Lithium battery module busbar connecting structure

Abstract

The utility model discloses a lithium battery module busbar connection structure which comprises a lithium battery module, a battery protection part is arranged on the lithium battery module, a busbar is detachably arranged on the battery protection part, a plurality of connection pieces are detachably arranged on the busbar, and the plurality of connection pieces are respectively connected with a plurality of pole columns of the lithium battery module through butt joint pieces. According to the busbar connecting structure of the lithium battery module, reliable electrical connection between the connecting sheet and the pole is realized, vibration and impact are effectively resisted, the risk of contact resistance increase is reduced, stable electrical performance of the lithium battery module is ensured, the busbar is ensured to work in a proper temperature range, and good conductivity and stability are maintained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery technical field, concretely relates to lithium battery module busbar connecting structure. BACKGROUND

[0002] In lithium battery module, busbar is used for connecting each cell, realizes the electrical connection between cell, to satisfy different voltage, current output demand.

[0003] Traditional lithium battery module busbar connecting structure has many problems to be solved urgently.In the connection stability aspect, the connection mode is too simple, is difficult to bear the vibration and impact under complex working condition.Part of the connection structure only relies on simple plug or spot welding connection, under the long-term vibration, the connecting point is easy to loosen, leads to the increase of contact resistance, further causes the heating, energy loss increases, even can cause the open circuit fault, seriously influence the performance and safety of lithium battery module.In addition, along with the continuous improvement of lithium battery module power density, the heat generated in the working process of busbar is increasing, however traditional busbar connecting structure often lacks effective heat dissipation design, the heat generated by busbar is difficult to dissipate quickly, leads to temperature rise, does not reduce the conductivity of busbar, also accelerates the aging of battery, shortens the service life of lithium battery module. SUMMARY

[0004] The utility model aims at providing lithium battery module busbar connecting structure to solve the technical defects of poor connection stability and poor heat dissipation effect in the process of use of existing lithium battery module busbar connecting structure.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: lithium battery module busbar connecting structure, including lithium battery module, the battery protection component is installed on the lithium battery module, the busbar is detachably installed on the battery protection component, a plurality of connecting pieces are detachably installed on the busbar, and the plurality of connecting pieces are connected with the plurality of pole columns of the lithium battery module through the butt joint piece respectively.

[0006] As the further scheme of the utility model, the lithium battery module includes the installation box and the plurality of lithium batteries fixedly installed in the installation box;The battery protection component includes the battery cover plate, a plurality of perforations are formed in the battery cover plate, the pole columns on the plurality of lithium batteries respectively pass through the plurality of perforations, and the battery cover plate is connected and fixed with the installation box through the first bolt.

[0007] As the further scheme of the utility model, the two ends of the busbar are integrally formed with the foot pad, the foot pad is fixedly connected with the battery cover plate through the fourth bolt, and the heat dissipation cavity is formed between the bottom of the busbar and the top of the battery cover plate.

[0008] As a further scheme of the utility model, the connecting piece includes a connecting column integrally formed at the bottom of one end of the connecting piece, a mounting hole is formed on the connecting column, the mounting hole penetrates the connecting piece, a connecting groove is formed on the pole, and the connecting column is embedded and inserted into the connecting groove.

[0009] The utility model also includes a second bolt, one end of the second bolt is inserted into the mounting hole communicated with the connecting piece on the connecting piece, and the second bolt is screwed with the pole in the connecting groove.

[0010] As a preferred scheme of the utility model, one end of the connecting piece is fixedly connected with the busbar through a third bolt.

[0011] As a further scheme of the utility model, the battery cover plate is made of silicon carbide fiber ceramic insulation material.

[0012] Compared with the prior art, the lithium battery module busbar connecting structure provided by the utility model has the following beneficial effects:

[0013] 1. The utility model discloses the pole of lithium battery is worn out from the perforation of battery cover plate, one end of the connecting piece is fixed on the busbar through a third bolt, and the other end of the connecting piece is embedded and inserted into the connecting groove of the pole, then the second bolt is screwed with the pole in the connecting groove through the mounting hole on the connecting piece, thereby realizing reliable electrical connection between the connecting piece and the pole.

[0014] 2. The heat dissipation cavity formed between the bottom of the busbar and the top of the battery cover plate can increase the heat dissipation area, the heat generated by the busbar is dissipated to the surrounding environment by using natural convection of air, and the air flows in the heat dissipation cavity and continuously carries away heat, thereby reducing the temperature of the busbar and ensuring that the busbar works in a suitable temperature range and maintains good electrical conductivity and stability.

[0015] 3. The battery cover plate is made of silicon carbide fiber ceramic insulation material, which isolates the circuit inside the lithium battery module from the external environment and other components, prevents current leakage to the outside, avoids safety accidents such as short circuit and electric leakage, and ensures that the entire lithium battery module works in a safe electrical environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only one case of the embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0017] Figure 1 It is a structure schematic view of the embodiment of the utility model;

[0018] Figure 2 It is a structure schematic view of the embodiment of the utility model;

[0019] Figure 3 It is a structure schematic view of the embodiment of the utility model;

[0020] Figure 4 It is a structure schematic view of the embodiment of the utility model.

[0021] Reference signs:

[0022] 1, lithium battery module;101, installation box;102, lithium battery;103, pole;1031, connecting groove;2, battery cover plate;201, perforation;202, first bolt;3, busbar;4, connecting sheet;401, connecting column;402, mounting hole;403, second bolt;404, third bolt;5, foot pad;501, fourth bolt. Specific implementation

[0023] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear and obvious, the following is further detailed in the embodiment of the utility model, and it should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0024] In the description of the embodiment of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawing, and are only used to facilitate the description of the embodiment of the utility model and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiment of the utility model.

[0025] In the description of the embodiment of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, integrally connected, or detachably connected;It can be the communication inside two elements;It can be directly connected, or indirectly connected through an intermediate medium, and those skilled in the art can understand the specific meaning of the above terms in the embodiment of the utility model according to the specific circumstances.

[0026] Reference signs: Figures 1-4As shown, the utility model embodiment lithium battery module busbar connecting structure, including lithium battery module 1, the battery protection component is installed on lithium battery module 1, the battery protection component is detachably installed with busbar 3, busbar 3 is detachably installed with multiple connecting pieces 4, multiple connecting pieces 4 are connected with the multiple pole 103 of lithium battery module 1 respectively through the butt joint.

[0027] The above technical scheme realizes reliable electrical connection of the connecting piece 4 and the pole 103, effectively resists vibration and impact, reduces the risk of increased contact resistance, ensures stable electrical performance of the lithium battery module 1, ensures that the busbar 3 works within a suitable temperature range, and maintains good electrical conductivity and stability.

[0028] Referring to Figure 3 As shown, the lithium battery module 1 includes a mounting box 101 and a plurality of lithium batteries 102 fixedly installed inside the mounting box 101; the battery protection component includes a battery cover plate 2, a plurality of through holes 201 are formed in the battery cover plate 2, the poles 103 on the plurality of lithium batteries 102 respectively pass through the plurality of through holes 201, and the battery cover plate 2 is connected and fixed with the mounting box 101 through the first bolt 202.

[0029] The above scheme forms a plurality of through holes 201 on the battery cover plate 2, precisely fits the poles 103 of the plurality of lithium batteries, ensures the sealing of the battery module, enables the poles 103 to be smoothly connected with external components such as the busbar 3, improves the adaptability and universality of the entire structure, installs the battery cover plate 2 through the first bolt 202, effectively fixes the battery cover plate 2, provides a stable basis for the installation of components such as the busbar 3, and facilitates the disassembly, repair and maintenance of the battery cover plate 2.

[0030] The two ends of the busbar 3 are integrally formed with a foot 5, the foot 5 is fixedly connected with the battery cover plate 2 through the fourth bolt 501, and a heat dissipation cavity is formed between the bottom of the busbar 3 and the top of the battery cover plate 2.

[0031] The above scheme forms a heat dissipation cavity between the bottom of the busbar 3 and the top of the battery cover plate 2, increases the heat dissipation area, is conducive to air convection, timely dissipates the heat generated by the busbar 3 during operation, avoids performance degradation due to overheating, and prolongs the service life of the busbar 3 and the lithium battery module 1.

[0032] Referring to Figure 4As shown, the connecting piece includes a connecting column 401 integrally formed at the bottom of one end of the connecting piece 4, the connecting column 401 is provided with a mounting hole 402, the mounting hole 402 penetrates the connecting piece 4, the pole column 103 is provided with a connecting groove 1031, and the connecting column 401 is embedded and inserted into the inside of the connecting groove 1031. The utility model embodiment further includes a second bolt 403, one end of the second bolt 403 is inserted from the mounting hole 402 communicated with the connecting piece 4 and extends into the inside of the connecting groove 1031 and is threadedly connected with the pole column 103.

[0033] The above scheme is that the connecting piece 4 is embedded and inserted into the connecting groove 1031 of the pole column 103 through the connecting column 401, and then the second bolt 403 is threadedly connected, so that the connecting piece 4 and the pole column 103 are connected tightly and stably through a double connecting mode, vibration and impact are effectively resisted, the risk of increasing contact resistance is reduced, and the electrical performance stability of the lithium battery module 1 is ensured.

[0034] One end of the connecting piece 4 is fixedly connected with the busbar 3 through the third bolt 404. The pad feet 5 at two ends of the busbar 3 are fixed with the battery cover plate 2 through the fourth bolt 501, and the connection between the components is firm, so that the stability of the entire busbar connecting structure is ensured.

[0035] The battery cover plate 2 is made of silicon carbide fiber ceramic insulation material and has good insulation performance, so that current leakage is effectively prevented, short circuit and other faults in the lithium battery module 1 are avoided, and safe operation of the lithium battery module is ensured. Meanwhile, the silicon carbide fiber ceramic also has good heat conductivity and is helpful to auxiliary heat dissipation.

[0036] During installation, the pole column 103 of the lithium battery 102 is inserted through the perforation 201 of the battery cover plate 2, one end of the connecting piece 4 is fixed on the busbar 3 through the third bolt 404, the other end of the connecting piece 4 is embedded and inserted into the connecting groove 1031 of the pole column 103, the second bolt 403 is used to pass through the mounting hole 402 on the connecting piece 4 and extend into the connecting groove 1031 and be threadedly connected with the pole column 103, so that reliable electrical connection between the connecting piece 4 and the pole column 103 is realized, and current can be conducted from the pole column 103 of the lithium battery 102 to the connecting piece 4.

[0037] During use, the busbar 3 generates heat due to current passing through during operation, and the heat dissipation cavity formed between the bottom of the busbar 3 and the top of the battery cover plate 2 can increase the heat dissipation area, and the heat generated by the busbar 3 is dissipated to the surrounding environment by using natural convection of air, the air flows in the heat dissipation cavity and continuously carries away heat, thereby reducing the temperature of the busbar 3, ensuring that it works in a suitable temperature range, maintains good electrical conductivity and stability, in addition, the battery cover plate 2 is made of silicon carbide fiber ceramic insulation material, which can isolate the internal circuit of the lithium battery module 1 from the external environment and other components, prevent current leakage to the outside, avoid safety accidents such as short circuit and electric leakage, and ensure that the entire lithium battery module 1 works in a safe electrical environment.

[0038] The above shows and describes the basic principles of the present application, the above is only the preferred embodiment of the present application, and is not used to limit the present application, the above embodiment and the description in the specification only illustrate the principles of the present application, any modification, equivalent replacement and improvement within the scope of the present application, etc. should be included in the protection scope of the present application.

Claims

1. A lithium battery module busbar connection structure, characterized by: The application relates to a lithium battery module (1) which is provided with a battery protection component, a busbar (3) is detachably installed on the battery protection component, and a plurality of connecting pieces (4) are detachably installed on the busbar (3) and connected with a plurality of pole columns (103) of the lithium battery module (1) through butt joints.

2. The lithium battery module busbar connection structure according to claim 1, characterized in that: The lithium battery module (1) comprises a mounting box (101) and a plurality of lithium batteries (102) fixedly installed in the mounting box (101). The battery protection component comprises a battery cover plate (2) which is provided with a plurality of through holes (201), the pole columns (103) of the plurality of lithium batteries (102) respectively pass through the through holes (201), and the battery cover plate (2) is connected and fixed with the mounting box (101) through first bolts (202).

3. The lithium battery module busbar connection structure according to claim 2, characterized in that: The busbar (3) is integrally formed with a pad foot (5) at both ends, the pad foot (5) is fixedly connected with the battery cover plate (2) through fourth bolts (501), and a heat dissipation cavity is formed between the bottom of the busbar (3) and the top of the battery cover plate (2).

4. The lithium battery module busbar connection structure according to claim 3, characterized in that: The butt joint comprises a connecting column (401) integrally formed at one end of the bottom of the connecting piece (4), the connecting column (401) is provided with a mounting hole (402), the mounting hole (402) penetrates the connecting piece (4), the pole column (103) is provided with a connecting groove (1031), and the connecting column (401) is embedded and inserted into the connecting groove (1031). The application further comprises second bolts (403), one end of the second bolts (403) is inserted into the mounting hole (402) communicated with the connecting piece (4) and extends into the connecting groove (1031) and is threadedly connected with the pole column (103).

5. The lithium battery module busbar connection structure according to any one of claims 1-4, characterized in that: One end of the connecting piece (4) is fixedly connected with the busbar (3) through third bolts (404).

6. The lithium battery module busbar connection structure of claim 2, wherein: The battery cover plate (2) is made of silicon carbide fiber ceramic insulation material.

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