Battery heat uniformizing block

Abstract

The utility model discloses a battery heat uniformizing block. The device comprises a uniform heat unit, a temperature-sensitive unit and a temperature control unit, a battery model is arranged in the uniform heating unit; the temperature-sensitive unit is used for acquiring the temperature of the battery model; the temperature control unit comprises a microcontroller and a heating module, and the temperature sensitive unit is in signal connection with the temperature control unit and is used for transmitting the temperature of the battery model to the microcontroller; the microcontroller controls the heating power of the heating module according to the temperature of the battery model and a preset temperature. According to the utility model, the battery electrode lead-out pole is designed on the cylindrical battery heat uniformizing block, so that the battery is more convenient to charge. The movable electrode and the fixed electrode take red copper as a substrate and are plated with nickel on the surface; the characteristics of low contact resistance and corrosion and oxidation resistance are realized; when in use, an engineering plastic bracket is fixed on two sides of an aluminum heat uniformizing block and is tightly connected with a battery electrode, the stability and the uniformity of a temperature control temperature field on the surface of the battery are considered, and a determined path can be provided for heat flow conduction.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery heat equalizing block. Background Art

[0002] Affected by various factors such as manufacturers and application scenarios, the geometric shapes of current commercial lithium-ion batteries show a diversified development trend. This situation poses higher requirements for the compatibility design between the calorimeter and the battery to be measured.

[0003] Currently, lithium-ion batteries on the market are mainly divided into soft-pack batteries encapsulated with aluminum-plastic composite films and hard-shell batteries encapsulated with metals according to different packaging materials. Among them, the soft-pack batteries mainly include square soft-pack batteries, and the hard-shell batteries are divided into square hard-shell batteries and cylindrical hard-shell batteries.

[0004] The largest surface of the square soft-pack battery and the square hard-shell battery is rectangular and the surface is relatively flat. Therefore, the mechanical design of the heat equalizing block for such batteries is relatively simple, and generally a cuboid design is adopted. At the same time, to reduce the temperature gradient in the heat transfer structure of the calorimeter and improve the uniformity of the battery surface temperature, 6061 aluminum with high thermal conductivity is used as the material of the heat equalizing block. Compared with the heat equalizing block for square batteries, the design of the heat equalizing block for cylindrical batteries is more complex. To improve the uniformity and stability of the temperature of the cylindrical battery during the isothermal test, when designing the heat equalizing block, in addition to selecting 6061 aluminum with high thermal conductivity in terms of material selection, the mechanical structure design should make the heat equalizing block wrap the battery as much as possible. Since the largest surface of the cylindrical battery is a curved surface, therefore, the corresponding curved surface design is adopted on the side where the heat equalizing block fits the battery. In addition to the consideration of the fitting property, the problem of leading out the charging and discharging wires of the cylindrical battery also needs to be considered during the design of the heat equalizing block for the cylindrical battery. Compared with square batteries, the electrodes of cylindrical batteries are smaller and it is difficult to connect the battery to the charging and discharging equipment through wires. And the existing method of leading out the charging and discharging wires of the cylindrical battery by welding nickel strips has a risk of short circuit between aluminum heat equalizing blocks. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a battery heat equalizing block to solve the problems put forward in the above background art.

[0006] The utility model includes a heat equalizing unit, a temperature sensing unit and a temperature control unit. A battery model is built in the heat equalizing unit; the temperature sensing unit is used to obtain the temperature of the battery model; the temperature control unit includes a microcontroller and a heating module. The temperature sensing unit is signal-connected to the temperature control unit and is used to transmit the temperature of the battery model to the microcontroller; the microcontroller controls the heating power of the heating module according to the temperature of the battery model and the preset temperature.

[0007] In one aspect, the heat - equalizing unit adopts two aluminum heat - equalizing blocks. There is a cavity between the two aluminum heat - equalizing blocks for placing the battery model; and the shape of the cavity matches the outer shape of the battery model.

[0008] In one aspect, it further includes a moving electrode and a fixed electrode. The moving electrode contacts one end of the battery model, and the fixed electrode contacts the other end of the battery model; the moving electrode restricts the shaking of the battery model through a spring.

[0009] In one aspect, both the moving electrode and the fixed electrode are configured with brackets, and the brackets are fixed on the end face of the heat - equalizing unit.

[0010] In one aspect, the temperature - sensitive unit adopts a thermistor and is placed in a blind hole on the heat - equalizing unit.

[0011] In one aspect, the heating module is arranged on the surface of the battery model, and heat - conducting silica gel is filled between the cavity and the heating module.

[0012] In one aspect, both the moving electrode and the fixed electrode have a copper - based substrate with a nickel plating on the surface.

[0013] In one aspect, flat washers are configured on the post parts of the moving electrode and the fixed electrode.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] (1) For this kind of battery heat - equalizing block, by designing battery electrode lead - out posts on the cylindrical battery heat - equalizing block, it makes battery charging more convenient. The moving electrode and the fixed electrode have a copper - based substrate with a nickel plating on the surface; they have the characteristics of low contact impedance and corrosion - resistant oxidation; when in use, they are fixed on both sides of the aluminum heat - equalizing block and tightly connected to the battery electrodes through high - insulation and low - thermal - conductivity engineering plastic brackets, taking into account the stability and uniformity of the temperature field for controlling the battery surface and being able to provide a definite path for heat conduction.

[0016] (2) For this kind of battery heat - equalizing block, by adopting 6061 aluminum alloy with good thermal conductivity and setting a heat - conducting silica gel plate in material selection, it has a relatively high thermal conductivity coefficient, enabling faster heat transfer and being beneficial to the rapid stability and uniformity of the battery temperature field.

[0017] (3) For this kind of battery heat - equalizing block, to enable good contact area between the cylindrical battery and the aluminum heat - equalizing block, the heat - equalizing block adopts a curved - surface design to make the whole battery fit, and is provided with blind holes for fixing the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front - view structural schematic diagram of an embodiment of the present application;

[0019] Figure 2 Schematic side view structure diagram of an embodiment of the present application;

[0020] Figure 3 Explosion structure diagram of an embodiment of the present application;

[0021] Figure 4 Schematic diagram of the lower part structure of an embodiment of the present application.

[0022] In the figure: 1, aluminum heat - equalizing block; 2, engineering plastic bracket; 3, electrode post and movable electrode; 4, electrode post and fixed electrode; 5, battery model; 6, thermal conductive silica gel sheet; 7, spring; 8, thermistor; 9, heating sheet; 10, flat washer; 11, fixing stud; 12, signal wire; 13, blind hole. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figure 1 and Figure 2 shown, an embodiment of the present application provides a battery heat - equalizing block, which includes an aluminum heat - equalizing block 1, a heating sheet 9, and a battery model 5. There are two aluminum heat - equalizing blocks 1, which constitute the heat - equalizing unit; the battery model 5 is arranged inside the heat - equalizing unit; the heating sheet 9 constitutes a heating module for receiving signals from a microcontroller, and the microcontroller controls the heating power of the heating module according to the temperature of the battery model and a preset temperature. Blind holes 13 are opened in the aluminum heat - equalizing block for arranging a temperature sensor (i.e., a temperature - sensitive unit), and the temperature sensor is used to obtain the temperature of the battery model.

[0025] As Figure 3 and Figure 4 shown, the engineering plastic brackets 2 are assembled on both sides of the aluminum heat - equalizing block 1 through fixing studs 11. A movable electrode 3 with an electrode post and a fixed electrode 4 with an electrode post are arranged inside the two engineering plastic brackets 2. The movable electrode 3 and the fixed electrode 4 are based on copper and nickel - plated on the surface; they have the characteristics of low contact impedance and corrosion - resistant oxidation; during use, they are fixed on both sides of the aluminum heat - equalizing block 1 through the engineering plastic brackets 2 with high insulation and low thermal conductivity and are tightly connected to the battery electrodes. The embodiment of the present application takes into account the stability and uniformity of the temperature control temperature field on the battery surface and can provide a definite path for heat conduction.

[0026] In a preferred embodiment, flat washers 10 are provided on the surface of the electrode posts in a matching manner, and the sizes of the flat washers on both sides are different due to the different sizes of the electrode posts.

[0027] In a preferred embodiment, a thermistor 8 is provided in the upper and lower blind holes 13 of the aluminum heat - equalizing block 1 as a temperature sensor; the thermistor 8 leads out a signal line 12, which is connected to a single - chip microcomputer through the signal line 12 to control the power of the heating sheet 9.

[0028] In a preferred embodiment, a cavity is provided between two aluminum heat - equalizing blocks for placing the battery model. To ensure a good contact area between the cylindrical battery and the aluminum heat - equalizing block 1, the cavity is designed with a curved surface so that the battery fits entirely.

[0029] In a preferred embodiment, springs 7 that match the preset space inside the engineering plastic bracket 2 are provided at the top and bottom of the moving electrode 3 to prevent the battery from shaking.

[0030] In a preferred embodiment, a heat - conductive silicone plate 6 and a heating sheet 9 are respectively provided on the surface of the battery model 5. When the battery heat - equalizing block works, the battery is heated to a preset temperature through the heating sheet 9. If the battery is charged or discharged, the heat generated by the battery causes the temperature to rise. The power of the heating sheet is reduced to keep the battery temperature at the initial preset temperature. The reduced power of the heating sheet is the power generated by the battery at the preset temperature. The heat - conductive silicone plate 6 is wrapped outside the heating sheet 9. The use of 6061 aluminum alloy with good heat - conductive performance in combination with the heat - conductive silicone plate 6 gives it a high heat - conduction coefficient, enabling rapid heat transfer, which is beneficial to the rapid stabilization and uniformity of the battery temperature field.

[0031] In the embodiment of the present application, the cylindrical battery heat - equalizing block is designed with battery electrode lead - out posts. The engineering plastic bracket 2 is fixed on both sides of the aluminum heat - equalizing block 1 and connected to the battery electrodes. The connection tightness is improved by tightening the flat washer 10 with an externally - equipped nut. When the battery heat - equalizing block is not in use, the flat washer 10 does not tightly adhere to the engineering plastic bracket, as shown in Figure 1 .

[0032] The above - mentioned specific embodiments are used to explain and illustrate the present invention, rather than to limit the present invention. Any modification and change made within the spirit and protection scope of the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A battery uniform heating block, comprising a uniform heating unit, a temperature sensitive unit and a temperature control unit, characterized in that: The uniform heat unit has a built-in battery model; The temperature-sensitive unit is used to obtain the temperature of the battery model; The temperature control unit includes a microcontroller and a heating module. The temperature-sensitive unit is connected to the temperature control unit signal and is used to transmit the temperature of the battery model to the microcontroller. The microcontroller controls the heating power of the heating module according to the temperature of the battery model and a preset temperature. The uniform heating unit uses two aluminum uniform heating blocks, and a cavity is provided between the two aluminum uniform heating blocks for placing the battery model; and the shape of the cavity matches the appearance of the battery model; It also includes a moving electrode and a fixed electrode, the moving electrode contacts one end of the battery model, and the fixed electrode contacts the other end of the battery model; the moving electrode limits the shaking of the battery model through a spring; The movable electrode and the fixed electrode are both provided with brackets, and the brackets are fixed on the end surface of the heat-uniform unit.

2. A battery heat equalization block according to claim 1, characterized in that: The temperature-sensitive unit is a thermistor and is placed in a blind hole on the heat-distributing unit.

3. A battery heat equalization block according to claim 1, characterized in that: The heating module is arranged on the surface of the battery model, and heat-conducting silica gel is filled between the cavity and the heating module.

4. The battery heat equalization block according to claim 1, characterized in that: The movable electrode and the fixed electrode are based on copper, and the surface is plated with nickel.

5. A battery heat equalizing block according to claim 1 or 4, characterized in that: The pole parts of the movable electrode and the fixed electrode are provided with flat washers.

Images