CN217822998U - Electric equipment, power supply device and heating battery thereof - Google Patents

Abstract

The present application discloses an electric device, a power supply device and a heating battery. The heating battery includes a battery pack, a battery management system, and a heating element. The battery management system is installed on the battery pack, and the heating element is connected to the heating element. The battery management system is electrically connected, and the heating element is arranged on the surface of the battery pack. The above-mentioned heating battery uses additional heating means to meet the low-temperature charging requirements of the battery, and avoid cycle life attenuation and potential safety hazards caused by low-temperature charging.

Description

A kind of electrical equipment, power supply device and heating battery thereof

technical field

The present application relates to the technical field of lithium battery charging, in particular to a heating battery. It also relates to a power supply device. It also relates to an electrical device.

Background technique

In the outdoor environment in winter, charging lithium batteries in low temperature environment has certain risks.

As the temperature decreases, the kinetic characteristics of the graphite negative electrode become worse. During the charging process, the electrochemical polarization of the negative electrode is significantly intensified, and the precipitated metal lithium is easy to form lithium dendrites, which break through the separator and cause a short circuit between the positive and negative electrodes. Due to the low temperature, the lithium-ion battery nested on the negative electrode will produce ion crystallization and directly pierce the diaphragm. Generally, it will cause a micro-short circuit, which will affect the life and performance. In severe cases, it may explode. Therefore, the charging temperature of general lithium batteries is allowed to be above 0°C. . The existing two-wheeler battery design does not have a heating system, and the battery charging temperature is limited to 0-45°C. Even though some batteries allow charging below 0°C to cater to customers, the safety and cycle life of lithium batteries are sacrificed.

Therefore, how to provide a heating battery that solves the above technical problems is a technical problem urgently needed by those skilled in the art.

Utility model content

The purpose of this application is to provide a heating battery that uses additional heating means to meet the low-temperature charging requirements of the battery and avoid cycle life attenuation and potential safety hazards caused by low-temperature charging. Another object of the present application is to provide a power supply device. Another object of the present application is to provide an electric device.

To achieve the above purpose, the present application provides a heating battery, including a battery pack, a battery management system and a heating element, the battery management system is installed on the battery pack, and the heating element is electrically connected to the battery management system , the heating element is arranged on the surface of the battery pack.

Preferably, the battery management system includes a substrate and a first insert, the first insert is disposed on the substrate; the heating element includes a heating film and a second insert, and the second insert is electrically connected to the heating film , the second plug is electrically connected to the first plug in a plug-type manner.

Preferably, the heating film is attached to the surface of the cell pack.

Preferably, the number of the heating elements is two groups, and the two groups of the heating elements are respectively arranged on two opposite surfaces of the battery pack; the number of the first inserts is two, and the first inserts and the There is a one-to-one correspondence between the above-mentioned second plug-ins.

Preferably, a protective cover is further included, the protective cover wraps the battery pack, and the heating element is located between the protective cover and the battery pack.

Preferably, a heat insulation layer is also included, and the heat insulation layer is arranged between the protective cover and the heating element.

Preferably, the heat insulation layer is heat insulation foam, and the protective cover is heat shrinkable film.

Preferably, the battery pack has several battery cells, and the several battery cells are stacked along the thickness direction and pasted and fixed.

The present application also provides a power supply device, which includes a housing and the above-mentioned heating battery, and the heating battery is installed inside the housing.

The present application also provides an electric device using the above-mentioned power supply device.

With respect to the above-mentioned background technology, the heating battery provided in this application includes a battery pack, a battery management system and a heating element. The battery management system is installed on the battery pack, the heating element is electrically connected to the battery management system, and the heating element is arranged on the battery pack s surface.

During the working process of the heated battery, when the charging operation needs to be performed in a low-temperature environment, the heating element is used to heat up and keep the battery pack warm, which is equivalent to using additional heating means to meet the low-temperature charging requirements of the battery, thereby avoiding the Cycle life attenuation and potential safety hazards caused by low temperature charging.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Figure 1 is a schematic diagram of the explosion of the heating battery provided by the embodiment of the present application;

Figure 2 is a schematic diagram of the first assembly of the heating battery provided by the embodiment of the present application;

Fig. 3 is a second schematic diagram of the assembly of the heating battery provided in the embodiment of the present application;

FIG. 4 is a schematic structural diagram of a substrate provided in an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a heating element provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of the wiring of the heating element provided in the embodiment of the present application;

FIG. 7 is an electrical schematic diagram of the heating battery provided in the embodiment of the present application;

FIG. 8 is a schematic circuit diagram of a battery management system provided in an embodiment of the present application;

FIG. 9 is an exploded schematic diagram of a power supply device provided by an embodiment of the present application.

in:

1-heating battery, 2-shell, 10-cell pack, 20-battery management system, 30-heating element, 40-insulation layer, 50-protective cover, 21-substrate, 22-first plug-in, 23-output Wire harness, 31-heating film, 32-second insert, 201-first housing, 202-second housing.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

Please refer to Figures 1 to 9, wherein Figure 1 is a schematic diagram of the explosion of the heating battery provided by the embodiment of the present application, Figure 2 is a schematic diagram of the assembly of the heating battery provided by the embodiment of the present application, and Figure 3 is the schematic diagram of the heating battery provided by the embodiment of the present application Schematic diagram of the second assembly of the heating battery, Figure 4 is a schematic structural diagram of the substrate provided by the embodiment of the present application, Figure 5 is a schematic structural diagram of the heating element provided by the embodiment of the present application, and Figure 6 is the wiring principle of the heating element provided by the embodiment of the present application Fig. 7 is an electrical schematic diagram of the heating battery provided in the embodiment of the present application, Fig. 8 is a circuit schematic diagram of the battery management system provided in the embodiment of the present application, and Fig. 9 is an exploded schematic diagram of the power supply device provided in the embodiment of the present application.

In the first specific embodiment, the heating battery 1 provided by the present application includes a cell pack 10, a battery management system 20, and a heating element 30. The battery management system 20 is installed on the cell pack 10, and the heating element 30 and the battery management The system 20 is electrically connected, and the heating element 30 is disposed on the surface of the cell pack 10 .

In some embodiments, the above-mentioned heating battery 1 is an improvement based on the existing two-wheel lithium battery system, so as to realize battery heating in the two-wheel lithium battery system, so as to solve the low temperature of the two-wheel vehicle battery (such as below 0°C) The problem of not being able to charge; the battery management system 20 refers to a BMS battery system (BATTERY MANAGEMENT SYSTEM), referred to as BMS.

In the working principle of the heating battery 1, a heating element 30 is added on the surface of the cell pack 10; when charging, the battery management system 20 (BMS) controls the opening of the heating element 30, and the heating element 30 conducts heat into the cell. group 10, so as to ensure that the battery pack 10 is charged in a low temperature environment.

Specifically, during the working process of the heating battery 1, when the charging operation needs to be performed in a low-temperature environment, the heating element 30 is controlled by the battery management system 20, and the heating element 30 is used to heat up and keep the battery pack 10 warm. ; It is equivalent to using additional heating means to meet the low-temperature charging requirements of the battery, thereby avoiding the cycle life attenuation and potential safety hazards caused by low-temperature charging.

In some embodiments, the battery management system 20 includes a substrate 21 and a first insert 22, the first insert 22 is disposed on the substrate 21; the heating element 30 includes a heating film 31 and a second insert 32, the second insert 32 is electrically connected to the heating film 31 Connecting, the second plug-in 32 is electrically connected with the first plug-in 22; wherein, the first plug-in 22 is a female socket, and the second plug-in 32 is a male plug.

In some embodiments, the BMS adopts an integrated board structure as a whole, that is, the integrated design of the bus bar and the substrate 21; the BMS adds a connector, that is, the substrate 21 increases the first plug-in 22, thereby connecting with the heating element 30; The plug-in mode of a plug-in unit 22 solves the problem of difficult handling of the connecting wire harness of the heating element 30 .

In this embodiment, the heating element 30 is connected in series with the connector on the BMS, the wiring harness is regular, and the assembly process is simple; the BMS is designed wirelessly, and the structure is firm and stable; the overall scheme is integrated, and the structure is compact.

In addition, the base plate 21 is also provided with an output harness 23 .

In addition, the substrate 21 is also provided with two temperature probes for detecting the temperature of the cell pack 10 .

In some embodiments, referring to FIG. 7, the charger is connected to the battery pack to heat the battery 1; in the design of the BMS, the charging circuit is managed by the BMS, and the BMS design adds a switch ( Such as MOS tube) controls the heating circuit; when charging, the heating MOS is controlled to turn on and off to control the opening of the heating circuit, so as to ensure that the charging environment temperature is above 0°C.

In this embodiment, the heating control is implemented on the BMS with MOS tubes, which makes full use of the assembly space.

In some embodiments, the heating film 31 is pasted on the surface of the cell pack 10 .

Wherein, the fixing method of the heating film 31 may be pasting, or other methods such as clamping, which shall also belong to the description scope of this embodiment.

In some embodiments, the number of heating elements 30 is two groups, and the two groups of heating elements 30 are respectively arranged on two opposite surfaces of the battery pack 10; the number of first inserts 22 is two, and the first insert 22 and the second insert 32 one-to-one correspondence.

In this embodiment, two sets of heating elements 30 are divided into heating element A and heating element B, heating element A has a heating film A and a second insert A, and heating element B has a heating film B and a second insert B; correspondingly, The two first plug-ins 22 on the substrate 21 are divided into a first plug-in A and a first plug-in B; B is inserted into the first plug-in B.

In some embodiments, the heating battery 1 has two heating films 31 of the same specification (heating film A and heating film B), which are connected in series; the total voltage of the heating battery 1: 54.6V, the total power: 31.5W, satisfying The temperature rise is about 14.5°C/h; the single-piece heating film 31 rated voltage: 27.3V, rated power: 15.75W, rated resistance: 47.32±5%Ω, under the condition of rated power, the highest power density of the heating film 31: 0.1W/cm ^2. Rated voltage, normal temperature and no load dry burning, the maximum temperature on the surface of the heating film 31 is about 70°C.

In this embodiment, the heating film 31 is in close contact with both sides of the cell pack 10 to form symmetrical heating, each monomer is heated evenly, and the overall temperature rise is uniform.

In some embodiments, the heating film 31 is in the shape of a sheet, and its main cross-sectional structure is divided into: silicone leather (0.65mm), heating core (0.10mm), silicone leather (0.65mm) and double-sided adhesive (0.12mm) mm), total thickness: 1.5±0.2mm.

In some embodiments, the heating battery 1 further includes a protective sheath 50 , the protective sheath 50 encloses the battery pack 10 , and the heating element 30 is located between the protective sheath 50 and the battery pack 10 .

In this embodiment, the protective cover 50 wraps the battery pack 10 and the heating element 30 at the same time. On the one hand, it protects the internal components, and on the other hand, it wraps the battery pack 10 tightly, so that the The assembly is stable.

In some embodiments, the heating battery 1 further includes a heat insulating layer 40 disposed between the protective cover 50 and the heating element 30 .

Exemplarily, the heat insulation layer 40 is heat insulation foam; wherein, the heat insulation foam is EVA foam.

In this embodiment, the heat-insulating foam insulates heat from being conducted to the outside, increases the heating effect, and prevents the peripheral PVC heat-shrinkable film from being deformed by heat.

Exemplarily, the protective cover 50 is a heat-shrinkable film; wherein, the protective cover 50 is a PVC heat-shrinkable film.

In this embodiment, the PVC heat-shrinking process is simple and the cost is low. After heat-shrinking, the internal battery pack 10 is wrapped into a whole, which not only avoids the risk of long-term aging and failure of the foam double-sided adhesive between the batteries, but also facilitates subsequent processing. and into the housing.

In addition, the cell pack 10 has several cells, which are stacked along the thickness direction and pasted and fixed.

In a specific assembly instruction of the heating cell 1:

Foam is arranged between each cell and double-sided adhesive foam is used to stack and bond the cells together; after each cell forms a cell group 10, a substrate 21 is installed on the top to form a cell module;

Paste heating film A and heating film B with glue on the left and right sides of the battery module, the heating film 31 is close to the side of the battery cell, and the plug and socket are plugged together to complete the connection between the heating film 31 and the BMS;

Paste heat-insulating foam on the outside of the heating film A and heating film B, wrap the PVC heat-shrinkable film around the entire module and fix it by heat shrinkage, and complete the assembly of the heating battery 1.

The present application also provides a power supply device, which includes a casing 2 and the above-mentioned heating battery 1 should have all the beneficial effects of the above-mentioned heating battery 1, which will not be repeated here; wherein, the heating battery 1 is installed inside the casing 2; for example, The power supply unit is a lithium battery for a two-wheeled vehicle.

In this embodiment, after completing the assembly of the heating battery 1 above, the power supply unit is assembled:

Put the heating battery 1 into the casing and fix it, glue the casing, make the first casing 201 and the second casing 202 fasten and fix, and complete the assembly of the power supply device.

The present application also provides an electric device using the above-mentioned power supply device; for example, the electric device is a two-wheeled vehicle.

It should be noted that many of the components mentioned in this application are general standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods; The problem to be solved in this application is low-temperature charging, and this application can realize low-temperature charging through the combination of the above-mentioned components.

It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such relationship between these entities. Actual relationship or sequence.

The electric equipment, the power supply device and the heating battery thereof provided by the present application have been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims (8)

1. The utility model provides a heating battery, its characterized in that, includes electric core group (10), battery management system (20), heating member (30), insulating layer (40) and protective sheath (50), battery management system (20) install in electric core group (10), heating member (30) with battery management system (20) electric connection, heating member (30) set up in the surface of electric core group (10), protective sheath (50) parcel electric core group (10), heating member (30) are located protective sheath (50) with between electric core group (10), insulating layer (40) set up in protective sheath (50) with between heating member (30).

2. The heating battery according to claim 1, characterized in that the battery management system (20) comprises a base plate (21) and a first insert (22), the first insert (22) being provided to the base plate (21); the heating element (30) comprises a heating film (31) and a second plug-in unit (32), the second plug-in unit (32) is electrically connected with the heating film (31), and the second plug-in unit (32) is electrically connected with the first plug-in unit (22) in a plug-in mode.

3. The heating battery according to claim 2, wherein the heating film (31) is attached to the surface of the electric core pack (10).

4. The heating battery according to claim 2, wherein the number of the heating members (30) is two, and the two groups of the heating members (30) are respectively arranged on two opposite surfaces of the electric core group (10); the number of the first plug-in units (22) is two, and the first plug-in units (22) correspond to the second plug-in units (32) in a one-to-one mode.

5. The heating cell according to claim 1, wherein the thermal insulation layer (40) is thermal insulation foam and the protective sheath (50) is a heat shrink.

6. The heating battery according to any one of claims 1 to 4, wherein the electric core group (10) has a plurality of electric cores, and the electric cores are stacked and fixed by adhesion along the thickness direction of the electric cores.

7. A power supply device, characterized by comprising a housing (2) and a heating battery (1) according to any one of claims 1 to 6, said heating battery (1) being mounted inside said housing (2).

8. An electric device characterized by using the power supply device according to claim 7.

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