CN210576171U

CN210576171U - Lithium battery device for golf cart

Info

Publication number: CN210576171U
Application number: CN201921238086.6U
Authority: CN
Inventors: 刘迎波; 邓阮明; 蒋青波; 庄骏; 刘江; 刘伟
Original assignee: Meike New Energy Suzhou Co ltd
Current assignee: Meike New Energy Suzhou Co ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-05-19
Anticipated expiration: 2029-08-01

Abstract

The utility model provides a lithium cell device for golf cart, including the shell, set up inside a plurality of series connection's of shell lithium cell group, protection component, a plurality of screw rod and nut, it is inseparable to arrange between a plurality of series connection's the lithium cell group, makes lithium cell device small. Arrange the lithium cell group that is listed as and fix through the screw rod, in addition, a plurality of parallel connection's in the lithium cell group lithium cell monomer is fixed and is connected through the connector component, makes the utility model discloses a lithium cell device has certain shock resistance, small advantage when satisfying the required high-power volume of golf cart.

Description

Lithium battery device for golf cart

Technical Field

The utility model relates to a lithium cell technical field especially relates to a lithium cell device for golf cart.

Background

Lithium batteries are widely used because of their advantages of high voltage, large capacity, small size, light weight, wide working temperature range, etc. Lithium batteries can be broadly classified into two types: lithium metal batteries and lithium batteries. Lithium metal batteries are generally non-rechargeable and contain lithium in a metallic state. Lithium batteries do not contain lithium as metallic titanium and are rechargeable.

Along with the development of the society, the market demand is more and more big, and duration and capacity requirement to lithium battery equipment are higher and more, and the capacity of lithium battery monomer can not satisfy the demand of each trade, and every company can increase the capacity behind the lithium battery monomer many more to satisfy the demand. The lithium battery module is generally formed by connecting a plurality of lithium battery cells in series and parallel, so that a larger battery capacity is obtained.

Generally, batteries for golf carts are lead-acid batteries, and have the disadvantages of large volume, heavy weight, short service life and short driving mileage. With the development of society, industrial batteries are also being lightened, and batteries for golf cars are also replaced by lead-acid batteries. In addition, the driving environment of the golf cart is not always flat, and the golf cart is frequently walked on a lawn, so that the golf cart is difficult to avoid bumping, the battery used by the golf cart is always in a bumpy state, and the service life of the battery of the golf cart is shortened after a long time. Therefore, how to solve the technical problems of large volume, heavy weight and short service life of the battery for the golf cart in the field is always the problem.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a lithium battery device for golf cart, be in including shell, setting inside a plurality of series connection's of shell lithium cell group, protection component, lithium battery device are small, impact resistance is strong.

In order to realize the technical scheme, the utility model discloses a following technical scheme realizes.

The utility model provides a pair of a lithium cell device for golf cart, include:

the shell is in a long flat block shape and comprises an upper cover, a front cover and a bottom cover, wherein the upper cover, the front cover and the bottom cover are detachably connected, the upper cover is provided with a charge-discharge negative terminal, a charge positive terminal and a discharge positive terminal, and the charge-discharge negative terminal and the discharge positive terminal protrude out of the outer surface of the upper cover and are used for being connected with a golf cart;

the lithium battery packs are connected in series to form a battery module and are arranged in the shell to output the electric quantity required by the golf cart;

a protective member disposed between the housing and the battery module to protect the battery module;

the screw rods penetrate through the lithium battery packs arranged in the same row and then are locked with the nuts so as to fix the battery module.

Preferably, the lithium cell group includes the electric quantity output end, a plurality of series connection's lithium cell group divide into two sets ofly, and a plurality of lithium cell group of every group is a plurality of rows and a plurality of rows of arranging, and the electric quantity output end orientation of a plurality of lithium cell group of every group is unanimous, and the electric quantity output end orientation of a plurality of lithium cell group of different groups is the opposite range.

Preferably, the lithium battery pack includes:

the lithium battery comprises a plurality of lithium battery monomers which are connected in parallel, wherein each lithium battery monomer comprises a positive electrode lug and a negative electrode lug;

the connector components comprise a first groove, a second groove and an isolation part arranged between the first groove and the second groove, the first groove and the second groove are used for placing the lithium battery single bodies, and two adjacent lithium battery single bodies are isolated through the isolation part;

the battery cell terminal comprises a positive battery cell terminal and a negative battery cell terminal, the positive battery cell terminal is connected with the positive electrode lug in a laminating manner, and the negative battery cell terminal is connected with the negative electrode lug in a laminating manner;

the copper bar comprises a positive copper bar and a negative copper bar, the positive copper bar is connected with the positive electrode cell terminal, and the negative copper bar is connected with the negative electrode cell terminal, so that the parallel connection among a plurality of lithium battery monomers is realized;

the shell is installed on the outer sides of the lithium battery units connected in series.

Preferably, the copper bar further comprises a plurality of series-connection copper bars, a positive electrode input and output copper bar and a negative electrode input and output copper bar, and the plurality of series-connection copper bars are used for connecting a plurality of lithium battery monomers in series.

Preferably, still include block connection structure, the casing includes top panel, bottom panel, block connection structure is including setting up a plurality of first joint recesses and first joint on two relative lateral surfaces of connector component are protruding, set up a plurality of second joint on top panel and the bottom panel are protruding and the second joint recess, the protruding second joint recess of second joint with the protruding position of first joint recess/first joint of connector component is corresponding and looks shape phase-match, and is a plurality of between the connector component, the connector component with connect through block connection structure between the casing.

Preferably, the protection member includes an insulation plate disposed between the power output terminal and an inner sidewall of the case, and a fixing plate disposed on an outer side surface of the battery module parallel to the lithium battery cells.

Preferably, the top end of the connector component is provided with a connecting piece, the bottom end of the connector component is provided with a fixing piece, and the screw rod penetrates through the fixing plate and the battery modules which are arranged in the same row of the lithium battery packs and are opposite to the connecting piece/fixing piece and then is locked with the nut.

Preferably, still include the relay, in advance discharge resistance, in advance discharge relay, the relay includes charging relay and discharge relay, positive pole input/output copper bar in proper order with charging relay and discharge relay are connected, in advance discharge resistance with in advance discharge relay respectively with discharge relay electric connection, charging relay with the positive terminal electric connection that charges, discharge relay with the positive terminal electric connection that discharges.

Preferably, the power supply further comprises a shunt and a fuse, the negative input and output copper bar is connected with the fuse, the fuse is connected with the shunt, and the shunt is electrically connected with the charge and discharge negative terminal.

Preferably, still include the battery protection base plate, battery protection base plate top detachably installs on the upper cover of shell, the battery protection base plate respectively with a plurality of lithium cell group electric connection through a plurality of voltage acquisition line, the battery protection base plate respectively with charge relay and discharge relay electric connection.

Preferably, two opposite outer side surfaces of the connecting piece are respectively attached with a positive electrode lug or a negative electrode lug of two adjacent lithium battery monomers, wherein the positive electrode lug or the negative electrode lug is connected by the battery cell terminal, and the height of the connecting piece is greater than or equal to the length of the positive electrode lug or the negative electrode lug.

Preferably, the positive copper bar is connected with the positive battery cell terminal, and the negative copper bar is connected with the negative battery cell terminal through a bolt and a nut.

Preferably, the two side surfaces of the lithium battery unit are respectively provided with a lithium battery protruding part, and the size and the shape of the lithium battery protruding part are consistent with those of the first groove and the second groove of the connector component.

Preferably, the side panels comprise three panels, the top panel and the bottom panel are of a structure with a concave middle part, and the top panel, the side panels and the bottom panel are detachably connected.

Preferably, a switch is further arranged on the upper cover of the shell.

Preferably, the upper cover of the shell is also provided with a plurality of handles.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model provides a pair of a lithium cell device for golf cart makes 48V or higher voltage's battery device after establishing ties a plurality of lithium cell groups, guarantees battery device's small, light in weight when satisfying the required high electric quantity of golf cart.

(2) The utility model provides a pair of a lithium cell device for golf cart, a plurality of lithium cell monomers in the lithium cell group are connected through the connector component, have improved shock resistance, long service life.

(3) The utility model discloses an among some preferred schemes, use bolt and nut to couple together copper bar, electric core terminal, positive/negative pole ear and form series connection, replace the soldering technology, high temperature is to the free destruction of lithium cell when avoiding the soldering.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the specification, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic top view of the housing of the present invention;

FIG. 3 is an exploded view of the structure of the present invention;

fig. 4 is a partial enlarged view of a portion a in fig. 3 according to the present invention;

fig. 5 is a partial schematic structural diagram of the present invention;

fig. 6 is an exploded view of the battery pack according to the present invention;

fig. 7 is a schematic perspective view of a battery pack according to the present invention;

fig. 8 is a schematic perspective view of a partial structure of a battery pack according to the present invention;

fig. 9 is a schematic structural view of a connector member of the present invention;

fig. 10 is a cross-sectional view of a connector member of the present invention;

fig. 11 is a schematic structural diagram of a battery cell according to the present invention;

fig. 12 is a schematic structural view of the lithium battery cell of the present invention engaged with the connector member;

fig. 13 is a first schematic structural diagram of a cell terminal according to the present invention;

fig. 14 is a structural schematic diagram of a battery cell terminal of the present invention;

in the figure:

1. a housing;

11. an upper cover; 111. a charge-discharge negative terminal; 112. a charging positive terminal; 113. a discharge positive terminal; 114. a label; 115. a switch; 116. a handle; 12. a front cover; 13 a bottom cover;

2. a lithium battery pack;

21. a lithium battery cell; 211. a positive tab; 212. a negative tab; 213. a lithium battery projection; 22. a connector member; 221. a first groove; 222. a second groove; 223. an isolation section; 224. a connecting member; 2241. A third groove; 2242. a fourth groove; 225. a first clamping groove; 226. a first clamping protrusion; 227. a fixing member; 228. a first through hole; 23. a cell terminal; 231. a positive cell terminal; 232. a negative cell terminal; 24. copper bars; 241. a positive copper bar; 242. negative copper bars; 243. copper bars for series connection; 244. a positive input/output copper bar; 245. a negative input/output copper bar; 25. a housing; 251. a top panel; 252. A side panel; 2521. a hole; 2522. marking the polarity; 253. a bottom panel; 254. a second clamping protrusion; 255. a second clamping groove; 26. a bolt; 27. a second through hole;

3. a protective member;

31. an insulating plate; 32. a fixing plate; 321. a third through hole;

4. a screw;

5. a relay;

51. a charging relay; 52. a discharge relay;

6. a flow divider;

7. a fuse;

8. preventing resistance;

9. a preventive relay;

10. a battery protection substrate.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a more detailed description of the present invention, which will enable those skilled in the art to make and use the present invention. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1 to 6, the present invention provides a lithium battery device for a golf cart, including:

the shell 1 is a long flat block-shaped shell, the shell 1 comprises an upper cover 11, a front cover 12 and a bottom cover 13, the upper cover 11, the front cover 12 and the bottom cover 13 are detachably connected, and the upper cover 11 is provided with a charge-discharge negative electrode terminal 111, a charge positive electrode terminal 112 and a discharge positive electrode terminal 113; when the battery device is charged, the charging and discharging negative terminal 111 and the charging positive terminal 112 are connected with a charger to charge the lithium battery device; the charge and discharge negative terminal 111 and the discharge positive terminal 113 protrude out of the outer surface of the upper cover 11 and are used for being connected to a golf cart, and the charge and discharge negative terminal 111 and the discharge positive terminal 113 are connected with the golf cart so as to output voltage to the golf cart;

thirteen lithium battery packs 2 connected in series and arranged inside the shell 1 to output the electric quantity required by the golf cart;

a protection member 3 disposed between the case 1 and the lithium battery pack 2 to protect the plurality of lithium battery packs 2 connected in series;

the screw rods 4 penetrate through the lithium battery packs 2 arranged in the same row and then are locked with the nuts to fix the battery modules.

The charge and discharge negative terminal 111, the charge positive terminal 112, the discharge positive terminal 113 and the switch 13 are disposed on one side surface of the upper cover 11, three labels 114 are disposed at positions corresponding to the charge and discharge negative terminal 111, the charge positive terminal 112 and the discharge positive terminal 113, respectively, and different marks are disposed on the three labels 114 for marking and distinguishing the charge and discharge negative terminal 111, the charge positive terminal 112 and the discharge positive terminal 113.

In one embodiment, the lithium battery packs 2 include power output ends, the arrangement of the thirteen series-connected lithium battery packs 2 is that twelve of the lithium battery packs 1 are arranged in two rows and three columns every six lithium battery packs 2 to form two groups, the power output ends of the six lithium battery packs 2 in each group face in a consistent direction, the power output ends of the two groups of the lithium battery packs 2 face in opposite directions and are connected in series, a thirteenth lithium battery pack 2 is arranged in one group, and the power output ends of the thirteenth lithium battery pack are consistent with the power output ends of the other lithium battery packs 2 in the group.

As shown in fig. 7 to 14, the lithium battery pack 2 includes:

the lithium battery comprises six lithium battery monomers 21 connected in parallel, wherein each lithium battery monomer 21 comprises a positive electrode tab 211, a negative electrode tab 212 and lithium battery bulges 213 arranged on two sides of a lithium battery body respectively;

five connector members 22, said connector members 22 comprising a first groove 221, a second groove 222, a spacer 223 disposed between said first groove 221 and second groove 222; the first groove 221 and the second groove 222 are identical to the lithium battery protruding part 213 in shape and size, the first groove 221 and the second groove 222 are used for placing the lithium battery protruding part 213 on one side of the lithium battery unit 21, the lithium battery protruding part 213 can be positioned when abutting against the isolation part 223, that is, the lithium battery unit and the connector component are just in right fit, and the lithium battery protruding parts 213 of two adjacent lithium battery units 21 are isolated by the isolation part 223; the top of the connector member 22 is further provided with a connecting piece 224, two ends of the top surface of the connecting piece 224 are respectively provided with a third groove 2241, and two side surfaces of the connecting piece 224 are respectively provided with a fourth groove 2242; when the lithium battery projection 213 is just against the isolation 223, the positive/negative electrode tab of the lithium battery cell 21 is just against one side of the connector component 22;

the battery cell terminal 23 includes six battery cell terminals 23, each of the battery cell terminals 23 includes a positive battery cell terminal 231 and a negative battery cell terminal 232, as shown in fig. 13 and 14, each of the positive battery cell terminal 231 and the negative battery cell terminal 232 is composed of two L-shaped terminals to form a U-shaped battery cell terminal, each of the L-shaped terminals is attached to and connected with a positive or negative tab of the lithium battery, wherein the positive battery cell terminal 231 is respectively attached to and connected with the two positive tabs 211, and the negative battery cell terminal 232 is respectively attached to and connected with the two negative tabs 212;

the two copper bars 24, the copper bar 24 includes a positive copper bar 241 and a negative copper bar 242, the positive copper bar 241 is attached to and connected with the side surface of the positive cell terminal 231, and the negative copper bar 242 is attached to and connected with the side surface of the negative cell terminal 232, so that the parallel connection among the six lithium battery cells 21 is realized;

the shell 25 comprises a top panel 251, a side panel 252 and a bottom panel 253, wherein the top panel 251, the side panel 252 and the bottom panel 253 are detachably connected; the side panels 252 include three panels, the top panel 252 and the bottom panel 253 are of a middle concave structure, and the shape and size of the middle concave of the top panel 252 and the bottom panel 253 are consistent with the shape and size of the lithium battery protrusion 213, so that the lithium battery protrusion 213 can be clamped in the top panel/the bottom panel.

Copper bar 24 is the rake type, and including two vertically panels, a panel is the cusp, and another panel is the plane board, and the number of teeth of cusp panel is according to the figure decision of the lithium cell 21 that copper bar 24 needs to be connected, in this embodiment, lithium cell 21 is six, then copper bar 24's cusp panel has three teeth, has seted up a hole on every tooth, has seted up a hole on the plane board of copper bar 24.

The lithium battery pack 2 further comprises a bolt 26 and a nut (not shown in the figure), the nut is respectively arranged in the third groove 2241 and the fourth groove 2242, the cell terminal 23 which is respectively attached and connected with the two positive/negative electrode lugs is provided with a hole, the bolt 26 sequentially passes through the hole on the toothed panel of the positive copper bar 241 and the hole of the positive cell terminal 231 and then is connected with the nut arranged in the fourth groove 2242, the bolt 26 sequentially passes through the hole on the toothed panel of the negative copper bar 242 and the hole of the negative cell terminal 232 and is connected with the nut arranged in the fourth groove 2242, and therefore parallel connection among the six lithium battery cells 21 is achieved; the bolt 26 penetrates through a hole in the plane plate of the positive copper bar 241/negative copper bar 242 to be connected with a nut arranged in the third groove 2241, so that the current and voltage of the lithium battery pack are output; in addition, when the current and voltage of the lithium battery pack are output externally, the side panel 252 is provided with two holes 2521 corresponding to the positions of the bolt caps of the bolts 26 connected with the nuts in the third groove 2241 and an area for placing polarity marks 2522 indicating the distinguishing of the positive electrode and the negative electrode, so that the bolts 26 connected with the nuts in the third groove 2241 can be connected with other lithium battery packs in series.

The structure of the connecting piece 224 of the copper bar 24, the battery cell terminal 23, the single lithium battery 21 and the connector component 22 is matched with the clamping connection effect of the bolt and the nut to connect the positive/negative electrode ears of the single lithium battery 21 with the copper bar 24 in a laminating manner, so that the parallel connection among the six single lithium battery 21 is realized, the traditional soldering process connection is replaced, and the damage of high temperature to the single lithium battery 21 during soldering is avoided.

One side panel of the side panel 252 is further provided with a hole for exposing the panel with the hole on the copper bar 24 and an area for placing a polarity mark 2522 for indicating the distinguishing of the positive electrode and the negative electrode.

The connector member 22 is further provided with a first snap connection structure and the housing 25 is further provided with a second snap connection structure.

Block connection structure includes be equipped with a plurality of first joint recesses 225 on two relative lateral surfaces of connector component 22 respectively connector component 22 on same side connector component 22 is in between a plurality of first joint recesses 225 high dislocation arrangement, block connection structure is still including setting up connector component 22 two relative lateral surface edges and with the parallel orientation of connecting piece 224 top surface first joint recess 225 relative and the protruding 226 of first joint of shape assorted in position, five connector components 22 pass through mutual gomphosis and realization zonulae occludens between first joint recess 225 and the protruding 226 of first joint.

The clamping connection structure further includes a plurality of second clamping protrusions 254/second clamping grooves 255 which are arranged on two opposite side surfaces of the top panel 251 and the bottom panel 253 of the housing 25, correspond to and are embedded with the first clamping grooves 225/first clamping protrusions 226 of the connector component 22; the second clamping grooves 255 on the same side of the top panel 251/bottom panel 253 are staggered in height, and the clamping connection structure further comprises second clamping protrusions 254 which are arranged at the edges of the side surfaces of the top panel 251/bottom panel 253, are opposite to the second clamping grooves 255 in position and are matched in shape, so that the top panel 251 and the bottom panel 253 of the shell 25 can be clamped with the connector component 22 of the lithium battery unit 21 adjacent to the top panel 251 and the bottom panel 253 to be rapidly clamped and connected or assembled and disassembled.

In one embodiment, the connector member 22 includes a fixing member 227 disposed at the bottom of the connector member 22, and the fixing member 227 and the connecting member 224 define a plurality of first through holes 228. A plurality of second through holes 27 corresponding to the first through holes 228 are formed on two outer surfaces of the lithium battery pack case 25 perpendicular to the central axis of the first through holes 228.

The lithium battery device further comprises twelve series-connection copper bars 243, a positive electrode input and output copper bar 244 and a negative electrode input and output copper bar 245, and the thirteen lithium battery packs 2 are connected in series through the twelve series-connection copper bars and then connected with the positive electrode input and output copper bar 244 and the negative electrode input and output copper bar 245.

The protection member 3 includes an insulating plate 31 and a plurality of fixing plates 32, and the insulating plate 31 is disposed between the copper bar 243 for serial connection and the inner side wall of the housing 1, which are closely spaced and can be in contact with each other. The fixing plate 32 is respectively arranged on two outer surfaces of the lithium battery pack with the second through holes 27, third through holes 321 corresponding to the positions of the second through holes 27 on the plurality of lithium battery packs 2 covered are arranged on the fixing plate 32, the screw rod 4 sequentially penetrates through the third through holes 321 of one fixing plate, the first through holes 228, the second through holes 27 and the third through holes 321 of the other fixing plate, so that the plurality of lithium battery packs 2 are fixed among the plurality of fixing plates 32, the lithium battery device is firmer, the shock resistance of the lithium battery device is improved, and the service life of the lithium battery device can be properly prolonged.

In one embodiment, the relay 5 is further included, the relay 5 includes a charging relay 51 and a discharging relay 52, the positive input and output copper bar 244 is sequentially connected to the charging relay 51 and the discharging relay 52, the charging relay 51 is electrically connected to the charging positive terminal 112, and the discharging relay 52 is electrically connected to the discharging positive terminal 113. The charging relay 51 controls discharging by being turned on or off, and the charging relay 51 controls charging by being turned on or off.

In one embodiment, the charging and discharging device further includes a shunt 6 and a fuse 7, the negative input and output copper bar 245 is connected to the fuse 7, the fuse 7 is connected to the shunt 6, and the shunt 6 is electrically connected to the charging and discharging negative terminal 111. Fuse 7 fuses when golf car lithium battery device charging current surpasses in order to protect lithium battery device, shunt 6 is used for the detection current.

In one embodiment, the golf cart further comprises a pre-discharge resistor 8, wherein the pre-discharge resistor 8 is electrically connected with the discharge relay 52, and the prevention resistor 11 prevents a large instantaneous current from flowing back when the golf cart is braked.

In one embodiment, the device further comprises a pre-discharge relay 9, wherein the pre-discharge relay 9 is electrically connected with the discharge relay 52 and used for preventing contact sparking.

In one embodiment, the battery protection circuit board 10 is further included, a top end of the battery protection circuit board 10 is connected to an inner side surface of the upper cover 11 of the housing 1, the battery protection circuit board 10 is electrically connected to the thirteen lithium battery packs 2 through thirteen voltage collecting lines, and the battery protection circuit board 10 is electrically connected to the charging relay 51 and the discharging relay 52. The battery protection substrate 10 is used for monitoring the temperature, the current and the voltage of the lithium battery pack 2.

In one embodiment, the upper cover 11 of the housing 1 is further provided with a switch 115 for controlling input and output of the lithium battery device.

In one embodiment, the upper cover 11 of the housing 1 is further provided with a plurality of handles 116 to facilitate the taking of the lithium battery pack.

Compared with the prior art, the utility model has the advantages that,

the utility model provides a pair of a lithium cell device for golf cart makes 48V or higher voltage's battery device after establishing ties a plurality of lithium cell groups, guarantees battery device's small, light in weight when satisfying the required high electric quantity of golf cart. And a plurality of lithium battery monomers connected in parallel in the lithium battery pack are fixed in a plurality of connector components, so that the shock resistance is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the utility model can be smoothly implemented by the ordinary technicians in the industry according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. A lithium battery device for a golf cart, comprising:

the golf cart comprises a shell (1), wherein the shell (1) is in a long flat block shape, the shell (1) comprises an upper cover (11), a front cover (12) and a bottom cover (13), the upper cover (11), the front cover (12) and the bottom cover (13) are detachably connected, a charging and discharging negative terminal (111), a charging positive terminal (112) and a discharging positive terminal (113) are arranged on the upper cover (11), and the charging and discharging negative terminal (111) and the discharging positive terminal (113) protrude out of the outer surface of the upper cover (11) and are used for being connected to a golf cart;

the lithium battery packs (2) are connected in series to form a battery module and are arranged in the shell (1) to output the electric quantity required by the golf cart;

a protective member (3) disposed between the housing (1) and the battery module to protect the battery module;

the battery module comprises a plurality of screw rods (4) and nuts, wherein the screw rods (4) penetrate through a plurality of lithium battery packs (2) arranged in the same column and then are locked with the nuts so as to fix the battery module.

2. The lithium battery device for a golf cart according to claim 1, wherein the lithium battery packs (2) comprise charge outlets, the plurality of series-connected lithium battery packs (2) are divided into two groups, the plurality of lithium battery packs (2) of each group are arranged in a plurality of rows and a plurality of columns, the charge outlets of the plurality of lithium battery packs (2) of each group are oriented in a consistent manner, and the charge outlets of the plurality of lithium battery packs (2) of different groups are oriented in an opposite manner.

3. A lithium battery device for golf carts according to claim 1, characterized in that the lithium battery pack (2) comprises:

the lithium battery units (21) are connected in parallel, and each lithium battery unit (21) comprises a positive electrode tab (211) and a negative electrode tab (212);

the connector components (22) comprise a first groove (221), a second groove (222) and a separation part (223) arranged between the first groove (221) and the second groove (222), the first groove (221) and the second groove (222) are used for placing the lithium battery single bodies (21), and two adjacent lithium battery single bodies (21) are separated through the separation part (223);

the battery cell terminal comprises a plurality of battery cell terminals (23), wherein each battery cell terminal (23) comprises a positive battery cell terminal (231) and a negative battery cell terminal (232), the positive battery cell terminal (231) is connected with a positive lug (211) in an attaching mode, and the negative battery cell terminal (232) is connected with a negative lug (212) in an attaching mode;

the copper bar (24) comprises a positive copper bar (241) and a negative copper bar (242), the positive copper bar (241) is connected with the positive battery cell terminal (231), and the negative copper bar (242) is connected with the negative battery cell terminal (232), so that the parallel connection of a plurality of lithium battery monomers (21) is realized;

the shell (25), the shell (25) is installed in the outside of a plurality of series connection's lithium cell monomer.

4. The lithium battery device for the golf cart according to claim 3, wherein the copper bar (24) further comprises a plurality of copper bars for series connection (243), a positive input and output copper bar (244) and a negative input and output copper bar (245), and the plurality of copper bars for series connection (243) are used for connecting a plurality of lithium battery packs (2) in series.

5. The lithium battery device for a golf cart according to claim 3, further comprising a snap-fit connection structure, the shell (25) comprises a top panel (251) and a bottom panel (253), the clamping connection structure comprises a plurality of first clamping grooves (225) and first clamping protrusions (226) which are arranged on two opposite outer side surfaces of the connector component (22), a plurality of second clamping protrusions (254) and second clamping grooves (255) which are arranged on the top panel (251) and the bottom panel (253), the second clamping protrusion (254)/the second clamping groove (255) and the first clamping groove (225)/the first clamping protrusion (226) of the connector component (22) are corresponding in position and matched in shape, and the connector component (22), the connector component (22) and the shell (25) are connected through a clamping connection structure.

6. The lithium battery device for golf cart according to claim 5, wherein the protection member (3) comprises an insulation plate (31), a fixing plate (32), the insulation plate (31) is disposed between the power output end of the lithium battery pack (2) and the inner side wall of the housing (1), and the fixing plate (32) is disposed on the outer side of the battery module parallel to the lithium battery cells (21).

7. The lithium battery device for a golf cart according to claim 6, wherein the connector member (22) is provided with a connecting member (224) at the top end and a fixing member (227) at the bottom end, and the screw rod (4) is fastened with a nut after passing through the fixing plate (32) and a battery module arranged in the plurality of lithium battery packs (2) in the same column opposite to the position of the connecting member (224)/the fixing member (227).

8. The lithium battery device for golf cart according to claim 4, further comprising a relay (5), a pre-discharge resistor (8), a pre-discharge relay (9), the relay (5), the pre-discharge resistor (8) and the pre-discharge relay (9) are positioned between the inner side wall of the length direction of the shell (1) and the battery module, the relay (5) comprises a charging relay (51) and a discharging relay (52), the positive input and output copper bar (244) is sequentially connected with the charging relay (51) and the discharging relay (52), the pre-discharge resistor (8) and the pre-discharge relay (9) are respectively electrically connected with the discharge relay (52), the charging relay (51) is electrically connected with the charging positive terminal (112), the discharge relay (52) is electrically connected to the discharge positive terminal (113).

9. The lithium battery device for the golf cart according to claim 4, further comprising a shunt (6) and a fuse (7), wherein the negative input/output copper bar (245) is connected to the fuse (7), the fuse (7) is connected to the shunt (6), and the shunt (6) is electrically connected to the charge/discharge negative terminal (111).

10. The lithium battery device for the golf cart according to claim 8, further comprising a battery protection substrate (10), wherein the top end of the battery protection substrate (10) is connected to the inner side surface of the upper cover (11), the battery protection substrate (10) is electrically connected to the plurality of lithium battery packs (2) through a plurality of voltage collecting lines, and the battery protection substrate (10) is electrically connected to the charging relay (51) and the discharging relay (52).