Self-heating battery pack

Abstract

The self-heating battery pack comprises a shell, at least one battery cell, heating pieces and a top cover assembly, the battery cells and the heating pieces are arranged in the shell, the top cover assembly covers the open end of the shell, the number of the battery cells is at least one, at least one heating piece is correspondingly arranged on at least one side of each battery cell, and the top cover assembly covers the open end of the shell. The top cover assembly comprises a top cover piece, and a positive pole part, a negative pole part, a first heating part and a second heating part which are arranged on the top cover piece, the positive pole part comprises a positive pole column penetrating through the top cover piece, the negative pole part comprises a negative pole column penetrating through the top cover piece, the first heating part comprises a first heating pole column penetrating through the top cover piece, and the second heating part comprises a second heating pole column penetrating through the top cover piece. The second heating part comprises a second heating pole column penetrating through the top cover piece, the ends, extending into the shell, of the positive pole column and the negative pole column are connected with the battery cells, and the ends, extending into the shell, of the first heating pole column and the second heating pole column are connected with the heating pieces. According to the embodiment of the invention, the battery cell in the shell is uniformly heated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a self-heating battery pack. BACKGROUND

[0002] Low temperature has a great impact on the battery pack, which is easy to cause the performance degradation of the battery. In order to solve the problem caused by low temperature to the battery pack, the prior art integrates a heating device on the power battery pack to heat the whole battery pack. However, the battery pack includes a plurality of battery cells, and the battery cells far away from the heating device are heated slowly, and the heating effect of the whole battery pack is poor. The whole battery pack is unevenly heated, which causes the temperature in the battery pack to be uneven, and these still have a certain influence on the performance of the battery pack. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a self-heating battery pack to solve the problem of uneven heating of the whole battery pack in the prior art, which affects the performance of the battery pack.

[0004] The purpose of the present application can be achieved by the following technical solutions:

[0005] The present application provides a self-heating battery pack, the self-heating battery pack includes a shell, battery cells, heating sheets and a top cover assembly, the battery cells and the heating sheets are arranged in the shell, and the top cover assembly is arranged at the open end of the shell, wherein the battery cells are at least one, at least one side of each battery cell corresponds to a heating sheet, the top cover assembly includes a top cover sheet, a positive electrode part, a negative electrode part, a first heating part and a second heating part arranged on the top cover sheet, the positive electrode part includes a positive electrode column penetrating through the top cover sheet, the negative electrode part includes a negative electrode column penetrating through the top cover sheet, the first heating part includes a first heating electrode column penetrating through the top cover sheet, and the second heating part includes a second heating electrode column penetrating through the top cover sheet, and one end of the positive electrode column and the negative electrode column extending into the shell is connected with each battery cell, and one end of the first heating electrode column and the second heating electrode column extending into the shell is connected with each heating sheet.

[0006] By arranging a heating sheet on at least one side of each battery cell, and connecting each heating sheet with the first heating electrode column and the second heating electrode column, an external power supply module can be connected with each heating sheet through the first heating electrode column and the second heating electrode column to supply power to each heating sheet, and each heating sheet can heat each battery cell synchronously to make each battery cell evenly heated and avoid affecting the overall performance of the battery pack.

[0007] Optionally, one heating sheet is arranged on each of the opposite sides of each battery cell.

[0008] By arranging a heating sheet on each of the opposite sides of each battery cell, each battery cell can be synchronously heated on both sides to improve the uniformity of heating at different positions of the same battery cell.

[0009] Optionally, the battery cell is provided with a plurality of battery cells, and only one heating sheet is arranged between adjacent battery cells.

[0010] By arranging a plurality of battery cells and arranging a heating sheet on each of the opposite sides of the battery cells, only one heating sheet is arranged between adjacent battery cells, so that the plurality of battery cells are evenly heated.

[0011] Optionally, the first connecting piece and the second connecting piece are arranged on each heating sheet, the first heating component further comprises a first heating adapter piece, the second heating component further comprises a second heating adapter piece, the first connecting piece on each heating sheet is connected with the first heating pole through the first heating adapter piece, and the second connecting piece on each heating sheet is connected with the second heating pole through the second heating adapter piece.

[0012] A specific structure mode of connecting the first heating pole and the second heating pole with each heating sheet is provided, which is simple in structure and convenient to manufacture.

[0013] Optionally, the first connecting piece on each heating sheet is welded with the first heating adapter piece, and the second connecting piece on each heating sheet is welded with the second heating adapter piece.

[0014] A specific connection mode between the first connecting piece and the first heating adapter piece and between the second connecting piece and the second heating adapter piece is provided to ensure the reliability of the connection between the structures.

[0015] Optionally, the first heating adapter piece is welded with the end face of the first heating pole, and the second heating adapter piece is welded with the end face of the second heating pole.

[0016] A specific connection mode between the first heating adapter piece and the first heating pole and between the second heating adapter piece and the second heating pole is provided, which is reliable in connection and convenient to install.

[0017] Optionally, the positive electrode component, the negative electrode component, the first heating component and the second heating component each further comprise a lower plastic body, a sealing ring, an insulating ring, a stainless steel ring and an upper plastic body which are sequentially penetrated by the corresponding pole, the bottom of the pole is clamped and fixed on the lower plastic body, the top of the pole is clamped and fixed in the stainless steel ring, the sealing ring is arranged between the pole and the top cover sheet, the insulating ring is arranged between the stainless steel ring and the top cover sheet, the upper plastic body is wrapped outside the top of the pole, the insulating ring and the stainless steel ring, and one end of the pole clamped on the lower plastic body is connected with the connecting piece on the heating sheet through the adapter piece.

[0018] By arranging the lower plastic body, the sealing ring, the insulating ring, the stainless steel ring and the upper plastic body, each pole is sealed and installed on the top cover sheet and insulatedly connected with the top cover sheet.

[0019] Optionally, the lower plastic body of the positive electrode component, the negative electrode component, the first heating component and the second heating component are integrally formed into a stopper clip, the stopper clip is pressed between the top cover sheet and the battery cell, and the stopper clip is used to prevent the battery cell from shaking in the shell.

[0020] By arranging the stopper clip, the battery cell is effectively prevented from shaking in the shell, and the battery cell and the top cover sheet are insulated and connected.

[0021] Optionally, the top cover sheet is further provided with an insulating sheet on the upper surface away from the shell, and the positive pole, the negative pole, the first heating pole and the second heating pole respectively penetrate the insulating sheet.

[0022] By arranging the insulating sheet, the poles are effectively isolated, and the battery pack is prevented from short-circuiting.

[0023] Optionally, the self-heating battery pack further comprises a power supply module, and the first heating pole and the second heating pole respectively extend out of the shell and are connected to the positive / negative pole of the power supply module, and the power supply module is used to supply power to the heating sheet.

[0024] By arranging the power supply module to supply power to the heating sheet, the heating temperature of the heating sheet is adjusted, which helps to quickly heat the battery cell in extremely cold conditions. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described below with reference to the drawings.

[0026] Figure 1 is a perspective view of a self-heating battery pack in one embodiment of the application;

[0027] Figure 2 is an exploded view of a self-heating battery pack in one embodiment of the application;

[0028] Figure 3 is a structural schematic view of the assembly of the stopper clip and the adapter sheet in one embodiment of the application.

[0029] MARKING OF THE DRAWINGS:

[0030] 1, shell; 2, battery cell; 21, positive pole lug; 22, negative pole lug; 3, heating sheet; 4, top cover assembly; 41, top cover sheet; 42, positive pole; 43, negative pole; 44, first heating pole; 45, second heating pole; 46, first heating adapter sheet; 47, second heating adapter sheet; 48, positive adapter sheet; 49, negative adapter sheet; 50, lower plastic body; 51, sealing ring; 52, insulating ring; 53, stainless steel ring; 54, upper plastic body; 55, clamping hole; 56, stopper clip; 57, accommodating groove; 6, first connecting sheet; 7, second connecting sheet; 8, insulating sheet. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Please refer to Figure 1 and Figure 2 In some embodiments, the present application provides a self-heating battery pack, which comprises a shell 1, a battery cell 2, a heating sheet 3 and a top cover assembly 4. The battery cell 2 and the heating sheet 3 are both arranged in the shell 1, and the top cover assembly 4 is arranged on the open end of the shell 1. At least one battery cell 2 is arranged, and at least one heating sheet 3 is arranged on each side of the battery cell 2. The top cover assembly 4 comprises a top cover sheet 41, and a positive electrode part, a negative electrode part, a first heating part and a second heating part arranged on the top cover sheet 41. The top cover sheet 41 is mounted on the opening of the shell 1 to seal the opening. The positive electrode part comprises a positive electrode column 42 penetrating through the top cover sheet 41, the negative electrode part comprises a negative electrode column 43 penetrating through the top cover sheet 41, the first heating part comprises a first heating electrode column 44 penetrating through the top cover sheet 41, and the second heating part comprises a second heating electrode column 45 penetrating through the top cover sheet 41. The positive electrode column 42 and the negative electrode column 43 are both connected to the battery cell 2 at one end extending into the shell 1, and the first heating electrode column 44 and the second heating electrode column 45 are both connected to the heating sheet 3 at one end extending into the shell 1.

[0033] In the present application, the positive electrode column 42 and the negative electrode column 43 can connect the battery cell 2 with an external circuit, so that the current in the battery cell 2 is output to the external circuit through the positive electrode column 42 and is input from the negative electrode column 43, forming a complete loop.

[0034] And at least one heating sheet 3 is arranged on each side of the battery cell 2, and each heating sheet 3 is connected to the first heating electrode column 44 and the second heating electrode column 45, so that an external power supply module can be connected to each heating sheet 3 through the first heating electrode column 44 and the second heating electrode column 45 to supply power to each heating sheet 3, and each heating sheet 3 can heat each battery cell 2 synchronously to make each battery cell 2 evenly heated and avoid affecting the overall performance of the battery pack.

[0035] In some embodiments, one heating sheet 3 is arranged on each of the opposite sides of each battery cell 2, so that the two sides of the battery cell 2 are heated synchronously to improve the uniformity of the heating at different positions of the same battery cell 2.

[0036] In some embodiments, a plurality of battery cells 2 are arranged, each battery cell 2 is arranged along a straight line direction or in a matrix, one heating sheet 3 is arranged on each of the opposite sides of each battery cell 2, and only one heating sheet 3 is arranged between adjacent battery cells 2, so that the plurality of battery cells 2 are evenly heated.

[0037] In some embodiments, the shell 1 is made of aluminum.

[0038] In some embodiments, the first and second connecting pieces 6 and 7 are arranged on each heating sheet 3. The first heating component further comprises a first heating adapter piece 46, and the second heating component further comprises a second heating adapter piece 47. The first connecting piece 6 on each heating sheet 3 is connected to the first heating pole 44 through the first heating adapter piece 46, and the second connecting piece 7 on each heating sheet 3 is connected to the second heating pole 45 through the second heating adapter piece 47. Thus, the power supply module supplies power to each heating sheet 3.

[0039] Further, the first and second heating adapter pieces 46 and 47 each have opposite upper and lower surfaces. The first and second heating poles 44 and 45 each have opposite upper and lower ends, with the upper end extending outside the shell 1 and the lower end extending inside the shell 1. The first connecting piece 6 on each heating sheet 3 is welded to the lower surface of the first heating adapter piece 46, and the upper surface of the first heating adapter piece 46 is welded to the lower end surface of the first heating pole 44. The second connecting piece 7 on each heating sheet 3 is welded to the lower surface of the second heating adapter piece 47, and the upper surface of the second heating adapter piece 47 is welded to the lower end surface of the second heating pole 45, so that the first and second heating poles 44 and 45 are firmly connected to each heating sheet 3.

[0040] In some embodiments, the top cover assembly 4 further comprises a positive adapter piece 48 and a negative adapter piece 49. Each battery cell 2 is provided with a positive tab 21 and a negative tab 22. The positive tab 21 of each battery cell 2 is connected to the positive pole 42 through the positive adapter piece 48, and the negative tab 22 of each battery cell 2 is connected to the negative pole 43 through the negative adapter piece 49, so that each battery cell 2 outputs current through the positive electrode and inputs through the negative electrode.

[0041] Further, the positive and negative adapter pieces 48 and 49 each have opposite upper and lower surfaces. The positive and negative poles 42 and 43 each have opposite upper and lower ends, with the upper end located outside the shell 1 and the lower end extending inside the shell 1. The positive tab 21 of each battery cell 2 is welded to the lower surface of the positive adapter piece 48, and the upper surface of the positive adapter piece 48 is welded to the bottom end surface of the positive pole 42. The negative tab 22 of each battery cell 2 is welded to the lower surface of the negative adapter piece 49, and the upper surface of the negative adapter piece 49 is welded to the lower end surface of the negative pole 43, so that the positive and negative tabs 21 and 22 are firmly connected to each battery cell 2.

[0042] Please refer to Figure 2 and Figure 3As shown, in some embodiments, the positive electrode component, the negative electrode component, the first heating component and the second heating component each further comprise a lower plastic body 50, a sealing ring 51, an insulating ring 52, a stainless steel ring and an upper plastic body 54, which are sequentially penetrated by the corresponding pole. The bottom of the pole is clamped and fixed on the lower plastic body 50. The top of the pole is clamped and fixed in the stainless steel ring. The sealing ring 51 is arranged between the pole and the top cover sheet 41, and the insulating ring 52 is arranged between the stainless steel ring and the top cover sheet 41. The upper plastic body 54 covers the outside of the top of the pole, the insulating ring 52 and the stainless steel ring, and the end of the pole clamped on the lower plastic body 50 is connected to the connecting piece on the heating sheet 3 through the adapter piece.

[0043] Specifically, the lower plastic body 50 is provided with a clamping hole 55 matched with each pole, and the bottom of each pole is clamped in the corresponding clamping hole 55, and the lower end surface of each pole is welded with the corresponding adapter piece through the clamping hole 55. The bottom of the pole has a first skirt, and the sealing ring 51 is sleeved on the pole and is pressed between the first skirt and the lower surface of the top cover sheet 41, so that the pole and the top cover sheet 41 are sealingly connected. The stainless steel ring is fixedly sleeved on the top of the pole, and the stainless steel ring extends radially out of the clamping hole 55 along the clamping hole 55, so that the pole can be lapped on the upper surface of the top cover sheet 41 through the stainless steel ring, and the insulating ring 52 is arranged to insulate the stainless steel ring and the top cover sheet 41, avoiding mutual conduction between them. The lower plastic body 50 is generally in the shape of a ring cap, which wraps the top of the pole, the insulating ring 52 and the outside of the stainless steel ring, but leaves the top end surface of the pole exposed for external connection, so as to improve the appearance of the structure. Through the above arrangement, each pole is sealingly installed on the top cover sheet 41 and is insulatively connected with the top cover sheet 41.

[0044] It can be understood that the corresponding poles of the above-mentioned positive electrode component, negative electrode component, first heating component and second heating component are respectively the positive pole 42, negative pole 43, first heating pole 44 and second heating pole 45. The corresponding adapter pieces are the positive adapter piece 48 corresponding to the positive pole 42, the negative adapter piece 49 corresponding to the negative pole 43, the first heating adapter piece 46 corresponding to the first heating pole 44 and the second heating adapter piece 47 corresponding to the second heating pole 45.

[0045] Please refer to Figure 2 and Figure 3 As shown, further, the lower plastic body 50 in the positive electrode component, the negative electrode component, the first heating component and the second heating component is integrally formed to form a stopper clip 56. The stopper clip 56 is pressed between each battery cell 2 and the top cover sheet 41, effectively preventing each battery cell 2 from shaking in the shell 1, and can insulate the battery cell 2 and the top cover sheet 41. The lower surface of the stopper clip 56 is provided with a receiving groove 57 for accommodating the connection structure between each pole and the heating sheet 3 and the battery cell 2.

[0046] In some embodiments, the top cover sheet 41 is further provided with an insulating sheet 8 on the upper surface of the shell 1, and the positive pole 42, the negative pole 43, the first heating pole 44 and the second heating pole 45 respectively penetrate the insulating sheet 8. The insulating sheet 8 can effectively isolate the poles to prevent the battery pack from short-circuiting.

[0047] In some embodiments, the self-heating battery pack further comprises a power supply module (not shown) arranged outside the shell 1, and the positive / negative poles of the power supply module are connected to the ends of the first heating pole 44 and the second heating pole 45, respectively, which extend out of the shell 1, to form a loop with the heating sheets 3 to supply power to the heating sheets 3, so that the heating sheets 3 can be heated synchronously, and the heating temperature of the heating sheets 3 can be adjusted, which helps to quickly heat the battery cells 2 in extremely cold conditions. The power supply module is of a known structure and will not be described in detail here.

[0048] The above describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still be included in the scope of the present application.

[0049] It should be noted that the terms "first", "second", and the like used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. The description of the present application with respect to "left", "right", "left side", "right side", "upper", "lower", "top", "bottom" and the like is defined based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the structure must be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined and limited.

[0050] In the description of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A self-heating battery pack, characterized by The self-heating battery pack comprises a shell, battery cells, heating sheets and a top cover assembly, the battery cells and the heating sheets are arranged in the shell, the top cover assembly covers the open end of the shell, wherein the battery cells are at least one, at least one side of each battery cell is correspondingly provided with a heating sheet, the top cover assembly comprises a top cover sheet, a positive electrode part, a negative electrode part, a first heating part and a second heating part arranged on the top cover sheet, the positive electrode part comprises a positive electrode column penetrating the top cover sheet, the negative electrode part comprises a negative electrode column penetrating the top cover sheet, the first heating part comprises a first heating electrode column penetrating the top cover sheet, the second heating part comprises a second heating electrode column penetrating the top cover sheet, one end of the positive electrode column and the negative electrode column extending into the shell are connected with each battery cell, one end of the first heating electrode column and the second heating electrode column extending into the shell are connected with each heating sheet.

2. The self-heating battery pack of claim 1, wherein, Corresponding heating sheets are arranged on opposite sides of each battery cell.

3. The self-heating battery pack of claim 2, wherein, The battery cells are provided in plurality, only one heating sheet is arranged between adjacent battery cells.

4. The self-heating battery pack of claim 1, wherein, First and second connecting sheets are arranged on each heating sheet, the first heating part further comprises a first heating adapter sheet, the second heating part further comprises a second heating adapter sheet, the first connecting sheet on each heating sheet is connected with the first heating electrode column through the first heating adapter sheet, and the second connecting sheet on each heating sheet is connected with the second heating electrode column through the second heating adapter sheet.

5. The self-heating battery pack of claim 4, wherein, The first connecting sheet on each heating sheet is welded with the first heating adapter sheet, and the second connecting sheet on each heating sheet is welded with the second heating adapter sheet.

6. The self-heating battery pack of claim 4, wherein, The first heating adapter sheet is welded with the end face of the first heating electrode column, and the second heating adapter sheet is welded with the end face of the second heating electrode column.

7. The self-heating battery pack of claim 1, wherein, The positive electrode part, the negative electrode part, the first heating part and the second heating part further comprise a lower plastic body, a sealing ring, an insulating ring, a stainless steel ring and an upper plastic body which are penetrated by corresponding electrode columns in sequence, the bottom of the electrode column is clamped and fixed on the lower plastic body, the top of the electrode column is clamped and fixed in the stainless steel ring, the sealing ring is arranged between the electrode column and the top cover sheet, the insulating ring is arranged between the stainless steel ring and the top cover sheet, the upper plastic body is wrapped outside the top of the electrode column, the insulating ring and the stainless steel ring, and one end of the electrode column clamped on the lower plastic body is connected with the connecting sheet on the heating sheet through the adapter sheet.

8. The self-heating battery pack of claim 7, wherein, The lower plastic bodies in the positive electrode part, the negative electrode part, the first heating part and the second heating part are integrally formed into a stop clamp, the stop clamp is pressed between the top cover sheet and the battery cell, and the stop clamp is used for preventing the battery cell from shaking in the shell.

9. The self-heating battery pack of claim 1, wherein, An insulating sheet is further arranged on the upper surface of the top cover sheet away from the shell, and the positive electrode column, the negative electrode column, the first heating electrode column and the second heating electrode column penetrate the insulating sheet respectively.

10. The self-heating battery pack of claim 1, wherein, The self-heating battery pack further comprises a power supply module, the first heating pole and the second heating pole extend out of one end of the shell and are connected with positive / negative poles of the power supply module respectively, and the power supply module is used for supplying power for the heating sheet.

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