Battery module and lithium ion battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and a lithium ion battery, the battery module comprises a first battery cell, a second battery cell, an insulation radiating fin and a PCBA (Printed Circuit Board Assembly), the second battery cell is arranged on the first battery cell, a first tab group is arranged on the first battery cell, a second tab group is arranged on the second battery cell, and the insulation radiating fin is arranged on the PCBA. A mounting space is formed between the first tab group and the second tab group; the insulation cooling fin is arranged in the mounting space, and the insulation cooling fin is attached to the first battery cell and the second battery cell; the PCBA board is located in the installation space and arranged on the side, away from the first battery cell and the second battery cell, of the insulation cooling fin, and the PCBA board is electrically connected with the first tab set and the second tab set. The cruising ability, the service life and the safety performance of the battery module and the lithium ion battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module and a lithium ion battery. Background Art

[0002] With the rapid development of new energy batteries and consumer electronic products, lithium-ion batteries are widely used in consumer electronic products. At the same time, the technology of lithium-ion batteries is also rapidly improved to meet people's demand for the use of electronic products.

[0003] At present, lithium-ion batteries used in consumer electronic products experience high temperature rise during high-rate (fast charge and fast discharge) charging and discharging, which reduces the battery's endurance and service life and poses certain safety hazards. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a battery module and a lithium-ion battery to solve the problem in the prior art that the lithium-ion battery will generate high temperature rise during the high-rate (fast charge and fast discharge) charging and discharging process, which reduces the battery's endurance and service life and poses certain safety hazards.

[0005] The utility model discloses a battery module, comprising: a first battery cell, a second battery cell, an insulating heat sink and a PCBA board, wherein the second battery cell is arranged on the first battery cell, a first pole lug group is arranged on the first battery cell, a second pole lug group is arranged on the second battery cell, and an installation space is formed between the first pole lug group and the second pole lug group; an insulating heat sink is arranged in the installation space, and the insulating heat sink is attached to the first battery cell and the second battery cell; a PCBA board is located in the installation space and is arranged on a side of the insulating heat sink away from the first battery cell and the second battery cell, and the PCBA board is electrically connected to the first pole lug group and the second pole lug group respectively.

[0006] Optionally, the insulating heat sink is rectangular, and two opposite sides of the insulating heat sink are respectively abutted against the corresponding first pole lug group and the second pole lug group; the other two opposite sides of the insulating heat sink are respectively flush with the corresponding edges of the first battery cell and the second battery cell.

[0007] Optionally, an insulating member is provided on a side of the PCBA board facing away from the insulating heat sink, and the insulating member covers the PCBA board.

[0008] Optionally, the battery module further includes a shell, the first battery cell, the second battery cell and the insulating member are all arranged in the shell, and a plug wire is also arranged on the PCBA board, and the plug wire extends out of the shell.

[0009] Optionally, the shell is made of polyvinyl chloride material.

[0010] Optionally, a first opening and a second opening are formed at opposite ends of the shell, part of the insulating member is exposed through the first opening, and the plug wire extends from the shell along the first opening; part of the first battery cell and part of the second battery cell are exposed through the second opening.

[0011] Optionally, the first opening and the second opening are elliptical.

[0012] Optionally, the insulating member abuts against one end of the shell forming a first opening, and the first battery cell and the second battery cell both abut against one end of the shell forming a second opening.

[0013] Optionally, the insulating heat sink is a paraffin heat sink.

[0014] The utility model also discloses a lithium ion battery, comprising the battery module described above.

[0015] Compared with the prior art, the battery module and lithium-ion battery provided by the embodiments of the utility model have the following beneficial effects: by arranging an insulating heat sink in the installation space formed between the first pole tab group and the second pole tab group, and the insulating heat sink is attached to the first battery cell and the second battery cell, the heat generated by the battery module during high-rate charging and discharging through the PCBA board is absorbed and dissipated by the insulating heat sink, thereby preventing the occurrence of high temperature rise phenomenon during high-rate charging and discharging of the battery module, thereby improving the endurance, service life and safety performance of the battery module and the lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of the exploded structure of a battery module provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the battery module provided by the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of a first battery cell, a second battery cell and an insulating member provided in an embodiment of the utility model, which are arranged in a housing;

[0020] Figure 4 yes Figure 3 Bottom view of

[0021] Figure 5 yes Figure 3 A top view of

[0022] The reference numerals in the figures are:

[0023] 10. First battery cell; 101. Installation space; 110. First tab group; 20. Second battery cell; 210. Second tab group; 30. Insulating heat sink; 40. PCBA board; 50. Plug wire; 60. Insulating member; 70. Shell; 701. First opening; 702. Second opening. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0025] The utility model embodiment provides a battery module, such as Figure 1 and Figure 2 As shown, it includes: a first battery cell 10, a second battery cell 20, an insulating heat sink 30 and a PCBA board 40, the second battery cell 20 is arranged on the first battery cell 10, a first pole lug group 110 is arranged on the first battery cell 10, and a second pole lug group 210 is arranged on the second battery cell 20, and an installation space 101 is formed between the first pole lug group 110 and the second pole lug group 210; the insulating heat sink 30 is arranged in the installation space 101, and the insulating heat sink 30 is attached to the first battery cell 10 and the second battery cell 20; the PCBA board 40 is located in the installation space 101, and is arranged on the side of the insulating heat sink 30 away from the first battery cell 10 and the second battery cell 20, and the PCBA board 40 is electrically connected to the first pole lug group 110 and the second pole lug group 210 respectively.

[0026] The battery module of this embodiment is provided with an insulating heat sink 30 in the installation space 101 formed between the first pole tab group 110 and the second pole tab group 210, and the insulating heat sink 30 is attached to the first battery cell 10 and the second battery cell 20. The heat generated by the battery module during high-rate charging and discharging through the PCBA board 40 is absorbed and dissipated by the heat sink, thereby preventing the occurrence of high temperature rise phenomenon during high-rate charging and discharging of the battery module, thereby improving the battery life and service life of the battery module and reducing the safety hazards of the battery module.

[0027] The first electrode tab group 110 and the second electrode tab group 210 both include a positive electrode tab and a negative electrode tab.

[0028] As a preferred solution of this embodiment, the insulating heat sink 30 adopts a paraffin heat sink. The paraffin heat sink is a heat sink that uses paraffin as a phase change material. The paraffin heat sink has a high heat storage capacity, absorbs and releases latent heat during the phase change process, and effectively stores thermal energy; the paraffin heat sink also has the advantage of temperature buffering, and the phase change process of paraffin helps to stabilize the operating temperature of the battery module; in addition, the paraffin heat sink can still maintain good performance after multiple thermal cycles, and is suitable for the cyclic charge and discharge process of the battery module.

[0029] The above-mentioned paraffin heat sink is an existing heat sink, and the phase change temperature of the corresponding paraffin heat sink can be matched according to the maximum temperature of the battery module during actual use. For example, if the maximum temperature of the battery module does not exceed 55°C during actual use, a paraffin heat sink with a phase change temperature of 30°C can be selected. The paraffin heat sink can absorb heat by phase change when the temperature reaches 30°C, so that the temperature of the battery module is maintained at 30°C to 40°C, thereby reducing the overall surface temperature of the battery and improving the battery service life, battery endurance and safety performance.

[0030] As a preferred solution of this embodiment, the insulating heat sink 30 is rectangular, and two opposite side edges of the insulating heat sink 30 are respectively abutted against the corresponding first pole lug group 110 and the second pole lug group 210; the other two opposite side edges of the insulating heat sink 30 are respectively flush with the corresponding edges of the first battery cell 10 and the second battery cell 20.

[0031] Among them, the above-mentioned limitation of the insulating heat sink 30 in this embodiment can increase the contact area between the insulating heat sink 30 and the first battery cell 10 and the second battery cell 20, increase the rate at which the insulating heat sink 30 absorbs heat, and prevent the occurrence of high temperature rise during high-rate charging and discharging of the battery module.

[0032] As a preferred solution of this embodiment, refer to Figure 1 An insulating member 60 is disposed on a side of the PCBA board 40 facing away from the insulating heat sink 30 , and the insulating member 60 covers the PCBA board 40 .

[0033] Among them, the setting of the insulating member 60 can provide electrical insulation protection, prevent the PCBA board 40 from direct contact with external metal or conductive materials, avoid short circuit and other safety risks, and improve the safety performance of the battery module of this embodiment; in addition, the insulating member 60 can also provide mechanical support and protection, enhance the structural strength of the PCBA board 40, and prevent the PCBA board 40 from bending or extrusion deformation during use; finally, the insulating member 60 can play a certain degree of dust and moisture-proof role, protecting the circuit components on the PCBA board 40 from dust, water vapor and other external environment damage, so that the battery module maintains good electrical performance.

[0034] As a preferred solution of this embodiment, refer to Figure 1 and Figure 3 The battery module also includes a shell 70 , and the first battery cell 10 , the second battery cell 20 and the insulating member 60 are all arranged in the shell 70 . The PCBA board 40 is also provided with a plug wire 50 , and the plug wire 50 extends out from the shell 70 .

[0035] The housing 70 provides a stable installation environment for the first battery cell 10, the second battery cell 20, the insulating heat sink 30, the PCBA board 40 and the insulating member 60, which improves the integration of the battery module and facilitates storage and use. On the other hand, it can improve the safety performance and service life of the battery module in unexpected situations such as external impact. The plug line 50 is used to realize the electrical connection between the battery module and the external device.

[0036] As a preferred solution of this embodiment, the shell 70 is made of polyvinyl chloride material.

[0037] Among them, polyvinyl chloride (PVC) material is a good insulating material, which can effectively isolate the first battery cell 10 and the second battery cell 20, and improve the safety and stability of the battery module; polyvinyl chloride (PVC) material has good corrosion resistance and can extend the service life of the battery module; polyvinyl chloride (PVC) material is easy to process and form, and can be manufactured according to design requirements to adapt to the first battery cell 10 and the second battery cell 20 The shell 70 improves production efficiency; polyvinyl chloride (PVC) material is a lightweight material that can reduce the overall weight of the battery module, which is conducive to its application in lightweight electronic products.

[0038] As a preferred solution of this embodiment, a first opening 701 and a second opening 702 are formed at opposite ends of the shell 70, a portion of the insulating member 60 is exposed through the first opening 701, and the plug wire 50 extends from the shell 70 along the first opening 701; a portion of the first battery cell 10 and a portion of the second battery cell 20 are exposed through the second opening 702.

[0039] The first opening 701 and the second opening 702 can also dissipate heat to prevent high temperature rise in the shell 70, thereby improving the battery life and life of the battery module of this embodiment and reducing safety hazards.

[0040] As a preferred solution of this embodiment, the insulating member 60 abuts against one end of the shell 70 forming the first opening 701 , and the first battery cell 10 and the second battery cell 20 abut against one end of the shell 70 forming the second opening 702 .

[0041] The above-mentioned setting relationship enables the two ends of the shell 70 to limit the first battery cell 10, the second battery cell 20 and the insulating member 60, thereby enhancing the overall integration and connection stability of the battery module and improving the performance and installability of the battery module.

[0042] The present application also discloses a lithium-ion battery, the battery module in the above embodiment. The lithium-ion battery includes the same structure and beneficial effects as the battery module in the above embodiment. The structure and beneficial effects of the battery module have been described in detail in the above embodiment and will not be repeated here.

[0043] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A battery module, characterized in that: include: A first battery cell and a second battery cell, wherein the second battery cell is disposed on the first battery cell, a first electrode tab group is disposed on the first battery cell, and a second electrode tab group is disposed on the second battery cell, and an installation space is formed between the first electrode tab group and the second electrode tab group; An insulating heat sink is disposed in the installation space, and the insulating heat sink is attached to the first battery core and the second battery core; A PCBA board is located in the installation space and is arranged on a side of the insulating heat sink away from the first battery cell and the second battery cell. The PCBA board is electrically connected to the first tab group and the second tab group respectively.

2. The battery module according to claim 1, characterized in that: The insulating heat sink is rectangular, and two opposite edges of the insulating heat sink are respectively in contact with the corresponding first tab group and the second tab group; the other two opposite edges of the insulating heat sink are respectively flush with the corresponding edges of the first battery cell and the second battery cell.

3. The battery module according to claim 2, characterized in that: An insulating member is provided on a side of the PCBA board facing away from the insulating heat sink, and the insulating member covers the PCBA board.

4. The battery module according to claim 3, characterized in that: The battery module also includes a shell, and the first battery cell, the second battery cell and the insulating member are all arranged in the shell; the PCBA board is also provided with a plug wire, and the plug wire extends out of the shell.

5. The battery module according to claim 4, characterized in that: The shell is made of polyvinyl chloride material.

6. The battery module according to claim 4, characterized in that: The shell is formed with a first opening and a second opening at opposite ends, a portion of the insulating member is exposed through the first opening, and the plug wire extends out of the shell along the first opening; A portion of the first battery cell and a portion of the second battery cell are exposed through the second opening.

7. The battery module according to claim 6, characterized in that: The first opening and the second opening are elliptical in shape.

8. The battery module according to claim 6, characterized in that: The insulating member is in contact with one end of the shell forming a first opening, and the first battery core and the second battery core are both in contact with one end of the shell forming a second opening.

9. The battery module according to claim 1, characterized in that: The insulating heat sink is a paraffin heat sink.

10. A lithium ion battery, characterized in that: A battery module comprising any one of claims 1 to 9.

Images