Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises at least one battery module, any battery module comprises a plurality of battery modules and a reinforcing connecting component, the battery modules are stacked together in a preset direction, and the reinforcing connecting component is arranged between the battery modules. Any two adjacent battery modules are detachably connected through a reinforcing connecting component. According to the battery pack provided by the invention, the number of the battery modules can be adjusted according to actual requirements, and the battery modules can be connected into a whole by utilizing the reinforcing connecting components, so that the whole battery modules are firmer, and the requirements of users on different regular battery boxes are met. Besides, the battery module and the reinforcing connecting component are detachably connected, so that the battery module and the reinforcing connecting component are convenient to maintain or replace, and the disassembled battery module and the disassembled reinforcing connecting component can be reused, so that the cost is saved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack. Background Art

[0002] At present, with the increasing maturity of lithium-ion battery technology, lithium battery electric forklifts are gradually replacing lead-acid battery forklifts on the market. As a special electric vehicle, the battery pack of an electric forklift is generally designed according to the appearance of the forklift. The installation dimensions of the battery compartment of the power battery box of different forklifts are different, resulting in a wide variety of power battery box sizes. In addition, the voltage, current and capacity requirements of various types of forklifts are also different. These have led to many specifications of forklift power battery boxes, which has resulted in a high cost for the development and design of electric forklift battery packs. In addition, the integrated structure brings many inconveniences to subsequent battery maintenance, battery replacement and reuse of battery pack structural parts. Utility Model Content

[0003] The purpose of the present application is to provide a battery pack, which to a certain extent solves the technical problem in the prior art that the power battery box of a lithium battery electric forklift has many specifications, resulting in high development and design costs.

[0004] The present application provides a battery pack, comprising: at least one battery module, any of the battery modules comprising a battery module and a reinforcing connecting member, the battery modules are multiple in number and stacked together along a preset direction, and any two adjacent battery modules are detachably connected via the reinforcing connecting member.

[0005] In the above technical solution, further, the reinforcing connection member and the battery module are detachably connected via a fastening member.

[0006] In any of the above technical solutions, further, the battery pack also includes a base, the base is formed with a mounting groove, and the battery module is installed in the mounting groove.

[0007] In any of the above technical solutions, further, the battery pack also includes a lifting ear, and the lifting ear is installed on the edge of the base.

[0008] In any of the above technical solutions, further, the battery pack also includes an auxiliary reinforcement component, and the battery module is connected to the base through the auxiliary reinforcement component.

[0009] In any of the above technical solutions, further, the auxiliary reinforcement member is connected to the battery module by welding.

[0010] In any of the above technical solutions, further, the auxiliary reinforcement member is detachably connected to the base via a fastening member.

[0011] In any of the above technical solutions, further, at least one of the battery modules has a mounting notch formed on the top, the battery pack includes a shell and a maintenance cover, the shell is arranged outside the battery module, and the shell is formed with an auxiliary mounting groove that is concave and matches the mounting notch, and the auxiliary mounting groove is used to install electronic components;

[0012] Any of the auxiliary installation slots is equipped with the maintenance cover, and the maintenance cover is detachably connected to the housing.

[0013] In any of the above technical solutions, further, the number of the mounting notches is two, and they are respectively arranged on both sides of the top of the battery module, the number of the auxiliary mounting grooves is two, and they correspond one-to-one to the two mounting notches, one of the auxiliary mounting grooves is a high-voltage electronic component mounting groove, and the other auxiliary mounting groove is a low-voltage electronic component mounting groove.

[0014] In any of the above technical solutions, further, the battery pack also includes a battery management module, an inverter module and a first insulating base; wherein the first insulating base is arranged in the low-voltage electronic component installation groove, and the battery module and the inverter module are both arranged on the first insulating base.

[0015] In any of the above technical solutions, further, the battery pack also includes a second insulating base and an insulating baffle both arranged in the high-voltage electronic component installation groove, and the insulating baffle is arranged on the second insulating base to divide the high-voltage electronic component installation groove into a positive high-voltage electronic component installation groove and a negative high-voltage electronic component installation groove.

[0016] In any of the above technical solutions, further, the battery pack also includes a relay, a fuse and a current sensor; wherein the relay and the fuse are arranged in the positive high-voltage electronic component installation slot, and the current sensor is arranged in the negative high-voltage electronic component installation slot;

[0017] The relay and the fuse are arranged on one side of the insulating baffle, and the current sensor is arranged on the other side of the insulating baffle.

[0018] In any of the above technical solutions, further, the battery module includes a battery cell assembly, an upper pressing plate, a lower pressing plate, an insulating protective plate, a first side cover plate and a second side cover plate; wherein the battery cell assembly includes a plurality of battery cells, and the plurality of battery cells are stacked together in sequence along a direction perpendicular to the large surface thereof;

[0019] The upper pressing plate and the lower pressing plate are respectively installed at the top and bottom of the battery cell assembly along the height direction thereof, and the insulating protection plate is arranged between the upper pressing plate, the lower pressing plate and the battery cell assembly; the first side cover plate and the second side cover plate are both C-shaped, and are respectively installed on both sides of the battery cell assembly, the upper pressing plate and the lower pressing plate along the width direction thereof.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] The battery pack provided in the present application can adjust the number of battery modules according to actual needs, and can use reinforced connecting components to connect the battery modules into a whole, making the battery module as a whole more solid, thereby meeting the user's needs for irregular battery boxes.

[0022] In addition, the battery module and the reinforcing connecting member are connected in a detachable manner, which is convenient for maintenance or replacement, and the disassembled battery module and the reinforcing connecting member can be reused, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a partial structure of a battery pack provided in an embodiment of the present application;

[0026] Figure 3 Another partial structural schematic diagram of a battery pack provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the structure of a base provided in an embodiment of the present application;

[0029] Figure 6 Another schematic diagram of the structure of the battery module provided in the embodiment of the present application;

[0030] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at A;

[0031] Figure 8 An exploded view of a battery module provided in an embodiment of the present application;

[0032] Fig. 9 An assembly diagram of a battery module provided in an embodiment of the present application;

[0033] Fig.10 A schematic structural diagram of the first side cover provided in an embodiment of the present application.

[0034] Reference numerals:

[0035] 1-battery module, 11-battery module, 111-cell assembly, 112-upper pressure plate, 1121-first avoidance gap, 113-lower pressure plate, 114-insulating protection plate, 1141-positioning protrusion, 1142-third avoidance gap, 115-first side cover, 116-second side cover, 117-first end plate, 118-second end plate, 119-upper end insulator, 120-lower end insulator, 121-third fastening member, 122-fourth fastening member, 123-fifth fastening member, 124-sixth fastening member, 125-eighth fastening member, 126-installation gap, 127-first battery module, 128-second Battery module, 12-reinforcement connecting member, 2-base, 21-installation groove, 3-lifting ear, 4-auxiliary reinforcement member, 5-battery management module, 6-inverter module, 7-first insulating base, 8-relay, 9-fuse, 10-current sensor, 13-second insulating base, 14-insulating baffle, 15-shell, 151-shell, 152-inner shell, 153-bottom mounting plate, 154-high-voltage electronic component installation slot, 1541-positive high-voltage electronic component installation slot, 1542-negative high-voltage electronic component installation slot, 155-low-voltage electronic component installation slot, 16-maintenance cover, 17-upper bus, 18-first fastening member. DETAILED DESCRIPTION

[0036] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0037] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0039] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Refer to the following Figures 1 to 10 A battery pack according to some embodiments of the present application is described.

[0042] See also Figure 4 As shown, an embodiment of the present application provides a battery pack, comprising: at least one battery module 1, any battery module 1 comprises a battery module 11 and a reinforcing connecting member 12, the number of battery modules 11 is multiple and they are stacked together along a preset direction, and any two adjacent battery modules 11 are detachably connected by the reinforcing connecting member 12, that is, the battery module 11 and the reinforcing connecting member 12 adopt a detachable connection structure.

[0043] According to the structure described above, the battery pack provided in the present application can adjust the number of battery modules 11 according to actual needs, and can use the reinforcing connecting components 12 to connect the battery modules 11 into a whole, so that the battery module 1 is more solid as a whole, thereby meeting the user's needs for irregular battery boxes.

[0044] In addition, the battery module 11 and the reinforcing connection member 12 are connected in a detachable manner, which is convenient for maintenance or replacement, and the disassembled battery module 11 and the reinforcing connection member 12 can be reused, thereby saving costs.

[0045] Further, preferably, the preset direction is the horizontal direction, that is, the multiple battery modules 11 in each battery module 1 are a single-layer structure in the vertical direction rather than a multi-layer structure. This structure is more stable and will not easily cause pressure damage to the lower structure like the upper structure in the multi-layer structure. It is safer and more reliable. It should be noted that the preset direction can be a single direction such as the X direction or the Y direction. Of course, it is not limited to this. The preset direction can also include two directions, namely the X direction and the Y direction. In this case, the multiple battery modules 11 are finally arranged in a square array. Of course, the multiple battery modules 11 can also be arranged in a multi-layer structure. At this time, the preset direction is a single Z direction, or the preset direction includes the X direction and the Z direction, or the preset direction includes the Y direction and the Z direction, or the preset direction includes the X direction, the Y direction and the Z direction. The specific selection is based on actual needs. Of course, for the multi-layer structure, especially the upper structure, it is also necessary to provide a bracket to separate it from the lower structure to avoid pressure damage to the lower structure.

[0046] In this embodiment, preferably, Figure 4 As shown, the reinforcing connecting member 12 and the battery module 11 are detachably connected by a fastening member, i.e., a first fastening member 18, such as a screw or a bolt, which is a common connection method with a simple structure, convenient operation, and low cost. Of course, the connection method between the reinforcing connecting member 12 and the battery module 11 is not limited to the above, and can also be connected by a snap connection, i.e., a buckle connection method, which is selected according to actual needs.

[0047] Furthermore, preferably, the reinforcing connection member 12 is provided with a countersunk through hole, and the head of the first fastening member 18 can be hidden inside the countersunk through hole to avoid interference with other structures.

[0048] In this embodiment, preferably, Figure 4 As shown, there are multiple reinforcing connection members 12, one part of which is a straight-line strip steel plate, which has sufficient strength and rigidity to meet the reinforcement requirements and can connect battery modules 11 of the same height, and another part of the reinforcing connection members 12 is a Z-shaped strip steel plate, which can connect battery modules 11 of different heights. Of course, the structure of the reinforcing connection member 12 is not limited to this, and it can also be L-shaped or other shapes.

[0049] In this embodiment, preferably, Figure 4 and Figure 5 As shown, the battery pack further includes a base 2 , the base 2 is formed with a mounting groove 21 , and the battery module 1 is mounted in the mounting groove 21 .

[0050] According to the structure described above, the base 2 plays a role in supporting the battery module 1, and preferably, the battery module 1 is installed in the installation groove 21 of the base 2, so as to facilitate the upper limit positioning of the battery module 1 in the X direction and the Y direction in the horizontal plane, so that the battery module 1 is more stable, and preferably, the battery module 1 is adapted to the installation groove 21.

[0051] Further, preferably, the material of the base 2 may be Q235, but of course, it is not limited thereto.

[0052] In this embodiment, preferably, Figures 1 to 3 As shown, the battery pack further includes a lifting ear 3 , and the lifting ear 3 is installed on the edge of the base 2 .

[0053] According to the structure described above, it can be known that the lifting lug 3 is installed on the edge of the base 2 for easy lifting, and preferably, there are multiple lifting lugs 3 that are evenly distributed on two opposite sides of the base 2.

[0054] Further, preferably, the lifting lug 3 and the base 2 can be welded together or connected by bolts.

[0055] In this embodiment, preferably, Figure 4 As shown, the battery pack further includes an auxiliary reinforcement member 4 , and the battery module 1 is connected to the base 2 via the auxiliary reinforcement member 4 .

[0056] According to the structure described above, it can be seen that by designing the auxiliary reinforcement member 4 between the battery module 1 and the base 2, the connection between the two can be further reinforced.

[0057] Further, preferably, the auxiliary reinforcement member 4 is an L-shaped angle steel.

[0058] Further, preferably, the number of the auxiliary reinforcement members 4 is two, and they are respectively arranged on two opposite sides of the battery module 1. Of course, the number and arrangement of the auxiliary reinforcement members 4 are not limited to the above, and can also be selected according to actual needs.

[0059] In this embodiment, preferably, Figure 4 As shown, the auxiliary reinforcement member 4 is connected to the battery module 1 by welding, so that the auxiliary reinforcement member 4 and the battery module 1 are more firmly connected. Of course, this is not limited to this. The auxiliary reinforcement member 4 and the battery can also be connected by gluing.

[0060] In this embodiment, preferably, Figure 4 As shown, the auxiliary reinforcement member 4 and the base 2 are detachably connected via a fastening member, i.e., a second fastening member such as a screw or a bolt, which is a detachable connection method and is convenient for subsequent maintenance or replacement operations.

[0061] In this embodiment, preferably, Figures 2 to 4 As shown, a mounting notch 126 is formed on the top of at least one battery module 1, and the battery pack includes a shell 15 and a maintenance cover 16. The shell 15 covers the outside of the battery module 1, and the shell 15 is formed with an inwardly concave auxiliary mounting groove adapted to the mounting notch 126, and the auxiliary mounting groove is used to install electronic components; any auxiliary mounting groove is equipped with a maintenance cover 16, and the maintenance cover 16 is detachably connected to the shell 15.

[0062] According to the structure described above, it can be known that the electronic components are integrated at the top of the battery module 1, which makes full use of the space on the top, thereby saving horizontal space, with higher integration, and is separated from the battery module 1 below by the outer shell 15, which is safer and more reliable. Preferably, the bottom wall of the auxiliary mounting groove is a 1.5 mm thick Q235 steel plate.

[0063] In addition, by opening the maintenance cover 16, the electronic components in the auxiliary installation slot can be repaired or replaced at any time, which is simple and convenient to operate.

[0064] Further, preferably, the maintenance cover 16 is detachably connected to the housing 15 via bolts, or detachably connected via buckles.

[0065] Further, preferably, Figure 1 and Figure 2 As shown, the housing 15 includes an outer housing 151, an inner housing 152 and a bottom mounting plate 153; wherein the top of the outer housing 151 is in a two-step shape, which is mainly caused by the different heights of the two battery modules 1. Of course, it is not limited to this and can also be designed according to actual needs;

[0066] The aforementioned maintenance openings are provided on both sides of the top of the high step, the inner shell 152 is arranged between the two maintenance openings, and an opening is formed inside the inner shell 152. The inner shell 152 can be welded to the inner wall of the outer shell 151, or can be integrally formed, and the specific design is based on actual needs; any maintenance opening includes side walls, and a bottom mounting plate 153 is provided in each maintenance opening, forming the aforementioned auxiliary mounting groove structure.

[0067] It should be noted that the battery modules 11 in the same battery module 1 are designed to have structures of different heights, that is, to form a height difference, so that a mounting notch 126 is formed on the top of the same battery module 1 .

[0068] In this embodiment, preferably, Figures 2 to 4As shown, there are two mounting notches 126, which are respectively arranged on both sides of the top of the battery module 1, and there are two auxiliary mounting slots, which correspond to the two mounting notches 126 one by one. One of the auxiliary mounting slots is a high-voltage electronic component mounting slot 154, and the other auxiliary mounting slot is a low-voltage electronic component mounting slot 155. The high and low voltage electronic components are placed separately, which is safer and more reliable. Of course, the number of mounting notches 126 and auxiliary mounting slots is not limited to two, and can also be one or more than two, such as three, etc., which are designed according to actual needs.

[0069] It should be noted that: in the present embodiment, there are two battery modules 1, namely the first battery module 127 and the second battery module 128, each battery module 1 includes four battery modules 11, and for the second battery module 128, among the four battery modules 11 it includes, the two middle battery modules 11 are of the same height and higher than the two battery modules 11 on both sides, thereby forming two installation notches 126. In addition, in the present embodiment, the height of the first battery module 127 is the same as the height of the battery modules 11 on both sides of the second battery module 128, that is, a height difference is formed. Correspondingly, the outer shell 15 needs to make adaptive changes. Of course, it is not limited to this. The two battery modules 1 can also be of the same height, and the multiple battery modules 11 in each battery module 1 can also be of the same height, or there can be a height difference, which is designed according to actual needs.

[0070] Of course, the number of battery modules 1 is not limited to two in the present embodiment, but may be one or more than two, such as three, four, five, etc., depending on actual needs. In addition, the number of battery modules 11 contained in each battery module 1 is not limited to four, but may be less than four, such as two or three, or greater than four, such as five or six, six, etc., depending on actual needs.

[0071] In this embodiment, preferably, Figure 3 As shown, the battery pack also includes a battery management module 5, an inverter module 6 and a first insulating base 7; wherein the first insulating base 7 is arranged in one of the mounting notches 126, i.e., the low-voltage electronic component mounting groove 155, and the battery management module 5 and the inverter module 6 are both arranged on the first insulating base 7.

[0072] According to the structure described above, the battery management module 5 requires additional power supply because an inverter module 6 is required. Therefore, the inverter module 6 and the battery management module 5 are integrated on the same first insulating base 7, which has a higher degree of integration, and the first insulating base 7 plays a role of insulation protection.

[0073] Further, preferably, the material of the first insulating base 7 is bakelite, but of course, it is not limited thereto.

[0074] Further, preferably, the first insulating base 7 is a square flat plate, but is not limited thereto.

[0075] In this embodiment, preferably, Figure 3 As shown, the battery pack also includes a second insulating base 13 and an insulating baffle 14, both of which are arranged in the high-voltage electronic component installation groove 154, and the insulating baffle 14 is arranged on the second insulating base 13 to divide the high-voltage electronic component installation groove 154 into a positive high-voltage electronic component installation groove 1541 and a negative high-voltage electronic component installation groove 1542.

[0076] Furthermore, preferably, the battery pack also includes a relay 8, a fuse 9 and a current sensor 10; wherein the relay 8 and the fuse 9 are arranged in the positive high-voltage electronic component mounting slot 1541, and the current sensor 10 is arranged on the negative high-voltage electronic component mounting slot 1542. It should be noted that the relay 8, the fuse 9 and the current sensor 10 are all arranged on the second insulating base 13, but the positive electrode area and the negative electrode area are distinguished by the insulating baffle 14.

[0077] According to the structure described above, it can be seen that high-voltage electronic components such as relays 8, fuses 9 and current sensors 10 are integrated on the same second insulating base 13 and placed separately in an installation notch 126, which is safer and more reliable. In addition, the positive electronic components (relays 8 and fuses 9) are separated from the negative electronic components (current sensor 10) by an insulating baffle 14, reducing the risk of accidental contact between the positive and negative poles during the battery pack production process.

[0078] Further, preferably, the second insulating base 13 and the insulating baffle 14 are both made of bakelite, but are not limited thereto.

[0079] Further, preferably, the second insulating base 13 and the insulating baffle 14 are both square flat plates, but of course, this is not limited to this.

[0080] Further, preferably, the insulating baffle 14 and the second insulating base 13 are an integrated structure, or a split structure, and are connected by bolts.

[0081] Further, preferably, the first insulating base 7 and the second insulating base 13 are bonded to the inner wall of the housing 15 or connected by bolts.

[0082] In this embodiment, preferably, Figures 8 to 10As shown, the battery module 11 includes a cell assembly 111, an upper pressing plate 112, a lower pressing plate 113, an insulating protective plate 114, a first side cover plate 115 and a second side cover plate 116; wherein the cell assembly 111 includes a plurality of cells, and the plurality of cells are sequentially stacked together along a direction perpendicular to the large surface thereof, that is, the height direction of the cell assembly 111 is arranged perpendicular to the large surface of the cell;

[0083] The upper pressing plate 112 and the lower pressing plate 113 are respectively installed at the top and bottom of the battery cell assembly 111 along its height direction, and an insulating protection plate 114 is provided between the upper pressing plate 112 and the lower pressing plate 113 and the battery cell assembly 111 to play the role of insulation protection;

[0084] The first side cover 115 and the second side cover 116 are both C-shaped and are respectively installed on both sides of the battery cell assembly 111, the upper pressure plate 112 and the lower pressure plate 113 along their width directions. It can be seen that the C-shaped side cover can be buckled on both sides of the battery cell assembly 111 and the upper and lower pressure plates 113, and the assembly is more stable.

[0085] In this embodiment, preferably, Figure 8 and Fig. 9 As shown, the first side cover plate 115 is detachably connected to the upper pressure plate 112 and the lower pressure plate 113 respectively through a fastening member, that is, a third fastening member 121 such as a screw or a bolt. This is a detachable connection method, which is convenient for later operation and maintenance, and the preload force can be adjusted by adjusting the torque of the screw or bolt.

[0086] In this embodiment, preferably, Figure 8 and Fig. 9 As shown, the second side cover plate 116 is detachably connected to the upper pressure plate 112 and the lower pressure plate 113 respectively through a fastening member, namely the fourth fastening member 122, which is a detachable connection method, which is convenient for later operation and maintenance, and the preload force can be adjusted by adjusting the torque of the screws or bolts.

[0087] In this embodiment, preferably, Figure 8 As shown, at least two positioning protrusions 1141 are formed on one side of the insulating protection plate 114 close to the battery cell assembly 111 and are arranged at intervals along the width direction of the battery cell assembly 111 .

[0088] According to the structure described above, at least two positioning protrusions 1141 respectively limit the two sides of the battery cell assembly 111 along its width direction, and can also ensure the pressure-resistant insulation performance of the battery module 11.

[0089] Further, preferably, the number of the positioning protrusions 1141 is four, and along the width direction of the battery cell assembly 111, two positioning protrusions 1141 are provided on each side of the battery cell assembly 111. Of course, the number of the positioning protrusions 1141 is not limited thereto and can also be designed according to actual needs.

[0090] In this embodiment, preferably, Figure 8 and Fig. 9 As shown, the battery module 11 further includes a first end plate 117, a second end plate 118, an upper end insulating member 119 and a lower end insulating member 120; wherein the first end plate 117 and the second end plate 118 are respectively disposed at both ends of the battery cell assembly 111 along its length direction;

[0091] An upper end insulating member 119 is arranged between the inner side of the top end of the first end plate 117 and the upper pressure plate 112, and a lower end insulating member 120 is arranged between the inner side of the bottom end of the first end plate 117 and the lower pressure plate 113; an upper end insulating member 119 is arranged between the inner side of the top end of the second end plate 118 and the upper pressure plate 112, and a lower end insulating member 120 is arranged between the inner side of the bottom end of the second end plate 118 and the lower pressure plate 113.

[0092] According to the structure described above, the two upper end insulating members 119 and the two lower end insulating members 120 play a role of insulation protection.

[0093] In this embodiment, preferably, Figure 8 and Fig. 9 As shown, the upper end insulating member 119 is detachably connected to the upper pressure plate 112 and the first end plate 117 respectively by fastening members such as screws or bolts (it should be noted that in order to distinguish the fastening members in different positions mentioned above, the fastening member connected between the upper end insulating member 119 and the upper pressure plate 112 is named the fifth fastening member 123, and the fastening member connected between the upper end insulating member 119 and the first end plate 117 is named the sixth fastening member 124). It is a detachable connection method, which is convenient for later operation and maintenance. Of course, a snap-on connection method can also be adopted.

[0094] In this embodiment, preferably, Figure 8 As shown, the lower end insulating member 120 is detachably connected to the lower pressure plate 113 and the second end plate 118 respectively by fastening members such as screws or bolts (it should be noted that in order to distinguish the fastening members in different positions mentioned above, the fastening member connected between the lower end insulating member 120 and the lower pressure plate 113 is named as the seventh fastening member, and the fastening member connected between the lower end insulating member 120 and the second end plate 118 is named as the eighth fastening member 125). It is a detachable connection method, which is convenient for later operation and maintenance. Of course, a snap-on connection method can also be adopted.

[0095] In this embodiment, preferably, Figure 8 As shown, the upper end insulating member 119 is L-shaped, and includes a first horizontal plate and a first vertical plate. The first horizontal plate is fixed to the upper surface of the upper pressing plate 112, and the first vertical plate is located at one end of the battery cell assembly 111 along its length direction and is spaced apart.

[0096] A first avoidance gap 1121 is formed at one end of the upper pressure plate 112 along its length direction, and correspondingly, a third avoidance gap 1142 is formed on the insulating protection plate 114 for avoiding the sixth fastening member 124; an upper bus 17 is connected between the upper parts of two adjacent battery modules 11, and a portion of the upper bus 17 extends into the L-shaped space of the upper end insulating member 119 of one of the battery modules 11, and a portion of the upper bus 17 extends into the L-shaped space of the upper end insulating member 119 of the other battery module 11.

[0097] According to the structure described above, the upper bus 17 used to connect the two battery modules 11 is installed on the inner side of the two upper end insulating parts 119, that is, it is shielded by the two upper end insulating parts 119, which completely avoids the exposure of the live bus from a physical level and reduces safety risks.

[0098] In this embodiment, preferably, Figure 8 As shown, the lower end insulating member 120 is L-shaped, the second horizontal plate is fixed to the upper surface of the upper pressing plate 112, and the second vertical plate is located at one end of the battery cell assembly 111 along its length direction and is arranged at intervals;

[0099] A second avoidance gap is formed at one end of the lower pressure plate 113 along its length direction, and correspondingly, a fourth avoidance gap is formed on the insulating protection plate 114 for avoiding the eighth fastening member 125); a lower bus is connected between the lower parts of two adjacent battery modules 11, and a portion of the lower bus extends into the L-shaped space of the lower end insulating member 120 of one of the battery modules 11, and a portion of the lower bus extends into the L-shaped space of the lower end insulating member 120 of the other battery module 11.

[0100] According to the structure described above, the lower bus used to connect the two battery modules 11 is installed on the inner side of the two lower end insulating parts 120, that is, it is shielded by the two lower end insulating parts 120, which completely avoids the exposure of the live bus from a physical level and reduces safety risks.

[0101] In this embodiment, preferably, the gaps in the battery module 11 are filled with thermally conductive adhesive, which can avoid the problem of welding reliability of the aluminum bar connection caused by the shaking of the battery cell assembly 111 in the module, while increasing the heat dissipation performance of the entire battery module 11.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: At least one battery module, any of which includes a battery module and a reinforcing connecting member, the battery modules are multiple in number and stacked together along a preset direction, and any two adjacent battery modules are detachably connected via the reinforcing connecting member.

2. The battery pack according to claim 1, characterized in that: The reinforcing connection member is detachably connected to the battery module via a fastening member.

3. The battery pack according to claim 1, characterized in that: The battery pack further includes a base having a mounting groove formed therein, and the battery module is mounted in the mounting groove.

4. The battery pack according to claim 3, characterized in that: The battery pack also includes a lifting ear, and the lifting ear is installed on the edge of the base.

5. The battery pack according to claim 3, characterized in that: The battery pack further includes an auxiliary reinforcement member, and the battery module is connected to the base via the auxiliary reinforcement member.

6. The battery pack according to claim 5, characterized in that: The auxiliary reinforcement member is connected to the battery module by welding; and / or The auxiliary reinforcement member is detachably connected to the base via a fastening member.

7. The battery pack according to claim 1, characterized in that: A mounting notch is formed on the top of at least one of the battery modules, and the battery pack comprises a shell and a maintenance cover, the shell cover is arranged outside the battery module, and the shell is formed with an auxiliary mounting groove which is concave and matches the mounting notch, and the auxiliary mounting groove is used to install electronic components; Any of the auxiliary installation slots is equipped with the maintenance cover, and the maintenance cover is detachably connected to the housing.

8. The battery pack according to claim 7, characterized in that: There are two mounting notches, which are respectively arranged on both sides of the top of the battery module. There are two auxiliary mounting slots, which correspond one-to-one to the two mounting notches. One of the auxiliary mounting slots is a high-voltage electronic component mounting slot, and the other auxiliary mounting slot is a low-voltage electronic component mounting slot.

9. The battery pack according to claim 8, characterized in that: The battery pack also includes a battery management module, an inverter module and a first insulating base; wherein the first insulating base is arranged in the low-voltage electronic component installation groove, and the battery module and the inverter module are both arranged on the first insulating base.

10. The battery pack according to claim 8, characterized in that: The battery pack also includes a second insulating base and an insulating baffle both disposed in the high-voltage electronic component mounting groove, and the insulating baffle is disposed on the second insulating base to divide the high-voltage electronic component mounting groove into a positive high-voltage electronic component mounting groove and a negative high-voltage electronic component mounting groove.

11. The battery pack according to claim 10, characterized in that: The battery pack further includes a relay, a fuse and a current sensor; wherein the relay and the fuse are arranged in the positive high-voltage electronic component installation slot, and the current sensor is arranged in the negative high-voltage electronic component installation slot; The relay and the fuse are arranged on one side of the insulating baffle, and the current sensor is arranged on the other side of the insulating baffle.

12. The battery pack according to claim 1, characterized in that: The battery module comprises a cell assembly, an upper pressing plate, a lower pressing plate, an insulating protective plate, a first side cover plate and a second side cover plate; wherein the cell assembly comprises a plurality of cells, and the plurality of cells are stacked together in sequence along a direction perpendicular to the large surface thereof; The upper pressing plate and the lower pressing plate are respectively installed at the top and bottom of the battery cell assembly along the height direction thereof, and the insulating protection plate is arranged between the upper pressing plate, the lower pressing plate and the battery cell assembly; the first side cover plate and the second side cover plate are both C-shaped, and are respectively installed on both sides of the battery cell assembly, the upper pressing plate and the lower pressing plate along the width direction thereof.

13. The battery pack according to claim 12, characterized in that: The first side cover plate is detachably connected to the upper pressing plate and the lower pressing plate via a fastening member; and / or The second side cover plate is detachably connected to the upper pressing plate and the lower pressing plate via a fastening member; and / or At least two positioning protrusions are formed on one side of the insulating protection plate close to the battery cell assembly and arranged at intervals along the width direction of the battery cell assembly.

14. The battery pack according to claim 12, characterized in that: The battery module further includes a first end plate, a second end plate, an upper end insulating member and a lower end insulating member; wherein the first end plate and the second end plate are respectively arranged at two ends of the battery cell assembly along the length direction thereof; The upper end insulating member is arranged between the inner side of the top end of the first end plate and the upper pressure plate, and the lower end insulating member is arranged between the inner side of the bottom end of the first end plate and the lower pressure plate; the upper end insulating member is arranged between the inner side of the top end of the second end plate and the upper pressure plate, and the lower end insulating member is arranged between the inner side of the bottom end of the second end plate and the lower pressure plate.

15. The battery pack according to claim 14, characterized in that: The upper end insulating member is detachably connected to the upper pressing plate and the first end plate via a fastening member; and / or The lower end insulating member is detachably connected to the lower pressing plate and the second end plate via a fastening member; and / or The upper end insulating member is L-shaped; a first avoidance notch is formed at one end of the upper pressing plate along its length direction, an upper bus is connected between the upper parts of two adjacent battery modules, and a portion of the upper bus extends into the L-shaped space of the upper end insulating member of one of the battery modules, and a portion of the upper bus extends into the L-shaped space of the upper end insulating member of another of the battery modules; and / or The lower end insulating member is L-shaped; a second avoidance gap is formed at one end of the lower pressure plate along its length direction, a lower bus is connected between the lower parts of two adjacent battery modules, and a portion of the lower bus extends into the L-shaped space of the lower end insulating member of one of the battery modules, and a portion of the lower bus extends into the L-shaped space of the lower end insulating member of another of the battery modules.

16. The battery pack according to any one of claims 1 to 15, characterized in that: The gaps in the battery module are filled with thermally conductive adhesive; and / or The reinforcing connecting member is a straight strip steel plate or a Z-shaped strip steel plate; and / or The preset direction is a horizontal direction.

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