CN113346184A

CN113346184A - Lithium battery module for garden tool

Info

Publication number: CN113346184A
Application number: CN202110867291.4A
Authority: CN
Inventors: 刘湘雄; 宗谱平; 王红霞; 朱耀华
Original assignee: Shenzhen World Electronic Co ltd
Current assignee: Shenzhen World Electronic Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-09-03
Anticipated expiration: 2041-07-30
Also published as: CN113346184B

Abstract

The application relates to a lithium battery module for a garden tool, which comprises a shell component and a lithium battery component; the shell assembly comprises a lower shell and an upper cover which are detachably connected, and the lithium battery assembly is arranged in the lower shell; the outer side of the shell component is provided with a dismounting structure, the dismounting structure comprises a clamping hook arranged on the upper cover and a plurality of jacks arranged on the lower shell, and the clamping hook is used for being connected with a garden tool matched with the lithium battery module for use; install electrically conductive clamp spring in the socket, electrically conductive clamp spring is provided with two clamping parts that have elasticity towards one side of socket, and two clamping parts are supported each other under the normality and are leaned on for the centre gripping is connected with the power of garden instrument that lithium cell module cooperation was used. The lithium battery module for the garden tool can conveniently replace damaged parts singly, and is favorable for prolonging the service life of the whole lithium battery module.

Description

Lithium battery module for garden tool

Technical Field

The application relates to the technical field of battery packs, in particular to a lithium battery module for a garden tool.

Background

The lithium battery refers to a battery containing lithium in an electrochemical system and comprises metallic lithium, lithium alloy, lithium ions and lithium polymer; the lithium battery converts chemical energy in the battery into electric energy through chemical reaction, so that the external equipment is powered, and the external equipment is enabled to normally operate. The voltage and capacity of a single lithium battery are small, and in order to meet the voltage and capacity requirements, the lithium batteries are generally combined into a battery pack for use.

At present, a lithium battery module in the prior art generally comprises a plurality of lithium batteries used in combination, a PCB protection board electrically connected to the lithium batteries, and a housing for mounting the lithium batteries and the PCB protection board; the outer side of the shell is provided with a socket for mounting the lithium battery module on the garden tool; the socket is internally fixed with an electric conductor which is electrically connected with the PCB protection board, so that the lithium battery supplies power to the garden tool after passing through the PCB protection board and the electric conductor.

In view of the above-mentioned related art, the inventors consider that the following drawbacks exist:

when the garden tool is used, a user installs the lithium battery module on the garden tool and supplies power to the garden tool; after garden instrument uses the completion, in order to prolong the life of lithium battery module, need dismantle lithium battery module from garden instrument usually, there is the condition that needs frequent plug lithium battery module. However, the frequent plugging of the lithium battery module easily causes the conductive body to be worn or deformed, so that the conductive stability of the lithium battery module is reduced, the conductive body after being worn or deformed is difficult to be replaced or maintained independently, the whole shell can only be scrapped, and the service life of the shell and the service life of the whole lithium battery module are reduced.

Disclosure of Invention

In order to improve lithium battery module's life, this application provides a lithium battery module for garden instrument.

The application provides a lithium battery module for garden instrument adopts following technical scheme:

a lithium battery module for a garden tool comprises a shell assembly and a lithium battery assembly installed inside the shell assembly.

The lithium battery component comprises a plurality of lithium batteries and two battery cell holders for fixing all the lithium batteries; two the electricity core seat is located the both sides of all lithium cells respectively, each one side of electricity core seat towards adjacent electricity core seat all is equipped with the standing groove that is used for placing the lithium cell.

The shell assembly comprises a lower shell and an upper cover which are detachably connected, and the lithium battery assembly is arranged in the lower shell; the outside of casing subassembly is provided with the dismouting structure, the dismouting structure is including setting up in the pothook of upper cover and setting up in a plurality of sockets of casing down, the pothook is used for being connected with the garden instrument that lithium cell module cooperation was used.

Install electrically conductive clamp spring in the socket, electrically conductive clamp spring is provided with two clamping parts that have elasticity towards one side of socket, two the clamping part normality supports each other and leans on for the centre gripping is with the power connection of the garden instrument that the lithium cell module cooperation was used.

The conductive clamp spring is provided with a spring tongue extending outwards; a PCB protection board is arranged between the lithium battery component and the upper cover at intervals, and the PCB protection board is electrically connected with the lithium battery component; the PCB protection board is provided with a positioning groove used for being matched and spliced with the spring tongue, and when the spring tongue enters the positioning groove, the conductive clamping spring is electrically connected with the PCB protection board.

Through adopting foretell technical scheme, during the lithium battery module equipment of this application, at first install all lithium cells respectively between two electricity core print seats, the both ends of lithium cell get into respectively in the standing groove of two electricity core print seats to the mounted position of preliminary fixed lithium cell.

Secondly, the lithium battery component is arranged in the lower shell, and then the conductive clamping spring is arranged in the lower shell, so that two clamping parts of the conductive clamping spring are right opposite to the socket of the lower shell; when garden instrument's power connection inserted the socket, two clamping parts of electrically conductive clamp spring can be crowded to the power connection, and two clamping parts can centre gripping power connection jointly this moment.

Then, be fixed in the PCB protection shield on being close to the electric core seat of lower casing opening part, the tongue of electrically conductive clamp spring can match the constant head tank that inserts the PCB protection shield this moment in, the PCB protection shield can spacing electrically conductive clamp spring jointly with lower casing this moment. The installed PCB protection board is respectively electrically connected with the conductive clamp spring and the lithium battery component, so that voltage generated by the lithium battery can be transmitted to the garden tool, and power is supplied to the garden tool; meanwhile, the PCB protection board has the effect of protecting the lithium battery, the over-discharge of the lithium battery is reduced, and the service life of the lithium battery is prolonged.

After the lithium ion electronic module is repeatedly pulled out and inserted, the two clamping parts are easy to deform, so that the clamping force between the two clamping parts is weakened; at the moment, the PCB protection board is detached from the electric core seat, the conductive clamping spring is separated from the positioning groove, the conductive clamping spring can be directly taken out of the lower shell, and further the conductive clamping spring can be conveniently maintained or replaced, so that the two clamping parts of the conductive clamping spring have good clamping capacity again, and the conduction performance between the power supply connector and the lithium battery is ensured; the damage to the lower shell can not be caused in the maintenance process, the service life of the lower shell is prolonged, and the service life of the whole lithium battery module is prolonged.

In addition, if PCB protection shield, electric core seat or lithium cell appear damaging when, through dismantling the PCB protection shield, also can conveniently take out electric core seat and lithium cell to carrying out the single section to the position of damaging and changing, being favorable to reducing the cost of maintenance of lithium cell module, also being favorable to prolonging the holistic life of lithium cell module.

Optionally, a cell holder close to the upper cover in the two cell holders is an upper cell holder, and a stand column for fixing the PCB protection board is arranged on one side of the upper cell holder facing the upper cover; an insulating plate is arranged between the upper die holder and the PCB protective plate.

By adopting the technical scheme, after the PCB protection board is fixed on the upright post, the distance between the upper die holder and the PCB protection board is increased, and the condition of short circuit caused by local conduction between the upper die holder and the PCB protection board can be reduced; the insulating board further improves the insulating property between the upper battery cell holder and the PCB protection board, further reduces the short circuit between the upper battery cell holder and the PCB protection board, and reduces the possibility of burning out the lithium battery.

Optionally, two opposite sides of the upper cover are respectively provided with a tab; the number of the clamping hooks is two, and the two clamping hooks are respectively positioned on the opposite sides of the two lugs.

A limiting part for fixing the upper cover is arranged between the two lugs; the outer side of the lower shell is provided with a connecting seat, and the connecting seat is provided with a limiting groove matched with the limiting part.

Two opposite sides of the connecting seat are respectively provided with a first abdicating groove for the clamping hook to deform under pressure, and each first abdicating groove is opposite to the clamping hook; the two adjacent sides of the lower shell and the abdicating groove are respectively provided with a second abdicating groove for the pressure deformation of the ear, and each second abdicating groove is opposite to the ear.

Through adopting foretell technical scheme, realize the upper cover and be connected with dismantling of casing down through the cooperation of spacing portion and spacing groove, make the upper cover can conveniently install in casing down. The two lugs of the upper cover are respectively positioned at the outer sides of the two second abdicating grooves after being installed, and the second abdicating grooves are used for providing deformation spaces for the lugs; the two clamping hooks are respectively positioned at the outer sides of the two first yielding grooves, and the first yielding grooves are used for providing deformation space for the clamping hooks; when installing the garden instrument and dismantling in lithium battery module, make the lobe get into the second through the extrusion lobe and step down the inslot, can drive the pothook and remove in to the first inslot that steps down, make things convenient for the installation and the dismantlement of garden instrument.

Optionally, a plurality of structure grooves are formed in the outer side of the tab, and all the structure grooves form a damping surface which is convenient for inserting and pulling the upper cover.

Through adopting foretell technical scheme, the setting of damping surface is used for improving the frictional resistance between hangers and people's finger, makes things convenient for the plug of upper cover to casing under can conveniently pulling out the upper cover when carrying out the single section change to the part that damages, further improve the convenience of maintenance operation.

Optionally, an installation plate is fixed on one side of the connection seat close to the upper cover, a plurality of partition plates are fixed on one side of the installation plate facing the upper cover, and an installation chamber for installing the conductive clamp spring is formed between each adjacent partition plate and the installation plate; the socket is arranged on the connecting seat and communicated with the mounting chamber.

By adopting the technical scheme, the installation chamber formed between the adjacent partition plates and the installation plate is used for pre-fixing the installation position of the conductive clamp spring, so that the spring tongue of the conductive clamp spring can be conveniently and correspondingly inserted into the positioning groove of the PCB protection plate during the subsequent installation of the PCB protection plate, and the convenience in assembling the lithium-ion electronic module is improved.

Optionally, one side of each partition board facing to the adjacent partition board is rotatably connected with a positioning rod; and an elastic piece used for enabling the positioning rod to abut against the outer side of the clamping part is arranged between the positioning rod and the connected partition plate.

By adopting the technical scheme, after the conductive clamping spring is arranged in the mounting chamber, the positioning rod is normally abutted against the clamping parts of the conductive clamping spring under the action of the elastic piece, so that the two clamping parts can be tightly abutted against the power connector when the power connector of the garden tool is inserted into the socket, and the conductive stability is improved; in addition, the positioning rod can also reduce the possibility that the two clamping parts deform towards the direction away from each other, so that the two clamping parts can keep good clamping capacity, and the service life of the lithium battery module can be prolonged.

Optionally, the sum of the axial lengths of two positioning rods in the same installation chamber is greater than the distance between the two partition plates; when the positioning rod is abutted against the outer side of the clamping part, the positioning rod is obliquely arranged in the direction away from the spring tongue.

Through adopting foretell technical scheme, the locating lever normality sets up to the direction slope of keeping away from the reed, when people maintain lithium cell module, dismantle the PCB protection shield when dismantling the electric core seat, the locating lever can play the effect of the electrically conductive clamp spring of location for electrically conductive clamp spring still stays in the installation room, has reduced electrically conductive clamp spring and PCB protection shield and has been torn open the possibility of casing down together, makes things convenient for the reinstallation of completion back to the PCB protection shield.

Optionally, a plurality of clamping structures are arranged on the outer side of the PCB protection plate, each clamping structure comprises two clamping pieces symmetrically arranged on the outer side of the socket, and each clamping piece is a conducting strip; when the spring tongue is inserted into the socket, the two clamping pieces clamp the spring tongue together.

By adopting the technical scheme, after the PCB protection board is fixed, the spring tongue of the conductive clamping spring can be inserted into the positioning groove in a matching manner and clamped by the two clamping pieces on the two sides of the positioning groove together; the two clamping pieces are conducting strips, so that the circuit conduction area between the spring tongue and the PCB protection board is increased, the conducting stability is further improved, and the phenomenon of local overheating caused by the fact that the circuit conduction area between the spring tongue and the PCB protection board is too small can be reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the internal components of the lithium battery module are damaged, the upper cover and the PCB protection board are disassembled from the lower shell, so that the damaged conductive clamp spring, the cell holder and the lithium battery can be conveniently replaced by a single section, and the service life of the whole lithium battery module is prolonged;

2. the first abdicating groove is arranged as a clamping hook deformation space, and the second abdicating groove is arranged as a lug deformation space; the lug is elastically deformed by extruding the lug, so that the garden tool can be conveniently installed on the lithium battery module or can be conveniently detached from the lithium battery module;

3. through setting up the installation position of installation room pre-fixing electrically conductive clamp spring, can conveniently insert the tongue of electrically conductive clamp spring in the constant head tank of PCB protection shield correspondingly when the installation of follow-up PCB protection shield, improve the convenience of lithium-ion electronic module equipment.

Drawings

Fig. 1 is an overall structural view of a lithium battery module according to embodiment 1 of the present application;

fig. 2 is an exploded view of a lithium battery module according to embodiment 1 of the present application;

FIG. 3 is a schematic structural view of a lower case in embodiment 1 of the present application;

FIG. 4 is a schematic structural view of an upper cover in embodiment 1 of the present application;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 6 is a schematic view of the installation between the PCB protection board and the lithium battery in embodiment 1 of the present application;

fig. 7 is a schematic structural view of a conductive clamp spring according to embodiment 1 of the present application;

FIG. 8 is a schematic structural view of a lower case in embodiment 2 of the present application;

FIG. 9 is an enlarged view at B in FIG. 8;

fig. 10 is a schematic structural diagram of a PCB protection board in embodiment 2 of the present application.

Description of reference numerals: 1. a housing assembly; 11. an upper cover; 111. a pendant ear; 112. a hook; 113. a limiting plate; 114. a limiting part; 115. a threaded hole; 116. constructing a groove; 12. a lower housing; 121. a second abdicating groove; 13. a connecting seat; 131. a clamping part; 1311. a first abdicating groove; 132. a connecting portion; 1321. mounting a plate; 1322. a limiting groove; 1323. a partition plate; 1324. positioning a rod; 1325. an elastic member; 133. a socket; 2. a lithium battery pack; 21. a lithium battery; 22. an electrical core print; 221. a placement groove; 23. a column; 231. positioning holes; 3. an installation chamber; 4. a conductive clamp spring; 41. a clamping portion; 42. a spring tongue; 5. a PCB protection board; 51. positioning a groove; 52. a clamping structure; 521. a clip; 6. an insulating plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-10.

Example 1

The embodiment of the application discloses a lithium battery module for garden instrument.

Referring to fig. 1 and 2, the lithium battery module for the garden tool includes a housing assembly 1 and a lithium battery assembly 2 installed inside the housing assembly 1 for supplying power to the garden tool.

Referring to fig. 2, the lithium battery pack 2 includes a plurality of lithium batteries 21 and two battery holders 22 for fixing the lithium batteries 21, and the number of the lithium batteries 21 in the lithium battery pack 2 may be three, four, or five, which is determined according to the rated voltage of the garden tool used with the lithium battery pack. In the embodiment, the number of the lithium batteries 21 is four, and the four lithium batteries 21 are connected in series and in parallel and then have working voltages adapted to the garden tool.

Referring to fig. 2, the four lithium batteries 21 in the present embodiment are all cylindrical batteries, and two battery cell holders 22 are respectively located at two ends of the lithium batteries 21; four placing grooves 221 are formed in one side, facing the lithium battery 21, of each battery cell holder 22, and two ends of each lithium battery 21 are correspondingly installed in the placing grooves 221 of the battery cell holders 22 on two sides, so that the installation position of the lithium battery 21 is fixed.

Referring to fig. 2 and 3, the housing assembly 1 includes an upper cover 11 and a lower housing 12 detachably connected to each other, wherein the lower housing 12 is a hollow housing with one side open, and the installed lithium battery 21 and the two battery cartridges 22 can be installed inside the lower housing 12 through the open. The outer side of the lower shell 12 is integrally provided with a connecting seat 13; the connecting base 13 includes two parallel clamping portions 131 and a connecting portion 132 vertically connected to the two clamping portions 131, the connecting portion 132 is located at one side of the extending direction of the clamping portions 131, so that the whole connecting base 13 is U-shaped; wherein the connecting portion 132 is adjacent to the opening.

Referring to fig. 3, the cross-sectional shape of the clamping portion 131 along the extension direction thereof in this embodiment is set to be "L" shape, and is used for preliminarily clamping the garden tool used in cooperation with the lithium battery module, so as to preliminarily fix the garden tool; connecting portion 132 is close to open one side and is equipped with open one side and flush the setting with lower casing 12, and connecting portion 132 is close to open one side integrated into one piece and is provided with mounting panel 1321 for mounting panel 1321 is higher than lower casing 12 and is equipped with open one side.

Referring to fig. 2 and 4, two tabs 111 are integrally formed on one side of the upper cover 11 facing the lower housing 12, and the two tabs 111 are symmetrically disposed on two opposite sides of the upper cover 11; a plurality of structure grooves 116 are formed in one side of each lug 111, which is away from the adjacent lug 111, and all the structure grooves 116 form a damping surface together, so that the friction force between the lugs 111 and the fingers of a user is increased, and the user can hold the upper cover 11 and install and detach the upper cover 11 conveniently.

Referring to fig. 3 and 4, a limiting plate 113 is integrally formed between the two lugs 111, two limiting portions 114 are integrally formed outside the limiting plate 113, and the two limiting portions 114 are respectively located at two sides of the limiting plate 113 in the extending direction. The mounting plate 1321 is provided with two limiting grooves 1322 adapted to the two limiting parts 114; when the upper cover 11 covers the opening of the lower shell 12, the limiting part 114 can be clamped into the limiting groove 1322, so that the upper cover 11 is detachably connected with the lower shell 12; the upper cover 11 is further opened with a threaded hole 115, and the upper cover 11 can be fixed in an auxiliary manner by using a bolt to pass through the threaded hole 115 and be fixed to the lower housing 12, so as to improve the connection stability of the upper cover 11 and the lower housing 12.

Referring to fig. 3 and 5, when the upper cover 11 is covered on the lower housing 12, the two tabs 111 partially cover two opposite sides of the lower housing 12, respectively; in this application, the second abdicating groove 121 has been seted up respectively on two opposite sides of lower casing 12, and two second abdicating grooves 121 are respectively just right to two ears 111 for provide the space of deformation for ears 111.

Referring to fig. 1, the outer side of the housing assembly 1 is provided with a dismounting structure, which includes a hook 112 for connecting with a garden tool and a plurality of sockets 133 for matching with power connectors of the garden tool.

Referring to fig. 3 and 4, two hooks 112 are provided, the two hooks 112 are respectively located on opposite sides of the two tabs 111, and each hook 112 is exposed on one side of the tab 111 away from the upper cover 11. The opposite sides of the two clamping portions 131 are respectively provided with a first abdicating groove 1311. Referring to fig. 5, when the upper cover 11 is covered on the lower housing 12, the two first avoiding grooves 1311 respectively face the two hooks 112, so as to provide a space for deformation of the hooks 112.

Referring to fig. 5, when the garden tool is installed in the lithium battery module, the two tabs 111 are deformed by squeezing the two tabs 111 and enter the second abdicating groove 121, so that the hooks 112 can be driven to enter the first abdicating groove 1311, and the garden tool can be conveniently clamped into the clamping portion 131; after the external force acting on the tab 111 is removed, the tab 111 resets and leaves the second abdicating groove 121, and then the hook 112 is driven to leave the first abdicating groove 1311, so that the hook 112 is hooked with the garden tool, and the stability of the garden tool when being mounted on the lithium battery module is improved.

Referring to fig. 5 and 6, in the present embodiment, the number of the sockets 133 is four, the four sockets 133 are arranged at equal intervals along the extending direction of the connecting portion 132, and each socket 133 partially penetrates through the connecting portion 132 and the mounting plate 1321; a plurality of partition plates 1323 are integrally formed on one side of the mounting plate 1321 facing the lower shell 12, all the partition plates 1323 are arranged at equal intervals along the extension direction of the mounting plate 1321, so that mounting chambers 3 are formed between the adjacent partition plates 1323 and the mounting plate 1321, and each socket 133 is communicated with one mounting chamber 3; when the garden tool is mounted on the lithium battery module, the power plug of the garden tool can be inserted into each socket 133.

Referring to fig. 6 and 7, each installation chamber 3 is installed with a conductive clamping spring 4, one side of the conductive clamping spring 4 facing the socket 133 is integrally formed with two elastic clamping portions 41, and the two clamping portions 41 are abutted against each other in a normal state; when a power plug is inserted into the outlet 133, the two holding portions 41 can collectively hold the power plug. All electrically conductive clamp springs 4 are connected with PCB protection shield 5 jointly, and PCB protection shield 5 and lithium battery pack 2 electric connection to can supply power for garden instrument when garden instrument installs in lithium battery module, make garden instrument can function.

Referring to fig. 6, in the present embodiment, a cell holder 22 close to the upper cover 11 of the two cell holders 22 is set as an upper cell holder, and the PCB protection board 5 is located between the upper cell holder and the upper cover 11; go up the core print and be provided with a plurality of stands 23 towards one side integrated into one piece of upper cover 11, the locating hole 231 has all been seted up to each stand 23, and PCB protection shield 5 passes through the bolt fastening in the locating hole 231 of stand 23 for interval setting between PCB protection shield 5 and the last core print.

Referring to fig. 6 and 7, one side of each conductive clip spring 4, which is away from the clamping portion 41, is provided with a tongue 42 extending outward, and the tongue 42 and the conductive clip spring 4 are integrally formed; the PCB protection board 5 is provided with a positioning groove 51 matched with the spring tongue 42, and when the PCB protection board 5 is fixed on the upright post 23, the spring tongue 42 of the conductive clamp spring 4 can be correspondingly inserted into the positioning groove 51; this application sets up the cell wall of constant head tank 51 into the electrically conductive station of PCB protection shield 5, and is transition fit between tongue 42 and the constant head tank 51 for tongue 42 can support the cell wall of tight constant head tank 51 after entering constant head tank 51, and then makes to have good conductivity between tongue 42 and the constant head tank 51 cell wall, improves the electrically conductive stability when the lithium cell module supplies power for the garden instrument.

Referring to fig. 6, an insulating plate 6 is arranged between the upper die pad and the PCB protective plate 5, and the column 23 penetrates through the insulating plate 6; the insulating plate 6 is used for improving the insulating property between the upper battery cell holder and the PCB protection board 5, so that the short circuit between the upper battery cell holder and the PCB protection board 5 can be reduced, and the possibility of burning out of the lithium battery 21 is reduced.

The implementation principle of the embodiment 1 of the application is as follows:

when the lithium battery module is assembled, the four lithium batteries 21 are respectively arranged between the two battery cell holders 22, and then the battery cell holders 22 and the lithium batteries 21 are placed in the lower shell 12 together; the insulation board 6 is arranged on the upper core print seat, then the PCB protection board 5 is fixed on the upright post 23 of the core print seat 22, and at the moment, the spring tongue 42 of the conductive clamp spring 4 is inserted into the positioning groove 51 of the PCB protection board 5 in a matching way; and finally, covering the upper cover 11 on the lower shell 12, so that the limiting part 114 of the upper cover 11 is matched and clamped in the limiting groove 1322, and then fixing the upper cover 11 and the lower shell 12 by using bolts to complete the assembly of the lithium battery module.

When the garden tool is installed on the lithium battery module, the garden tool can be matched and clamped with the clamping portion 131, and meanwhile, the garden tool can be hooked with the clamping hook 112; at this time, the power plug of the garden tool can be inserted into the socket 133, so that the two clamping portions 41 of the conductive clamping spring 4 clamp the power plug together, thereby enabling the lithium battery 21 to supply power to the garden tool.

When the inside electrically conductive clamp spring 4 of lithium battery module, PCB protection shield 5, battery core seat 22 or lithium cell 21 appear damaging, shell 12 under 11 dismantlements of upper cover, then the battery core seat on 5 dismantlements of PCB protection shield, can take out battery core seat 22 and lithium cell 21 from shell 12 down to can conveniently carry out the single festival change to the part of damage, reduce the cost of maintenance of lithium battery module, also be favorable to prolonging the holistic life of lithium battery module.

Example 2

Referring to fig. 8 and 9, the lithium battery module for a garden tool disclosed in the embodiment of the present application is different from embodiment 1 in that:

in this embodiment, each partition 1323 is rotatably connected to two positioning rods 1324 on one side facing the adjacent partition 1323, that is, four positioning rods 1324 are provided in one installation chamber 3; one end of each locating rod 1324, which is far away from the partition 1323, is provided with an integrally formed ball head; an elastic member 1325 is arranged between each locating rod 1324 and the partition 1323 connected with the locating rod 1324, and the two opposite locating rods 1324 are normally close to each other under the elastic force of the elastic member 1325, so that the ball heads of the two locating rods 1324 are abutted against each other.

Referring to fig. 8 and 9, the elastic member 1325 may be a spring, a rubber pad, or an elastic sponge, but may generate an elastic force that acts on the positioning rod 1324 to press the positioning rod 1324 against the adjacent positioning rod 1324; the elastic member 1325 in this embodiment is configured as a rubber pad, which has good insulating ability and is beneficial to improving the insulating property between the conductive clamp spring 4 and the lower housing 12. One side of the rubber pad is fixedly bonded to the partition 1323, and the other side of the rubber pad is sleeved on the positioning rod 1324.

Referring to fig. 8 and 9, the axial length of the two opposing retainer rods 1324 in the same mounting chamber 3 is greater than the distance between the two partition plates 1323; when the ball heads of the two positioning rods 1324 abut against each other by the two positioning rods 1324 under the action of the elastic member 1325, the two positioning rods 1324 are inclined in a direction approaching the connecting portion 132. When the conductive clamp spring 4 is installed, the conductive clamp spring 4 needs to be installed into the installation chamber 3 from the side of the partition 1323 away from the installation plate 1321, and after the conductive clamp spring 4 is installed, the ball heads of the two positioning rods 1324 can respectively abut against the two clamping portions 41 of the conductive clamp spring 4.

Referring to fig. 9 and 10, a plurality of clamping structures 52 are disposed on a side of the PCB protection board 5 away from the lower housing 12, the number of the clamping structures 52 is equal to the number of the positioning slots 51, and each clamping structure 52 is located outside the positioning slot 51. Each clamping structure 52 includes two clamping pieces 521, the two clamping pieces 521 are symmetrically disposed on two sides of the positioning slot 51 in the width direction, and each clamping piece 521 is welded to the PCB protection board 5. Each clamping piece 521 is arc-shaped, and the arc-shaped surfaces of the two clamping pieces 521 are mutually abutted; after the PCB protection board 5 is fixed to the vertical column 23, the latch 42 is correspondingly inserted into the positioning slot 51 and enters between the two clips 521, so that the two clips 521 commonly clip the latch 42.

Referring to fig. 9 and 10, in the present application, the clamping pieces 521 are provided as conductive sheets, and the clamping pieces 521 are conducted with the conductive stations of the adjacent positioning grooves 51, when the tongue 42 is inserted into the positioning groove 51, the two clamping pieces 521 are abutted against the tongue 42 together, so that the circuit conduction area between the tongue 42 and the PCB protection board 5 is increased, the conductive stability is further increased, and the phenomenon of local overheating caused by the excessively small circuit conduction area between the tongue and the PCB protection board 5 can be reduced.

The implementation principle of embodiment 2 of the present application is as follows:

when the conductive clamp spring 4 is installed in the installation chamber 3, the two positioning rods 1324 approach each other under the action of the elastic member 1325 and respectively abut against the two clamping portions 41 of the conductive clamp spring 4; when a power plug of the garden tool is inserted into the socket 133 and enters between the two clamping parts 41, the positioning rod 1324 can improve the clamping force of the two clamping parts 41 on the power plug, and improve the stability of electric conduction; the locating rod 1324 can also reduce the possibility that two clamping parts 41 deform towards the direction of keeping away from each other, so that the two clamping parts 41 keep good clamping capacity, and the service life of the lithium battery module is prolonged.

When the components in the lithium battery module are damaged and need to be maintained, the upper cover 11 and the PCB protection board 5 need to be detached; when the positioning slot 51 of the PCB protection board 5 is separated from the spring tongue 42, the positioning rod 1324 can reduce the possibility that the conductive clip spring 4 is taken up by the PCB, so that the conductive clip spring 4 is still left in the installation chamber 3, and the PCB is conveniently reinstalled after maintenance is completed.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a lithium battery module for garden instrument which characterized in that: comprises a shell component (1) and a lithium battery component (2) arranged in the shell component (1);

the lithium battery component (2) comprises a plurality of lithium batteries (21) and two battery cell holders (22) used for fixing all the lithium batteries (21); the two electric core seats (22) are respectively positioned at two sides of all the lithium batteries (21), and a placing groove (221) for placing the lithium batteries (21) is formed in one side, facing to the adjacent electric core seat (22), of each electric core seat (22);

the shell assembly (1) comprises a lower shell (12) and an upper cover (11) which are detachably connected, and the lithium battery assembly (2) is arranged inside the lower shell (12); the outer side of the shell component (1) is provided with a dismounting structure, the dismounting structure comprises a clamping hook (112) arranged on the upper cover (11) and a plurality of sockets (133) arranged on the lower shell (12), and the clamping hook (112) is used for being connected with a garden tool matched with the lithium battery module for use;

a conductive clamping spring (4) is installed in the socket (133), two elastic clamping parts (41) are arranged on one side, facing the socket (133), of the conductive clamping spring (4), the two clamping parts (41) are normally abutted against each other and are used for clamping a power connector of a garden tool used in cooperation with the lithium battery module;

the conductive clamping spring (4) is provided with a spring tongue (42) extending outwards; a PCB protection board (5) is arranged between the lithium battery component (2) and the upper cover (11) at intervals, and the PCB protection board (5) is electrically connected with the lithium battery component (2); the PCB protection board (5) is provided with a positioning groove (51) which is used for being matched and spliced with the spring tongue (42), and when the spring tongue (42) enters the positioning groove (51), the conductive clamp spring (4) is electrically connected with the PCB protection board (5).

2. The lithium battery module for garden tools according to claim 1, wherein: a battery cell seat (22) close to the upper cover (11) in the two battery cell seats (22) is arranged as an upper battery cell seat, and one side of the upper battery cell seat facing the upper cover (11) is provided with a stand column (23) for fixing a PCB protection board (5); an insulating plate (6) is arranged between the upper core seat and the PCB protective plate (5).

3. The lithium battery module for garden tools according to claim 1, wherein: two opposite sides of the upper cover (11) are respectively provided with a lug (111); the number of the clamping hooks (112) is two, and the two clamping hooks (112) are respectively positioned at the opposite sides of the two lugs (111);

a limiting part (114) used for fixing the upper cover (11) is arranged between the two lugs (111); a connecting seat (13) is arranged on the outer side of the lower shell (12), and a limiting groove (1322) matched with the limiting part (114) is formed in the connecting seat (13);

two opposite sides of the connecting seat (13) are respectively provided with a first yielding groove (1311) for the clamping hook (112) to deform under pressure, and each first yielding groove (1311) is opposite to the clamping hook (112); the two adjacent sides of the lower shell (12) and the abdicating groove are respectively provided with a second abdicating groove (121) for the compression deformation of the lug (111), and each second abdicating groove (121) is opposite to the lug (111).

4. The lithium battery module for garden tools according to claim 3, wherein: the outer side of the lug (111) is provided with a plurality of structural grooves (116), and all the structural grooves (116) form a damping surface which is convenient for plugging and unplugging the upper cover (11) together.

5. The lithium battery module for garden tools according to claim 3, wherein: a mounting plate (1321) is fixed on one side, close to the upper cover (11), of the connecting seat (13), a plurality of partition plates (1323) are fixed on one side, facing the upper cover (11), of the mounting plate (1321), and a mounting chamber (3) for mounting the conductive clamp spring (4) is formed between the adjacent partition plates (1323) and the mounting plate (1321); the socket (133) is arranged on the connecting seat (13) and communicated with the mounting chamber (3).

6. The lithium battery module for garden tools according to claim 5, wherein: one side of each partition plate (1323) facing to the adjacent partition plate (1323) is rotatably connected with a positioning rod (1324); an elastic piece (1325) used for enabling the locating rod (1324) to abut against the outer side of the clamping part (41) is installed between the locating rod (1324) and the connected partition plate (1323).

7. The lithium battery module for garden tools according to claim 6, characterized in that: the sum of the axial lengths of two positioning rods (1324) positioned in the same mounting chamber (3) is greater than the distance between the two partition plates (1323); when the positioning rod (1324) abuts against the outer side of the clamping part (41), the positioning rod (1324) is obliquely arranged in a direction away from the spring tongue (42).

8. The lithium battery module for garden tools according to claim 1, wherein: a plurality of clamping structures (52) are arranged on the outer side of the PCB protection plate (5), each clamping structure (52) comprises two clamping pieces (521) symmetrically arranged on the outer side of the positioning groove (51), and each clamping piece (521) is a conducting strip; when the spring tongue (42) is inserted into the positioning groove (51), the two clamping pieces (521) clamp the spring tongue (42) together.