CN215098026U - Light electric vehicle battery - Google Patents

Abstract

The utility model relates to a light electric vehicle battery, its structure includes power shell, control shell, power supply module and control assembly, power shell and control shell separable set, power supply module sets up on the power shell, control assembly sets up on the control shell, power supply module includes group battery, battery protection shield and the battery circuit board that sets up in the power shell; the power supply extension part is characterized by further comprising a guide plate, the direction of the guide plate is consistent with the extending direction of the power supply extension part, and the guide plate is matched with the power supply shell and the control shell. The technical scheme of the utility model structural design is reasonable, has less volume and lighter quality, the installation of specially adapted bicycle.

Description

Light electric vehicle battery

Technical Field

The utility model relates to a battery structure, especially a light-duty electric motor car battery.

Background

The conventional electric vehicle battery has unreasonable layout and low integration level, so that the production and installation are complex, much time is consumed for line connection, and the production cost is high; particularly, when the battery is applied to the field of bicycles, the existing battery is large in size and heavy in weight, so that the battery is not suitable for the requirement of light weight of the bicycle and has great assembly limitation. Chinese patent publication CN205028952U discloses a down tube type lithium battery box for electric bicycle, which comprises a front cover, a rear cover, a control box and a guide rail, and the whole structure is more suitable for the installation requirement of the electric bicycle, but does not set the installation position of the key components (such as battery protection plate), and the components are installed at random, which affects the battery assembly and does not improve the whole integration level (such as controller integration).

Disclosure of Invention

The utility model aims to solve the technical problem that an electric motor car battery that structural design is reasonable is provided, the installation of specially adapted bicycle.

The utility model provides a technical scheme that above-mentioned technical problem adopted is:

a light electric vehicle battery structurally comprises a power supply shell, a control shell, a power supply assembly and a control assembly, wherein the power supply shell and the control shell are arranged in a separable mode, the power supply assembly is arranged on the power supply shell, the control assembly is arranged on the control shell, the power supply assembly comprises a battery pack, a battery protection plate and a battery circuit board, the battery pack is arranged in the middle of the power supply shell, the battery protection plate and the battery circuit board are respectively arranged on two sides of the battery pack, the battery protection plate and the battery circuit board are connected in series, the battery protection plate is further provided with a battery sampling line connected with the battery pack, and a first power supply connecting piece is connected onto the battery circuit board; the control assembly comprises a controller and a control circuit board which are arranged in the control shell, the controller is connected with the control circuit board, and a second power supply connecting piece is connected onto the control circuit board; at least one of the first and second power supply connectors has a power supply extension extending out of the power supply housing or the control housing; the power supply extension part is characterized by further comprising a guide plate, the direction of the guide plate is consistent with the extending direction of the power supply extension part, and the guide plate is matched with the power supply shell and the control shell.

Furthermore, the guide plate extends outwards from the control shell, fixed teeth are respectively arranged on two sides of the guide plate, at least part of the fixed teeth are L-shaped teeth, a guide groove matched with the guide plate is formed in the power supply shell, and a fixing block matched with the L-shaped teeth is arranged in the guide groove.

Furthermore, a locking assembly is further arranged in the power supply shell and comprises a power supply lock bolt, a power supply unlocking rod and a spring, the power supply lock bolt is matched with the fixed teeth, the spring enables the power supply lock bolt to be kept in the guide groove, and the power supply unlocking rod drives the power supply lock bolt to leave the guide groove when moving.

Preferably, the power supply device further comprises a positioning block and a positioning hole which are matched with each other, and the positioning block and the positioning hole are respectively arranged on the surface of the power supply shell where the first power supply connecting piece is located and the surface of the control shell where the second power supply connecting piece is located.

Preferably, the first power supply connecting part is a banana jack, the second power supply connecting part is a banana plug, and the second power supply connecting part is connected with the control circuit board through a flexible wire.

Preferably, the battery circuit board is further connected with a power supply input port, a power supply switch and a USB socket, and the surface of the power supply shell is provided with an opening matched with the power supply input port, the power supply switch and the USB socket.

Preferably, still be connected with the electric quantity indicating subassembly on the battery circuit board, the electric quantity indicating subassembly includes electric quantity indicator board, electric quantity pilot lamp, electric quantity indication switch and leaded light post, the electric quantity pilot lamp sets up on the electric quantity indicator board and through electric quantity indication switch control switching, the light opening has been seted up on power shell surface, the leaded light post sets up between electric quantity pilot lamp and light opening.

Preferably, the guide plate is provided with at least three mounting holes, the mounting holes are arranged at equal intervals, and the electric vehicle battery is fixed on the electric vehicle frame through the mounting holes.

Further, the power shell passes through the division board and vertically divides into the first accommodation space that is located the power shell middle part and second accommodation space and the third accommodation space that is located first accommodation space both sides, the group battery passes through the spacing setting of division board in first accommodation space, battery protection board and battery circuit board vertically set up respectively in second accommodation space and third accommodation space.

Preferably, a protection board clamping groove is further arranged in the second accommodating space.

Compared with the prior art, the utility model have following advantage and effect:

1. the power shell is designed into a three-section type isolation structure, the battery pack, the battery protection board and the battery circuit board are reasonably arranged, the battery volume is reduced, the internal circuit structure of the battery is simplified, the battery circuit board has an element supporting function and an electric wire replacing capacity, and meanwhile, the function expansion is facilitated;

2. the locking structure of the power supply shell and the control shell realizes the longitudinal and horizontal locking of the battery and the base through the structures of the L-shaped teeth, the fixing blocks, the positioning blocks and the positioning holes, and realizes the transverse locking of the battery through the structures of the power supply lock plunger and the power supply unlocking rod;

3. the power supply connecting piece adopts the matching of the banana plug and the socket, and the tiny vibration and displacement of the battery can be counteracted by the banana plug which is movably connected;

4. the functions are complete and easy to expand, and the battery circuit board and the control circuit board can be flexibly expanded;

5. the guide plate is provided with mounting holes, the hole spacing is reasonable, the mounting position can be flexibly adjusted while the mounting strength is ensured, the installation on various types of bicycles is convenient, and larger manufacturing tolerance can be accommodated;

6. the production cost is low, the integration degree is high, the equipment layout is reasonable, the assembly process is simple, and compared with the similar products in the market, the assembly time can be saved by more than 50%.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic perspective view of a power module.

Fig. 4 is a bottom view of the power module.

Fig. 5 is a schematic perspective view of the power module.

Fig. 6 is a schematic perspective view of the back side of the battery circuit board.

Fig. 7 is a schematic perspective view of the power supply case when it is not assembled.

Fig. 8 is a perspective view of the power module assembled in the power housing.

Fig. 9 is a perspective view of the locking assembly.

Fig. 10 is a schematic perspective view of the power supply case when the assembly is completed.

Fig. 11 is a schematic perspective view of the control assembly.

Fig. 12 is a schematic perspective view of the control housing when assembled.

Description of reference numerals:

Detailed Description

The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.

Example 1:

the power supply and control device is used for power supply and control of the electric bicycle/mountain bike, has smaller volume and lighter mass, is suitable for installation and application of the electric bicycle/mountain bike, and can be installed and used on a common electric bicycle besides the electric bicycle/mountain bike. As shown in fig. 1 and 2, the housing of the embodiment is divided into a power supply housing 1 and a control housing 2, the bottom of the control housing 2 is fixedly connected with a guide plate 3, the power supply housing 1 performs horizontal translation and guide through the guide plate 3, and the power supply housing 1 is limited after being butted with the control housing 2; in other embodiments, the power supply housing 1 and the control housing 2 may be butted in an oblique or vertical direction, and the orientation of the guide plate 3 may be adjusted according to the actual butting direction; in other embodiments, the guide plate 3 may also be disposed on the top or side of the control housing 2 or other parts, for example, when the application scene is that the power supply needs to be fixed on the bottom or side of the vehicle frame; in other embodiments, the guide plate 3 is detachably connected with the power supply shell 1 and the control shell 2, for example, the guide plate is arranged as a U-shaped sliding groove, and the power supply shell and the control shell can slide and limit in the sliding groove; in some embodiments, the guide plate 3 has been pre-mounted or fixed to the frame of the electric/mountain bike; in the present embodiment, 14 mounting holes 32 are provided on the guide plate 3 at equal intervals, and any two or more mounting holes may be selected to provide mounting bolts 6 for fixing the guide plate 3 and the control housing 2 according to different vehicle frame conditions.

Referring to fig. 3 to 6, the power module 4 includes a battery pack 41, a battery protection plate 42 and a battery circuit board 43, wherein the battery protection plate 42 and the battery circuit board 43 are respectively disposed on two sides of the battery pack 41, and the three are connected in series through a first power supply lead 411, a second power supply lead 412 and a third power supply lead 413. The battery pack 41 is composed of 4-to-10-string 18650 batteries, two sides of the battery pack 41 are connected in series and parallel through thin steel nickel strips, and the battery strings at two ends are provided with thin copper sheets as positive and negative electrode output electrodes of the battery pack 41. The battery sampling lines 421 are connected between the battery protection board 42 and each series node of the battery pack 41, the battery sampling lines 421 monitor the working condition of the battery pack 41 by detecting the voltage condition of each node, and when the voltage or temperature change of the battery pack 41 exceeds a threshold value, the battery protection board 42 can adopt overcharge protection, overdischarge protection or overcurrent and short circuit protection. The battery circuit board 43 realizes the function of a battery mainboard, and a first power supply connector 44, a first pre-charging connector 45, an electric quantity indicating component 46, a USB socket 47 and a power supply input port 48 are arranged on the battery circuit board 43; the first power supply connector 44 is connected to the battery pack 41 through a power supply lead and a power supply switch 414, and the power supply switch 414 is used for controlling the on-off between the two and is arranged in an opening formed in the side surface of the power supply housing 1 (see fig. 1); the first pre-charging connector 45 is connected with the battery pack 41 through a pre-charging wire 451 and a pre-charging switch 452, the pre-charging switch 452 is used for controlling the on-off of the two and is arranged in an opening formed on the surface of the power supply shell 1, which is in butt joint with the control shell 2 (see fig. 10); the power indicating assembly 46 is disposed on the side of the battery circuit board 43, and is composed of a power indicating board 461, a power indicating lamp 462, a light guide 463 and a power indicating switch 464, the power indicating lamp 462 is 5 LED lamps and is disposed on the power indicating board 461, the power indicating board 461 controls the on/off of the power indicating lamp 462 according to the power condition of the battery pack 41 transmitted by the battery circuit board 43, if the remaining power is 75% of the total capacity, 4 LED lamps in the power indicating lamp 462 are lit, in combination with fig. 1, the light guide 463 is fixed in a light-passing port formed on the side of the power supply housing 1, most of light emitted by the power indicating lamp 462 can be emitted out of the power supply housing 1 by the refraction and reflection of the light guide 463, the power indicating switch 464 is disposed protruding from the side of the power supply housing 1, the power indicating board 461 can be controlled to start or stop working by the power indicating switch 464, in another embodiment, a time delay device is further disposed on the power indicating board 461, when the power indication switch 464 is triggered, the power indication board 461 starts to work, and after the time set on the time delay device, for example, 5 seconds, the power indication board 461 stops automatically; the USB socket 47 and the power input port 48 are also communicated with the outside through openings opened on the upper surface and the side surface of the power supply case 1, wherein the USB socket 47 is used for supplying power to external devices, the power input port 48 is a DC socket for charging the battery pack 41, and in another embodiment, the power input port 48 is directly communicated with the first power supply connector 44 and the first pre-charging connector 45, and even if the battery pack 41 is not used, the function of driving the electric vehicle can be realized only by supplying power from the external power source.

Referring to fig. 7 and 8, the internal structure of the power supply housing 1 is divided into a second receiving space 12, a first receiving space 11 and a third receiving space 13 from left to right by a left partition plate 14 and a right partition plate 15, wherein the first receiving space 11 is used for receiving the battery pack 41, and after the battery pack 41 is received in the first receiving space 11, the horizontal sliding of the battery pack 41 is limited by the left partition plate 14 and the right partition plate 15, because the first receiving space 11 is located in the middle of the power supply housing 1, the amplitude of vibration of the battery pack 41 is small and the center of gravity is stable when the vibration occurs outside, a protection board slot 16 is provided in the second receiving space 12, the battery protection board 42 is positioned by the protection board slot 16, and the battery circuit board 43 is received in the third receiving space 13 and positioned on the inner surface of the power supply housing 1.

Referring to fig. 10, the bottom plate of the power supply housing 1 is provided with a U-shaped groove, the U-shaped groove is a guide groove 18 matched with the guide plate 3, two sides of the bottom of the guide groove 18 are provided with protruding fixing blocks 181, the bottom plate is further provided with two through holes for the first pre-charging connector 45 to pass through and enter the guide groove 18, the surface of the power supply housing 1, which is in butt joint with the control housing 2, is further provided with two through holes for the first power supply connector 44 to communicate with the outside, and the same surface is further provided with an inward-concave positioning hole 17.

As shown in fig. 11, the control assembly 5 includes a controller 51, a control circuit board 52, a second power supply connector 53, a second pre-charge connector 54 and a control line 55, wherein the controller 51 is used for driving the motor of the electric vehicle to operate, and the control circuit board 52 is connected with the second power supply connector 53, the second pre-charge connector 54 and a pre-charge resistor (not shown in the figure), wherein the second power supply connector 53 is connected with the control circuit board 52 through a flexible wire, wherein the flexible wire can be selected from a copper-core polyvinyl chloride insulated wire, a polyethylene insulated flexible wire and the like, so that the second power supply connector 53 can be fixed at rest and can generate a small displacement relative to the control circuit board 52 during vibration. The control circuit board 52 is further connected to a controller switch 511 for controlling the controller 51 to be turned on and off, and a control line 55 extends outwards from the controller 51 to be connected to each device to be powered of the electric vehicle, where the control line 55 in this embodiment is an instrument line, a rotation speed line and a motor line.

Referring to fig. 5, 10 and 12 for explaining the implementation of the power supply and pre-charging functions, in this embodiment, the first power supply connector 44 is a banana jack, and is integrally disposed in the power supply housing 1 and is communicated with the outside through an opening on the surface of the power supply housing 1, the first pre-charging connector 45 is a Pogo pin (Pogo pin), the Pogo pin is disposed vertically with respect to the banana jack, a needle head of the Pogo pin is movable in a vertical direction, and in a natural state, a part of the needle head of the Pogo pin extends into the guide groove 18 from a through hole of the bottom plate of the power supply housing 1; the second power supply connector 53 is a banana plug, the banana plug extends out of the control shell 2, the banana plug is provided with elastic pieces extending outwards in the radial direction in the shape, in the embodiment, the connector is composed of a base and four elastic pieces, the elastic pieces are connected to the base and arranged in a cross-groove-shaped interval manner, the outer diameter formed at the outermost side of each elastic piece is slightly larger than the inner diameter of the banana jack, the elastic pieces can be elastically deformed when the banana plug enters the banana jack so as to keep the tight connection between the elastic pieces and the banana jack, the second pre-charging connector 54 is a conductive metal plate, the extending directions of the guide plate 3, the banana plug and the conductive metal plate are parallel, the portion of the conductive metal plate extending out of the control shell 2 and extending outwards is supported by the upper surface of the guide plate 3, the length of the conductive metal plate extending outwards is longer than that of the banana plug, when the power supply shell 1 is butted with the control shell 2, the extending directions of the banana plug and the conductive metal plate are opposite to the moving direction of the power supply shell 1, the extending length of the conductive metal plate is long, the spring pin is firstly contacted with the conductive metal plate and is compressed to be always kept electrified, at the moment, a pre-charging circuit formed by the battery pack 41, the first pre-charging connecting piece 45, the second pre-charging connecting piece 54, the pre-charging resistor and the controller 51 is communicated, due to the existence of the pre-charging resistor, the current in the loop cannot be too large instantaneously, then, the banana jack is communicated with the banana plug to supply power after being contacted, at the moment, the controller 51 has initial voltage, and the loop cannot generate too large instantaneous current. In another embodiment, the first power supply connector 44 and the second power supply connector 53, and the first pre-charge connector 45 and the second pre-charge connector 54 are all engaged by a plug structure, wherein the second pre-charge connector 54 is communicated before the second power supply connector 53; in other embodiments, both of the first power supply connector 44 and the second power supply connector 53 and/or both of the first pre-charge connector 45 and the second pre-charge connector 54 extend out of the power supply housing 1 and/or the control housing 2, wherein the effective total length of the pre-charge extension (i.e. the portion that can be conducted after contact) is greater than the effective total length of the power supply extension; in other embodiments, the power supply extension portion, the pre-charging extension portion and the guide plate 3 are not disposed in parallel, for example, the second pre-charging connector 54 is a metal elastic sheet with an inclined angle, or the second pre-charging connector 54 is disposed on the same horizontal plane of the side surface of the second power supply connector 53, as long as the extension directions of the three are the same, that is, the power supply housing 1 and/or the control housing 2 are in the moving direction of the guide plate 3, the first power supply connector 44 and the second power supply connector 53, and the first pre-charging connector 45 and the second pre-charging connector 54 can be conducted.

Referring to fig. 2, 8, 9, 10 and 12 for explaining the realization of the abutting and limiting functions of the power supply housing 1 and the control housing 2, a locking assembly 19 is disposed on the power supply housing 1, the locking assembly 19 is composed of a power supply unlocking rod 191, a power supply locking bolt 192 and a spring 193, the spring 193 is disposed between the power supply unlocking rod 191 and the power supply locking bolt 192, the spring 193 is normally in a compressed state and keeps the power supply locking bolt 192 in the guide groove 18, fixing teeth 31 are disposed at both sides of the guide plate 3 at intervals, at least part of the fixing teeth 31 are L-shaped teeth, in this embodiment, the fixing teeth 31 are L-shaped teeth, the notches of the L-shaped teeth are matched with the fixing block 181, when the fixing block 181 is installed, the guide plate 3 is inserted into the guide groove 18 of the power supply housing 1 through the interval on the guide plate 3, at the moment, the power supply locking bolt 192 contacts with the fixing teeth 31 to make the power supply locking bolt 192 leave the guide groove 18, and then the power supply housing 1 can be translated towards the control housing 2 on the guide plate 3, the fixing block 181 enters the notch of the L-shaped tooth and pushes the power supply shell 1 to be attached to the control shell 2, two sides of the L-shaped tooth are attached to the fixing block 181, the horizontal side of the L-shaped tooth is attached to the bottom plate of the power supply shell 1 to achieve longitudinal direction limiting, meanwhile, the power supply lock plunger 192 reaches the interval and pops out under the action of the spring 193, so that one of the L-shaped tooth is propped against to prevent the power supply shell 1 from reversely withdrawing to achieve horizontal direction limiting, the positioning block 21 arranged on the control shell 2 also enters the positioning hole 17 at the moment, and transverse direction limiting is achieved by matching the fixing teeth 31 and the fixing block 181 on two sides. When the power supply case 1 needs to be separated, the power supply unlocking lever 191 is toggled, the power supply latch 192 is separated from the guide groove 18 by the inclined surface of the power supply unlocking lever 191, and the locking of the power supply case 1 on the guide plate 3 is released.

The assembly steps of this embodiment are:

A. assembling a battery pack: assembling a battery, a bracket, a sampling line and the like together;

B. assembling the battery circuit board and the battery protection board: welding all elements of the battery circuit board, and welding and connecting the battery circuit board and the battery protection board together by using a lead;

C. placing a battery pack: placing the battery pack into a power supply housing;

D. installing a battery circuit board, a battery protection board and a switch: installing the connected battery circuit board, battery protection board and switch into the power supply shell, fixing with screws, and welding wires;

E. installing a battery case bottom plate: installing the locking assembly into a power supply shell bottom plate, installing the power supply shell bottom plate on a power supply shell, and locking by using screws to complete the assembly of the power supply shell and the power supply assembly;

F. assembling a controller: connecting the banana plug, the conductive metal plate, the control circuit board, the controller switch, the control line and the like with the controller;

G. placing a control component: the connected control assembly is arranged in the control shell;

H. installing a control shell bottom plate: locking the control shell and the control shell bottom cover by using screws to complete control shell packaging;

I. fixing a control shell: fixing the control shell and the guide plate on the electric vehicle by using screws to finish the fixation of the control shell;

J. the battery shell is butted with the control shell: the battery case is mounted on the guide plate to be butted against the control case and locked by the locking assembly, completing the mounting.

In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the invention which are described in the patent conception of the invention are included in the protection scope of the patent of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides a light-duty electric motor car battery, includes power shell, control shell, power supply module and control assembly, power shell and control shell separable set, power supply module sets up on the power shell, control assembly sets up on the control shell its characterized in that: the power supply assembly comprises a battery pack, a battery protection plate and a battery circuit board which are arranged in a power supply shell, wherein the battery pack is arranged in the middle of the power supply shell, the battery protection plate and the battery circuit board are respectively arranged on two sides of the battery pack, the battery protection plate and the battery circuit board are connected in series, the battery protection plate is also provided with a battery sampling line connected with the battery pack, and the battery circuit board is connected with a first power supply connecting piece; the control assembly comprises a controller and a control circuit board which are arranged in the control shell, the controller is connected with the control circuit board, and a second power supply connecting piece is connected onto the control circuit board; at least one of the first and second power supply connectors has a power supply extension extending out of the power supply housing or the control housing; the power supply extension part is characterized by further comprising a guide plate, the direction of the guide plate is consistent with the extending direction of the power supply extension part, and the guide plate is matched with the power supply shell and the control shell.

2. A light electric vehicle battery as recited in claim 1, wherein: the guide plate extends outwards from the control shell, fixed teeth are respectively arranged on two sides of the guide plate, at least part of the fixed teeth are L-shaped teeth, a guide groove matched with the guide plate is formed in the power supply shell, and a fixing block matched with the L-shaped teeth is arranged in the guide groove.

3. A light electric vehicle battery as recited in claim 2, wherein: the power supply shell is characterized in that a locking assembly is further arranged in the power supply shell and comprises a power supply lock bolt, a power supply unlocking rod and a spring, the power supply lock bolt is matched with the fixed teeth, the spring enables the power supply lock bolt to be kept in the guide groove, and the power supply unlocking rod drives the power supply lock bolt to leave the guide groove when moving.

4. A light electric vehicle battery as recited in claim 3, wherein: the power supply device further comprises a positioning block and a positioning hole which are matched with each other, wherein the positioning block and the positioning hole are respectively arranged on the surface of the power supply shell where the first power supply connecting piece is located and the surface of the control shell where the second power supply connecting piece is located.

5. A light electric vehicle battery as recited in claim 1, wherein: the first power supply connecting piece is a banana jack, the second power supply connecting piece is a banana plug, and the second power supply connecting piece is connected with the control circuit board through a flexible wire.

6. A light electric vehicle battery as recited in claim 1, wherein: the battery circuit board is also connected with a power supply input port, a power supply switch and a USB socket, and the surface of the power supply shell is provided with an opening matched with the power supply input port, the power supply switch and the USB socket.

7. A light electric vehicle battery as recited in claim 1, wherein: still be connected with the electric quantity indicating subassembly on the battery circuit board, the electric quantity indicating subassembly includes electric quantity indicator board, electric quantity indicator lamp, electric quantity indicating switch and leaded light post, the electric quantity indicator lamp sets up on the electric quantity indicator board and through electric quantity indicating switch control switching, the light opening has been seted up on the power shell surface, the leaded light post sets up between electric quantity indicator lamp and light opening.

8. A light electric vehicle battery as recited in claim 1, wherein: the guide plate is provided with at least three mounting holes, the mounting holes are arranged at equal intervals, and the electric vehicle battery is fixed on the electric vehicle frame through the mounting holes.

9. A light electric vehicle battery as recited in any one of claims 1 to 8, wherein: the power shell is vertically divided into a first accommodating space located in the middle of the power shell and a second accommodating space and a third accommodating space located on two sides of the first accommodating space through the partition plate, the battery pack is arranged in the first accommodating space through the partition plate in a limiting mode, and the battery protection plate and the battery circuit board are longitudinally arranged in the second accommodating space and the third accommodating space respectively.

10. A light-duty electric vehicle battery as recited in claim 9, wherein: and a protective plate clamping groove is also arranged in the second accommodating space.

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