24V compact LN2 low-voltage battery structure
By using plastic end plates and installing electrical parts such as BMS in low-voltage small lithium-ion batteries, the problems of high costs and complex upper cover structure are solved, and the effect of reducing costs and simplifying the structure is achieved.
Patent Information
- Application Number
- CN202421863913.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The low-voltage small batteries of existing lithium-ion batteries have problems such as high cost and complex upper cover structure.
Plastic end plates are used instead of metal end plates, electrical parts such as BMS are installed on the plastic end plates, and the upper cover and the lithium battery module are fixed through snaps and tie-up straps.
Reduces battery costs, simplifies the upper cover structure, and improves the overall performance and reliability of the battery.
Smart Images
Figure CN222940102U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lithium ion batteries, and in particular relates to a 24V compact LN2 low-voltage battery structure. Background Art
[0002] Existing traditional lithium-ion batteries use soft-pack or square-shell cells, which are matched with pocket plates or metal end plates to form modules. The module is fixed to the upper cover by bolts, and the upper cover is also fixed with BMS, relays and shunts by bolts. The module is fixed by glue at the bottom of the lower box of the battery.
[0003] For low-voltage small batteries, firstly, there are the shortcomings of high cost due to the glue injection at the bottom of the battery box and the use of metal end plates or pocket plates; secondly, electrical components such as BMS are installed on the upper cover, which has the disadvantage of complex structure of the upper cover. Utility Model Content
[0004] The purpose of the utility model is to provide a 24V compact LN2 low-voltage battery structure in order to overcome the above-mentioned shortcomings. Plastic end plates are used instead of metal end plates, and electrical components such as BMS are installed on the plastic end plates to solve the problems of high cost and complex upper cover structure of low-voltage small batteries.
[0005] The technical solution of the utility model is: a 24V compact LN2 low-voltage battery structure, including a lower box, a lithium battery module, an upper cover and an output copper busbar, characterized in that: the output copper busbar adopts an output soft copper wire; the upper cover and the lithium battery module are hoisted and fixed by buckles and binding belts; the upper cover is provided with positive and negative output soft copper busbar mounting positions, two sealing small cover mounting holes and two sealing small covers; the lithium battery module adopts a plastic end plate, and the electrical components are mounted on the plastic end plate.
[0006] The bottom of the lithium battery module described in the technical solution of the utility model is fixed to the lower box body by structural adhesive.
[0007] The lithium battery module described in the technical solution of the utility model comprises a row of 8S lithium battery cells, a positive terminal plate, a negative terminal plate, a CCS, a steel tie, foam, a PC module protection cover, a relay, a shunt and a BMS; wherein the CCS comprises an FPC, a wiring harness isolation plate, and a collection NI sheet; the wiring harness isolation plate is provided with a snap-in position that matches the upper cover hoisting.
[0008] The wiring harness isolation plate described in the technical solution of the utility model is provided with two injection-molded nuts which have the function of output pole base; the buckle position of the wiring harness isolation plate is the buckle position of the module upper cover.
[0009] The upper cover and the PC module protection cover described in the technical solution of the utility model are provided with buckles that are engaged with each other on the two long sides, and steel tie bands are provided on the two short sides.
[0010] In the technical solution of the present utility model, the BMS is installed on the positive end plate, and the CCS, relay and shunt are installed on the negative end plate.
[0011] In the technical solution of the present utility model, the lower box body is provided with module installation limiting ribs; the upper cover is provided with positioning posts for positioning the lithium battery module.
[0012] In the technical solution of the present utility model, the lower box body is provided with reinforcing ribs for increasing strength; the upper cover is provided with 2 positioning posts.
[0013] In the technical solution of the present utility model, the upper cover (10) and the lower box body are made of PP material; the plastic end plate is made of PA6+GF30 material; the output flexible copper wire includes a positive output flexible copper wire and a negative output flexible copper wire, passes through the installation hole of the second seal small cover and is fixedly connected with the upper cover and the lithium battery module by bolts.
[0014] In the technical solution of the present utility model, the positive end plate and the negative end plate are provided with steel strap limiting buckles for preventing the steel strap from falling off.
[0015] The beneficial effects of the present utility model are as follows: Since the plastic end plate is used to replace the metal end plate, the cost can be reduced and the efficiency can be increased, and the deficiency of high cost can be solved; Since the electrical components such as the BMS are installed on the plastic end plate, the deficiency that the upper cover structure is complicated due to the installation of the electrical components such as the BMS on the upper cover is solved; For low-voltage batteries, the weight is lighter, and the tie strap + buckle with lower cost can be used for auxiliary fixation.
[0016] The present utility model has the characteristics of simple upper cover structure of the low-voltage battery and reduced battery cost, and is mainly used for low-voltage lithium-ion small batteries. Description of the Drawings
[0017] Figure 1 It is a schematic structural diagram of the present utility model.
[0018] Figure 2 It is a side view of the present utility model with the lower box body removed.
[0019] Figure 3 It is Figure 2 The enlarged view of A in
[0020] Figure 4 It is a front view of the present utility model with the lower box body removed.
[0021] Figure 5 It is Figure 4 The enlarged view of B in
[0022] Figure 6 It is a schematic structural diagram of the negative end plate of the present utility model.
[0023] Figure 7 This is a schematic structural diagram of the positive end plate of the present utility model.
[0024] Figure 8 This is a three-dimensional view of the present utility model with the upper cover and the lower box removed.
[0025] Figure 9 This is a schematic structural diagram of the upper cover of the present utility model.
[0026] Reference numerals: 1 - handle; 2 - silicone sealing cover; 3 - output flexible copper wire; 3-1 - positive output flexible copper wire; 3-2 - negative output flexible copper wire; 4 - steel tie strap; 5 - foam; 6 - positive end plate; 7 - BMS; 8 - lower box body; 9 - second sealing small cover; 10 - upper cover; 11 - waterproof breathable valve; 12 - module upper cover; 13 - CCS; 14 - relay; 15 - shunt; 16 - negative end plate; 17 - module upper cover buckle position. Specific embodiments
[0027] The present utility model will be further described below in conjunction with embodiments.
[0028] As Figures 1 to 9 shown, an embodiment of a 24V compact LN2 low-voltage battery structure of the present utility model is composed of a lower box body 8, a lithium battery module, an upper cover 10 and an output copper row.
[0029] Among them, the lithium battery module includes a row of 8S lithium battery cells, a positive end plate 6, a negative end plate 16, a CCS 13, a steel tie strap 4, a foam 5, a PC module protection cover, a relay 14, a shunt 15 and a BMS 7. The positive end plate 6 and the negative end plate 16 are both plastic end plates, made of PA6+GF30 material. Given the relatively small battery capacity, the strength meets the performance requirements. The CCS 13 includes an FPC, a wire harness isolation board, and a NI collecting sheet. There are two injection nuts on the wire harness isolation board, which also serve as the output pole base function. There are buckle positions on the wire harness isolation board that match the hoisting of the upper cover 10, facilitating the subsequent hoisting of the upper cover 10 and the lithium battery module. The wire harness isolation board is provided with PC module upper cover installation buckle positions. During use, the CCS comes in one piece for easy installation and welding. The buckle position of the wire harness isolation board is the module upper cover buckle position 17. The positive end plate 6 is provided with a BMS installation position, and the BMS installation position is provided with relay, shunt, and CCS installation positions, facilitating the installation of the BMS 7 on the positive end plate 6, and the installation of the CCS 13, relay 14, and shunt 15 on the negative end plate 16 to achieve multi-functionality. The positive end plate 6 and the negative end plate 16 are provided with steel tie strap limiting buckles to prevent the steel tie strap from falling off. When the battery pack is formed, the lithium battery module and the upper cover 10 are fixed and hoisted through tie straps and buckles. After the system test is completed, it is then placed in the lower box body 8, and structural adhesive is placed in the lower box body 8 in advance to meet the overall strength performance requirements of the battery pack.
[0030] The output copper bar uses output soft copper wires 3, including a positive output soft copper wire 3-1 and a negative output soft copper wire 3-2.
[0031] The upper cover 10 is provided with positive and negative output soft copper bar mounting positions, second seal small cover mounting holes, and a second seal small cover 9. The upper cover 10 and the lithium battery module are fixed by buckles and binding straps for hoisting. The upper cover 10 is provided with positions for buckles and binding straps used for hoisting and fixing with the lithium ion module. On the two long sides of the upper cover 10 and the PC module protection cover, there are buckles that are buckled with each other, and steel binding straps 4 are provided on the two short sides. The upper cover 10 is provided with positive and negative output soft copper bar mounting positions. The upper cover is provided with 2 positioning posts to achieve precise positioning with the module. The upper cover 10 is made of PP material, which is convenient for cost reduction. During assembly, the upper cover 10, the positive output soft copper wire 3-1, and the negative output soft copper wire 3-2 are first fixed by bolts, and then fixed with the lithium ion module through the small cover mounting holes to achieve power-on.
[0032] The lower box body 8 is provided with module installation limiting ribs, which helps in the positioning and fixing of the lithium battery module. The bottom of the lithium battery module is fixed to the lower box body 8 by structural adhesive, reducing the cost. The lower box body 8 is provided with reinforcing ribs for increasing strength. The lower box body 8 is made of PP material, which is convenient for cost reduction.
Claims
1. A 24V compact LN2 low-voltage battery structure, comprising a lower box (8), a lithium battery module, an upper cover (10) and an output copper bus, characterized in that: The output copper busbar adopts an output soft copper wire (3); the upper cover (10) and the lithium battery module are fixed by hanging with buckles and binding belts; the upper cover (10) is provided with positive and negative output soft copper busbar mounting positions, two sealing small cover mounting holes and two sealing small covers (9); the lithium battery module adopts a plastic end plate, and the electrical components are mounted on the plastic end plate.
2. A 24V compact LN2 low-voltage battery structure according to claim 1, characterized in that: The bottom of the lithium battery module is fixed to the lower box (8) by means of structural adhesive.
3. A 24V compact LN2 low-voltage battery structure according to claim 1 or 2, characterized in that: The lithium battery module comprises a row of 8S lithium battery cells, a positive terminal plate (6), a negative terminal plate (16), a CCS (13), a steel tie (4), foam (5), a PC module protection cover, a relay (14), a shunt (15) and a BMS (7); wherein the CCS (13) comprises an FPC, a wiring harness isolation plate and a collection NI sheet; and a buckle position matching the upper cover (10) for hoisting is provided on the wiring harness isolation plate.
4. A 24V compact LN2 low-voltage battery structure according to claim 3, characterized in that: The wiring harness isolation plate has two injection-molded nuts that also function as output pole bases; the buckle position of the wiring harness isolation plate is the module upper cover buckle position (17).
5. A 24V compact LN2 low-voltage battery structure according to claim 4, characterized in that: The upper cover (10) and the PC module protection cover are provided with buckles that engage with each other on the two long sides, and steel tie bands (4) are provided on the two short sides.
6. A 24V compact LN2 low-voltage battery structure according to claim 3, characterized in that: The BMS (7) is mounted on the positive terminal plate (6), and the CCS (13), the relay (14) and the shunt (15) are mounted on the negative terminal plate (16).
7. A 24V compact LN2 low-voltage battery structure according to any one of claims 1-2 and 4-6, characterized in that: The lower box body (8) is provided with module installation limiting ribs; and the upper cover (10) is provided with positioning columns for positioning with the lithium battery module.
8. A 24V compact LN2 low-voltage battery structure according to claim 7, characterized in that: The lower box body (8) is provided with reinforcing ribs for increasing strength; and the upper cover (10) is provided with two positioning columns.
9. A 24V compact LN2 low-voltage battery structure according to any one of claims 1-2, 4-6, and 8, characterized in that: The upper cover (10) and the lower box body (8) are made of PP material; the plastic end plate is made of PA6+GF30 material; the output soft copper wire (3) comprises a positive output soft copper wire (3-1) and a negative output soft copper wire (3-2), which pass through the mounting holes of the two sealing small covers and are fixedly connected to the upper cover (10) and the lithium battery module by bolts.
10. A 24V compact LN2 low-voltage battery structure according to claim 5, characterized in that: The positive terminal plate (6) and the negative terminal plate (16) are provided with steel tie limit buckles for preventing the steel tie (4) from falling off.