CN113067081A

CN113067081A - Battery pack

Info

Publication number: CN113067081A
Application number: CN201911285927.3A
Authority: CN
Inventors: 范永斌; 王良均
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-07-02

Abstract

The invention provides a battery pack, which comprises: a housing; a plurality of electric cores electrically connected with each other; disposed within the housing; a heat absorber disposed within the housing; the heat absorber is attached to the battery cell to absorb heat of the battery cell, and the heat absorber contains a shaping body component and a phase change body component; the phase change body component can change phase to absorb the heat, and the shaping body component is used for limiting the leakage of the phase change body component from the shaping body component; the heat absorbing body is coated on the battery cell; the heat absorber is of a frame structure and is provided with a through hole for the battery core to penetrate through; the shaping body component is used for forming a porous structure or shaping the shaping body component is used for forming a capsule body, and the phase change component is used for forming a capsule core wrapped in the capsule body. The embodiment of the application provides a battery pack which is simple in manufacturing process.

Description

Battery pack

Technical Field

The present invention relates to a battery pack.

Background

The battery pack generates heat during the charge and discharge processes, thereby causing the temperature of the battery pack to increase. The battery pack has a high temperature, which affects the service life, so that the heat must be reliably conducted out in time.

The existing battery pack includes a battery cell and a phase change material covering the battery cell. The phase-change material can generate phase change in the charge and discharge process of the battery monomer, and further absorb heat released by the battery monomer. However, the phase-change material on the battery pack in the prior art is easy to leak during phase change, so that the heat absorption effect is reduced, the battery pack is polluted, and the service life of the battery pack is influenced. Therefore, the phase change material needs to be sealed during the production of the battery pack, which is complicated and costly to manufacture.

Therefore, there is a need for a battery pack that overcomes the above-mentioned drawbacks.

Disclosure of Invention

In view of this, the present disclosure provides a battery pack with a simple manufacturing process.

The above object of the present invention can be achieved by the following technical solutions: a battery pack, comprising: a housing; the battery cores are electrically connected with each other and arranged in the shell; a heat absorber disposed within the housing; the heat absorber is attached to the battery cell to absorb heat of the battery cell, and the heat absorber contains a shaping body component and a phase change body component; the phase change body component can change phase to absorb the heat, the shaping body component is used for limiting the phase change body component to be leaked from the shaping body component.

As a preferred embodiment, the heat absorbing body is coated on the battery cell.

In a preferred embodiment, the heat absorber has a frame structure and has through holes for the battery cells to pass through.

As a preferred embodiment, the heat absorbing body comprises a first supporting member and a second supporting member which are oppositely arranged; and a first groove and a second groove are respectively arranged on the opposite sides of the first supporting piece and the second supporting piece, and the first groove and the second groove are attached to the battery cell.

As a preferred embodiment, the first supporting member and the second supporting member can be spliced, so that the first groove and the second groove can enclose the through hole with a circular cross section.

As a preferred embodiment, the heat absorbing body further comprises a third supporting member disposed on a side of the second supporting member opposite to the first supporting member; a third groove and a fourth groove are respectively arranged on the opposite sides of the third supporting piece and the second supporting piece; the third groove and the fourth groove are attached to the battery core.

In a preferred embodiment, the heat absorber extends lengthwise, and the lengthwise heat absorber can be wound around the battery cell.

As a preferred embodiment, a support for fixing the battery cell is further arranged in the housing; the support is sleeved outside the battery cell.

As a preferred embodiment, there are two brackets, the two brackets are respectively sleeved at two ends of the electric core, and the heat absorber is located between the two brackets.

As a preferred embodiment, the matrix component is used to form a porous structure, and the phase change component is filled in pores of the porous structure.

As a preferred embodiment, the former component is used to form a capsule body, and the latter component is used to form a capsule core enclosed within the capsule body.

The beneficial effect of the battery package that this application provided is: the battery pack according to the embodiment of the application is provided with the battery cell and the heat absorber, wherein the battery cell can generate heat, and specifically, the battery cell generates heat in the charging and discharging processes; the heat absorber contains a shaping body component and a phase change body component; the phase change body components can change phase to absorb heat; therefore, the heat generated by the battery cell in the charging and discharging process can be absorbed by the phase change body component. Further, since the matrix composition serves to limit leakage of the phase change body composition from within the matrix composition. Therefore, the phase change body component does not leak from the shaping body component during phase change, so the battery pack in the embodiment of the application does not reduce the heat absorption effect and has long service life. And the heat absorber is a mixture of the shaping body component and the phase change body component, so that the battery pack produced by the embodiment of the application does not need additional sealing measures to seal the heat absorber, and the manufacturing process is simple. Therefore, the present embodiments provide a battery pack that is simple in manufacturing process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a front view of a battery pack according to an embodiment of the present invention;

fig. 2 is a side view of a battery pack according to an embodiment of the present invention;

fig. 3 is a partial schematic view of a battery pack according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery pack according to another embodiment of the present invention;

fig. 5 is an exploded view of a battery pack provided in the embodiment of fig. 4;

fig. 6 is a schematic view of a heat absorber according to an embodiment of the present invention.

Description of reference numerals:

11. an electric core; 13. a heat absorbing body; 15. a housing; 17. sealing the chamber; 19. a top wall; 21. a bottom wall; 23. a side wall; 25. a support; 27. a first bracket; 29. a second bracket; 31. a base; 33. a cover body; 37. a first support member; 39. a second support member; 41. a first groove; 43. a second groove; 45. a third support member; 47. a third groove; 49. a through hole; 51. a first boss portion; 53. a second boss portion; 55. a third boss portion; 57. a fourth groove; 59. and a fourth boss.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1 to 5. An embodiment of the present application provides a battery pack, which includes: a housing 15; a plurality of cells 11 electrically connected to each other; disposed within the housing 15; a heat absorber 13 disposed within the housing 15; the heat absorber 13 is attached to the battery cell 11 to absorb heat of the battery cell, and the heat absorber 13 contains a shaping body component and a phase change body component; the phase change body component can change phase to absorb the heat, the shaping body component is used for limiting the phase change body component to be leaked from the shaping body component.

The technical scheme shows that: the battery pack according to the embodiment of the application is provided with the battery cell 11 and the heat absorber 13, wherein the battery cell 11 can generate heat, and specifically, the battery cell 11 generates heat in the charging and discharging processes; the heat absorbing body 13 contains a shaping body component and a phase change body component; the phase change body components can change phase to absorb heat; thus, the heat generated by the battery cell 11 during the charging and discharging process can be absorbed by the phase change material. Further, since the matrix composition serves to limit leakage of the phase change body composition from within the matrix composition. Therefore, the phase change body component does not leak from the shaping body component during phase change, so the battery pack in the embodiment of the application does not reduce the heat absorption effect and has long service life. And since the heat absorber 13 is a mixture of the shaping body component and the phase change body component, no additional sealing means is required to seal the heat absorber 13 in the production of the battery pack according to the embodiment of the present application, and thus the manufacturing process is simple.

In the present embodiment, the casing 15 has a hollow rectangular shape as a whole. Of course, the housing 15 is not limited to a rectangular shape, and may have other shapes, such as a columnar shape. The hollow portion forms a sealed chamber 17. Specifically, as shown in fig. 1, the housing 15 includes a bottom wall 21 and a top wall 19 disposed opposite to each other, and a side wall 23 enclosed between the bottom wall 21 and the top wall 19. The bottom wall 21, the top wall 19 and the side wall 23 enclose a sealed chamber 17 therebetween. At least one cell 11 and a heat absorber 13 are both disposed within the housing 15. I.e. at least one cell 11 and the heat absorber 13 are both located within the sealed chamber 17.

In the present embodiment, as shown in fig. 1, the cell 11 has a cylindrical shape extending in the longitudinal direction as a whole. For example, as shown in fig. 1, the cell 11 extends in the left-right direction. Of course, the battery cell 11 is not limited to a cylindrical shape, and may have other shapes, for example, the battery cell 11 may have a rectangular parallelepiped shape. The number of the battery cells 11 is several. That is, the number of the battery cells 11 is at least one. That is, the number of the battery cells 11 may be 1. Or the battery cell 11 may be plural. No provision is made for this application. The number of cells 11 may be 2, 3, 4, 5, etc. And the plurality of battery cells 11 are electrically connected to each other. Further, each of the battery cells 11 may specifically be a battery cell. For example, each cell 11 is a battery cell. The battery cell can be charged and/or discharged. The cell 11 can generate heat. Specifically, heat is released to the outside during the charging and/or discharging of the battery cell 11, so that the battery cell 11 can generate heat. For example, the battery cells can release heat during charging and/or discharging, so that the battery cells can generate heat.

In the present embodiment, the heat absorber 13 is attached to the battery cell 11 to absorb heat thereof. Specifically, the heat absorbing body 13 may cover one side of the battery cell 11, so that the heat absorbing body 13 can be attached to one side of the battery cell 11. Of course, the heat absorbing body 13 is not limited to be covered on one side of the battery cell 11, and may be covered on the battery cell 11, so that the heat absorbing body 13 can be attached to the battery cell 11 along the circumferential direction.

Further, the heat absorber 13 is coated on the battery cell 11. As shown in fig. 3 and 4, the heat absorber 13 is wrapped on the outer wall of the battery cell 11, so that the heat absorber 13 can be attached to the outer peripheral wall of the battery cell 11. The contact area between the heat absorbing body 13 and the cell 11 is thus increased, so that the speed of absorbing heat from the cell 11 can be increased.

In one embodiment, the heat absorber 13 extends lengthwise. And the longitudinally extending heat absorbing body 13 can be wound around the cell 11. That is, as shown in fig. 3, the heat absorbing body 13 is wound around each cell 11 in the circumferential direction. Therefore, the heat absorbing body 13 and the battery cell 11 can be combined and wrapped at will to form battery packs in different states.

In one embodiment, as shown in fig. 4, the heat absorber 13 is in a frame structure. That is, the heat absorber 13 is an integral frame. Further, the heat absorbing body 13 can be made into an integral frame by integral molding. Further, the heat absorber 13 has a through hole 49 through which the cell 11 is inserted. That is, the entire frame is formed with a through hole 49. The through hole 49 is used for receiving the battery cell 11, so that the battery cell 11 can be inserted into the through hole 49. Therefore, on one hand, the heat absorbing body 13 is coated on the battery cell 11, and on the other hand, the battery cell 11 can be fixed and supported by the integral frame, so that the battery cell 11 is prevented from moving in the shell 15. Further, the number of the through holes 49 is plural. The plurality may be 2, 3, 4, 5, etc. Further, a plurality of through holes 49 correspond to the plurality of battery cells 11. Each through hole 49 is used for the corresponding battery cell 11 to penetrate through. The correspondence may be such that the number of through holes 49 is equal to the number of cells 11. For example, as shown in fig. 4, specifically, the plurality may be 2, 3, 4, 5, or the like. No provision is made for this application. The number of the battery cells 11 is 10. The number of the through holes 49 is also 10. Each through hole 49 is used for the corresponding battery cell 11 to penetrate through. So that each of the cells 11 is inserted into the through hole 49. That is, each cell 11 absorbs heat through the hole wall of its corresponding through hole 49.

In one embodiment, the heat absorber 13 includes a first support 37 and a second support 39 disposed opposite each other. As shown, for example, in fig. 5, the first support 37 is positioned above the second support 39. First and second grooves 41 and 43 are provided on opposite sides of the first and

second supports

37 and 39, respectively. As shown in fig. 5, for example, a first groove 41 opened downward is provided on the lower side of the first support 37. The second supporter 39 is provided on an upper side thereof with a second groove 43 opened upward. The first groove 41 and the second groove 43 are attached to the battery cell 11, so that the battery cell 11 can dissipate heat quickly.

Preferably, the first support 37 and the second support 39 can be spliced together, so that the first groove 41 and the second groove 43 can enclose a through hole 49 with a circular cross-sectional area. For example, as shown in fig. 5, the first support 37 and the second support 39 can be vertically spliced, so that the first groove 41 and the second groove 43 can be vertically enclosed to form a through hole 49.

Further, the first groove 41 and the second groove 43 are both arc grooves. And the radius of first groove 41 is equal to the radius of second groove 43. So that the first groove 41 and the second groove 43 can be butted to form a through hole 49 having a circular cross section.

Preferably, the radius of the first groove 41 and the radius of the second groove 43 are both equal to the radius of the battery cell 11. When the battery cell 11 is inserted into the through hole 49, the outer peripheral wall of the battery cell 11 can be attached to the inner peripheral wall of the through hole 49, and the contact area between the battery cell 11 and the heat absorber 13 is large, so as to further enable the battery cell 11 to dissipate heat quickly.

Further, the first groove 41 and the second groove 43 are plural. The plurality of first grooves 41 and the plurality of second grooves 43 correspond. Each first recess 41 is directly opposite a corresponding second recess 43. The plurality may be 2, 3, 4, 5, etc. For example, as shown in fig. 5, each of the first grooves 41 and the second grooves 43 is 5. So that each first groove 41 and the corresponding second groove 43 form a through hole 49 when the first support 37 and the second support 39 are spliced. Further, as shown in fig. 5, the extending directions of the plurality of first grooves 41 are uniform. The extending directions of the plurality of second grooves 43 are identical.

Further, the heat absorbing body 13 further comprises a third supporting member 45 disposed on a side of the second supporting member 39 opposite to the first supporting member 37. As shown for example in fig. 5, the heat absorbing body 13 further comprises a third support 45 located on the lower side of the second support 39. Third and

fourth grooves

47 and 57 are provided on opposite sides of the third and

second supports

45 and 39, respectively. As shown in fig. 5, for example, a fourth groove 57 opened downward is provided on the lower side of the second support 39. The third supporter 45 is provided on an upper side thereof with a third groove 47 opened upward. The third groove 47 and the fourth groove 57 are attached to the battery cell 11, so that the battery cell 11 can dissipate heat quickly.

Preferably, the second support member 39 can be spliced with the third support member 45 so that the third groove 47 and the fourth groove 57 can form a through hole 49 having a circular cross-sectional area. For example, as shown in fig. 5, the second support member 39 and the third support member 45 can be joined in the up-down direction, so that the third groove 47 and the fourth groove 57 can be enclosed in the up-down direction to form the through hole 49.

Further, the third groove 47 and the fourth groove 57 are both arc grooves. And the radius of third groove 47 is equal to the radius of fourth groove 57. Thereby enabling the third groove 47 and the fourth groove 57 to abut to form a through hole 49 having a circular cross section.

Preferably, the radius of the third groove 47 and the radius of the fourth groove 57 are both equal to the radius of the battery cell 11. When the battery cell 11 is inserted into the through hole 49, the outer peripheral wall of the battery cell 11 can be attached to the inner peripheral wall of the through hole 49, and the contact area between the battery cell 11 and the heat absorber 13 is large, so as to further enable the battery cell 11 to dissipate heat quickly.

Further, each of the third groove 47 and the fourth groove 57 is plural. The plurality of third grooves 47 corresponds to the plurality of fourth grooves 57. Each third recess 47 is directly opposite a corresponding fourth recess 57. The plurality may be 2, 3, 4, 5, etc. For example, as shown in fig. 5, each of the third grooves 47 and the fourth grooves 57 is 5. So that each third recess 47 forms a through hole 49 with a corresponding fourth recess 57 when the second support 39 and the third support 45 are spliced together. Further, as shown in fig. 5, the extending directions of the plurality of third grooves 47 are identical. The extending directions of the plurality of fourth grooves 57 are identical.

In one embodiment, the first support 37 is a first plate. I.e. the first support 37 is of plate-like construction. The first plate body is provided on a surface thereof with a plurality of first protrusions 51 protruding outward. The first grooves 41 are formed between adjacent first protrusions 51. As shown in fig. 5, for example, a plurality of first protrusions 51 protruding downward are provided on the lower surface of the first plate body. First grooves 41 opened downward are formed between adjacent first protrusions 51.

In one embodiment, the second support 39 is a second plate. I.e. the second support 39 is of plate-like construction. A plurality of second protrusions 53 protruding outward are provided on a surface of the second plate body. The second grooves 43 are formed between the adjacent second protrusions 53. As shown in fig. 5, for example, a plurality of second protrusions 53 protruding upward are provided on the upper surface of the second plate body. The second grooves 43 opened upward are formed between the adjacent second protrusions 53.

Further, a plurality of fourth protrusions 59 protruding outward are disposed on a surface of the second plate body facing away from the second protrusions 53. Fourth grooves 57 are formed between adjacent fourth convex portions 59. As shown in fig. 5, for example, a plurality of fourth protrusions 59 protruding downward are provided on the lower surface of the second plate body. Fourth grooves 57 opened downward are formed between adjacent fourth protrusions 59.

In one embodiment, the third support 45 is a third plate. I.e. the third support 45 is of plate-like construction. A plurality of third protrusions 55 protruding outward are provided on a surface of the third plate body. Third grooves 47 are formed between adjacent third protrusions 55. As shown in fig. 5, for example, a plurality of third protrusions 55 protruding upward are provided on the upper surface of the third plate body. Third grooves 47 opened upward are formed between adjacent third protrusions 55.

In one embodiment, as shown in fig. 1, when the heat absorbing body 13 extending in the longitudinal direction is wound around the battery cell 11, a bracket 25 for fixing the battery cell 11 is further provided in the housing 15. I.e. the sealed chamber 17, is also provided with a bracket 25. Therefore, the heat absorber 13 and the battery cell 11 are encapsulated by arranging the shell 15, and the battery cell 11 is fixed by the bracket 25, so that the heat absorber 13 and the battery cell 11 are protected.

Specifically, the bracket 25 is sleeved outside the battery cell 11. I.e. the holder 25 is hollow and tubular. The hollow portion forms a through passage. The battery cell 11 is disposed through the through channel. The through passage penetrates the holder 25 in the left-right direction, as shown in fig. 1, for example. The cell 11 extends in the left-right direction. The battery cell 11 is arranged in the through channel in a left-right direction.

Further, the number of the brackets 25 is two. For example, the bracket 25 may include a first bracket 27 and a second bracket 29. The two brackets 25 are respectively sleeved at two ends of the battery cell 11. For example, the first bracket 27 may be sleeved on the left end of the battery cell 11. The second bracket 29 is sleeved at the right end of the battery cell 11. The heat absorber 13 is located between the two supports 25. I.e. the heat absorbing body 13 is located between the first holder 27 and the second holder 29.

In the present embodiment, the heat absorber 13 contains a former component and a phase-change component. I.e. the heat absorber 13 is a mixture. Wherein the phase change body composition is capable of undergoing a phase change to absorb heat. A phase change may be the process by which a substance changes from one phase to another. The homogeneous part of a substance with identical physical and chemical properties and distinct interfaces with other parts is called a phase. Corresponding to the three states of solid, liquid and gas, the substance includes solid phase, liquid phase and gas phase. Such a phase change may be a solid phase to a liquid phase. The phase change may also be a solid phase to a gas phase. The phase change may also be a liquid phase to a gas phase. The phase change may also be a change from a gas phase to a solid phase, which is not specified in this application. Further, the phase change body component may be Organic (Organic) and Inorganic (Inorganic) phase change materials. They can also be divided into Hydrated Salts (Hydrated Salts) phase change materials and waxy (Paraffin Wax) phase change materials. Specifically, the inorganic phase change material mainly includes crystalline hydrated salts, molten salts, metals or alloys, and the like; the organic phase change material mainly comprises paraffin, acetic acid and other organic matters. Further, the phase change body composition can absorb heat at the time of phase change, thereby enabling the temperature of the battery cell 11 to be lowered. For example, when the phase change material is water, the water changes from a liquid state to a solid state (freezes) when the temperature is as low as 0 ℃. Water changes from solid to liquid (dissolves) when the temperature is above 0 ℃. A large amount of cold energy is absorbed and stored during the freezing process, while a large amount of heat energy is absorbed during the dissolution process. Further, the matrix composition serves to limit leakage of the phase change body composition from within the matrix composition. In particular, the former component can accommodate the phase-change component. And when the phase change body component changes phase, the volume of the shaping body component is kept unchanged, so that when the phase change body component changes phase, the shaping body component can still encapsulate the phase change body component, and further the phase change body component is prevented from leaking from the inside of the shaping body component. Therefore, the phase change body component does not leak from the shaping body component during phase change, so the battery pack in the embodiment of the application does not reduce the heat absorption effect and has long service life. And because the heat absorbing body 13 is a mixture of the shaping body component and the phase change body component, the heat absorbing body 13 is sealed without extra sealing measures when the battery pack according to the embodiment of the application is produced, so that the manufacturing process is simple, and the safety and the reliability are realized.

In one embodiment, as shown in fig. 6, a matrix component is used to form the porous structure. The phase change body component is filled in the pores of the porous structure. The porous structure can thus encapsulate the phase change body component to limit leakage of the phase change body component from within the pores of the porous structure. Specifically, when the phase change body component changes phase, the volume of the porous structure is maintained unchanged, so that the phase change body component can be accommodated in the pores of the porous structure after phase change. The porous structure can still encapsulate the phase change body component, thereby avoiding the phase change body component from leaking from the pores of the porous structure. Specifically, the matrix component may be, for example, aluminum foam, copper foam, or the like. The phase change component may be water, for example. Of course, the qualitative body component is not limited to foamed aluminum, foamed copper and the like, and can be other phase-change components; such as foamed plastic, etc., and this application does not intend to be limited thereto. Further, the phase change body component is not limited to water, but may be other phase change materials added according to different phase change points, which is not specified in this application. Further, because the foamed aluminum and the foamed copper have strong thermal conductivity, when the fixed body component is the foamed aluminum and the foamed copper, the heat of the battery cell can be quickly transferred to the phase change body component through the fixed body component, and thus the heat dissipation performance of the heat absorbing body is improved. Furthermore, when the heat absorber is manufactured, the qualitative body component can be firstly placed in a mould, and after the qualitative body component is formed, the phase change body is poured on the shape-fixed body component, so that the phase change body component can be filled into the porous structure formed by the shape-fixed body component.

In another embodiment, the matrix composition is used to form a balloon. The phase change composition is used to form a core that is wrapped around the capsule body. Specifically, the qualitative bulk component may be first mixed with the phase change bulk component to form a mixture. Then granulating the mixture to enable the particles of the phase change body component to be coated on the particles of the shaping body component; and the particles of the shaping body component surround the particles of the phase change component, so that the capsule body can wrap the capsule core to limit the leakage of the capsule core from the capsule body when the capsule core is subjected to phase change. Further, the qualitative body component is 50% to 70% by weight of the endothermic body. The phase change body component is present in an amount of 30% to 50% by weight of the heat sink. The molding material component may be a plastic material such as HDPE (High Density Polyethylene), PA (Polyamide, nylon, Polyamide), PP (polypropylene), or the like. The phase change component may be water, for example. Of course, the phase change material composition is not limited to water, and may be other phase change materials added according to different phase change points, which is not specified in this application.

In one embodiment, the housing 15 includes a base 31 and a cover 33, and the base 31 is engaged with the cover 33. Therefore, the shell 15 can be conveniently detached and mounted through clamping between the base 31 and the cover 33, and the production process of the battery pack in the embodiment of the application is simple.

Further, the longitudinal direction of the casing 15 is perpendicular to the longitudinal direction of the battery cell 11. For example, as shown in fig. 2, the longitudinal direction of the housing 15 extends in the plane of the paper. Specifically, for example, as shown in fig. 2, the longitudinal direction of the housing 15 extends in the left-right direction in the paper. The longitudinal direction of the cell 11 extends perpendicular to the paper.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A battery pack, comprising:

a housing;

the battery cores are electrically connected with each other and arranged in the shell;

a heat absorber disposed within the housing; the heat absorber is attached to the battery cell to absorb heat of the battery cell, and the heat absorber contains a shaping body component and a phase change body component; the phase change body component can change phase to absorb the heat, the shaping body component is used for limiting the phase change body component to be leaked from the shaping body component.

2. The battery pack according to claim 1, wherein: the heat absorbing body is coated on the battery cell.

3. The battery pack according to claim 2, wherein: the heat absorption body is of a frame structure and is provided with a through hole for the electric core to penetrate through.

4. The battery pack according to claim 1, wherein: the heat absorbing body comprises a first supporting piece and a second supporting piece which are oppositely arranged; and a first groove and a second groove are respectively arranged on the opposite sides of the first supporting piece and the second supporting piece, and the first groove and the second groove are attached to the battery cell.

5. The battery pack according to claim 4, wherein: the first groove and the second groove are both arc grooves; and the radius of the first groove and the radius of the second groove are both equal to the radius of the battery core.

6. The battery pack according to claim 4, wherein: the heat absorbing body further comprises a third supporting piece arranged on one side of the second supporting piece opposite to the first supporting piece; a third groove and a fourth groove are respectively arranged on the opposite sides of the third supporting piece and the second supporting piece; the third groove and the fourth groove are attached to the battery core.

7. The battery pack according to claim 2, wherein: the heat absorber body extends lengthwise, and the lengthwise extending heat absorber body can be wound on the battery cell.

8. The battery pack of claim 7, wherein a bracket for fixing the battery cell is further disposed in the housing; the support is sleeved outside the battery cell.

9. The battery pack according to claim 8, wherein: the two supports are respectively sleeved at two ends of the battery cell, and the heat absorber is located between the two supports.

10. The battery pack according to claim 1, wherein the matrix component is used to form a porous structure, and the phase-change body component is filled in pores of the porous structure.

11. The battery pack according to claim 1, wherein: the shaping body component is used for forming a capsule body, and the phase change body component is used for forming a capsule core wrapped on the capsule body.