Novel battery pack and battery system

Abstract

The utility model discloses a novel battery pack and a battery system. The novel battery pack comprises a box body, a battery box cover, a battery module and a buffer component, a battery module is placed in the box main body; a battery box cover is arranged at the top of the box body; reinforcing rib plates are arranged on the inner walls of the left and right sides of the box body. The battery module comprises two battery cell combinations; a first insulating sheet is arranged between the two battery cell combinations; each battery cell combination comprises a plurality of single battery cells, and foam is arranged between any two adjacent single battery cells; a fiber adhesive tape is wound on the peripheral side wall of the battery module main body; after the fiber adhesive tape is wound on the battery module main body, second insulating sheets are respectively adhered to the peripheral side surfaces of the battery module main body; and the buffer component is arranged among the battery module, the box body and the battery box cover. According to the utility model, the expansion of the battery cell can be inhibited, the heat dissipation of the battery is effectively promoted, the serious expansion problem of the battery pack box body is avoided, the battery is prevented from being in a high-temperature working environment, and the service life of the battery pack is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a new type of battery pack and battery system, which are applied to the battery pack and battery system on an AGV (Automated Guided Vehicle). Background Art

[0002] In modern industry, AGVs (Automated Guided Vehicles) are increasingly widely used. Through automatic navigation and intelligent control systems, they have optimized multiple links such as material handling, production line automation, and warehouse management. The application of AGVs in modern industry not only improves production efficiency and quality but also reduces the operating costs of enterprises.

[0003] At present, users have higher and higher requirements for the endurance, charging rate, safety, lifespan, etc. of AGV products on the market. And because AGV products are often relatively flat and have a low overall height, the batteries used in AGVs generally have high requirements for size and need a high energy density.

[0004] When designing many existing AGV battery pack products, in order to meet the requirement of arranging more power in a narrow space, the consideration of product heat dissipation performance and structural strength is abandoned. It is unable to suppress the expansion of the battery cells and unable to promote battery heat dissipation, which easily causes serious expansion problems in the battery pack box after a period of use. And the battery is in a high-temperature working environment for a long time, seriously affecting the service life of the battery pack.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a new type of battery pack and battery system for the technical defects existing in the prior art.

[0007] To this end, the utility model provides a new type of battery pack, which includes a box body main body, a battery box cover, a battery module, and a buffer component;

[0008] The box body main body is a box with an open top;

[0009] Inside the box body main body, it is used to place the battery module;

[0010] On the top of the box body main body, a battery box cover is fixedly arranged;

[0011] On the inner walls of the left and right sides of the box body main body, a reinforcing rib plate is respectively fixedly arranged;

[0012] On the opposite sides of the two reinforcing rib plates, a plurality of longitudinally distributed and parallel reinforcing ribs are respectively protruding;

[0013] The two reinforcing rib plates are symmetrically distributed left and right;

[0014] The battery module includes two cell combinations distributed left and right;

[0015] A first insulating sheet distributed longitudinally is provided between the two cell combinations;

[0016] Each cell combination includes a plurality of single cells arranged longitudinally and parallel to each other, and an elastic foam is provided at the upper and lower ends of the opposite sides of any two adjacent single cells;

[0017] Around the four side walls of the battery module body composed of two cell combinations, fiber tapes are respectively wound around the upper and lower ends;

[0018] After the fiber tapes are wound around the battery module body composed of two cell combinations, a second insulating sheet distributed vertically is adhered to each of the four side surfaces;

[0019] The buffer component includes a side buffer foam, a bottom heat-conducting pad, and a top limiting foam;

[0020] The side buffer foam is located at the position between the rear side of the battery module and the rear panel of the box body;

[0021] The bottom heat-conducting pad is located at the position between the bottom of the battery module and the bottom plate of the box body;

[0022] The top limiting foam is located at the position between the top of the battery module and the battery box cover;

[0023] The top limiting foam is adhered to the bottom surface of the battery box cover.

[0024] In addition, the present utility model also provides a battery system, including at least one new battery pack as described above.

[0025] As can be seen from the technical solutions provided by the present utility model above, compared with the prior art, the present utility model provides a new battery pack and a battery system, the structural design of which is scientific, which can inhibit the expansion of the cells and effectively promote the heat dissipation of the battery, effectively avoid the serious expansion problem of the battery pack box body, and avoid the battery being in a high-temperature working environment, ensuring the service life of the battery pack, and having great practical significance in production.

[0026] In addition, the battery pack of the present utility model is a special lithium battery pack for an AGV handling trolley, which integrates the module end plate onto the box body, enabling the box body to serve both as a housing and an end plate, and can ensure the limitation of the expansion force of the battery module by the battery box on the premise of ensuring a relatively high utilization rate of the internal space of the product, and avoid the problem of serious expansion of the battery box body.

[0027] In addition, through the heat dissipation design of adding a heat conduction pad between the battery cell and the housing, the present utility model ensures that during the discharge process of the battery, the heat in the battery box can be transferred out in time through the housing, avoiding the battery being in a high-temperature environment for a long time.

[0028] The novel battery pack of the present utility model can improve the product performance and safety in multiple aspects, greatly extend the service life of the battery pack, and reduce the cost of replacing the battery in the later stage of the product.

[0029] The product of the present utility model is applied to AGV vehicles, and has the advantages of safety, reliability, and high space utilization rate, which can meet the current high requirements for space and cost of lithium batteries used in AGV vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic assembly structure diagram of a novel battery pack provided by the present utility model;

[0031] Figure 2 It is a three-dimensional exploded view structure diagram of a novel battery pack provided by the present utility model;

[0032] Figure 3 It is a three-dimensional structure diagram of the main body of the box when viewed from the rear to the front in a novel battery pack provided by the present utility model;

[0033] Figure 4 It is a three-dimensional structure diagram of the battery box cover in a novel battery pack provided by the present utility model;

[0034] Figure 5 It is a structure diagram of the electrical components in a novel battery pack provided by the present utility model;

[0035] Figure 6 It is a structure diagram of the buffer components in a novel battery pack provided by the present utility model;

[0036] Figure 7 It is a three-dimensional exploded view structure diagram of the battery module in a novel battery pack provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model.

[0039] In the description of this patent, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "set" shall be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise clearly and specifically defined.

[0041] See Figures 1 to 7 , the present utility model provides a new type of battery pack, which includes a box body main body 1 and a battery box cover 4;

[0042] The box body main body 1 is a box body with an open top;

[0043] Inside the box body main body 1, it is used to place the battery module 2;

[0044] On the top of the box body main body 1, the battery box cover 4 is fixedly arranged;

[0045] On the inner walls of the left and right sides of the box body main body 1, a reinforcing rib plate 103 is respectively and fixedly arranged;

[0046] On the opposite sides of the two reinforcing rib plates 103, a plurality of longitudinally distributed and parallel reinforcing ribs 1030 are respectively and prominently arranged;

[0047] The two reinforcing rib plates 103 are symmetrically distributed left and right.

[0048] In the present utility model, specifically in implementation, the shape of the reinforcing rib 1030 is a "ji" shape or a "kan" shape.

[0049] In the present utility model, specifically in implementation, the reinforcing rib 1030 is obtained by bending the reinforcing rib plate 103.

[0050] It should be noted that for the present utility model, through the U-shaped sheet metal reinforcing rib, on the one hand, it can increase the structural strength of the box body and prevent the box body from deforming. On the other hand, this reinforcing rib also contacts the outermost second insulating sheet 205 (i.e., PC insulating sheet) of the battery module 2 placed in the battery box, which can inhibit the expansion force of the battery cell during charging and discharging, prevent the battery cell from over-expanding, and thus increase the cycle life of the battery cell.

[0051] It should be noted that for the present utility model, since two reinforcing rib plates 103 are welded to the inner walls on both sides of the box body main body 1, by contacting the reinforcing rib with the battery module 2, it can inhibit the over-expansion of the battery cells in the module, prevent the box body from deforming or being damaged, and can play a role in increasing the number of cycles of the battery pack.

[0052] In the present utility model, specifically in implementation, the overall shape of the box body main body 1 is a cuboid.

[0053] Specifically in implementation, the box body main body 1 is a hollow sheet metal part formed by bending and welding cold-rolled steel.

[0054] In the present utility model, specifically in implementation, as shown in Figure 4 the battery box cover 4 is fixedly connected to the box body main body 1 through a plurality of first screws;

[0055] At the bottom around the battery box cover 4, a downward flanging is provided in a surrounding manner;

[0056] The top of the surrounding side surfaces of the box body main body 1 is located inside the downward flanging of the battery box cover 4;

[0057] Specifically in implementation, a plurality of first through holes are evenly distributed at the top of the surrounding side surfaces of the box body main body 1;

[0058] A first nut 102 is fixedly welded on each first through hole;

[0059] At the position corresponding to each nut 102 of the box body main body 1 on the downward flanging of the battery box cover 4, a countersunk screw through hole 401 (specifically an M4 countersunk hole) is respectively provided;

[0060] After the first screw passes through the countersunk screw through hole 401, it is threadedly fixedly connected to the corresponding first nut 102.

[0061] It should be noted that the battery box cover 4 can be locked to the box body main body 1 through a plurality of M4 screws to form an integral body and form a seal, and the overall protection level can reach IP55.

[0062] It should be noted that the battery box cover 4 is used to seal the top opening of the box body, prevent external water droplets, foreign objects, etc. from entering the interior of the battery box, and form an interference fit by squeezing the top foam block (i.e., the top limiting foam 503) above the battery module 2 in the axial direction (i.e., the vertical direction) to press the battery module tightly.

[0063] Specifically, at the top of the rib 1030 located at the uppermost position of the ribbed plate 103, a plurality of second through holes 1031 are arranged longitudinally and at equal intervals;

[0064] The second through holes 1031 are connected to the sampling wire harness through cable ties.

[0065] Furthermore, the diameter of the second through holes 1031 is a through hole with a diameter of 6.3 mm. The sampling wire harness can be fixed to this rib with pin-type cable ties to prevent wear caused by the free movement of the sampling wire harness during operation.

[0066] In the present utility model, specifically, at the bottom of the box body 1, two L-shaped brackets 104 are welded;

[0067] The two brackets 104 are symmetrically distributed front and back;

[0068] Specifically, the rear side surface of the bracket 104 located at the rear is welded to the front side surface of the rear panel of the box body 1.

[0069] Specifically, the projections of the two ribbed plates 103 at the bottom of the box body 1 are located at the position between the two brackets 104.

[0070] Specifically, between the two ribbed plates 103, the two brackets 104 and the rear panel of the box body 1, a receiving cavity for placing the battery module 2 is formed.

[0071] It should be noted that the size of the receiving cavity for placing the battery module is slightly larger than the thickness size of the battery module to be placed. For example, both the length and width are greater than 0.5 mm, which can limit the battery module in the thickness direction and prevent the module from shaking back and forth in the box.

[0072] Specifically, the charge and discharge interface 1001 and the communication interface 1002 of the box body 1 are located on the front side panel of the main box body 1, and the name of each interface can be silk-screened with ink thereon to prevent misconnection.

[0073] Specifically, cable tie buckles 105 are respectively welded on the upper surface of the bottom panel and the rear side of the front panel of the box body 1.

[0074] It should be noted that the overall body of the box body 1 is a cuboid shell with an open top for installing materials such as battery modules and wiring harnesses. The four side faces and the bottom face of its periphery are bent from cold-rolled steel with a thickness of 1.5 mm, and the joints of each face are fully welded by resistance welding to ensure airtightness and the structural strength of the box body. At the positions on the bottom face where the battery modules are installed, two L-shaped brackets 104 are welded. The protruding height of this bracket 104 is about 20 mm. On the premise of ensuring reliable positioning, it is as convenient as possible for the installation of the battery modules. At the same time, wire tie holders 105 are also welded on the upper surface of the bottom panel and the rear side of the front panel of the box body 1 to ensure that the wiring harness can be fixed in the box without shaking and causing wear and breakage of the skin. Finally, four M3 studs 106 are welded on the rear side of the front panel of the box body 1 for installing the battery protection board 304, and are at a relatively far distance from the box body and the battery module to ensure no electromagnetic interference.

[0075] Specifically, the battery box cover 4 is a sheet metal part formed by bending and welding cold-rolled steel with a thickness of 1.5 mm.

[0076] Specifically, at the middle position of the top of the battery box cover 4, a handle 402 is provided.

[0077] Furthermore, the handle 402 is a stainless steel handle.

[0078] Furthermore, one end of the handle 402 is fixedly connected to the top of the battery box cover 4.

[0079] Furthermore, a handle mounting seat 4020 is fixedly provided on the top of the battery box cover 4.

[0080] At the four corner positions of the handle mounting seat 4020, there is respectively a third through hole.

[0081] At the positions corresponding to each third through hole on the battery box cover 4, there is respectively a fourth through hole.

[0082] At the bottom of each fourth through hole, a fourth nut is welded.

[0083] The handle mounting seat 4020 is fixedly connected to the battery box cover 4 through a fourth screw 403.

[0084] After the fourth screw 403 passes through the corresponding third through hole and fourth through hole in sequence, it is threadedly fixedly connected to the fourth nut.

[0085] It should be noted that the fourth nut can be a nut of M4 specification. The handle is locked on the battery box cover with a fourth screw 403 of M4 specification, which is convenient for carrying and moving the battery box. The handle 402 is arranged on the handle mounting seat 4020, and the handle mounting seat 4020 has through holes distributed longitudinally, and these through holes are used for the pull ring on one side of the handle 402 to longitudinally penetrate through.

[0086] It should be noted that the pull ring on the other side of the handle 402 without a limit can move freely by 180 degrees, and the user can easily lift it. At the same time, after installing the battery pack in the battery compartment of the AGV cart, the user can also choose to remove the handle 402, so as to reduce the overall height of the product and provide more space for the structural design of the whole vehicle.

[0087] In the present utility model, specifically in implementation, refer to Figure 7 As shown, the battery module 2 includes two cell combinations distributed left and right;

[0088] A first insulating sheet 203 distributed longitudinally is provided between the two cell combinations;

[0089] Each cell combination includes a plurality of single cells 201 arranged longitudinally and parallel to each other. One elastic foam 202 is provided at the upper and lower ends of the opposite sides of any two adjacent single cells 201;

[0090] Around the upper and lower ends of the side walls of the battery module main body composed of two cell combinations, fiber tapes 204 are respectively wound;

[0091] Specifically in implementation, after the battery module main body composed of two cell combinations is wound with the fiber tape 204, a vertically distributed second insulating sheet 205 is adhered to each of its side surfaces.

[0092] Specifically in implementation, both the first insulating sheet 203 and the second insulating sheet 205 are polycarbonate PC insulating sheets, and the foam 202 is a polyurethane PU foam.

[0093] Specifically in implementation, the front and rear sides of the foam 202 are adhered to the opposite sides of the two single cells 201.

[0094] Specifically in implementation, the thickness of the foam 202 is 1.5 mm;

[0095] The thickness of the first insulating sheet 203 is 0.5 mm;

[0096] The thickness of the fiber tape 204 is 0.1 mm;

[0097] It should be noted that by winding two layers of fiber tape 204, all the cells are bundled together to form a whole, and second insulating sheets 205 with a thickness of 0.5 mm are adhered to the four side surfaces to form insulation protection.

[0098] Specifically in implementation, a welding insulating sheet 207 (specifically a polycarbonate PC insulating sheet) is provided on the top of the battery module main body composed of two cell combinations;

[0099] Openings are respectively provided in the welding insulating sheet 207 at positions corresponding to the positive electrode posts, negative electrode posts and pressure relief valves on each single cell 201.

[0100] It should be noted that for this utility model, a plurality of busbars 206 and two positive and negative lead-out buses 208 are sequentially pasted on the welding insulating sheet 207, and the assembled component after pasting is placed entirely on the pole surface of the battery cell combination. After a plurality of busbars and two positive and negative lead-out buses 208 are welded to the poles of the single battery cells, a complete battery module 2 is formed. By connecting power lines at the positive and negative lead-out buses 208 of the battery module 2, it can discharge electricity outward, for example, provided for use by an AGV cart.

[0101] Specifically, as shown in Figure 7 As shown, the battery module 2 is an aggregate of a plurality of single battery cells 201. The single battery cells are arranged according to the corresponding polarities according to the direction of the series current. The overall battery cells have two columns, each column contains 8 single battery cells, and two double-sided adhesive elastic foams 202 are pasted between two single battery cells in each column; on the one hand, the foam 202 can bond the single battery cells together to prevent the battery cells from spreading during the transfer process before welding, and on the other hand, it can form a certain gap between two single battery cells to leave a certain expansion space for the single battery cells;

[0102] It should be noted that a first insulating sheet 203 with a thickness of 0.5 mm is pasted between the two columns of battery cells (i.e., two battery cell combinations), which can prevent the adjacent surfaces of the two columns of battery cells from causing damage to the insulating film on the surface of the battery cells due to mutual friction, thereby causing a short circuit of the battery cells;

[0103] It should be noted that the periphery of the battery module body composed of two battery cell combinations is wrapped with a fiber tape 204 with a thickness of 0.1 mm. This tape has good adhesiveness and high tensile strength, which can make the battery cells form a whole and prevent them from falling apart during the transfer process; and since the battery module is directly in contact with the inner wall of the box body main body, in order to avoid a short circuit between the single battery cells in the battery module and the box body bracket, a second insulating sheet 205 with a thickness of 0.5 mm is pasted on the periphery of the battery module. Finally, a welding insulating sheet 207 is pasted on the pole surface of the single battery cell. A plurality of series busbars of the single battery cells are sequentially pasted on this insulating sheet. This insulating sheet has double-sided adhesive and can tightly adhere the busbars to prevent the busbars from being misaligned and avoid affecting subsequent laser welding.

[0104] In this utility model, specifically, as shown in Figure 5 As shown, the new battery pack further includes an electrical component 3;

[0105] The electrical component 3 includes a sampling wire harness 301, a communication wire harness 302, a positive power wire harness 3031, a negative power wire harness 3032, and a battery protection board 304;

[0106] One end of the sampling wire harness 301 is used to connect to the poles of a plurality of single battery cells 201 in the battery module 2;

[0107] The other end of the sampling wire harness 301 is connected to the information acquisition end of the battery protection board 304;

[0108] The information output end of the battery protection board 304 is connected to an external information receiving terminal through the communication wire harness 302.

[0109] It should be noted that the sampling wire harness 301 is divided into multiple small wires and connected to the electrode posts of each single cell 201, and the real-time voltage of each single cell can be recorded and fed back to the battery protection board 304. The battery protection board 304 transmits this information to the background (such as an external information receiving terminal like a display terminal) through the communication wire harness 302 for the user to view, which is convenient for real-time detection of the product status and early discovery of abnormal cell conditions;

[0110] It should be noted that the battery protection board is an integrated circuit board that protects rechargeable batteries (usually lithium batteries). For example, the battery protection board that can be used in the present utility model can be the protection board with the model ANT24S-50A produced by Shiyan Ant Internet of Things Technology Co., Ltd. Its main functions include: single-cell voltage detection, temperature detection, high-voltage detection, battery balancing, CAN / 485 / TTL / GPRS communication, Bluetooth (mobile phone APP), sleep wake-up, etc. It is a mature and widely used conventional module in the prior art, and its structure and functions will not be elaborated here.

[0111] In specific implementation, one end of each of the two power wire harnesses, namely the positive power wire harness 3031 and the negative power wire harness 3032, is respectively connected to the positive output end and the negative output end of the battery module, specifically corresponding to and connected to two positive and negative lead-out rows 208 (one is the positive lead-out row and the other is the negative lead-out row) in the battery module 2;

[0112] The other end of the positive power wire harness 3031 is connected to the positive terminal of the AGV cart (or other electrical equipment) through the battery protection board 304. Specifically: the other end of the positive power wire harness 3031 is first connected to the battery protection board 304, and then connected to the positive terminal of the AGV cart (or other electrical equipment) through the battery protection board 304;

[0113] The other end of the negative power wire harness 3032 is directly led out to the outside of the box body main body 1 for connection to the negative terminal of electrical equipment such as the AGV cart; among them, the battery protection board 304 can realize the on-off control of the system by controlling the positive electrode circuit and provide power to electrical equipment such as the AGV cart according to the requirements of the electrical equipment.

[0114] In specific implementation, the battery protection board 304 is connected to the power consumption end (specifically the positive terminal) of the AGV cart (or other electrical equipment) through the power output wire harness 306;

[0115] Specifically, gland connectors 305 are installed on the communication wire harness 302 and the power output wire harness 306 respectively, and are locked on the communication interface 1002 and the charge and discharge interface 1001 on the front panel of the box body main body 1 through the gland connectors 305. The gland connectors 305 can define the wire length and isolate the wire outlet from the outside world to prevent foreign objects from entering the box.

[0116] It should be noted that the electrical component 3 enables the battery to be connected to an electrical appliance (such as an AGV cart) and protects the battery cells to work under suitable working conditions. The electrical component is composed of multiple wire harnesses and a protection board, which conducts electrical signals, monitors each battery cell at any time, and transmits data to the background.

[0117] The electrical component 3 fixes the wires led out from the inside of the box body through the gland connectors 305, so that the length of the led-out wires meets the requirements of the user, and isolates foreign objects from entering the inside of the box body through the wire outlet. The two ends of the communication wire harness 302 and the power output wire harness 306 can be respectively crimped with connectors of specific models, which can be connected to the AGV vehicle body for convenient use and charging of the product.

[0118] In the present utility model, specifically, refer to Figure 6 As shown, the new battery pack further includes a buffer component 5; the buffer component is arranged at the positions between the battery module and the box body main body and the battery box cover.

[0119] The buffer component 5 includes a side buffer foam 501, a bottom heat-conducting pad 502, and a top limiting foam 503.

[0120] The side buffer foam 501 is located at the position between the rear side of the battery module 2 and the rear panel of the box body main body 1.

[0121] The bottom heat-conducting pad 502 is located at the position between the bottom of the battery module 2 and the bottom plate of the box body main body 1.

[0122] The top limiting foam 503 is located at the position between the top of the battery module 2 and the battery box cover 4.

[0123] The top limiting foam 503 is adhesively bonded to the bottom surface of the battery box cover 4.

[0124] Specifically, the overall thickness of the top limiting foam 503 is greater than the gap distance between the bottom surface of the battery box cover 4 and the top of the battery module 2.

[0125] It should be noted that the buffer component 5 is an assembly, specifically including a 10-mm side buffer foam 501. This foam isolates the battery module 2 from the side wall of the box body 1. When the product is externally collided on this side, the side buffer foam 501 can absorb most of the impact force, preventing the box wall from deforming and piercing the battery module 2, greatly improving the safety performance of the product.

[0126] In terms of specific implementation, the buffer component 5 includes a 0.5-mm thick bottom heat-conducting pad 502, which is located between the bottom of the battery module 2 and the bottom of the box body 1. The preparation material of the bottom heat-conducting pad 502 is a mixture of heat-conducting silica gel and alumina, having a relatively large heat-conductivity coefficient. The box body 1 is made of cold-rolled steel plate, and the cold-rolled steel plate has good heat-conducting performance. Under the gravity of the battery module 2, one side of this heat-conducting pad is completely attached to the bottom of the box body 1, and the other side is completely attached to the bottom of the battery module's battery cells, playing the role of quickly transferring heat to the outside through the box body 1 and the bottom heat-conducting pad 502, ensuring that the heat energy generated when the battery is working is dissipated faster. At the same time, it can also play the role of insulation protection, preventing the bottom of the box body 1 from piercing the battery cells and causing a short circuit.

[0127] It should be noted that the buffer component 5 includes a 10-mm top limiting foam 503, which is pasted on the battery box cover 4. The overall thickness of the top limiting foam 503 is slightly larger than the gap distance between the battery box cover 4 and the top of the battery module 2. When the battery box cover 4 is locked to the box body 1 with screws, this foam will be compressed by a certain size. At this time, the battery module is restricted in the up-and-down direction (i.e., the vertical direction) and cannot jump freely.

[0128] Therefore, since the buffer component 5 includes side limiting foam, top limiting foam, bottom heat-conducting pad, etc., the foam can isolate the contact between the battery module 2 and the metal box body, prevent short circuit after collision, and play a role in limiting the battery module 2. The heat-conducting pad can accelerate the heat exchange rate between the inside and outside of the battery box, assist in cooling, and prevent the battery from decaying in life at high temperatures. In addition, the buffer component 5 can effectively separate the charged parts such as the battery cells and busbars in the battery module 2 from the conductive components such as the box body, ensuring electrical safety.

[0129] Based on the new battery pack provided by the above-mentioned present invention, the present invention also provides a battery system, including at least one new battery pack as described above.

[0130] In terms of specific implementation, when the battery system includes multiple new battery packs, the multiple new battery packs are connected in parallel, in series, or in series-parallel.

[0131] In terms of specific implementation, inside the new battery pack, multiple battery cell monomers are provided.

[0132] Multiple battery cells are connected in parallel, in series, or in a series-parallel combination.

[0133] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A new type of battery pack, characterized in that: It includes a box body main body (1), a battery box cover (4), a battery module (2), and a buffer component (5); The box body main body (1) is a box with an open top; Inside the box body main body (1), it is used to place the battery module (2); On the top of the box body main body (1), the battery box cover (4) is fixedly arranged; On the inner walls of the left and right sides of the box body main body (1), a reinforcing rib plate (103) is respectively fixedly arranged; On the opposite sides of the two reinforcing rib plates (103), a plurality of longitudinally distributed and parallel reinforcing ribs (1030) are respectively protruding; The two reinforcing rib plates (103) are symmetrically distributed left and right; The battery module (2) includes two cell combinations distributed left and right; A first insulating sheet (203) distributed longitudinally is arranged between the two cell combinations; Each cell combination includes a plurality of single cells (201) arranged longitudinally and in parallel, and on the upper and lower ends of the opposite sides of any two adjacent single cells (201), an elastic foam (202) is respectively arranged; Around the upper and lower ends of the four side walls of the battery module main body composed of two cell combinations, a fiber tape (204) is respectively wound; After the fiber tape (204) is wound on the battery module main body composed of two cell combinations, a vertically distributed second insulating sheet (205) is respectively adhered to its four side surfaces; The buffer component (5) includes a side buffer foam (501), a bottom heat-conducting pad (502), and a top limiting foam (503); The side buffer foam (501) is located at the position between the rear side of the battery module (2) and the rear panel of the box body main body (1); The bottom heat-conducting pad (502) is located at the position between the bottom of the battery module (2) and the bottom plate of the box body main body (1); The top limiting foam (503) is located at the position between the top of the battery module (2) and the battery box cover (4); The top limiting foam (503) is adhered to the bottom surface of the battery box cover (4).

2. The novel battery pack according to claim 1, characterized in that: The shape of the reinforcing rib (1030) is "C" shape or "U" shape.

3. The novel battery pack according to claim 1, characterized in that: The battery box cover (4) is fixedly connected to the box body main body (1) through a plurality of first screws; Around the bottom of the battery box cover (4), a downward flange is arranged in a surrounding manner; On the top of the four side surfaces of the box body main body (1), it is located inside the downward flange of the battery box cover (4); 4. The novel battery pack as claimed in claim 3, characterized in that: On the top of the four side surfaces of the box body main body (1), a plurality of first through holes are evenly distributed; A first nut (102) is welded and fixed on each first through hole; At the position corresponding to each nut (102) of the box body main body (1) on the downward flange of the battery box cover (4), a countersunk head screw through hole (401) is respectively arranged; After the first screw passes through the countersunk head screw through hole (401), it is threadedly fixedly connected to the corresponding first nut (102).

5. The novel battery pack as claimed in claim 1, characterized in that: On the top of the reinforcing rib (1030) at the uppermost position of the reinforcing rib plate (103), a plurality of second through holes (1031) distributed longitudinally and arranged at equal intervals are arranged; The second through holes (1031) are connected to the sampling wire harness through cable ties.

6. The novel battery pack as claimed in claim 1, characterized in that: At the bottom of the box body main body (1), two L-shaped brackets (104) are welded; The two brackets (104) are symmetrically distributed front and back; The rear side surface of the bracket (104) located at the rear is welded to the front side surface of the rear panel of the box body (1); A receiving cavity for accommodating the battery module (2) is formed between the two reinforcing rib plates (103), the two brackets (104) and the rear panel of the box body (1).

7. The novel battery pack as claimed in claim 6, characterized in that: The projections of the two reinforcing rib plates (103) on the bottom of the box body (1) are located between the two brackets (104).

8. The novel battery pack according to any one of claims 1 to 7, characterized in that: The upper surface of the bottom panel and the rear side of the front panel of the box body (1) are also respectively welded with wire ties (105); and / or, A handle (402) is provided at the middle of the top of the battery box cover (4); and / or, A welding insulating sheet (207) is provided on the top of the battery module body composed of two battery cells; and / or, The front and rear sides of the foam (202) are bonded to the opposite sides of the two single battery cells (201); and / or, The overall thickness of the top limiting foam (503) is greater than the gap distance between the bottom surface of the battery box cover (4) and the top of the battery module (2).

9. The novel battery pack according to any one of claims 1 to 7, characterized in that: Also included is an electrical component (3); An electrical assembly (3), comprising a sampling harness (301), a communication harness (302), a positive power harness (3031), a negative power harness (3032) and a battery protection board (304); One end of the sampling harness (301) is used to connect to poles of a plurality of single cells (201) in the battery module (2); The other end of the sampling harness (301) is connected to the information collection end of the battery protection board (304); The information output end of the battery protection board (304) is connected to an external information receiving terminal via a communication harness (302); One end of the two power harnesses, the positive power harness (3031) and the negative power harness (3032), are respectively connected to the positive output terminal and the negative output terminal of the battery module; The other end of the positive power harness (3031) is connected to the positive terminal of the electrical equipment through the battery protection board (304); The other end of the negative power harness (3032) is led out to the outside of the box body (1) for connection with the negative terminal of the electrical equipment.

10. A battery system, characterized in that: The invention comprises at least one novel battery pack according to any one of claims 1 to 9.

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