Novel battery box

Abstract

The utility model discloses a novel battery box. The novel battery box comprises a lower box body, a CCS assembly and two battery packs, the lower box body comprises a water cooling plate, the battery packs are connected to the water cooling plate, the CCS assembly comprises an integral plastic uptake plate and a plurality of aluminum bars arranged on the integral plastic uptake plate, the battery packs are covered with the integral plastic uptake plate, the aluminum bars are arranged on the integral plastic uptake plate, and the aluminum bars are arranged on the integral plastic uptake plate. The battery cells of the battery packs are electrically connected through the aluminum bars, and the two battery packs are connected in series through the aluminum bars. According to the novel battery box provided by the invention, the battery packs share one CCS assembly, so that a series circuit is omitted, a plastic uptake plate is omitted, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a novel battery box. Background Art

[0002] In the prior art, a battery box usually includes a box body and multiple battery modules. The box body has a cavity, and each battery module is arranged in the cavity. Each battery module has multiple battery cells arranged in sequence and a CCS assembly covering the top of the battery cells. The CCS assemblies of each battery module need to be connected in series through copper bars to form a complete battery pack, which increases the copper bar material, and each battery module needs to be equipped with a CCS assembly separately, which is costly.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides a novel battery box.

[0005] In order to achieve the above utility model purpose, the present application provides a new battery box, including:

[0006] A lower box body, wherein the lower box body comprises a water cooling plate;

[0007] Two battery packs, each of which is connected to the water cooling plate;

[0008] The CCS assembly includes an integral blister plate and a plurality of aluminum bars arranged on the integral blister plate, wherein the integral blister plate covers each of the battery packs, and each of the aluminum bars is arranged on the integral blister plate, and each of the aluminum bars electrically connects the cells of each battery pack, and the aluminum bars connect two of the battery packs in series.

[0009] Optionally, the aluminum bar includes two aluminum bar groups and one jumper aluminum bar, the aluminum bars of one aluminum bar group electrically connect the battery cells of one battery pack, the aluminum bars on the other aluminum bar group electrically connect the battery cells of another battery pack, and the jumper aluminum bar connects the two battery packs.

[0010] Optionally, in the two battery packs, the battery cells at one end of one are connected to the first output socket, and the battery cells at the other end are connected to the jumper aluminum bar, and the battery cells at one end of the other are connected to the second output socket, and the battery cells at the other end are connected to the jumper aluminum bar.

[0011] Optionally, the new battery box includes a BMS module, which is electrically connected to each battery pack, and both of the two battery packs have end plates, and the BMS module is respectively connected to the end plates of the two battery packs.

[0012] Optionally, the BMS module includes a first BMS module and a second BMS module, the first BMS module and the second BMS module are both arranged on the two end plates, and the first BMS module and the second BMS module are respectively electrically connected to the two battery packs, the first BMS module is used to obtain voltage data of the battery cells, and the second BMS module is used to obtain temperature data of the battery cells.

[0013] Optionally, the novel battery box includes a bracket;

[0014] The brackets are respectively connected to the end plates of the two battery packs;

[0015] The first BMS module is connected to the end plates of the two battery packs respectively, and the second BMS module is connected to the bracket;

[0016] Optionally, the bracket includes a main board body and flanged plates arranged on both sides of the main board body, and the two flanged plates are respectively connected to the end plates of the two battery packs through fasteners;

[0017] There is a gap between the main plate and the end plate;

[0018] The first BMS module is located in the gap;

[0019] The second BMS module is connected to the main board body via fasteners.

[0020] Optionally, the flanging plate includes a fixing plate and a connecting plate;

[0021] The fixing plate is closely connected to the end plate;

[0022] The connecting plates are respectively connected to the main plate body and the fixing plate.

[0023] Optionally, the novel battery box includes an upper box body and a sealing plate;

[0024] The upper box is connected to the lower box, the upper box covers the battery pack and the CCS assembly, a maintenance window is provided on the upper box, the sealing plate is connected to the upper box, and the sealing plate covers the maintenance window, and the maintenance window faces the BMS module.

[0025] Optionally, the novel battery box includes a sealing ring, which is located between the sealing plate and the upper box body, and is used to close the gap between the upper box body and the sealing plate.

[0026] By adopting the above technical solution, the utility model has the following beneficial effects:

[0027] The battery packs of the new battery box provided in the present application share a CCS assembly, eliminating the need for a series circuit and a blister board, thereby significantly reducing costs.

[0028] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 It is a structural schematic diagram of a new battery box provided in an embodiment of the present application;

[0031] Figure 2 is an exploded view of a novel battery box provided in an embodiment of the present application;

[0032] Figure 3 It is a structural schematic diagram of the lower box body of the new battery box provided in an embodiment of the present application;

[0033] Figure 4 It is a structural schematic diagram of a new battery box provided in an embodiment of the present application, in which the battery pack and the CCS assembly are in a separated state;

[0034] Figure 5 It is a top view of the partial structure of the new battery box provided in the embodiment of the present application;

[0035] Figure 6 It is a schematic diagram of the internal structure of the new battery box provided in the embodiment of the present application.

[0036] In the figure, 1. lower box; 11. sheet metal base; 111. bent plate; 112. supporting beam; 12. water cooling plate; 2. battery pack; 3. upper box; 31. maintenance window; 4. sealing plate; 5. first BMS module; 6. second BMS module; 7. bracket; 71. main board; 72. flange plate; 8. combustible gas detector; 9. CCS assembly; 10. jumper aluminum bar; 20. aluminum bar.

[0037] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiment 1

[0042] See also Figures 1 to 6 As shown, the embodiment of the present application provides a new type of battery box, including: a lower box body 1, a CCS assembly 9 and two battery packs 2. The lower box body 1 includes a water-cooled plate 12, and each of the battery packs 2 is connected to the water-cooled plate 12. The CCS assembly 9 includes an integral blister plate and a plurality of aluminum bars 20 arranged on the integral blister plate. The integral blister plate covers each of the battery packs 2, and each of the aluminum bars 20 is arranged on the integral blister plate. Each of the aluminum bars 20 electrically connects the cells of each battery pack 2, and the aluminum bars 20 connect the two battery packs 2 in series. Each battery pack 2 of the new battery box provided by the present application shares a CCS assembly 9, eliminating the series circuit, eliminating a blister plate, and greatly reducing the cost.

[0043] In the traditional battery pack CTB solution, the CCS integration rate is generally not high. A single module has its own style of CCS assembly 9, resulting in inconsistent welding points, an increase in the number of laser machines occupied by CCS welding, and an increase in the cost of CCS assembly 9. In the embodiment of the present application, the stacking method of the battery cells of the two battery packs 2 is exactly the same. The CCS assembly 9 is welded on two battery packs 2 with the same stacking method, eliminating the series copper bus and a blister board, thereby greatly reducing costs. The CCS assembly 9 is welded on the welding table together with the standard box PACK, and the consistency of the welding effect is well guaranteed.

[0044] In some possible implementations, each aluminum bar 20 includes two aluminum bar groups and a jumper aluminum bar 10, each aluminum bar 20 of one aluminum bar group electrically connects each battery cell of one battery group 2, each aluminum bar 20 on another aluminum bar group electrically connects each battery cell of another battery group 2, and the jumper aluminum bar 10 connects two battery groups 2. In the embodiment of the present application, two battery groups 2 are connected in series through the jumper aluminum bar 10, which significantly reduces the cost compared with copper busbars.

[0045] Specifically, in the two battery packs 2, the battery cell at one end of one is connected to the first output socket, and the battery cell at the other end is connected to the jumper aluminum bar 10, and the battery cell at one end of the other is connected to the second output socket, and the battery cell at the other end is connected to the jumper aluminum bar 10. The two battery packs 2 are connected in series via the jumper aluminum bar 10.

[0046] In some possible implementations, the novel battery box includes a BMS module, which is electrically connected to each battery pack 2, and both of the two battery packs 2 have end plates, and the BMS module is respectively connected to the end plates of the two battery packs 2.

[0047] The BMS module includes a first BMS module 5 and a second BMS module 6, both of which are arranged on the two end plates, and the first BMS module 5 and the second BMS module 6 are respectively electrically connected to the two battery packs 2, the first BMS module 5 is used to obtain the voltage data of the battery cell, and the second BMS module 6 is used to obtain the temperature data of the battery cell.

[0048] The novel battery box includes a bracket 7 , which is respectively connected to the end plates of the two battery packs 2 , the first BMS module 5 is respectively connected to the end plates of the two battery packs 2 , and the second BMS module 6 is connected to the bracket 7 .

[0049] The bracket 7 includes a main body 71 and flange plates 72 disposed on both sides of the main body 71, and the two flange plates 72 are respectively connected to the end plates of the two battery packs 2 through fasteners. There is a gap between the main body 71 and the end plates, the first BMS module 5 is located in the gap, and the second BMS module 6 is connected to the main body 71 through fasteners.

[0050] In some possible implementations, the flange plate 72 includes a fixed plate and a connecting plate, the fixed plate is fittedly connected to the end plate, and the connecting plate is respectively connected to the main plate body 71 and the fixed plate.

[0051] The novel battery box includes an upper box body 3 and a sealing plate 4. The upper box body 3 is connected to the lower box body 1, and the upper box body 3 covers the battery pack 2 and the CCS assembly 9. A maintenance window 31 is set on the upper box body 3. The sealing plate 4 is connected to the upper box body 3, and the sealing plate 4 covers the maintenance window 31. The maintenance window 31 is opposite to the BMS module.

[0052] The novel battery box may further include a sealing ring, which is located between the sealing plate 4 and the upper box body 3 , and is used to close the gap between the upper box body 3 and the sealing plate 4 .

[0053] Embodiment 2

[0054] See also Figures 1 to 6 As shown, the embodiment of the present application describes the new battery box in detail, which includes: a lower box 1, a battery pack 2 and an upper box 3. The lower box 1 includes a sheet metal base 11 and a water cooling plate 12, the sheet metal base 11 is used for connection and fixing, the water cooling plate 12 is supported on the sheet metal base 11, the water cooling plate 12 is fixed to the sheet metal base 11 by fasteners, the battery pack 2 is attached to the water cooling plate 12, the upper box 3 is connected to the lower box 1, and the upper box 3 covers the battery pack 2.

[0055] The new battery box of the present application adopts a water-cooling plate 12, which has a low production cost. The water-cooling plate 12 is not welded to the side beams, but is locked on the sheet metal base 11 by fasteners. The two-in-one lower box body 1 of the new battery box is composed of a material cost much lower than that of the traditional welded lower box body 1, and the manufacturing process difficulty of the lower box body 1 is reduced, and the yield rate is high.

[0056] A mounting beam may be provided on the water cooling plate 12 , and the battery pack 2 may be fixed to the mounting beam by long bolts.

[0057] In some possible embodiments, the sheet metal base 11 has a bottom plate, a peripheral side plate and a bent plate 111, the peripheral side plate is connected to the edge of the bottom plate, the bent plate 111 is connected to the side of the peripheral side plate facing away from the bottom plate, the bent plate 111 is parallel to the bottom plate, the peripheral side plate is roughly perpendicular to the bottom plate, the water-cooled plate 12 is supported by the bent plate 111, and the water-cooled plate 12 is fixed to the bent plate 111 by fasteners.

[0058] In some possible implementations, a connection hole is provided on the bent plate 111, and the fastener includes a cap body and a rod body, the rod body passes through the water-cooling plate 12 and is connected to the connection hole, and the cap body is limited to the water-cooling plate 12. The fastener may be a flat head screw. For example, a plurality of rivet nuts may be provided on the bent plate 111, the rivet nuts have a connection hole, the connection hole is an internal threaded hole, and the fastener may be a screw, which passes through a through hole on the edge of the water-cooling plate 12 and is connected to the internal threaded hole.

[0059] The sheet metal base 11 is also provided with supporting beams 112, each supporting beam 112 is arranged in sequence and in parallel, the sheet metal base 11 is connected to the bottom plate and both ends are respectively connected to the surrounding side plates and / or the bent plate 111. The water-cooled plate 12 is supported on each supporting beam 112, and the supporting beam 112 is supported on the water-cooled plate 12 to prevent the water-cooled plate 12 from deformation.

[0060] In some possible implementations, the water-cooling plate 12 includes an upper aluminum plate and a lower aluminum plate, the upper aluminum plate and the lower aluminum plate are buckled together, and a liquid cooling medium channel is formed between the upper aluminum plate and the lower aluminum plate. The upper aluminum plate and the lower aluminum plate are both formed by stamping, which significantly reduces the cost.

[0061] In some possible embodiments, the new battery box includes a sealing plate 4, and a maintenance window 31 is provided on the upper box body 3, and the sealing plate 4 is detachably connected to the upper box body 3, and the sealing plate 4 covers the maintenance window 31. In this embodiment, a maintenance window 31 is provided on the upper box body 3, and the sealing plate 4 can be easily disassembled and maintained to repair the internal structure of the new battery box without removing the entire upper cover of the new battery box, thereby reducing safety hazards and improving maintenance efficiency. The new battery box may include a BMS module, which is located inside the new battery box and facing the maintenance window 31. When assembling the new battery box of the present application, the upper box body 3 and the lower box body 1 are first assembled, and then the copper bus and the BMS module are connected through the maintenance window 31, and a sealing ring is provided between the sealing plate 4 and the edge of the maintenance window 31, so that IP67 waterproof and dustproof can be achieved. When the BMS module is damaged, the sealing plate 4 can be directly opened to repair the BMS module without disassembling the numerous bolts of the upper box body 3, which significantly improves work efficiency. The maintenance window 31 ensures the sealing performance, realizes the rationality of the loading of the standard boxes and the sequence, and is convenient for maintaining the BMS.

[0062] In some possible implementations, a BMS module is provided on the battery pack 2, the upper box body 3 has a top plate and side plates located around the top plate, the side plates are connected to the lower box body 1, the maintenance window 31 is provided on the top plate, and the projection of the BMS module onto the top plate falls into the maintenance window 31. The BMS module can be exposed by removing the lower sealing plate 4, which facilitates the maintenance of the BMS module.

[0063] In some possible embodiments, the battery pack 2 includes a cell group and two end plates arranged at both ends of the cell group, and the BMS module includes a first BMS module 5 and a second BMS module 6, the first BMS module 5 and the second BMS module 6 are both arranged on the end plates, and the first BMS module 5 and the second BMS module 6 are both electrically connected to the cell group, the first BMS module 5 is used to obtain voltage data of the battery cell, and the second BMS module 6 is used to obtain temperature data of the battery cell.

[0064] The present application splits a common large-volume BMS module into two small BMS modules, thus fully saving space.

[0065] In some possible embodiments, the new battery box includes a bracket 7, the bracket 7 is connected to the end plate, the first BMS module 5 is connected to the end plate, the second BMS module 6 is connected to the bracket 7, and the first BMS module 5 and the second BMS module 6 are arranged in sequence along a direction perpendicular to the end plate.

[0066] The two BMS modules are arranged in sequence along the arrangement direction of each battery cell, or in other words, the two BMS modules are arranged in sequence along the thickness direction of the battery cell, which fully saves space.

[0067] In some possible implementations, the bracket 7 includes a main board body 71 and flange plates 72 disposed on both sides of the main board body 71, the two flange plates 72 are connected to the end plates, there is a gap between the main board body 71 and the end plates, the first BMS module 5 is located in the gap, and the second BMS module 6 is connected to the main board body 71 by fasteners. The provision of the bracket 7 facilitates the assembly of the first BMS module 5 and the second BMS module 6.

[0068] In some possible implementations, a combustible gas detector 8 and a temperature sensor are also provided on the main board 71. The combustible gas detector 8 can be used to detect combustible gases such as carbon monoxide. When the combustible gas detector 8 detects that the combustible gas reaches a certain level, it can control the execution of firefighting operations. For example, a fire hose is connected to the new battery box. When it is determined that the new battery box loses heat, the fire hose can be controlled to inject water into the new battery box to submerge the battery pack 2, thereby achieving the effect of cooling and extinguishing the fire.

[0069] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A new type of battery box, characterized in that: include: A lower box body, wherein the lower box body comprises a water cooling plate; Two battery packs, each of which is connected to the water cooling plate; The CCS assembly includes an integral blister plate and a plurality of aluminum bars arranged on the integral blister plate, wherein the integral blister plate covers each of the battery packs, and each of the aluminum bars is arranged on the integral blister plate, and each of the aluminum bars electrically connects the cells of each battery pack, and the aluminum bars connect two of the battery packs in series.

2. The new battery box according to claim 1 is characterized in that: The aluminum bar includes two aluminum bar groups and a jumper aluminum bar. The aluminum bars of one aluminum bar group electrically connect the battery cells of one battery pack, and the aluminum bars on the other aluminum bar group electrically connect the battery cells of another battery pack. The jumper aluminum bar connects the two battery packs.

3. The new battery box according to claim 2 is characterized in that: In the two battery packs, the battery cell at one end of one is connected to the first output socket, and the battery cell at the other end is connected to the jumper aluminum bar, and the battery cell at one end of the other is connected to the second output socket, and the battery cell at the other end is connected to the jumper aluminum bar.

4. The new battery box according to claim 1 is characterized in that: It comprises a BMS module, wherein the BMS module is electrically connected to each battery pack, and the two battery packs each have an end plate, and the BMS module is respectively connected to the end plates of the two battery packs.

5. The new battery box according to claim 4 is characterized in that: The BMS module includes a first BMS module and a second BMS module, the first BMS module and the second BMS module are both arranged on the two end plates, and the first BMS module and the second BMS module are respectively electrically connected to the two battery packs, the first BMS module is used to obtain voltage data of the battery cells, and the second BMS module is used to obtain temperature data of the battery cells.

6. The new battery box according to claim 5 is characterized in that: Including bracket; The brackets are respectively connected to the end plates of the two battery packs; The first BMS modules are respectively connected to the end plates of the two battery packs, and the second BMS module is connected to the bracket.

7. The new battery box according to claim 6 is characterized in that: The bracket includes a main board body and flanged plates arranged on both sides of the main board body, and the two flanged plates are respectively connected to the end plates of the two battery packs through fasteners; There is a gap between the main plate and the end plate; The first BMS module is located in the gap; The second BMS module is connected to the main board body via fasteners.

8. The new battery box according to claim 7 is characterized in that: The flanging plate includes a fixing plate and a connecting plate; The fixing plate is closely connected to the end plate; The connecting plates are respectively connected to the main plate body and the fixing plate.

9. The new battery box according to any one of claims 4 to 8, characterized in that: It includes an upper box body and a sealing plate; The upper box is connected to the lower box, the upper box covers the battery pack and the CCS assembly, a maintenance window is arranged on the upper box, the sealing plate is connected to the upper box, and the sealing plate covers the maintenance window, and the maintenance window faces the BMS module.

10. The new battery box according to claim 9 is characterized in that: A sealing ring is included, and the sealing ring is located between the sealing plate and the upper box body, and the sealing ring is used to close the gap between the upper box body and the sealing plate.

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