CN220290969U

CN220290969U - PTC external module lithium battery

Info

Publication number: CN220290969U
Application number: CN202321860840.6U
Authority: CN
Inventors: 金凯荣; 徐爽; 张�林
Original assignee: Shihlien Chemical Industrial Jiangsu Co
Current assignee: Shilian Special Battery Energy Huai'an Co ltd
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2024-01-02
Anticipated expiration: 2033-07-17

Abstract

The utility model relates to a lithium battery with a PTC external module, and belongs to the technical field of lithium batteries. The battery module comprises a sleeve template which is arranged in an up-down symmetrical mode, and a plurality of single batteries are distributed among the sleeve templates in a matrix mode. According to the utility model, the loading assembly is arranged on the side wall of the shell and is used for conveniently assembling the PTC thermistor, so that the battery is protected from spontaneous combustion during use and charging in high-temperature weather, the safety of the battery is improved, and the use safety of a user is ensured.

Description

PTC external module lithium battery

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a PTC external module lithium battery.

Background

Lithium power batteries are new high-energy batteries that have been successfully developed in the 20 th century. The negative electrode of this battery is lithium metal, mnO2 for positive electrode, SOCL2, (CFX) n, etc. Practical use is made of the 70 s. The battery has the advantages of high energy, high battery voltage, wide working temperature range, long storage life and the like, and is widely applied to small-sized electric appliances for military use and civil use, such as mobile phones, portable computers, video cameras, cameras and the like. Along with the popularization of new energy sources, the lithium power battery is widely applied to electric automobiles and electric automobiles.

At present, when a traditional lithium power battery is used on an electric vehicle, the lithium power battery is assembled into a battery module by a plurality of single batteries and is sleeved in a shell. The assembly of a plurality of single batteries in the existing battery module either adopts integral cladding, or fixes the two ends of the single batteries with die sleeves, the former is inconvenient when the battery module is maintained, the side edge of the latter has no constraint force, and after the phenomenon that the die sleeves are broken due to jolt, the single batteries are easy to deviate, so that the single batteries are damaged. Moreover, the conventional lithium power battery lacks a PTC thermistor, and thus there is a risk of spontaneous combustion of the battery when the electric vehicle is driven or charged in a high temperature weather state.

Therefore, how to process lithium batteries is a technical problem that the skilled person needs to solve at present.

Disclosure of Invention

The utility model aims to solve the problems in the background technology and provides a PTC external module lithium battery.

The technical scheme of the utility model is as follows: the lithium battery comprises a battery main body formed by a shell and a battery module, wherein the shell comprises a shell part, two ends of the shell part are respectively connected with a bottom end plate and a top end cover through screws, a loading assembly is fixedly connected to the outer wall of the back of the shell part, and a TPC thermistor main body for protecting the battery main body is loaded on the loading assembly;

the battery module comprises sleeve templates which are arranged up and down symmetrically, a plurality of single batteries are distributed among the sleeve templates in a matrix mode, a die frame for auxiliary fixing is arranged among the sleeve templates symmetrically, and the die frame is assembled through a clamping assembly;

the die frame comprises a side frame I and a side frame II, the clamping assembly comprises a connector welded at the two end parts of the side frame II, a cavity is formed in the connector, movable plates are symmetrically arranged in the cavity up and down, a limit rod and a wedge block I are arranged on one sides, close to each other, of the movable plates, a wedge block II is arranged between the wedge blocks I, and a movable rod used for adjusting is fixedly connected to the side wall of the wedge block II.

Preferably, the side of symmetry the movable plate that keeps away from each other all is provided with spring one, and the one end of keeping away from the movable plate of spring one is fixed connection on the inner wall of cavity.

Preferably, one end of the movable rod, which is far away from the second wedge block, penetrates through the side wall of the cavity, a handle is arranged on the movable rod, and the second spring for resetting and adjusting is sleeved on the movable rod.

Preferably, the shell part comprises a shell, guide plate groups are arranged on the front outer wall and the rear outer wall of the shell, a frame body used for supporting the battery module is fixedly connected to the inside of the shell, and a converter main body located inside the shell is installed on the right side of the frame body.

Preferably, a rectifying component is arranged on the inner wall of the bottom end plate, and the rectifying component is electrically connected with the converter main body.

Preferably, the loading assembly comprises a loading plate fixedly connected to the outer wall of the back of the shell, a movable cavity is formed in the loading plate, a worm is connected in the movable cavity in a rotating mode, a worm wheel is arranged on the side edge of the worm, and a bidirectional screw rod is mounted on the worm wheel.

Preferably, the two sides of the worm wheel are respectively sleeved with an inner thread ring positioned on the two-way screw rod, and the outer ring of the inner thread ring is movably connected with a stay bar.

Preferably, a plurality of stay bars are kept away from the one end of interior line ring and all install the fixing base through the locating pin, and a plurality of the fixing base is kept away from the stay bar one side be connected with jointly and is used for extrudeing fixed grip block.

Preferably, one end of the back surface of the worm penetrates through the back shell wall of the movable cavity, and a handle is arranged on the worm.

Compared with the prior art, the utility model has the following beneficial technical effects:

1. the die sleeve assembly in the battery module is used for assembling a plurality of single batteries, the side edge in the die sleeve assembly is provided with the fixing frame, and then the side edge of the battery module is provided with the constraint force, so that when the upper die sleeve body and the lower die sleeve body in the die sleeve assembly are prevented from being broken, the single batteries are offset and misplaced in the bumping running process of the electric vehicle, and the service life of the single batteries is further guaranteed.

2. Through set up the loading subassembly on the lateral wall of shell for to PTC thermistor's convenient assembly, and then to the use and the protection that charges of battery under high temperature weather, prevent that the spontaneous combustion phenomenon of battery from producing, improve its security, ensure user's safety in utilization.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the axial side view of FIG. 1;

FIG. 3 is a schematic view in partial cross-section of the loading assembly of FIG. 2;

fig. 4 is a schematic view of a partial battery module structure of fig. 1.

Reference numerals: 1. a housing; 11. a shell member; 111. a housing; 112. a guide plate group; 113. a frame; 12. a bottom end plate; 13. a rectifying member; 14. a transducer body; 15. a top end cap; 16. a loading assembly; 161. a loading plate; 162. a worm; 163. a worm wheel; 164. a two-way screw rod; 165. a brace rod; 166. a clamping plate; 17. a TPC thermistor body; 2. a battery module; 21. sleeving a template; 22. a side frame I; 23. a second side frame; 24. a clamping assembly; 241. a connector; 242. a moving plate; 243. a first spring; 244. a wedge block I; 245. a wedge II; 246. a movable rod.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

Example 1

As shown in fig. 1, 2 and 4, the PTC external module lithium battery provided by the present utility model comprises a battery body composed of a housing 1 and a battery module 2, wherein the housing 1 comprises a housing part 11, two ends of the housing part 11 are respectively connected with a bottom end plate 12 and a top end cover 15 through screws, a loading assembly 16 is fixedly connected to the outer wall of the back of the housing part 11, and a TPC thermistor body 17 for protecting the battery body is loaded on the loading assembly 16;

the battery module 2 comprises sleeve templates 21 which are arranged up and down symmetrically, a plurality of single batteries are distributed among the symmetrical sleeve templates 21 in a matrix mode, and a die frame for auxiliary fixing is further arranged among the symmetrical sleeve templates 21 and assembled through a clamping assembly 24;

the mold frame comprises a first side frame 22 and a second side frame 23, the clamping assembly 24 comprises a connector 241 welded at the end part of the second side frame 23, a cavity is formed in the connector 241, a movable plate 242 is symmetrically arranged in the cavity up and down, a limiting rod and a first wedge block 244 are arranged on one side, close to each other, of the symmetrical movable plate 242, a second wedge block 245 is arranged among the first wedges 244, and a movable rod 246 for adjusting is fixedly connected to the side wall of the second wedge block 245.

In this embodiment, the bottom end plate 12 is provided with a discharge end, and the top end cover 15 is provided with a charge end.

In this embodiment, the top and bottom of the end of the first side frame 22, which is close to the clamping component 24, are inclined planes, and a limiting groove for plugging and fixing the limiting rods is formed, one end of each limiting rod, which is close to the first side frame 22, is connected with a ball in a rolling manner, and the ball is in rolling contact with the inclined plane of the first side frame 22.

The working principle of the lithium battery with the PTC external module based on the first embodiment is as follows: when the lithium battery is assembled, the battery module 2 is assembled first. When the battery module 2 is assembled, a plurality of single batteries are distributed in a matrix form inside the vertically symmetrical sleeve module 21, and after the assembly is completed, the side frame I22 and the side frame II 23 in the module are symmetrically connected to the side edge of the battery module 2. When the side frame one 22 and the side frame two 23 are fixed to each other, the end of the side frame one 22 is inserted into the locking assembly 24 provided at the end of the side frame two 23, and is locked and fixed. After the fixing is completed, the pins of the side frame I22 and the side frame II 23 are respectively and fixedly connected to the side walls of the sleeve templates 21 which are arranged symmetrically up and down through screws, so that the battery module 2 is assembled. After the battery module 2 is assembled, it is mounted in the case member 11 of the housing 1, and then the fixation between the battery module 2 and the case member 11 is accomplished from the side wall by bolts. The bottom end plate 12 and the top end cover 15 are fixedly connected to both ends of the case member 11, respectively, and the TPC thermistor body 17 is assembled to the loading assembly 16 to form a complete battery body.

When the battery module 2 is assembled, disassembled and maintained, the screws between the die frame and the sleeve die plate 21 are removed, and then the movable rods 246 on the clamping assemblies 24 at the two sides are pressed simultaneously, so that the second springs are stretched, and the second wedges 245 are driven to move. The movement of the second wedge 245 presses the first wedge 244, so that the moving plate 242 connected to the first wedge 244 moves, and the first spring 243 and the stop lever are stretched. The movement of the limiting rod cancels the connection between the side frame I22 and the side frame II 23, thereby facilitating the disassembly of the mold frame. After the die frame is removed, the sleeve die plate 21 is removed, so that a plurality of single batteries on the sleeve die plate are convenient to detach and maintain.

Example two

As shown in fig. 1 and 4, based on the first embodiment, the present embodiment further includes: the side that the symmetry movable plate 242 kept away from each other all is provided with spring one 243, the one end fixed connection that the movable plate 242 was kept away from to spring one 243 is on the inner wall of cavity, the one end that the movable rod 246 kept away from voussoir two 245 passes the lateral wall of cavity to be provided with the handle, and the cover is equipped with the spring two that is used for reset adjustment on the movable rod 246, shell part 11 includes casing 111, all be provided with deflector group 112 on the outer wall around the casing 111, and the inside fixedly connected with of casing 111 is used for bearing battery module 2's framework 113, the converter main part 14 that is located the inside of casing 111 is installed on the right side of framework 113, be provided with rectifier part 13 on the inner wall of bottom board 12, through electric connection between rectifier part 13 and the converter main part 14.

In this embodiment, when the battery module 2 is assembled, the lead connection end thereof is assembled on the converter body 14, and the rectifying component 13 is electrically connected with the converter body 14, so that the battery module 2 is connected with the discharge end on the bottom end plate 12.

In this embodiment, the guide plate group 112 is provided to facilitate loading of the battery body on the vehicle body.

Example III

As shown in fig. 3, based on the first or second embodiment, the present embodiment further includes: the loading assembly 16 comprises a loading plate 161 fixedly connected to the outer wall of the back surface of the shell 111, a movable cavity is formed in the loading plate 161, a worm 162 is connected to the movable cavity in a rotating mode, a worm wheel 163 is arranged on the side edge of the worm 162, a bidirectional screw rod 164 is installed on the worm wheel 163, inner thread rings located on the bidirectional screw rod 164 are sleeved on the two sides of the worm wheel 163 respectively, stay bars 165 are movably connected to the outer ring of each inner thread ring, fixing seats are installed at one ends, far away from the inner thread rings, of the stay bars 165 through locating pins, clamping plates 166 used for fixing in an extrusion mode are connected to one sides, far away from the stay bars 165, of the fixing seats, of the worm 162 penetrate through the back shell wall of the movable cavity, and handles are installed.

In this embodiment, the TPC thermistor body 17 is assembled by first assembling its connection end to the converter body 14, inserting the lead wire into the interior of the case 111, and then placing it in the placement groove of the loading assembly 16. After the placement, the worm wheel 163 is rotated by rotating the worm 162, and the bidirectional screw 164 is driven to rotate. With the rotation of the bidirectional screw rod 164, the plurality of supporting rods 165 thereon are reversely moved, so that the position adjustment of the clamping plate 166 is realized. The adjustment of the clamping plate 166 further clamps and fixes the TPC thermistor body 17 placed in the placement groove, achieving convenient assembly thereof.

In this embodiment, the front surface of the bidirectional screw rod 164 is provided with a plurality of sliding grooves on the front inner wall of the movable cavity, the sliding grooves are slidably connected with a plurality of sliding blocks, and the other sides of the sliding blocks are respectively and fixedly connected with the corresponding inner ring and the outer ring, so as to realize the guiding function on the movement of the sliding blocks.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims

1. The utility model provides an external module lithium cell of PTC, includes the battery body that constitutes by shell (1) and battery module (2), its characterized in that: the shell (1) comprises a shell component (11), two ends of the shell component (11) are respectively connected with a bottom end plate (12) and a top end cover (15) through screws, a loading component (16) is fixedly connected to the outer wall of the back of the shell component (11), and a TPC thermistor main body (17) for protecting a battery main body is loaded on the loading component (16);

the battery module (2) comprises sleeve templates (21) which are arranged up and down symmetrically, a plurality of single batteries are distributed among the sleeve templates (21) in a matrix mode, a die frame for assisting in fixing is further arranged among the sleeve templates (21), and the die frame is assembled through a clamping assembly (24);

the die frame comprises a side frame I (22) and a side frame II (23), the clamping assembly (24) comprises a connector (241) welded at the end part of the side frame II (23), a cavity is formed in the connector (241), a movable plate (242) is symmetrically arranged in the cavity up and down, a limit rod and a wedge block I (244) are arranged on one side, close to each other, of the movable plate (242), a wedge block II (245) is arranged between the wedge blocks I (244), and a movable rod (246) used for adjusting is fixedly connected to the side wall of the wedge block II (245).

2. The PTC external module lithium battery of claim 1, wherein: and the sides, away from each other, of the movable plates (242) are symmetrically provided with first springs (243), and one ends, away from the movable plates (242), of the first springs (243) are fixedly connected to the inner wall of the cavity.

3. The PTC external module lithium battery of claim 1, wherein: one end of the movable rod (246), which is far away from the second wedge block (245), penetrates through the side wall of the cavity, a handle is arranged on the movable rod, and the second spring for resetting and adjusting is sleeved on the movable rod (246).

4. The PTC external module lithium battery of claim 1, wherein: the shell part (11) comprises a shell (111), guide plate groups (112) are arranged on the front outer wall and the rear outer wall of the shell (111), a frame (113) used for supporting the battery module (2) is fixedly connected inside the shell (111), and a converter main body (14) located inside the shell (111) is arranged on the right side of the frame (113).

5. The PTC external module lithium battery of claim 4, wherein: the inner wall of the bottom end plate (12) is provided with a rectifying part (13), and the rectifying part (13) is electrically connected with the converter main body (14).

6. The PTC external module lithium battery of claim 4, wherein: the loading assembly (16) comprises a loading plate (161) fixedly connected to the outer wall of the back of the shell (111), a movable cavity is formed in the loading plate (161), a worm (162) is rotatably connected to the inside of the movable cavity, a worm wheel (163) is arranged on the side edge of the worm (162), and a bidirectional screw rod (164) is arranged on the worm wheel (163).

7. The PTC external module lithium battery of claim 6, wherein: the two sides of the worm wheel (163) are respectively sleeved with an inner thread ring positioned on the two-way screw rod (164), and the outer ring of the inner thread ring is movably connected with a stay bar (165).

8. The PTC external module lithium battery of claim 7, wherein: one ends of the stay bars (165) far away from the inner thread ring are provided with fixing seats through locating pins, and one sides of the fixing seats far away from the stay bars (165) are connected with clamping plates (166) for extrusion fixing.

9. The PTC external module lithium battery of claim 6, wherein: one end of the back of the worm (162) passes through the back shell wall of the movable cavity and is provided with a handle.