series. Thus, by optimizing the series-parallel connection method, the battery structure realizes shortening the wiring path and making maintenance more convenient, and at the same time helps to reduce costs.

[0047] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery structure, characterized in that, The battery structure includes: A housing assembly (1) that forms a closed space; and A battery assembly (2) disposed within the closed space of the housing assembly (1) and including an electric cell group (21). The electric cell group (21) includes a first electric cell group (211) and a second electric cell group (212) connected in parallel. The first electric cell group (211) includes a plurality of first electric cells (2111) stacked longitudinally and distributed in an S-shaped series. The second electric cell group (212) includes a plurality of second electric cells (2121) stacked longitudinally and distributed in an S-shaped series.

2. The battery structure according to claim 1, characterized in that, The battery assembly (2) further includes: A protection board bracket (22) disposed at the lower end of the electric cell group (21); and A protection board (23) disposed within the protection board bracket (22) and electrically connected to the electric cell group (21).

3. The battery structure according to claim 1, characterized in that, The battery assembly (2) further includes: A plurality of nickel sheet groups (24) arranged longitudinally. A plurality of the first electric cells (2111) and a plurality of the second electric cells (2121) are provided between each of the nickel sheet groups (24).

4. The battery structure according to claim 3, wherein, The nickel sheet group (24) includes: A first nickel sheet layer (241) that protrudes outward to form a plurality of first series welding portions (2411). A first through hole (2412) is provided on the first series welding portion (2411); and A second nickel sheet layer (242) that protrudes outward to form a plurality of second series welding portions (2421). The positions of the second series welding portions (2421) match the positions of the first series welding portions (2411). A second through hole (2422) is provided on the second series welding portion (2421). The position of the second through hole (2422) is offset from the position of the first through hole (2412).

5. The battery structure according to claim 1, wherein, The battery assembly (2) further includes: A plurality of bracket groups (25) connected in sequence longitudinally. A plurality of the first electric cells (2111) and a plurality of the second electric cells (2121) are provided between each of the bracket groups (25).

6. The battery structure according to claim 5, characterized in that, The bracket group (25) protrudes outward to form a plurality of abutting portions (251) and a plurality of wiring portions (252). The abutting portions (251) and the wiring portions (252) abut against the housing assembly (1). The wiring portion (252) forms a wiring groove (2521).

7. The battery structure according to claim 1, wherein, The housing assembly (1) includes: An aluminum cylinder (11) with both ends open and the battery assembly (2) disposed inside; An upper end cap (12) that closes the upper end of the aluminum cylinder (11). A charging plug (121) is provided on the upper end cap (12); and A lower end cap (13) that closes the lower end of the aluminum cylinder (11). A discharge plug (131) is provided on the lower end cap (13).

8. The battery structure according to claim 7, characterized in that, An electronic tag (122) is also provided on the upper end cap (12).

9. The battery structure according to claim 7, characterized in that, An inlet water detection board (132) is further provided on the lower end cover (13).

10. The battery structure according to claim 1, characterized in that, The battery assembly (2) further includes: a temperature sensor (26), which is configured to detect the temperature of the battery cell group (21).

11. A power-assisted vehicle, characterized in that, The power-assisted vehicle includes: a battery structure according to any one of claims 1-10.

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