Cabin-divided type soft-package battery cell low-voltage battery box

Abstract

The utility model discloses a compartment type soft-package battery cell low-voltage battery box. The compartment type soft-package battery cell low-voltage battery box comprises a shell; the inner steel shell is arranged in the outer shell, a plurality of bin dividing transverse partition plates extending in the first direction and a plurality of bin dividing vertical partition plates extending in the second direction are arranged in the inner steel shell, and the bin dividing transverse partition plates and the bin dividing vertical partition plates are matched to divide the inner steel shell into a plurality of bin dividing parts; the first direction is intersected with the second direction; the battery module comprises a plurality of soft package battery cells which are independently arranged, and the soft package battery cells are arranged in the branch bins in a one-to-one correspondence manner; and a plurality of reinforcing ribs are arranged on the inner side of the upper cover. According to the invention, the impact of vehicle vibration on the battery cell in the vehicle driving process is reduced.

Description

Technical Field

[0001] This application relates to the field of batteries, and particularly to a low-voltage battery box with a compartmentalized soft-pack battery cell. Background Art

[0002] The parking start low-voltage battery box, as an important component in new energy vehicles, is mainly responsible for providing power support for vehicle starting and low-voltage electronic devices. Currently, the low-voltage battery boxes on the market generally use traditional large square-shell battery cells and rely on brackets for fixation. However, when supplying power to vehicles such as vans, light trucks, medium trucks, and heavy trucks, there are at least the following obvious deficiencies: The seismic resistance is limited. Due to the large volume and rigid structure of the large square-shell battery cells, it is difficult to effectively absorb and resist external vibrations during vehicle driving, especially on uneven roads or during sharp turns, resulting in easy damage to the internal components of the battery and affecting the overall performance and reliability. The above content is only used to assist in understanding the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0003] The main purpose of this application is to provide a low-voltage battery box with a compartmentalized soft-pack battery cell, aiming to solve the problem that the existing parking start low-voltage battery boxes generally use large square-shell battery cells and it is difficult to effectively absorb and resist external vibrations when the vehicle is driving on uneven roads or during sharp turns.

[0004] To achieve the above purpose, this application provides a low-voltage battery box with a compartmentalized soft-pack battery cell, including: a housing; an internal steel shell disposed within the housing, the internal steel shell having a plurality of compartment transverse partitions extending in a first direction and a plurality of compartment vertical partitions extending in a second direction, the plurality of compartment transverse partitions and the plurality of compartment vertical partitions cooperate to divide the internal steel shell into a plurality of compartments, the first direction intersects with the second direction; a battery module including a plurality of independently arranged soft-pack battery cells, the soft-pack battery cells are correspondingly arranged in each of the compartments; an upper cover with a plurality of reinforcing ribs provided on the inner side.

[0005] Optionally, each of the reinforcing ribs extends along the first direction and is spaced apart in the second direction.

[0006] Optionally, the housing has a bottom and a plurality of side portions circumferentially arranged around the bottom, the bottom and the plurality of side portions enclose a cavity for accommodating the internal steel shell; the housing further includes: a bottom omega beam fixed to the side of the housing bottom facing the internal steel shell.

[0007] Optionally, the first direction is the same as the width direction of the inner steel shell, and the second direction is the same as the length direction of the inner steel shell; a plurality of card slots are provided on the partition vertical partition and are spaced apart in its extending direction, and the partition horizontal partition is clamped with the corresponding partition vertical partition through each card slot.

[0008] Optionally, several of the partition horizontal partitions are equally spaced in the second direction, and / or several of the partition vertical partitions are equally spaced in the first direction.

[0009] Optionally, the partitioned soft-pack battery cell low-voltage battery box further includes: a bottom heating module disposed between the bottom omega beam and the soft-pack battery cell, and the soft-pack battery cell and the bottom heating module are connected through a buffer layer.

[0010] Optionally, the bottom heating module includes: a plurality of heating films, which are correspondingly arranged with the plurality of compartments.

[0011] Optionally, the buffer layer is made of a heat-conducting material.

[0012] Optionally, at least one side of the inner steel shell in its width direction abuts against the outer shell; one side in its length direction abuts against the outer shell, and there is a gap between the other side and the outer shell; the partitioned soft-pack battery cell low-voltage battery box further includes: a BMS hanging beam fixed on one side wall of the inner steel shell; a BMS board fixed on the BMS hanging beam; and a plurality of electrode connection pieces connecting a plurality of soft-pack battery cells according to a preset connection method to form the battery module.

[0013] Optionally, the partitioned soft-pack battery cell low-voltage battery box further includes: an epoxy insulating board disposed between the upper cover and the battery module.

[0014] A partitioned soft-pack battery cell low-voltage battery box proposed in an embodiment of the present application, by providing a double-layer structure of an inner steel shell and an outer shell and using a plurality of partition horizontal partitions and a plurality of partition vertical partitions for partitioning, solves the problem that due to the large volume and rigid structure of the large square shell battery cell, it is difficult to effectively absorb and resist external vibrations during vehicle driving, especially on uneven roads or sharp turns, resulting in easy damage to internal components of the battery, and reduces the impact of vehicle vibration on the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded structural schematic diagram of a partitioned soft-pack battery cell low-voltage battery box according to an embodiment of the present application;

[0016] Figure 2 is an internal structure diagram of a partitioned soft-pack battery cell low-voltage battery box according to an embodiment of the present application when no soft-pack battery cell is placed;

[0017] Figure 3 Explosion structure schematic diagram of another angle of a multi-compartment soft-pack battery cell low-voltage battery box according to an embodiment of the present application;

[0018] Figure 4 Internal structure diagram of a multi-compartment soft-pack battery cell low-voltage battery box according to an embodiment of the present application;

[0019] Wherein, 1. Upper cover; 2. Epoxy insulation board; 3. Internal steel shell; 4. Outer shell; 5. BMS board; 6. Compartment transverse partition; 7. Bottom omega beam; 8. Compartment vertical partition; 9. BMS hanging beam; 10. Bottom heating module; 11. Soft-pack battery cell; 12. Electrode connecting piece.

[0020] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their 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 at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] Please refer to Figures 1 to 4 , an embodiment of the present application provides a multi-compartment soft-pack battery cell low-voltage battery box. The multi-compartment soft-pack battery cell low-voltage battery box may include: an outer shell 4, an inner steel shell 3, a battery module, and an upper cover 1. Among them, the inner steel shell 3 is disposed inside the outer shell 4. The inner steel shell 3 has a plurality of compartment transverse partitions 6 extending in a first direction and a plurality of compartment vertical partitions 8 extending in a second direction. The plurality of compartment transverse partitions 6 and the plurality of compartment vertical partitions 8 cooperate to divide the inner steel shell 3 into a plurality of compartments. The first direction intersects with the second direction. The battery module includes a plurality of independently arranged soft-pack battery cells, and the soft-pack battery cells are correspondingly arranged in each of the compartments one by one. A plurality of reinforcing ribs are provided on the inner side of the upper cover 1.

[0026] In this embodiment, the battery box has a double-layer structure, that is, it is composed of an outer shell 4 and an inner steel shell 3. Thus, the impact of horizontal collision on the internal battery cells is greatly reduced. A plurality of compartment transverse partitions 6 and a plurality of compartment vertical partitions 8 divide the space where the inner steel shell 3 is located into a plurality of compartments. Each soft-pack battery cell 11 is sequentially placed in a plurality of compartments. By setting the compartment structure, the vibration impact caused by vehicle bumps can be further reduced and dispersed. The upper cover 1 presses the battery cell module through the reinforcing ribs at the top. Thus, there is no space for displacement of the battery module in the up and down directions, and the vibration impact in the up and down directions is also reduced. It can be seen that the battery box provided by the present application can dissipate the vibration impact generated by bumps in different directions, so as to fully ensure that the internal battery components are not damaged, and improve the overall safety and reliability of the battery box.

[0027] In this exemplary embodiment, each independently arranged soft-pack battery cell can form a complete battery module through series-parallel connection. The specific connection method between each soft-pack battery cell can refer to the prior art and will not be elaborated here.

[0028] It should be noted that the tops of a plurality of soft-pack battery cells 11 are connected in series and / or in parallel through a plurality of electrode connection pieces 12 to form a battery module. Connecting the soft-pack battery cells 11 through the electrode connection pieces 12 can ensure efficient and stable current transmission, enhance the structural strength of the battery module, and at the same time contribute to heat dissipation and maintaining thermal balance, improving the overall safety and system performance of the battery box.

[0029] In addition, the first direction is the Figure 2 X direction in Figure 2 and the second direction is the

[0030] Y direction in

[0031] In some specific embodiments, the first direction may specifically be the length direction of the inner steel shell 3, and the second direction may specifically be the width direction of the inner steel shell 3. In this way, it is equivalent to arranging a plurality of compartments in the length direction and width direction of the inner steel shell 3.

[0032] Taking the first direction as the length direction of the inner steel shell 3 and the second direction as the width direction of the inner steel shell 3 as an example, in an exemplary embodiment, the compartment vertical partition 8 has a plurality of card slots spaced apart in its extending direction, and the compartment horizontal partition 6 is snap-fitted with the corresponding compartment vertical partition 8 through each card slot. In this way, the inner steel shell 3 is divided into a plurality of compartments through the cooperation of the compartment vertical partition 8 and the compartment horizontal partition 6. Of course, in other embodiments, the compartment horizontal partition 6 and the compartment vertical partition 8 may also have other cooperation methods, which will not be elaborated here one by one.

[0033] In the exemplary embodiment, continue to refer to Figure 1 where the outer shell 4 has a bottom and a plurality of side parts arranged circumferentially around the bottom, and the bottom and the plurality of side parts enclose a cavity for accommodating the inner steel shell 3, that is, in Figure 1In [the above situation], the outer shell 4 is open upward. The outer shell 4 may further include a bottom omega beam 7, and the bottom omega beam 7 is fixed to one side of the bottom of the outer shell 4 facing the inner steel shell 3. Exemplarily, the number of the bottom omega beams 7 may be multiple.

[0034] Specifically, the bottom omega beam 7 is provided on the inner bottom wall of the outer shell 4 to support each soft-pack battery cell. Since the bottom omega beam 7 has a certain height, in this way, a certain gap is formed between each soft-pack battery cell 11 and the inner bottom wall of the outer shell 4, so that other structures can be filled in this gap. For example, a buffer structure, a heat dissipation structure, etc. can be filled in this gap. For specific reference, please refer to the introduction of the subsequent embodiments, which will not be elaborated here for the time being.

[0035] It should be noted that the internal resistance of the battery in the current low-voltage battery boxes on the market is relatively large, which is not conducive to large-current discharge. The soft-pack battery cells used in this application have a smaller internal resistance than the square large single-cell batteries, that is, the large square shell battery cells, and are more suitable for the application scenarios of large-current discharge. The design of the omega beam can provide sufficient strength while reducing materials, ensuring good impact resistance performance, so that the battery box can better protect the internal components when encountering impact; at the same time, the design of the omega beam can optimize the heat dissipation effect, contribute to the temperature control of the battery, thereby prolonging the battery life and improving the performance.

[0036] Continue to refer to Figure 2 In an exemplary embodiment, in this embodiment, several compartment transverse partitions 6 may be equally spaced in the second direction, and / or several compartment vertical partitions 8 may be equally spaced in the first direction. That is, the inner steel shell 3 is divided into several equally spaced compartments by the compartment transverse partitions 6 and the compartment vertical partitions 8. In this way, it is beneficial to realize standardized production and installation, and thus it is more beneficial to control the production quality of the battery box.

[0037] It should be noted that the current low-voltage battery boxes on the market also have the following deficiencies: insufficient thermal management. Since the traditional battery cells have a more prominent problem of heat accumulation when working under high load, and the large square shell design is not conducive to the rapid conduction and dissipation of heat, increasing the risk of battery overheating, which not only affects the efficiency of the battery but also may shorten the service life of the battery. Based on this, the battery box provided by the embodiment of this application places a bottom heating module 10 below the soft-pack battery cells 11, which can solve the problem that the traditional large square shell design is not conducive to the rapid conduction and dissipation of heat, and can enable the battery to maintain the best working state in various environments.

[0038] Please refer to Figure 3 The compartmented soft-pack battery cell low-voltage battery box may further include: a bottom heating module 10, the bottom heating module 10 is arranged between the bottom omega beam 7 and the soft-pack battery cells 11, and the soft-pack battery cells 11 and the bottom heating module 10 are connected through a buffer layer.

[0039] Among them, the bottom heating module 10 can heat the soft-pack battery cell. The bottom heating module 10 is connected to the soft-pack battery cell 11 through a buffer layer, which increases the buffering effect on the soft-pack battery cell during vehicle vibration.

[0040] In an exemplary embodiment, the bottom heating module 10 includes a plurality of heating films, and each heating film is correspondingly arranged with a plurality of compartments one by one. The buffer layer is made of a heat-conducting material.

[0041] Among them, the bottom heating module 10 is formed by connecting a plurality of heating films to each other, and each heating film corresponds to each compartment one by one, thereby forming a distributed independent heating structure. Such an independent compartment heating design can enable the battery to maintain the best working state in various environments, making the heat transfer of the bottom heating module 10 more uniform. In other words, the bottom heating module 10 of this structure heats the battery more evenly in a cold state, improving the adaptability and reliability of the entire battery box and being beneficial to extending the service life of the battery cell.

[0042] The buffer layer is made of a heat-conducting material, so as not to affect the heat transfer of the heating film, that is, it will not affect the heating effect on the soft-pack battery cell. Exemplarily, the heat-conducting material is glue. By pouring glue under the soft-pack battery cell 11, the glue has the function of heat conduction, which can make the battery heating more uniform. At the same time, by pouring glue at the bottom of the soft-pack battery cell 11, the bottom of the soft-pack battery cell 11 can be fixed, reducing the impact force in the horizontal direction when the vehicle vibrates or jolts. Moreover, the buffer layer formed by bottom gluing and the reinforcing ribs in the top cover cooperate to press tightly, greatly weakening the vibration impact of the soft-pack battery cell in the up and down direction of the battery box.

[0043] Please continue to refer to Figure 1 、 Figure 2 , at least one side of the inner steel shell 3 in its width direction abuts against the outer shell 4; one side of it in its length direction abuts against the outer shell 4, and there is a gap between the other side and the outer shell 4. The compartmentalized soft-pack battery cell low-voltage battery box may further include a BMS hanging beam 9, a BMS board 5, and a plurality of electrode connection pieces 12. The BMS hanging beam 9 is fixed on one side wall of the inner steel shell 3, the BMS board 5 is fixed on the BMS hanging beam 9, and the plurality of electrode connection pieces 12 connect a plurality of soft-pack battery cells according to a preset connection method to form a battery module.

[0044] In this embodiment, the BMS hanging beam 9 can be fixed on one side wall of the inner steel shell 3 by screws, the BMS board 5 can be fixed on the BMS hanging beam 9 by screws, both sides of the inner steel shell 3 in its width direction abut against the outer shell 4, one side of the inner steel shell 3 in its length direction abuts against the outer shell 4, and there is a gap between the other side and the outer shell 4. The gap existing between the inner steel shell 3 and the outer shell 4 is used to place the BMS hanging beam 9 and the BMS board 5.

[0045] It should be noted that the BMS board 5 is used to monitor the battery status, protect the battery safety, manage the battery charging and discharging process, ensure the stable operation of the battery system and extend the service life of the battery. The BMS board 5 is fixed on the BMS hanging beam 9 by screws, so that when maintenance or replacement of the BMS board 5 is required, the operation can be carried out conveniently and quickly, and the internal space of the battery box is optimized. The whole formed by the BMS board and the BMS hanging beam is fixed on the outer side of the internal steel shell 3 by screws, considering the heat dissipation problem of the BMS board to ensure that the BMS board maintains an appropriate temperature during operation.

[0046] Please continue to refer to Figure 1 , the compartmentalized soft-pack battery cell low-voltage battery box may further include an epoxy insulating board 2, and the epoxy insulating board 2 is disposed between the upper cover 1 and the battery module, and the upper cover 1 presses the battery module through a plurality of reinforcing ribs provided on its inner side.

[0047] In this embodiment, the upper cover 1 can press the battery module through a plurality of reinforcing ribs provided on its inner side, so that there is no displacement space for the soft-pack battery cell 11 in the up and down directions, and the impact in the up and down directions caused by vehicle bumps can be reduced. The epoxy insulating board 2 can be disposed between the upper cover 1 and the battery module, and the epoxy insulating board 2 can provide electrical insulation and mechanical support, prevent current leakage and short circuit, and at the same time maintain the stability and durability of the battery box.

[0048] It should be noted that in this embodiment, the double-layer shell is provided and the internal compartmentalization can reduce the impact of vehicle vibration on the battery in the left and right directions when the vehicle is running. Gluing at the bottom of the soft-pack battery cell 11 and using the upper cover 1 for top pressing can reduce the impact of vehicle vibration on the battery in the up and down directions when the vehicle is running.

[0049] The compartmentalized soft-pack battery cell low-voltage battery box provided by the embodiment of the present application can be applied to at least the following scenarios: vehicle starting, providing necessary starting current for the vehicle to ensure smooth starting of the vehicle; the original vehicle circuit system, providing continuous and stable power support for electronic devices such as vehicle lighting, navigation, and air conditioning; power supply for living when parked, providing power for living when the vehicle is parked, such as for models like RVs, including but not limited to cooking, entertainment systems, lighting, parking air conditioners, and small household appliances.

[0050] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A low-voltage battery box for a partitioned soft-pack battery cell, characterized in that, Comprising: A housing (4); An inner steel shell (3) disposed within the housing (4), the inner steel shell (3) having a plurality of compartment transverse partitions (6) extending in a first direction and a plurality of compartment vertical partitions (8) extending in a second direction, the plurality of compartment transverse partitions (6) cooperating with the plurality of compartment vertical partitions (8) to divide the inner steel shell (3) into a plurality of compartments, the first direction intersecting the second direction; A battery module including a plurality of independently arranged soft-pack battery cells (11), the soft-pack battery cells (11) being disposed in each of the compartments in one-to-one correspondence; An upper cover (), with a plurality of reinforcing ribs provided on the inner side.

2. The divided-compartment flexible-pack battery cell low-voltage battery box according to claim 1, wherein Each of the reinforcing ribs extends along the first direction and is spaced apart in the second direction.

3. The low-voltage battery box for the partitioned soft-pack battery cell according to claim 1, wherein, The housing (4) has a bottom and a plurality of side portions circumferentially arranged around the bottom, the bottom and the plurality of side portions enclosing a cavity for accommodating the inner steel shell (3); The housing (4) further includes: A bottom omega beam (7) fixed to the side of the bottom of the housing (4) facing the inner steel shell (3).

4. The low-voltage battery box for the partitioned soft-pack battery cells as described in claim 1, wherein The first direction is the same as the width direction of the inner steel shell (3), and the second direction is the same as the length direction of the inner steel shell (3); The compartment vertical partition (8) has a plurality of card slots spaced apart in its extending direction, and the compartment transverse partition (6) is snap-connected to the corresponding compartment vertical partition (8) through each of the card slots.

5. The partitioned soft-pack battery cell low-voltage battery box according to claim 4, wherein, The plurality of compartment transverse partitions (6) are equally spaced in the second direction, and / or the plurality of compartment vertical partitions (8) are equally spaced in the first direction.

6. The low-voltage battery box for the partitioned soft-pack battery cell according to claim 3, wherein The compartmented soft-pack battery cell low-voltage battery box further includes: A bottom heating module (10) disposed between the bottom omega beam (7) and the soft-pack battery cells (11), and the soft-pack battery cells (11) and the bottom heating module (10) are connected through a buffer layer.

7. The low-voltage battery box for the divided-chamber soft-pack battery cell according to claim 6, characterized in that, The bottom heating module (10) includes: A plurality of heating films, provided corresponding to the plurality of compartments one by one.

8. The low-voltage battery box for the partitioned soft-pack battery cell according to claim 6, wherein The buffer layer is made of a heat-conducting material.

9. The low-voltage battery box for the partitioned soft-pack battery cell according to claim 1, wherein, At least one side of the inner steel shell (3) in its width direction abuts against the housing (4); one side of it in its length direction abuts against the housing (4), and there is a gap between the other side and the housing (4); The compartmented soft-pack battery cell low-voltage battery box further includes: A BMS hanging beam (9) fixed to one side wall of the inner steel shell (); A BMS board (5) fixed to the BMS hanging beam (9); A plurality of electrode connection pieces (12) connecting a plurality of soft-pack battery cells according to a preset connection method to form the battery module.

10. The partitioned soft-pack battery cell low-voltage battery box according to claim 1, wherein, The compartmented soft-pack battery cell low-voltage battery box further includes: An epoxy insulating board (2) disposed between the upper cover (1) and the battery module.

Images