CN214153013U

CN214153013U - Ultra-low temperature lithium ion battery organizes heating device

Info

Publication number: CN214153013U
Application number: CN202023074293.8U
Authority: CN
Inventors: 孙俊成; 朱德金; 李兆龙; 庞鹏; 刘子敬; 张学花; 韩勇
Original assignee: Shandong Tongda New Energy Co ltd
Current assignee: Shandong Tongda New Energy Co ltd
Priority date: 2020-12-19
Filing date: 2020-12-19
Publication date: 2021-09-07
Anticipated expiration: 2030-12-19

Abstract

The utility model provides an ultra-low temperature lithium ion battery organizes heating device, relates to battery heating apparatus technical field, including setting up the heating plate between the battery and on the battery outer wall, still is equipped with heat conduction silica gel layer between heating plate and the battery lateral wall, and the last electricity of heating plate is connected with BMS battery system, and BMS battery system still electricity is connected with and detects battery surface temperature's temperature probe. The utility model solves the problems that the battery pack is directly heated by the heating device in the traditional technology, the surface of the battery is easily heated unevenly, and the service life of the battery is influenced in the long term; and after the battery pack is heated, the constant temperature state of the battery pack cannot be guaranteed, the temperature fluctuation is large, and the charging stability of the battery is influenced.

Description

Ultra-low temperature lithium ion battery organizes heating device

Technical Field

The utility model relates to a battery heating apparatus technical field, concretely relates to ultra-low temperature lithium ion battery organizes heating device.

Background

The lithium ion battery is widely applied to the fields of communication, illumination, energy storage, electric vehicles, electric bicycles, electric tools and the like. The lithium ion battery is mainly divided into a cylindrical battery, a square aluminum shell battery, a soft package battery and the like according to the shell structure, the low-temperature performance of the lithium ion battery is poor, the service life of the battery is halved when the temperature reaches below 0 ℃, and the battery is difficult to normally charge and discharge when the temperature reaches below-20 ℃. Therefore, in cold weather environments, the application of lithium ion batteries is limited. It is necessary to develop a battery module that can be normally used at a low temperature to be adapted to cold northern regions such as northern europe, russia, northeast china, inner mongolia, and the like.

A lithium ion battery is a type of secondary battery that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + (lithium ions) are intercalated and deintercalated back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

The ultra-low temperature lithium ion battery is a battery which can be used in an ultra-low temperature environment, and generally requires normal discharge at-40 ℃, but due to the characteristics of the lithium ion battery, the charging operation cannot be performed at the temperature, and if forced charging is performed, the internal structure of the lithium ion battery is damaged, so that the electrolyte is decomposed, the battery bulges, the safety performance of the battery is affected, and the problems of irreversible capacity loss and the like are caused.

The patent of a CN206180057U is disclosed in the prior art, which comprises a housing, a heating device and a battery pack, wherein the battery pack and the heating device are both located inside the housing, the battery pack comprises a plurality of sub battery packs, the heating device comprises a heating sheet and a heating circuit, the heating sheet is connected with the heating circuit, the heating sheet is arranged in the middle of two adjacent sub battery packs, and the scheme is suitable for being used in cold regions.

However, the device gradually exposes the defects of the technology in production and use, and mainly shows the following aspects:

first, because under the low temperature condition, the surface temperature of the battery is too low, and the battery pack is directly heated by the heating device, the surface of the battery is easily heated unevenly, and the service life of the battery is affected in a long time.

Secondly, the device is heating the back to the group battery, can't guarantee the constant temperature state of group battery, and temperature fluctuation is big, influences the charge stability of battery.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides an ultra-low temperature lithium ion battery pack heating device, which is used for solving the problem that the battery pack is directly heated by the heating device in the traditional technology, so that the surface of the battery is easily heated unevenly, and the service life of the battery is influenced after long time; and after the battery pack is heated, the constant temperature state of the battery pack cannot be guaranteed, the temperature fluctuation is large, and the charging stability of the battery is influenced.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an ultra-low temperature lithium ion battery group heating device, is including setting up the heating plate between the battery and on the battery outer wall, still be equipped with heat conduction silica gel layer between heating plate and the battery lateral wall, the last electricity of heating plate is connected with BMS battery system, BMS battery system still electricity be connected with detect battery surface temperature's temperature probe.

As an optimized scheme, the periphery of a battery pack consisting of a plurality of batteries is further coated with a battery pack heat-insulating layer.

As an optimized scheme, the heating plate is a silica gel heating plate or a carbon fiber heating plate.

As an optimized solution, the heating tabs are connected to the BMS battery system through heating leads.

As an optimized scheme, the heat-conducting silica gel layer is an organic heat-conducting silica gel layer.

As an optimized scheme, the battery pack heat insulation layer comprises EVA flame-retardant sponge, and the thickness of the EVA flame-retardant sponge is 10-20 mm.

As an optimized scheme, a charger insertion detection module is arranged on the BMS battery system.

Compared with the prior art, the beneficial effects of the utility model are that:

the heat emitted by the heating sheet can be uniformly conducted to the battery by the heat conducting silica gel layer, so that the stability of heating the battery pack is realized, the battery is protected, and the service life of the battery is prolonged;

the BMS battery system is arranged to control the charging of the heating sheet and the battery, so that the heat preservation state is maintained when the temperature is heated, the battery is charged, and the charging stability of the battery is ensured;

this ultra-low temperature lithium ion battery group, when ambient temperature was crossed lowly, especially when the group battery need carry out the charging operation, heat lithium ion battery group earlier to guarantee that lithium ion battery's operational environment is in stable state, can normally carry out the charging operation, increase substantially the work efficiency and the application scope of battery, prolong the life of battery, guarantee the security performance of battery, operation control is simple and convenient, easily large-scale manufacturing and installation, and the range of application is wide.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1-a battery; 2-heating plate; 3-heat conducting silica gel layer; 4-temperature probe; 5-heating the lead; 6-battery pack insulating layer; 7-BMS battery system.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, the ultra-low temperature lithium ion battery pack heating device comprises heating sheets 2 arranged between batteries 1 and on the outer wall of the batteries 1, a heat conducting silica gel layer 3 is further arranged between the heating sheets 2 and the side wall of the batteries 1, a BMS battery system 7 is electrically connected to the heating sheets 2, and the BMS battery system 7 is further electrically connected to a temperature probe 4 for detecting the surface temperature of the batteries 1.

The structure of the BMS battery system 7 is common in the daily life, and detailed description thereof is omitted herein because the specific structure does not belong to the innovation of the present solution.

The periphery of a battery 1 group formed by a plurality of batteries 1 is also coated with a battery group heat-insulating layer 6.

The heating plate 2 is a silica gel heating plate or a carbon fiber heating plate.

The heating chip 2 is connected to the BMS battery system 7 through the heating lead 5.

The driving current of the heating driving circuit of the BMS battery system 7 is 5-15A.

The BMS battery system 7 adopts a PWM (pulse width modulation) technology to adjust the current duty ratio so as to ensure that the battery 1 set continues to maintain a constant temperature state after being heated to a set temperature.

The heat-conducting silica gel layer 3 is an organic heat-conducting silica gel layer 3.

The battery pack heat insulation layer 6 comprises EVA flame-retardant sponge, and the thickness of the EVA flame-retardant sponge is 10-20 mm.

Be equipped with the charger on BMS battery system 7 and insert detection module, BMS battery system 7 opens the heating operation when needing to discern the charger and insert, avoids opening the heating when not inserting the charger under the low temperature state, and BMS battery system 7 need distinguish and inserts two kinds of states of charger and not inserting the charger.

Under the low temperature environment, the BMS detects the temperature of the battery 1 through the temperature probe 4, if the temperature is lower than 0 ℃, and under the condition of connecting the charger, the heating sheet 2 is supplied with power through the heating lead 5 of the heating driving circuit of the BMS, and when the temperature reaches the set heating temperature, the heat preservation state is maintained, and the battery 1 is charged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides an ultra-low temperature lithium ion battery organizes heating device which characterized in that: including setting up heating plate (2) between battery (1) and on battery (1) outer wall, still be equipped with heat conduction silica gel layer (3) between heating plate (2) and battery (1) lateral wall, electricity is connected with BMS battery system (7) on heating plate (2), BMS battery system (7) still electricity be connected with detect battery (1) surface temperature's temperature probe (4).

2. The ultra-low temperature lithium ion battery pack heating apparatus of claim 1, wherein: the periphery of a battery pack consisting of a plurality of batteries (1) is also coated with a battery pack heat-insulating layer (6).

3. The ultra-low temperature lithium ion battery pack heating apparatus of claim 1, wherein: the heating plate (2) is a silica gel heating plate or a carbon fiber heating plate.

4. The ultra-low temperature lithium ion battery pack heating apparatus of claim 1, wherein: the heating tab (2) is connected to the BMS battery system (7) through a heating lead (5).

5. The ultra-low temperature lithium ion battery pack heating apparatus of claim 1, wherein: the heat-conducting silica gel layer (3) is an organic heat-conducting silica gel layer.

6. The ultra-low temperature lithium ion battery pack heating apparatus of claim 2, wherein: the battery pack heat-insulating layer (6) comprises EVA flame-retardant sponge.

7. The ultra-low temperature lithium ion battery pack heating apparatus of claim 6, wherein: the thickness of the EVA flame-retardant sponge is 10-20 mm.

8. The ultra-low temperature lithium ion battery pack heating apparatus of claim 1, wherein: and the BMS battery system (7) is provided with a charger insertion detection module.