Battery box

Abstract

The utility model is applicable to the technical field of battery packs, and provides a battery box, the peripheral side wall of the battery pack in the battery box is in sliding fit with the peripheral inner wall of the box body, so that the displacement of the battery pack relative to the box body can be limited in the height direction of the box body. When the battery box provided by the utility model is applied to a vibration / bumping scene, the battery pack can move up and down relative to the box body, the battery pack can be buffered through the repulsive force between the third magnet and the first magnet and the repulsive force between the fourth magnet and the second magnet so as to be prevented from being damaged, and meanwhile, in the movement process of the battery pack, the battery pack is prevented from being damaged. When the battery pack vibrates, air in the box body can be compressed, counter-acting force generated by the compressed air on the battery pack can counteract part of magnet repulsive force, movement of the battery pack is slowed down, so that the effect similar to a damper is achieved, the process of damping the battery pack is completed, and the magnets are long in service life and difficult to lose efficacy due to the material characteristics of the magnets. Therefore, the battery box provided by the utility model can have relatively long service life.

Description

Technical Field

[0001] The present application belongs to the technical field of battery packs, and in particular, relates to a battery box. Background Art

[0002] As a power source under complex working conditions, the battery pack often encounters bumps during the power supply process, which causes the battery pack to vibrate greatly, causing the battery cells to swing up and down inside the battery pack, resulting in damage to the battery pack and reducing the service life of the battery pack.

[0003] Conventional battery pack protection solutions generally use buffer materials such as metal springs, EPE foam and other materials, but these materials will age and fatigue as the usage time continues to increase and the usage environment changes, the buffering effect will be weakened, the protection effect on the battery pack will deteriorate, and the battery pack cannot be shock-absorbing. Utility Model Content

[0004] The embodiment of the present application provides a battery box that can solve the problem that the buffer material used in the existing battery box is easily aged and fails, resulting in a short battery life and an inability to reduce shock to the battery pack.

[0005] The present application provides a battery box, including:

[0006] A sealed box body, wherein two opposite inner walls in the height direction are respectively provided with a first magnet and a second magnet;

[0007] A battery pack is arranged in a box, and the peripheral side wall of the battery pack is slidably fitted with the peripheral inner wall of the box. A third magnet and a fourth magnet are respectively arranged at opposite ends of the battery pack in the height direction. The third magnet is arranged opposite to the first magnet, and the polarity of the opposite surface of the third magnet is the same as that of the first magnet. The fourth magnet is arranged opposite to the second magnet, and the polarity of the opposite surface of the fourth magnet is the same as that of the second magnet.

[0008] Optionally, the cross-sections of the box body and the battery pack are both rectangular, the inner wall of the box body is a smooth surface, and the side wall of the battery pack is circumferentially provided with a circle of embedded grooves, and a sealing ring is provided in the embedded groove.

[0009] Optionally, the third magnet and the fourth magnet are both electromagnets.

[0010] Optionally, the battery box also includes a controller, and the power lines of the third magnet and the fourth magnet are electrically connected to the controller respectively, and the controller is used to adjust the magnetic force of the third magnet and the fourth magnet.

[0011] Optionally, a first micro switch and a second micro switch are respectively provided on two opposite inner walls of the box in the height direction, and a first alarm electrically connected to the first micro switch and a second alarm electrically connected to the second micro switch are provided on the outside of the box. The first alarm is used to send an alarm signal when the upper end of the battery pack touches the first micro switch; the second alarm is used to send an alarm signal when the lower end of the battery pack touches the second micro switch.

[0012] Optionally, a first circuit and a second circuit are respectively provided on two opposite inner walls of the box in the height direction, and a third alarm electrically connected to the first circuit and a fourth alarm electrically connected to the second circuit are provided on the outside of the box. The first circuit and the second circuit are both in an open-circuit state, and the open-circuit points of the first circuit and the second circuit extend toward the inside of the box. When the third magnet at the upper end of the battery pack touches the first circuit, the first circuit is turned on and the third alarm sends out an alarm signal; when the fourth magnet at the lower end of the battery pack touches the second circuit, the second circuit is turned on and the fourth alarm sends out an alarm signal.

[0013] Optionally, a first conductor is provided on the third magnet corresponding to the first circuit, and a second conductor is provided on the fourth magnet corresponding to the second circuit. When the distance between the battery pack and the first magnet reaches a set range, the first conductor will connect the first circuit, thereby causing the third alarm to send out an alarm signal; when the distance between the battery pack and the second magnet reaches a set range, the second conductor will connect the second circuit, thereby causing the fourth alarm to send out an alarm signal.

[0014] Optionally, buffer members are provided around the first magnet and the second magnet.

[0015] Optionally, the buffer is an annular EPE foam, and the first magnet and the second magnet are respectively embedded in the EPE foam around it.

[0016] The above solution of the present application has the following beneficial effects:

[0017] In the embodiment of the present application, a first magnet and a second magnet are arranged on two opposite inner walls in the height direction of the box, and a third magnet and a fourth magnet are arranged at opposite ends of the battery pack. The third magnet is arranged opposite to the first magnet and has the same polarity of the opposite surface, and the fourth magnet is arranged opposite to the second magnet and has the same polarity of the opposite surface. Since the peripheral side wall and the peripheral inner wall of the box slide and fit, the displacement of the battery pack relative to the box will be limited in the height direction of the box. When the battery box provided by the present application is applied to a vibration / bumping scene, the battery pack will move up and down relative to the box. Through the repulsive force between the third magnet and the first magnet and the repulsive force between the fourth magnet and the second magnet, the battery pack can be buffered to avoid the upper and lower ends of the battery pack from colliding with the upper and lower ends of the box and being damaged. At the same time, during the movement of the battery pack, the air in the box will be compressed in the direction of movement. The reaction force generated by the compressed air on the battery pack will offset part of the magnet repulsive force and slow down the movement of the battery pack, so it plays a role similar to a damper to complete the process of shock absorbing the battery pack. The magnet has a long service life due to its material characteristics and is difficult to fail. Therefore, the battery box provided by the present application can have a long service life.

[0018] Other beneficial effects of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a battery box provided in one embodiment of the present application;

[0021] Figure 2 A schematic diagram of the cross-sectional structure of a battery box in the height direction provided in one embodiment of the present application;

[0022] Figure 3 A schematic structural diagram of a battery pack, a third magnet, and a first conductor provided in one embodiment of the present application.

[0023] [Description of Reference Numerals]

[0024] 1. Box body; 2. First magnet; 3. Second magnet; 4. Battery pack; 5. Third magnet; 61. First circuit; 62. Second circuit; 63. Third alarm; 64. Fourth alarm; 7. First conductor; 8. Buffer; 9. Groove; 10. Sealing ring. DETAILED DESCRIPTION

[0025] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0026] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0027] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0029] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0030] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0031] The present application provides a battery box, such as Figure 1 and Figure 3As shown, it includes a sealed box body 1 and a battery pack 4, and the first magnet 2 and the second magnet 3 are respectively arranged on the two opposite inner walls in the height direction of the box body 1; the battery pack 4 is arranged in the box body 1, and the peripheral side wall of the battery pack 4 is slidably fitted with the peripheral inner wall of the box body 1, and the third magnet 5 and the fourth magnet (not shown in the figure) are respectively arranged at the opposite ends of the battery pack 4 in the height direction, the third magnet 5 is arranged opposite to the first magnet 2, and the polarity of the opposite surface of the third magnet 5 and the first magnet 2 is the same, and the fourth magnet is arranged opposite to the second magnet 3, and the polarity of the opposite surface of the fourth magnet and the second magnet 3 is the same.

[0032] In an embodiment of the present application, a first magnet 2 and a second magnet 3 are arranged on two opposite inner walls in the height direction of the box body 1, and a third magnet 5 and a fourth magnet are arranged at opposite ends of the battery pack 4. The third magnet 5 is arranged opposite to the first magnet 2 and the opposite surfaces have the same polarity, and the fourth magnet is arranged opposite to the second magnet 3 and the opposite surfaces have the same polarity. Since the peripheral side wall slides in fit with the peripheral inner wall of the box body 1, the displacement of the battery pack 4 relative to the box body 1 will be limited in the height direction of the box body 1. When the battery box provided in the present application is used in a vibration / bump scenario, the battery pack 4 will move up and down relative to the box body 1. The repulsive force between the third magnet 5 and the first magnet 2 and the repulsive force between the fourth magnet and the second magnet 3 can buffer the battery pack 4 to avoid the upper and lower ends of the battery pack 4 colliding with the upper and lower ends in the box body 1 and being damaged. At the same time, during the movement of the battery panel 4, the air in the box body 1 will be compressed in the direction of movement. The reaction force generated by the compressed air on the battery panel will offset part of the magnet repulsive force and slow down the movement of the battery pack 4, thereby playing a role similar to a damper to complete the shock absorbing process of the battery pack 4. In addition, due to the material properties of the magnet, it has a long service life and is difficult to fail. Therefore, the battery box provided in the present application can have a long service life.

[0033] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the cross-sections of the box body 1 and the battery pack 4 are both rectangular, the inner wall of the box body 1 is a smooth surface, and the side wall of the battery pack 4 is circumferentially provided with a circle of embedded grooves 9, and a sealing ring 10 is provided in the embedded grooves 9.

[0034] The cross-sections of the above-mentioned box body 1 and battery pack 4 are both rectangular, which are easier to design and manufacture, and are easier to process and assemble than other shapes; and the rectangular cross-section can make more effective use of space, so that the battery pack 4 can accommodate more battery cells in the same volume, thereby improving energy density and power density. The above-mentioned groove 9 and sealing ring 10 are used to make the battery pack 4 more sealed when sliding relative to the box body 1, so as to better compress the air in the box body 1.

[0035] In some embodiments of the present application, the third magnet and the fourth magnet are both electromagnets.

[0036] The third magnet and the fourth magnet can facilitate the control of the magnetic force of the third magnet and the fourth magnet, so that the magnetic force of the third magnet and the fourth magnet can be adjusted as needed to better buffer the battery pack.

[0037] In some embodiments of the present application, the battery box also includes a controller (not shown in the figure), and the power lines of the third magnet and the fourth magnet are respectively electrically connected to the controller, and the controller is used to adjust the magnetic force of the third magnet and the fourth magnet.

[0038] It can be understood that the above-mentioned external control device can be a control device such as a controller, a microcomputer or a computer, and the external control device can be a control device of the battery pack structure. When the battery pack structure is used for new energy vehicles, the above-mentioned external control device can also be a vehicle computer.

[0039] In some embodiments of the present application, not shown in the figures, a first microswitch and a second microswitch are respectively provided on two opposite inner walls of the box in the height direction, and a first alarm electrically connected to the first microswitch and a second alarm electrically connected to the second microswitch are provided on the outside of the box, the first alarm is used to send out an alarm signal when the upper end of the battery pack touches the first microswitch; the second alarm is used to send out an alarm signal when the lower end of the battery pack touches the second microswitch.

[0040] When the battery pack moves due to bumps, it will move up and down relative to the case. The battery pack is buffered by the repulsive force between the third magnet and the first magnet and the repulsive force between the fourth magnet and the second magnet. When the impact force is too large, the battery pack may move too far relative to the case, which may easily damage the battery pack. Therefore, the first microswitch, the second microswitch, the first alarm and the second alarm are provided. When the battery pack moves too far relative to the case, the upper end of the battery pack will touch the first microswitch to cause the first alarm to send out an alarm signal, or the lower end of the battery pack will touch the second microswitch to cause the second alarm to send out an alarm signal.

[0041] It is understandable that in the above embodiment, the length of the trigger spring of the first microswitch and the second microswitch can be set as needed, so that an alarm can be issued when the movement stroke of the battery pack relative to the box reaches a set range. The length of the trigger spring of the first microswitch and the second microswitch is set so that an alarm signal is issued when the up and down amplitude of the battery pack is too large when it bumps relative to the box, reminding the staff that the current battery pack amplitude is too large so that timely adjustments can be made to prevent the battery pack from being damaged by the excessive up and down amplitude of the battery pack relative to the box.

[0042] In some embodiments of the present application, Figure 1 and Figure 2As shown, a first circuit 61 and a second circuit 62 are respectively provided on two opposite inner walls of the box body 1 in the height direction, and a third alarm 63 electrically connected to the first circuit 61 and a fourth alarm 64 electrically connected to the second circuit 62 are provided on the outer side of the box body 1. The first circuit 61 and the second circuit 62 are both in an open circuit state, and the open circuit parts of the first circuit 61 and the second circuit 62 extend toward the inside of the box body 1. When the third magnet 5 at the upper end of the battery pack 4 touches the first circuit 61, the first circuit 61 is turned on, and the third alarm 63 sends an alarm signal; when the fourth magnet at the lower end of the battery pack 4 touches the second circuit 62, the second circuit 62 is turned on, and the fourth alarm 64 sends an alarm signal.

[0043] When the battery pack 4 moves due to bumps, it will move up and down relative to the case 1. The battery pack 4 is buffered by the repulsive force between the third magnet 5 and the first magnet 2 and the repulsive force between the fourth magnet and the second magnet 3. When the impact force is too large, the battery pack 4 may move too far relative to the case 1, which may easily damage the battery pack 4. Therefore, the first circuit 61, the second circuit 62, the third alarm 63 and the fourth alarm 64 are provided. When the battery pack 4 moves too far relative to the case 1, the third magnet 5 at the upper end of the battery pack 4 will touch the open circuit of the first circuit 61 to make the first circuit 61 conductive and the third alarm 63 sends out an alarm signal. The fourth magnet at the lower end of the battery pack 4 will touch the open circuit of the second circuit 62 to make the second circuit 62 conductive and the fourth alarm 64 sends out an alarm signal.

[0044] It can be understood that in the above embodiment, the length of the first line 61 and the second line 62 extending into the box body 1 can be set as needed, so that an alarm can be issued when the movement stroke of the battery pack 4 relative to the box body 1 reaches a set range. The length of the first line 61 and the second line 62 extending into the box body 1 is set, so that an alarm signal is issued when the up and down amplitude of the battery pack 4 is too large when it is bumped relative to the box body 1, to remind the staff that the current amplitude of the battery pack 4 is too large so as to make timely adjustments, thereby preventing the battery pack 4 from being damaged due to the excessive up and down amplitude when it is bumped relative to the box body 1.

[0045] Exemplarily, the first alarm, the second alarm, the third alarm 63 and the fourth alarm 64 may be sound and light alarms.

[0046] In some embodiments of the present application, Figure 1As shown, a first conductor 7 is provided on the third magnet 5 corresponding to the first circuit 61, and a second conductor (not shown in the figure) is provided on the fourth magnet corresponding to the second circuit 62. When the distance between the battery pack 4 and the first magnet 2 reaches a set range, the first conductor 7 will turn on the first circuit 61 so that the third alarm 63 sends an alarm signal; when the distance between the battery pack 4 and the second magnet 3 reaches a set range, the second conductor will turn on the second circuit 62 so that the fourth alarm 64 sends an alarm signal.

[0047] The above-mentioned first conductor 7 and the second conductor can better make the first circuit 61 and the second circuit 62 conductive, so as to improve the first circuit 61 or the second circuit 62 conductive when the distance between the battery pack 4 and the first magnet 2 or the second magnet 3 reaches the set range, thereby accurately sending an alarm signal when the battery pack 4 moves relative to the box 1 and exceeds the set range.

[0048] In some embodiments of the present application, Figure 1 and Figure 2 As shown, buffer members 8 are disposed around the first magnet 2 and the second magnet 3 .

[0049] The above-mentioned buffer component 8 is used to buffer the battery pack 4. When one or more of the first magnet 2, the second magnet 3, the third magnet 5 and the fourth magnet fail, when the battery pack 4 structure is vibrated by external forces, the buffer component 8 can buffer the battery pack 4 to avoid damage.

[0050] In some embodiments of the present application, the buffer is an annular EPE foam, and the first magnet and the second magnet are respectively embedded in the EPE foam around it.

[0051] The above-mentioned EPE foam can reduce impact force, effectively absorb and disperse external impact force, reduce the impact on the product and reduce the damage rate; at the same time, EPE foam has good softness and elasticity, which can protect the surface of the battery pack from scratches and damage; in addition, it also has the characteristics of waterproof and moisture-proof, which can effectively prevent the product from being affected by moisture during transportation and keep the product dry; EPE foam is an environmentally friendly material, non-toxic and harmless, will not cause pollution to the product, and meets environmental protection requirements; in addition, it also has a long service life and can be reused many times, reducing resource waste and saving costs.

[0052] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A battery box, characterized in that: include: A sealed box, wherein two opposite inner walls in the height direction of the box are respectively provided with a first magnet and a second magnet; and A battery pack is arranged in the box, and the peripheral side wall of the battery pack is slidably fitted with the peripheral inner wall of the box. The battery pack is respectively provided with a third magnet and a fourth magnet at opposite ends in the height direction. The third magnet is arranged opposite to the first magnet, and the polarity of the opposite surface of the third magnet is the same as that of the first magnet. The fourth magnet is arranged opposite to the second magnet, and the polarity of the opposite surface of the fourth magnet is the same as that of the second magnet.

2. The battery box according to claim 1, characterized in that: The cross-sections of the box body and the battery pack are both rectangular, the inner wall of the box body is a smooth surface, and the side wall of the battery pack is circumferentially provided with a circle of embedding grooves, and a sealing ring is provided in the embedding groove.

3. The battery box according to claim 1, characterized in that: The third magnet and the fourth magnet are both electromagnets.

4. The battery box according to claim 3, characterized in that: The battery box also includes a controller, and the power lines of the third magnet and the fourth magnet are electrically connected to the controller respectively. The controller is used to adjust the magnetic force of the third magnet and the fourth magnet.

5. The battery box according to claim 1, characterized in that: The first micro switch and the second micro switch are respectively arranged on the two opposite inner walls of the box in the height direction, and the first alarm electrically connected to the first micro switch and the second alarm electrically connected to the second micro switch are arranged on the outside of the box, the first alarm is used to send out an alarm signal when the upper end of the battery pack touches the first micro switch; the second alarm is used to send out an alarm signal when the lower end of the battery pack touches the second micro switch.

6. The battery box according to claim 1, characterized in that: The first circuit and the second circuit are respectively arranged on the two opposite inner walls of the box in the height direction, and the third alarm electrically connected to the first circuit and the fourth alarm electrically connected to the second circuit are arranged on the outside of the box. The first circuit and the second circuit are both in an open-circuit state, and the open-circuit points of the first circuit and the second circuit extend toward the inside of the box. When the third magnet at the upper end of the battery pack touches the first circuit, the first circuit is turned on and the third alarm sends an alarm signal; when the fourth magnet at the lower end of the battery pack touches the second circuit, the second circuit is turned on and the fourth alarm sends an alarm signal.

7. The battery box according to claim 6, characterized in that: A first conductor is provided on the third magnet corresponding to the first circuit, and a second conductor is provided on the fourth magnet corresponding to the second circuit. When the distance between the battery pack and the first magnet reaches a set range, the first conductor will turn on the first circuit, thereby causing the third alarm to send out an alarm signal; when the distance between the battery pack and the second magnet reaches a set range, the second conductor will turn on the second circuit, thereby causing the fourth alarm to send out an alarm signal.

8. The battery box according to claim 1, characterized in that: Buffering parts are arranged around the first magnet and the second magnet.

9. The battery box according to claim 8, characterized in that: The buffer is an annular EPE foam, and the first magnet and the second magnet are respectively embedded in the EPE foam around them.

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