Lithium battery module integrated with heating control system

Abstract

The invention discloses a lithium battery module integrated with a heating control system in the technical field of lithium batteries, and the lithium battery module comprises a temperature control assembly, a plurality of pressing plates, side plates, partition plates and connecting rods, the plurality of pressing plates are symmetrically arranged up and down, the bottom end of the top pressing plate is connected with a battery bracket, holes are formed in the battery bracket in an array mode, and single batteries are connected in the holes; the single batteries and the connecting rods are connected among the pressing plates, the temperature control assembly comprises a temperature relay, a plurality of side plates, partition plates and heating films, the horizontal single batteries form a group, the heating films are connected with the side walls of the same sides of the single batteries respectively, and the distance between holes of the battery support is larger than the sum of the diameter of the single batteries and the thickness of the heating films. The multiple partition plates are symmetrically connected to the two sides of the battery support and are perpendicular to the heating film, the temperature relay is connected with one partition plate, the temperature relay is embedded in the side plates, the multiple side plates are symmetrically connected between the multiple pressing plates, the two ends of the multiple side plates are perpendicularly connected with the multiple check blocks, and the check blocks are connected between the multiple pressing plates.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a lithium battery module with an integrated heating control system. Background Art

[0002] Lithium-ion batteries have gradually replaced nickel-metal hydride batteries, zinc-silver batteries and other batteries due to their high capacity, high energy density, good cycle stability, and portability, and are widely used in electronic products (such as mobile phones, PDAs, digital cameras, etc.). In addition, lithium-ion batteries have also become energy storage devices for other unstable clean energy sources (such as solar energy, wind energy, and tidal energy). In recent years, lithium-ion batteries have gradually been used in hybrid vehicles and electric vehicles.

[0003] At present, there are many studies on lithium battery modules. Lithium battery modules have many advantages, such as easy series and parallel design and grouping, simple assembly, improved design efficiency, and reduced assembly errors. The common lithium battery module currently combines many 18650 monomers through a bracket, and uses different series and parallel designs to lead out the current line and the voltage line to form a single module or multiple modules. Due to its own characteristics, the discharge performance of lithium batteries drops sharply at low temperatures, the battery cell capacity is reduced, and charging lithium batteries at low temperatures will greatly shorten the battery life. Therefore, a heating system is required in the above application scenarios to heat the lithium battery to room temperature for charging and discharging.

[0004] The prior art adopts the method of using heating wire to wrap around the lithium battery pack and using heating film. However, during the use of the above two heating methods, the heating wire and the heating film are connected in different ways, and it is impossible to achieve fixed-point connection between the single cells, so that the heating consistency of multiple single cells cannot be guaranteed. Under long-term working conditions, the battery voltage is prone to inconsistency between the single cells, thereby causing the lithium battery to overcharge and affect the safety of the lithium battery. Summary of the invention

[0005] The present invention aims to provide a lithium battery module with an integrated heating control system to solve the problem that the heating system adopted by the existing lithium battery module cannot ensure the heating consistency of the single battery.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a lithium battery module with an integrated heating control system, comprising a temperature control component, a plurality of pressure plates, a side plate, a partition and a connecting rod, wherein the plurality of pressure plates are symmetrically arranged up and down, the bottom end of the top pressure plate is connected to a battery holder, the battery holder is arrayed with holes, single cells are connected in the holes, the single cells and a plurality of connecting rods are connected between the plurality of pressure plates, the connecting rods penetrate the battery holder, the temperature control component comprises a temperature relay, a plurality of side plates, a partition and a heating film, a plurality of the single cells are horizontally grouped as a group, a plurality of heating films are respectively connected to the same side walls of the plurality of groups of single cells, the hole spacing of the battery holder is greater than the sum of the diameter of the single cell and the thickness of the heating film, the plurality of partitions are symmetrically connected to both sides of the battery holder and are arranged perpendicularly to the heating film, the temperature sensing surface of the temperature relay is connected to one of the partitions, the temperature relay is embedded in one of the side plates, the plurality of side plates are symmetrically connected between the plurality of pressure plates, the two ends of the plurality of side plates are vertically connected to a plurality of blocks, and the blocks are connected between the plurality of pressure plates.

[0007] Furthermore, the heating film is closely attached to the outer cylindrical surface of the single battery, and there is a gap between the heating film and the connecting rod. By setting the position of the heating film, the heating effect of the single battery is better.

[0008] Furthermore, a gap is left between the pressing plate and the battery support, so as to facilitate the series and parallel connection between the single batteries and the extraction of the pressed nickel strip.

[0009] Furthermore, the lead-out nickel strip of the single cell passes through the gap between the pressing plate and the battery holder, is located between the battery holder and the block, and is connected to the side wall of the battery holder by means of adhesive tape. The use of the adhesive tape prevents the lead-out nickel strip from shaking.

[0010] Furthermore, there are multiple battery brackets, which are symmetrically arranged up and down. The stability of the lithium battery module is improved by arranging multiple battery brackets.

[0011] Furthermore, the length of the stopper is greater than the length of the pressing plate. The length setting of the stopper facilitates the connection between multiple lithium battery modules and the fixing of the lithium battery modules on the housing.

[0012] Furthermore, there is no gap between the temperature relay, the partition and the plurality of heating films. Through the setting of the connection between the temperature relay, the partition and the heating film, the heating out of control and the thermal management out of control of the single battery are avoided.

[0013] Furthermore, the stopper is provided with a plurality of threaded holes, which facilitate subsequent connection.

[0014] Furthermore, according to any one of the above-mentioned lithium battery modules with integrated heating control system, the lithium battery module can be used alone or in combination.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention can effectively solve the difficulties of integrating the heating control system of the lithium battery module, broaden the application scope of the lithium battery module, improve the charging and discharging performance of the lithium battery at low temperature, help the lithium battery to fully release the battery cell capacity, and extend the cycle life of the lithium battery at low temperature.

[0016] 2. The present invention has great advantages for the final grouping of lithium batteries, and is easy to design in series and parallel, thereby improving assembly efficiency.

[0017] 3. The present invention can be connected in series to form a group, or installed individually on the housing, and has the characteristics of convenient installation and rapid assembly.

[0018] 4. The present invention has a simple and compact structure, is easy to manufacture, has high reliability, is low in cost, and has very strong anti-vibration and buffering functions, so it has great promotion prospects and social needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a lithium battery module with an integrated heating control system according to the present invention;

[0020] Figure 2 for Figure 1 Left side sectional view of

[0021] Figure 3 for Figure 1 A top view of

[0022] Figure 4 for Figure 2 A partial enlarged view of middle I;

[0023] Figure 5 for Figure 1 Schematic diagram of top view of the connection between the central heating film and the single battery. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The figure marks in the drawings of the specification include: a pressure plate 1, a first screw 2, a battery bracket 3, a connecting rod 4, a block 5, a side plate 6, a temperature relay 7, a partition 8, a second screw 9, an adhesive tape 10, a heating film 11, a single battery 12, and a lead-out nickel strip 13.

[0026] The embodiment is basically as shown in the attached Figure 1 -Attached Figure 5As shown: a lithium battery module with an integrated heating control system, including a temperature control component, two pressing plates 1, a side plate 6, a partition 8, a block 5 and twelve connecting rods 4, the two pressing plates 1 are symmetrically arranged up and down, the twelve connecting rods 4 are evenly fixedly connected between the two pressing plates 1 by a first screw 2, the two ends of the connecting rod 4 are respectively fixedly connected with a battery holder 3, the connecting rod 4 passes through the battery holder 3, the two battery holders 3 are located between the two pressing plates 1, a gap is left between the pressing plate 1 and the battery holder 3, forty-eight holes are arrayed on the battery holder 3, a single battery 12 is slidably connected in the hole, the single battery 12 is located between the two pressing plates 1, the lead-out nickel strip 13 of the single battery 12 passes through the gap between the pressing plate 1 and the battery holder 3, the lead-out nickel strip 13 is connected to the side wall of the battery holder 3 by a tape 10, the temperature control component includes a temperature relay 7, two side plates 6, a partition 8 and six heating films 11, Eight horizontal single cells 12 form a group, six heating films 11 are tightly connected to the same side walls of the six groups of single cells 12, there is a gap between the heating film 11 and the connecting rod 4, the hole spacing of the battery holder 3 is larger than the sum of the diameter of the single cell 12 and the thickness of the heating film 11, two partitions 8 are symmetrically fixedly connected to the two sides of the battery holder 3 and are vertically arranged with the heating film 11, the temperature sensing surface of the temperature relay 7 is fixedly connected to the left partition 8, there is no gap between the temperature relay 7, the partition 8 and the six heating films 11, the temperature relay 7 is embedded in one of the side plates 6, the two side plates 6 are symmetrically fixedly connected between the two pressure plates 1, the two blocks 5 are fixedly connected between the two pressure plates 1 and are vertically fixedly connected to the two side plates 6 using the second screws 9, the length of the block 5 is larger than the length of the pressure plate 1, the block 5 is provided with a threaded hole, the nickel strip 13 is led out between the battery holder 3 and the block 5.

[0027] Taking 6 in parallel and 8 in series as an example, 48 single cells 12, 2 battery holders 3 with 6 rows and 8 columns, 12 connecting rods 4, 6 heating films 11, 2 pressure plates 1, 24 first screws 2, 2 blocks 5, 1 side plate 6, 1 temperature relay 7, 1 partition 8, 32 second screws 9 and several tapes 10 are prepared. According to the series-parallel relationship, 48 single cells 12 are placed in the battery holder 3, the connecting rods 4 and the heating film 11 are assembled, the single cells 12 are connected in series and parallel through nickel strips, the pressure plate 1 is installed through the first screw 2, the temperature relay 7 is placed in the groove of the side plate 6, the side plate 6 is embedded in the block 5, the block 5 is installed through the second screw 9, and a partition 8 of suitable specifications is inserted between the heating film 11 and the temperature sensing surface of the temperature relay 7, finally forming a lithium battery module with an integrated heating control system.

[0028] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A lithium battery module with an integrated heating control system, characterized in that: It includes a temperature control component, multiple pressure plates, side plates, partitions and connecting rods. The multiple pressure plates are symmetrically arranged up and down. The bottom end of the top pressure plate is connected to a battery holder. The battery holder is arrayed with holes, and single cells are connected in the holes. The single cells and multiple connecting rods are connected between the multiple pressure plates. The connecting rods penetrate the battery holder. The temperature control component includes a temperature relay, multiple side plates, partitions and a heating film. The multiple single cells are horizontally grouped as a group. The multiple heating films are respectively connected to the same side walls of the multiple groups of single cells. The hole spacing of the battery holder is greater than the sum of the diameter of the single cell and the thickness of the heating film. The multiple partitions are symmetrically connected to both sides of the battery holder and are vertically arranged with the heating film. The temperature sensing surface of the temperature relay is connected to one of the partitions, and the temperature relay is embedded in one of the side plates. The multiple side plates are symmetrically connected between the multiple pressure plates. Multiple blocks are vertically connected to both ends of the multiple side plates, and the blocks are connected between the multiple pressure plates.

2. The lithium battery module with integrated heating control system according to claim 1, characterized in that: The heating film is closely attached to the outer cylindrical surface of the single battery, and there is a gap between the heating film and the connecting rod.

3. The lithium battery module with integrated heating control system according to claim 2, characterized in that: A gap is left between the pressing plate and the battery bracket.

4. The lithium battery module with integrated heating control system according to claim 3, characterized in that: The lead-out nickel strip of the single cell passes through the gap between the pressing plate and the battery bracket, is located between the battery bracket and the stopper, and is connected to the side wall of the battery bracket through an adhesive tape.

5. The lithium battery module with integrated heating control system according to claim 4, characterized in that: There are multiple battery brackets, and the multiple battery brackets are symmetrically arranged in an upper and lower direction.

6. The lithium battery module with integrated heating control system according to claim 5, characterized in that: The length of the stopper is greater than the length of the pressing plate.

7. The lithium battery module with integrated heating control system according to claim 6, characterized in that: There is no gap between the temperature relay, the partition and the plurality of heating films.

8. The lithium battery module with integrated heating control system according to claim 7, characterized in that: The stopper is provided with a plurality of threaded holes.

9. A lithium battery module with an integrated heating control system prepared according to any one of claims 1 to 8, characterized in that: The lithium battery module can be used alone or in combination.

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