Battery cell installation components, battery cell modules and battery packs

Abstract

The present invention discloses a battery cell installation assembly, a shell, including a bottom plate, a front plate and a rear plate extending upward from the front and rear edges of the bottom plate and opposite to each other, a first side plate extending inwardly from the left and right edges of the front plate along the opposite direction of the front plate and the rear plate, and a second side plate extending inwardly from the left and right edges of the rear plate along the opposite direction of the front plate and the rear plate, the shell is a sheet metal part, the bottoms of the first side plate and the second side plate are recessed upward to form a bending groove, and the opposite edges of the first side plate and the second side plate are welded together; a lower sheath, an upper sheath, a metal strip, and an upward hoisting portion arranged at the corner of the upper end of the shell. The present invention solves the problem in the prior art that forklift batteries cannot adapt to other forklift battery accommodating chambers of different sizes.

Description

Technical Field

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

[0002] At present, the global economy is facing a huge energy crisis. Energy conservation, emission reduction and the development of new energy sources that can replace fossil fuels are urgent needs of mankind. Among various new energy technologies, lithium batteries have broad development space.

[0003] The battery cavities of different forklifts have different sizes, and the corresponding forklift batteries have many specifications, which makes it difficult to form modularization. This brings many inconveniences in terms of cost, subsequent maintenance, interchangeable battery modules, and battery recycling. Summary of the invention

[0004] Based on this, it is necessary to provide a battery cell installation assembly, a battery cell module and a battery pack to address the problem that most of the forklift batteries are custom-designed and their specifications cannot adapt to other forklift battery cavities of different sizes.

[0005] The present invention provides a battery cell mounting assembly, comprising:

[0006] The shell comprises a bottom plate, a front plate and a rear plate extending upward from front and rear edges of the bottom plate and facing each other, a first side plate extending inwardly from left and right edges of the front plate along the direction in which the front plate and the rear plate are opposite to each other, and a second side plate extending inwardly from left and right edges of the rear plate along the direction in which the front plate and the rear plate are opposite to each other; the shell is a sheet metal part, the bottoms of the first side plate and the second side plate are recessed upwardly to form a bending groove, and the opposite edges of the first side plate and the second side plate are welded together;

[0007] A lower sheath, arranged at the bottom of the housing for receiving and fixing the battery core, comprises a box body, a first groove arranged at one side of the box body, and a first protrusion arranged at another opposite side of the box body, wherein the first groove and the first protrusion are adapted to connect a plurality of box bodies side by side;

[0008] An upper sheath, comprising a cover body correspondingly arranged on the top of the box body, a second groove arranged on one side of the cover body, and a second protrusion arranged on the other opposite side of the cover body, wherein the second groove and the second protrusion are adapted to connect a plurality of cover bodies side by side, and an electrode through hole for exposing the electrode of the battery cell is further arranged on the top of the cover body;

[0009] A metal strip, disposed on the upper sheath, for connecting like-polarity electrodes of the battery cell;

[0010] The corner of the upper end of the shell extends upward to form a hanging part, and the hanging part is provided with a hanging hole.

[0011] Preferably, the bottoms of the first side plate and the second side plate are recessed upward to form a bending groove.

[0012] Preferably, heat dissipation holes are also provided on the front plate and the rear plate.

[0013] Preferably, the first groove and the second groove are dovetail grooves.

[0014] The present invention also proposes a battery cell module, comprising the above-mentioned battery cell mounting assembly and a battery cell, wherein the lower end of the battery cell is arranged in the box body, the upper end of the battery cell is adapted to the cover body, and the metal strip is connected to the like-polarity electrode of the battery cell by screws.

[0015] The present invention also provides a battery pack, comprising the above-mentioned battery cell module, substrate, grid and pressure strip;

[0016] The grids are arranged side by side on the substrate, the battery cell module is arranged between two grids, the pressure strip is arranged on the grids, and two sides of the pressure strip are pressed on two adjacent battery cell modules.

[0017] Preferably, the grille includes a first mounting bar arranged on the substrate, a second mounting bar arranged above the first mounting bar, and a supporting bar arranged on the first mounting bar and used to support the second mounting bar, and the second mounting bar is provided with mounting screw holes.

[0018] Preferably, the pressure strip includes a plate body, two connecting plates extending upward from both sides of the plate body, and a pressure plate extending outward from the top of the connecting plates, the plate body is provided with mounting through holes corresponding to the mounting screw holes, and the pressure strip is connected to the grid by screws; the height of the grid is lower than the height of the battery cell module, and the pressure plate is pressed on two adjacent battery cell modules.

[0019] Preferably, both ends of the pressure strip are inwardly recessed to form positioning grooves, and the hoisting portion is arranged in the positioning grooves.

[0020] Preferably, the battery pack further comprises a partition disposed on the shell, a positioning hole disposed on the partition and adapted to the hoisting portion, and a positioning pin disposed in the hoisting hole for fixing the partition.

[0021] The present invention can be used to assemble and fix multiple battery cells to form a battery cell module by providing a battery cell installation assembly for installing battery cells. To cope with battery accommodating cavities of different sizes in different forklifts, multiple battery cell modules can be assembled together. A battery pack of specific specifications and models is formed by first connecting the battery cells in parallel and then in series, so as to facilitate subsequent maintenance, interchangeable battery modules and cascade utilization of batteries, thereby realizing the modularization of forklift battery cell modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a battery pack in one embodiment of a battery cell installation assembly in the present invention;

[0023] Figure 2 for Figure 1 A schematic structural diagram of a battery cell module in an embodiment;

[0024] Figure 3 for Figure 1 A schematic structural diagram of a housing in an embodiment;

[0025] Figure 4 for Figure 1 A schematic structural diagram of a cover body in an embodiment;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the box body in the embodiment;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure of the layering strip in the embodiment. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a battery cell mounting assembly, referring to Figure 1 and Figure 2 The battery cell installation assembly includes a shell 10, a lower sheath 20, an upper sheath 30 and a metal strip 40. The shell 10 includes a bottom plate 11, a front plate 12 and a rear plate 13 extending upward from the front and rear edges of the bottom plate 11 and opposite to each other, two first side plates 14 extending inwardly from the left and right edges of the front plate 12 along the opposite directions of the front plate 12 and the rear plate 13, and two second side plates 15 extending inwardly from the left and right edges of the rear plate 13 along the opposite directions of the front plate 12 and the rear plate 13; the shell 10 is a sheet metal part, the bottoms of the first side plates 14 and the second side plates 15 are recessed upward to form a bending groove 17, and the opposite edges of the first side plates 14 and the second side plates 15 are welded together; the lower sheath 20 is arranged at the bottom of the shell 10 for receiving and fixing the battery cell 1, and includes a box body 21, a box body 21 arranged at the box body 21 A first groove 22 on one side and a first protrusion 23 arranged on the other opposite side of the box body 21, the first groove 22 and the first protrusion 23 are adapted to connect multiple box bodies 21 side by side; the upper sheath 30 includes a cover body 31 correspondingly arranged on the top of the box body 21, a second groove 32 arranged on one side of the cover body 31 and a second protrusion 33 arranged on the other opposite side of the cover body 31, the second groove 32 and the second protrusion 33 are adapted to connect multiple cover bodies 31 side by side, and the top of the cover body 31 is also provided with an electrode through hole 34 for exposing the electrode of the battery cell 1; the metal strip 40 is arranged on the upper sheath 30, including a connection hole for connecting the like-sex electrodes of the battery cell 1.

[0032] Reference Figure 3 In this embodiment, the battery cell installation assembly is used to install and fix the battery cell 1, and the battery cell 1 can be fixedly arranged inside the shell 10, wherein the shell 10 is a sheet metal part, and the front plate 12, the rear plate 13, the first side plate 14 and the second side plate 15 are bent, and the first side plate 14 and the second side plate 15 opposite thereto are welded together to respectively constitute the left side plate and the right side plate of the shell 10, wherein the welding line is located on the plate surface of the left side plate and the right side plate, so as to grind the welding position. Ensure that the surface of the left and right side plates is flat. In addition, the bottom of the first side plate 14 and the second side plate 15 is recessed upward to form a bending groove 17, and a certain distance is reserved between the bottom plate 11, thereby avoiding the bottom corner of the shell 10 from being deformed and raised due to bending, so that the battery cell 1 is not placed flat, affecting the assembly of the metal strip 40.

[0033] Reference Figure 5 The lower sheath 20 is accommodated at the bottom of the shell 10, and its length and width dimensions are adapted to the dimensions inside the shell 10. The length and width dimensions inside the box body 21 are adapted to the length and width dimensions of the battery cell 1. The box bodies 21 are connected together by the cooperation of the first protrusion 23 and the first groove 22 and are arranged side by side in the shell 10.

[0034] Reference Figure 4 The upper sheath 30 is arranged above the lower sheath 20, wherein the cover 31 corresponds to the box body 21 below it one by one, the length and width of the inner part of the cover 31 are adapted to the length and width of the outer periphery of the top of the battery cell 1, and the cover 31 is connected to the cover 31 through the second groove 32 and the second protrusion 33, and the electrode through hole 34 is located at the top of the cover 31 near the two end edges. The metal strip 40 is preferably a long copper plate, and the connection holes are arranged on the copper plate and correspond to the electrodes below one by one. This structure uses the wall thickness of the upper and lower sheaths to control the distance between the battery cells 1, that is, to reserve space for the battery cell 1 to expand during charging, which is conducive to ventilation and heat dissipation.

[0035] The present invention can be used to assemble and fix multiple battery cells 1 to form a battery cell module by providing a battery cell installation assembly for installing battery cells 1. In response to battery accommodating cavities of different sizes in different forklifts, multiple battery cell modules can be assembled together. A battery pack of specific specifications and models is formed by first connecting the battery cells 1 in parallel and then in series, so as to facilitate subsequent maintenance, interchangeable battery modules and cascade utilization of batteries, thereby realizing the modularization of forklift battery cell modules.

[0036] Further, see Figure 3 The corner of the upper end of the housing 10 extends upward to form a hoisting portion 16, and the hoisting portion 16 is provided with a hoisting hole. In this embodiment, the hoisting portion 16 is provided at the corner of the upper end of the housing 10, and the diameter of the hoisting hole is 5 to 20 mm, which can facilitate the hoisting of the battery module.

[0037] Further, see Figure 3 The front plate 12, the rear plate 13 and the bottom plate 11 are also provided with heat dissipation holes. In this embodiment, the heat dissipation holes are four rounded square holes arranged side by side along the long side direction of the housing 10. The heat dissipation holes can be provided to facilitate the dissipation of heat generated by the battery during operation.

[0038] Further, see Figure 4 and Figure 5 , the first groove 22 and the second groove 32 are dovetail grooves. In this embodiment, the first groove 22 and the second groove 32 are preferably dovetail grooves, and the first protrusion 23 and the second protrusion 33 are dovetail-shaped protrusions. There are two first protrusions 23, one of which is arranged on the longer side panel of the cover body 31 near the corner, and the other is arranged on the other longer side panel of the cover body 31, and is arranged near the corner at the diagonal angle of the above-mentioned corner. The first groove 22 is arranged on one side of the first protrusion 23 on the longer side panel and corresponds to the first protrusion 23 on the other longer side panel. By setting a dovetail-shaped connection structure, the connection strength between the box bodies 21 and the connection strength between the cover bodies 31 are further improved.

[0039] The present invention also provides a battery cell module, referring to Figure 2, comprising the above-mentioned cell installation assembly and a cell 1, wherein the cell 1 is arranged in the box body 21, the upper end of the cell 1 is adapted to the cover body 31, and the metal strip 40 is connected to the like-pole electrodes of the cell 1 by screws. In this embodiment, the cell 1 is arranged in the cell installation assembly to form a telecommunication module, wherein the like-pole electrodes of the cell 1 are arranged on the same side, the metal strip 40 is arranged on the like-pole electrodes, wherein the connection holes correspond to the like-pole electrodes one by one, and the metal plate can be connected to each like-pole electrode one by one by screws, so as to realize the parallel connection of each cell 1 in the cell module.

[0040] The present invention also provides a battery pack, referring to Figure 1 , the battery pack includes the above-mentioned battery cell module, substrate 50, grid 60 and pressure strip 70; the grid 60 is arranged side by side on the substrate 50, the battery cell module is arranged between the two grids 60, the pressure strip 70 is arranged on the grid 60, and the two sides of the pressure strip 70 are pressed on the two adjacent battery cell modules. The present invention arranges a plurality of grids 60 arranged at intervals on the substrate 50, and arranges the battery cell module between the grids 60, and the pressure strip 70 is arranged on the grid 60 to generate a certain pressure on the battery cell module below it, so that the battery cell module is kept fixed under the restriction of the grid 60 and the friction force with the substrate 50. The present invention can be used to assemble and fix multiple battery cells 1 and form a battery cell module by setting a battery cell installation assembly for installing the battery cell 1. In response to different sizes of battery accommodating cavities in different forklifts, multiple battery cell modules can be assembled together, and a battery pack of specific specifications and models is formed by first connecting the battery cells 1 in parallel and then in series, so as to facilitate subsequent maintenance, interchange of battery modules and cascade utilization of batteries, thereby realizing modularization of forklift battery cell modules.

[0041] Furthermore, the grille 60 includes a first mounting bar disposed on the base plate 50, a second mounting bar disposed above the first mounting bar, and a support bar disposed on the first mounting bar and used to support the second mounting bar, wherein the second mounting bar is provided with mounting screw holes. In this embodiment, the first mounting bar, the second mounting bar, and the support bar are welded by channel steel, wherein the notch of the first mounting bar is disposed upward and connected to the base plate 50 by bolts, and the notch of the second mounting bar is disposed downward. The grille 60 welded by channel steel has the characteristics of light structure and high strength.

[0042] Further, see Figure 6The pressure strip 70 includes a plate body 71, two connecting plates 72 extending upward from both sides of the plate body 71, and a pressure plate 73 extending outward from the top of the connecting plate 72. The plate body 71 is provided with mounting through holes corresponding to the mounting screw holes. The pressure strip 70 is connected to the grid 60 by screws. The height of the grid 60 is lower than the height of the battery module, and the pressure plate 73 is pressed on two adjacent battery modules. The two ends of the pressure strip 70 are inwardly recessed to form positioning grooves 74, and the hanging part 16 is arranged in the positioning grooves 74. In this embodiment, the pressure strip 70 is connected to the grid 60 by screws. The pressure strip 70 is located between the two hanging parts 16. The spacing between the two hanging parts 16 on the longer side of the housing 10 is slightly larger than the spacing between the two positioning grooves 74. Therefore, the positioning groove 74 can further limit the movement of the battery module along the direction of the long side of the housing 10, ensuring that the telecommunications module is completely fixed in the grid 60, and enhancing the overall strength and stability of the battery module.

[0043] Furthermore, the battery pack also includes a partition disposed on the shell 10, a positioning hole disposed on the partition and adapted to the hoisting portion 16, and a positioning pin disposed in the hoisting hole for fixing the partition. In this embodiment, the partition is fixed by disposing a partition on the shell 10, so that the hoisting portion 16 extends from the positioning hole, and the positioning pin is inserted into the hoisting hole. At the same time, a grid 60 and a battery cell module can be further disposed on the partition to expand the battery pack in the vertical direction to cope with battery accommodating cavities of different heights, thereby improving the adaptability of the battery pack.

[0044] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A battery pack, characterized in that: Including battery cell modules, substrates, grids and pressure strips; The grids are arranged side by side on the substrate, the battery module is arranged between two grids, the pressure strip is arranged on the grids, and the two sides of the pressure strip are pressed on two adjacent battery modules; The battery cell module comprises a battery cell mounting assembly and a battery cell. The battery cell installation assembly comprises: The shell comprises a bottom plate, a front plate and a rear plate extending upward from front and rear edges of the bottom plate and facing each other, a first side plate extending inwardly from left and right edges of the front plate along the direction in which the front plate and the rear plate are opposite to each other, and a second side plate extending inwardly from left and right edges of the rear plate along the direction in which the front plate and the rear plate are opposite to each other, the shell is a sheet metal part, the bottoms of the first side plate and the second side plate are recessed upwardly to form a bending groove, and the opposite edges of the first side plate and the second side plate are welded together; A lower sheath, arranged at the bottom of the housing for receiving and fixing the battery core, comprising a box body, a first groove arranged at one side of the box body, and a first protrusion arranged at another opposite side of the box body, wherein the first groove is adapted to the first protrusion and is used to connect a plurality of box bodies side by side; An upper sheath, comprising a cover body correspondingly arranged above the box body, a second groove arranged on one side of the cover body, and a second protrusion arranged on the other opposite side of the cover body, wherein the second groove is adapted to the second protrusion and is used to connect a plurality of cover bodies side by side, and an electrode through hole is further arranged on the top of the cover body for exposing the electrode of the battery cell; a metal strip, disposed on the upper sheath, comprising connection holes for connecting like-sex electrodes of the battery cell; The upper end of the shell extends upward from the corner to form a hanging part, and the hanging part is provided with a hanging hole; The lower end of the battery cell is arranged in the box body, the upper end of the battery cell is adapted to the cover body, and the metal strip is connected to the like-polarity electrode of the battery cell by screws; The grille comprises a first mounting bar arranged on the base plate, a second mounting bar arranged above the first mounting bar, and a supporting bar arranged on the first mounting bar and used to support the second mounting bar, wherein the second mounting bar is provided with mounting screw holes; The pressure strip includes a plate body, two connecting plates extending upward from both sides of the plate body, and a pressing plate extending outward from the top of the connecting plate, the plate body is provided with a mounting through hole corresponding to the mounting screw hole, the pressure strip is connected to the grid by screws, and the pressing plate is pressed on two adjacent battery cell modules; The battery pack further includes a partition plate disposed on the shell, a positioning hole disposed on the partition plate and adapted to the hanging portion, and a positioning pin disposed in the hanging hole for fixing the partition plate.

2. The battery pack according to claim 1, characterized in that: The front plate, the rear plate and the bottom plate are also provided with heat dissipation holes.

3. The battery pack according to claim 1, wherein: The first groove and the second groove are dovetail grooves.

4. The battery pack according to claim 1, wherein: The two ends of the pressure strip are inwardly recessed to form positioning grooves, and the hoisting part is arranged in the positioning grooves.

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