A battery pack housing and a battery pack for clamping a battery cell assembly

Abstract

The present invention discloses a battery pack housing for clamping a battery cell assembly, which includes upper and lower cover plates and a cylinder body. The cylinder body includes a first end face and a second end face opposite to the first end face in position. The cylinder body includes a plurality of sets of tensioning components. Each tensioning component includes a tensioning part and a mounting part. The mounting parts are correspondingly arranged on the first end face and the second end face. Both ends of the tensioning part are fixedly installed on the mounting parts. The tensioning components tension the first end face and the second end face so that the cylinder body clamps the battery cell assembly. The present invention solves the problems of weak structural strength of the battery pack, easy thermal expansion and deformation, and poor safety. By arranging the tensioning components on the housing, the cylinder body clamps the battery cell assembly, making the battery pack not easily deformed, enhancing the structural strength of the entire battery pack, and improving the safety and service life of the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack housing and a battery pack for clamping a battery cell assembly. Background Art

[0002] At present, the maximum capacity of square lithium batteries on the market is about 300Ah, while the maximum capacity of cylindrical batteries is no more than 100Ah. Energy storage technology is a technology that will bring revolutionary changes to the development and operation of future energy systems. Among many energy storage technologies, the fastest technological progress is in electrochemical energy storage technology. Compared with other methods, electrochemical energy storage has the advantages of convenient use, less environmental pollution, being not restricted by geography, not being restricted by other cycles in energy conversion, high conversion efficiency, high specific energy and high specific power. The energy storage industry is expected to develop rapidly. However, affected by the battery capacity, when lithium batteries are used for energy storage, multiple battery cell assemblies need to be connected in series and parallel to form a battery pack, resulting in a large number of connecting parts. During operation, the battery cell assemblies will generate a large amount of heat and are prone to deformation and swelling due to heat, which affects the safety and service life of the battery pack.

[0003] CN212726513U discloses a new type of household energy storage cabinet, including a cabinet. A main control slot is opened at the top end inside the cabinet, and a main controller is bolted inside the main control slot. A bracket is welded inside the cabinet, and a sliding buckle frame is inlaid on the surface of the bracket. A battery pack is slidably buckled inside the sliding buckle frame, and a storage battery is buckled inside the battery pack. A base is welded at the bottom end of the cabinet. This application cannot solve the problems of weak structural strength of the battery pack, easy expansion and deformation due to heat, and poor safety.

[0004] CN213520187U discloses a multi-series lithium-ion battery pack with a protection board for household energy storage, including a box body, a shock-absorbing board and a bottom board. Wheels are fixedly installed on both sides of the bottom of the bottom board. A shock-absorbing board is fixedly installed on the top of the bottom board, and a spring is fixedly installed between the shock-absorbing board and the bottom board. A sleeve rod is movably installed between movable parts. A sliding frame is fixedly installed on the surface of the box body, and a baffle is movably installed between the sliding frames. Ventilation openings are arranged on the surface of the box body between the sliding frames, and a heat dissipation fan is fixedly installed inside the box body. A lithium battery pack is fixedly installed inside the box body, and a protection board body is fixedly installed on the top of the lithium battery pack. By setting a series of structures, this application can actively dissipate heat or dissipate heat naturally according to the needs of users during use, can achieve equal charging of each single lithium-ion battery of the battery pack, and is convenient for moving the device. However, this application still has the problems of weak structural strength of the battery pack, easy expansion and deformation due to heat, poor safety, and cannot guarantee the service life. Summary of the Invention

[0005] Based on this, it is necessary to provide a battery pack housing and a battery pack for clamping a battery cell assembly in view of the above technical problems, so as to solve the problems of weak structural strength, easy expansion and deformation under heat, and poor safety of the battery pack.

[0006] The present invention provides a battery pack housing for clamping a battery cell assembly, including upper and lower cover plates and a cylinder body. The cylinder body includes a first end face and a second end face opposite to the first end face. The cylinder body includes a plurality of sets of tensioning components. Each tensioning component includes a tensioning part and a mounting part. The mounting parts are correspondingly arranged on the first end face and the second end face. Both ends of the tensioning part are fixedly installed on the mounting parts. The tensioning components tension the first end face and the second end face, so that the cylinder body clamps the battery cell assembly.

[0007] Preferably, the mounting part is a through groove. Both ends of the tensioning part are matched with the shape of the through groove and are clamped and fixed in the through groove. At least one tensioning part is provided between each group of through grooves.

[0008] Preferably, the width of the opening of the cross section of the through groove is smaller than the maximum width of the cross section of the through groove.

[0009] Preferably, the cross section of the through groove is trapezoidal or a circular segment with a central angle greater than 180 degrees.

[0010] Preferably, there are at least two sets of tensioning components. The cylinder body further includes at least one fastening component. Both ends of the fastening component are respectively fixedly connected to adjacent two tensioning parts.

[0011] Preferably, both ends of the fastening component are respectively fixedly connected to the center points of adjacent two tensioning parts. The fastening component is perpendicular to the tensioning part.

[0012] Preferably, the tensioning part is provided with a through hole for fixedly connecting with the fastening component.

[0013] Preferably, the fastening component includes a screw rod and a nut. Both ends of the screw rod respectively pass through the corresponding through holes of adjacent two tensioning parts. The nut is screwed in from both ends of the screw rod towards the center point of the screw rod, so that the tensioning part is extruded to generate deformation.

[0014] Preferably, the cylinder body further includes a third end face adjacent to the first end face and the second end face, and a fourth end face opposite to the third end face. The third end face is provided with a limiting part, and the fourth end face is provided with a pressing component cooperating with the limiting part to press the battery cell assembly.

[0015] The present invention further provides a battery pack, including the above battery pack housing for clamping a battery cell assembly.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention solves the problems of weak structural strength of the battery pack, easy expansion and deformation when heated, and poor safety. By arranging a tensioning assembly on the housing, the cylindrical body clamps the battery cell assembly, so that the battery pack is not easily deformed, enhancing the structural strength of the entire battery pack and improving the safety and service life of the battery pack.

[0018] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a battery pack housing in an embodiment;

[0020] Figure 2 It is an enlarged structural diagram of a battery pack housing in an embodiment;

[0021] Figure 3 It is an exploded structural diagram of a battery pack housing in an embodiment.

[0022] Reference Signs:

[0023] 1 - cylindrical body, 11 - first end face, 12 - second end face, 13 - third end face, 14 - fourth end face, 2 - cover plate, 21 - upper cover plate, 22 - lower cover plate, 3 - tensioning assembly, 31 - tensioning part, 32 - mounting part, 4 - fastening member, 5 - limiting part, 6 - pressing member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Embodiment 1

[0026] As shown in Figure 1 and Figure 2 , this embodiment shows a battery pack housing for clamping a battery cell assembly, including an upper cover plate 21, a lower cover plate 22 and a cylindrical body 1. The cylindrical body 1 includes a first end face 11 and a second end face 12 opposite to the first end face 11. The cylindrical body 1 includes several groups of tensioning assemblies 3. The tensioning assembly 3 includes a tensioning part 31 and a mounting part 32. The mounting part 32 is correspondingly arranged on the first end face 11 and the second end face 12. Both ends of the tensioning part 31 are fixedly installed on the mounting part 32. The tensioning assembly 3 tightens the first end face 11 and the second end face 12 to make the cylindrical body 1 clamp the battery cell assembly.

[0027] It should be noted that this embodiment solves the problems of weak structural strength of the battery pack, easy expansion and deformation when heated, and poor safety. By setting a tensioning component on the housing, the cylinder body clamps the battery cell assembly, making the battery pack not easily deformed, enhancing the structural strength of the entire battery pack, and improving the safety and service life of the battery pack.

[0028] Embodiment 2

[0029] This embodiment shows a battery pack housing for clamping a battery cell assembly, including an upper cover plate 21, a lower cover plate 22 and a cylinder body 1. The cylinder body 1 includes a first end face 11 and a second end face 12 opposite to the first end face 11. The cylinder body 1 includes a plurality of sets of tensioning components 3. The tensioning component 3 includes a tensioning part 31 and a mounting part 32. The mounting part 32 is correspondingly arranged on the first end face 11 and the second end face 12. Both ends of the tensioning part 31 are fixedly installed on the mounting part 32. The tensioning component 3 tightens the first end face 11 and the second end face 12, so that the cylinder body 1 clamps the battery cell assembly.

[0030] In this embodiment, the mounting part 32 is a through groove. Both ends of the tensioning part 31 are matched with the shape of the through groove and are snap-fitted and fixed in the through groove. According to the number of battery cell assemblies, the number of tensioning parts 31 arranged between each group of through grooves can be adjusted to improve the clamping effect of the tensioning component 3.

[0031] In this embodiment, the cross-section of the through groove is trapezoidal, and the width of the opening of the cross-section of the through groove is smaller than the maximum width of the cross-section of the through groove, so that both ends of the tensioning part 31 are snap-fitted with the through groove, enhancing the clamping effect of the tensioning component 3.

[0032] Embodiment 3

[0033] This embodiment shows a battery pack housing for clamping a battery cell assembly, including an upper cover plate 21, a lower cover plate 22 and a cylinder body 1. The cylinder body 1 includes a first end face 11 and a second end face 12 opposite to the first end face 11. The cylinder body 1 includes a plurality of sets of tensioning components 3. The tensioning component 3 includes a tensioning part 31 and a mounting part 32. The mounting part 32 is correspondingly arranged on the first end face 11 and the second end face 12. Both ends of the tensioning part 31 are fixedly installed on the mounting part 32. The tensioning component 3 tightens the first end face 11 and the second end face 12, so that the cylinder body 1 clamps the battery cell assembly.

[0034] In this embodiment, the mounting part 32 is a through groove. Both ends of the tensioning part 31 are matched with the shape of the through groove and are snap-fitted and fixed in the through groove. According to the number of battery cell assemblies, the number of tensioning parts 31 arranged between each group of through grooves can be adjusted. The cross-section of the through groove is trapezoidal, and the width of the opening of the cross-section of the through groove is smaller than the maximum width of the cross-section of the through groove, so that both ends of the tensioning part 31 are snap-fitted with the through groove, enhancing the clamping effect of the tensioning component 3.

[0035] In this embodiment, there are four sets of mounting parts 32, and there are five layers of tensioning parts 31, with four tensioning parts 31 in each layer. The cylinder body further includes a fastening member 4. A through hole is provided at the center point of the tensioning part 31, and the two ends of the fastening member 4 are respectively fixedly connected to the center points of two adjacent tensioning parts 31. In this embodiment, the fastening member 4 includes a screw rod and a nut. The two ends of the screw rod respectively penetrate vertically through the corresponding through holes of two adjacent tensioning parts 31, and the nut is screwed in from both ends of the screw rod towards the center point of the screw rod, so that the tensioning part 31 is deformed under extrusion, thereby enhancing the tension of the tensioning part to pull the cylinder body inward, and improving the structural strength and safety of the battery pack.

[0036] Embodiment 4

[0037] As Figure 3 shown, this embodiment shows a battery pack housing for clamping a battery cell assembly, including an upper cover plate 21, a lower cover plate 22 and a cylinder body 1. The cylinder body 1 includes a first end face 11 and a second end face 12 opposite to the first end face 11. The cylinder body 1 includes several sets of tensioning assemblies 3. The tensioning assembly 3 includes a tensioning part 31 and a mounting part 32. The mounting part 32 is correspondingly arranged on the first end face 11 and the second end face 12. The two ends of the tensioning part 31 are fixedly installed on the mounting part 32. The tensioning assembly 3 tightens the first end face 11 and the second end face 12, so that the cylinder body 1 clamps the battery cell assembly.

[0038] In this embodiment, the mounting part 32 is a through groove. The two ends of the tensioning part 31 are matched with the shape of the through groove and are clamped and fixed in the through groove. According to the number of battery cell assemblies, the number of tensioning parts 31 arranged between each group of through grooves can be adjusted. The cross-section of the through groove is trapezoidal, and the width of the opening of the cross-section of the through groove is smaller than the maximum width of the cross-section of the through groove, so that the two ends of the tensioning part 31 are clamped and matched with the through groove, enhancing the clamping effect of the tensioning assembly 3.

[0039] In this embodiment, there are three sets of mounting parts 32, and there are four layers of tensioning parts 31, with six tensioning parts 31 in each layer. The cylinder body further includes a fastening member 4. A through hole is provided at the center point of the tensioning part 31, and the two ends of the fastening member 4 are respectively fixedly connected to the center points of two adjacent tensioning parts 31. In this embodiment, the fastening member 4 includes a screw rod and a nut. The two ends of the screw rod respectively penetrate vertically through the corresponding through holes of two adjacent tensioning parts 31, and the nut is screwed in from both ends of the screw rod towards the center point of the screw rod, so that the tensioning part 31 is deformed under extrusion, thereby enhancing the tension of the tensioning part to pull the cylinder body inward, and improving the structural strength and safety of the battery pack.

[0040] It should be noted that the fastening component can also be a stud and a nut. The nut is welded and fixed at the through hole of the tensioning part, the stud is passed through between two adjacent tensioning parts, and is screwed into from the tensioning part far away from the nut; or a through hole with internal threads can be provided in one of two adjacent tensioning parts, and the nut is screwed into and fixed by the other tensioning part; or the riveting method can be adopted to rivet the fastening component between two adjacent tensioning parts.

[0041] In this embodiment, the cylinder body further includes a third end face 13 adjacent to the first end face 11 and the second end face 12, and a fourth end face 14 opposite to the position of the third end face 13. A limiting part 5 is provided on the third end face 13, and a pressing component 6 cooperating with the limiting part 5 is provided on the fourth end face 14. In this embodiment, the mortgaging component 6 is a bolt, the limiting part 5 is a limiting plate, and the bolt is screwed in from the outside of the cylinder body and cooperates with the limiting plate to press the battery cell assembly, improving the structural strength and safety of the battery pack.

[0042] Embodiment 5

[0043] This embodiment shows a battery pack, including the battery pack housing for clamping the battery cell assembly in any of the above embodiments.

[0044] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0045] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the invention patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A battery pack housing for clamping an electric core assembly, characterized in that, It includes upper and lower cover plates and a cylinder body. The cylinder body includes a first end face and a second end face opposite to the first end face. The cylinder body includes several sets of tensioning components. Each tensioning component includes a tensioning part and a mounting part. The mounting parts are correspondingly arranged on the first end face and the second end face. Both ends of the tensioning part are fixedly installed on the mounting parts. The tensioning components tension the first end face and the second end face to clamp an electric core assembly. There are at least two sets of tensioning components. The cylinder body also includes at least one fastening component. Both ends of the fastening component are respectively fixedly connected to adjacent tensioning parts. Both ends of the fastening component are respectively fixedly connected to the center points of adjacent tensioning parts. The fastening component is perpendicular to the tensioning part. The cylinder body also includes a third end face adjacent to the first end face and the second end face, and a fourth end face opposite to the third end face. The third end face is provided with a limiting part, and the fourth end face is provided with a pressing component cooperating with the limiting part to press the electric core assembly.

2. The battery pack housing for clamping the battery cell assembly according to claim 1, characterized in that, The mounting part is a through groove. Both ends of the tensioning part are matched with the shape of the through groove and are clamped and fixed in the through groove. There is at least one tensioning part between each set of through grooves.

3. The battery pack housing for clamping the battery cell assembly according to claim 2, characterized in that, The width of the opening of the cross section of the through groove is smaller than the maximum width of the cross section of the through groove.

4. The battery pack housing for clamping the battery cell assembly according to claim 2, wherein, The cross section of the through groove is trapezoidal or a circular segment with a central angle greater than 180 degrees.

5. The battery pack housing for clamping the battery cell assembly according to claim 1, wherein, The tensioning part is provided with a through hole for fixedly connecting with the fastening component.

6. The battery pack housing for clamping the battery cell assembly according to claim 5, characterized in that, The fastening component includes a screw rod and nuts. Both ends of the screw rod respectively pass through the corresponding through holes of adjacent tensioning parts. The nuts are screwed in from both ends of the screw rod towards the center point of the screw rod to cause the tensioning parts to be extruded and deformed.

7. A battery pack, characterized in that, It includes a battery pack housing for clamping an electric core assembly according to any one of claims 1-6.

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