Battery system series connection base and lithium ion battery pack

Abstract

The utility model discloses a battery system series base and a lithium ion battery pack, the battery system series base comprises: a base provided with an insert mounting hole for mounting a series row; and the base upper cover is connected with the base, and the base upper cover and the base form an accommodating space for accommodating the series row. According to the utility model, the structure and the connection mode of the series connection base of the battery system are optimized, the connection adaptability of the series connection row is improved, and the problem of material consumption caused by the material supply problem of the module box or the abnormal insert in the assembling process of the battery system and the misoperation in the transferring process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery manufacturing, and specifically relates to a battery system series connection base and a lithium ion battery pack. Background Art

[0002] In recent years, with the continuous development and progress of the electric vehicle industry, the requirements for battery packs have also been increasing. During the battery pack assembly process, various fastener bolts of the battery system will be torqued, especially the tightening of series bolts is of top priority.

[0003] At present, the basic series connection method is to add inserts to the plastic parts of the module itself and assemble and lock them with various electrical parts inside the battery system through bolts. Due to problems with the incoming materials of the module box or abnormal inserts, as well as improper transportation process or operation, qualified modules after welding are scrapped due to abnormal inserts and incoming materials, wasting manpower, material resources and time. At the same time, the battery cells inside the entire module have been welded and cannot be welded and packaged again, causing great waste and failing to achieve the purpose of cost control. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a battery system series base and a lithium-ion battery pack, which optimizes the structure and connection method of the battery system series base, improves the adaptability of the series row connection, and solves the material consumption problem caused by module box incoming material problems or insert abnormalities and improper operation during transportation during the battery system assembly process.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, a battery system series base is provided, comprising: a base, the base being provided with an insert mounting hole for mounting a series row; a base upper cover, the base upper cover being connected to the base and forming a receiving space with the base for receiving the series row.

[0007] Furthermore, the base upper cover is in a "C"-shaped structure, and has an upper cover supporting surface and an upper cover locking surface that are arranged in a high and low offset manner. The upper cover locking surface is located in the middle of the upper cover supporting surface, and has an upper cover locking point one and an upper cover locking point two. The base is provided with a base locking hole that matches the upper cover locking point two, and the upper cover locking point one, the upper cover locking point two and the base locking hole cooperate to form a locking connection between the base and the base upper cover.

[0008] Furthermore, the base engaging hole is hollowed out and chamfered inside, and the outside is formed into a height-staggered shape matching the upper cover supporting surface and the upper cover engaging surface with a height-staggered arrangement, so as to facilitate the engagement between the base and the base upper cover.

[0009] Furthermore, the insert mounting hole is located in the middle of the base, and a hollow design is adopted between the insert mounting hole and the base to form a plurality of reinforcing ribs.

[0010] Furthermore, inserts for connecting the series rows by bolts are arranged in the insert mounting holes.

[0011] Furthermore, the base support surface of the base is provided with an assembly support column and a support column buckle for installing the base.

[0012] Furthermore, the assembly support column is in a "U"-shaped structure, and the bottoms of the two branches are hollowed out to form assembly support column holes for plugging with corresponding structures inside the device to be assembled.

[0013] Furthermore, the support column buckle is located in the support column "U"-shaped groove of the assembly support column, and the end of the support column buckle is an arc surface and is higher than the connection surface with the assembly support column at the rear, and the arc surface is sectioned to form a thin-walled structure, which is used to form a reverse buckle and fasten with the fixing hole in the device to be assembled.

[0014] In a second aspect, a lithium-ion battery pack is provided, wherein the lithium-ion battery pack is equipped with the battery system series connection base described in the first aspect.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model optimizes the structure and connection method of the series base of the battery system, improves the adaptability of the series row connection, and solves the problem of material consumption caused by module box incoming materials, insert abnormalities, and improper operation during transportation during the assembly of the battery system by setting an insert mounting hole on the base; the base cover is connected to the base and forms a accommodating space for accommodating the series row with the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a battery system series base provided by an embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the upper cover of the base in the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the base in the embodiment of the utility model. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the structure of the base in the embodiment of the utility model. Figure 2 ;

[0020] Figure 5This is a schematic diagram of the installation state of a battery system series base in a lithium-ion battery pack provided by an embodiment of the utility model;

[0021] In the figure: 1. Base cover; 11. Top cover support surface; 12. Top cover snap-in surface; 121. Top cover snap-in point one; 122. Top cover snap-in point two; 2. Base; 21. Insert mounting hole; 22. Base snap-in hole; 23. Reinforcing rib; 24. Base support surface; 25. Assembly support column; 251. Assembly support column hole; 252. Support column "U"-shaped groove; 26. Support column buckle; 3. Series row. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0023] Embodiment 1:

[0024] like Figure 1 to Figure 4 As shown, a battery system series base includes: a base cover 1, a cover support surface 11, a cover clamping surface 12, a cover clamping point 121, a cover clamping point 2 122, a base 2, an insert mounting hole 21, a base clamping hole 22, a reinforcing rib 23, a base support surface 24, an assembly support column 25, an assembly support column hole 251, a support column "U"-shaped groove 252 and a support column buckle 26.

[0025] There are upper cover support surfaces 11 on both sides of the base upper cover 1, and the upper cover support surfaces 11 on both sides are staggered in height and form an inverted "U" structure (such as Figure 2 As shown), the upper cover snap-fit ​​surface 12 is located between the two upper cover support surfaces 11, and the upper cover snap-fit ​​point 121 and the upper cover snap-fit ​​point 2 122 are located on the upper cover snap-fit ​​surface 12, forming a snap-fit ​​state with the base 2, which is convenient for the subsequent snap-fit ​​limiting with the base 2.

[0026] The base 2 is provided with an insert mounting hole 21 for mounting the series row; the base upper cover 1 is connected to the base 2 and forms a receiving space for accommodating the series row with the base 2.

[0027] like Figure 1 , Figure 3 , Figure 4As shown, the base 2 is an integral structure, with a base engaging hole 22 on the top, which is staggered in height front to back and engages with the upper cover engaging surface 12 to facilitate the engagement of the upper cover engaging point 1 121 and the upper cover engaging point 2 122. The assembly support column 25 contains two assembly support column holes 251. The assembly support column holes 251 are rectangular in design and hollowed out in the middle, which is convenient for plugging into a fixed position or directly placing on a fixed hole. The two assembly support columns 25 are U-shaped and connected to the base support surface 24. The support column buckle 26 formed on the edge of the U-shaped structure surface is connected to the assembly support column hole 251 structure. The support column buckle 26 is located in the support column "U"-shaped groove 252 of the assembly support column 25. The end of the support column buckle 26 is an arc surface and is higher than the connection surface with the assembly support column 25 at the rear, and the arc surface at the end is sectioned to form a thin wall, which is convenient for forming a reverse buckle and tightening; the middle of the top of the base 2 is an insert mounting hole 21, and a partial area avoiding the position of the insert mounting hole 21 is hollowed out to form a mounting hole reinforcement rib 23 structure to enhance the structural strength.

[0028] like Figure 1 , Figure 2 As shown, the base cover 1 is an integral body and presents a "C"-shaped structure. At the same time, the length of the upper cover support surface 11 on both sides can be adjusted according to the actual situation in conjunction with the base 2 to adapt to different length requirements, and this application does not make specific limitations; the middle of the upper cover support surfaces 11 on both sides contains an upper cover clamping surface 12, and the upper cover clamping surface 12 and the base clamping hole 22 form a complementary position to limit locking and fastening.

[0029] Two groups of base engaging holes 22 are provided on both sides of the base 2. The front and rear height offsets of the base engaging holes 22 form a complementary engagement with the base upper cover 1, which can ensure the stability of the engagement between the two. There are two assembly support columns 25 located under the base 2, which are in a "U"-shaped structure. The shape and length of the assembly support columns 25 can also be adjusted according to actual conditions in conjunction with the fixing holes to adapt to different requirements of shape and length, and this application does not make specific limitations.

[0030] An insert mounting hole 21 is opened in the middle position of the base 2 as a bolt connection hole, and the series bolt can pass through the connection hole. The external shape and length can also be adjusted according to actual conditions and in conjunction with the bolt to adapt to different shape and length requirements. This application does not make specific limitations.

[0031] The surrounding area of ​​the insert mounting hole 21 is hollowed out to form a reinforcing rib 23, which is used to increase the force during bolt assembly and reduce the weight of the base to make it lightweight. The shape and size of the hollowing of this area can be adjusted according to actual conditions to meet different needs, and this application does not make specific limitations.

[0032] The specific operating principles of this application are as follows:

[0033] In the initial state, the base 2 is taken out, and the operator aligns the assembly support column 25 at the bottom of the base 2 with the interface to be fixed. The operator keeps a steady state and moves downward until the arc surface of the head of the support column buckle 26 enters the interface and a click sound is heard, indicating that the support column buckle 26 is installed in place.

[0034] Then connect the series row 3 (such as Figure 5 As shown in the figure, it is placed on the base 2. At this time, the fixing hole of the series row 3 is cocentric with the insert installation hole 21, and bolts are used to lock and torque. After that, the operator moves the upper cover snap-in point 121 and the upper cover snap-in point 122 on the upper cover snap-in surface 12 on both sides of the base upper cover 1 downward into the base snap-in hole 22. When the upper side of the base snap-in hole 22 is between the upper cover snap-in point 121 and the upper cover snap-in point 122 of the upper cover snap-in surface 12, it is in a limited position and is clamped.

[0035] On the contrary, the upper cover engagement point 122 inside the base engagement hole 22 is squeezed inward to escape from the base engagement hole 22, and at the same time, the upper cover engagement surface 12 is contracted inward. At this time, the base upper cover 1 is pulled upward to separate it from the base 2; then the series-row bolts are removed from the insert mounting hole 21. At this time, the support column buckles 26 on both sides of the base 2 are contracted inward to a certain extent and then lifted upward to remove the base 2 from the mounting hole.

[0036] After the assembly is completed, the operator loosens the base cover 1 to complete the operation; then repeats the above steps in sequence to install the battery packs in series one by one.

[0037] The utility model assembles the support column into a fixed position, the support column buckle is engaged with the fixed position to ensure the fixing effect, and then the series row is placed on the base, the series row fixing hole is aligned with the insert installation hole of the base, and bolts are used to lock, so as to realize the series operation of the battery system, and the base cover is engaged on the base to ensure the safety of the electrical parts. The use of the utility model not only ensures the one-time qualified rate of the module, but also has simple installation and operation, low cost, reduces the difficulty of employee operation and the resulting misoperation, and improves work efficiency.

[0038] The utility model connects the assembly support column with the mounting hole reserved at the series position inside the battery pack, and a thin-walled surface formed by a circular cross-section is provided on the support column buckle, which is buckled at the corresponding position of the reserved mounting hole, thereby limiting the base when it moves up and down, and limiting the series base as a whole. The combination of the two can ensure that the base fits tightly with the reserved hole, thereby ensuring the stability of its assembly.

[0039] Embodiment 2:

[0040] Based on the battery system series connection base described in the first embodiment, this embodiment provides a lithium-ion battery pack, and the lithium-ion battery pack is equipped with the battery system series connection base described in the first embodiment.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A battery system series connection base, characterized in that: include: A base (2), the base (2) being provided with an insert mounting hole (21) for mounting the series row; A base upper cover (1), the base upper cover (1) is connected to the base (2) and forms a storage space with the base (2) for storing the series row.

2. The battery system series connection base according to claim 1, characterized in that: The base upper cover (1) is in a "C"-shaped structure and has an upper cover support surface (11) and an upper cover clamping surface (12) that are arranged in a height-staggered manner; the upper cover clamping surface (12) is located in the middle of the upper cover support surface (11) and has an upper cover clamping point 1 (121) and an upper cover clamping point 2 (122); The base (2) is provided with a base engaging hole (22) matching the upper cover engaging point 2 (122); the upper cover engaging point 1 (121), the upper cover engaging point 2 (122) and the base engaging hole (22) cooperate to form an engaging connection between the base (2) and the base upper cover (1).

3. The battery system series connection base according to claim 2, characterized in that: The base engaging hole (22) is hollowed out and chamfered inside, and is formed with a height-staggered shape on the outside that matches the upper cover supporting surface (11) and the upper cover engaging surface (12) that are arranged in a height-staggered manner, so as to facilitate the engaging of the base (2) with the base upper cover (1).

4. The battery system series connection base according to claim 1, characterized in that: The insert mounting hole (21) is located in the middle of the base (2), and a hollow design is adopted between the insert mounting hole (21) and the base (2) to form a plurality of reinforcing ribs (23).

5. The battery system series connection base according to claim 1, characterized in that: The insert mounting hole (21) is provided with an insert for connecting the series rows by bolts.

6. The battery system series connection base according to claim 1, characterized in that: The base support surface (24) of the base (2) is provided with an assembly support column (25) and a support column buckle (26) for mounting the base (2).

7. The battery system series connection base according to claim 6, characterized in that: The assembly support column (25) is in a "U"-shaped structure, and the bottoms of its two branches are hollowed out to form assembly support column holes (251) for plugging with corresponding structures inside the device to be assembled.

8. The battery system series connection base according to claim 7, characterized in that: The support column buckle (26) is located in a support column "U"-shaped groove (252) of the assembly support column (25), and the end of the support column buckle (26) is an arc surface and is higher than the connection surface between the rear part and the assembly support column (25), and the arc surface is sectioned to form a thin-walled structure for forming a reverse buckle with a fixing hole in the device to be assembled and fastened.

9. A lithium-ion battery pack, characterized in that: The lithium-ion battery pack is provided with a battery system series connection base as claimed in any one of claims 1 to 8.

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