CN218957878U - Battery box, battery and power consumption device - Google Patents

Abstract

The application relates to a battery box, a battery and an electricity utilization device, wherein the battery box comprises a containing box, a protecting piece and a buffer part, the bottom wall of the containing box is provided with a heat exchange flow channel, the bottom wall is also provided with a spacing section, and the spacing section is arranged adjacent to the heat exchange flow channel; the protection piece is connected with the holding box and is located the below of diapire, the protection piece is provided with body portion and towards holding the bellied supporting part in the case, along the direction of height of battery box, buffer position is located between supporting part and the interval section, supporting part and buffer are used for supporting in the interval section when the protection piece atress, and heat transfer runner separates along the direction of height of battery box with body portion, in order to form the energy-absorbing space, when the battery bottom of the case receives external force to strike, supporting part and buffer can conduct external force to interval section department, avoid external force directly to act on the heat transfer runner, the risk of heat transfer runner deformation has been reduced, the life of battery box has been prolonged, and buffer can compression set, in order to absorb the deflection of a part protection piece.

Description

Battery box, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a battery box, a battery and an electric device.

Background

Batteries are widely used as a main energy storage device in various fields such as home appliances, electric vehicles, aerospace and the like. The battery includes battery cell and battery box, and the battery box can hold battery cell. The battery box body is provided with a water cooling plate and a bottom guard plate, the water cooling plate can bear battery monomers, and the water cooling plate is provided with a water cooling flow channel for cooling the battery monomers; the bottom guard plate is positioned below the water cooling plate and used for preventing the battery box body from damaging the water cooling plate when the bottom of the battery box body is impacted. However, the bottom guard plate in the prior art has difficulty in protecting the water-cooling flow passage from compression deformation when the bottom of the battery case is impacted.

Disclosure of Invention

The application provides a battery box, battery and power consumption device, when the battery box bottom receives external impact, can reduce the risk that the heat transfer runner takes place to warp.

The first aspect of the application provides a battery box body, which comprises a containing box, a protecting piece and a buffer part, wherein the bottom wall of the containing box is provided with a heat exchange flow channel, the bottom wall is also provided with a spacing section, and the spacing section is arranged adjacent to the heat exchange flow channel; the protection piece is connected with the holding box and is located the below of diapire, and the protection piece is provided with body portion and towards holding the bellied supporting part in the case, along the direction of height of battery box, and buffer position is located between supporting part and the interval section, and supporting part and buffer are used for supporting in the interval section when the protection piece atress, and heat transfer runner separates along the direction of height of battery box with body portion to form the energy-absorbing space. In the technical scheme of this embodiment, the guard piece is provided with towards holding the bellied supporting part in the case, along the direction of height of battery box, supporting part and buffer are used for supporting in the interval when the guard piece atress, and heat transfer runner separates along the direction of height of battery box with the guard piece, in order to form the energy-absorbing space, when the battery bottom of the case receives external force to strike, supporting part and buffer can conduct external force to interval department, avoid external force directly to act on the heat transfer runner, the risk of heat transfer runner deformation has been reduced, the life of battery box has been improved, and buffer can compression deformation, in order to absorb the deflection of a portion guard piece, simultaneously when battery box vibrates, buffer can avoid the guard piece to produce abnormal sound with holding case direct contact.

In some embodiments, the cushioning portion is bonded to the support portion. So set up, the convenient assembly is changed.

In some embodiments, the minimum thickness of the support portion is K, the minimum distance between the support portion and the spacer is H1, and 2.ltoreq.H2/K.ltoreq.5 along the height direction of the battery case. So set up, can make the buffering portion satisfy the user demand to the buffering effect of external force, in addition when making the protection effect of protector satisfy user demand, be unlikely to make the protector overweight.

In some embodiments, 2 mm.ltoreq.H2.ltoreq.5mm.

In some embodiments, the spacer, the support and the buffer are each provided in plurality, and each spacer is correspondingly provided with the support and the buffer. The arrangement can maximally ensure the protection effect on the heat exchange flow channel.

In some embodiments, the body portion includes a first body portion and a second body portion that are connected to each other in a height direction of the battery case, the first body portion is integrally formed with the support portion, an energy absorbing space is formed between the first body portion and the heat exchanging flow passage, and the second body portion is connected to the receiving case. In the technical scheme of this application embodiment, for guaranteeing guard piece intensity, make supporting part and first body integrated into one piece, then first body and second body are connected.

In some embodiments, the body portion is integrally formed with the support portion, the body portion being connected to the containment bin. So set up, when guaranteeing guard piece intensity requirement, the furthest guarantees the lightweight, guarantees the balance of intensity and lightweight.

In some embodiments, the minimum height of the energy absorbing space is H2, the minimum thickness of the body portion is M, and 4.ltoreq.H2M.ltoreq.10 along the height direction of the battery box. By the arrangement, the absorption capacity of the energy absorption space to external force can meet the use requirement, and the protective piece is not excessively heavy.

In some embodiments, 10 mm.ltoreq.H2.ltoreq.20 mm.

In some embodiments, the accommodating case includes a heat exchange member and an accommodating frame, the accommodating frame is provided with a plurality of accommodating spaces for accommodating the battery cells, the heat exchange member is positioned between the protection member and the accommodating frame, and the protection member is connected with the accommodating frame; the heat exchange part is provided with a heat exchange flow channel at the position corresponding to each accommodating space. In the technical scheme of this application embodiment, the heat exchange member corresponds every accommodation space's position department and all is provided with the heat transfer runner, and the furthest guarantees the cooling effect to the battery monomer.

In some embodiments, the accommodating frame is provided with a main body frame and a plurality of supporting beams connected with the inner side walls of the main body frame, and the supporting beams and the main body frame enclose an accommodating space; the guard is connected with the main body frame and the supporting beam. In the technical scheme of this application embodiment, the guard piece is connected with main part frame and supporting beam, has improved the guard piece and has held the connection stability of frame.

In some embodiments, the shielding member is provided with a plurality of mounting bosses protruding toward the inside of the accommodating case, and the heat exchanging member is provided with a plurality of through holes through which the mounting bosses are connected with the accommodating frame. So set up, the guard of being convenient for is connected with holding the frame.

The second aspect of the present application provides a battery, including a battery box and a battery cell, the battery box is the battery box in the above embodiment, and the battery cell is accommodated in an accommodation box of the battery box.

A third aspect of the present application provides an electrical device comprising a battery according to the above embodiments, the battery being configured to provide electrical energy.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of the battery of fig. 1;

FIG. 3 is a schematic view of the guard and support of FIG. 2 in one embodiment;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view of the guard and support of FIG. 2 in another embodiment;

FIG. 6 is a cross-sectional view taken along B-B of FIG. 5;

FIG. 7 is an enlarged view of the portion I of FIG. 2;

fig. 8 is an enlarged view at II in fig. 2.

Reference numerals:

1000-vehicle;

100-cell;

10-a battery box body;

1-a containing box;

11-a heat exchange member;

111-heat exchange flow channels;

112-spacer segments;

113-a through hole;

12-a containment frame;

121-an accommodation space;

122-a main body frame;

123-supporting beams;

13-a case cover;

2-guard;

21-a body portion;

211-a first body portion;

212-a second body portion;

213-mounting bosses;

213 a-mounting holes;

22-a support;

3-a buffer part;

4-energy absorption space;

20-battery cells;

200-a controller;

300-motor.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: there are three cases, a, B, a and B simultaneously. In this application, the character "/" generally indicates that the associated object is an or relationship.

The term "plurality" as used herein refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

From the development of market situation, the application of the power battery as a main energy storage device is wider, and the power battery is widely applied to not only energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also electric vehicles such as electric bicycles, electric motorcycles and electric automobiles, and a plurality of fields such as military equipment and aerospace.

The battery comprises a battery monomer and a battery box body, wherein the battery box body is used for accommodating the battery monomer. The battery cell generates certain heat in the charge and discharge process, so that the temperature is increased, and the temperature increase can influence a plurality of characteristic parameters of the battery cell, such as internal resistance, voltage, available capacity and the like. The bottom of the battery box body is provided with a heat exchange flow channel through which heat exchange medium can flow to cool or heat the battery monomer, thereby meeting the thermal management requirement of the battery. Along the direction of the height of the battery box body, the battery box body is further provided with a bottom guard plate outside the heat exchange flow channel, and when the bottom of the battery box body is impacted (for example, the battery box body is in a state shown in fig. 2 and is impacted by an upward external force), the bottom guard plate is impacted first, so that the battery cell is protected. However, when the bottom guard plate is impacted, for example, a battery is installed in an electric automobile, when the electric automobile is in a bottom supporting or ball striking state in the driving process, the bottom guard plate is limited in protection and can squeeze the heat exchange flow channel, so that the heat exchange flow channel is deformed or even damaged, the cooling effect is further affected, the temperature of a battery monomer is abnormal, and the battery box body needs to be replaced.

Based on the above consideration, in order to solve the problem that the bottom guard plate is difficult to protect the heat exchange flow channel when being impacted and prevent the heat exchange flow channel from deforming, the inventor has conducted intensive studies, and additionally provided with a supporting rib and a buffer part on one side of the bottom guard plate facing the inside of the battery box, the supporting rib and the buffer part are supported in the area of the battery box where the heat exchange flow channel is not arranged when the bottom guard plate is stressed, so that the heat exchange flow channel and the bottom guard plate are separated in the height direction of the battery box to form an energy absorption space, the extrusion force is prevented from directly acting on the heat exchange flow channel, and the risk of deformation of the heat exchange flow channel is reduced.

The battery disclosed herein may be used, but is not limited to, in electrical devices for vehicles, boats, etc. The power supply system with the battery and the like disclosed by the application forming the power utilization device can be used, so that the risk of deformation of a heat exchange runner for cooling the battery monomer can be reduced, and the service life of the battery is prolonged.

The battery cell in the present application may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, to which the embodiment of the present application is not limited. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft pack battery cell are not limited thereto.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a cathode pole piece, an anode pole piece and a separation film. The battery cell mainly relies on metal ions to move between the cathode and anode electrode sheets. The cathode plate comprises a cathode current collector and a cathode active material layer, the cathode active material layer is coated on the surface of the cathode current collector, the current collector without the cathode active material layer protrudes out of the current collector coated with the cathode active material layer, and the current collector without the cathode active material layer is used as a cathode tab. Taking a lithium ion battery as an example, the material of the cathode current collector can be aluminum, and the cathode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like. The anode plate comprises an anode current collector and an anode active material layer, wherein the anode active material layer is coated on the surface of the anode current collector, the current collector without the anode active material layer protrudes out of the current collector coated with the anode active material layer, and the current collector without the anode active material layer is used as an anode lug. The material of the anode current collector may be copper, and the anode active material may be carbon or silicon, etc. In order to ensure that the high current is passed without fusing, the number of cathode lugs is multiple and stacked together, and the number of anode lugs is multiple and stacked together. The material of the diaphragm can be PP or PE. In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The application provides an electric device using a battery as a power source, which can be, but is not limited to, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of explanation, the following embodiments will be described taking the electric device as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a battery case 10 and a battery cell 20, and the battery cell 20 is accommodated in the battery case 10.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the battery box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the battery case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

The battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

According to some embodiments of the present application, as shown in fig. 2-6, the battery box 10 includes a containing box 1, a protecting member 2 and a buffer portion 3, a bottom wall of the containing box 1 is provided with a heat exchange flow channel 111, the bottom wall is further provided with a spacer 112, and the spacer 112 is disposed adjacent to the heat exchange flow channel 111; the protection piece 2 is connected with the accommodating box 1 and is located below the bottom wall, the protection piece 2 is provided with a body part 21 and a supporting part 22 protruding towards the inside of the accommodating box 1, along the height direction Z of the battery box, the buffer part 3 is located between the supporting part 22 and the spacing section 112, the supporting part 22 and the buffer part 3 are used for supporting the spacing section 112 when the protection piece 2 is stressed, and the heat exchange flow channel 111 and the body part 21 are separated along the height direction Z of the battery box 10 so as to form the energy absorption space 4.

When the battery unit 20 needs to be cooled or warmed, the heat exchange medium flows through the heat exchange flow channel 111, and the heat exchange medium can exchange heat with heat generated by the battery unit 20, and the heat exchange medium can be water, air or the like.

In this embodiment, the protection member 2 is provided with a supporting portion 22 protruding toward the inside of the accommodating case 1, along the height direction Z of the battery case 10, the supporting portion 22 and the buffer portion 3 are used for supporting at the spacing section 112 when the protection member 2 is stressed, and the heat exchange flow channel 111 and the protection member 2 are separated along the height direction Z of the battery case 10 to form the energy absorption space 4, when the bottom of the battery case 10 is impacted by external force, for example, the battery case 10 is mounted at the bottom of an electric automobile, when the electric automobile is in a bottom supporting or ball striking state, the supporting portion 22 and the buffer portion 3 can conduct the external force to the spacing section 112, so that the external force is prevented from directly acting on the heat exchange flow channel 111, the risk of deformation of the heat exchange flow channel 111 is reduced, the service life of the battery case 10 is improved, and the buffer portion 3 can be compressively deformed to absorb a part of the deformation of the protection member 2, meanwhile, when the battery case 10 vibrates, for example, when the battery case 10 is mounted in the electric automobile, the vehicle is driven in the running process to vibrate the battery case 10, the buffer portion 3 can absorb the stress generated by the protection member 2, and the protection member 2 is prevented from directly contacting the accommodating case 1.

The spacer 112, the supporting portion 22, and the buffer portion 3 may each be provided in plurality. For example, the protection member 2 may be provided with two opposite supporting portions 22, each supporting portion 22 is correspondingly provided with a buffer portion 3, one supporting portion 22 and the buffer portion 3 are supported on a spacing section 112 located at the beginning end of the heat exchange flow channel 111, and the other supporting portion 22 and the buffer portion 3 are supported on a spacing section 112 located at the tail end of the heat exchange flow channel 111, so that the whole heat exchange flow channel 111 and the whole body portion 21 are separated along the height direction Z of the battery case 10 to form the energy absorption space 4; or the guard 2 may be provided with three supporting portions 22 respectively supported at the interval sections 112 of the start end, the middle portion and the end of the heat exchange flow passage 111; or the support 22 may be more. The supporting part 22 needs to be provided with the corresponding heat exchange flow channels 111 which are uniformly distributed, and after the supporting part 22 and the buffer part 3 are supported on the interval section 112, the energy absorption effect of each energy absorption space 4 is ensured to be consistent when the energy absorption space is impacted by the outside; preferably, each of the interval sections 112 is provided with a supporting portion 22 and a buffer portion 3, respectively, to maximally secure the protection effect on the heat exchange flow passage 111.

The buffer portion 3 may be a silicone foam material or a microporous foam polypropylene material. The buffer 3 may be a cushion pad.

Specifically, the buffer portion 3 may be adhered to the top of the support portion 22, facilitating assembly and replacement.

In addition, in the height direction Z of the battery case 10, the minimum thickness of the support portion 22 is K, the minimum distance between the support portion 22 and the spacer 112 is H1, and 2.ltoreq.H2/K.ltoreq.5. Specifically, the value of H1/K may be 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.

Since the buffer portion 3 is located between the supporting portion 22 and the spacer 112, H1 is the thickness of the buffer portion 3 when the battery case 10 is in the finished state and is not subjected to external impact force. If H1/K is smaller than 2, namely H1 is too small and/or K is too large, when H1 is too small, the thickness of the buffer part 3 is too small, so that the compression deformation space of the buffer part 3 is insufficient, and the effect of energy absorption cannot be achieved when the protective piece 2 is stressed; when K is too large, i.e., the supporting portion 22 is too thick, in order to ensure the overall strength and rigidity of the protection member 2, the thickness of other positions of the protection member 2 needs to be increased correspondingly, which results in that the weight of the protection member 2 is too large, and thus the overall weight of the battery case 10 is increased.

If H1/K is more than 5, namely H1 is too large and/or K is too small, when H1 is too large, the thickness of the buffer part 3 is too large, so that the compression deformation space of the buffer part 3 is too large, the conduction of influence is reduced, and the energy absorption effect is weakened; when K is too small, that is, the support portion 22 is too thin, resulting in a decrease in the strength and rigidity of the support portion 22, the support portion 22 is easily deformed by the acting force when the protector 2 is impacted by the external force, so that the protection effect of the protector 2 is weakened.

Wherein, the numerical range of H1 can be more specifically 2mm and less than or equal to H1 and less than or equal to 5mm. Specifically, the value of H1 may be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc.

In one embodiment, as shown in fig. 2, the accommodating case 1 includes a heat exchanging member 11, an accommodating frame 12, and a case cover 13, the accommodating frame 12 being provided with a plurality of accommodating spaces 121 for accommodating the battery cells 20; the heat exchange piece 11 is positioned at the bottom of the accommodating frame 12, the heat exchange piece 11 is positioned between the protecting piece 2 and the accommodating frame 12, the heat exchange flow channels 111 are arranged at the positions of the heat exchange piece 11 corresponding to each accommodating space 121, the protecting piece 2 is connected with the accommodating frame 12, the heat exchange piece 11 can be directly connected with the accommodating frame 12 or not connected with the accommodating frame 12, in the embodiment, the heat exchange piece 11 is not connected with the accommodating frame 12, and the protecting piece 2 supports the heat exchange piece 11; the case cover 13 is provided to cover the housing frame 12 for protecting the battery cells 20 therein.

When the battery cells 20 are placed in the accommodating spaces 121, the battery cells 20 are in direct contact with the heat exchange pieces 11, and the heat exchange pieces 11 are provided with heat exchange flow channels 111 at positions corresponding to the accommodating spaces 121, so that each battery cell 20 can be cooled in time.

More specifically, the accommodating frame 12 is provided with a main body frame 122 and a plurality of support beams 123 connected to inner side walls of the main body frame 122, the support beams 123 and the main body frame 122 enclose an accommodating space 121, and the shielding member 2 is connected to the main body frame 122 and the support beams 123 to improve connection stability of the shielding member 2 and the accommodating frame 12.

Furthermore, as shown in fig. 7 to 8, in combination with fig. 2, the shielding member 2 is provided with a plurality of mounting bosses 213 protruding toward the inside of the accommodating case 1, the heat exchanging member 11 is provided with a plurality of through holes 113, and the mounting bosses 213 are connected to the accommodating frame 12 through the through holes 113. Specifically, the mounting boss 213 is provided with mounting holes 213a, and bolts are respectively connected to the corresponding main body frame 122 and the support beam 123 through the mounting holes 213 a.

The shielding element 2 may be a shielding plate.

In one embodiment, as shown in fig. 6, the body 21 includes a first body 211 and a second body 212 that are connected to each other along the height direction Z of the battery case 10, the first body 211 and the support 22 are integrally formed, that is, the support 22 is a reinforcing rib on the first body 211, an energy absorbing space 4 is formed between the first body 211 and the heat exchanging channel 111, and the second body 212 is connected to the receiving case 1. The structure is suitable for the condition that the thickness of the protection piece 2 is thinner, for example, when the thickness of the protection piece 2 is t, and when t is more than or equal to 0.6mm and less than or equal to 1.2mm, the support part 22 is processed on the first body part 211 for ensuring the strength of the protection piece 2, and the support part can be specifically formed by stamping, and then the first body part 211 is connected with the second body part 212, and can be specifically formed by welding.

In another embodiment, as shown in fig. 4, the body 21 and the supporting portion 22 may be integrally formed, that is, the supporting portion 22 is a reinforcing rib on the body 21, an energy absorption space 4 is formed between the body 21 and the heat exchange flow channel 111, and the body 21 is connected with the accommodating box 1. The structure is suitable for the condition that the thickness of the protective piece 2 is thicker, for example, when t is smaller than 1.2mm and less than or equal to 2.5mm, two independent parts are not required to be arranged, the supporting part 22 and the body part 21 are integrally formed, the supporting part 22 can be integrally stamped on the body part 21, the strength requirement is ensured, the light weight is ensured to the greatest extent, and the balance of the strength and the light weight is ensured.

According to some embodiments of the present application, along the height direction Z of the battery box 10, the minimum height of the energy absorption space 4 is H2, the minimum thickness of the body portion 21 is M, and 4.ltoreq.H2M.ltoreq.10. Specifically, the value of H2/M may be 4, 5, 6, 7, 8, 9, 10, etc.

If H2/M is smaller than 4, namely H2 is too small and/or M is too large, when H2 is too small, namely the compression deformation range of the energy absorption space 4 is too small, the energy absorption effect of the energy absorption space 4 is weakened; when M is too large, i.e., the body portion 21 is too thick, in order to ensure the overall strength and rigidity of the protection member 2, the thickness of other positions of the protection member 2 needs to be increased correspondingly, which results in excessive weight of the protection member 2 and thus increases the overall weight of the battery case 10.

If H2/M > 10, i.e. H2 is too large and/or M is too small, when H2 is too large, the distance between the body portion 21 and the heat exchange flow channel 111 is too long, and when the protection member 2 is impacted by the outside, the body portion 21 cannot effectively conduct the external force to the supporting portion 22, so that the body portion 21 is easier to deform; when M is too small, the body portion 21 is too thin, resulting in a decrease in the strength and rigidity of the body portion 21, and when the protector 2 is impacted by an external force, the body portion 21 is easily deformed by the acting force, so that the protection effect of the protector 2 is weakened.

Wherein the numerical range of H2 can be more specifically 10mm and less than or equal to H2 and less than or equal to 20mm. Specifically, the value of H2 may be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, or the like.

When H2 is more than or equal to 10mm and less than or equal to 15mm, as shown in FIG. 4, the supporting part 22 and the body part 21 are integrally formed, an energy absorption space 4 is formed between the body part 21 and the heat exchange flow channel 111, and the body part 21 is connected with the accommodating box 1. In this case, since the height of the energy absorbing space 4 is small, the height required for the supporting portion 22 is small, and the supporting portion 22 does not affect the strength of the protection member 2 when being processed, for example, the pull-out time does not affect the strength of the protection member 2.

When 15mm < H2 is less than or equal to 20mm, as shown in FIG. 6, the body portion 21 includes a first body portion 211 and a second body portion 212 which are connected to each other in the height direction Z of the battery case 10, the first body portion 211 and the support portion 22 are integrally formed, an energy absorption space 4 is formed between the first body portion 211 and the heat exchange flow passage 111, and the second body portion 212 is connected to the housing case 1. That is, when the height of the energy absorbing space 4 is larger, if two separate parts are not provided, the height of the stamping supporting portion 22 is larger, the stamping supporting portion is not easy to form, the local thickness after the drawing is thinner, and the strength of the protection piece 2 is affected, so that the first body portion 211 and the supporting portion 22 are integrally formed, and then the first body portion 211 and the second body portion 212 are connected, and the two parts can be specifically formed by welding.

According to some embodiments of the present application, the present application further provides a battery 100, including battery cell 20 and battery box 10, battery box 10 is used for holding battery cell 20, battery box 10 is for the battery box 10 of any one of the above schemes, guard 2 is provided with towards holding bellied supporting part 22 in the case 1, along the direction of height Z of battery box 10, supporting part 22 and buffer 3 are used for supporting in interval 112 when guard 2 atress, and heat exchange runner 111 separates with guard 2 along the direction of height Z of battery box 10, in order to form energy-absorbing space 4, when battery box 10 bottom receives external force impact, for example, this battery box 10 installs in electric automobile bottom, when electric automobile takes place to hold in the bottom or ball to hit, supporting part 22 and buffer 3 can conduct external force to interval 112 departments, avoid external force direct action heat exchange runner 111, the risk of heat exchange runner 111 warp has been reduced, the life of battery box 10 has been improved, and then be favorable to improving the life of battery 100 that has this battery box 10, and buffer 3 can partly produce the deformation of battery box 2 when the case 2 is compressed, can produce the shock absorber 2 when the shock absorber 2 is directly when the guard 2 is taken place to the case 2, can produce the shock absorber 2, and the vibration absorber is directly when the guard 2 is held in the case 2.

According to some embodiments of the present application, there is also provided an electric device, including the battery 100 of any of the above aspects, and the battery 100 is used to provide electric energy for the electric device. The powered device may be any of the devices or systems described above that employ battery 100.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (14)

1. A battery box (10), characterized in that the battery box (10) comprises:

the heat exchange device comprises a containing box (1), wherein a heat exchange flow channel (111) is arranged on the bottom wall of the containing box (1), a spacing section (112) is further arranged on the bottom wall, and the spacing section (112) is arranged adjacent to the heat exchange flow channel (111);

a protection piece (2) connected with the accommodating box (1) and positioned below the bottom wall, wherein the protection piece (2) is provided with a body part (21) and a supporting part (22) protruding towards the inside of the accommodating box (1);

buffer part (3), follow the direction of height (Z) of battery box (10), buffer part (3) are located supporting part (22) with between interval (112), supporting part (22) with buffer part (3) are used for supporting in when guard (2) atress interval (112), just heat transfer runner (111) with body portion (21) are followed the direction of height (Z) of battery box (10) separates, in order to form energy-absorbing space (4).

2. The battery case (10) according to claim 1, wherein the buffer portion (3) is bonded to the support portion (22).

3. The battery case (10) according to claim 1, wherein a minimum thickness of the support portion (22) is K, a minimum distance between the support portion (22) and the spacer (112) is H1, and 2.ltoreq.h1/k.ltoreq.5 in a height direction (Z) of the battery case (10).

4. A battery compartment (10) according to claim 3, wherein 2 mm.ltoreq.h1.ltoreq.5 mm.

5. The battery case (10) according to claim 1, wherein the spacer (112), the supporting portion (22) and the buffer portion (3) are each provided in plurality, and each of the spacer (112) is correspondingly provided with the supporting portion (22) and the buffer portion (3).

6. The battery box (10) according to any one of claims 1-5, wherein the body portion (21) comprises a first body portion (211) and a second body portion (212) which are connected to each other in a height direction (Z) of the battery box (10), the first body portion (211) and the support portion (22) are integrally formed, the energy absorbing space (4) is formed between the first body portion (211) and the heat exchanging flow channel (111), and the second body portion (212) is connected to the housing box (1).

7. The battery case (10) according to any one of claims 1 to 5, wherein,

the body part (21) and the supporting part (22) are integrally formed, and the body part (21) is connected with the accommodating box (1).

8. The battery box (10) according to any one of claims 1-5, characterized in that the minimum height of the energy absorbing space (4) is H2, the minimum thickness of the body portion (21) is M, and 4.ltoreq.h2/m.ltoreq.10 in the height direction (Z) of the battery box (10).

9. The battery box of claim 8, wherein 10mm < H2 < 20mm.

10. The battery box (10) according to any one of claims 1-5, wherein the accommodating box (1) comprises a heat exchanging member (11) and an accommodating frame (12), the accommodating frame (12) is provided with a plurality of accommodating spaces (121) for accommodating battery cells (20), the heat exchanging member (11) is located between the protecting member (2) and the accommodating frame (12), and the protecting member (2) is connected with the accommodating frame (12);

the heat exchange flow channels (111) are arranged at positions of the heat exchange pieces (11) corresponding to the accommodating spaces (121).

11. The battery case (10) according to claim 10, wherein the accommodating frame (12) is provided with a main body frame (122) and a plurality of support beams (123) connected to inner side walls of the main body frame (122), the support beams (123) and the main body frame (122) enclosing the accommodating space (121);

the guard (2) is connected to the main body frame (122) and the support beam (123).

12. The battery box (10) according to claim 10, wherein the shielding member (2) is provided with a plurality of mounting bosses (213) protruding toward the inside of the accommodating case (1), the heat exchanging member (11) is provided with a plurality of through holes (113), and the mounting bosses (213) are connected with the accommodating frame (12) through the through holes (113).

13. A battery, the battery comprising:

the battery compartment (10) of any of claims 1-12;

and the battery unit (20) is accommodated in the accommodating box (1).

14. An electric device, characterized in that it comprises a battery (100) as claimed in claim 13.

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